Can anyone please help me with this please

1. A rocket carrying fireworks is launched from a hill 80 feet above a lake. The rocket

will fall into lake after exploding at its maximum height. The rocket's height above

the surface of the lake is represented by h = – 16+ 64 t + 80. How many

seconds after the rocket launched will it hit the lake?

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

How do i make someone brainliest? (if you answer me, i might be able to make you brainliest! )

Lv beethoven software supplies customized software to a managed healthcare system. lv beethoven software's costs for the software is $1,723,000. lv beethoven software sells the software to the healthcare system for $3,816,981.10. overhead expenses are estimated at 47% of the selling price. what is lv beethoven software's net profit to the nearest dollar?