In a parking lot, 20% of the vehicles are trucks and the remainder are cars. If there are 30 more
cars than trucks, how many cars are in the
parking lot?

Zachary has been trying to work on an essay for almost three hours, be he can't seem to focus for more than 15 or 20 minutes at a time. what should he do so that the quality of his work doesnt suffer because of poor concentration and lack of energy