Answer:3.264 rounded to hundreths is 3.26
Step-by-step explanation:
We have:
4 triangles with the base b = 5ft and the height h = 6ft
4 rectangles with the lenght l = 5ft and the width w = 4ft
1 square with side a = 5ft.
The formula of an area of a riangle:

Substitute:

The formula of an area of a rectangle:

Substitute:

The formula of an area of a square:

Substitute:

The Surface Area of composite solid:

Substitute:

<h3>Answer: The Surface Area of the composite solid is 165 ft².</h3>
Is C and D because 10x^2-6x^2=36+64
4x^2=100
x^2=25
x= -5 or 5
O.2 0.2 0.2 the answer is 0.2
yeah