Researchers evaluate a sample of carbon-6, which has a half-life of 50 minutes. for a particular sample, they observed that 60% of the original amount of carbon-6 had decayed. how old is this sample

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.