HEL! The average low temperature by month in Nashville is represented by the function, f(x)= -1.4x^2 + 19x + 1.7, where x is the month. Find the average rate of change from March to August. (m= f(b) - f(a)/b - a)

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.