Please help me figure out what I have incorrect in parts b and c, thank you! The

Question

Please help me figure out what I have incorrect in parts b and c, thank you!

The position of a moving particle is given by the position function f)--7-2-0.4+0.14,0sts8 Estimate values from the graphs to answer the following questions. (a) At what time does the particle reverse direction? (Round your answer to one decimal place.) t = 4.8 (b) When is the displacement positive? (Round your answer to one decimal place. Enter your answer using interval notation.) (6.9, 00)x When is the displacement negative? (Round your answer to one decimal place. Enter your answer using interval notation.) (0, 6.9) (c) When is the particle's acceleration positive? (Round your answer to one decimal place. Enter your answer using interval notation.) (2.6, 0o) x When is the particle's acceleration negative? (Round your answer to one decimal place. Enter your answer using interval notation.) (0,2.6) (d) Write equations for the velocity and acceleration functions f"(t) = -2-2.41+ 1.2t

Explanation / Answer

Domain of the given function is [0,8], so we can't have the values greater than 8 in any part of the solution.

That's why, displacement is positive for (6.9, 8) <-- part b

and acceleration is positive for (2.6, 8) <-- part c

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