Question 571608
{{{ log( 1.8*10^(-7) ) }}}
Use the rule:
{{{ log( a*b ) = log(a) + log(b) }}}
--------------------------
{{{ log( 1.8 ) + log( 10^(-7) ) }}}
Use the rule:
{{{ log( a^b ) = b*log(a) }}}
---------------------
{{{ log( 1.8 ) + (-7)*log(10) }}}
{{{ .25527 - 7*1 }}}
{{{ -6.7447 }}}
check answer:
On my Casio calculator,
{{{ 10^(-6.7447) = 1.800114*10^(-7) }}}
I assume error is due to rounding off