A store employee creates a display of refrigerators priced at $990 apiece. The store paid $450 for each refrigerator. What is the mark-up percentage?

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b. 18

step-by-step explanation:

so the equation for this is:

ab^2=ac⋅ad

ab being the top length of 6 and ac being the length of 2 and ad being the length of x. let's plug into the equation:

6^2 = 2x

now lets just solve for x:

36 = 2x

18 = x

i hope that !