Question

3rd questions :/ HELP
A 46 gram sample of a substance that's a by-product of fireworks has a k-value of 0.1374.
Find the substance's half-line, in days.
Round to the nearest tenth.

Answer 1

ok we get the picture now? go straight to the answer. it is
\[-\ln(.5)\div0.1374\] use a caclulator

Answer 2

natural log of one half divided by the natural log of k, get rid of the minus sign

Answer 3

to the tenth it is 50.4 but you should check in case i give you the wrong answer

Answer 4

50.4 is incorrect