Given:
square shape
Perimeter 28 feet
Find its area
A square has 4 equal sides, so perimeter is 4a
Perimeter = 4a
28 ft = 4 a
28 ft / 4 = a
7 = a
One side of the the square is 7 ft.
Area of a square is the measure of one side raised to the power of 2.
A = a²
A = (7 ft)²
A = 49 ft²
Answer:
i know what you can do
go to jupiter to get more stupider
Step-by-step explanation: #6 yr old burns
#ameture hour
SOLUTION
The mean is 4min
standard deviation is 1min
the z score is
![z=\frac{x-\bar{x}}{\sigma}](https://tex.z-dn.net/?f=z%3D%5Cfrac%7Bx-%5Cbar%7Bx%7D%7D%7B%5Csigma%7D)
where
![\begin{gathered} x=3 \\ \bar{x}=4 \\ \sigma=1 \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%20x%3D3%20%5C%5C%20%5Cbar%7Bx%7D%3D4%20%5C%5C%20%5Csigma%3D1%20%5Cend%7Bgathered%7D)
then we have
![\begin{gathered} z=\frac{3-4}{1}=\frac{-1}{1}=-1 \\ z=-1 \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%20z%3D%5Cfrac%7B3-4%7D%7B1%7D%3D%5Cfrac%7B-1%7D%7B1%7D%3D-1%20%5C%5C%20z%3D-1%20%5Cend%7Bgathered%7D)
The probability the call lasted less than 3 min will be
Therefore, the probability that (z < -1 ) is
[tex]\begin{gathered} Pr(z<-1)=Pr(0
Hence, the percentage of the calls that lasted less than 3 min is 16%
91/25, 3.92, 3.928, 2 13/20
im pretty sure this is correct AND IM RLY SRY IF IT ISN’T