Express 217.3 x 10² in standard form​

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

An ant travels at a constant rate of 30cm every 2 minutes.at what speed does the ant travel per minute

When i'm with my factor 5, my prodect is 20 .when i'm with my addend 6' my sum is 10.what number am i