How much money should I receive for this favor?

I'm a senior in college and I'm doing a favor for a professor of mine (we have a good relationship) by picking up and dropping off her daughter (3rd grade) off somewhere every Monday for the next 13 weeks. She wants to pay me, but I'm not sure how much I should tell her! Should I charge for just how much gas money it would use? It would be about a 35-45 minutes for me to get from my house>> to hers>> to where I would be dropping her off (plus another 25 minutes for me to get home). My car gets about 30-38 miles per gallon. THANKS!

36 miles per gallon is 15.31 km per liter. gives 9.27 liters. because of significant figures you answer is more correctly 9.3 liters.
Are you measuring mile per gallon to the inch? and gas to the spoonful.

When I was in college i took the commuter rail and took the T to my school. No doubt, it is difficult to study while commuting but you shouldn't drop out. If you can, just study or do homework on the train. If it is difficult, try to transfer somewhere closer to you. Not trying to be rude but you gotta muscle through it. Have perseverance!!

Hi, does anyone, that works for uber in Atlantic City, know exactly when is the best time and place to work in Atlantic County. Thank you!?

If there is a link for the best times and places to work in Atlantic County directly from uber that would be great too. Thanks again.