Solve the problem.A deep sea diving bell is being lowered at a constant rate. After 12 minutes, the bell is at a depth of 400 feet. After 30 minutes the bell is at a depth of 1600 feet. What is the average rate of lowering per minute? Round to the nearest hundredth if necessary.
A. 0.02 ft per min
B. 53.33 ft per min
C. 66.67 ft per min
D. 40 ft per min
Answer: C
Mathematics
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tan 45°
A. 
B. 
C. 
D. 1
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= 
What will be an ideal response?
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Use back-substitution to solve the system of linear equations.
?
?
A. ?
B. ?
C. ?
D. ?
E. ?
Mathematics