Solve the exponential equation. For irrational solutions, round to four decimal places.31 + 2x = 243

A. {-2}
B. {81}
C. {6}
D. {2}


Answer: D

Mathematics

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A. 88,488 B. 52,623 C. 51,623 D. 52,823

Mathematics

Provide an appropriate response. The intensity of an earthquake is measured on the Richter scale by the formula Richter scale rating = log , where I0 is the measure of the intensity of a very small earthquake. Use this formula to find the Richter scale rating of an earthquake having intensity 10,000,000I0.

A. 15 B. 6 C. 7 D. 16

Mathematics

Multiply. 

A. x2  + 
B. x2 - - 
C. x2 - + 
D. x2 - + 

Mathematics

Find an for the given geometric sequence.a1 = 2, r = -2

A. an = -2(2)n-1 B. an = 2(-2)n C. an = 2(-2)n-1 D. an = -2(2)n

Mathematics