Answer:
Step-by-step explanation:
Circumference of the column
Circumference of a circle
Therefore:
Area of a Circle
Since radius of the cross section of the column =9 meters
Area of the cross section of the column
What's the least common multiple of 2 and 3
2 answers:
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To start, we're given the range that x lies in: from -1 to 4. We know from the fact that 
that -1 will be <em /><em>included</em> in that range, so we mark -1 on the number line with a solid circle. We also know from 
that, while x can be any value <em>up to</em> 4, it does not <em>include </em>4. We indicate this by drawing a hollow circle around 4 on the number line. Since x can be <em>any value within this range</em>, we make that fact clear by drawing a bold line between the points -1 and 4 on the number line. I've attached an image of what our final graph would look like.
