9.2 (b) is the answer hope this helped!
A
Working:
Tan(angle)=opposite/adjacent
Tan60 = x/7root3
x=7root3 x Tan60
Enter in calculator
x=21
Are you sure the options are what u have written above? because sqrt of 5x=sqrt of 5x,
sqrt of 20x=2•sqrt of 5x,and sqrt of 80x= 4•sqrt of 5x..
Lol battlefield or on a map when you're look for a particular place
F(n-1) = f(n) - 5, based off of the first one
