Flávio tem uma moeda rara que vale \( R \$ 550 \). A cada década, o valor da moeda aumenta \( 10 \% \). Qual expressão nos dá o valor da moeda 6 décadas a partir de agora? Escolha 1 resposta: A \( 550 \cdot 0,1^{6} \) (B) \( 550+(1+0,1)^{6} \) (C) \( 550(1+0,1)^{6} \) (D) \( 550+0,1^{6} \)

8. The sum of the first \( n \) terms of a geometric progression is given by \( S_{n}=18\left[1-\left(\frac{1}{2}\right)^{n}\right] \) Find die conmun tatio of the proggession.

(4) Human skin has a thickness of about \( 5 \times 10^{-3} \) meter. A grain of sand has a thickness of about \( 1 \times 10^{-3} \) meter. (4) About how many grains of sand would it take to match the thickness of human skin?

6. \( \frac{125}{12} \) เขียนในรูปจำนวนคละ'ได้ตรงกับข้อใด ก. \( 10 \frac{10}{12} \) ข. \( 10 \frac{5}{12} \) ก. \( 5 \frac{10}{12} \) ง. \( 5 \frac{5}{12} \)

\( A = \left[ \begin{array} { l l l } { 1 } & { 3 } & { 2 } \end{array} \right] , \quad B = \left[ \begin{array} { l } { 2 } \\ { 0 } \\ { 3 } \end{array} \right] \)

4) Five pounds of fruit and 3 pounds of nuts cost \( \$ 78.66 \). Three pounds of fru and 5 pounds of nuts cost \( \$ 56.86 \). Mrs. Silvers paid \( \$ \) for 2 pound of fruit and 2 pounds of nuts.