The number is 20
20 squared is 400 which is a rational number
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.
876200432
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
400 is an integer and not a fraction. However, it can be expressed in rational form as 400/1. You can then calculate equivalent rational fractions if you multiply both, its numerator and denominator, by any non-zero integer.
5000 + 400 + 10 + 3 + 0.2
20000 + 5000 + 400 + 60 + 3
400 over 5000 is 2 over 25.
No because 400 is a rational number that can be expressed as a fraction in the form of 400/1
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.