Use a calculator to choose the equation whose graph is shown.
A. r = 3 sin ?
B. r = 
C. r = 
D. r = 
Answer: B
Mathematics
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Solve the problem.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 431 pounds to remain?
A. 80 yr B. 140 yr C. 70 yr D. 75 yr
Mathematics
Convert as indicated.7.2 ml to deciliters
A. 72 dl B. 0.072 dl C. 0.72 dl D. 720 dl
Mathematics
Perform the indicated operation and, if possible, simplify.
? 
A. 
B. 
C. 
D. 
Mathematics
Factor completely.8x6 - 20x3 + 10x3 - 25
A. (4x6 + 5)(2x - 5) B. (4x3 + 5)(2x3 - 5) C. (8x3 - 5)(x3 + 5) D. (4x3 - 5)(2x3 + 5)
Mathematics