Find the center of the circle whose equation is x2 - 10x + y2 - 10y = -1.

the center of the circle are (5,5)

Step-by-step explanation:

x^2 - 10x + y^2 - 10y = -1.

x^2 - 10x + (-5)^2 + y^2 - 10y + (-5)^2 = -1 +  (-5)^2 +  (-5)^2

(x-5)^2 + (y-5)^2 = -1 +25 + 25

(x-5)^2 + (y-5)^2 = 49

the center of the circle are (5,5)

the surface area is 124cm²

step-by-step explanation:

length: 4cm

width: 9cm

height:   2cm