Answer:
The answer is 560
Step-by-step explanation:
I just had this on a exam and answered 560 and it was correct.
Answer:
or 
Step-by-step explanation:
Formula for calculating area of a circle:

Formula for calculating area of a triangle:

Formula for calculating radius from diameter:

The left figure isn't a circle but a half circle, which (that the name indicates) is half a circle, and therefor also half the area of a circle. So the formula for calculating the area of a <u>half</u> circle is:

The right figure in the image is a triangle, so we can use the triangle-area-formula above for that:

The diameter of the half circle is 7 cm which means that the radius is 3.5cm.
6.125*pi is about 19.24225 cm^2
Now we just have to add the two areas together to get the total area.
The exact answer is:

The approximate answer is:

Hope i could help you understand!
If you have any questions, ask them in the comments below!
Have a good day (●'◡'●)
Answer:
2 4/5 feet
Step-by-step explanation:
let 'x' = height of fire hydrant
7/20 = x/8
cross-multiply:
20x = 56
x = 56/20 or 14/5, which is 2 4/5
Answer: i
Step-by-step explanation:
This is the imaginary number as this equation cannot be solved