Evaluate –3ab when a = –2 and b = –5.
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This is what I would do.
The general formula for the circumference of a circle is
where r is the length of the radius of the circle. Simply use the formula to find r so that you can draw the circle:
Now, draw a circle with a radius of 1.571 inches. This number has been rounded up to 3 significant figure. Hope this helps!