2.25h(60m/hr)(1/3)=45m
So Rick spends 45 minutes studying math per night.
Is there supposed to be a question or a picture with this ?
The formula for finding the area of a circle is A=pi(r^2). In this problem, you do 3.14 x 23^2.
3.14 x 23^2--->3.14 x 529--->1661.06 yards.
If you still don't understand and still need help, be free to ask me! Hope this helps!