I NEED HELP
What is this answer

21.5 square units

Step-by-step explanation:

To find the area of the green, you need to subtract the circles' areas from the total area.

The total space is that of a square with side length 10. So, we know that the total area is 10 * 10 = 100 square units.

Now, to find the area of the circles, we need to find the radius (because the area of a circle is ). We know that the diameter of a circle is 2 * radius = 2r. We can also see across two circles, tangent to each other and to the sides of the squares, is the length 10. This means that the two circles' diameters add to 10: 2d = 10, which means that we can substitute d with 2r: 2(2r) = 10, so we know that r = 10/4 = 5/2 units.

Now, we can find the area of the circles:

This is the area of one circle. However, we have 4, so we multiply this by 4:

Now, we subtract 25pi from 100:

square units (I rounded to the nearest tenth)

Thus, the answer is 21.5 square units.

Hope this helps!

21.5

Step-by-step explanation:

Square - 4 circles

Radius of each circle: 10/4 = 2.5

10² - 4(3.14 × 2.5²)

21.5 units²

a) one student is chosen from classroom a, then a student is chosen from classroom b.  

step-by-step explanation:

independent events are ones in which the probability of one event does not affect the probability of the second event.

one student is chosen from classroom a; this does not affect the chances of choosing a student from classroom b.   this makes these independent events.

when one card is chosen from a standard deck and then set aside before a second card is chosen, the probability of the second card being chosen changes.   this makes them dependent events.

when one student is chosen from classroom a and then a second student is chosen from classroom a, the probability of choosing the second student changes.   this makes them dependent events.

when a letter is chosen from the alphabet and then a second letter is chosen, the probability of choosing the second letter changes.   this makes them dependent events.