Med Math Problem

3 hours ago, Johaanas said:

So, hourly rate would be 80 ml/hr, correct?

Therefore, total daily need would be 80ml/hr x 24 hr/day = 1920ml/day.

Correct.

3 hours ago, Johaanas said:

- 4 ml/kg/hr for the first 10 kg

- 2 ml/kg/hr for 10-20 kg

- 1 ml/kg/hr for every kg over 20 kg

If this is how all of you are writing it out, though, I can see why there is confusion especially at the second step: Someone may read that and think, "well there are another 20kg to account for (if the child's weight is 40kg), so step 2 would be 2*20 = 40. That misunderstanding gets you a total of 100ml/hr. Probably better to think of it as "4 for each kg of the first 10kg + 2 for each kg of the second 10kg..." and understand that the max you can add at step 2 will always be 20.

Not sure if that's where your classmates are going wrong, but it's possible.

Personally I think this is simpler overall.

Thank you so much for your help!!

We were all getting really different answers .. for some reason a couple of my classmates were getting 80 ml/day so then they were dividing it by 24 hours giving them a really small number. I think it was a simple mistake of units. Thank you so much for clarifying.

On 8/18/2019 at 11:33 PM, Johaanas said:

Thank you so much for your help!!

We were all getting really different answers .. for some reason a couple of my classmates were getting 80 ml/day so then they were dividing it by 24 hours giving them a really small number. I think it was a simple mistake of units. Thank you so much for clarifying.

For those classmates getting 80 ml/day, to help them reason it out tell them that's less than 3 ounces. A 40kg kid is what 8, 10 years old? Does that sound right?