Answer:
5127079.21 cubic feet
Step-by-step explanation:
The silo is in the shape of a cylinder and a cone.
The volume of the silo will be the sum of the volumes of the cylinder and the cone.
Therefore, its volume is:

where r = radius of cylinder and cone
h = height of cylinder
H = height of cone
The radius of the base is 120 feet, the height of the roof (cone) is 25 feet. The height of the entire silo is 130 feet. This means that the height of the cylinder is:
130 - 25 = 105 feet
Therefore, the volume of the silo is:

The volume of the silo is 5127079.21 cubic feet.
3 decimal places. You start with the number with the two decimal places and then you add a decimal place because the number you're multiplying it by has one decimal place.
Answer: 
Step-by-step explanation:
The area of a parallelogram can be calculated with the following formula:

Where "b" is the length of any base of the parallelogram and "h" is the height.
In this case you can identify in the figure provided in the exercise, that:

Then, knowing those values, you can substitute them into the formula shown above, as below:

Finally, you must evaluate in order to find the area of the given parallelogram.
You get the following result:
