exam Maths Puzzle Numerical Ability

The circumference of a circle is 20Pi. What is the area of the circle? Leave your answer in terms of Pi

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exam Other Question

sqrt(3)/2 sqrt(2) + sqrt5 / 3 sqrt(2)

need to simplify this.
Graph the line with the given point and slope.

Draw I¡ through(0,-3) and (3,0). What is the slop of any line perpendicular to I¡? Draw I2 through the origin so that it is perpen