The function s(t) describes the motion of a particle along a line. s(t) = t2 − 14t + 22 (a) find the velocity function v(t) of the particle at any time t ≥ 0. v(t) = 2t−14 (b) identify the time interval(s) in which the particle is moving in a positive direction. (enter your answer using interval notation.) (7,∞) (c) identify the time interval(s) on which the particle is moving in a negative direction. (enter your answer using interval notation.) (−7,7) (d) identify the time(s) at which the particle changes direction. (enter your answers as a ,-separated list.) t =

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day

the inner core.

good luck: )

klicker