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rakanmadi87
16.07.2019 •
Mathematics
Linda commutes a total of 54 miles to and from work every day. she needs a new car, and good gas mileage is important to her. she’s considering two models. the first model averages 30 miles per gallon, and the second averages 27 miles per gallon. how many gallons of gas will she save in a five-day work week if she buys the first car instead of the second car?
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Ответ:
Miles per gallon(mpg) is computed by dividing the distance traveled by the how many gallons used. So you can derive a formula for how many gallons you would use given the mpg. You will end up with:
The problem asks for how many gallons of gas she will safe in a five-day work work week. So first you need to compute how many miles that would be.
54 miles/day x 5days = 270 miles
So in a five day work week, she will travel 270 miles.
Now to see how much gas she will save, compute how many gallons she will use up for each car, given the mpg of each and find the difference.
First model:30 mpg
This means that with the first model, she will have used up 9 gallons in a 5-day work week.
Second model: 27 mpg
This means that with the second model, she will have used up 10g in a 5-day work week.
Now for the last bit. How much will she save? You can get that by getting the difference of how many gallons each car would have used up.
10gallons - 9gallons = 1g
So she would have saved 1 gallon of gas if she buys the first car instead of the second.
Ответ:
If she buys the first car, she will spend
So, she will save 1 gallon of gas in a five-day week
if she buys the first car instead of the second car
Ответ:
option: D is correct. ( (D) a markup of 15% on selling price is equivalent to a 85% markup on cost ).
Step-by-step explanation:
" Markup is the percentage difference between a product's cost and its selling price "
Since we are asked to Convert a markup of 15% on selling price to its equivalent markup on cost.
As there is a markup of 15% on selling price. Hence the cost of the product would be (100-15)%=85% of the selling price.
Hence, a markup of 15% on selling price is equivalent to a 85% markup on cost.
Hence, option D is true.