4 13/20 terminates. When you divide 13 by 20 you get 0.65 which terminates.
Of the four x-coordinates to choose only 1/√(11) belongs can belong to the unit circle.
The other three x-coordinates are greater than 1, then they are out of the unit circle.
The unit circle formula is x^2 +y^2 = 1
Then to find the y-coordinate given the x-coordinate you can solve for y from that formula:
y^2 = 1 - x^2
y = (+/-)√(1-x^2)
Substitute the value of x
y = (+/-)√{1 - [1/√(11)]^2} = (+/-) √{(1 - 1/11} =(+/-) √ {(11 -1)/11 =(+/-)√(10/11) ≈ +/- 0.95
Answer:
The value of P(A or B or C) is 0.382.
Step-by-step explanation:
Given,
P(A) = 0.169,
P(B) = 0.041,
P(C) = 0.172
Since, if events A, B and C are mutually events ( in which no element is common ),
Then, P(A∪B∪C) = P(A) + P(B) + P(C)
Or P(A or B or C) = P(A) + P(B) + P(C),
By substituting the values,
P(A or B or C) = 0.169 + 0.041 + 0.172 = 0.382
