Answer:
B) 2\ sq.rt{3}units
Step-by-step explanation:
using Pythagoras theorem
a^2+ b^2=c^2
a^2+ 3^2=(√21)^2
a^2+9= 21
a^2=21-9
a^2=12
a=√12
a=2√3
Answer:228
8x6 + 12x10 + 10x6
2950
Answer: B
The domain of a function is the set of x-values.
