Claire has 8 cards: 4 red cards and 4 blue cards. She draws 3 cards from the set at random. What is the probability that all 3 cards are red?

1/14 assuming cards are nut returned back in deck

Step-by-step explanation: first is red P(1. R) = 4/8 = 1/2

Second red P(2. R) = 3/7 and P(3. R) = 2/6 = 1/3.

Multiply probabilities , you get 1/14

Maybe you meant that the circle is incribed in the square, then,

area of square = 144 m^2
=> side^2 = 144 m^2
=> side = sqrt (144 m^2)
=> side = 12 m

since the circle is incribed in the square
diameter of circle = length of a side of square
= 12m

now,
circumference of circle = 2 × pi × r
= 2 × 3.14 × 6 m
= 6.28 × 6 m
= 37.68 m
= 37.7 m