Saving money on gas?

Question

Let's say I use 1 gallon of gas everyday when going to work.
I work 8 hrs a day/40 hrs a week
I pass a gas station everyday. The gas is 2.50/gal
The price is definately dropping at a rate of 5 cents a day.
Will I save more money if I wait for 2 weeks and then refill, or if I replace the gallon each day I work?
How much total will I spend either way?

Still waiting on the totals.

OK...I obviously got enough to get by for two weeks. I will replace the gallon today on my way back from work. Here's the tricky part..... my days off are Sunday and Monday....hint hint.

Eye is close, but days off are wrong. Keep trying.

Answer 1

Gas won't continue dropping at 5 cents/day, that would make it $1.95/gal on the 2nd Friday (counting weekends)
You will spend less money when you buy it at it's cheapest.

Answer 2

The price on the first Monday = 2.50
The price on T,W,T,F = 2.45, 2.40, 2.35, 2.30
The price on the second Monday = 2.30 - .15 (because of Sat., Sun, and Mon declines) = 2.15
The price on T, W, T, F, = 2.10, 2.05, 2.00, 1.95
To fill up one gal each work day would cost
2.50+ 2.45+ 2.40+ 2.35+ 2.30+ 2.15+ 2.10+ 2.05+ 2.00+ 1.95 = 22.25, plus a lot of extra time driving into and out of the gas station.

Note we assumed the problem begins on a Monday and ends on Friday of the following week, which accounts for ten workdays, plus two weekend days (Sat and Sun), for 12 days, during which time prices continue to decline. We also assumed going to the gas station only on a work day; so that fillups have to be during one or more workdays.

The price in two weeks = 1.95 on the second Friday (from above); total cost fillup = N*1.95; where N = 10 gal @ 1 gal per work day (10 work days = 10 gal used); so you'd pay $19.50 to wait and fill up on the second Friday. (Two weeks from Monday is really the second Sunday, but we stay home and watch the NFL game that day. So we fill up on the preceeding Friday.)

Clearly filling up each work day is more expensive ($22.25) than waiting to fill up two weeks later ($19.50). The trick here is in recognizing that two weeks has to include at least two non working days wherein the prices continue to decline even though you are not driving to and from work.

Answer 3

You need to know the initial condition: How much gas do you have now and where are you?

Assume you're just out of gas and at the gas station.

you have to get at least a gallon to get to work and home and back to the station. That's $2.50.

tomorrow it will be $2.45 so what's the mystery in that?

Answer 4

Well, obviously if the price is certain to drop continuously you're better off waiting as long as possible. Ideally you'd want to wait until you're almost empty then fill up the gallon you'd need for that day and just that. Not realistic, but you get the idea.

Answer 5

Get a music-up. replace your oil, spark plugs, air filters, oil filters, examine the PSI on your tires. And every time available, if youre far adequate remote from a crimson gentle and you assume it to coach eco-friendly by using the time you attain the intersection, dont come to an entire stop, merely roll as much as the intersection. It takes much less power(gas) to get the motor vehicle going from a rolling initiate than from a ineffective initiate. merely be careful, dont run crimson lighting fixtures furniture.