Respuesta :
The rounded result is
4,000. If you just write "4,000", though, it's not clear whether there
are 1, 2, 3 or 4 significant figures, since trailing zeroes could be
significant (or not). For that reason, scientific notation is often
used. 4 × 10³ has one significant digit, 4.0 × 10³ has two, 4.00 × 10³
has three, and so on.
So, use either 4,000 or 4 × 10³, depending on what your teacher expects.
So, use either 4,000 or 4 × 10³, depending on what your teacher expects.
