Solve the problem.The table lists how financial aid income cutoffs (in dollars) for a family of four have changed over time. Use the midpoint formula to approximate the financial aid cutoff for 1985.
A. $34,250
B. $20,500
C. $53,500
D. $17,750
Answer: A
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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. 58.08 mm3/mm B. 5.81 mm3/mm C. 0.26 mm3/mm D. 0.5808 mm3/mm
Use a proportion to solve the problem.It is recommended that there be at least 10.4 square feet of floor space in a classroom for every student in the class. Find the minimum floor space that 40 students require. Round to the nearest tenth if necessary.
A. 384.6 ft2 B. 26.0 ft2 C. 416 ft2 D. 10.4 ft2
Solve and check. Use the square root principle to eliminate the square.(2m - 3)2 = 49
A. 2, -5 B. 5, -2 C. 10, -4 D. no real solution
Find all rational zeros.f(x) = 12x3 + 49x2 + 3x - 4
A. 
B. 
C. {- 3, -4, -4}
D. {- 3, 4, -4}