2. The fruit company stores a batch of apples, and delivers them after selling 30% 160 boxes, which is more than the original apples110. How many boxes of apples are there?
3, a commodity, the original price is 20% less than the current price, the current price 1028 yuan, what is the original price?
The interest earned from the education savings is tax-free. Dad saved Xiao Xiao's education savings for three years, with an annual interest rate of 5.40%. Upon maturity, * * * received the principal and interest of 22,646 yuan. What is the principal of the education savings fund that Dad gave Xiao Xiaocun?
5. The clothing store bought two clothes at the same time, each of which earned 120 yuan, but one of them earned 20% and the other accompanied 20%. Did the two clothes sold by the clothing store make money or lose money?
6. The father is 43 years old and the daughter is 1 1 year old. A few years ago, my daughter was 20% older than my father.
7, a 200-page book, read 20%, and left () pages unread. 40% of the number A is equal to 50% of the number B. The number A is 120 and the number B is ().
8. A factory used 5400 tons of water in the second half of April, saving 20% compared with the first half. How many tons of water were used in the first half of the year?
9. Zhang Ping has 500 yuan money and plans to deposit it in the bank for two years. There are two deposit methods. One is to save it for two years, with an annual interest rate of 2.43%. One is to save it for one year with an annual interest rate of 2.25%. When the first year expires, take out the principal and after-tax interest and deposit it for another year. Which method can I choose to get more after-tax interest?
10. Xiaoli's mother deposited 5,000 yuan in the bank for a year, with an annual interest rate of 2.25%. When withdrawing money, the bank withheld and remitted 20% interest tax. How much interest tax was paid at maturity?
1 1. The flour yield of a wheat is 85%. Grinding 13.6 tons of flour requires _ _ _ _ tons of such wheat.
12, 20% of less than 2/5 tons is () tons, and 30% of () tons is 60 tons. Mode 1 and Mode 2
Monthly rental fee 30 yuan/month 0
The local call charge is 0.30 yuan/minute and 0.40 yuan/minute.
According to the above two mobile phone charging methods, consider the following questions:
(1) 200 and 350 minutes of local calls in one month. How much should I pay for the first option? In the second way?
(2) For a local call time, will there be the same amount of fees according to the two charging methods?
(3) If the average local talk time of Teacher A is 500 minutes per month, please help him decide an optimal way. (1) 200 points for local calls, mode I 30+0.30×200=90 (yuan), mode II 0.40×200=80 (yuan).
Local call, 350 points, 30+0.30×350= 135 (yuan) according to scheme 1; According to the second method, the cost is 0.4×350= 140 (yuan).
As can be seen from the above calculation results, when the call lasts for 200 minutes in the current month, it will be charged according to the second method to save costs, and when the call lasts for 300 minutes in the current month, it will be charged according to the first method to save costs.
(2) If the cumulative monthly call score is t, the charge according to the first method is (30+0.3t) yuan, and the charge according to the second method is 0.4t yuan. If the cost of the two charging methods is the same, then
30+0.3t=0.4t
t=300