Let $p(t)=-0.0390 t^{2}+0.229 t$ be the density function for the shelf life of a brand of banana which lasts up to 4 weeks. Time, $t$, is measured in weeks and $0 \leq t \leq 4$. * Your answer is incorrect. Find the mean shelf life of a banana using $p(+)$. Round your answer to one decimal place. Mean $=$ eTextbook and Media HintCS.SD. 1201