1000 mL has been infused in 8 hours at 150 ml/hr. After 3 hours, how many have been infused?

1000/8 = 125 ml

125 x 3
=375ml?

Therefore after 3 hours 375ml has been infused

Is this correct?

since the rate is 125ml/hr, why does it say 150 ml/hr?

Anyway, your calculations look good.

but watch the units.

1000ml/8hr = 125 ml/hr, not 125ml

125ml/hr * 3hr = 375ml

Thank you!

Almost correct! Let's break it down step by step.

First, you correctly calculated that the total volume is 1000 mL and the infusion rate is 150 mL/hr.

To find out how much has been infused after 3 hours, you calculated the rate (125 mL/hr) by dividing the total volume (1000 mL) by the total time (8 hours), which gave you 125 mL/hr.

Then, you multiplied the rate (125 mL/hr) by the time (3 hours) to find out how much has been infused, which gave you 375 mL.

So, after 3 hours, 375 mL has been infused. Great job!