There are 168 ways for 6 adults and 3 children to stand together in a line with no adjacent children.
we can treat the 6 adults as distinct entities and place them in the line first. There are 6! (factorial) ways to arrange the adults. Now, we have 7 spaces between the adults (including the ends) where the children can be placed. We need to choose 3 out of these 7 spaces for the children, which can be done in 7C3 ways (7 choose 3). Therefore, the total number of arrangements is 6! × 7C3 = 720 × 35 = 16800. However, we need to exclude the cases where two or more children are adjacent. By considering the possible positions of two adjacent children, there are 48 such cases. Subtracting these cases from the total gives us 16800 - 48 = 16752. Therefore, there are 16752 ways for 6 adults and 3 children to stand together in a line with no adjacent children.
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Compute the following by using ancient Egyptian multiplication: (a) 74 X 64 (b) 129 X 413 (c) 58 X 692 (d) 4968 X 1234
Using Ancient Egyptian multiplication, the values are obtained as: (a) 74 × 64 = 2724: (b) 129 × 413 = 35405: (c) 58 × 692 = 30456: (d) 4968 × 1234 = 6148172.
Ancient Egyptian multiplication, also known as Egyptian multiplication or the method of multiplication through doubling and halving, is a method used by ancient Egyptians to multiply two numbers.
It involves breaking down one of the numbers into a sum of powers of two and then adding the corresponding multiples of the other number. Here's how you can compute the given multiplications using ancient Egyptian multiplication:
(a) 74 × 64:
We start with the number 1 and keep doubling it until we reach a number greater than or equal to 74. We then create a column for each power of 2 that was used, and write the corresponding multiple of 64 in each column. Finally, we add the numbers in the columns corresponding to the powers of 2 that make up 74.
1 × 64 = 64
2 × 64 = 128
4 × 64 = 256
8 × 64 = 512
16 × 64 = 1024
32 × 64 = 2048
Adding the numbers corresponding to powers of 2 that make up 74:
64 + 0 + 0 + 512 + 0 + 2048 = 2724
Therefore, 74 × 64 = 2724.
(b) 129 × 413:
1 × 413 = 413
2 × 413 = 826
4 × 413 = 1652
8 × 413 = 3304
16 × 413 = 6608
32 × 413 = 13216
64 × 413 = 26432
Adding the numbers corresponding to powers of 2 that make up 129:
413 + 0 + 1652 + 0 + 6608 + 0 + 26432 = 35405
Therefore, 129 × 413 = 35405.
(c) 58 × 692:
1 × 692 = 692
2 × 692 = 1384
4 × 692 = 2768
8 × 692 = 5536
16 × 692 = 11072
32 × 692 = 22144
Adding the numbers corresponding to powers of 2 that make up 58:
692 + 1384 + 0 + 5536 + 0 + 22144 = 30456
Therefore, 58 × 692 = 30456.
(d) 4968 × 1234:
1 × 1234 = 1234
2 × 1234 = 2468
4 × 1234 = 4936
8 × 1234 = 9868
16 × 1234 = 19668
32 × 1234 = 39468
64 × 1234 = 78936
128 × 1234 = 157872
256 × 1234 = 315744
512 × 1234 = 631488
1024 × 1234 = 1262976
Adding the numbers corresponding to powers of 2 that make up 4968:
1234 + 2468 + 4936 + 0 + 19668 + 39468 + 78936 + 157872 + 315744 + 0 + 1262976 = 6148172
Therefore, 4968 × 1234 = 6148172.
Using the ancient Egyptian multiplication method, we have computed the products for the given multiplications.
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80% of grade 8 students, that is, 60 students want a new ice-cream shop in the
cafeteria. The total number of grade 8 students are?
Answer:
48
Step-by-step explanation:
60 students X 80%=48
20% is 12 students
40% is 24 students
60% is 36 students
so on and so forth.
Answer:
48.
Step-by-step explanation:
.80 x 60 = 48
Lighthouse B is 9 miles west of lighthouse a a boat leaves a and sales 6 miles. At this time it is lighted from B. If the bearing of the boat from B is North 64° east how far from be is the boat?
Answer:
12.61 miles
Step-by-step explanation:
The distance of lighthouse B from lighthouse A, the distance from lighthouse A to the boat and the distance of lighthouse B from the boat all form a triangle. Since lighthouse B is west of lighthouse A, and at a distance of 9 miles form lighthouse A, light house A is at a bearing of North 90° East of lighthouse B. The distance from lighthouse A to the boat is 6 miles, and the bearing of the boat from lighthouse B is North 64° East.
So, the angle between the distance from lighthouse B to the boat and lighthouse B to lighthouse A is 90° - 64° = 26°
Since we have two sides and an angle, we use the sine rule
a/sinA = b/sinB where a = 6, A = 26°, b = 9, B = unknown
So, sinB = bsinA/a
= 9sin26/6
= 3(0.4384)/2
= 1.3151/2
= 0.6576
B = sin⁻¹(0.6576)
= 41.11°
≅ 41.1°
We now find the third angle in the triangle, C(the angle facing the distance from lighthouse B to the boat) from
26° + 41.1° + C = 180° (sum of angles in a triangle)
67.1° + C = 180°
C = 180° - 67.1° = 112.9°
Using the sine rule again to find the third side, c(the distance from lighthouse B to the boat), we have
a/sinA = c/sinC
c = asinC/sinA
= 6sin112.9°/sin26°
= 6(0.9212)/0.4384
= 5.5271/0.4384
= 12.61 miles
5.The employees of Xitrex, Inc., are paid each Friday. The company’s fiscal year-end is June 30, which falls on a Wednesday for the current year. Salaries and wages are earned evenly throughout the five-day work week, and $13,000 will be paid on Friday, July 2.
Required:
1. Prepare an adjusting entry to record the accrued salaries and wages as of June 30, a reversing entry on July 1, and an entry to record the payment of salaries and wages on July 2.
2. Prepare journal entries to record the accrued salaries and wages as of June 30 and the payment of salaries and wages on July 2 assuming a reversing entry is not recorded.
The entry to record the payment of salaries and wages on July 2 is a debit to Salaries and Wages Payable and a credit to Cash.
1. The adjusting entry on June 30 is necessary to recognize the expense for salaries and wages earned but not yet paid. It increases the Salaries and Wages Expense account and creates a liability in the Salaries and Wages Payable account.
The reversing entry on July 1 is made to simplify the subsequent accounting process and ensure accurate financial reporting. On July 2, when the payment is made, the Salaries and Wages Payable account is reduced, and Cash is decreased by the same amount.
2. Without a reversing entry, the journal entry on June 30 still recognizes the expense for salaries and wages earned but unpaid. The Salaries and Wages Expense account is debited, reflecting the expense, and the Salaries and Wages Payable account is credited, indicating the liability.
On July 2, when the payment is made, the Salaries and Wages Payable account is reduced, and Cash is decreased by the same amount. The absence of a reversing entry means that the Salaries and Wages Expense account will continue to reflect the total expense accrued throughout the fiscal year, rather than resetting to zero at the beginning of the new period.
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Margarita was buying soil for her spring garden. What would be the most reasonable amount of soil she would need to buy for a garden?
A. 5 grams
B. 50 liters
C. 50 kilograms
D. 5,000 kilograms
Answer:
C
Step-by-step explanation:
No soil bag weighs A or B and D is too much unless she has many acres.
Answer The guy Above is right
Kendra ordered a set of blue and brown pins. She received 100 pins, and 30% of them were blue. How many blue pins did Kendra receive?
Answer:
30 blue pins
Step-by-step explanation:
30% is the same as 30 out of 100, so this can be written in this fraction: [tex]\frac{30}{100}[/tex]
now, you should multiply this fraction by the total number of pins she ordered:
100 x [tex]\frac{30}{100}[/tex]
to solve this, you can simplify by dividing 100 by 100, this equals 1
30 times 1 is 30
there are 30 blue pins
Answer:
30 hair pins were blue
Step-by-step explanation:
100 x 0.3 = 30
Shade 3/4 on the grid
A particular type of mouse's weights are normally distributed, with a mean of 409 grams and a standard deviation of 24 grams. If you pick one mouse at random, find the following: (round all probabilities to four decimal places) a) What is the probability that the mouse weighs less than 332 grams? b) What is the probability that the mouse weighs more than 480 grams? c) What is the probability that the mouse weighs between 332 and 480 grams? d) Is it unlikely that a randomly chosen mouse would weigh less than 332 grams? No, the likelihood exceeds 5% Yes, the likelihood is less than 50% Yes, the likelihood is less than 5% No, the likelihood exceeds 50% e) What is the cutoff for the heaviest 6% of this type of mouse? grams (round to the nearest whole gram).
a) To find the probability that the mouse weighs less than 332 grams is calculated using the z-score formula which is: z= (x-μ)/σ where, x=332μ=409σ=24z= (332−409)/24z=−3.21
Hence, P (x < 332) = P (z < -3.21)
The probability that the mouse weighs less than 332 grams is approximately equal to 0.0007. Therefore, the answer is 0.0007 (rounded to four decimal places).
b) To find the probability that the mouse weighs more than 480 grams is calculated using the z-score formula which is: z= (x-μ)/σwhere,x=480μ=409σ=24z= (480−409)/24z=2.96
Hence, P (x > 480) = P (z > 2.96)
The probability that the mouse weighs more than 480 grams is approximately equal to 0.0015. Therefore, the answer is 0.0015 (rounded to four decimal places).
c) To find the probability that the mouse weighs between 332 and 480 grams is calculated using the z-score formula which is: P (332 < x < 480) = P (-3.21 < z < 2.96)
Hence, the probability that the mouse weighs between 332 and 480 grams is approximately equal to 0.9980. Therefore, the answer is 0.9980 (rounded to four decimal places).
d) The probability of a randomly chosen mouse weighing less than 332 grams is found to be P (x < 332) = 0.0007 which is less than 5%. Therefore, it is unlikely that a randomly chosen mouse would weigh less than 332 grams. Hence, the answer is "Yes, the likelihood is less than 5%".
e) To find the cutoff for the heaviest 6% of this type of mouse can be done by using the Z-table, that gives the z-score for any given probability. For the heaviest 6%, we need to find the z-score corresponding to a probability of 0.94 (100% - 6%). Hence, the Z-score for 0.94 probability is 1.55. Cutoff weight = μ + Z-score * σ= 409 + 1.55 * 24 = 447.2 ≈ 447 (rounded to the nearest whole gram). Therefore, the answer is 447 (rounded to the nearest whole gram).
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Ms. Keating’s class wants to compare the use of social media between the seventh-grade students and eighth-grade students at Valleydale School.The MAD (the average distance between each data value and the mean) for both data sets is approximately 14. What can you infer about the two sets of data?
Answer:
Need to add picture
Step-by-step explanation:
In figure find the value of x triangle PQR
Answer:
x = 35
m<PQR = 70
Step-by-step explanation:
This is an isoceles triangle so the base angles are the same and they all add up to 180 so:
2x + 2x + 40 = 180
4x + 40 = 180
4x = 140
x = 35
m<PQR:
2x
2(35)
70
18. In the photograph of a father and his daughter, the daughter's height is 2 cm and the father's height is 5 cm. If the father's height is actually 185 cm, how tall is the daughter?
Answer:
114cm
Step-by-step explanation:
When you're in a situation like this, you use ratios!
If the father's height is 5cm, and actually 185cm, the ratio of photo height and actual height is 1:57.
When we use this, the father is 57 times taller than him inside the photo, so since the daughter (in photo) is 2 cm, her height should be 2*57 cm.
2*57 = 114, which concludes to 114 cm.
:)
HEY LOL PLEASE ANSWER THESE. PLEASE IM BEGGING YOU. HELP ME
Answer:
a. ∆ABC ~ ∆A'B'C'
b. Enlargement
c. Scale factor = 4
Step-by-step explanation:
a. <A corresponds to <A'
<B corresponds to <B'
<C corresponds to <C',
Therefore, the similarity statement would be: ∆ABC ~ ∆A'B'C'
b. The image of the dilation is an enlargement of the original figure because the side lengths of ∆A'B'C are larger than the corresponding side lengths of ∆ABC.
c. Scale factor = the ratio of the corresponding sides
Thus:
Scale factor = A'B'/AB = B'C'/BC = A'C'/AC
Scale factor = 24/6 = 48/12 = 60/15 = 4
Scale factor = 4
Solve for X if 8X = 40
Step-by-step explanation:
X=40/8
X=5 Answer
hope it helps
Answer:
X= 5
Step-by-step explanation:
NOTE: DIVIDE 8 IN BOTH SIDE
8X/8 = X
40/8 = 5
SO X = 5
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the polynomial x^2+bx+15 has a factor of x-3. what is the value of b ?
Answer:
b = -8
Step-by-step explanation:
Attachment.....added.
Hope it helps :)
below there was a daily rental cost for ski equipment at benton mountin ski resort radall rents one set of skis two set of poles and two pairs of boots the sales tax for the rental was 7.69 and he paid with a 100 bill how much chang should randall recive frome the 100 dollar bill
Answer:
hi
Step-by-step explanation:
4. (Newton's Method). Consider the problem of finding the root of the function f(x)=x+el.812r in [-1,0]. (i) Find the formula of the iteration function g(x) = x- f(x) f'(x) for Newton's method, and then work as instructed in Problem 3, that is, plot the graphs of g(x) and g'(x) on [-1,0] with the use of Wa to show convergence of Newton's method on [-1,0] as a Fixed-Point. Iteration technique. (ii) Apply Newton's method to find an approximation py of the root of the equation x+el.812x = 0 in [-1,0] satisfying RE(PNPN-1 < 10-5) by taking po = -1 as the initial approximation. All calculations are to be carried out in the FPA7. Present the results of your calculations in a standard output table for the method of the form TL Pn-1 Pn RE(pn pn-1) ⠀ B : (As for Problem 3, your answers to the problem should consist of two graphs, a conclusion on convergence of Newton's method, a standard output table, and a conclusion regarding an approximation PN.) As was discussed during the last lecture, applications of some cruder root-finding methods can, and often do, precede application of Newton's method (and the Bisection method is one that is used most commonly for this purpose). 4. (Newton's Method). Consider the problem of finding the root of the function f(x)=x+²-812 in 1-1,0). (1) Find the formula of the iteration function f(x) g(x) = P(x) for Newton's method, and then work as instructed in Problem 3, that is, plot the graphs of g(x) and g'(z) on [-1.0 with the use of Who to show convergence of Newton's method on [-1.0] as a Fixed-Point Iteration technique. (ii) Apply Newton's method to find an approximation py of the root of the equation z+el-813x = 0 in (-1,0 satisfying RE(PNPN-1 <10-5) by taking po = -1 as the initial approximation. All calculations are to be carried out in the FPA7. Present the results of your calculations in a standard output table for the method of the form P-1 PRE(PP-1) (As for Problem 3, your answers to the problem should consist of two graphs, a conclusion on convergence of Newton's method, a standard output table, and a conclusion regarding an approximation px-) As was discussed during the last lecture, applications of some cruder root-finding methods can, and often do, precede application of Newton's method (and the Bisection method is one that is used most commonly for this purpose).
The formula of the iteration function for Newton's method is given by g(x) = x - f(x) / f'(x).
The graph of g(x) and g'(x) shows convergence of Newton's method on [-1, 0] as a Fixed-Point Iteration technique. Applying Newton's method to find an approximation of the root of the equation x + e^(-0.812x) = 0 in [-1, 0], with an initial approximation of p0 = -1, gives an approximation of p_n = -0.567143. The standard output table for this method is: TLP_nP_n-1RE(P_nP_n-1) 0-1.00000000000.1559875219 1-0.4801700174-1.00000000000.4801700174 2-0.5889524214-0.4801700174 0.1087824049 3-0.5671941668-0.5889524214 0.0217582546 4-0.5671432850-0.5671941668 0.0000508818. The conclusion is that the Newton's method converges to a root of the equation x + e^(-0.812x) = 0 in [-1, 0] with a tolerance of 10^-5.
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School administrators in Boston want to assess the efficacy of a new reading program they wish to put in place. Therefore, they randomly assign some schools in the city to institute the new reading program and other schools to remain on the traditional reading program. When performing the analysis to determine whether students using the new reading program perform better, the educators control for socioeconomic status, a variable known to be related to educational outcomes. What kind of analysis have the educators performed
Answer:
The selection of the schools is done by random sampling, the remaining schools are considered as the control and stratified sampling for the selection of students for analysis is considered
Step-by-step explanation:
Based on the scenario, the following key highlights are presented:
The sampling for selection is carried out randomly.The control group is maintained.The selection of students for analysis is considered with a specific socio-economic status.This indicates that the selection of the schools is done by random sampling, the remaining schools are considered as the control and stratified sampling for the selection of students for analysis is considered.
The estimated regression equation for a model involving two independent variables and 10 observations follows. Here SST = 6,724.125, SSE = 507.75, S_b_1 = 0.0813, and s_b_2 = 0.0567.
ŷ = 29.1270 +0.5906x_1 + 0.4980x_2
a. Interpret the regression coefficients in this estimated regression equation
A one-unit increase in x_1 will lead to a 0.5906 unit decrease in y, when x_2 is held constant. A one-unit increase in x_2 will lead to a 0.498 unit increase in y, when x_1 is held constant.
A one-unit increase in x_1 will lead to a 0.5906 unit increase in y, when x_2 is held constant. A one-unit increase in x_2 will lead to a 0.498 unit decrease in y, when x_1 is held constant.
A one-unit increase in x_1 will lead to a 0.5906 unit increase in y, when x_2 is held constant. A one-unit increase in x_2 will lead to a 0.498 unit increase in y, when x_1 is held constant.
A one-unit increase in x_1 will lead to a 0.5906 unit increase in y. A one-unit increase in x_2 will lead to a 0.498 unit increase in y.
Option C is correct: A one-unit increase in x1 will lead to a 0.5906 unit increase in y, when x2 is held constant. A one-unit increase in x2 will lead to a 0.498 unit increase in y, when x1 is held constant.
The estimated regression equation for a model involving two independent variables and 10 observations follows. Here SST = 6,724.125,
SSE = 507.75,
Sb1 = 0.0813, and
Sb2 = 0.0567.
ŷ = 29.1270 +0.5906x1 + 0.4980x2
Interpretation of Regression Coefficients:
Below are the explanations of the regression coefficients in the estimated regression equation:
1. The regression coefficient for x1 is 0.5906. A one-unit increase in x1 will lead to a 0.5906 unit increase in y, when x2 is held constant.
2. The regression coefficient for x2 is 0.4980. A one-unit increase in x2 will lead to a 0.498 unit increase in y, when x1 is held constant.
Therefore, Option C is correct: A one-unit increase in x1 will lead to a 0.5906 unit increase in y, when x2 is held constant. A one-unit increase in x2 will lead to a 0.498 unit increase in y, when x1 is held constant.
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help☝️☝️☝️☝️☝️☝️☝️☝️☝️☝️☝️
Answer:
40 + 25 = 65
49 + 63 = 112
63 + 15 = 78
7×16 =112
26 × 3 =78
5×13=65
so the answer is
40 + 25 -------- 5 × 13
49 + 63 -------- 7 × 16
63 + 15 --------- 26 × 3
i hope this help you
A rectangle has a length of 3 units and a width of
y units. Write an expression for the area of this
rectangle.
Answer:
An expression for this would be 3y as length * breadth is the area of a rectangle.
This large cube sculpture at the University of Michigan is made of steel. Even though it is extremely heavy, students can walk by and spin the cube very easily. Each side of the cube measures 15 feet across.
If this cube was a perfect cube and filled with sand, how much sand would be needed to completely fill it?
We would need 337,500 pounds of sand to completely fill the cube with sides measuring 15 feet across if it were a perfect cube.
The volume of a cube is calculated by taking the length of one side and raising it to the power of 3. In this case, the cube has sides that measure 15 feet each, so the volume can be calculated as:
Volume of cube = (Length of one side)^3 = (15 feet)^3 = 3,375 cubic feet
To fill the cube with sand, we would need to add enough sand to completely fill this volume. The weight of the sand we need can be calculated using its density. The density of sand varies depending on the type of sand, but a common density for dry sand is around 100 pounds per cubic foot.
Therefore, the weight of sand needed to fill the cube would be:
Weight of sand = (Volume of cube) x (Density of sand) = 3,375 cubic feet x 100 pounds per cubic foot = 337,500 pounds
It is worth noting that the real cube sculpture at the University of Michigan is not a perfect cube and is not filled with sand.
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give an estimated simple linear regression equation of = 46.2 589.2x with a coefficient of determination r2 of 0.7523, interpret the coefficient of determination for this equation.
The estimated simple linear regression equation is y = 46.2 + 589.2x, with a coefficient of determination (r^2) of 0.7523.
The coefficient of determination (r^2) measures the proportion of the total variation in the dependent variable (y) that can be explained by the independent variable (x) in a linear regression model. In this case, the coefficient of determination is 0.7523, indicating that approximately 75.23% of the variation in the dependent variable (y) can be explained by the independent variable (x) using the given regression equation. This means that the linear relationship between x and y accounts for 75.23% of the variability observed in y. The remaining 24.77% of the variation is attributed to other factors not included in the model. A higher value of r^2 indicates a stronger relationship between the variables.
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The price of an mp3 player is reduced by 60%. The expression c – 0.6c represents the sale price. Which represents an equivalent expression to determine the sale price?
Answer:
0.4c
Step-by-step explanation:
Given that :
Price of mp3 is reduced by 60%
Let initial price of mp3 = c
Discount on price = 60% = 0.6
Discounted price = initial price - discount on price
Discounted price = c - 0.6c
Discounted price = 0.4c
If a translation of the figure above is plotted 7 units to the right and 2 units up, where will point A' be located on the new figure?
A. (7,2)
B. (-12,3)
C. (12,3)
D. (2,7)
If a translation of the figure above is plotted 7 units to the right and 2 units up, the (12,3) point A' will be located on the new figure.
What is translation?The process of changing the location of the image on the coordinate system will be known as the translation. Here the image is translated as;
The given coordinate of the point is:- (7, 2)
Then it is represented by a change in the function graph, according to operations such as multiplication or sum/subtraction either in it’s range(involving values of y) or in it’s domain(involving values of x because we just count 7 units to the right and then 2 units up.
Hence If a translation of the figure above is plotted 7 units to the right and 2 units up, the (12,3) point A' will be located on the new figure.
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You arrive at the airport at 1:50 pm and your flight leaves at 5:20 pm. How many MINUTES will you need to wait?
Answer:
you will need to wait 3 hours and 30 mins
Step-by-step explanation:
Answer:
Hello There!!
Step-by-step explanation:
It is 3 hours and 30 minutes which is 210 minutes altogether.
hope this helps,have a great day!!
~Pinky~
find the 9th term in 3, -11, -25, -39
Answer:
-53
Step-by-step explanation:
USA Today reported that the population mean life span of people who live in Hawaii is 77 years. A random sample of 20 obituary notices gave a sample mean life span of x= 71.4 years and a sample standard deviation s = 20.65 years. Assuming that the life span of people in Hawaii is normally distributed, does this indicate that the population mean life span is less than 77 years? Use a 5% level of significance. a.) What is a? State the null and alternate hypotheses. Will you use a left-tailed, right-tailed, or two tailed test?
α = ____
H_0: µ = _____
H_1: µ = _____
The test is a _______ test.
Yes, there is evidence to suggest that the population mean life span in Hawaii is less than 77 years.
How to find that is there statistical evidence that the mean life span in Hawaii is less than 77 years?The hypothesis test in question aims to determine if there is sufficient evidence to support the claim that the population mean life span in Hawaii is less than 77 years.
The null hypothesis (H₀) assumes that the mean life span is equal to 77 years, while the alternative hypothesis (H₁) suggests that the mean life span is less than 77 years.
To conduct the hypothesis test, a significance level (α) of 5% is chosen, which corresponds to a 95% confidence level.
Since the question asks whether the population mean is less than 77 years, this is a left-tailed test.
Using the given sample information, the test statistic can be calculated using the formula:
t = (x - µ) / (s / √n), where x is the sample mean (71.4), µ is the population mean (77), s is the sample standard deviation (20.65), and n is the sample size (20).
By plugging in the values, the test statistic is calculated to be t = (71.4 - 77) / (20.65 / √20) ≈ -1.64.
To determine whether the test statistic falls in the critical region, the critical value for a left-tailed test at α = 0.05 is obtained from the t-distribution table or calculator.
With 19 degrees of freedom, the critical value is approximately -1.73.
Since the test statistic (-1.64) is not less than the critical value (-1.73), we fail to reject the null hypothesis.
This means that there is insufficient evidence to conclude that the population mean life span in Hawaii is less than 77 years at a 5% level of significance.
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What divided by 76 equals 127
Easy one please answer ASAP
Answer is : 9692
cxcvbnm
The length of title a is about 2.23607 inches which mark on the tape measure is closest to 2,23607 inches ?
A machine press has 51 yards of steel for making 4-inch nails. How many nails can be pressed from the steel?