Estimate the answer to the problem.A mobile library has 1078 books in its collection. If there are 22 shelves in the library, then how many books, on average, are stacked on each shelf?
A. 60 books
B. 46 books
C. 55 books
D. 50 books
Answer: D
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Solve the problem.A cubic salt crystal expands by accumulation on all sides. As it expands outward find the rate of change of its volume with respect to the length of an edge when the edge is 
A. 0.6075 mm3/mm B. 0.27 mm3/mm C. 60.75 mm3/mm D. 6.08 mm3/mm
Perform the indicated operations and simplify the result. Leave the answer in factored form.
A. 7
B. 21
C. 
D. 3x + 17
Perform the indicated operation.(3x2 - xy - y2) + (x2 + 5xy + 6y2)
A. 4x2 + 6xy + 7y2 B. 2x2 - 6xy - 7y2 C. 4x2 + 4xy + 5y2 D. 3x2 + 5xy + 6y2
Solve the problem.A construction company uses the function S(t) = 28,000 - 2000t to determine the salvage value S(t) of their trucks t years after it is purchases. What was the initial value of the truck and how long until it depreciates completely?
A. $28,000; 28 years B. $30,000; 15 years C. $20000; 14 years D. $28,000; 14 years