Decimal form. It is also known as base-10
There are many ways to write numbers, compare:-
Decimal uses 10 'symbols' (i.e. 0 to 9).
Binary (base-2) just uses zero and 1
Hexadecimal (also known as base-16) uses 16 symbols (i.e. 0 to 9 + A,B,C,D,E,F)
See Related Link below for more information.
The number is 20
20 squared is 400 which is a rational number
876200432
118 The following from rjsiekman; Think of it as the number of times the 3 will be written in the hundreds, tens, and ones column. This analysis assumes whole numbers; otherwise you can write a 3 an infinite number of times. In the hundreds, 301.....399 is 99 (because it is stated the numbers between 300 & 400; 300 is not included). In the tens, 3 will be written for 330....339 which adds another 10. In the ones, 3 will be written for 303, 313....393 which adds another 10. So, in total, the 3 will be written 119 times.
403 = (4 x 100) + (0 x 10) + (3 x 1)
expanded form
10000 + 5000 + 400 + 9
10000+5000+400+9
It is 300000 + 40000 + 400 + 20
5000 + 400 + 10 + 3 + 0.2
20000 + 5000 + 400 + 60 + 3
No because 400 is a rational number that can be expressed as a fraction in the form of 400/1
400 over 5000 is 2 over 25.
5 thousands = 5000. 10 tens = 100. 3 hundreds=300. 9 ones = 9. That's 5000 + 400 + 9, which is 5409
12.5
It would round to 5000.
200000000 + 90000000 + 4000000 + 300000 + 60000 + 5000 + 400 + 30 + 2