Logarithms and stuff, please help

Step-by-step explanation:

Logarithms

The model that predicts the percentage of voters (V) as a function of the number of years (t) is:

It's required to find in how many years the value of V will be V=80%. The equation to solve is:

Subtracting 100:

Dividing by -30:

Applying logs:

For logs property:

log(e)=1. Solving for t:

Since 0.04=1/25:

the entire expression should be subtracted from 30. to subtract the quantity, distribute the negative sign, which changes the signs on the terms. so, the –2 changes to positive and gets added to 30 instead of subtracted from it.

hope this ! ^w^

answer:   c ?

step-by-step explanation: