Sizce matematiği nasıl başarabilirim?¿?¿​

Asocial networking site currently has 400,000 active members, and that figure is predicted to increase by 32% each year. the following expression represents the number of active members on the site after t years.

Iwill give ! if m∠a=59 and m∠3=81°, what is m∠b? m∠b= _[blank]_°

In which form is the following function written? y = - 2(x – 3)(x + 5)