The number of significant digits of `8.65000xx10^(50)` is

If the number of significant digits of abc xx 10^-(10) is 1, then which of the following holds good?

The number of significant digits in 0.001001 is :-

The number of significant digits in 0.001001 is :-

The number of significant digits in 0.001001 is :-

What is the number of significant digits in 1.00xx10^6 ?

The correct answer upto proper number of significant digits : (2.50 x 10^(-2) km) + (3.7 xx 10^2 cm) is :

Calculate to the proper number of significant digits, 4.5xx10^(4)m+ 3.00xx10^(5)mm .