Kelly is knitting a scarf for her brother. It took her 13 hour to knit 38 foot of the scarf. How fast is Kelly's knitting speed, in feet per hour? 412 feet per hour 3 feet per hour 212 feet per hour 118 feet per hour

I think its 118 feet per hour

Step-by-step explanation: Sorry if im wrong

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have