Use a=
r^2 (r represents your radius of 4 feet)
(4^2)
Answer = 16
^2
If you multiply 8.5 by 50 cents your answer will be 4.25
Joey has 21 socks all in all. Out of them, there are 10 dress socks and 13 brown socks. There are 7 brown dress socks. The probability,
P (brown or dress) = P (brown) + P (dress) - P (brown and dress)
Substituting,
P(brown or dress) = 13/21 + 10/21 - 7/21 = 16/21
Thus, the answer is 16/21.
