Question

Ming used the calculations shown to find out how much he would spend on 6 pounds of ground beef if 10 pounds of ground beef cost $25.00. StartFraction 10 pounds over 25 dollars EndFraction = StartFraction 10 pounds divided by 25 over 25 dollars divided by 25 EndFraction = StartFraction 0.4 over 1 EndFraction. Unit Price = 40 cents. 40 cents times 6 = 2 dollars and 40 cents. What was Ming's error? He determined pounds per dollar by dividing 10 by 25 but wrote the unit rate as a dollar value. He divided the numerator and the denominator of the fraction by 25. He made a mistake when finding the quotient of 10 pounds and 25 dollars. He made a mistake when finding the product of $0.40 and 6.

Answer 1

d

Explanation:

Answer 2

He determined pounds per dollar by dividing 10 by 25 but wrote the unit rate as a dollar value.

Explanation:

Given

`(10\ pounds)/(\$25) = (10\ pounds)/(25) / (\$25)/(25) = (0.4)/(1)`

`Unit\ Price = 40\ cents`

`40\ cents * 6 = \$2.40`

Required

Determine Ming's error

Ming's error is from here

`(10\ pounds)/(\$25) = (10\ pounds)/(25) / (\$25)/(25) = (0.4)/(1)`

He calculated the unit rate as pound per dollar.

So, after calculating the unit rate, the unit should be:

`Unit\ Rate = 0.4\ pound/\$`

But instead, he solved as:

`Unit\ Rate = \$0.4/ pound`

Hence, (a) is correct