Solve the problem.John owns a hot dog stand. His profit, in dollars, is given by the function 
where x is the number of hot dogs sold. What is the most he can earn?
A. $99
B. $49
C. $120
D. $106
Answer: D
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Compute the compound interest.Binal Patel invested $6000 at 4% compounded semiannually. How much will be in the account in 10 years? Round to the nearest cent.
A. $13,146.74 B. $8881.47 C. $8915.68 D. $7313.97
Determine whether the equation has no solution, one solution, or infinitely many solutions.65 = 8x - 7
A. One solution B. Infinitely many solutions C. No solutions
Add the polynomials. Express your answer in standard form.(14mn4 + 3m2n2 + n4) + (2m2n2 - 7n4 - 6mn4)
A. 20mn4 - 5m2n2 - 6n4 B. 20mn4 + 5m2n2 + 6n4 C. 8mn4 + 5m2n2 - 6n4 D. 8mn4 + 5m2n2 - 8n4
The table shows, for some particular year, a listing of several income levels and, for each level, the proportion of the population in the level and the probability that a person in that level bought a new car during the year. Given that one of the people who bought a new car during that year is randomly selected, find the probability that that person was in the indicated income category. Round your answer to the nearest hundredth. 
$40,000 - $49,999
A. 0.25 B. 0.21 C. 0.17 D. 0.22