Determine the sum of the given probabilities. are the events complementary? p(a) =3/7 ; p(b) = 2/7 a. 5/14 the events are complementary. b. 5/14 the events are not complementary. c. 5/7 the events are complementary. d. 5/7 the events are not complementary.

i leave the calculator work to you.

7. diameter 4 miles, circumference 4π miles

8. radius 0.2 miles, circumference 0.4π miles

[this is a bad problem because the actual radius of a car on the track is less than 0.2 miles so the answer is less than 0.4π miles]

9. radius 6 feet, circumference 12π feet

10. diameter 14 cm, circumference 14π cm

11. diameter 4.8 feet, circumference 4.8π feet