Can someone please help me

Suppose a man is heterozygous for heterochromia, an autosomal dominant disorder which causes two different‑colored eyes in an individual, produced 25‑offspring with his normal‑eyed wife. of their children, 15 were heterochromatic and 10 were‑normal. calculate the chi‑square value for this observation.

Astudent simplified a rational expression as shown.

What is the measure of the smallest angle in the diagram? 15 29 32 45