The function s = f(t) gives the position of a body moving on a coordinate line, with s in meters and t in seconds.s = 2t2 + 2t + 4, 0 ? t ? 2Find the body's speed and acceleration at the end of the time interval.
A. 6 m/sec, 2 m/sec2
B. 14 m/sec, 4 m/sec2
C. 10 m/sec, 8 m/sec2
D. 10 m/sec, 4 m/sec2
Answer: D
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Solve the problem. Round your answer to 2 decimal places when necessary.The overall U.S. death rate for 60 year-olds is approximately 12 deaths per 1000 people. Suppose that a life insurance company insures 2000 60-year-old people. The cost of the premium is $760 per year, and the death benefit is $55,000. What is the expected profit or loss for the insurance company?
A. $200,000 profit B. $1,320,000 loss C. $310,000 profit D. $181,760 profit
Perform the operations. 
A. 13 B. 10 C. 8 D. 50
Solve the equation and check your proposed solution.72 = -4z
A. 76 B. 1 C. -76 D. -18
Assume that the expressions given are denominators of fractions. Find the least common denominator. r2 + 4r + 3, r2 + r
A. r(r + 1)2 B. r(r + 3) C. r(r + 3)(r + 1) D. r(r + 1)