Question

Carli made 9 greeting cards in 3/4 hour. she determined her unit rate to be 1/12 card per hour. find her error and correct it

Answer 1

Carli is correct and there is no error in her answer. Hence, it does not require any correction.

We have Carli made 9 greeting cards in 3/4 hour and she determined her unit rate to be 1/12 card per hour.

We have to find her error out and correct it.

If a machine makes 'n' pencils in 'x' hours, then how much time will the machine take to make 'y' number of pencils?

The machine will make 1 pencil in -  $\frac{x}{n}$ hours.

Therefore, the machine will make 'y' pencils in -   $\frac{xy}{n}$  hours

According to the question -

Carli made 9 greeting cards in 3/4 hour (45 minutes).

Therefore, she will make one greeting card in -    $\frac{\frac{3}{4} }{9}$ = $\frac{3}{4} \times\frac{1}{9}= \frac{1}{12}$

This means that Carli is correct and there is no error in her answer. Hence, it does not require any correction.

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https://brainly.com/question/13953868?referrer=searchResults

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