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?
$7 kg x 1000 g/1 kg x 28.35 g/1 oz = 198,450 oz$
a: Miriam set up the problem correctly but made a multiplication error.
b: Miriam multiplied correctly, but her second fraction should be $1 kg/1000 g$.
c: Miriam multiplied correctly, but her third fraction should be $1 oz/28.35 g$.
d: Miriam is missing a fraction that is needed to convert the 7 kilograms to pounds.

Answer 1

Answer: C

: Miriam multiplied correctly, but her third fraction should be .S

Step-by-step explanation: Miriam used the unit conversation upside down. The 7000 g should have been multiplied by 1oz/28.35g

The grams cancel and the division of 7000 be 28.35 results in 246.91 oz Round to 252oz.

Alternative: 7kg (2.21 lb/kg)(16oz/lb)=252.5oz

The kg and lbs cancel and the amount of ounces remains.