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:At most 14.3 seconds
A. 16%
B. 13.5%
C. 50%
D. 84%
Answer: A
Mathematics
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Determine if the sequence is monotonic and if it is bounded.an = 
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Find a point-slope form for the equation of the line satisfying the conditions.Passing through (-8, -2) and (-5, 6)
A. y = 
(x + 8) - 2
B. y = 2(x + 
) + 8
C. y = -2(x - 
) - 8
D. y = - 
(x - 8) + 2
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Write the number as the product of a real number and i.- 
A. 4i
B. 4
C. -4i
D. i
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Find the center (h, k) and radius r of the circle. Graph the circle.x2 + y2 - 8x - 2y - 19 = 0 
A. (h, k) = (4, -1); r = 6
B. (h, k) = (4, 1); r = 6
C. (h, k) = (-4, 1); r = 6
D. (h, k) = (-4, -1); r = 6
Mathematics