40.96 is what I got. Hope this helps. :)
115.62 times 3 equals 346.86
then both flights together would be 45.70 plus 32.49 equals 78.19
15 dollars a day for food times 4 equals 60
if he won 75 and lost 25 that would be like only winning 50
then you add them all up and subtract 50
346.86 + 78.19 + 60 - 50 equals 435.05
so he ended up paying 435.05
Equation DONT USE THE LINK
Volume of an iceberg = 7685 cubic feet
Since, density of ice = 0.917 
We have to determine the mass of the ice.
Since density = 
Since the unit of density is in
, first we will convert the density unit in kilogram.
Since, 1 kilogram = 1000 gram
Therefore, density = 
= 0.000917 
Since, the density unit is in cubic centimeter. We will convert it into cubic feet.
1 cubic centimeter = 0.00003531466 cubic feet
Therefore, 0.000917
= 0.000917 x 0.00003531466
= 0.0000000323
.
Now, mass = 
= 0.0000000323
7685
= 0.000248
=0.00025
.
Therefore, the mass of ice is 0.00025
.