Simplify. Assume that all variables represent positive numbers.
A. 6y
B. 6
C. 6
D. 6y2
Answer: A
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Solve.For maximum benefit during exercise, one's heart rate should increase by 50% to 85% above resting heart rate. (a) Alice has a resting heart rate of 70 bpm (beats per minute). What would her heart rate be if she increased it by 80% during exercise? (b) Sahill, who has a resting heart rate of 68 bpm , increased it to 119 bpm. By what percent did he increase his resting heart rate?
A. (a) 126 bpm, (b) 85% B. (a) 116 bpm, (b) 85% C. (a) 116 bpm, (b) 75% D. (a) 126 bpm, (b) 75%
Find the least common multiple (LCM) of the pair of numbers.7 and 21
A. 147 B. 7 C. 21 D. 28
Provide an appropriate response.Fill in the blank with "always greater than," "sometimes greater than," "always less than," or "cannot be determined," whichever response is correct. When dividing a positive fraction by 
, the answer is 
the fraction.
A. always greater than B. always less than C. sometimes greater than D. cannot be determined
Evaluate using integration by parts.
dx
A. 
x4(ln 4x)2 + 39x4 ln 4x - 
x4 + C
B. 
x4(ln 4x)2 - 39x3 ln 4x + C
C. 
x4(ln 4x)2 - 
x4 ln 4x + 
x4 + C
D. 
x4(ln 4x)2 - 39x4 ln 4x + 
x4 + C