Plutonium-240 decays according to the function \[q(t)=q _{o}e ^{-kt}\] where q represents the quantity remaining after t years and k is the decay constant, 0.00011.. how long will it take 36 grams of plutonium-240 to decay to 12 grams? . a. 18,900 years. b. 1.44 years. c. 9,990 years. d. 2,100 years.

Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?

27 drag each label to the correct location on the image. a particular exosolar system has five planets in total: a, b, c, d, and e. the table lists the orbital periods of these planets in days. planet orbital period (days) a 600 b 80 c 1,000 d 500 e 100 move each planet to its orbit in the system.