Question

How many significant figures are present in 0.00035 ?​

Answer 1

Answer:

two significant digits

0.00035 has two significant digits: only the 3 and 5 tell us something; the other zeroes are placeholders, only providing information about relative size. 0.000350 has three significant digits: the last zero tells us that the measurement was made accurate to that last digit, which just happened to have a value of zero.