Pls help! will give brainlist!

Ken will flip a fair coin and then randomly choose one of three colored cards. The possible outcomes are shown below. What is the probability that tales will turn up and that he will choose a red card?

A. 1/4
B. 1/6
C. 1/2
D. 5/6

[10 points, algebra 2-simplifying complex fractions]according to my answer key the restrictions are -1 and 4. but why not positive 1?

Circle a has a diameter of 7 inches, a circumference of 21.98 inches, and an area of 38.465 square inches. the diameter of circle b is 6 inches, the circumference is 18.84 inches, and the area is 28.26 square inches. part a: using the formula for circumference, solve for the value of pi for each circle. (4 points) part b: use the formula for area and solve for the value of pi for each circle. (4 points)

Change negative exponents to positive. then solve. round to four decimal places