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

Answer: OPTION C.

Step-by-step 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:

$(7\ Kg)(\frac{1,000\ gr}{1\ Kg})(\frac{1\ oz}{28.35\ gr})=246.913\ oz$

According to the exercise, Miriam's procedure was:

 $(7\ Kg)(\frac{1,000\ gr}{1\ Kg})(\frac{28.35\ gr}{1\ oz})= 198,450\ oz$

So you can identify that she made a mistake.

Notice that:

1. Miriaim multiplied correctly.

2. Butt the third fraction should be $\frac{1\ oz}{28.35\ gr}$ and not $\frac{28.35\ gr}{1\ oz}$.

Answer 2

Answer:

option c

Step-by-step explanation:

I TOOK THE TEST TRUST MEEEEEE