While preparing for a marathon, a runner determined that he could run 1/6 of a mile in 4/5 of a minute. If the runner ran for 1 mile how many minutes would it take?

4 4/5 minutes

Step-by-step explanation:

create a proportion:

=

cross-multiply:   t = 4

                          6     5

cross-multiply:  5t = 24

                           t = 24/5 or 4 4/5 min

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