Solve the problem.In a certain state, 3900 acres of farmland are being developed into housing developments per year. Create a function, f(x), that models the acres of farmland lost to development in x years.
A. f(x) = -2190x
B. f(x) = 3900x
C. f(x) = 2190x
D. f(x) = -3900x
Answer: B
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Find all the local maxima, local minima, and saddle points of the function.
A. f
= 15, saddle point; f
= 15, saddle point
B. f
= 15, saddle point
C. f
= - 45, local maximum
D. f
= 15, local minimum; f
= 15, local minimum
As part of a study on the metabolism of athletes, 400 college basketball players are randomly chosen and their weights taken. The distribution of the weights is approximately normal. The average weight is 215 pounds and the standard deviation is 15 pounds.Of the 400 players approximately how many weighed 200 pounds or less?
A. 32 B. 336 C. 64 D. 100 E. none of these
Find the present value to the nearest cent.Joshua obtained a loan of $7900 for 360 days at 12%. If the value of money is 14%, find the present value in 68 days.
A. $8272.24 B. $8330.25 C. $8300.05 D. $7945.72
Use the Principle of Composite Factors to finish the sentence.Because 11, 7, and 2 are prime factors of 30,338, it must be that . . .
A. 18, 13, 9, and 20 are composite factors of 30,338. B. 154 is a composite factor of 30,338. C. 77, 22, and 14 are composite factors of 30,338. D. 77, 22, 14, and 154 are composite factors of 30,338.