if the point (.53,y) is on the unit circle in quadrant 1, what is the value of y?

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if the point (.53,y) is on the unit circle in quadrant 1, what is the value of y?

Unit circle equation:
x^2 + y^2 = 1

Plugging in x = 0.53, we get
(0.53)^2 + y^2 = 1
0.2809 + y^2 = 1

Subtract 0.2809 from each side:
y^2 = 0.7191
y = 0.848