Solve the problem.From a point on a river, two boats are driven in opposite directions, one at 8 miles per hour and the other at 13 miles per hour. In how many hours will they be 42 miles apart?
A. 3 hr
B. 2 hr
C. 4 hr
D. 1 hr
Answer: B
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Find the probability.A bag contains 6 cherry, 3 orange, and 2 lemon candies. You reach in and take 3 pieces of candy at random. What is the probability that you have at least 2 cherry candies? Round to the nearest ten-thousandth.
A. 0.3362 B. 0.1515 C. 0.5758 D. 0.4909
Find the measure of the dihedral angle indicated.The figure shown is a right prism whose bases are regular hexagons. Find the measure of the dihedral angle between each lateral face and a base.
A. 90° B. 135° C. 60° D. 120°
Solve the problem.In 2012, a certain country recovered 26% of its municipal solid wastes through recycling, up from 17% in 2007. Let P represent the percentage recycled and t the number of years since 2007. Find a linear equation for P as a function of t.
A. P = 1.8t + 24 B. P = 0.9t - 17 C. P = -1.8t + 7 D. P = 1.8t + 17
Find the inverse. Determine whether the inverse represents a function.{(6, 3), (8, 4), (6, 5), (4, 6)}
A. {(3, 6), (4, 8), (5, 6), (6, 4)}; a function B. {(4, 3), (3, 6), (6, 8), (4, 5)}; not a function C. {(3, 6), (4, 8), (5, 6), (6, 4)}; not a function D. {(4, 3), (6, 6), (6, 6), (4, 5)}; a function