Anumber divided by 58 is close to 30.
which of the following could be this number?

a 18.43
b 184.3
c 1843
d 18 430

X/58 (is roughly) 30
x/58 = 30
Multiply 58 on both sides.
x = 1,740

So it has to be c. 1,843

Without calculating, we can approximate that (roughly) 30 x 58 is going to be a four-place value number because
30 < two place values
x 58 < two place values

Four place values, or C) 1,843