Answer:
78.54 ft^2
Step-by-step explanation:
The area of a circle is pi*r^2
R is the radius, which is half the diameter, so 5.
5^2 is 25, and that times pi is about 78. 54. Because this is feet and area is squared, our unit is ft^2
Hope this helps!
If there are 30 students then each student would probably get called up 6 times. I did this by dividing 180 by 30 that got me so each student will go up at least 6 times if there are 30 students
The probability of the union of two events is the sum of their probability, minus the probability of their interserction:

If we plug the known values into this formula, we have

From which we can deduce

So, the probability of
is a bit less than
, we have to take away all events that belong to B as well:
