In the gift shop of the history of flight museum elisa bought a kit to make a model of a jet airplane. the actual plane is 21 feet long with a wingspan of 17.5 ft. if the finish model will be 12 in long what will the wingspan be?

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

faster, im not sure why but i know it is faster