Answer:49.70
Step-by-step explanation:
<span>The <u>correct answer</u> is:
576 sq. cm.
Explanation:
The surface area of a figure is the sum of the areas of the faces of the figure.
The slant height goes from the apex of the pyramid along a face and is perpendicular to the base at the bottom of that face. This gives us 2 measurements of each triangular face of the pyramid: the height (the slant height of the pyramid is the height of the triangular face), 18 cm, and the base <span>of the triangular face, 12 cm.
The formula for the area of a triangle is A = 1/2bh; using our measurements we have:
A = 1/2(12)(18) = 108 sq. cm.
There are 4 triangular faces on a square pyramid, and each will have an area of 108 sq. cm.; this gives us:
4(108) = 432 sq. cm.
The area of the base is given by length times width, or 12*12 = 144 sq. cm.
This gives us a total surface area of 432+144=576 sq. cm.</span></span>
Answer:
Required solution is 
where A and B are constants.
Step-by-step explanation:
Given nonhomogenous differential equation is,
with 
To find another solution, consider 
be such that,
Hence,
where A and B are constants.
Let 
Hence,
where A and B are constants.
which is required solution.
Start with
Add 2 to both sides:
Divide both sides by 7:
Which is true if
If we choose the positive alternative, we have
Otherwise, we have
Answer:
The answer is 21.7
Step-by-step explanation:
21.8 - 0.1 = 21.7
