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Sagot :
1. so 5000
so in the first quarter 5000 + (5000 times 0.075)=5375
second quarter 5375+(5375 times 0.075)=5.778.13
third quarter 5.778.125+(5778.125 times 0.075)=6211.48
and so on
when you get to 2.5 years you get 10305.2 which is more than double but round answer to whole year so
3 years you get 11908.9
2. a half life is how long it takes for half of the sample to decay so
a. not sure how to do this sorry.
b. so there are 2.5 1600s n 4000 so (22 times 1/2)=11 then 11 times 1/2=5.5 then since only half of the half life has passed then only 1/4 has passed away so
5.5-(5.5 times 1/4)=4.125
after 4000 years there will be 4.13 grams
so in the first quarter 5000 + (5000 times 0.075)=5375
second quarter 5375+(5375 times 0.075)=5.778.13
third quarter 5.778.125+(5778.125 times 0.075)=6211.48
and so on
when you get to 2.5 years you get 10305.2 which is more than double but round answer to whole year so
3 years you get 11908.9
2. a half life is how long it takes for half of the sample to decay so
a. not sure how to do this sorry.
b. so there are 2.5 1600s n 4000 so (22 times 1/2)=11 then 11 times 1/2=5.5 then since only half of the half life has passed then only 1/4 has passed away so
5.5-(5.5 times 1/4)=4.125
after 4000 years there will be 4.13 grams
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