The half-life of krypton-91 (* K>) is 10 seconds. At time t= 0, a heavy canister contains 3 grams of this radioactive gas. a. Find a function 4(1) = P,M that models the amount of " Krremaining in the canister after t seconds. b. Find a function A(r) – Po" that models the amount of " Krremaining in the canister after t seconds. c. How much " Kr remains after 2 minutes? d. After how long will the amount of " Kr remaining be reduced to 1 ug (microgram or 10* grams?

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