Find f(-2) if f(x) = 4x + 8

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.

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.