How do you find the citcumfrence of a circle

If there are 12 moths and some have 31 days and others have 30 days how many have 28 days?

Find the required measurements of the following trapezoids. a = 8 cm b = 16 cm h = 10 cm

Amuffin recipe, which yields 12 muffins, calls for cup of milk for every 1 cups of flour. the same recipe calls for cup of coconut for every cup of chopped apple. to yield a batch of 30 muffins, how much flour will be needed in the mix?