hi what is 43342 to 1sf because my old maths teacher said if you put zeros after the first number then they count as sf too, but on bbc bitesize it says the answer is 40000??

that is true because 43342 to 1sf is 4e4 which is 40000 the one sig fig is stating that 4 is the only number that you can say for certain

ok thankyou =)