Write the phrase as a variable expression. Use x to represent "a number."The total of 138 and a number
A. 138 - x
B. 138
C. 138x
D. 138 + x
Answer: D
Mathematics
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Evaluate the integral by making a substitution and then using a table of integrals. 
A. 4 sin-1
- 
+ C
B. 4 sin-1
- 
+ C
C. 
- 2 ln
+ C
D. 4 sin-1
+ x
+ C
Mathematics
Find the values of x for which the expression is a real number.
A. 
? 
B. 
? 
C. 
D. 
Mathematics
Find the vertical asymptotes, if any, of the graph of the rational function.f(x) = 
A. x = 7, x = 6 B. x = 7, x = 6, x = - 81 C. x = - 81 D. x = -7, x = -6
Mathematics
The costC of a loaf of bread at a particular bakery was $0.70 in 1990. In 2002 the cost was $2.75 per loaf. Assuming the exponential-growth model applies:
(a) Find the exponential-growth rate, and write the equation. (b) Find the cost of a loaf of bread at this bakery in 2020.
Mathematics