Answer:
loudness of a jack hammer .004 loudness of a compactor .0025
Step-by-step explanation:
Because edge
Answer:
72cm
Step-by-step explanation:
A=a^2
p=4a
p=4√A=4x√324=72 cm
Answer:
19
Step-by-step explanation:
There will be 73 apples in each basket,
to solve this you divide 219 into three.
Hope this helped!!
Answer:
Both of those are functions.
Step-by-step explanation:
is a parabola that opens up.
Any upward or downward parabola is a function because they pass the vertical line test.
![x=\pm \sqrt{1-y}{/tex]Square both sides:[tex]x^2=1-y](https://tex.z-dn.net/?f=x%3D%5Cpm%20%5Csqrt%7B1-y%7D%7B%2Ftex%5D%3C%2Fp%3E%3Cp%3ESquare%20both%20sides%3A%3C%2Fp%3E%3Cp%3E%5Btex%5Dx%5E2%3D1-y)
Subtract 1 on both sides:

Multiply both sides by -1:

So this is a another parabola and it is faced down. So this is also a function.
wit
willl always be a parabola.
If
then it is open up.
If
then it is open down.
Upwards and downward parabolas will always be functions.
are also parabolas but these open to the left or right. These will not be functions because they will not pass the vertical line test.