HELP ASAP PLEASE I WILL MARK David roller skates 42 Km in 3 1/2 hours. What is his average speed in kilometers per hour? Speed =​

12km

Explanation:

This is pretty easy, all you have to do is divide 42 by 3.5 and then you get 12<3 hope that helps!!

after a the power stroke, adp is released, but the cross-bridge formed is still in place. atp then binds to myosin, moving the myosin to its high-energy state, releasing the myosin head from the actin active site.

the elements of art are the visual tools that the artist uses to create a composition. these are line, shape, color, value, form, texture, and space.

the principles of art and design are balance, contrast, emphasis, movement, pattern, rhythm, and unity/variety.