Precalculus Logarithms

In Table 1, when x=​ (a)   , y=8.

In Table 2, when x=12, y=​ (b)  

• 292

• 544

• .683

• 431

• 1

• 5

Consider the equation: 7 dot10^{0.5w}=20 Solve the equation for w. Express the solution as a logarithm in base-10. w=​ ​ Approximate the value of w. Round your answer to the nearest thousandth. w=​

• True, subtraction between two logarithms is division in condensed form.

• True, a logarithm is an exponent. When dividing like bases you subtract exponents therefor dividing logarithms as in this example.

• False, subtraction between two logarithms is division within a single logarithm in condensed form.

Use the change of base formula and your calculator to approximate the log.

• A

• B

• C

• D