Solve the problem.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 

style="vertical-align: -4.0px;" /> at  Round your answer to the nearest pound of force?



A. 20,149 lb

B. 20,719 lb

C. 20,017 lb

D. 20,181 lb

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Answer: A

Mathematics

Solve the problem.Evaluate   by using the series expansion for 

A. -1
B. 0
C. 1
D.

Let U = {q, r, s, t, u, v, w, x, y, z}  A = {q, s, u, w, y}  B = {q, s, y, z}  C = {v, w, x, y, z}. Determine the following.A ? (B ? C)

A. {q, r, w, y, z} B. {q, w, y} C. {q, y, z} D. {q, s, u, w, y, z}

Solve the problem.The population of a particular city is increasing at a rate proportional to its size. It follows the function P(t) = 1 + ke0.04t where k is a constant and t is the time in years. If the current population is 18,000, in how many years is the population expected to be 45,000? Round to the nearest year.

A. 23 yr B. 130 yr C. 10 yr D. 13 yr

Solve.Given the domain 0° to 90° give the ranges of all six trigonometric functions.

What will be an ideal response?