Solve the problem.Exposure to ionizing radiation is known to increase the incidence of cancer. One thousand laboratory rats are exposed to identical doses of ionizing radiation, and the incidence of cancer is recorded during subsequent days. The researchers find that the total number of rats that have developed cancer t months after the initial exposure is modeled by 
for 
months. Find the rate of growth of the number of cancer cases at the 7th month.
A. 22.9 cases/month
B. 13.9 cases/month
C. 18.9 cases/month
D. 132.5 cases/month
Answer: C
Mathematics
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Evaluate the limit if one exists.
A. 9
B. Does not exist
C. 0
D. - 
Mathematics
Use the shell method to find the volume of the solid generated by revolving the region bounded by the given curves and lines about the x-axis.x = 3y2, x = 3
A. 
?
B. 
?
C. 1?
D. 
?
Mathematics
Fill in the blank with one of the words or phrases listed below.
The sign "<" means 
and ">" means 
.
A. is less than, is greater than B. negative, positive C. positive, negative D. is greater than, is less than
Mathematics
Match the equation to its graph.y = 2(x - 2) + 5
A. 
B. 
C. 
D. 
Mathematics