Mathamethics simplify and leave answer in decimal form (3,6×10 to the power 6)-(5,2×10 to the power 5 show steps of calculations​

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.

An arithmetic series a consists of consecutive integers that are multiples of 4 what is the sum of the first 9 terms of this sequence if the first term is 0

Aye asap pls ! markin da brainiest too ! btw da step choices are all add, distribute, divide, n subtract