Answer:
7
Step-by-step explanation:
We need to first of all find the volume of the fish tank. The most probable shape the ship tank can have is that of a cuboid.
The volume of a cuboid is l * b * h
And this is equals 30cm * 70cm * 90cm = 189,000 cubic centimeters
The number of fish the tank can contain can be obtained by dividing the volume by the volume occupied by a single fish.
This is 189,000/27000 = 7
We have the equation:

so:

and:

This equation has one solution.
Answer:
D
Step-by-step explanation:
11 per 1,000
28 7/8, write 875/1000 and keep dividing by 5 to get the simplest form
So the formula would be -1856 +98[n-1]