"A Radio Signal Can Transmit Up To A Distance Of 3 Km.If The Radio Signals Origin Is At A Point Whose Coordinates Are (4, 7) ,What Is The Equation Of

A radio signal can transmit up to a distance of 3 km.If the radio signals origin is at a point whose coordinates are (4, 7) ,what is the equation of the circle that defines the boundary to which he messages can be transmitted ?

  Circle equation:
(x - h {)}^{2} + (y - k {)}^{2} = {r}^{2}
r = 3km
h,k = 4,7
Substitute
(x - 4 {)}^{2} + (y - 7 {)}^{2} = {3}^{2}

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