Solve.When a ball with coefficient of restitution e is dropped from a height h meters onto a large flat surface, the time t from the first impact until the ball stops bouncing is given by t = 
seconds. Find the time it takes a ball with coefficient of restitution 0.21 to stop bouncing if it is dropped from a height of 67.1 centimeters. (Round to the nearest tenth.)
A. 1.9 seconds
B. 18.7 seconds
C. 27.8 seconds
D. 2.8 seconds
Answer: A
Mathematics
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Solve the equation.x - 
= - 
A. 
B. 
C. 
D. 
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Determine whether the lines are perpendicular. Use a protractor.
A. Yes B. No
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Find the expected value.Suppose that 1,000 tickets are sold for a raffle that has the following prizes: one $300 prize, two $100 prizes, and one hundred $1 prizes. What is expected value of a ticket?
A. $300 B. $0.60 C. $1 D. $100
Mathematics
Solve the problem.The graph shows an idealized linear relationship for the average monthly payments (in dollars) to retirees from 2000 through 2004. Use the midpoint formula to estimate the payment for 2002. Average Monthly Payments to Retirees 
a = $452; b = $496
A. $500 B. $22 C. $496 D. $474
Mathematics