PLEASE HELP 50 POINTS

What is the inverse of y= 1/3 * 7^x-1

15 points ! ~ see if you know the answer to both you!

Apark is in the shape of a rectangle. the park authorities are planning to build a 2-meter-wide jogging path in the park (shown as the shaded region in the image). what is the area of the jogging path? plz

Which recursive formula can be used to determine the total amount of money earned in any year based on the amount earned in the previous year? f(n+1)=f(n)+5