
One of the angle of the triangle is 90 degrees which means it is a right angled triangle. Two angles are same i.e 45 degrees which means the angle is an isosceles triangle.
so, x = 17 (isosceles triangle)
then use pythagoreas theorem:

and x = 17, so simplify and

so

Answer:
Mean would probably be the best answer
The square root of 75/3 is a irrational number
If the question is how much was evaporated it should be .5 liters
There's this many Packages and this many cans in each package right? All you have to do is multiply the number of cans and the number of packages to get the total number of cans.
For the cost is the same thing. If you know the cost is this much, multiply the amount of packages×The cost of each package which will give you the total cost. Good luck