1. The heights of 9 students of a class are as follows (in cm): 155, 160, 145, 150, 147, 152, 144 148
a. Find the average height of the students in this class.
b. Is this a sample or a population? Explain
c. What is the mean absolute deviation of this data set?

Show your work
I really need help this is an important grade please

8121 because

130,000 divided by 16 is 8121

step-by-step explanation:

there is a formula i can give you:

it is r^2*n*sin(360/n) divided by 2 where r represents the "radius" and n is the number of sides.

plug them in:

(10sqrt(3))^2*6*sin(360/6) divided by 2

100*3*6*sin(60) divided by 2

900*sin(60)

900*sqrt(3)/2

450*sqrt(3)

approx is 779.4 cm^2

it has changed from the width and the height.

step-by-step explanation:

180°

step-by-step explanation:

sum of equilateral triangle=180°

< n=60°

< m=120°°[angle supplementary of equilateral angle]

< m+< r+< x=360°(sum of exterior angle of triangle)