+0

# Stem and leaf plot

0
76
1

The 100-yard dash race-times, in seconds, for the Johnston Middle School track team are:

13.9, 13.2, 12.7, 16.3, 14.5, 14.7, 12.9, 14.0, 13.5, 12.9, 13.7

If Kathy finished 0.4 of a second slower than the first-place finisher, how long did it take her to finish the race? Represent the data, including Kathy's, using a stem-and-leaf plot.

What fraction of the racers completed the 100-yard dash faster than 14 seconds?

How many seconds faster is the first-place finisher than the last-place finisher? What is the combined race time of the first-, second-, third-, and fourth-place finishers? Justify your reasoning.

Apr 8, 2021

#1
+321
0

It took Kathy 13.1 sec

and 3 racers finished faster than 14 sec and there are 11 racers not including Kathy so if you're including her the fraction would be 1/4 not including her would be 3/11

well, the first-place finisher had a time of 12.7 and the last place finisher had a time of 16.3 so... 16.3 - 12.7 is 3.6

the first place was 12.7
second place was12.9
third place was also 12.9
fourth place was 13.2
so we just add all of them up and get 51.7

Apr 8, 2021