At one high school, the mean time for running the 100-yard dash is 
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:More than 15.2 seconds
A. 48%
B. 34%
C. 68%
D. 50%
Answer: D
Mathematics
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Graph the line and give the domain and the range.y = 6
A. D = (-?, ?), R = {6}
B. D = {6}, R = (-?, ?)
C. D = (-?, ?), R = {6}
D. D = {6}, R = (-?, ?)
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Translate the phrase into a mathematical expression and then evaluate it.Twenty times five, plus one
A. 20 ? 5 - 1; 80 B. 20 ? 5 + 1; 101 C. 20 ? 5 - 1; 99 D. 20 ? 5 + 1; 120
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Solve and give interval notation for the solution set. Then graph the solution set.5 < 4y + 5 ? 21
A. (0, 4)
B. [0, 4]
C. [0, 4)
D. (0, 4]
Mathematics
Multiply.(10x2 - 3x)(10x2 + 3x)
A. 100x4 - 60x3 - 9x2 B. 100x4 - 9x2 C. 10x4 - 3x2 D. 100x4 + 60x3 - 9x2
Mathematics