How much gas would you need to drive to California from philadelphia appro 3000 miles with 22 miles per gallon gas cost 1.50?

Answer 1

3000/22 = 136.4 gallons.

At $1.50 per gallon, that much gas would cost about $205.

But if you've bought gas lately (Summer/Fall of 2009), you know that the cost of gas is much closer to $2.60
on the average now. So you need to plan on spending closer to $355 for the trip. And to be safe, you should
have $400 in your pocket that's not needed for anything else but gas.

BTW -- Are you planning to come back, or to have anything left when you get to California ?
In either case, you need to leave with more than that in your pocket.