If `log_10 7=0.8451,` find the position of the first significant figure in `7^-20.`

If log_(10)7=0.8451 then the position of the first significant figure of 7^(-20) is

Find the significant figures in 0.06900

Find the significant figures in 0.002308

Find the significant figures in 0.000135

Find the number of significant figures in the 2.520 xx 10^7

Find the number of significant figures in the 2.520 xx 10^7

Express the fraction 7.566/0.00600 in the form of mxx 10^(3) . Also find the expression correct to three significant figures.

Solve with due regard to significant figure. 46.7 -10.04 =

Solve with due regard to significant figure. 46.7 -10.04 =