The area of a circle can be calculated using the formula: \( A=\pi r^{2} . A= \) area and \( r= \) radius. Calculate the area of a circular manhole cover that has a radius of 30 centimeters. Round your answer to two decimal places. What unit of measurement will the area of this manhole cover be measured in? square feet feet o square centimeters o cubic feet o cubic centimeters O centimeters

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

Graph the line containing the point \( P \) and having slope \( m \). \( P=(-6,3) ; m=0 \)

coordinate grid below. Find the coordinates of a fourth point o that the four points form the vertice of a rectangle.

\( (-9,-1) \) and \( (12,14) \) Slope \( = \)

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.