Work out the following without a calculator. (Show working out)
3 x 10^-2

3/100

Step-by-step explanation:

3*10−2

=3*1/10*10

=3/10*10

=3/102

=3/100

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