What is the perimeter (distance around) triangle ABC with vertices at the following
coordinates:
(3,5), (1.-4) , (-3.1)
(Hint: find the distance of each side individually!

Students are given 3 minutes for each multiple-choice question and 5 minutes for each free-response question on a test. there are 15 questions on the test, and students are given 51 minutes to take it. how many multiple-choice questions are on the test?

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500

The distance of a chord from the centre of a circle is 12cm and the lenght of the chord is 10cm. find the radius of the circle