Mean of a data = Sum of all observations ÷ Total number of observations
Mean of this data will be :
Sum of all observarions = 17 + 13 + 18 + 20 + 17 + 15 + 12 = 112
Total number of observations = 7
Mean = 112 ÷ 7
Mean = 16
Therefore the mean of this data set <em>=</em><em> </em><em>1</em><em>6</em><em> </em>

<span>
base1= 158.802
</span>

<span>
base2=596.008
the distance travelled = 596.008 - 158.802
= 438 m</span>
Use cos^-1(0.6157) and u might find the answer
24 sponge fingers and 420 jelly