Help please to find the stuff

  y = (√3)/2

Step-by-step explanation:

The unit circle has equation ...

  x^2 +y^2 = 1

For x = 1/2, the value of y can be found to be ...

  (1/2)^2 +y^2 = 1

  y^2 = 1 - 1/4 = 3/4 . . . . . subtract 1/4

  y = √(3/4) . . . . . . . . . . take the square root (y > 0 here)

  y = (√3)/2

Step-by-step explanation:

(2000 lb/ton)*(2 ton)*(15 ft)/(5 min) / (33000 ft·lb/min)/(1 hp)

= (2000*2*15/(5*33000) hp

≈ 0.364 hp

If you want something other than horsepower, you need to Google the desired conversion.