Solve the problem.How long will it take a sample of radioactive substance to decay to half of its original amount, if it decays according to the function A(t) = 400e-.169t, where t is the time in years? Round your answer to the nearest hundredth year.
A. 35.45 yr
B. 39.55 yr
C. 67.60 yr
D. 4.10 yr
Answer: D
Mathematics
You might also like to view...
Find the distance between points P1 and P2.P1(2, 7, 3) and P2(3, 8, 2)
A. 3
B. 9
C. 2
D. 
Mathematics
Find the finance charge on the revolving charge account. Assume interest is calculated on the unpaid balance of the account. Round to the nearest cent.Unpaid Balance Monthly Interest Rate$2,777.96 1.5%
A. $20.83 B. $38.89 C. $41.67 D. $416.69
Mathematics
Simplify the expression.
?
?
A. 2 B. 4 C. 6 D. 3 E. none of these
Mathematics
Graph the equation by plotting points.y = 
A. 
B. 
C. 
D. 
Mathematics