Solve the problem.A deep sea diving bell is being lowered at a constant rate. After 9 minutes, the bell is at a depth of 600 ft. After 30 minutes the bell is at a depth of 1300 ft. What is the average rate of lowering per minute? Round to the nearest hundredth is needed.
A. 33.3 ft per minute
B. 43.3 ft per minute
C. 23.3 ft per minute
D. 0.03 ft per minute
Answer: A
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A. 
B. 
C. 
D. 
Solve the problem.Two recording devices are set 2000 feet apart, with the device at point A to the west of the device at point B. At a point on a line between the devices, 300 feet from point B, a small amount of explosive is detonated. The recording devices record the time the sound reaches each one. How far directly north of site B should a second explosion be done so that the measured time difference recorded by the devices is the same as that for the first detonation?
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Convert the angle from radians to degrees. Express your answer as a decimal rounded to two decimal places.2
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