Can someone pls tell me what red line and blue line represent? For example, if they show a exponential growth or decay, shift, etc.

Both the red as well as the blue line represents a growth. And, the blue line shows a shift of +5 units on the x-axis with respect to the parent function (the red line function).

step-by-step explanation:

it will be a cylinder. with a diameter of 8 and 4 single pieces high

the arc length is found by finding the circumference of the full circle (2xpixradius) and then dividing by 4 to find just one quarter of the circle (90 degrees).