Answer: 
Step-by-step explanation:
8 x 14 x 21 = 2352, so:
√8⋅√14⋅√21 = √2352
√2352 in simplest form is 28√3
I hope this helps!
Step-by-step explanation:
6 significant figures......
If you follow the order of pemdas the answer would be (-24)
in simplist form it should be 3x+16
c square
its making me write 20 more characters
ignore this
the answer is c squared