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 

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



A. 27,041 lb

B. 26,339 lb

C. 26,471 lb

D. 26,503 lb

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Answer: C

Mathematics

Use logarithmic differentiation to find the derivative of y with respect to the independent variable.y = (x + 5) sin x

A. sin x ln (x + 5)
B.  (x + 5) ^{sin x}
C. (x + 5) ^{sin x}
D. cos x ln (x + 5) +  

Solve.In preparation for his new job, Tristan bought two suits at $194 a piece, four shirts at $26 a piece, two pairs of shoes at $78 a piece, four ties at $26 a piece, and five pairs of socks at $8 a piece. What was the total cost of these items?

A. $332 B. $792 C. $810 D. $752

Identify the vertex of the parabola.f(x) = -7(x + 3)2 + 5

A. (-3, -5) B. (-3, 5) C. (3, -5) D. (3, 5)

Divide and simplify. ÷ 

A. y
B.
C.
D.