$($Macha $)$ Reb $1\mathrm{.}3$ Homework Question $12,11\mathrm{.}3\mathrm{.}23$ HW Score: $61\mathrm{.}57\%,10\mathrm{.}47$ of Points: $0$ of $1$ Suppose the position of an object moving in a straight line is given by s$($t$)=5$t$^(2)+4$t$+3.$ Find the instantaneous velocity when t$=6.$ The instantaneous velocity at t$=6$ is