Please help!
How would I solve number 4 with the variables of x, y, and z?

How many of the 250 grandparents in the population would you expect to prefer online shopping with merchant a? merchant a: 4 merchant b: 6 merchant c: 2 merchant d: 3 other: 5 none: 5 answer choices: a.about 4 b.about 8 c.about 40 d.about 21

Can somebody 1. what is the formula for finding the vertical distance between two points on a coordinate plane?

12 out of 30 people chose their favourite colour as blue caculate the angle you would use for blue on a pie chart