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) = 550e-0.065t, where t is the time in years? Round to the nearest hundredth year.
A. 107.74 years
B. 35.75 years
C. 10.66 years
D. 97.08 years
Answer: C
Mathematics
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A. -63x4 - 90 B. -153x4 C. -63x8 - 90x4 D. -63x8 - 10
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Solve the problem.A bag contains 6 red marbles, 3 blue marbles, and 1 green marble. What is the probability of choosing a marble that is not blue when one marble is drawn from the bag?
A. 7
B. 
C. 
D. 
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Differentiate.y = (x2 - 2x + 5) ex
A. (x2 + 3) ex
B. 
ex
C. (x2 + 4x + 3) ex
D. (2x - 2) ex
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Translate the following statement into an algebraic expression or equation. ? Twenty percent of the list price L. ?
A. 
B. ?0.2 L
C. ?
D. ?
E. 0.2
?
Mathematics