How many more buttons will teresa need to make 12 puppets ? explain

Hi my sisters and brothers can tell me the answer because i don’t understand the question

Axel follows these steps to divide 40 by 9: start with 40. 1. divide by 9 and write down the remainder. 2. write a zero after the remainder. 3. repeat steps 1 and 2 until you have a remainder of zero. examine his work, and then complete the statements below.

Given: circle o, cd is diameter, chord ab || cd. arc ab = 74°, find arc ca.