I would say the best estimate would be 9 because the real answer is 8.71 and if you round that to the 1 place the answer would be 9.
Answer:
BCD
Step-by-step explanation:
The top rectangle is ABCD because of its vertices. BCD is included in it.
I’m not sure what the first one is, but number 4 is A) y=2x+4
9.81 times 10 to the -5th power
18 over 36 simplified is 1/2