Choose words and fill in the blanks A pay attention B protect C obey D protect e keep () public order, () public security, () public property, () environment are the basic requirements of social morality

C.A.D.E

3、 Choose. (put the serial number of the correct answer in brackets)
1. The quotient of 5 / 45 is ()
A. One digit B. two digit C. three digit
2. 806 △ 21 is about ()
A.30 B.4 C.40
3. If you want the quotient of 25 / 25 to be two digits, you can fill in ()
A. A number larger than two B. a number smaller than three C. any number
4. Equal to the result of 28 △ 2, the formula is ()
A.280÷2 B.280÷20 C.2800÷20
5. February is ()
A. Big moon B. small moon
C. It's neither big moon nor small moon

1. The quotient of 5 mouth / 45 is (b) A. one digit B. two digit C. three digit 2, 806 / 21 is about (c) A.30 b.4 c.40 3. To make the quotient of mouth 25 / 25 be two digit, you can fill in (a) A. to 2

Please help to do two math problems
1. When a bookstore sells books, it launches a Book rental business. It rents one book for no more than three days. The rent is a yuan per day. If the rent exceeds three days, it will charge B yuan per day from the fourth day. If one book is rented and returned for seven days, how much is the rent?
2. The first figure has one heart, the second three, the third four, the fourth seven, and the nth how many?
Write as much as you think

Title:
1. When a bookstore sells books, it launches a Book rental business. It rents one book for no more than three days. The rent is a yuan per day. If the rent exceeds three days, it will charge B yuan per day from the fourth day. If one book is rented and returned for seven days, how much is the rent?
3a+[7-3]b=3a+4b
2. The first figure has one heart, the second three, the third four, the fourth seven, and the nth how many?
1、3、4、7.
From the third, each is the sum of the first two

Division of 6 powers of the same base (1)
*6. When bacteria propagate, one cell divides into two. After t times of division, the number of one cell becomes 2T
(1) There's a bacterium that splits every 15 minutes. If there are 100 of them on the plate now, how many of them are on the plate after 1 minute?
(2) How many times is the number of this kind of bacteria after 3 o'clock as that after 1 o'clock?

1 1 hour = 60 minutes 100 * 2 ^ (60 / 15) = 1600
2 3 hours = 180 minutes 100 * 2 ^ (180 / 15) / 1600 = 256

5 times 0.2 equals 1, so 5 and 0.2 are factors of 1, and 1 is a multiple of 5 and 0.2, because 6 divided by 2 equals 3, so 2 and 3 are factors, and 6 is a multiple, right?

A factor is an integer that can be decomposed into the product of two integers
5 times 0.2 equals 1, so 5 and 0.2 are the factors of 1, and 1 is the multiple of 5 and 0.2, right? This is wrong. If it is right, then 2 can be considered as the factor of 9, because 2 * 9 / 2 = 9, and 2 is the factor of 9. However, this is wrong
The definition of a factor is meaningful only in the range of integers

The first factor is not equal to 0. When the second factor is equal to, the product must be greater than the first factor?
A decimal B pure decimal C with decimal D less than one

If the first number is negative, when the second factor is a number greater than 1, their product must be greater than the first factor
If the first number is negative, there is no solution
It seems to be primary school content , no negative number
If you choose C, the integer part with decimal is a non-zero decimal, then it must be larger than 1

A question about division of the same base power
If a power of 10 is 20, B power of 10 is 1 / 5
Find the n power of 9 and the 2B power of 3

Your title is wrong. It should be a power of 9
Then the power a of 9 △ the power 2b of 3 = the power a of 9 △ the power B of 9 = the power A-B of 9
A power of 10 = 20, B power of 10 = 1 / 5
Division of two
Power a of 10 △ power B of 10 = power A-B of 10 = 100
Then A-B = 2
In other words, the A-B power of 9 is the square of 9, and the answer is 81

A simple problem about division of the same base power,
36^x/6^x=?
A.6 B.30 C.30^X D.6^X
Please explain why

36^x/6^=(36/6)^x=6^x
So the answer is d

Division of the same base power in Mathematics
1. Calculation
(x^n)^m-1/(x^n-1)^m+2

x^[n(m-1)-(n-1)(m+2)]=x^(m-3n+2)

1 [（x-2y)^3]^3÷[（2y-x)^2]^4=
2-（a^2b）^5÷（-a^2 b^3)=
3[（x-y)^2]^3÷[(y-x)^3]^2=
4(x^2y)6÷（x^2y)^3=

1 [（x-2y)^3]^3÷[（2y-x)^2]^4= （x-2y)^9÷（2y-x)^8=（x-2y)^9÷（x-2y)^8=x-2y2 -（a^2*b）^5÷（-a^2 b^3)=-a^10*b^5÷（-a^2 b^3)=a^(10-2)*b^(5-3)=a^2*b^23 [（x-y)^2]^3÷[(y-x)^3]^2=（x-y)^6÷(y-x)^6=...

Choose words and fill in the blanks A pay attention B protect C obey D protect e keep () public order, () public security, () public property, () environment are the basic requirements of social morality