To determine customer opinion of their pricingpricing, home depothome depot randomly selects 9090 check out linescheck out lines during a certain week and surveys all customers in the check out linescustomers in the check out lines. what type of sampling is used?

da freeck kinda math is this just drop out

step-by-step explanation:

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4