What force is responsible for the increase in potential energy of an object placed higher in the Earth's atmosphere? a. Electric Force
b. Frictional Force
c. Spring Force
d. Gravitational Force (THIS ANSWER IS CORRECT)

What percent of the circle below is shaded?

Ellen makes and sells bookmarks. she graphs the number of bookmarks sold compared to the total money earned. why is the rate of change for the function graphed to the left?

Find the volume v of the solid obtained by rotating the region bounded by the given curves about the specified line. y = x â’ 1 , y = 0, x = 5; about the x-axis v = sketch the region. sketch the solid, and a typical disk or washer.