Solve.The force needed to keep a car from skidding on a curve varies jointly as the weight of the car and the square of the car's speed, and inversely as the radius of the curve. If a force of 
is needed to keep an 
car traveling at 20 mph from skidding on a curve of radius 
what force would be required to keep the same car from skidding on a curve of radius 
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Round your answer to the nearest pound of force?
A. 16,279 lb
B. 15,577 lb
C. 15,709 lb
D. 15,741 lb
Answer: C
Mathematics
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For the pair of functions, find the indicated composition.f(x) = 
x, g(x) = - 
xFind (f ? g)(x).
A. 0 B. -x C. 1 D. x
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Solve the exponential equation. Use a calculator to obtain a decimal approximation, correct to two decimal places, for the solution.e4x = 2
A. {2.77} B. {1.36} C. {0.17} D. {0.69}
Mathematics