HW Solve Log Equations

Solve the equation. Make sure to check your answers for extraneous solutions.

If there is no solution, write: no solution

Write your answer as y=7 for example, or y=6,-6 if there is more than 1 solution.

Solve the equation. Make sure to check your answers for extraneous solutions.

If there is no solution, write: no solution

Solve the equation. Make sure to check your answers for extraneous solutions.

If there is no solution, write: no solution

Solve the equation. Make sure to check your answers for extraneous solutions.

If there is no solution, write: no solution

Solve the equation. Make sure to check your answers for extraneous solutions.

If there is no solution, write: no solution

Solve the equation. Make sure to check your answers for extraneous solutions.

If there is no solution, write: no solution

*Remember when you take the square root, you need \pm

Solve the equation. Make sure to check your answers for extraneous solutions.

If there is no solution, write: no solution

Solve the equation. Make sure to check your answers for extraneous solutions.

If there is no solution, write: no solution

(remember, if the base is not written, it is base "10")

A decibel scale represents how loud things are and is based on logarithms. For exampe, a quiet office is 30 dB, and a jet engine is 150+ dB. This is the formula for decibels:

You’re at a rock concert, and you measure the sound to be 140dB. What is the intensity (I) of the sound?

Units will be w/m^2 , but you don't need to put them.

This question goes with #9

If a home stereo has a sound intensity of .0001 watts/meter^2, how much greater is the Intensity of the sound at the concert than your home stereo?

_{Hint: Divide}

A colony of bacteria grows according to the function below, where N is measured in grams and t is measured in days. How long will it take for the population to reach 140 grams?

_{Round to the nearest tenth.}