Solve the problem.A certain radioactive isotope decays at a rate of 1% per 500 years. If t represents time in years and y represents the amount of the isotope left, use the condition that 
to find the value of k in the equation 
A. -0.01005
B. 0.00538
C. 0.00002
D. -0.00002
Answer: D
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Solve the problem.A ball is dropped from a height of 15 m and always rebounds 
of the height of the previous drop. How far does it travel (up and down) before coming to rest?
A. 45 m B. 90 m C. 75 m D. 30 m
Evaluate the expression.C(4, 0)
A. 4 B. 24 C. 1 D. 0
Graph the linear equation by finding and plotting its intercepts.-4x - y = - 12
A. (0, -12), (3, 0)
B. (0, 12), (3, 0)
C. (0, -12), (-3, 0)
D. (0, 12), (-3, 0)
Solve the problem.Suppose that P0 is invested in a savings account in which interest is compounded continuously at 5.5% per year. That is, the balance P grows at the rate given by 
Suppose that $9000 is invested. When will the investment double?
A. 12.6 years B. 18.9 years C. 0.3 years D. 25.2 years