Mark as Complete 1. In s ABC, ZC is a right angle and BC = 7. If mZB- 30 , find AC. (1 point) OOOO 2. Which of the following angles has a reference angle of ? (1 point) 8 5177 8 8 3371 8 O 27 71 8 3, Your town's public library is building a new wheelchair ramp to its entrance. By law, the maximum angle of incline for the ramp is 4.76. The ramp will have a vertical rise of 2.5 ft. What is the shortest horizontal distance that the ramp can span? (1 point) O11.9 ft. 30.0 ft. 04.3 ft. O19.1 ft. Course Course Outline Tools PRE CALC B Mark as Complete V 13. Which polar equation represents an ellipse? (1 point) 3 Or= 2-5 sin 8 2 Or= 2-sin 8 4 Or = = 3 + 3cose Or= 5 3+4 cos 8 14. Use DeMoivre's Theorem to find | 3cis . (1 point) 27 3 27; 2 2 0 9V/3 9 2 2 27i Ogi 15. Which of the following points could be the initial point of vector v if it has a magnitude of 10 and the terminal point (-1,5)? (1 point) O (-0.1,0.5) O ( 2, 4 ) O(-11,-5) O (-7,-3) page 1 of 2Mark as Complete ( 16. Given vectors u = (-6,4) and v = (3,6), determine if the vectors are orthogonal. If they are not orthogonal, find the angle between the two vectors. (1 point) The vectors are orthogonal. The vectors are not orthogonal. The angle between the two vectors is 49.40. The vectors are not orthogonal. The angle between the two vectors is 79.0. .The vectors are not orthogonal. The angle between the two vectors is 82.90. W u -3 -2 1 .0 1 2 3 4 5 6 7 -2 page 1 of 2Outline Tools Mark as Complete V W u -3 -2 -1,0 1 2 3 4 5 6 7 Use the graph to answer the question. 17. Which statement matches the vector operation shown on the coordinate grid? (1 point) Ov+ w = u for v = 6i + 5j, w = 2i -4j, and u = 8i + j Ovt w - u for v = 6i + 5j, w = 2i -4j, and u = 4i + 9j Ovtu - w for v = 6i + 5j, u = 8i + j, and w = 2i -4j Ovtu - w for v = 6i + 5j, u = 8i + j, and w = 14i + 6j