Determine which value(s), if any, must be excluded from the domain of the variable in the expression.
A. x= -5
B. x = 0
C. x = 5
D. none
Answer: C
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If f satisfies the equation of change 
, and the initial value of f is 7.94, find a formula for the function 
.
?
A. 
B. 
C. 
D. 
Determine the number by which both sides of the equation must be multiplied or divided, as specified, to obtain just x on the left side.
x = 2; multiply by
A. 
B. - 
C. 2
D. 9
Find the average rate of change of the function on the given interval. f(x) = -5x + 5, [-5, -2]
A. -5 B. 4 C. 5 D. -6
Solve the problem.The function A = A0e-0.00866x 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. If 500 pounds of the material are placed in the vault, how much time will need to pass for only 115 pounds to remain?
A. 170 years B. 180 years C. 340 years D. 175 years