Solve Each Problem $\mathrm{ft} / \mathrm{s}$ ) Is Given By $\mathrm{v}=\mathrm{t}^{2}-8 \mathrm{t}+3$

Multiple Choice

Solve each problem.
-The velocity of a particle (in $\mathrm{ft} / \mathrm{s}$ ) is given by $\mathrm{v}=\mathrm{t}^{2}-8 \mathrm{t}+3$ , where $\mathrm{t}$ is the time (in seconds) for which it has traveled. Find the time at which the velocity is at a minimum.

A) $3 \mathrm{~s}$
B) $1.5 \mathrm{~s}$
C) $8 \mathrm{~s}$
D) $4 \mathrm{~s}$