Suppose a particle$$s position is given by$()=4$f$($t$)=$t$4,$ where$$t$$is measured in seconds and$()$f$($t$)$is given in centimeters. What is the velocity of the particle when$=3$t$=3?$

Select one:

a$.$

$=81/$v$=81$cm$/$sec

b$.$

$=108/$v$=108$cm$/$sec

c$.$

$=324/$v$=324$cm$/$sec

d$.$

$=1728/$