The polynomial function I (a) = -47.31a2 + 4646.9a – 57, 834 represents the average income for residents of the United States, by age,
in 2014. It can be used to approximate the average income I where "a" is
the age of the individual.
Use the function to estimate the average income of a 20-year-old in
2014.

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

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step-by-step explanation:

1/2(2*4)=6 $$- agahajakanajak

hello!

some people may think so but i don't. its just a human instinct in my opinion.

have a fantastic day! ~pooch ♥