1. A world-class mile runner can run 1 mi in a time of 4 min. What is the runner's average speed in units of mi/h and m/s?

2. How many seconds are there in the month of July?

3.

- 2.43 The standard acceleration of gravity at the earth's surface is g = 9.81 m/s2. Convert this acceleration to units of ft /h* and mi /s>