It is 9 because you have a 30,60,90 triangle, and then you can use pythagorean theorem.
The ratio 12:20 because you need it to be equal to 3:5. 3 times 4 which makes 12 so you need to multiply 5 with 4 too
Answer:

Step-by-step explanation:
The two-way frequency table is attached below.
We have to calculate the probability of, a person chosen at random prefers pizza given that they are female, i.e 
This is a conditional probability.
We know that,

So,

From the table,


Putting the values,

Answer:
I don't know that options but......
if we are rounding to the thousands, then the answer would be 3,000
if hundreds, the answer is 3,400
if tens: 3,390
If ones: 3,390
Step-by-step explanation:
round each number up or down based upon what the digit is.