Solve the problem. Use ? ? 3.14.A circular planetarium with a radius of 30 ft has 10 ft high walls and a dome ceiling in the shape of a hemisphere. How many cubic feet per minute must the air conditioner supply to change all the air in the room twice per hour? Round your answer to the nearest tenth.
A. 1413 ft3 per minute
B. 20,826 ft3 per minute
C. 1294.2 ft3 per minute
D. 2826 ft3 per minute
Answer: D
Mathematics
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Find the perimeter and the area of the figure.
A. perimeter: 121 ft; area: 44 sq ft B. perimeter: 44 ft; area: 121 sq ft C. perimeter: 22 ft; area: 121 sq ft D. perimeter: 44 ft; area: 484 sq ft
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Subtract.
- 9
A. 
B. 8
C. 10
D. 
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Solve the problem.For what numbers x, 0 ? x ? 2?, does cos x = 1?
A. 0, 2?
B. 
C. 
, 
D. none
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Solve the equation for the indicated variable.A = 
bh
for h
A. h = 
B. h = 
C. h = 
D. h = 
Mathematics