When you have exercices like this tipe you write the base and add the exponents.the exponents are: 2; -4 and 5 so you put them in a sum:
2+ (-4) + 5=
=2 -4+5=
=7 -4=
=3
Suppose a radioactive substance has a half-life of 1000 years. What fraction will be left after 1000 years?
2 answers:
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When you have exercices like this tipe you write the base and add the exponents.the exponents are: 2; -4 and 5 so you put them in a sum:
2+ (-4) + 5=
=2 -4+5=
=7 -4=
=3
the third option
sorry if the answer is wrong
--Answer--
The answer is resolved in the photo.
The answer is resolved in the photo.
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