Solve the problem. Round your answer, if appropriate.The volume of a sphere is increasing at a rate of 5 cm3/sec. Find the rate of change of its surface area when its volume is 
cm3. (Do not round your answer.)
A. 
cm2/sec
B. 
cm2/sec
C. 
cm2/sec
D. 10? cm2/sec
Answer: C
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The following question refers to a country with five states. There are 240 seats in the legislature, and the populations of the states are given in the table below.
Under Webster's method, the apportionments to each state are
A. State A: 11; State B: 19; State C: 109; State D: 97; State E: 4. B. State A: 10; State B: 19; State C: 110; State D: 97; State E: 4. C. State A: 10; State B: 18; State C: 110; State D: 98; State E: 4. D. State A: 10; State B: 19; State C: 111; State D: 97; State E: 3. E. none of these
If possible, evaluate the expression by hand. If not, approximate the answer to the nearest hundredth.5-2
A. 
B. 25
C. -25
D. 
Solve the problem.The logistic growth model 
represents the proportion of the total market of a new product as it penetrates the market t years after introduction. When will the product have 65% of the market?
A. 4.33 years B. 3.09 years C. 2.09 years D. 3.33 years
Solve the problem.A person puts $30 into a bank account on January 1, $40 on February 1, $50 on March 1, and so forth. How much has the person put into the bank account by December 30?
A. $840 B. $1080 C. $2040 D. $1020