Question

Sara has a recipe for a cake that her mother gave her. The recipe calls for 3/4 cups of sugar for each cake. Sara and her friend Cindy are making 3 cakes instead of one. Sara is telling Cindy that they will need 9 cups of sugar. Explain in words on your paper why Sara is right or wrong using a convincing arguement. To make 3 cakes how much sugar will they need?

Answer 1

ANSWER

Sara is wrong that she need 9 cups of sugar for making the 3 cakes.

Reason

As given

Sara has a recipe for a cake

recipe calls for 3/4 cups of sugar for each cake i.e

$one\ cake\ require\ \frac{3}{4}\ cups\ of\ sugar.$

now we calculated for the 3 cake.

$three\ cake\ require\ sugar\ = 3\times\frac{3}{4}$

we get

$i.e\ 3cake\ require\ \frac{9}{4}cups\ of\ sugar.$

Therefore Sara assumption is wrong

Hence proved