Selena reduced the time it takes her to run a mile from 8 minutes to 6 minutes. What was Selena's percent decrease in the time it takes her to run a mile?

I think the answer might be 0.48 because that is 8 percent of 6, but im not positive

Selena reduced the time it takes her to run a mile from 8 minutes to 6 minutes. What was Selena's percent decrease in the time it takes her to run a mile?

It is 25%

Option 1 is correct that is 4 units

Explanation:

Given equation is w(2w+2) = 40

we can simplify the equation by opening the brackets on left hand side of the equation we get + 2w =40

taking 2 as common factor from both the sides we will get

+ w=20

after middle term split we will get

+ 5w-4w -20=0

after simplification we will get (w+5)(w-4)

we will two values w= -5 , 4

-5 will be neglected because width can not be negative

Hence, width is 4 units.