What is the value of a?

In the surface area formula for cylinders which expressionrepresents the lateral area

Elena and her husband marc both drive to work. elena's car has a current mileage (total distance driven) of 15,000 and she drives 23,000 miles more each year. marc's car has a current mileage of 46,000 and he drives 9,000 miles more each year. will the mileages for the two cars ever be equal? explain.

The rectangle on the right is the image of the rectangle on the left. what transformation would result in this image? reflection rotation translation dilation