Solve.A rock falls from a tower that is 416 ft high. As it is falling, its height is given by the formula 
How many seconds will it take for the rock to hit the ground (h=0)?
A. 20.4 s
B. 5.1 s
C. 20 s
D. 10,816 s
Answer: B
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Solve the problem.The tuning frequency f of an electronic tuner is inversely proportional to the square root of the capacitance C in the circuit. If 
for 
find how fast f is changing at this frequency if 
A. -120 pF/s B. -47.9 pF/s C. 364 pF/s D. -95.8 pF/s
Solve the problem.Surveyors use the "link" as a unit of measure. To convert links to inches, multiply the number of links by 7.92. Create a function, f(x), that converts x links to inches.
A. f(x) = 
B. f(x) = 7.92x
C. f(x) = 
D. f(x) = x + 7.92
Find the angle between vectors v and w. Round the answer to the nearest tenth of a degree.v = 8i - 4j, w = 2i - 6j
A. 35.7° B. 104.5° C. 92.0° D. 45.0°
Evaluate the expression.-
- 
A. 19 B. -19 C. 11 D. -11