Solve the equation or formula for the indicated variable. a=21^3w, for w
a. w=a/21^3
b. w=a/21
c. w=1^3/2a
d. w= a/3-2

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