I am confused what is your question then i will tell you the answer.
Green or purple = 10
prob(green or purple) = 10/30 = 1/3
<h2>
Greetings!</h2>
Answer:

Step-by-step explanation:
You need to remember the following equation:

Where a and b is the lengths of the two sides and c is the hypotenuse.
So simply plug these values into this:

36 + 49 = h^2
36 + 49 = 85
So the hypotenuse is the square root of 85:

<h2>Hope this helps!</h2>
Answer:
A sample of 997 is needed.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of
, and a confidence level of
, we have the following confidence interval of proportions.
In which
z is the z-score that has a p-value of
.
The margin of error is of:

A previous study indicates that the proportion of left-handed golfers is 8%.
This means that 
98% confidence level
So
, z is the value of Z that has a p-value of
, so
.
How large a sample is needed in order to be 98% confident that the sample proportion will not differ from the true proportion by more than 2%?
This is n for which M = 0.02. So






Rounding up:
A sample of 997 is needed.
Answer:
C
Step-by-step explanation:
Calculate the distance (d) using the distance formula
d = √ (x₂ - x₁ )² + (y₂ - y₁ )²
with (x₁, y₁ ) = (- 3, 9) and (x₂, y₂ ) = (3, 1)
d = 
= 
= 
= 10 → C