Answer:
21) r; 2.83 d; 5.66 22) d; 13.4 c; 42.09
23) r; 5.3 c; 33.30 24) r; 0.49 d; 0.99
Explanation:
it says someone just answered while i was typing so hopefully this is right
21. r; 2.83 d; 5.66
22. d; 13.4 c; 42.09
23. r; 5.3 c; 33.30
24. r; 0.49 d; 0.99
Hope this helps ;)
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