Question

A circle whose center is at (1, -3) passes through (7, 5). What is the length of the radius of the circle?

Answer 1

you are being asked to find the distance between the two points
do you know how to find that using the distance formula?

Answer 2

from 1 to 7 is 6 units
from -3 to 5 is 8 units
the distance is
\[d=\sqrt{6^2+8^2}\]

Answer 3

compute and get
\[\sqrt{36+64}=\sqrt{100}=10\]

Answer 4

thank u