Find the product of (3.5x10^5) (8.2 x 10) ​

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

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

Whats is the value of the variables ?