In a fish tank 8/11 of the fish have red a stripe on them. if 16 of the fish have red stripes how many total fish are in the tank?

The random variable x represents the number of phone calls an author receives in a day, and it has a poisson distribution with a mean of 8.7 calls. what are the possible values of x

Prove that 16^4-2^13-4^5 is divisible by 11.

Given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cos of 61.6