we are given
![f(d)=-0.6d^2+5.4d+0.8](https://tex.z-dn.net/?f=f%28d%29%3D-0.6d%5E2%2B5.4d%2B0.8)
where
d is the horizontal distance the ball traveled in yards
f(d) is the height, in yards of the ball at d horizontal yards
Initial height:
For finding initial height , we can plug d=0
![f(0)=-0.6(0)^2+5.4(0)+0.8](https://tex.z-dn.net/?f=f%280%29%3D-0.6%280%29%5E2%2B5.4%280%29%2B0.8)
![f(0)=0.8](https://tex.z-dn.net/?f=f%280%29%3D0.8)
So, initial height is 0.8 yard
Initial Velocity:
We can find derivative
![f'(d)=-0.6\times 2d+5.4\times 1+0](https://tex.z-dn.net/?f=f%27%28d%29%3D-0.6%5Ctimes%202d%2B5.4%5Ctimes%201%2B0)
![f'(d)=-1.2d+5.4+0](https://tex.z-dn.net/?f=f%27%28d%29%3D-1.2d%2B5.4%2B0)
now, we can plug d=0
![f'(0)=-1.2(0)+5.4+0](https://tex.z-dn.net/?f=f%27%280%29%3D-1.2%280%29%2B5.4%2B0)
![f'(0)=5.4](https://tex.z-dn.net/?f=f%27%280%29%3D5.4)
so, initial velocity is 5.4 yard vertically / yard horizontally
Hence , option-B.......Answer
Canada is 24 in a ratio of 1:8
Answer:
5 , 7 , 8 represent the side of acute angled triangle
He needs 75 scoops of powder.
Because 10/2= 5, so you would multiply 15 by 5 to get 75