Which statement describes the domain of the function f(x)=3x/4x(x)-4

Find the sum of the following series. round to the nearest hundredth if necessary.

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.

If 25% of y is 30, what is 60% of y?