Question

what is the significant figure in 3.75*10^-7

Answer 1

Answer: Three

Explanation:

Significant figure means how many digits of number are valuable to us when number is written in SI unit form.

Ex : 4.0001 have five significant figures 4,0,0,0,1

       4.1000 have two significant figures 4&1 the zeroes here are useless as          you know either you give $4.1000 or $4.1 to someone both will be same

Ex : 3.75 ×$10^{-7}$ have three significant figures 3,7,5

SI form means number represented in 10th power form

            789542 in SI form = 7.89542 × $10^{5}$ significant figures  = 6(7,8,9,5,4,2)

              000650.060 = 6.5006 × $10^{2}$ significant figures = 5(6,5,0,0,6)