exam Maths Puzzle Numerical Ability

If the area of a circle is 49pi, what is the circumference. I got 22cm

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exam Other Question

Find the a(sub2) in the arithmetic sequence where a(sub5) = 42 and
a(sub10) = 62. What would the coordinates be when solving this system of linear inequalities by graphing?
x - 3y > 6
3x + 2y > 12