Answer:
![t \approx 0.43\,s](https://tex.z-dn.net/?f=t%20%5Capprox%200.43%5C%2Cs)
Step-by-step explanation:
The vertical displacement function is
, where
is measured in meters and
in seconds. Ball hits the ground when
. That is:
![-4.9\cdot t^{2}-3.5\cdot t + 2.4 = 0](https://tex.z-dn.net/?f=-4.9%5Ccdot%20t%5E%7B2%7D-3.5%5Ccdot%20t%20%2B%202.4%20%3D%200)
Whose roots can be found by using the General Formula for Second-Order Polynomials:
![t_{1,2} = \frac{3.5\pm \sqrt{(-3.5)^{2}-4\cdot (-4.9)\cdot (2.4)} }{2\cdot (-4.9)}](https://tex.z-dn.net/?f=t_%7B1%2C2%7D%20%3D%20%5Cfrac%7B3.5%5Cpm%20%5Csqrt%7B%28-3.5%29%5E%7B2%7D-4%5Ccdot%20%28-4.9%29%5Ccdot%20%282.4%29%7D%20%7D%7B2%5Ccdot%20%28-4.9%29%7D)
Solutions of this polynomial are:
![t_{1} \approx 0.43\,s,t_{2} \approx -1.14\,s](https://tex.z-dn.net/?f=t_%7B1%7D%20%5Capprox%200.43%5C%2Cs%2Ct_%7B2%7D%20%5Capprox%20-1.14%5C%2Cs)
Only the first root is physically consistent.
Answer:
2.5 overtime hours
Step-by-step explanation:
90$+195$=285
390-285=105$
105/42=2.5 overtime hours
Well if you have the coordinates (2,2) and (4,4) you plug in the y from the second cords for y2
So it would be 4-2/4-2 and 2/2 equals 1
1 would be the m in y=MX+b
Then plug one set of coords in y=MX+b
2=1x+b
I know it's confusing to understand but I tried lol
Answer:
Area of parallelogram= base × perpendicular height
base= 20cm height= 13
Area= 20cm×13cm
Area= 260cm²
Therefore the area of the parallelogram is 260cm²
no one said it is not true or false and it doesn’t look good for the people