You are designing a ramp where the horizontal distance is twice the vertical rise. what will be the ramp angle to the nearest tenth of a degree?

Use the definition of tangent

or inv tangent (arctan or atan)

tan (theta) = opposite side / adjacent side

the vertical rise would be the opposite side, the horozontal distance would be the adjacent side

let rise = y

let distance = x

x=2y

so tan (theta) = y/2y

tan (theta) = 1/2

theta = atan (1/2)

grab a handy dandy calculator, unless you know this conversion off the top of your head