(press this if you don't see it) i need on number six and seven.

Twenty-five percent of the customers entering a grocery store between 5 p.m. and 7 p.m. use an express checkout. consider five randomly selected customers, and let x denote the number among the five who use the express checkout.

A(t)=728(1+0.04)^t how much money did aditya originally invest

How do i do this activity, is appreciated