120000 scientific notation

The fifth power of 1.2 × 10

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1. 7.35 million tons in scientific notation
2. 0.0000002 is expressed by scientific notation
3. 0.000000154 is expressed by scientific notation___________ .
4. 0.000043 is expressed as 0.000043 by scientific notation______ ．
5. There is a rectangle with a circumference of 32.6 decimeters and a length of 8. What's its area?
6. It takes 65 seconds for a train to cross the 990 meter bridge, and it takes 10 seconds for the train to pass by a wire at the same speed
7. The perimeter of the rectangle is 38 cm, the known blank width is 5 cm, and the shadow part is a square 1. The shadow is a square. 2. The width of a rectangle is five centimeters
8. The taxi charging standard of a city is: the starting price is 12.5 yuan, 1.5 yuan per kilometer from 3000 meters to 5000 meters, and 2.5 yuan per kilometer after 5 kilometers If someone takes x (x ＞ 5) kilometers, write down the cost he should pay with algebraic formula 2. If he pays 53 yuan, calculate the distance he takes Please hurry up. It's urgent
9. Draw the rectangle nailed with wooden strips into parallelogram and compare their perimeter and area 1. Perimeter and area change. 2. Area change, perimeter unchanged. 3. Perimeter change, area unchanged In rectangle, square and circle with equal perimeter, () has the largest area?
10. Speed up the math problem 1. The selling price of a certain type of mobile phone in June is 2000 yuan. After two successive price cuts, the current selling price is 1280 yuan. If the percentage of each price cut is the same, calculate the percentage 2. It is known that the equation (a + 2) x & # 178; - (2a-1) x + a = 0 has two unequal real roots, and the value range of a is obtained 3. It is known that the univariate quadratic equation x & # 178; + 2mx + (M + 2) * (m-1) = 0 (M is a constant) (1) If the equation has two unequal real roots, find the value range of M; (2) If the equation has two equal real roots, find the value of M; (3) If the equation has no real root, find the value range of M It's better to have a process and some bonus points
11. 2.89 million in scientific notation
12. 5 out of 6 hours = (?) seconds
13. How many 10 seconds are there in six hours?
14. 3 hours 18 minutes 36 seconds = () hours
15. How to express 50340.6 in scientific notation
16. How to express 3600.6 in scientific notation
17. 158.345 billion expressed in scientific notation (3-digit approximation reserved)
18. 2.83 billion in scientific notation
19. 3123000 scientific notation
20. The following numbers are expressed by scientific notation: 0.000 000 09 cm, 0.000 000 2 cm The weight of one pill is about 0.156 G