Help please, I am begging

Reflect the point (7,0) across the y-axis

The weight of a radioactive isotope was 96 grams at the start of an experiment. after one hour, the weight of the isotope was half of its initial weight. after two hours, the weight of the isotope was half of its weight the previous hour. if this pattern continues, which of the following graphs represents the weight of the radioactive isotope over time? a. graph w b. graph x c. graph y d. graph z

Find the length of the radius of a circle with the center at -7+2i and a point in the circle at 33+11i