Answer:
80% are 15 years old
Step-by-step explanation:
To find the percent , we need to know how many out of 100
20/25
Multiply the top and bottom by 4
20*4
-----------
25*4
80/100
This is 80%
80% are 15 years old
37,800 since it depreciates by 8% of the original price each year
I’m not sure what e is in your equation. But I think the answer is t=5000 months. Let me know if you need an explanation
X=13 1/3
So first you have to add 16 +4 = 20. Then, simplify 3/2 to 1.5. Finally divide 20 by 1.5 = 13.333333333, or 13 1/3
Let's make this simple. Let's have the small cone have a radius 1 and the height 1. This would make the bigger
cone
have a radius of 1 and the height of 2.
With this information, lets get the volume of both cones. The formula is this:

Plug in numbers:
Small cone:

Big cone:

The small cone has a volume of

The big cone has a volume of

Now, you want to find how many small cones you need to have the same total volume of the big cone.

You have the difference of pi over 3 comparing the big cone to the small one. You realize that the small cone has the same volume of that. Therefore,
you need 2 small cones to have the same total volume as the larger cone