Solve for n: 2n+3=-3.2

Can someone me with this graph problem by the way i need to know the answers by today since this assignment is due ! !

Circle a has center of (2,3) and a radius of 5 and circle b has a center of (1,4) and a radius of 10. what steps will show that circle a is similar to circle b 1) dilate circle a by a scale factor of 2 2) translate circle a using the rule (x+1,y-1) 3) rotate circle a 180 degrees about the center 4) reflect circle a over the y-axis

What is the measure of ba (the minor arc) in the diagram below?