For questions 20 through 23, use the graph below. 20. Is this the graph of a one to one function? How do you know?

21. what is the range of this function?

22. what is f(-1)?

23. what is f(3)?

1. what is the formula for finding the vertical distance between two points on a coordinate plane?

Use the radius you found in part i (r=26.8 cm) with the surface area formula below to find the surface area of the sphere. show your work and round your answer to the nearest tenth. the surface area of a sphere: sa = 4πr^2 self note: 3.8.4

Tom drove 206 miles in 3.9 hours. estimate his average speed.