Solve the problem.Find the centroid of a hemispherical shell having outer radius 9 and inner radius 7 if the density is constant.
A. 
= 0, 
= 0, 
= 
B. 
= 0, 
= 0, 
= 
C. 
= 0, 
= 0, 
= 
D. 
= 0, 
= 0, 
= 
Answer: A
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Evaluate the cylindrical coordinate integral.
A. 64? B. 16? C. 8? D. 128?
Solve.Anita receives a promotional offer from a long-distance phone company of $0.05 per minute for long-distance calls. If she spends between $10 and $35 on long distance calls in the first month, the offer will be extended by an extra month. If she spends more than $35 in the first month, the offer will be extended by an additional two months. For what range of minutes must Anita use long distance in the first month, if the offer is to be extended by an extra month?
A. At least 200 min B. Between 200 min and 900 min C. Between 200 min and 700 min D. Between 100 min and 700 min
Describe the given distribution with a circle graph.The following figures give the economic distribution for 14,000 people who live in a certain county.
?
?
What will be an ideal response?
Solve the problem.A weather forecaster predicts that the temperature will drop 3 degrees each hour for the next 4 hours. If the temperature is 7 degrees before the temperature starts falling, what is the temperature after the drop?
A. -12° B. -5° C. 12° D. 0°