There are 80 people in line to get a famous soccer player's autograph. But she only has time to sign 50. Each person in line is allowed to get only one autograph. What is the quantity of autographs supplied?

Diffraction is when light is bent around obstructions. which of the these observation about clouds would indicate diffraction? a) after rain storms, you can sometimes see rainbows. b) clouds are white or gray and cannot be seen through. c) on a cloudy day, the temperature tends to be cooler than a sunny day. d) the edges of dark clouds appear lighter. this