A shade of green paint is to be mixed with 3 parts blue and 2 parts yellow. Ten gallons of green paint are to be mixed. How many gallons of yellow paint must be used? 2, 4, 5, or 6 and 2/3

Hurry and answer this! circle x with a radius of 6 units and circle y with a radius of 2 units are shown which steps would prove the circles similar? translate the circles so they share a common center point, and dilate circle y by a scale factor of 4. translate the circles so the center of one circle rests on the edge of the other circle, and dilate circle y by a scale factor of 4. translate the circles so they share a common center point, and dilate circle y by a scale factor of 3. translate the circles so the center of one circle rests on the edge of the other circle, and dilate circle y by a scale factor of 3

This is different from the first one can someone me

How do you write something in scientific notation?