Please help me i really need help please help me

When keisha installed a fence along the 200 foot perimeter of her rectangular back yard, she left an opening for a gate.in the diagram below, she used x to represent the length in feet of the gate? what is the value? a. 10 b. 20 c. 25 d. 30

Paul needs to buy 5/8 pound of peanuts. measure a pound into sixteenths. what measure is equivalent to 5/8 pound

What is the 8th term of the geometric sequence with this explicit formula? an= )(n-1)