Help PLEASE!! GEOMETRY

DE//AB, apply the Thales theorem, you have:

DC/AC = EC/BC

or

DC = (EC x AC)/BC

=> Option A is correct

Hope this helps!

:)

if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads