I need help with 13 on both pictures. The first picture is the answer and the second picture is the question.

Given: ac and db are diameters. m∠3=

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

Kayla and alberto are selling fruit for a school fundraiser. customers can buy small boxes of grapefruit and large boxes of grapefruit. kayla sold 3 small boxes of grapefruit and 1 large box of grapefruit for a total of $65. alberto sold 1 small box of grapefruit and 1 large box of grapefruit for a total of $55. what is the cost each of one small box of grapefruit and one large box of grapefruit?