It is 420,5040,840 and 1680 is divisible by 2,3,4,5 &6.
Answer:
12
Step-by-step explanation:
First figure the ratio of the real building to the model which is 21 divide 3. So the ratio is 1:7, since we're finding the height of the model, we divide 7 by 84 which is 12
Around 4.5π. This can be determined by the volume of a sphere formula.
