### Home > CCA2 > Chapter 6 > Lesson 6.2.1 > Problem 6-99

6-99.

Consider the questions below.

What can you multiply

by to get ? What can you multiply

by to get? See part (a).

Using the rules of exponents, find a way to solve . Remember that logarithms will not be useful here, but the exponent key on your calculator*will*be. (Obtain the answer as a decimal approximation using your calculator. Check your result by raising it to the 8^{th}power.)On your calculator, raise 40 to the

power.

Many calculators require the parentheses for this step.Now solve

.Use the method you found in part (c).

Describe a method for solving

forwith a calculator.Generalize the method you found in part (c).