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## PRACTICE PROBLEM SET 13 Now try these problems. The answers are in Chapter 23, starting on page 508. 4. If the position function of a particle is
x
(
t
)
=
3
t
2
+
2
t
+
4
,
t
>
0
x(t)=3 t^{2}+2 t+4, t>0
x
(
t
)
=
3
t
2
+
2
t
+
4
,
t
>
0
, find the distance that the particle travels from
t
=
2
t=2
t
=
2
to
t
=
5
t=5
t
=
5
.
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