Someone me find the pythagorean theorem for these ¿?

The parabola opens: y=√x-4 (principal square root) up down right left

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base