In June, a residential district randomly checked the water consumption of the district for 6 days (unit: t), and the results were: 30, 34, 32, 37, 28 and 365, 438+0 respectively. Therefore, please estimate the total quarterly water consumption in June (30 days) as follows.

t.

Answer 960

In the past five years, the statistics of books owned by a school are as follows:

Statistical year

2008

2009

20 10

20 1 1

20 12

Number of books

14

600

15

080

16

930

18

665

2 1

760

According to statistics, there were _ _ _ _ books in this school in 2009. From 2008 to 20 12, the number of books in this school increased by _ _ _ _.

answer

15080

7 160