Add or subtract as indicated. Simplify if necessary. - 
- 
A. - 
B. - 
C. - 
D. 
Answer: A
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The life expectancy of a star is a power function of its mass. The value of the power in this function is 
. If the mass is increased by 43%, how is the life expectancy affected? Round your answer to two decimal places if necessary.
?
A. Life expectancy is increased by 40.89% B. Life expectancy is decreased by 40.89% C. Life expectancy is decreased by 59.11%. D. Life expectancy is increased by 59.11%.
Multiply and simplify the answer: 
× 
.
A. 
B. 
C. 
D. 
Solve.The area of a triangular poster is 870 square centimeters. Its altitude is 2 feet shorter than twice its base. Find the lengths of the altitude and base.
A. base = 60 cm; altitude = 14.5 cm B. base = 15 cm; altitude = 58 cm C. base = 30 cm; altitude = 58 cm D. base = 30 cm; altitude = 29 cm
Perform the indicated operations and simplify the result. Leave the answer in factored form.
A. 
B. 
C. 
D. 