Solve the problem.As one approaches a certain sound source, the sound intensity in arbitrary units increases according to the following function of time: F(x) = - 
. Starting at x = 0, when the source of sound is first sensed, how much time elapses until maximum sound intensity is felt? Round the result to the nearest hundredth.
A. 2.07 sec
B. 26.07 sec
C. 14.77 sec
D. 0.36 sec
Answer: A
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Solve the problem.At a track meet, Russell ran the first heat of the 100-yd dash in 14.5 sec, Sergy in 14.8 sec, and Omar in 15.2 sec. In the second heat, they got 14.3 sec, 14.4 sec, and 14.7 sec. Write a 1 x 3 matrix giving the changes in times. If the changes repeat, who will win?
A. 
, Omar
B.
[0.2 0.4 0.5], Sergy
C.
[-0.2 -0.4 -0.5], Sergy
D.
[-0.2 -0.4 -0.5], Russell
Evaluate the expression.1 + (-25) + (-15)
A. 11 B. 41 C. -9 D. -39
Solve the problem.Determine a polynomial that represents the area of the figure.
A. 6x2 + 3 B. 3x2 + 11x + 6 C. 3x2 + 6 D. 6x2 + 11x + 3
Use the position equation 
, where 
represents the height of an object (in feet),
src="https://sciemce.com/media/3/ppg__cognero__Section_2.7_Nonlinear_Inequalities__media__eea8077d-b158-4733-bf13-7559c41074f1.PNG" style="vertical-align:middle;" /> represents the initial velocity of the object (in feet per second), 
represents the initial height of the object (in feet), and t represents the time (in seconds).
A projectile is fired straight upward from ground level 
with an initial velocity of 176 feet per second. At what instant will it be back at ground level?
?
A. 
Sec
B. 
Sec
C. 
Sec
D. 
Sec
E. 
Sec