<span> -9x4 + 5x2 - 26x - 12
—————————————————————
3
</span>
<h3>Answer: 71</h3>
==================================
Explanation:
Multiply the values in the second and third columns. Do this row by row.
Row1: 50*55 = 2750
Row2: 75*32 = 2400
Row3: 150*13 = 1950
Add up the products to get 2750+2400+1950 = 7100
Then divide this by the total frequency 55+32+13 = 100 to get 7100/100 = 71
We need to find the triangular pyramid formula which is 1/3*B*H
The base is always the bottom or foundation. To find this we need the area of the triangle at the bottom.
It is 8*6/2 or base times height divided by 2
We would get 24
This is our B value. Now height is 4 in they give us this.
Plug it in 24*4/3
We get 32 inches
Well the average male height is 5'10 and average female height is 5'4
