Multiply. Assume all variables represent nonnegative real numbers.
(5
- 
)
A. 5 
- 6 
B. 5 
- 6
C. 4 
D. 5 
- 6
Answer: D
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Use integration by parts to establish a reduction formula for the integral.
, n ? 1
A. 
= 
cotn-1 x - 
B. 
= 
cotn-2 x - 
C. 
= - cotn-1 x + 
D. 
= 
cotn-1 x + 
Find the annual straight-line rate of depreciation for the estimated life.70 years
A. 0.7% B. 70% C. 1.4% D. 0.1%
Solve the problem.The average daily temperature T of a city in the United States is approximated by T = 55 - 23 cos 
(t - 30)where t is in days, 1 ? t ? 365, and t = 1 corresponds to January 1. For what range of values of t is the average daily temperature above 70°F? Use a calculator and round answers to the nearest whole number.
Fill in the blank(s) with the appropriate word(s).
Solve the problem.The length of a rectangular storage room is 7 feet longer than its width. If the area of the room is 98 square feet, find its dimensions.
A. 6 ft by 13 ft B. 7 ft by 14 ft C. 8 ft by 15 ft D. 6 ft by 15 ft