Same archery target. Find the fraction of the total area that is shaded.<br><br>&bull; Total area = \( \pi \times 35^2 = \dfrac{22}{7} \times 1225 = 3850 \) cm&sup2;.<br>&bull; Shaded area (middle ring, r = 21 to r = 7) = \( \pi(21^2 - 7^2) = \dfrac{22}{7} \times (441 - 49) = \dfrac{22}{7} \times 392 = 1232 \) cm&sup2;.<br>&bull; Fraction shaded = \( \dfrac{1232}{3850} \).<br>&bull; Simplify: &divide;2 &rarr; \( \dfrac{616}{1925} \); &divide;7 &rarr; \( \dfrac{88}{275} \); &divide;11 &rarr; \( \dfrac{8}{25} \).<br><br>Final Answer: A = 8, B = 25