At one high school, students can run the 100-yard dash in an average of 15.2 seconds with a standard deviation of 0.9 seconds. The times are very closely approximated by a normal curve. Find the percent of times that are:Between 17 and 17.9 seconds
A. 2%
B. 16%
C. .5%
D. 13.5%
Answer: A
Mathematics
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A. n = 
B. n = 
C. n = 
D. n = 
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Simplify. Assume that any variables are positive.
A. 
B. 
C. 
D. 21
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The pendulum on a grandfather clock swings from side to side once every second. If the length of the pendulum is 4 feet and the angle through which it swings is 23°, how far does the tip of the pendulum travel in 1 second? ? If the answer needs rounding, round it to three significant digits. ? __________ feet
What will be an ideal response?
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Add or subtract. Simplify the answer.
+ 
A. 
B. 
C. 
D. 
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