Find the area of the specified region.Shared by the circles r = 2 and r = 4 cos ?
A. 
?
B. 
(2? + 3
)
C. 
(4? - 3
)
D. 2?
Answer: C
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Measurements are made at two different times. Find the absolute change and then find the percentage change. Round answers to the nearest tenth if necessary.The value of Anna's house increased from $250,000 when she bought it 20 years ago to $1.31 million today.
A. Absolute change: $1,060,000 Percentage change: 80.9% B. Absolute change: $1,060,000 Percentage change: 42.4% C. Absolute change: $1,060,000 Percentage change: 424% D. Absolute change: $-1,060,000 Percentage change: 424%
Solve the problem.The lifespan for a pair of walking shoes is normally distributed with a mean of 
steps and standard deviation of 
steps. If a manufacture produces 6000 pairs of these shoes, how many can be expected to last for at least 756,000 steps?
A. ? 1313 pairs B. ? 1271 pairs C. ? 1205 pairs D. ? 1391 pairs
Solve. Give your answer as a mixed numeral.Peter must practice the piano 13
hours per week. He has already practiced 2
hours. How many more hours does he need to practice?
A. 10
hr
B. 11
hr
C. 10 hr
D. 9
hr
A steel pipe is being carried down a hallway 14 ft wide. At the end of the hall there is a right-angled turn into a narrower hallway 7 ft wide. What is the length of the longest pipe that can be carried horizontally around the corner?
