Solve.The function A = A0e-0.01155x 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 500 pounds of the material are placed in the vault, how much time will need to pass for only 79 pounds to remain?
A. 165 years
B. 320 years
C. 160 years
D. 170 years
Answer: C
Mathematics
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Find all the first order partial derivatives for the following function.f(x, y) = 7x - 4y2 - 2
A. 
= 5; 
= -8y - 2
B. 
= -8y; 
= 7
C. 
= 7; 
= -8y
D. 
= 7x; 
= -8y
Mathematics
Write a signed number for the statement.$2965 out of debt
A. 2965 B. -2965
Mathematics
Insert <, >, or = to form a true statement.0.3 
0.0563
A. > B. = C. <
Mathematics
Find all numbers that are not in the domain of the function. Then give the domain using set notation.f(x) = 
A. 3; {
x ? 3}
B. 7; {
x ? 7}
C. none; (-?, ?)
D. 0; {
x ? 0}
Mathematics