Answer:
i honestly dont know this but im guessing its about 12th grade work.
Volume of a sphere = 4/3pi*r^3
diameter/2 = radius
Radius = 12/2 =6
Volume of sphere = 4/3pi*6^3 = 288pi
It is the first choice. All you have to do is isolate A from 2A so you would divide by 2 and get A=bh/2
Answer:
1. 1800 square cm.
2. See below
3. 45000 square cm.
Explanation:
Part 1
The dimensions of the drawing are 36cm by 50cm.

Part 2
Given a scale factor, k
If the area of the scale drawing is A; then we can find the area of the actual board by multiplying the area of the scale drawing by the square of k.
Part 3

Therefore, the area of the actual drawing will be: