6nCr2 =
First
Enter the number 6
then
Math Key, Enter Key
Press Enter Key 3 times >>> to PRE
Then choose number 3 for nCr
Screen should show 6 nCr
Then enter the number 2, then press enter key.
Answer will be 15.
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If you mean 84 squared then it is 84*84 = 7056 If you mean the square root of 84 then it is 2 times the square root of 21 which is an irrational number
84
146 students.... 84 boys. Meaning there are 84 boys and 62 girls. (146-84=62) 84 divided by 62 is 1.355. Meaning 1.355 boys to every 1 girl.
Supplementary angle = 180 - 84 = 96 degrees.
84 square meters = 904.17 square feet.