Solve the problem.Suppose the consumption of electricity grows at 2.7% per year, compounded continuously. Find the number of years before the use of electricity has tripled. Round the answer to the nearest hundredth.
A. 40.69 yr
B. 111.11 yr
C. 4.07 yr
D. 0.41 yr
Answer: A
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Find the center of mass of a thin plate of constant density covering the given region.The region in the first and fourth quadrants enclosed by the curves 
and 
and by the lines 
and 
A. 
= 
, 
= 0
B. 
= 
, 
= 0
C. 
= 0, 
= 
D. 
= 
, 
= 0
Use a day counting table to find the exact number of days from the first date to the second date. Assume the year is not a leap year unless otherwise indicated.January 4 to November 5 (the year is not a leap year)
A. 309 B. 303 C. 305 D. 308
Find the exact value of the expression.tan 
A. -2 - 
B. 2 + 
C. 2 - 
D. 
- 2
Solve the following system by any appropriate method. If there is no real number solution, so state.
- 
= 1x + y = 7
A. (3, 4), (-17, 24) B. (3, 10), (-17, -10) C. (2, 3), (-16, 25) D. (2, 4), (-16, 24)