Sam is presenting a speech on growing organic vegetables. his slideware starts with a picture of a farm with a variety of vegetables pictured in the field. his presentation zooms in on each vegetable while he talks about it, and then zooms back out when he is done. this is an example of using as a visual aid. group of answer choices

Evaluate cos2θ for cosθ = square root of 3/2

I’m still confused on how to work the percentages

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.