Acar traveled at an average speed of 80 miles per hour for 3 hours and consumes fuel at a rate of 34 miles per gallon

The number of gallons of fuel that car use for the trip is 7.06 gallons.

Given that,

Now based on the above information, the number of gallons should be

= 7.6 gallons

Therefore we can conclude that the number of gallons of fuel that car use for the trip is 7.06 gallons.

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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