Question

There are 28.35 g in an ounce and 2.21 lb in a kilogram. Juanita converts 3 kilograms to ounces. Is her conversion correct? Explain.

Answer 1

Answer:

Whether her conversion is correct or not, you can just base it on the true answer. For this problem, we apply the technique of dimensional analysis. You can like units if they both appear in the numerator and the denominator side. The solution is as follows:

Mass in ounces = 3 kg * (1,000 g/ 1 kg) * (1 ounce/28.35 g) = 105.82 ounces

Answer 2

Answer:

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

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

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

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

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

Step-by-step explanation:

Explained