PLEASE I NEED HELP! 1.) A brick is dropped off a building. Its path can be modeled by h(t)=-16t^2+144 , where h(t) is the height in feet after ‘t’ seconds. Awnser the following questions algebraically

1a.) how tall is the building?

2a.) when did it hit the ground?

3a.) what was the height at 2 seconds?
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2.)Tiffany makes custom skateboards. Her profit can be modeled by p(x)=-15x^2+3780x-176700 , where x is the price she charges and p(x) is her profit. Awnser the following questions algebraically.

1a.)what should she charge to maximize her profits?

2a.)what will her maximum profit be?

3a.)what would he profit be if she charged $100?

Any and all help would be appreciated! :)