Answer:
3
Step-by-step explanation:
line OQ= ON= 4 both are radius of a circle
OP is the hypotenuse of the right triangle= 5
the Pythagorean theorem is a^2+b^2=c^2
OQ^2+QP^2=OP^2
4^2+QP^2=5^2
QP^2= 25-16
QP=√9 =3
hope this work, good luck
