Simplify the rational expression. (Assume the denominator is nonzero.)
A. 
B. x + 8
C. x - 64
D. x - 8
Answer: D
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Solve the problem. Express the answer in scientific notation to two decimals unless requested otherwise.The median family income in a certain year was $46,676 and there were about 7.2 × 107 families. Calculate the total family income for that year.
A. $336 × 1012 B. $2 × 1012 C. $3.36 × 1012 D. $3.36 × 10-12
Find the measure of one interior angle of the polygon.
A. 120° B. 1080° C. 135° D. 108°
Solve the problem. Assume that simple interest is being calculated in each case. Round your answer to the nearest cent.Robert Hall bought a new computer system. To pay for the system, he borrowed 
from the credit union at 3
% simple interest for 120 days. Find the interest owed. (Use a 365 day year.)
A. $61.60 B. $50.40 C. $187.37 D. $46.84
Solve.
x = 
A. 1/4 B. -1/4 C. 4 D. -4