What is the slope formula? Please help me

Which logarithmic equation is equivalent to the exponential equation below? e^a=55(you will receive 34 points)

You earn a 12% commission for every car you sell. how much is your commission if you sell a $23,000 car?

He ! a group of farmers planned to clean 80 acres of wheat per day to finish the work on schedule. right before the work started, they received a new piece of machinery that them clean 10 more acres per day than originally planned. as a result of increased productivity in the last day before the deadline they only had to clean 30 acres. how many acres of wheat did the group of farmers have to clean?