Question

A certain highway undergoes a difference in elevation of 1600 feet in 8 miles. What is the average percent slop of the highway's grade?

Answer 1

do you know what slope is?

Answer 2

it is a change of something over another change of something

Answer 3

I do not. That's the question. In the textbook, a similar question is asked and its is "1800 feet and 7 miles" and the percentage is 5.

Answer 4

you are given two somethings here
feet and miles
use that in my definition of a slope

Answer 5

I don't get how to set it up to get a percentage

Answer 6

make sure you also write both things in the same unit

Answer 7

set the fraction up first

Answer 8

then we will write the fraction as a percentage by just dividing

Answer 9

so 8 miles in feet is 42240

Answer 10

so 1600/42240 = .0378...

Answer 11

right which you can write .0378... has a percentage
just like you would do for that other problem you put
which i will do here so you can have an example


\[\frac{1800ft}{7m}=\frac{1800 ft}{7 m} \cdot \frac{1 m }{ 5280 ft} =\frac{1800}{7(5280)}=\frac{1800}{36960} \approx 0.0478 =4.78 \%\]

Answer 12

which your book rounded to 5 percent

Answer 13

AHHH now I see it. It has been too long since I've done math like this. It's so easy that it's hard. Thanks so so much!

Answer 14

lol np

Answer 15

so you can say your answer is what?

Answer 16

write .0378 as a percent

Answer 17

remember I wrote .0478 as 4.78 percent

basically the decimal point was just moved over twice