Solve the problem.A(x) = -0.015x3 + 1.05x gives the alcohol level in an average person's blood x hrs after drinking 8 oz of 100-proof whiskey. If the level exceeds 1.5 units, a person is legally drunk. Would a person be drunk after 7 hours?
A. No
B. Yes
Answer: B
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Evaluate the expression by hand.81-3/2
A. 
B. - 
C. -729
D. 729
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. 
$20,000 - $24,999
A. .11 B. .08 C. .06 D. .07
Solve the problem.An experimental model for a suspension bridge is built in the shape of a parabolic arch. In one section, cable runs from the top of one tower down to the roadway, just touching it there, and up again to the top of a second tower. The towers stand 40 inches apart. At a point between the towers and 12 inches along the road from the base of one tower, the cable is 0.64 inches above the roadway. Find the height of the towers.
A. 6 in. B. 3.5 in. C. 4.5 in. D. 4 in.
Solve the exponential equation. 16x + 6 = 64x - 9
A. 21 B. 33 C. 39 D. 15