I really don't think you wrote the question properly. Or maybe you did, but this question doesn't make any sense! :/
It is given in the question that,

Since we have the value of r given, so we have to use the formula to find the nth term of the geometric progression, which is

Substituting the values of a and r, we will get

So the correct option is the third option .
Answer:
There are many ways to show it like-
Step-by-step explanation:
2/5 as it’s already shown, or you can use 2 divide by 5, many people use 2[5] that’s the ways they showed my in my school idk if its different for you
please give a more detailed question and i will be happy to try and help with your question
Answer:
42
Step-by-step explanation:
for one cup 28/12
for 18 cup,
(28/12)×18
=42