Question

To feed his plants, logan creates a mixture that requires 3/8 cup of plant food for every gallon of water. If he uses 10 1/2 gallons of water, what is the total amount of plant food he needs?

Answer 1

10.5gal(3/8cup/gal)=3.9375 cups  (3 15/16 cups)

Answer 2

Answer:
`3(15)/(16)\text{ cups}`

Explanation:

Given: To feed his plants, logan creates a mixture that requires 3/8 cup of plant food for every gallon of water.

i.e. For 1 gallon of water, the plant food requires =
`(3)/(8)\ cup`

Now, For
`10(1)/(2)` gallons of water, the plant food requires =
`10(1)/(2)*(3)/(8)` cups.

`=(21)/(2)*(3)/(8)\\\\=(63)/(16)\\\\=3(15)/(16)\text{ cups}`

Hence, the total amount of plant food he needs=
`3(15)/(16)\text{ cups}`