Respuesta :

Answer:

12.65 : 1

Step-by-step explanation:

Answer:

$12.65/h

Step-by-step explanation:

Unit rate is given by: [tex]U=\frac{cost}{time}[/tex]

So in this case we have [tex]U = \frac{\$253}{20h} =\$12.65/h[/tex]