Solve the problem.John owns a hot dog stand. He has found that his profit is given by the equation 
where x is the number of hot dogs sold. How many hot dogs must he sell to earn the most profit?
A. 41 hot dogs
B. 23 hot dogs
C. 40 hot dogs
D. 47 hot dogs
Answer: C
Mathematics
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Solve the problem.How long will it take for the population of a certain country to double if its annual growth rate is 2.2%? (Round to the nearest year.)
A. 14 years B. 32 years C. 1 year D. 91 years
Mathematics
Provide an appropriate response.The equation 
+ 
= 2 has exactly how many roots?
A. none B. one C. two D. three E. four
Mathematics
Add. Do not use a number line except as a check.-2 + 4
A. -2 B. 6 C. 2 D. -6
Mathematics
Find the value of the expression.Let logb A = 5 and logb B = -4. Find logb B2.
A. -8 B. -16 C. 10 D. 16
Mathematics