Answer:
134.62
Step-by-step explanation:
Given Sarah could rum 800m in 3 minutes and 20 seconds = 3*60+20 = 200 seconds when she was in year 8.
Where as she could run 800m in 2 minutes 44 seconds = 2*60+44=164 seconds.
Percentage improvement in her time = (difference in time/ original time) * 100
Hence there is an improvement of 18% in her time.
The radius is found from
... A = πr²
... r = √(A/π) = √(154/π) m ≈ 7.00 m
The circumference is then
... C = 2πr = 2π(7.00 m) ≈ 43.99 m
The circumference is about 44.0 m.
Answer:
Step-by-step explanation:
24