Two points A and B, are plotted on a centimeter grid. A has cordinates (2,1) and B has cordinates (8,5). a. work out the cordinates of the mis point of the line joining A and B.
b. use Pythagoras Theorem to work out the length of AB. Give your answers to correct 3 significant figures.

If there is no real number solution to the quadratic equation x^2+2x+c=0 what is a possible value of c? 1 -2 0 3

The lengths of nails produced in a factory are normally distributed with a mean of 4.91 centimeters and a standard deviation of 0.05 centimeters. find the two lengths that separate the top 4% and the bottom 4%. these lengths could serve as limits used to identify which nails should be rejected. round your answer to the nearest hundredth, if necessary.

What is the percentile for data value 6 in the following data set? 4 13 8 6 4 4 13 6 4 13 2 13 15 5 9 4 12 8 6 13 40 25 35 62