Write the number in scientific notation.58.7
A. 5.87 × 10-1
B. 5.87 × 102
C. 5.87 × 10-2
D. 5.87 × 101
Answer: D
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Write the percent as a decimal.0.8%
A. 0.8 B. 0.08 C. 0.009 D. 0.008
Perform the indicated operation.-52
A. -25 B. 125 C. 25 D. -125
Translate the problem to a system of equations; then solve using the elimination method.Roberto invested some money at an APR of 8 percent, and then invested $3000 more than twice this amount at an APR of 9 percent. His total annual income from the two investments was $3650. How much was invested at 9 percent?
A. $26,000 B. $29,000 C. $9000 D. $2900
Solve the problem.The profit made when t units are sold, t > 0, is given by 
Determine the number of units to be sold in order for P = 0 (the break- even point).
A. t > 20 B. t = 20 or t = 11 C. t = 31 D. t = -20 or t = -11