I'll give brainliest. if this isn't done by the end of the day i'm grounded :/ please help quickly!

Find the distance between the pair of points a(-1,8) and b(-8,4)

Henry's butcher shop uses an electronic scale that measures to 1/100 of a pound. which is the most accurate measurement based on the limitations of the scale that might be found on a package of meat sold by henry?

From a group of 10 men and 8 women, 5 people are to be selected for a committee so that at least 4 men are on the committee. howmany ways can it be done?