Abag has 4 yellow, 6 red, 2 green, and 8 purple marbles . what is the probability of picking a purple marble, replacing it, and then picking another purple marble

What is the length of the segment joining the points at (4,5) and (6,-2) round to the nearest tenth if necessary

I’m on question 7 it says a covered water tank is in the shape of a cylinder the tank has a 28 inch diameter and a height of 66 inches to the nearest square inch what is the surface area of the water tank

Charlie tosses five coins.what is the probability that all five coins will land tails up.