equation for the grass ellipse is \( 36 x^{2}+72 y^{2}=3600 \) and the circle is \( x^{2}+(y+4)^{2}=9 \), in meters.
Answer \( \qquad \)
20. A landscape design calls for a stone walkway made of three semi annuli as shown in the figure below. One case of tones costs \( \$ 35 \) and covers 20 square feet. Find the most likely cost of the stones needed to tile the walkway when 10 feet and \( r=5 \) feet.
Answer \( \qquad \)
. Extra Credit: in the space below, make a composite relative to your major and show the area compos