Molly has 213 hours to study at the local library. she studies each subject for 79 of an hour. molly has 213 hours to study at the local library. she studies each subject for 79 of an hour. molly has 213 hours to study at the local library. she studies each subject for 79 of an hour. molly has 213 hours to study at the local library. she studies each subject for 79 of an hour. molly has 213 hours to study at the local library. she studies each subject for 79 of an hour. molly has 213 hours to study at the local library. she studies each subject for 79 of an hour. molly has 213 hours to study at the local library. she studies each subject for 79 of an hour. how many subjects does she study?