9. According to a newspaper report, "A 63 -year-old man has rowed around the world without leaving his living room." He clocked up 25048 miles on a rowing machine that he received for his 50th birthday.
Roughly how many miles per year has he rowed since he was given the machine?
A 200
B 500
C 1000
D 2000
E 4000
9. D The man has rowed the equivalent of just over 25000 miles in approximately 13 years. So the mean number of 'miles' rowed per year is approximately $\frac{25000}{13} \approx \frac{26000}{13}=2000$.