Solve the problem.A baker can decorate the day's cookie supply four times as fast as his new assistant. If they decorate all the cookies working together in 28 minutes, how long would it take for each of them to decorate the cookies working individually?
A. baker: 8
minutes
assistant: 33 minutes
B. baker: 140 minutes
assistant: 560 minutes
C. baker: 140 minutes
assistant: 35 minutes
D. baker: 35 minutes
assistant: 140 minutes
Answer: D
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Perform the indicated operations.
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A. - 
B. - 
C. - 
D. 
Solve the problem.The formula P = 14.7e-0.21x gives the average atmospheric pressure, P, in pounds per square inch, at an altitude x, in miles above sea level. Find the average atmospheric pressure for an altitude of 2.3 miles. Round your answer to the nearest tenth.
A. 11.0 lb/in.2 B. 7.8 lb/in.2 C. 9.1 lb/in.2 D. 8.4 lb/in.2
Graph the sinusoidal function using key points.y = cos x - 2
A. 
B. 
C. 
D. 
Find the standard form of the equation of the sphere with the given characteristics.
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Center: 
; radius: 1
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A. 
B. 
C. 
D. 
E. 