Question

A box of cereal states that there are 90 calories in a 3 4​-cup serving. What is the unit rate for calories per​ cup? How many calories are there in 2 cups of the​ cereal?

Answer 1

Calories per cup = 120 calories

Calories in 2 cups = 240 calories

Explanation:

Given that:

Number of calories in a
`(3)/(4)^(th)` cup serving = 90 calories

To find:

Unit rate for calories per cup = ?

Number of calories in 2 cups of cereal = ?

Solution:

Here we are given the number of calories in a
`(3)/(4)^(th)` cup serving.

To find the calories in one cup, we need to divide 90 calories with
`(3)/(4)`.

So, unit rate for calories per cup can be given as:

`\frac{90}{\frac{3}4}\\\Rightarrow (90)/(3)* 4\\\Rightarrow \bold{120 \ calories}`

To find the calories in 2 cups of cereal, we need to multiply the unit rate for calories per cup with 2.

So, calories in 2 cups of cereal =
`120 * 2` = 240 calories

Therefore, the answer is:

Calories per cup = 120 calories

Calories in 2 cups = 240 calories