Solve the problem.A deep sea diving bell is being lowered at a constant rate. After 10 minutes, the bell is at a depth of 500 feet. After 50 minutes the bell is at a depth of 1400 feet. What is the average rate of lowering per minute?
A. 28.0 ft per minute
B. 18.0 ft per minute
C. 0.04 ft per minute
D. 22.5 ft per minute
Answer: D
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The graph of a polar equation is given. Select the polar equation for the graph. 
A. r sin ? = -1 B. r = -2 cos ? C. r = -1 D. r = -2 sin ?
Add or subtract the rational numbers. Express the sum or difference as a rational number in lowest terms.
- 
A. 
B. - 
C. 
D. 
Perform the division.(12x9y7 + 36x4y4 + 42x6y2) ÷ (6x4y2)
A. 2x9y7 + 6x4y4 + 7x6y2 B. 12x5y5 + 36y2 + 42x2 C. 2x5y5 + 6y2 + 7x2 D. 2x5y7 + 6y4 + 7x2y2
For the problem below, ? is a central angle in a circle of radius r. Find the length of arc s cut off by ?. ? ?= 2, r = 6 inches. ? If the answer needs rounding, round it to three significant digits. ? s = __________ inches
Fill in the blank(s) with the appropriate word(s).