Use the formulas for measuring sounds to find the missing value. 
The intensity I of a sound is given. Find the loudness L of the sound.I = 10-7 W/m2
A. L = 70 dB
B. L = 60 dB
C. L = 190 dB
D. L = 50 dB
Answer: D
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When a car makes an emergency stop on dry pavement, it leaves skid marks on the pavement. The length L, in feet, of the skid marks is related to the speed S, in miles per hour, when the brakes were applied. The relationship is
.
A: Make a graph of S against L for skid mark lengths up to 200 feet.B: A man involved in an emergency stop claimed his speed was between 30 and 40 miles per hour. Add the horizontal lines represented by
and 
to the graph you made in part A.C: What range of skid mark length would support the driver's claim? Round your answer to two decimal places/
What will be an ideal response?
Find the derivative.y = 5 - 9x2
A. -18x B. -18 C. 5 - 18x D. 5 - 9x
Evaluate the expression by hand. Variables represent any real number.
A. -5 B. 15 C. 5 D. -125
Solve.y3 - 10y2 + 9y = 0
A. 8, 1 B. 0, -9, -1 C. 0, 9, 1 D. 9, 1