Answer:7.) C 8.) A
Step-by-step explanation:
For the first one it's 90.5, I know cause I just took the test and it's right. The second one I'm not sure..
Answer:
Step-by-step explanation:

Answer:
The maximum height is 46.64 feet.
Step-by-step explanation:
If we take the derivative of h whit respect to t and equal this to zero we would find the value of t which corresponds to the maximum h.
So, we have the function h(t):

Taking the derivative, we have:

Now, we solve it for t:

Finally, we put this value of t into the original equation.

Therefore, the maximum height is 46.64 feet. All the given options are wrong, the one that comes closest is option A.
I hope it helps you!