Answer:
2
Step-by-step explanation:
lets think of the missing number as x so any number times 10 should equal 20 so x=2
and your equation should look like this--------> 20÷2=10
Answer To Number 3:
No. This is not a function.
Step-by-step explanation:
This is not a function, because you cannot have 2 inputs(x) that are the same number, but you can have 2+outputs(y) that are the same number.
Answer:
The volume of water in the vase is 
Step-by-step explanation:
A cylinder vase has a height, h, of 10 inches and its diameter of 3 inches. This means that its radius, r, is:
r = 3 / 2 = 1.5 inches
To find the volume of the water in the vase if the water raises to 9/10 of the way to the top, we first have to find the volume of the vase when it is filled with water and then, find 9/10 of that volume.
The volume of a cylinder is given as:

The volume of the vase will be:

Hence, the volume of the water in the vase when it is 9/10 filled is:

Approximating to the nearest cubic inch, the volume of water in the vase is 