Solve the problem.Bobby's subtotal at Scramble's Electronics is $18.98. The sales tax on these items is 
What was Bobby's total bill?
A. $19.72
B. $20.82
C. $20.72
D. $19.82
Answer: B
Mathematics
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Solve the equation.
= 12.5
A. b = -5.0 B. b = 9.5 C. b = 8.5 D. b = -37.5
Mathematics
Solve for the unknown number.y - 35 = 42
A. 50 B. 44 C. 77 D. 52
Mathematics
Find the value of the combination.C(7, 7)
A. 1,260 B. 1 C. 0.5 D. 5,040
Mathematics
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. 
$15,000 - $19,999
A. 0.07 B. 0.08 C. 0.05 D. 0.04
Mathematics