Hlep me

which word phrase can use to represent the algebraic expression 4 z

a: the product of 4 and a number z
b: the sum of 4 and a number z
c: the quotation of 4 and a number z

and how

In 1995 america online had about 3000000 users over the next decade users are expected to increase from a few million to the tens of millions suppose the number of users increased by 150% by the year 2000 how many users will there be in the year 2000