First of all, it is 2r

and it would be divide by 3.14 (pi) and then you should have the diameter. Then divide by 2 to find radius.
I belive that the answer should be D) 100 for $10.00 because I had this exact same question one time.
Hope my answer helps!
Thank you for letting me answer!
Thank you,
Florida Mermaid
Answer:
Soil bacteria convert nitrogen gas into ammonia, nitrites, and then nitrates. Nitrates are then absorbed by producers.
Step-by-step explanation:
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Hello! Your answer was 19! There is no possible way for me to show you how to work this out using base ten blocks! Hopefully you can work it out in your head next time! :)
Answer:
10 for the empty box
Step-by-step explanation:
When your placing them on the graph the one on the left side is x axis (the horizontal line) and the one on the right is the y axis (the vertical line)
Hope this helps!