Solve the problem.Jim has gotten scores of 82 and 65 on his first two tests. What score must he get on his third test to keep an average of 80 or better?
A. at least 73.5
B. at least 91
C. at least 75
D. at least 93
Answer: D
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Use integration by parts to establish a reduction formula for the integral.
A. 
= xn ex - n 
B. 
= xn ex - n 
C. 
= xn ex + n 
D. 
= xn ex - 
Solve the problem.Use the formula D = 10.0 log (S/S0), where the loudness of a sound in decibels is determined by S, the number of watt/m2 produced by the soundwave, and S0 = 1.00 × 10-12 watt/m2. What is the intensity in watt/m2 of a noise measured at 76 decibels? (Round to an appropriate number of significant digits.)
A. 4.0 × 10-4 watt/m2 B. 4.0 × 10-5 watt/m2 C. 2.0 × 1015 watt/m2 D. 7.6 × 10-10 watt/m2
Write the expression as one term. Evaluate if possible.log 18 - log 6
A. 12 B. 3 C. log 3 D. log 12
Find the nth term an of the geometric sequence.an = 
; 1, - 
, 
, . . . .
A. n = 11 B. n = 6 C. n = 8 D. n = 13