The formula to find the surface area of a sphere is to take the radius of the sphere and square it and multiply that amount by pi and then multiply that by 4. this is written algebraically as s=4πr2, where s is the surface area, r is the radius, and the value of π is 3.14. rewrite the equation to solve for the radius of the sphere if you know the sphere’s surface area. then estimate the radius of a sphere given a surface area of 500 meters2.

Abag contains 3 red marbles, 2 blue marbles, and 2 green marbles. one marble is picked, then another marble. assume that the selections are made with replacement. a) find the probability of picking two red marbles with replacement. b) find the probability of picking a red marble and a blue marble. assume the selections are made without replacement. c) find the probability of picking two red marbles without replacement. d) find the probability of picking a red marble and a blue marble without replacement.