Answer:
Given : Few Distributions Mean & Standard Deviation.
To find : normal distribution which has the greatest standard deviation.
Solution:
=> Distribution 4 has the greatest standard deviation.
Graph at top has more spread hence more standard deviation.
The ans is:
cos 20 =x/80
x=75.2
1st...
80 * 115
P = 2 * 80 + 2 * 115
P = 160 + 230
P = 390 is the perimeter
A = 80 * 115
A = 9, 200 is the area.
I could only get the first part done for you maybe others are watching where they can help you with the second part of the question:::
Hope that helps!!!!