How to define when something is certain to happen?

Brian is calculating the standard deviation of a data set that has nine values. He determines the sum of the squared deviations of 316

A circular race track has the diameter of 1/2 mile. How far does the car travel in one lap around the track?

How many quarters are there in $2? A. 2 B. 4 C. 6 D. 8

Consider the following proposed proof by contradiction that for all positive integers n, 3n > 2. Proof by Contradiction: Suppose that the statement is false. Since n is a positive integer, n ≥ 1. That means 3n ≥ 3 > 2. Thus the statement is true.

Answer this problem 6/7*1/2 =

Bingo uses the numbers 1 to 75. If you randomly select a number, What is the probability it will not be a multiple of 7? Express your answer as a fraction.

Which of the following provides sufficient information to write the equation of any circle? A. the x-intercept B. the y-intercept C. coordinates of the center D. radius and coordinates of the center

Solve | 5 x - 1 | < 1

How much is 16 dollars per a gallon

Derrick and Mark are brothers who live in the same house. Mark is at home, and Derrick is 5 miles away from home. Both boys begin riding their bikes at the same time.