Determine the principal value without using a calculator.- 
A. 
B. Not a real number
C. - 
D. - 
Answer: C
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Simplify the difference quotients 
and 
for the following function. Rationalize the numerator when necessary.f(x) = 
A. 
; 
B. - 
; - 
C. 
; 
D. - 
; - 
Use the table to solve the problem. Round to the nearest cent.
John Lee's savings account has a balance of $282. After 9 years, what will the amount of interest be at 5% compounded semiannually?
A. $157.82 B. $155.47 C. $70.18 D. $126.90
Solve the problem.Find the cost function if the marginal cost function is C'(x) = 10x - 7 and the fixed cost is $12.
A. C(x) = 10x2 - 7x + 12 B. C(x) = 5x2 - 7x + 11 C. C(x) = 5x2 - 7x + 12 D. C(x) = 10x2 - 7x + 11
Write an algebraic expression for the specified quantity.Allison can clean the house in 8 hours working alone. Joel can do the job in 3 hours working alone. 
it takes Allison and Joel to clean the house working together. Write an algebraic expression in t for (i) the portion of the job completed by Allison in t hours; (ii) the portion of the job completed by Joel in t hours.
A. (i) Allison: 
+ t
(ii) Joel: 
+ t
B. (i) Allison: 
t
(ii) Joel: 
t
C. (i) Allison: 
t
(ii) Joel: 
t
D. (i) Allison: 
t
(ii) Joel: 
t