The distribution of the math SAT test scores at a local college is approximately Normal (450, 100) .
(a) What is the percentage of the scores is below 400?
(b) What is the percentage of the scores is above 600?
(a) 0.3085
(b) 0.0668
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Solve.The function h(t) = -16t2 + 160t - 384 gives the height h, in feet, of a flare fired from the bottom of a gorge 
deep with an initial velocity of 
The flare fired is visible only when it is above the rim. During what interval can the flare be seen?
A. 4 < t < 6 B. 8 < t < 10 C. 12 < t < 14 D. 0 < t < 4
Find the exact area under the curve between the indicated values of x.y = x2 + 1; between x = 0 and x = 1
A. 
B. 
C. 
D. 
Determine whether the statement is true or false.A trapezoid is also a quadrilateral.
A. True B. False
Solve the problem.Frank can type a report in 8 hours. James takes 5 hours to type it. How long will it take the two of them typing together?
A. 
hr
B. 
hr
C. 
hr
D. 
hr