Rationalize the denominator. Assume all variables represent positive real numbers.
A. 
B. 
C. 
- 
D. 
Answer: D
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Enrollment at my college is increasing at a rate of 6% per year. What will be the total percentage increase after 8 years? Round your answer to two decimal places if necessary.
What will be an ideal response?
Solve the problem.A balloon in the shape of a sphere is deflating. Given that t represents the time, in minutes, since it began losing air, the radius of the balloon (in cm) is 
Let the equation V(r) = 
?r3 represent the volume of a sphere of radius r. Find and interpret (V ? r)(t).
A. (V ? r)(t) = 
?(23 - t)3; This is the volume of the air lost by the balloon (in cm3) as a function of time (in minutes).
B. (V ? r)(t) = 23 - 
?(23 - t)3; This is the volume of the air lost by the balloon (in cm3) as a function of time (in minutes).
C. (V ? r)(t) = 
?(23 - t)3; This is the volume of the balloon (in cm3) as a function of time (in minutes).
D. (V ? r)(t) = 
?(t - 23)3; This is the volume of the balloon (in cm3) as a function of time (in minutes).
Write an algebraic expression for the quantity. Let x represent the unknown value.Nine fewer than a number.
A. x - 9 B. 9 < x C. 9 - x D. x < 9
Solve.One end of a guy wire is attached to the top of a 27-foot pole and the other end is anchored into the ground 21 feet from the base of the pole. Find the length of the guy wire. Round to the nearest tenth of a foot.
21 feet
A. 34.9 ft B. 48.7 ft C. 34.2 ft D. 48 ft