To find out how much Alicia will earn for a job that takes 3 hours, we can use the formula given:
\[ \text{Earnings} = 65h + 100 \]
We will substitute \( h = 3 \) into the equation:
\[ \text{Earnings} = 65(3) + 100 \]
Calculating \( 65(3) \):
\[ 65(3) = 195 \]
Now, substituting back into the earnings equation:
\[ \text{Earnings} = 195 + 100 = 295 \]
Therefore, Alicia will earn $295 for a job that takes 3 hours.