The price of a notebook was $3.90 yesterday. today, the price fell to $3.40
. find the percentage decrease. round your answer to the nearest tenth of a percent.

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.

In two or more complete sentences, determine the appropriate model for the given data and explain how you made your decision. (1,-1), (2,0.5), (5,1.5), (8,2)

Find the quotient. 50a2 – 98b2 -5a +7b