Circle O shown below has an are of length 34 inches subtended by an angle of 78°. Find the length of the radius, a, to the nearest tenth of an inch.

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

beth buys 10 x shirts and still has more than 100 in her account