Which expression is equivalent to 0.2n + 2n + 4? a. 6.2n b. 2.2(n+4) c. 4n + 4 d. 2.2n+4(i think it's a.)

Our goal is to collect email addresses from 60% of customers who purchase a product." so that means if i talk to 95 customers, i need to persuade to provide an email address?

Icould really use some with this question.

Find the distance between (7,-6) and (-3,-9)