Factor the trinomial completely.-25x2 + 30x + 16
A. -(5x - 2)(5x + 8)
B. (5x + 2)(5x + 8)
C. -(5x + 2)(5x - 8)
D. -(5x - 2)(5x - 8)
Answer: C
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Find the volume of the described solid.The base of a solid is the region between the curve y = 5cos x and the x-axis from x = 0 to x = ?/2. The cross sections perpendicular to the x-axis are squares with diagonals running from the x-axis to the curve.
A. 6?
B. 
?
C. 
?
D. 
?
Solve the initial value problem and leave the solution in implicit form.y'(x)
= 
, y(20) = 1
A. 
(y + 8)3/2 = 
(x - 4)3/2 - 37
B. (y + 8)3/2 = (x - 4)3/2 + 7
C. 
= 
- 1
D. (y + 8)3/2 = (x - 4)3/2 - 37
Solve the problem.The following map shows the states Illinois, Indiana, Kentucky, West Virginia, and Virginia. Find a route that starts and ends in Virginia and crosses each common state border exactly one time.
A. VA ? KY ? IL ? IN ? KY ? VA ? WV ? KY B. No such route exists. C. VA ? WV ? KY ? IL ? IN ? KY D. VA ? WV ? KY ? IN ? IL ? KY ? VA
Find the requested average, and round your answer as indicated.The table below shows the square footage of homes of a group of families. Find the average square footage and round to the nearest tenth. 
A. 7960.0 square feet B. 15,929.0 square feet C. 9986.3 square feet D. 9986.4 square feet