I am really struggling with this question. please help.

Solution,

Here, n=5 which is x>0

f(x)=4x+3

=4*5+3

=20+3

=23

Hope this helps...

Good luck on your assignment..

the monthly balance will be $75,000

cross multiplying, we get :

⇒ (3) × (5) = (9) × (x)

⇒ 15 = 9x