Solve the problem.Jeff starts driving at 45 miles per hour from the same point that Lauren starts driving at 40 miles per hour. They drive in opposite directions, and Lauren has a 
head start. How long will they be able to talk on their cell phones that have a 370-mile range?
A. 4.6 hours
B. 4.1 hours
C. 4.3 hours
D. 4.4 hours
Answer: B
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Fill in the blank with < or >.-1 
9
A. > B. <
Establish the identity.
= cos x + cot x
What will be an ideal response?
Solve the problem.An object is propelled vertically upward from the top of a 48-foot building. The quadratic function 
models the ball's height above the ground, 
in feet, t seconds after it was thrown. How many seconds does it take until the object finally hits the ground? Round to the nearest tenth of a second if necessary.
A. 11.3 seconds B. 0.3 seconds C. 2 seconds D. 5.5 seconds
Solve the problem.The velocity of a particle (in 
) is given by v = t2 - 6t + 2, where t is the time (in seconds) for which it has traveled. Find the time at which the velocity is at a minimum.
A. 6 s B. 2 s C. 3 s D. 1 s