Lena is playing her accordion by compressing and stretching it. The accordion's length (in $\text{cm}$) $t$ seconds after it's completely stretched is modeled by $A(t)$. Here, $t$ is entered in radians.
>$A(t) = {25}\cos\left(\pi t\right) + 65$
**How long does it take Lena to compress the accordion completely and then stretch it back out to a length of $50\text{ cm}$?**
*Round your final answer to the nearest tenth of a second.*
[[☃ numeric-input 1]] seconds