If log(x-3) = 2, find x. A. 103 B. 97 C. 7 D. 13 4. Which of the following shows the graph of y = log x? A. B. C. D. fee for your of (1, 0) (1, 0) (0, 1) (0, 1) X 1 ažb³ 7. (a) Simplify3 a 2b4 (b) Solve 2x-1 = 64 and give the answer with positive indices. DFS Foundation Mathematics I (ITE3705) 8. It is given that y varies directly as x². When x = 4, y = 64. (a) Express y in terms of x. (b) Find y if x =3. (c) Find x if y=100. 10. The table shows the test results of 6 students in DFS Mathematics. Draw a bar chart for the table. Students Peter Ann May John Joe Marks 15 32 38 21 27 Sam 12 (7 marks) 11. The profit (SP) of selling a mobile phone is partly constant and partly varies directly as the number of phones (n) sold. When 20 phones were sold, the profit will be $3,000. When 25 phones were sold, the profit will be $5,400. (a) Express P in terms of n. (9 marks) (b) Find the profit when 40 phones were sold. (3 marks) (c) Find number of phones were sold if the targets profit is $23,640?