Pls help me pls

Can someone answer this question? : )

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122

The image of abc is a'b'c. what transformations would result in this image? abc is reflected over the line x = 1, then is rotated -90° around the origin. abc is reflected over the line y = x - 1, then t: (x, y) → (x - 1, y - 1). abc is rotated 90° around the origin, then is reflected over the y-axis. abc is rotated -90° around the origin, then is reflected over the line y = -1.