Question

PLEASE HELP ASAP I WILL GIVE BRAINLIEST!!! <3

Answer 1

1. 42e+18

That Is the answer for one

Answer 2

1. Well, you can use the distributive property, i.e., you can multiply the entire thing by an integer to get a multiple of the term. So:
$6(7e+3) = 42e+18$

2. The 18th customer will because 18 is a multiple of 6 as well as 9. You could also say 36th, 54th, or even further: just keep adding 18. Symbolic Representation:

∞
∑ (Something that says "this repeatedly adds up to 18")
n=1

3. $-1 F\ \textless \ 3F$
*Not sure about this one.