In each of the calculations below, show y your answer? your work. how did you get t curve c be defined parametrically by ru)- (i. e', sin t). in the book's pr eferred notation that is r(t) ti+ e'j+sin(t) k. calculate r(1) and r" what is the spced at t 0 an acceleration at t 0? 2. is the curve in q1 parameterized by arc length? know. (hint, you could compare the velocity and acce 3. calculate r(t)t

Jeffery conducted a survey in his school and found that 30 of the 50 eighth grade students' favorite subject is mathematics. based on the results, jeffery concluded that out of the 200 students in his school, 120 students' favorite subject is mathematics. select the statement that is true about jeffery's conclusion. a. jeffery's conclusion is not valid because the sample was biased since only 200 students were surveyed. b. jeffery's conclusion is valid because the sample was random since all of the students were eighth grade students. c. jeffery's conclusion is valid because the sample was random. d. jeffery's conclusion is not valid because the sample was biased since all of the students were eighth grade students.

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

How many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.