66 cm Is this radius or diameter?
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If the line is going straight across the circle, is it the radius or diameter?

15 point ! ~ see if you know the answer to both you!

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.

Simplify the expression. -2/5(10+15m-20n)