Having trouble getting a formula to work

Gijs90  wrote:

``0.612*15*1.25*(2*2.5)*sqrt2.5*(1-(1.2/1.25))1/2*72.5=1315.41KJ``

=0.612*15*1.25*(2*2.5)*SQRT(2.5)*(1 - 1.2/1.25)^(1/2)*72.5

results in 1315.40868545317, which rounds to 1315.41.

But note that x^(1/2) is just another way to write SQRT(x).  So another way to write the formula is:

=0.612*15*1.25*(2*2.5)*SQRT(2.5)*SQRT(1 - 1.2/1.25)*72.5

But that could be just GIGO.

Please attach a jpg of the math formula as it appears in your course source so that we can vet your Excel interpretation, in the first place.

And please provide a link to a webpage that has the same math formula with an explanation of it terms.

I tried find it with a google search for "calculate the amount of energy we lose thru an open door" without quotes, to no avail.