Necesito ayuda en mi tarea de ase un mes

Both the red and blue line segments stretch from the center of the circle to a point on the circle. the length of the blue segment is 5. how long is the red line segment?

What is the distance from zero if a quadratic function has a line of symmetry at x=-3 and a zero at 4

What adds to be the bottom number but also multiplies to be the top number with 8 on the bottom and 15 on top