Question

There are 28.35 grams in an ounce and 2.21 pounds in a kilogram. Miriam converted 7 kilograms to ounces, but her answer is not correct. What is the best explanation of her error?

7 kilograms times StartFraction 1000 grams Over 1 kilogram EndFraction times StartFraction 28.35 grams Over 1 ounce EndFraction = 198,450 ounces

A. Miriam set up the problem correctly but made a multiplication error.

B. Miriam multiplied correctly, but her second fraction should be StartFraction 1 kilogram Over 1000 grams EndFraction.

C. Miriam multiplied correctly, but her third fraction should be StartFraction 1 ounce Over 28.35 grams EndFraction.

D, Miriam is missing a fraction that is needed to convert the 7 kilograms to pounds.

Answer 1

option c

Explanation:

I TOOK THE TEST TRUST MEEEEEE

Answer 2

Answer: OPTION C.

Explanation:

For this exercise it is important to remember the following:

`1\ kilogram=1,000\ grams`

Knowing this and based on the information provided in the exercise, you can make the conversion from kilograms to ounces. This is:

`(7\ Kg)((1,000\ gr)/(1\ Kg))((1\ oz)/(28.35\ gr))=246.913\ oz`

According to the exercise, Miriam's procedure was:

`(7\ Kg)((1,000\ gr)/(1\ Kg))((28.35\ gr)/(1\ oz))= 198,450\ oz`

So you can identify that she made a mistake.

Notice that:

1. Miriaim multiplied correctly.

2. Butt the third fraction should be
`(1\ oz)/(28.35\ gr)` and not
`(28.35\ gr)/(1\ oz)`.