Multiply and simplify.
? 
A. 
B. 
C. 
D. 
Answer: C
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Solve the problem.Find the center of mass of the lamina in the first quadrant bounded by the coordinate axes and the curve 
if 
.
A. 
= 
, 
= 
B. 
= 
, 
= 
C. 
= 
, 
= 
D. 
= 
, 
= 
Solve the equation. Use a calculator where appropriate. If the answer is irrational, round to the nearest hundredth.log2 (20 - 4x) = 3
A. 
B. - 
C. -3
D. 3
A study conducted by Uni-Mart, a mail-order department store, reveals that the time intervals in minutes between incoming telephone calls on its toll-free 600 line between 9 A.M. and 2 P.M. are exponentially distributed with probability density function 
. What is the probability that the time interval between successive calls is more than 6 min? Round your answer to four decimal places.
?
A. 0.4899 B. ?0.8869 C. ?0.2950 D. ?0.1737 E. ?0.8981
Find the domain and range of the function represented in the graph.
A. Domain: [0, 2?]; Range: [0, 3] B. Domain: [-3, 3]; Range: [-?, 2?] C. Domain: [-?, 2?]; Range: [-3, 3] D. Domain: [?, 2?]; Range: [-4, 2]