Cell phone coverage is in a circular pattern from the tower. if the equation of this pattern is x^2 + y^2 = 2025, how many miles away from the tower will you have coverage?

The circle equation in its standard form is
x^2+y^2 = r^2
r is the radius.

the radius in this equation is the square root of 2025 which is 45 miles

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.