Solve the problem.Acetone is a solvent frequently used to clean lubricants from machine components. Once used, the dirty solvent need not be discarded. It may be distilled to recover pure acetone from the soiled mixture. During a distillation cycle, 71% of the acetone can be recovered. Calculate the effective volume of 1 liter of acetone. [The effective volume is the original 1 liter plus the accumulated amount recovered from an infinite number of distillation cycles].
A. 3.448 L
B. 1.710 L
C. 1.408 L
D. An infinite number of liters
Answer: A
Mathematics
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Solve the problem.If a rock is thrown vertically upward from the top of a building 80 feet high with an initial velocity of 64 feet per second, the height, h, above ground level after t seconds is given by h = -16t2 + 64t + 80, where h is in feet and t is in seconds. How many seconds will it take the rock to hit the ground?
A. 1 sec B. 2 sec C. 5 sec D. 4 sec
Mathematics
Multiply the expressions.(8a - 1)2
A. 8a2 + 1 B. 8a2 - 16a + 1 C. 64a2 - 16a + 1 D. 64a2 + 1
Mathematics
Add or subtract. Express the answer as a mixed number.11 - 3
A. 10
B. 7
C. 8
D. 8
Mathematics
Simplify the expression.
? 
A. 
B. 
C. 
D. 
Mathematics