Given:
5 minutes 15 seconds
a.
[tex]5\text{ minutes 15seconds = (5}\times60)+15[/tex][tex]5\text{ minutes 15seconds = }315\text{ seconds}[/tex]b.
[tex]5\text{ minutes 15seconds = }5+\frac{15}{60}\text{ minutes}[/tex][tex]5\text{ minutes 15seconds = }5+0.25[/tex][tex]5\text{ minutes 15seconds = }5.25\text{ minutes}[/tex]