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## PRACTICE PROBLEM SET 13 Now try these problems. The answers are in Chapter 23, starting on page 508. 5. If the position function of a particle is
x
(
t
)
=
t
2
+
8
t
,
t
>
0
x(t)=t^{2}+8 t, t>0
x
(
t
)
=
t
2
+
8
t
,
t
>
0
, find the distance that the particle travels from
t
=
0
t=0
t
=
0
to
t
=
4
t=4
t
=
4
.
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