To town b. Urban dictionary is a good way to add
I believe the answer is b
Answer:

Step-by-step explanation:
Using the rules of radicals
= 
×
⇔ 
Given
= 
Simplifying the radicals
= 
= 
=
×
= 7
and
= 8
The simplified radical is

Subtract the two numbers and you will get the answer
The first choice is the correct answer. Note that for S(t) = 5t/(t+1):At t = 0, S = 0At t = 1, S = 5(1/2)At t = 2, S = 5(2/3)And as t increases, S approaches 5. (The pattern 1/2, 2/3, 3/4...gets closer and closer to 1).