Respuesta :

$45 divided by 7.5 is $6. Multiplied by 30 gets you your answer $180

if my pay is 45 USD for 7.5 hours of work  

than for 30 hours = 30/7.5 = we get 4 time pay

we multiply this 4 time with 45 USD

we get 4 X 45 = 180 USD