6+4/5a=9/10a
make bottom numbers same
into 10
60/10+8/10a=9/10a
minus 8/10a from both sides
60/10=1/10a
multiply both sides by 10
60=a
Answer:
<h2>S.A. = 225 ft²</h2>
Step-by-step explanation:
We have
the rectangle 12ft × 6ft
two triangles with the base b = 12ft and the height h = 8ft
two triangles with the base b = 6ft and the height h = 9.5ft.
The formula of an area of a rectangle l × w:

Substitute:

The formula of an area of a triangle:

Substitute:


The Surface Area:

Substitute:

Answer:
Hello! I am not sure what your question is. Do you want the perimter? Area? soemthing else? Can you give more information?
Step-by-step explanation:
If the slice is made parallel to the base, then if the base is a rectangle, the cross-section would be A. rectangle