2=(1+r/100n)^nt T=yr R=%

Write this exponential statement in logarithmic form for an investment at 15% quarterly. Then use change to base to find double time in yr.

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.