Answer:
vshsgshbsbdhhh
Step-by-step explanation:
bsbdhbdbbdbbdbdvvdvvvvdhhdhhdhhdhbdbevdvveh
No
645 becomes 650 when rounded to the nearest ten
645 becomes 600 when rounded to the nearest hundred
This one is tricky....but I'll go for D cause your multiplying a number towards 5
I can't really help without the amounts being given but I can say that two supplementary angles add up to 180 degrees, so I hope that helps