The Awnser is c obtuse angle
39.1 because you add 1.54 and 2.37 together then multiply by 10
There are 60 minutes in one hour.
Divide 60 minutes by 10 minutes.
You get 6. That means you would need 6 recycled bottles to power a washing machine for one hour (that will be awesome if that were the case).
Have an awesome day! :)