According to the meaning of the question, from 200 1 to 20 10, the city's annual investment in the "school-to-school connection" project increased by 500 thousand yuan over the previous year. Therefore, a arithmetic progression can be established, representing the annual investment from 200 1, where,
Then, by 20 10, the total investment will be
(ten thousand yuan).
A: From 200 1 to 20 10, the total investment of the "school-to-school communication" project in the city is 72.5 million yuan.