the answer is D because it is the only answer that was clearly defined in the question.
Hope this helps! if it didn't, let me know in the comments! have a great day!
D.perpendicular cross section of a pyramid cone
<u>The general equation that represents height of the t-shirt as a function of time:</u>
![64/4=16 \\f(t)= -16t^{2} +64t+5](https://tex.z-dn.net/?f=64%2F4%3D16%20%5C%5Cf%28t%29%3D%20-16t%5E%7B2%7D%20%2B64t%2B5)
<u>The maximum height of the t-shirt:</u>
<u />
<u />
<u>How long will it take the t-shirt to reach its maximum height:</u>
2 seconds
<u>How long does it take for the t-shirt to reach the crowd:</u>
<u />![49=-16t^{2} +69t+5\\o=-16t^{2}+69t-30\\\\\frac{-64+\sqrt[]{-64^{2-4(-16)(-30)}} }{2(-16)} = .54](https://tex.z-dn.net/?f=49%3D-16t%5E%7B2%7D%20%2B69t%2B5%5C%5Co%3D-16t%5E%7B2%7D%2B69t-30%5C%5C%5C%5C%5Cfrac%7B-64%2B%5Csqrt%5B%5D%7B-64%5E%7B2-4%28-16%29%28-30%29%7D%7D%20%7D%7B2%28-16%29%7D%20%3D%20.54)
or
![seconds](https://tex.z-dn.net/?f=seconds)
<u>The range of this graph in inequality and interval notation:</u>
<u />
<u />
Answer:
8x^2 +5x -3
Step-by-step explanation:
(3x^2-2)+(5x^2+5x-1)
I like to line them up vertically
3x^2 -2
+5x^2+5x-1
------------------------
8x^2 +5x -3