Expression is equivalent to t 3^7x 3^-4

The height of a flare fired from the deck of a ship in distress can be modeled by h(t)= -2(8t^2-52t-28), where h is the height of the flare above water and t is the time in seconds. a. find the time it takes the flare to hit the water.

How can constraints be used to model a real-world situation?

In the equation sqrt(n+5)-sqrt(11-10)=1. what is the value of n