<h3>
Answer:</h3>
<u>If AB = 12units, then</u>
- A'B' = 1/2 × 12 = 6units.
<u>If C'D' = 5units, then</u>
Answer:
$3
Step-by-step explanation:
Original price - Discounted price
= $15 - ($15 × 80%)
= $15 - ($15 × 80/100)
= $15 - ($1200/100)
= $15 - $12
= <u>$</u><u>3</u>
So, the sale price is $3
<em>Hope it helps and is useful</em><em> </em><em>:</em><em>)</em>
Draw whats on the paper, thats your answer
Answer:
The maximum height that the ball will reach is 81 ft
Step-by-step explanation:
Note that the tray of the ball is given by the equation of a parabola of negative main coefficient. Then, the maximum value for a parabola is at its vertex.
For an equation of the form
![at ^ 2 + bt + c](https://tex.z-dn.net/?f=at%20%5E%202%20%2B%20bt%20%2B%20c)
So
the t coordinate of the vertice is:
![t =-\frac{b}{2a}](https://tex.z-dn.net/?f=t%20%3D-%5Cfrac%7Bb%7D%7B2a%7D)
In this case the equation is:
![h(t)=72t-16t^2](https://tex.z-dn.net/?f=h%28t%29%3D72t-16t%5E2)
So
![a=-16\\b=72\\c=0](https://tex.z-dn.net/?f=a%3D-16%5C%5Cb%3D72%5C%5Cc%3D0)
Therefore
![t =-\frac{72}{2(-16)}](https://tex.z-dn.net/?f=t%20%3D-%5Cfrac%7B72%7D%7B2%28-16%29%7D)
![t=2.25\ s](https://tex.z-dn.net/?f=t%3D2.25%5C%20s)
Finally the maximum height that the ball will reach is
![h(2.25)=72(2.25)-16(2.25)^2](https://tex.z-dn.net/?f=h%282.25%29%3D72%282.25%29-16%282.25%29%5E2)
![h=81\ ft](https://tex.z-dn.net/?f=h%3D81%5C%20ft)