Does anyone know how to do 1 and 2? i suck at trigonometry.

If 20% of a number is 35, what is 50% of that number?

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

Mackenzie needs to determine whether the rectangles are proportional. which process could she use? check all that apply.