Let a and b be two finite sets such that n(a) = 20, n(b) = 28 and n(a ∪ b) = 36, find n(a ∩ b)

The frequency table shows a set of data collected by a doctor for adult patients who were diagnosed with a strain of influenza. patients with influenza age range number of sick patients 25 to 29 30 to 34 35 to 39 40 to 45 which dot plot could represent the same data as the frequency table? patients with flu

Atheater wants to build movable steps that they can use to go on and off the stage. they want the steps to have enough space inside so they can also be used to store props. how much space is inside the steps?

1. find the area of the unshaded square 2. find the area of the large square 3. what is the area of the frame represented by the shaded region show