Evaluate the expression for the given replacement values.xy, for x = 4 and y = 4
A. 3
B. 16
C. 44
D. 256
Answer: D
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Solve the problem.The radius of a ball is claimed to be 4.5 inches, with a possible error of 0.05 inch. Use differentials to approximate the maximum possible error in calculating the volume of the sphere and the surface area of the sphere.
A. 4.05? in.3; 1.8? in.2 B. 1.8? in.3; 4.05? in.2 C. 0.9? in.3; 18? in.2 D. 8.1? in.3; 3.6? in.2
Simplify the expression, writing the answer as a single term without negative exponents.
A. 
B. 
C. 
D. 
Find the discriminant. Then use it to determine the number and type of solutions to the quadratic equation. Do not solve the equation.2x2 + 36 = 12x
A. -144; two non-real solutions B. -36; two real solutions C. -144; one non-real solution D. 144; two real solutions
Suppose that a vending machine company is considering selling some of its machines. Suppose further that the income from these particular machines is a continuous stream with an annual rate of flow at time t given by 
Find the present value and future value of the machines over the next 3 years if the money is worth 11% compounded continuously. Round answers to the nearest dollar.
?
A. PV = $1,893FV = $2,633 B. ?PV = $1,893FV = $2,349 C. PV = $1,689FV = $2,349 D. PV = $1,689FV = $2,633 E. PV = $2,364FV = $2,633