What is the ratio of the area of a circle with the radius r to the circumference of the circle?

For an experiment, a penny is tossed. at the same time, a spinner with 8 congruent sections numbered 1–8 is spun. how many possible outcomes are there for the experiment?

Use the data on the dot plot to answer the question.how many people read for more than three hours last week? i'm on a unit test review

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?