Solve the problem.The function f(x) = 800(0.5)x/100 models the amount in pounds of a particular radioactive material stored in a concrete vault, where x is the number of years since the material was put into the vault. Find the amount of radioactive material in the vault after 
Round to the nearest whole number.
A. 1333 lb
B. 79 lb
C. 120 lb
D. 650 lb
Answer: D
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Solve for x.logaax = 279
A. a279 B. 279 logaa C. 279 D. 1
Use the compound interest formula to compute the future value of the investment. Round to the nearest cent.$900 at 2% compounded monthly for 15 months
A. $901.88 B. $922.76 C. $922.56 D. $1211.28
Solve the problem.Some functions have the set of complex numbers for their domain. These functions play a role in fractal geometry, which is important in nature and art. If the function 
find 
A. -3 + 12i B. -11 + 20i C. -8 + 12i D. -3 + 7i
Solve the problem.During a hurricane evacuation from the east coast of Georgia, a family traveled 
west. For part of the trip, they averaged 
but as the congestion got bad, they had to slow to 
If the total time of travel was 8 hours, how many miles did they drive at the reduced speed?
A. 108 mi B. 118 mi C. 103 mi D. 113 mi