Differentiating exponential functions in exercise, find the derivative of the function. see example 2 and 3.
f(x) = (e^x + e^-x)4/2

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.

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry

The diagram represents the polynomial 4x2 + 23x – 72. what is the factored form of 4x2 + 23x – 72? (4x + 8)(x – 9) (4x – 8)(x + 9) (4x + 9)(x – 8) (4x – 9)(x + 8)