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It is given thatthe dance routine must last 4 minutes.

The variation allowed is$卤5\text{seconds}$.

Let the time allowed for the dance routine be $x$.

Therefore,

$$\begin{gathered} \text{x}=\text{4尘颈苍耻迟别蝉卤5蝉别肠辞苍诲蝉} \\ \text{x}=\left(\text{4min-5sec}\right)\text{orx}=\left(\text{4min+5sec}\right) \\ \text{x}=\text{3minutes55secondsorx}=\text{4minutesand5seconds} \end{gathered}$$

The least possible time for the routine will be 3 minutes 55 seconds.

The greatest possible time for the routine will be 4 minutes 5 seconds.

It is given that thedance routine must last 4 minutes.

The variation allowed is$卤5\text{seconds}$.

Let the time allowed for the dance routine be $x$. Therefore,

$$\begin{gathered} \text{x}=\text{4尘颈苍耻迟别蝉卤5蝉别肠辞苍诲蝉} \\ \text{x}=\left(\text{4min-5sec}\right)\text{orx}=\left(\text{4min+5sec}\right) \\ \text{x}=\text{3minutes55secondsorx}=\text{4minutesand5seconds} \\ \text{x}=\text{3}\left(60\right)+55\text{secondsorx}=\text{4}\left(60\right)+5\text{seconds} \\ \text{x}=\text{180+55secondsorx}=\text{240+5seconds} \\ \text{x}=\text{235secondsorx}=\text{245seconds} \end{gathered}$$

The least possible time for the routine in seconds will be 235 seconds.

The greatest possible time for the routine in seconds will be 245 seconds.