Are there always the same number of prime numbers between 2 consecutive multiples of 10? why?

Yes it is 5

Step-by-step explanation:

It is 5 because you divide 2 and 10 and it is 5

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

0.6, 3/5, and 6% are the 3 same portion.

but, when they're all changed to a decimal they would equal to 0.6.

hope this , good luck!