-0.0244t Strontium-90 is a radioactive material that decays according to the function A(t) = Age that a scientist has a sample of 500 grams of strontium-90. (a) What is the decay rate of strontium-90? (b) How much strontium-90 is left after 10 years? (c) When will only 400 grams of strontium-90 be left? where A is the initial amount present and A is the amount present at time t (in years). Assume

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Strontium-90 is a radioactive material that decays according to the function A(t) = Age
that a scientist has a sample of 500 grams of strontium-90.
(a) What is the decay rate of strontium-90?
(b) How much strontium-90 is left after 10 years?
(c) When will only 400 grams of strontium-90 be left?
(d) What is the half-life of strontium-90?
(a) The decay rate of strontium-90 is
%.
(Type an integer or a decimal. Include the negative sign for the decay rate.)
-0.0244t
(b) Approximately
grams of strontium-90 is left after 10 years.
(Do not round until the final answer. Then round to the nearest whole number as needed.)
(c) Only 400 grams of strontium-90 will be left in about years.
(Do not round until the final answer. Then round to the nearest tenth as needed.)
(d) The half-life of strontium-90 is approximately years.
(Do not round until the final answer. Then round to the nearest tenth as needed.)
, where A is the initial amount present and A is the amount present at time t (in years). Assume
Transcribed Image Text:Strontium-90 is a radioactive material that decays according to the function A(t) = Age that a scientist has a sample of 500 grams of strontium-90. (a) What is the decay rate of strontium-90? (b) How much strontium-90 is left after 10 years? (c) When will only 400 grams of strontium-90 be left? (d) What is the half-life of strontium-90? (a) The decay rate of strontium-90 is %. (Type an integer or a decimal. Include the negative sign for the decay rate.) -0.0244t (b) Approximately grams of strontium-90 is left after 10 years. (Do not round until the final answer. Then round to the nearest whole number as needed.) (c) Only 400 grams of strontium-90 will be left in about years. (Do not round until the final answer. Then round to the nearest tenth as needed.) (d) The half-life of strontium-90 is approximately years. (Do not round until the final answer. Then round to the nearest tenth as needed.) , where A is the initial amount present and A is the amount present at time t (in years). Assume
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