Lisa collected leaves from different trees for a sience project. Everyday for a week she collected 7 leaves how many leaves did she collect by hand by the end of the week

The total number of leaves that was collected by Lisa is the product of the number of days in a week and the number of leaves she collected per tree. This is shown below, (7 trees / week) x (7 leaves / 1 tree) = 49 leaves / weekThus, Lisa collected 49 leaves in a week.