X/5-g=a isolate x PLS

In the diagram of circle o, what is the measure of zabc?

Hormones perform important functions within the reproductive system. during puberty, a number of changes occur in the body. which hormone is responsible for the development of these characteristics in the female? estrogen progestin progesterone testosterone

Prove that 16^4-2^13-4^5 is divisible by 11.