Step-by-step explanation:
using Pythagoras theorem
d}^{2} =4}^{2+7}^{2}
d}^{2}=16+49
d}^{2}=65
d}^{2}=√65
d=8.06 or 8
Range is ] -20 , -10 [
both points are disclude according to the empty circle
Answer:
2800=400.21x
x = 6.996327
43.96