exam Maths Puzzle Numerical Ability

Give the equation for the circle with center C(3,-2) and radius 4. Thanks!

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exam Other Question

Which geometric formula needs to be used for: a person hiking a straight track of 5.4 kilometers? They have been hikinbg for 45 min at a rate of 2.4 k per/hr. How much further (formula for)to reach the end of the trail?? the length of a room is two and half time its width. if the perimeter of the floor of the room is 70m find the length & width of the room.