Acontractor digs a hole for the basement of a new house that is 40 feet long and 10 1/2 feet deep. what is the width of the hole if 6,510 cubic feet of dirt are removed?

dont trust me im no expert these losers made me fail a test bro this sucks

step-by-step explanation:

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