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 8th 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
for with a calculator. Generalize the method you found in part (c).