In 2 minutes and 20 seconds the second hand of a clock passes through an angle that measures \( \square \) radians. (Simplify your answer. Type your answer in terms of \( \pi \). Use integers or fractions for any numbers in the expression.)

5. Em um polígono, a razão entre a soma das medidas dos ângulos internos e a soma das medidas dos ângulos externos é igual a \( \frac{7}{2} \). Quantos lados tem esse polígono?

The midpoint between two points is \( \{1,5\rangle \). One of those points is \( \{8,3\rangle \), find the other.

Draw a graph of the line that contains the given point and has the given slope. \( (0,1) ; m=-3 \)

7. A village with an actual area of \( 1 \mathrm{~km}^{2} \) is represented by an area of \( 4 \mathrm{~cm}^{2} \) on a map. (a) Express the scale of this map in the form \( 1: n \), where \( n \) is an integer.

Draw a graph of the line that contains the given point and has the given slope. \( (-5,0) ; m=\frac{1}{5} \)