Answer:
I think it's A AND C. The diameter is just the radius multiplied by 2 at the end of the day.B is just wrong.
Answer:
15 units
Step-by-step explanation:

d = 14.866
d = 15
Mean: 48.7
Median: 38
Mode:55
It would be 45 degrees as it is on a straight line
Answer:
4=3/4(-8)+b
Step-by-step explanation:
You have to use the equation Y=mx+b
M is your slope so 3/4
x=-8
Y=4
Then u put it into the equation and get 4=3/4(-8)+b
Hope this helps:)