The load l, in pounds, on a certain sail varies directly as the square of the wind speed , in miles per hour. if the load on a sail is 560 lb when the wind speed is 20 mph, what is the load on the sail when the wind speed is 10mph?

40 degrees

Step-by-step explanation:

The answer is 40 degrees. Angle x and angle y form vertical angles, therefore x = y. Angle y forms a straight line with the 80° angle and the 60° angle which means that 80° + 60° + y = 180°. 140° + y = 180°. y= 180° - 140°. y = 40°. As mentioned earlier: x = y, so x = y = 40°.

Hope this helps