Help pls... Its due in hour hope answer this question(i give you brainest)

In the image, point a marks the center of the circle. which two lengths must form a ratio of 1 : 2? (options are in the images since thought they were harmful phrases)

Four congruent circular holes with a diameter of 2 in. were punches out of a piece of paper. what is the area of the paper that is left ? use 3.14 for pi

If a line is defined by the equation y = 5x + 2, what is the slope?