Factor.2n2 + 5n - 63
A. (2n - 9)(9 - 2n)
B. (2n - 72)(2n - 9)
C. (2n - 9)(n + 7)
D. (2n - 9)(n - 7)
Answer: C
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Solve the formula for the indicated variable. Then use the supplied values to solve the equation.The total surface area of a rectangular solid of length L, width W, and height H is given by 
Solve for H. What is the height if the area A is 2768 cm2, the length is 35.5 cm, and the width is 12.9 cm? (All measurements are approximate.)
A. H = A - 2LW - 2L - 2W = 1760 cm
B. H = 
= 1160 cm
C. H = 
= 47.7 cm
D. H = 
= 19.1 cm
Solve.The population of a particular country was 23 million in 1982; in 1996, it was 33 million. The exponential growth function 
describes the population of this country t years after 1982. Use the fact that 14 years after 1982 the population increased by 10 million to find k to three decimal places.
A. 0.026 B. 0.474 C. 0.164 D. 0.036
Solve.Two plumbers make house calls. One charges $90 for a visit plus $40 per hour of work. The other charges $70 per visit plus $50 per hour of work. For how many hours of work do the two plumbers charge the same?
A. 2 hr B. 2.5 hr C. 1.5 hr D. 1 hr
Rationalize the denominator.
A. 
B. 
C. 
D. 