For the squeegee to pass by another window washer working at a height of 20 feet, it will take the squeegee 1.6 seconds.
<h3>Squeegee passage:</h3>
Using this model: h(t)= h0-16t²
Where:
h(t)=20
Let plug in the formula
60-16t²=20
-16t²=-40
t²=10÷4
t=±√10÷4
t=±√10÷2
t=3.16÷2
t=1.58 seconds
t=1.6 seconds (Approximately)
Inconclusion for the squeegee to pass by another window washer working at a height of 20 feet, it will take the squeegee 1.6 seconds.
Learn more about height here:brainly.com/question/9485362
Dont worry...first one..-12
Step 1
<u>Find the slope of the line PQ</u>
we know that
the formula to calculate the slope between two points is equal to
![m=\frac{y2-y1}{x2-x1}](https://tex.z-dn.net/?f=m%3D%5Cfrac%7By2-y1%7D%7Bx2-x1%7D)
we have
![P(-3,-3)\\Q(3,-1)](https://tex.z-dn.net/?f=P%28-3%2C-3%29%5C%5CQ%283%2C-1%29)
substitute the values
![m=\frac{-1+3}{3+3}](https://tex.z-dn.net/?f=m%3D%5Cfrac%7B-1%2B3%7D%7B3%2B3%7D)
![m=\frac{2}{6}](https://tex.z-dn.net/?f=m%3D%5Cfrac%7B2%7D%7B6%7D)
![m=\frac{1}{3}](https://tex.z-dn.net/?f=m%3D%5Cfrac%7B1%7D%7B3%7D)
Step 2
Find the equation of the line that passes through point R ans is parallel to line PQ
we know that
If two lines are parallel, then their slopes are the same
The equation of the line into point-slope form is equal to
![y-y1=m(x-x1)](https://tex.z-dn.net/?f=y-y1%3Dm%28x-x1%29)
we have
![m=\frac{1}{3}](https://tex.z-dn.net/?f=m%3D%5Cfrac%7B1%7D%7B3%7D)
![(x1,y1)=R(1,1)](https://tex.z-dn.net/?f=%28x1%2Cy1%29%3DR%281%2C1%29)
substitute the values
![y-1=\frac{1}{3}(x-1)](https://tex.z-dn.net/?f=y-1%3D%5Cfrac%7B1%7D%7B3%7D%28x-1%29)
Step 3
we know that
The point on the y-axis that is on the line
is equal to the y-intercept of the line
The y-intercept is the value of y when the value of x is equal to zero
so
For
find the value of y in the linear equation
![y-1=\frac{1}{3}(0-1)](https://tex.z-dn.net/?f=y-1%3D%5Cfrac%7B1%7D%7B3%7D%280-1%29)
![y-1=-\frac{1}{3}](https://tex.z-dn.net/?f=y-1%3D-%5Cfrac%7B1%7D%7B3%7D)
![y=1-\frac{1}{3}](https://tex.z-dn.net/?f=y%3D1-%5Cfrac%7B1%7D%7B3%7D)
![y=\frac{2}{3}](https://tex.z-dn.net/?f=y%3D%5Cfrac%7B2%7D%7B3%7D)
The point that is on the y-axis is ![(0,\frac{2}{3})](https://tex.z-dn.net/?f=%280%2C%5Cfrac%7B2%7D%7B3%7D%29)
therefore
<u>the answer is the option A</u>
![(0,\frac{2}{3})](https://tex.z-dn.net/?f=%280%2C%5Cfrac%7B2%7D%7B3%7D%29)
see the attached figure to better understand the problem
Answer:
280ft
Step-by-step explanation:
360/18=20
20x14=280
Answer:
Noah because he is the alpha and he like to be dominated