Question

Five runners are entered into a competition. Four of the runners have had their turns. Their

completing times are 7.4 s, 7.75 s, 7.09 s, and 7.86 s. What time must the last runner get in order to win
the competition?

Answer 1

Just writing anything above these numbers

Explanation:

Answer 2

let t be winning time t < 7.09 seconds

Explanation:

let's first order the times from least to greatest:

7.09, 7.40, 7.75, and 7.86

Now, in order to have the winning time, the last runner must have a time less than the fastest runner so far. So, the winning time is less than 7.09 seconds.

Make sure to add units. I know that my teachers are REALLY picky about that, though yours may not care.