1. Plug in the given results and check if the equation becomes a true statement.
2. Solve the equation for x and check if you've got one of the given results.
B) to #3 (way #2.):
I assume that the original equation reads: 3e^(x+2)=75 . If so:
Therefore both answers are correct.
to #7 (way #1):Plug in x = 1 + ln(3.8):
Plug in x = 45.7012:
Therefore x = 45.7012 is an approximate solution of the equation.