10. Consider the graph below: 1006- 900 800 700 600 500 400 300 200 100 -10 X 10 20 30 40 50 60 70 80 90 100 a) What is the equation of the function? b) Find the value of A if t is 10. c) At what value(s) of t is A equal to 280? 11. Write each as a logarithmic expression. a) 35 = 243 b) a4 = 25