A penguin sitting on an iceberg notices a fish swimming below. The fish is 15.6 ft below sea level. The penguin dives and reaches the fish in \( \frac{5}{8} \) of a minute. What wa the rate of descent the penguin made?

6. Six classes, each with 38 pupils, went on an excursion. If one teacher way required to supervise 15 pupils, how many teachers were needed on the excursion?

На автомашине планировали перевезти сначала \( 3 \frac{8}{9} \) т груза, а г том ещё \( 2 \frac{11}{18} \) т. Однако перевезли на \( 1 \frac{1}{4} \) т меньше, чем предпол гали. Сколько всего тонн груза перевезли на автомашине?

9) \( \frac{(-3)^{6} \cdot 27^{3}}{81^{2} \cdot 243}= \)

1. \( 12 \frac{3}{2} \) of a sum of moncy is \( \$ 60 \). What is the sum of money? \( \begin{array}{llll}\text { (A) } \$ 7.50 & \text { (B) } \$ 20.83 & \text { (C) } \$ 72.50 & \text { (if) } 5480.00\end{array} \) ; 2. There are 40 students in a class. Boys make up \( 40 \% \) of the class. If \( 25 \% \) of the boys wear shirts jacs, how many boys wear shirt jacs? \( \begin{array}{llll}\text { (2) } 4 & \text { (B) } 10 & \text { (C) } 16 & \text { (D) } 30\end{array} \)

166. En una actividad de integración participan 96 nifias y 112 niños. Hay que formar grupos con igual cantidad de integrantes, de tal forma que cada grupo renga la misma cantidad de nifios y la misma cantidad de nifas, Cuíl es la mayor cantidad de grupos que se puede formar y como estanán conformados?