There are 300 pages in a story book. Xiaojun read 20% of the book on the first day, and the remaining 30% on the second day. (1) what page should I read on the third day There are 300 pages in a story book. Xiaojun read 20% of the book on the first day and the rest 30% the next day (1) What page should the third day start from? (2) On the third day, I read the remaining 25% of the first two days. How many pages did I read on the third day?

There are 300 pages in a story book. Xiaojun read 20% of the book on the first day, and the remaining 30% on the second day. (1) what page should I read on the third day There are 300 pages in a story book. Xiaojun read 20% of the book on the first day and the rest 30% the next day (1) What page should the third day start from? (2) On the third day, I read the remaining 25% of the first two days. How many pages did I read on the third day?

Hello!
The first day I read 300 x 20% = 60 pages
The next day I read (300-60) x 30% = 72 pages
The third day from 60 + 72 + 1 = 133
On the third day, I read (300-60-72) x 25% = 168 x 25% = 42 Pages
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In a 240 page story book, Xiao Jun read one sixth of the whole book on the first day, and the remaining one fifth on the second day. What page should he read on the third day?

Number of pages viewed on the first day 240 x 1 / 6 = 40
Number of pages viewed the next day (240-40) x 1 / 5 = 40
I read 80 pages two days ago
On the third day, the starting number of pages was 81

If one root of the equation x2 + X + a = 0 is greater than 1 and the other root is less than 1, the value range of real number a is obtained

Let f (x) = x2 + X + A, then from the known conditions: F (1) = 2 + a ﹤ 0, ﹤ a ﹤ 2

Which country has the largest population and land area in the world?

The country with the largest land area in the world is Russia
Unit (10000 square kilometers)
1 Russia 1707.5
2 Canada 997.1
3 China 960.1
4 US 936.4
5 Brazil 854.7
6 Australia 774.1
7 India 328.8
8 Argentina 278.0
9 Kazakhstan 271.7
10.6

What is Coulomb's theorem

Coulomb's Law: it is one of the basic laws of electromagnetic field theory. The force between two static point charges in vacuum is directly proportional to the product of the two charges and inversely proportional to the square of their distance. The direction of the force is along the line of the two point charges. The same charges repel each other and the different charges attract each other. Formula: F = k * (Q1 * Q2) / R ^ 2

January 28, 2012 is a Saturday. What day is September 28, 2012

September 28th of this year is Friday

A rectangular wood is 8 meters long, 12 meters wide and 5 meters high. It should be sawn into a cube with an edge length of 2 meters. At least several pieces can be sawed

First of all, the length, width and height must be a multiple of 2, so the sawing volume is 8x12x4 = 384
The volume of cube is 2x2x2 = 8
So number = 384 / 8 = 48

Decompose the following numbers into quality factors 51 54 91 111 112 143 187 1001
And 21600

51=3*17
54=3*3*3*2
91=7*13
111=3*37
112=2*2*2*2*7
119=7*17
143=11*13
187=11*17
1001=7*11*13
21600=2*2*2*2*2*3*3*3*5*5

Solve the following inequality
（1）3x²-2x+1

The first decomposition is (x + 1) (1-3x) < 0, so x + 1 < 0 or 1-3x 1 / 3, the second 3x & # 178; < 4x & # 178; < 4 / 3x takes the value of two-thirds of the positive and negative root sign, and the third shift between the three gets X & # 178; - 2x - 1 ≤ 0, the increasing and decreasing terms get X & # 178; - 2x + 1 - 2 ≤ 0 (x-1) & # 178; - 2 ≤

How many times is 46 + 48 + 50 + 52 + 54

46+48+50+52+54
=50×5
=250