Let's say the number is hmmm "a", its reciprocal would then be 1/a
thus

solve for "a"
Answer:
60
Step-by-step explanation:
ratio: 12/6 =1/2 x/30=1/2 x=60
Answer:
38.5 m²
Step-by-step explanation:
when
is the base length of the triangle and
is its height
Plug in the base length, 11 m and the height, 7 m

Therefore, the area of the figure is 38.5 m².
I hope this helps!
Answer: 
Step-by-step explanation:
You need to remember the following:
1. The area of a rectangle can be calculated with the following formula:

Where "l" is the length and "w" is the width.
2. The area of a triangle can be calculated with the following formula:

Where "b" is the base and "h" is the height.
Use those formulas to find the area of each face.
<u> Area of the rectangle</u>

<u>Area of two triangles</u>
There are two equal triangles. Each one has a base of 10 inches and a height of 5 inches. Then, their areas are equal:

The areas of the other two triangles (which are equal) are:

Adding the areas of the faces, you get that the surface area of the rectangular pyramid is:
