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 normally distributed.Find the percent of times that are below 17 seconds.
A. 84%
B. 98%
C. 2.5%
D. 97.7%
Answer: D
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Factor completely. If unfactorable, indicate that the polynomial is prime.3x2(x - 4) + 24x(x - 4) + 45(x - 4)
A. 3(x + 3)(x + 5)(x - 4) B. (x - 4)(-4x + 9)(x + 5) C. (x - 4)(3x + 15)(x + 3) D. 3(x - 4)(x - 3)(x + 5)
Write a formula for the nth term of the given geometric sequence. Do not use a recursion formula.
, 
, 
, 
, ...
A. an = 
- 
(n - 1)
B. an = 
+ 
(n - 1)
C. an = 
n - 1- 
D. an = 
n - 1
Graph the hyperbola.y2 - 
= 1
A. 
B. 
C. 
D. 
The loudness of a sound of intensity x, measured in watts per square meter, is defined as L(x) = log (
), where xo = 10-3.A particular Boeing 747 jetliner produces noise at a loudness level of 113 decibels. Find the intensity level (round to the nearest hundredth) in watt per square meter for this noise.
What will be an ideal response?