Evaluate the expression for the given value or values of the variables.-5x2 + 8x + 2; x = -2
A. -34
B. -4
C. -44
D. -38
Answer: A
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Solve the problem.A 15-kg mass is attached to a spring that hangs vertically and is stretched 2 m from the equilibrium position of the spring. Assume a linear spring with F(x) = kx. How much work is required to stretch the spring and lower the mass 1.5 m? Round to four decimal places when appropriate.
A. 248.0625 J B. 303.1875 J C. 523.6875 J D. 27.5625 J
Use the sum-of-the-years'-digits method of depreciation. Round to the nearest dollar.Find the book value at the end of the second year for an air filtration system which cost $6,300, has a life of 5 years, and an estimated scrap value of $630.
A. $3,402 B. $2,520 C. $4,032 D. $2,898
Solve the problem.Tom and Larry are food inspectors at a cookie making company. Tom tests every 20th batch of dough for fat percentage. Larry tests every 28th batch of dough for carbohydrate percentage. If they both start working at the same time, which batch will be the first that they both test?
A. The 140th batch B. The 280th batch C. The 70th batch D. The 35th batch
Find the surface area of the solid. Use 3.14 for ?.
A. 1000 sq ft B. 800 sq ft C. 600 sq ft D. 300 sq ft