4月14日JJ

AWA 1. governments should not be responsible for regulating the business and other organizations. Business should have its own standards and regulations. 2. the profits of the local clothing department decease during a period of Aug 1 and Oct. But the profits of the household department increase in the same period. Therefore we should reduce the size of the clothing department and increase the household products. Math 1. a picture with a boarder. The area of the boarder is 196. the boarder are all 2 than the picture. and the length of the picture is twice the width. Ask the length of the picture. Answer: 30 2. 3^6k=8100 ask (3^(k-1))^3=? Answer: 10/3 3. what’s the remainder of 2^k divided by 10. (1) k is dividable by 10 (2) (2) k is dividable by 4 answer: D 4. ask the unit digit of p^xy (1) the unit digit of p^x is 1 (2) the unit digit of p^y is 1 Answer: D 5. an(subscript)=a1*k ask k=? (1) a1=1 (2) a5=16 Answer: C 6. ask if 0.n68<1/n (1) n<5 (2) o.n68<1/n^2 Answer: C 7. x does a 1/3 of a thing using 4 hours. x, y do the rest of this thing simultaneously using 6 hours. ask how many hours y will use if y does it alone. 8. A must choose 2 of 4 types of floor, and choose 2 of 6 paint of colors. Ask how many combination of types of floor and different paint colors. 90 9. toss two dices. Six sides from 1 to 6. ask the possibility of the sum of two dices either 5 or 9. 2/9 10. total units of A and B is 1000. the price of A is 1500, and the price of B is 16000. Ask the units of A (1) total revenue of A and B is 200000 (2) the units of A is twice those of B 11. fuel of the first 2 mile is 15 dollars. And the rest cost at a fixed price. Ask the cost of 14 miles. (1) 3.5 miles cost 20 dollars (2) x (specific number) miles cost 40 dollars. Answer: B 12. H average is the reciprocals of the sum of the arithmetic average of reciprocals 2. 4 . 6. 12. Ask the H average. 13. in a 405 miles road. A 36 miles per gallon. B is 25% less than A. Ask how much more gallon B than A . 14. numbers between 100 and 500. ask the number. (1) the product of the digits is 30 (2) the tenth digit is larger than the unit 15. several right-angled triangles. Easy 16. triangle MNP in a coordinate pane. Ask N. (1) M is (-4. 0) (2) MNP is a equivalent triangle 17. in a number line. Situation A, B, N. A is –1/4. B is 1/2. AN is five times of BN. Ask N 18. A is 80% of 80% of x( specific number). Ask A. 19. which of the following is not the factor of the least common multiplier of x, y, z (specific number). The multiplier is 2^2*5^2*7^2*3^2 20. ask the number of the prime factors of 14300 21. x(x+1)(x+2)=0 ask the value of x (1) x^2+x=0 (2) x^2+2x=0 22. Y=km+b ask the slope of K (1) line y=(1-m)b+a parallel Y (2) Y intersect with line y=2x+3 at point (2.7) 23. Class Number Mean Median A a 82 85 B b 79 75 Ask if the median of a+b more than the mean of a+b (1) the sum of a+b is 79 (2) a=42, b=37 24. n employees have different salaries. Ask the median. (1) The median is 15th in the increasing list order of the salaries. (2) Total salaries of n employees is xxx(specific number) 25. d dollars 20% of a thing. d/2 80% of a thing. ask the ratio of d to the total. 26. X travels at a constant rate. traveling 1 kilometers at this rate costs 2 seconds longer than 75 kilometers per hour. Ask this constant rate. 27. h(x)=x/k.ask if h(4)>20 (1) h(10)>20 (2) h(1)>2 28. the radius of a circle is 3. a cord XA is 3. Ask the ratio of arc XA to the circumstance. 29. k percent of a thing. m percent of the same thing. k>m. ask how much percent k than m. RC 1. First, R presents a hypothesis that the age is more important than gender in pre-colonism African. Second, a specific example of Kenya compared with G country. Third, the R modifies the hypothesis. 2. about the maternity leave. 3. the development theory of east Asian. One is the self-adjusting. Another is about the government theory.