please help now

It is 0.87 miles from your house to school. You walk 4 miles per hour.

If you leave your house at 7:10am,

what time will you arrive at school?

$\begin{array}{|rcll|} \hline && 0.87\, \text{miles} \times \frac{1\, \text{hour}} {4\, \text{miles}} \times \frac{60\, \text{min}} {1\, \text{hour} } \\ &=& \frac{0.87\times 60}{4}\, \text{min} \\ &=& 13.05\, \text{min} \\ \hline \end{array}$

What time will you arrive at school?

$7:10\,am + 13\, min = 7:23\,am$