David uses 1 4 cup of apple juice for every 1 2 cup of carrot juice to make a fruit drink. Enter the number of cups of apple juice David uses for 1 cup of carrot juice.

1/2 cups of apple juice.

Step-by-step explanation:

The ratio between apple juice to carrot juice is

1/4 : 1/2

By using this ratio we can find the number of cups of apple juice needed for one cup of carrot juice.

since 1 cup is twice the carrot juice in the ratio, we need twice the ratio in the apple juice as well.

1/4 * 2 = 2/4

This can be simplified to 1/2

(b) 240

step-by-step explanation:

first, we use the pythagorean formula using the given side lengths to find x. then we use x to find the side lengths. then we add the side lengths to find the perimeter.

pythagorean theorem formula:

a^2 + b^2 = c^2

(x - 20)^2 + (x - 40)^2 = x^2

x^2 - 40x + 400 + x^2 - 80x + 1600 = x^2

x^2 -120x + 2000 = 0

(x - 100)(x - 20) = 0

x - 100 = 0 or x - 20 = 0

x = 100 or x = 20

we see that the solution x = 20 must be discarded because it will give a negative side length and a side length of 0. the only valid solution is x = 100.

perimeter = sum of the lengths of the sides

perimeter = x + x - 20 + x - 40

perimeter = 3x - 60

replace x with 100.

perimeter = 3(100) - 60

perimeter = 300 - 60

perimeter = 240