Amanina is in the process of making ice cream. She has heated all the ingredients to 50 °C and put them in refrigerator to freeze. If the cooling rate is 11 °C per hour, what will be the temperature in freezer after 15 hours ?
In the figure below, ABCD is a square with sides 14. We draw the arc of a circle centered at C from D to B, and another arc of a circle centered at A from B to D as seen in the picture below. What is the area of the space between those two arcs?