Factor completely. If the polynomial is prime, then state this as your answer.21x2 - 91x - 70
A. prime
B. 7(3x + 2)(x - 5)
C. 7(3x - 2)(x + 5)
D. (21x + 14)(x - 5)
Answer: B
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Use l'Hopital's Rule to evaluate the limit.
A. ? B. 0 C. 1 D. -1
Solve the problem.Convert 18°F to Celsius. Use the formula C = 
(F - 32). Round to the nearest tenth if necessary.
A. 64.4°C B. 22.0°C C. 0.4°C D. -7.8°C
Use the MACRS depreciation rates table to find the recovery percent (rate), given the recovery year and recovery period.MACRS Depreciation Rates 
Recovery year:4Recovery period:27.5 years
A. 3.636% B. 6.177% C. 3.637% D. 1.818%
Solve the problem using the quadratic formula.For a car traveling at x mph, stopping distance is estimated by the formula d(x) = 
x2 + 
x. Find a (maximum) safe speed for a stopping distance of 630 ft. Round your answer to the nearest mph.
A. 65 mph B. 70 mph C. 73 mph D. 61 mph