Find the unknown number in the proportion. Write your answer as a whole number or a mixed number if possible.
= 
A. 
B. 
C. 4
D. 17
Answer: D
Mathematics
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Find the standard deviation. Round to the nearest tenth.19, 13, 10, 11, 7, 5, 20, 11, 11, 21
A. 5.1 B. 5.0 C. 1.4 D. 5.5
Mathematics
Solve the problem.Suppose that the demand and price for a certain model of graphing calculator are related by 
where p is the price (in dollars) and q is the demand (in hundreds). Find the price if the demand is 100 calculators.
A. $86.75 B. $67.50 C. $102.50 D. $83.25
Mathematics
Decide whether or not the functions are inverses of each other.f(x) = 
, g(x) = 
A. Yes B. No
Mathematics
Evaluate the function at the given value of the independent variable and simplify.f(x) = 
;f(2)
A. 
B. 
C. 
D. 
Mathematics