Solve the problem.The function f(x) = 600(0.5)x/90 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. Find the amount of radioactive material in the vault after 
Round to the nearest whole number.
A. 378 pounds
B. 200 pounds
C. 212 pounds
D. 450 pounds
Answer: A
Mathematics
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Use logarithmic differentiation to find the derivative of y.y = 
A. 
+ 
- 
B. 
C. ln x + 
ln(x5 + 4) - 
ln(x - 2)
D. 
Mathematics
Solve the problem.Two angles are said to be complementary if their sum is 90°. If one angle measures 
degrees, find the measure of its complement.
A. (
)°
B. 51°
C. 39°
D. (
)°
Mathematics
Find a polynomial of degree 3 with real coefficients that satisfies the given conditions.Zeros of -3, -1, 4 and P(2) = 5
A. P(x) = - 
- 
- 2
B. P(x) = 
- 
- 2
C. P(x) = 
+ 
- 2
D. P(x) = - 
+ 
+ 2
Mathematics
Multiply.
? 
A. 
B. 
C. 
D. 
Mathematics