Solve the problem.The function A = A0e-0.01386x models the amount in pounds of a particular radioactive material stored in a concrete vault, where x is the number of years since the material was put into the vault. If 400 pounds of the material are initially put into the vault, how many pounds will be left after 140 years?
A. 312 lb
B. 57 lb
C. 560 lb
D. 71 lb
Answer: B
Mathematics
You might also like to view...
Find the volume of the solid generated by revolving the region about the given line.The region bounded above by the line 
, below by the curve 
, and on the right by the line 
, about the line 
A. 
?
B. 
?
C. 
?
D. 
?
Mathematics
Convert the polar equation to rectangular coordinates. r + cos? = 3
 figure 1.png)
Mathematics
Factor the polynomial completely.8x2 + 17x - 21
A. (x - 7)(8x + 3) B. (x - 3)(8x + 7) C. (x + 3)(8x - 7) D. prime
Mathematics
Solve the problem.A group of 9 friends are going to a concert. Tickets cost $14 each and they pay an additional $7 per person to upgrade their tickets to the front row. What is the total cost for all of their tickets?
A. $63 B. $882 C. $189 D. $199
Mathematics