Solve the logarithmic equation. Be sure to reject any value that is not in the domain of the original logarithmic expressions. Give the exact answer.log5(5x - 7) = log5(2x + 5)
A. 
B. 
C. ?
D. {-2}
Answer: B
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Use properties of logarithms to expand the logarithmic expression as much as possible. Where possible, evaluate logarithmic expressions without using a calculator.log4
A. 6log4y - 3log4x
B. 3log4x + 6log4y
C. 
log4
D. 3log4x - 6log4y
Insert <, >, or = to make a true statement.0 
A. > B. < C. =
For the given probability density function, over the stated interval, find the requested value.f(x) = 
x2, over the interval [-2, 3]. Find E(x).
A. 
B. 
C. 
D. 
Solve the problem. Express the answer in scientific notation to two decimals unless requested otherwise.A computer can do one calculation in 1.4 × 10-7 seconds. How long would it take the computer to do a trillion (1012) calculations?
A. 1.4 × 105 sec B. 1.4 × 10-7 sec C. 1.4 × 106 sec D. 1.4 × 1012 sec