Need !
a projectile is thrown upward so that its distance above the ground after t seconds is given by the function h(t) = -16t2 + 640t. after how many seconds does the projectile take to reach its maximum height? show your work for full credit.

Myron put $5000 in a 2-year cd playing 3% interest, compounded monthly. after 2 years, he withrew all his money. what was the amount of the withdrawal?

The map shows the location of the airport and a warehouse in a city. though not displayed on the map, there is also a factory 112 miles due north of the warehouse.a truck traveled from the warehouse to the airport and then to the factory. what is the total number of miles the truck traveled?

In which direction does the left side of the graph of this function point? f(x) = 3x3 - x2 + 4x - 2