Given right triangle ABC with altitude BD drawn to hypotenuse AC. If AC = 10 and DC = 5, what is the length of BC in simplest radical form? (Note: the figure is
not drawn to scale.)

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2

Haruka hiked several kilometers in the morning. she hiked only 66 kilometers in the afternoon, which was 25% less than she had hiked in the morning. how many kilometers did haruka hike in all?

Is the power produced directly proportional to the wind speed, give reasons for your answer?