At the moment a certain medicine is injected, it’s concentration in the bloodstream is 120 milligrams per liter. From that moment forward, the medicine’s concentration drops 30% each hour. Write a function that gives the medicine’s concentration in milligrams per liter, c(t),t hours after the medicine was injected.

For which rational expression is -2 an excluded value of x?

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).

Graph the system of inequalities presented here on your own paper, then use your graph to answer the following questions: y > 2x + 3y is less than negative 3 over 2 times x minus 4part a: describe the graph of the system, including shading and the types of lines graphed. provide a description of the solution area. (6 points)part b: is the point (â’4, 6) included in the solution area for the system? justify your answer mathematically. (4 points)