Answer:
rounded to- 7.07
Step-by-step explanation:
The formula for area of a circle is 
do you need to find the radius by divided the diameter by two, you get 1.5
You then plug in 1.5 into the formula and solve
Answer: The winning time increased by an average of 0.4 second per year from year 2 to year 4.
Ur answer is 2 because 2 goes into both 6 and 8