NOVA NVCC Spring 2023 Northern Virginia Community College Home Press F11 to exit full screen D Question 9 1 pts Announcements Account Assignments The position vector of a particle is r(t). Find the requested vector. Discussions Dashboard Grades 4 The acceleration at t = 1 for r(t) = (4t - 3t+)i + (8 - t)j + (3+2 - 5t)k Courses People O a(1) = -361 - j + 6k 128 Pages O a(1) = -361 + 6k Groups Files O a(1) = -91 + 6k 1898 Syllabus Calendar O a(1) = 361 + 6k 31 Quizzes Inbox Modules Collaborations D Question 10 1 pts History New Analytics Course Evaluations Calculate the arc length of the indicated portion of the curve r(t). Studio Purchase Course Materials r(t) = cos' ti + sin'tj + 0 k, Osts n/2 (Hypocycloid example 2 of 11.8) Help NOVA Policies O 2/3 Tutor.com: 24/7 0 3 Online Tutoring Library Resources O 1/3 Career Connection O 3/2 Zoom K