The temperature was 47 degrees Fahrenheit at 10 A. M. and 68 degrees Fahrenheit at 3 P. M. The temperature decreased by about 4 degrees Fahrenheit per hour after 3 P. M. About how much warmer was the temperature at 5 P. M. than it was at 10 A. M.?

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.