Perform the division.
A. z2 + 4z + 16
B. z2 - 4z + 16
C. z2 + 4z - 16
D. z2 + 8z + 16
Answer: A
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Sketch the surface z = f(x,y).f(x, y) = 
A. 
B. 
C. 
D. 
If two fair dice, one red and one white, are rolled, in how many ways can the result be obtained?The product of the numbers on the two dice is a perfect square.
A. 5 ways B. 8 ways C. 6 ways D. 7 ways
Simplify. Do not use negative exponents in your answer.(a-5b-4)(a-4b-7)
A. 
B. 
C. 
D. 
Solve.The function A = A0e-0.00693x 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 700 pounds of the material are placed in the vault, how much time will need to pass for only 231 pounds to remain?
A. 320 years B. 160 years C. 170 years D. 165 years