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A radioactive Isotope decays at a rate proportional to the amount present. If the Isotope has
a decay rate of 12.10% per thounsands of years and the current amount of the isotope is
135.2 mg. How much of the isotope will remain after 2.2 thounsand years? Round your
answer to the nearest tenth.

a- 101.8
b- 99.8
c- 90.3
d- 129.7

Which of the following statements is true? a. the irrational number system is not closed under multiplication, because the product of two irrational numbers is always a rational number. b. the irrational number system is not closed under multiplication, because the product of two irrational numbers is not always an irrational number. c. the irrational number system is closed under multiplication, because the product of two irrational numbers is always an irrational number. d. the irrational number system is closed under multiplication, because the product of two irrational numbers is always a rational numbers. reset submit