oliviacalhoun29
23.11.2020 •
Mathematics
If 8 g of a radioactive substance are present initially and 2 yr later only 4 g remain, how much of the substance will be present after 5 yrs?
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Ответ:
none
Step-by-step explanation:
8-4=4
if every 2 years, 4 gallons disappear
then every 1 year, 2 gallons disappear
meaning that by 5 years there will be no substance left.
(5*2=10)
Ответ:
78.5
Step-by-step explanation: