During normal breathing, about 11% of the air in the lungs is replaced with each breath. Write an exponential decay model for the amount of original air left in the lungs if the initial amount of air in the lungs is 550 milliliters. How much of the original air is present after 30 breaths? Complete the equation with the known values, and then find the amount of air left after 30 breaths. A = x The amount of air left after 30 breaths is. milliliters.

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

You are cycling around europe with friends. a cycling festival is starting soon in barcelona. it will take 4.5 hours to cycle there. how many minutes in total is this?

Need this asap if anyone can i would be very grateful. if you could show workings that would really