The area is 113.1m If you want to double check go on google and look up surface area of a sphere. A calculator will come up. Hope this helped.
We know that the sum of the internal angles in each triangle is 180°.
Therefore we have the equation:

substitute and solve:

We have

substitute the value of x to the expression:

Answer: m∠N = 42 degrees
1- square root is not a whole number
Answer:
b
Step-by-step explanation:
The volume of the first floor is 9000 inches cubed.
20*45*10=9000
The volume of the attic is 360 inches cubed.
8*45=360
You don't have to divide by two as there are two triangular prisms.