Solve the polynomial inequality.(x + 10)(x - 9)(x + 9) ? 0
A. [-10, -9] ? [9, ?)
B. [-10, 9]
C. (-?, -9] ? [9, ?)
D. (-?, 9] ? [9, 10]
Answer: A
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Determine the amplitude or period as requested.Period of y = -5 cos 
x
A. 
B. 
C. 8?
D. -5
In a recent pretrial run for the world water speed record, the velocity of the Sea Falcon II t seconds after firing the booster rocket was given by
?
ft/sec. Find the distance covered by the boat over the 5-second period after the booster rocket was activated.
Hint: The distance is given by 
.
What will be an ideal response?
Solve the problem.The number of enrollees in health maintenance organizations (HMOs) in Illinois in a recent year was 2,418,130. This was a 40.6% increase over the previous year. What was the former number of enrollees?
A. 171,986 enrollees B. 687,946 enrollees C. 3440 enrollees D. 1,719,865 enrollees
Solve.The population P, in thousands, of Pine Grove is given by P(t) = 
, where t is the time, in months. Find the interval on which the population was 40 thousand or greater.
A. [0.942, 3.058] B. (-?, ?) C. [3.058, ?) D. [1.177, 3.823]