A satellite orbiting earth at an orbital radius r has a velocity v. Which represents the velocity if the satellite is moved to an orbital radius of 4r

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

Find the slope of the line passing through a pair of points

Adecorative window is made up of a rectangle with semicircles at either end. the ratio of ad to ab is 3: 2 and ab is 30 inches. what is the ratio of the area of the rectangle to the combined area of the semicircles? possible answers: a. 2: 3 b. 3: 2 c. 6: π d. 9: π e. 30: π