What is f(-3) for the function f(a)=-2a2-5a+4?
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Answer:
45.8
Step-by-step explanation:
We need to find the surface area for this entire figure!
We can see that this is a pyramid here - we must find the area of the 3 triangles and the base triangle at the bottom.
The 3 triangles building up the pyramid are all equal to each other.
To find the area of a triangle, use
Round to the nearest tenth: 45.75 -> 45.8