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 4 cups of the? cereal

Answer 1

Answer:   unit rate for calories per cup = 120

calories in 4 cups of cereal = 480

Solution:

Total number of calories in a box of cereal = x calories

Calories in 3/4 cup serving = 90

How many calories in 4 cups = c

How many calories per cup = x

Unitary method

Cups                        Calories

3/4                            90

 1                                 x

Corss multiply

3/4 * x = 90 * 1

x = 90 * 4/3

x =  120 calories

Now for 4 cups,

Cups                calories

1                         120

4                          c  

(Cross multiply)      

1 * c = 120 * 4

c =   480 calories answer