A circle has a diameter with endpoints at –2 + i and –6 –11i. What is the center of the circle? –8 –10i
–4 – 5i
–2 – 6i
2 + i

For which of the following counts would a binomial probability model not be reasonable? a)the number of people in a classroom born in januaryb) the number of people in a classroom with red hair c) the number of people admitted to a hospital in a day with a particular disease d) the number of heart beats in a one-minute perio.

There are four paths from the cabin to the lake. and how many ways can you walk from the cabin to the lake back?

The diameter of the moon is about 3500 km. approximate the surface area of the moon using the formula for the surface area of a sphere, s = 4πr^2. write your answer in scientific notation.