On exponential function (25 14:30:58) It is reported that the water quantity of Qinghai Lake has decreased by 10% in the last 50 years. According to this law, let the water quantity of the lake in 2002 be m, and find the functional relationship between the water quantity y and X after X years from 2002

y=m*(0.9)^x

RELATED INFORMATIONS

1. Arithmetic sequence in senior one Given sequence {an} and {BN} satisfy bn=(a1+2*a2+3*a3+...+na4)/(1+2+3+...+n), If {an} is an arithmetic sequence, {BN} must be an arithmetic sequence, and vice versa Help, do right can add points
2. High one mathematics ~ arithmetic series solution, thank you! In the arithmetic sequence {an}, S10 = 120, then the value of A2 + A9 is? Brother on the first floor, can you be more detailed? I really don't understand!
3. In the sequence {an}, A1 = 2, a (n + 1) = an (n + 1) / N, find the general formula of {an}
4. The arithmetic sequence is in the arithmetic sequence 213206199192,. 94,87, in which the 10th item is the number
5. According to the formula, first find the number of terms, and then find the sum of arithmetic sequence. (1) 7 + 10 + 13 + 16. + 100 (2) 16 + 21 + 26 +. + 206 Everybody, you're smart! Be sure! There won't be any chance on Friday! Use the tail of the item!
6. Arithmetic sequence - 10, - 6, - 2,2 How many of the top items of the sum of 54?
7. The sum of the first several terms of the arithmetic sequence - 10, - 6, - 2,2. Is 54
8. The sum of the first several terms of the arithmetic sequence - 10, - 6, - 2,2 is 54? How does the process of finding the middle come from
9. Given 333111112: □ = 37:54 + 55 + 56 + 57 + 584 + 5 + 6 + 7 + 8, what is the number represented by the box?
10. 56 × 295 + 56 × 6-56 =? Urgent, simple operation!
11. Arithmetic sequence 2 (259:21:24) s100=10 s10=100 Then S110 = how much?
12. 86 degrees 23 minutes 12 seconds - 67 degrees 36 minutes 50 seconds = 49 degrees 28 minutes 52 seconds / 4=
13. 74 degrees, 23 seconds, 36 minutes, 6!
14. At 8:58 Beijing time on December 26, 2004, an earthquake with a magnitude of 8.7 occurred in Indonesia and triggered a powerful tsunami. The epicenter of the earthquake was located in Indonesia______ Plate and_______ At the junction of plates, the type of plate boundary is______ Border. Singapore is close to the epicenter, but not affected by the tsunami, because_____________ When it's still small, it spreads______ And arriving________ It can be predicted. The disaster is very serious, and the local early warning mechanism is not perfect___________ It has something to do with it
15. What's the difference between 55 inch TV and 58 inch TV?
16. At 12:58 on March 10, 2011, a 5.8 magnitude earthquake occurred in Yingjiang County, Yunnan Province, with 18000 people waiting to be resettled At 12:58 on March 10, 2011, a 5.8 magnitude earthquake occurred in Yingjiang County, Yunnan Province. 18000 people were waiting to be resettled, and people from all over the country donated money to the disaster area. An enterprise in a city immediately contacted the manufacturer to buy Tents and sent them to the disaster area. It is known that 500 tents can be purchased from the manufacturer for 90000 yuan. The factory produces three kinds of tents with different specifications, and the factory price is 150 yuan for each type a tent, Each tent is 210 yuan for type B tent and 250 yuan for type C tent ① If an enterprise purchases two kinds of tents of different specifications at the same time, what are the purchase plans of the enterprise? ② If an enterprise wants to buy three kinds of tents of different specifications at the same time, it must have each kind of tent. In order to facilitate the classification and packaging, the number of each kind of tent is required to be a multiple of 10. Please study whether it is feasible? If it is feasible, please give a qualified design scheme; if not, please explain the reason
17. From - 55 (on the basis of the previous number) + 1, - 2, + 3, - 4, + 5, - 6 Get a series of integers: - 54, - 56, - 53, - 57, - 52, - 58 From - 55 (on the basis of the previous number) + 1, - 2, + 3, - 4, + 5, - 6 Get a series of integers: - 54, - 56, - 53, - 57, - 52, - 58 How much larger is the 2013 integer than the 2012 integer? (there must be a calculation process)
18. How does 5 4 equal 29
19. How much is 29 + 10%?
20. How much is a 7.50% discount? Thank you