Answer:
5
Step-by-step explanation:
To find the area of a circle, you have to use the area formula:
r being your radius
A = 
Substitute 1 in for r
A = 
A = 
In probability, you study the chances of an event to happen based on statistics gathered. Probability is always expressed as a part of a whole, thereby in fractions or percentages. From the statistics gathered, it said that 80% of the time, the plane arrives right on schedule in El Centro. That means that the probability of NOT arriving on time is the other portion, which is 20%. Thus, the answer is 20%.
The answer would be 3 times 10^-5