Solve the logarithmic equation.

a)1n x - 1n (x-8) = 1n 7

Solve the exponential equation. Round your answer to four decimal places.

a) 8^x+5=2^x

Find the logarithm using the change-of-base formula. Round your answer to four decimal places.

a) log3(lower 3, did not know how to put that on here)0.656

Multiple Choice. How long will take an intial investment of $11,000 to grow to $21,000 at an interest rate of 6.3% compounded continuously?

A) 10.26 yr B) 1.03 yr C) 10.18 yr D) 9.95 yr