5 X 10 = 50 , Hope this helps :)
do you have a photo of this problem? Otherwise we don't know what the points are.
For this case we have that the area of the triangle is given by:

Where:
b: It's the base
h: It's the height
We have to:

The atura will be given by:

So, the area is:

Answer:
144
The input to an exponential function is the initial value of the variable.
Surface area is 62 units ^2
5 x 2 = 10 since there are 2 of these side double it (20)
3 x 2 = 6 since there are 2 of these side double it (12)
3 x 5 = 15 since there are 2 of these side double it (30)
20 + 30 + 12 = 62