Solve the problem. Round to the nearest tenth, if necessary.Two pipes together can fill a large tank in 10 hr. One of the pipes, used alone, takes 15 hr longer than the other to fill the tank. How long would each pipe take to fill the tank alone?
A. 25 hr; 40 hr
B. 15 hr; 30 hr
C. 12.5 hr; 27.5 hr
D. 10 hr; 25 hr
Answer: B
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The figure shows the velocity v or position s of a body moving along a coordinate line as a function of time t . Use the figure to answer the question. v (ft/sec)
What is the body's greatest velocity?
A. 2 ft/sec B. 4 ft/sec C. 5 ft/sec D. 3 ft/sec
Use the laws of exponents to simplify each expression using positive exponents only. Assume all variables represent nonzero real numbers.(x8)-6
A. 
B. - x48
C. -6x48
D. -6x8
Either the dimensions of two matrices or the matrices themselves are given. Find the dimensions of the product AB and the product BA. If either is not defined, say so.A = 
; B = 
.
A. AB is 3 × 3; BA is 3 × 3. B. AB is 1 × 1; BA is 1 × 1. C. AB is not defined; BA is not defined D. AB is 1 × 1; BA is 3 × 3.
Solve the problem.The polynomial 
gives the approximate total earnings of a company, in millions of dollars, where x represents the number of years since 1996. This model is valid for the years from 1996 to 2000. Determine the earnings for 2000. Round your answer to two decimals, if necessary.
A. $2.37 million B. $2.8 million C. $2.06 million D. $2.56 million