At one high school, students can run the 100-yard dash in a mean of 15.2 seconds with a standard deviation of 0.9 seconds. The times are very closely approximated by a normal curve. Rounding to the nearest tenth of a percent as necessary, find the percent of times that are:At least 14.3 seconds
A. 16%
B. 50%
C. 13.5%
D. 84%
Answer: D
Mathematics
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Solve.A football team lost 9 yards on each of two consecutive plays. Represent the total loss as product of signed numbers and find the total loss.
A. 2 + (-9) = -7 yds; 7 yard loss B. 9 - 2 = 7 yds; 7 yard loss C. 2 ? (-9) = -20 yds; 20 yard loss D. 2 ? (-9) = -18 yds; 18 yard loss
Mathematics
Write decimal notation.- 
A. -0.60988 B. -0.060988 C. -6.0988 D. -60.988
Mathematics
Find the requested polynomial. Find a polynomial of degree 4 having the following zeros: 7 (multiplicity 2), 
, -
A. f(x) = x4 + 14x3 - 42x2 - 98x + 343 B. f(x) = x3 - 7x2 - 7x + 49 C. f(x) = x3 + 7x2 - 7x - 49 D. f(x) = x4 - 14x3 + 42x2 + 98x - 343
Mathematics
Simplify the expression.-5(x + 2) + 11x
A. 16x + 10 B. 6x + 10 C. -16x - 10 D. 6x - 10
Mathematics