A community for students.
Here's the question you clicked on:
 0 viewing
nikkijoy
 2 years ago
Arnold is about to go on a 500mile car trip. His mechanic recommends that he buy a special highway engine oil that will save him 50 cents in gas for every 25 miles of the trip. This new oil, however, will cost $20. Is it worthwhile for Arnold to buy the oil if he has a coupon for $4 dollars off the price?
nikkijoy
 2 years ago
Arnold is about to go on a 500mile car trip. His mechanic recommends that he buy a special highway engine oil that will save him 50 cents in gas for every 25 miles of the trip. This new oil, however, will cost $20. Is it worthwhile for Arnold to buy the oil if he has a coupon for $4 dollars off the price?

This Question is Open

whpalmer4
 2 years ago
Best ResponseYou've already chosen the best response.0figure out how many 25 mile segments there are in this trip. multiply that number by 50 cents. compare that number with $20$4. If it is larger, then using the special oil makes sense.

whpalmer4
 2 years ago
Best ResponseYou've already chosen the best response.0Great. How much is 20 * 50 cents?

whpalmer4
 2 years ago
Best ResponseYou've already chosen the best response.0how many dollars is that?

whpalmer4
 2 years ago
Best ResponseYou've already chosen the best response.0you're not sure? how many cents in a dollar?

whpalmer4
 2 years ago
Best ResponseYou've already chosen the best response.0how much is 20 set of 2 quarters?

whpalmer4
 2 years ago
Best ResponseYou've already chosen the best response.0so, does it make sense to buy the special oil?

whpalmer4
 2 years ago
Best ResponseYou've already chosen the best response.0you can save $10 over the course of the trip. would you pay $16 for that?

whpalmer4
 2 years ago
Best ResponseYou've already chosen the best response.0for a little puzzle to test your understanding, try to figure out how many cents per 25 miles you would have to save for it to be worth buying the special oil.

whpalmer4
 2 years ago
Best ResponseYou've already chosen the best response.0or how far you would have to drive with this oil for it to be worth it...

whpalmer4
 2 years ago
Best ResponseYou've already chosen the best response.020 segments * x cents/segment = $16 — that's the breakeven point for purchasing the special oil $16/20 = $0.8 or 80 cents gas savings per 25 miles to make it worthwhile. for the second one, if we save 50 cents per 25 miles, and we need to save $16, the number of 25 mile segments to be driven is $16/50 cents = $16/$0.5 = 32 segments, or 32*25 = 800 miles

nikkijoy
 2 years ago
Best ResponseYou've already chosen the best response.0ohhh okay i jus did 25/2 lol silly me
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.