20 is the lowest of the upper 3 numbers, so the missing number must be 19 when averaged with 20. That is, the missing number must be ...
2*19 -20 = 18
Answer:
The graph in the attached figure
Step-by-step explanation:
Let
x ----> the number of open acres
y ----> the number of developed acres
we know that
-----> inequality A
The solution of the inequality A is the shaded area above the solid line
-----> inequality B
The solution of the inequality B is the shaded area below the solid line
so
The graph in the attached figure
To find the volume of a pyramid you must multiple length x width x height, or in this case, just the base area x height. Then divide the number you get with 3.
124 x 24.2 = 3,000.8
you then divided this number by 3
3,000.8/3 = 1,000.2
The volume of the pipe is about 282.6 cubic feet.
First, we need to find the area of each circular cross section and subtract them to find the width of the pipe. The area of a circle is pi(r^2).
pi(3^2) - pi(2^2)
28.26 - 12.56 = 15.7
The width of the pipe is 15.7. Now, multiply that by 18 to find the volume.
15.7 x 18 = 282.6