Ineed to know the answer to this problem plz

What is the equation of the following graph in vertex form? parabolic function going down from the left through the point zero comma twelve and through the point two comma zero and turning at the point four comma negative four and going up through the point six comma zero and continuing towards infinity courtesy of texas instruments a: y = (x − 4)2 − 4 b: y = (x + 4)2 − 4 c: y = (x + 2)2 + 6 d: y = (x + 2)2 + 12

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

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