Select the story problem that this division problem represents 1/2 ÷ 2/5

Suppose the radius of a circle is 16. what issuppose the radius of a circle is 16. what is its circumference its circumference

Maria donates a fixed amount, a, to a charity each month. if she donates $300 in 12 months, what is the equation for a? a. a + 300 = 12 b. a × 300 = 12 c. a × 12 = 300 d. a + 12 = 300 e. a + 32 = 100

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?