Help me do section 9-4, page 578, exercises 12, 14, 18, 20, 24, 26

EXERCISES Practice Write each equation in polar form. Round & to the nearest degree. 12. 7x - 24y + 100 - 0 13. 21x + 20y - 87 14. 6x - By - 21 15. 3x + 2y - 5 -0 16. 4x - 5y - 10 17. -x + 3y - 7 Write each equation in rectangular form. 18.6 - rcos (0 - 120) 19. 4 - rcos 8+ 20.2 - rcos (8 + #) 21. 1 - roos (0 - 3307) 22. r - 11 sec (8 + 23. r - 5 sec (8 - 60) Graph each polar equation. 24. 6 - rcos (0 - 45) 25. 1 - FOOS 8- 26.2 - rcos (8 + 603) 27. 3 - roos (0 + 90") 28.r - 3 sec (0+ 29. r - 4 sec 0 - 30. Write the polar form of the equation of the line that passes through points with rectangular coordinates (4, - 1) and (-2, 3). 31. What is the polar form of the equation of the line that passes through points with polar coordinates (3, 7 ) and (2. " )? Applications 32. Biology Refer to the application at the and Problem beginning of the lesson. Suppose the Solving Buridan Paradigm tracks a fruit fly whose path is modeled by the polar equation r - 6 sec (6 - 15), where r is measured in centimeters. a. How close did the fly come to the origin? b. What were the polar coordinates of the fly when it was closest to the origin? 33. Critical Thinking Write the polar forms of the equations of two lines, neither of which is vertical, such that the lines intersect at a 90 angle and have normal segments of length 2. 578 Chapter 9 Polar Coordinates and Complex Numbers www.amc.glencoe.com/self_check_quiz CONTENTS