The radius of a circular plate is increased by 8%. What will be the approximate percentage increase in its area?

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1. Area of a circle is $A=\pi r^2$. 
2. If radius grows by 8%, new radius = $1.08r$. 
3. New area = $\pi(1.08r)^2=\pi r^2(1.08)^2$. 
4. Percent increase = $(1.08^2-1)	imes100\%= (1.1664-1)	imes100\%=\mathbf{16.64\%}$. 
FINAL_ANSWER: c

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