Answer:
a. 200°
Step-by-step explanation:

Answer:Sorry i have no time to read it all bro
Step-by-step explanation:
This is the number of combinations of 2 from 23
23C2 = 23! / 2! 21!
A quick way to do this is 23*22 / 2 = 253
Answer:
174.19 cm3 i am not sure though.
Step-by-step explanation:
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