it was in some practice paper we were given.What chapter is that problem in? I need it so I can find it easier.
it should be 47.8it is definatly logarithms.
edit-
you will first get: log[base 10](2000/255)=.018t
then: 0.89448=.018t
then finally: t=49.69387
(gotta love windows calculator...)
how did you manage that. its pretty obvious it cant be 200 as that would give a pretty big number, well bigger than 200 anywayIt's always possible that it is a typo. I"m sorry to say that i got that one marked wrong...
lol i had 200 sumthing