Use a half-angle identity to find the exact value of sin 67.50.

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.

Find the number of liters in 12.8 gal of gasoline. round to the nearest hundredths

If i have 20$ and i gave 5$ away how much i got