Question

Q4: A recipe calls for 3 cups of cornstarch. One cup of cornstarch weighs 4.5 ounces. How

much would 1 cup cost if the price of cornstarch was $0.98 per pound?​

Answer 1

One cup of cornstarch weighs 4.5 ounces.The cost of 1 cup is $0.286 approximately.

SOLUTION:

Given, One cup of cornstarch weighs 4.5 ounces.

The price of cornstarch was $0.98 per pound.

We need to find 1 cup cost.

Cost of a cup is product of cornstarch weight in cup and price of cornstarch per pound.

1 cup cost = cornstarch weight
`*` price of cornstarch per pound.

Here, both the terms are in different units, we need to convert them into single unit.

Let us convert ounces into pounds

We know that, 1 pound = 16 ounces

1 ounce =
`(1)/(16)` pound

Now, one cup of cornstarch weighs 4.5 ounces

Then, cup of cornstarch weight in pounds =
`4.5 * (1)/(16)`

=
`(4.5)/(16)`

= 0.28125 pounds

Now, cost of 1 cup = cornstarch weight x price of cornstarch per pound

= 0.28125 x 0.98

= 0.275625

Hence, the cost of 1 cup is $0.286 approximately