Use the given table to find the indicated probability.People in a survey were given three choices of soft drinks and asked to choose one favorite. The following table shows the results.
One of the participants is selected at random. Find the probability that the person is over 40 given that they prefer root beer.
A. 
B. 
C. 
D. 
Answer: D
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Convert to an exponential equation.log10 15 = 1.1761
A. 1015 = 1.1761 B. 101.1761 = 15 C. 151.1761 = 10 D. 1.176110 = 15
State whether the parabola opens upward or downward.f(x) = -0.7x2 + 8
A. Upward B. Downward
Solve the problem.A person coughs when a foreign object is in the windpipe. The velocity of the cough depends on the size of the object. Suppose a person has a windpipe with a 
radius. If a foreign object has a radius r, in mm, assume that the velocity V, in mm/second, needed to remove the object by a cough is given byV(r) = k(23r2 - r3), 0 ? r ? 23, where k is some positive constant. For what size object is the maximum velocity needed to remove the object? Round answer to the nearest tenth, if necessary.
A. 16.3 B. 11.5 C. 7.7 D. 15.3
Simplify.-|-11| - |-11 - 8|
A. -8 B. 30 C. 8 D. -30