MATH 117 EXTRA PRACTICE

Graph the following parabola. Find the vertex, the axis of symmetry, the x intercepts, y intercept.

	vertex______ axis_______, x intercepts________ y intercepts_______	34)

Graph the equation .

36) Find the equation of a parabola with vertex at (2, -3) and containing the point (3, -1)

Solve .

37) A projectile is thrown upward so that its distance above the ground after t seconds is h = -12t2 + 336t. After how many seconds does it reach its maximum height?
38) The length and width of a rectangle have a sum of 88. What dimensions give the maximum area?

Answer Key
Testname: PRACTICE EXAM 4 CHAPTER 11 F'07T

13) 0.333, 3
14) 13 cm
15) cm
16) Two rational solutions
17) Two imaginary solutions
18)
19) 5 and 7 or -5 and -7
20) 8m by 15 m
21) 8, 9
22) (6, 0), (0, 36)
23) No x- intercepts , (0, -12)
24) 6, 10
25) 9

27) 15 hr; 30 hr
28) Bike: 12 mph; hike: 2 mph
29) Opens upward; V(-1, 2) axis x = -1
30) Opens downward; V(-9, -4), axis of symmetry x = -9

Axis of symmetry is x = -6.

34) Vertex (3, -1), axis x = 3, x int (4, )), (2, 0), y intercept (0, 8)

37) 14 sec
38) Length 44 and width 44