- Problem: A rectangular aquarium has a length of 30 cm , a width of 20 cm , and a height of 25 cm . To make it look nice, the aquarium needs to be painted on all its outside surfaces except the top. How much area needs to be painted?

What is the LCM of 15 and 20 ? \( \begin{array}{llll}415 & \text { B } 20 & \text { C } 60 & \text { D } 45\end{array} \)

4) Para cobrir o piso de um barracảo foram colocados 352 placas de 35 metros quadrados cada uma. Quantos metros quadrados tem o piso desse barracão?

Сколькими способами семья из четырёх человек может разместиться на пяти свободных местах в салоне автобуса? Ответ:

A ladder is leaning up against a house. If the ladder is 14 ft . long and it reaches 8 feet up the house, then what is the measure of the angle formed by the base of the ladder and the ground? (Hint - draw a sketch of the problem) The ladder and the ground forms an angle with a measure of "round values to the hundredths place**

\( ( \square - b ) ^ { 2 } = a ^ { 2 } - \square + b ^ { 2 } \)