\( \begin{array}{ll}\text { 11. } 152.25 \div 21 & \text { 15. } 585.14 \div 34\end{array} \)

Find the value of the expression. \( |-7|+|-8|-|-15| \)

Simplify. \( 6 \cdot\{(272-63 \div 7)-[(40 \div 8) \cdot(40 \div 8)-6 \cdot 2]\} \) \( 6 \cdot\{(272-63 \div 7)-[(40 \div 8) \cdot(40 \div 8)-6 \cdot 2]\}=\square \)

Four beneficiaries are to divide an estate of \( \$ 189,000 \) in the ratio \( \frac{1}{3}: \frac{1}{4}: \frac{3}{8}: \frac{1}{24} \). How much should each receive? The first beneficiary should receive \( \$ 63,000 \). (Simplify your answer.) The second beneficiary should receive \( \$ \) (Simplify your answer.)

El tamaño de un globlo rojo es de aproximadamente \( 7,5 \times 10 \) ?? mm. ¿Cuál de los siguientes números representa li forma decimal de la notación cientifica? A. 0,00000075 B. 0,00000075 C. 0,0000000075 D. 70000000,5

\begin{tabular}{l|l}\( \begin{array}{l}\text { Find the } \\ \text { value of the } \\ \text { expression. }\end{array} \) \\ \( |-10|-|-5| \)\end{tabular}