60. A patient undergoing a heart scan is given a sample of fluorine-18 (1F). After 4 hr, the radioactivity level in the patient is 44.1 MBq (megabecquerel). After 5 hr, the radioactivity level drops to 30.2 MBq. The radioactivity level Q (t) can be approximated by Q (1) = loe- where t is the time in hours after the initial dose Qo is administered. a. Determine the value of k. Round to 4 decimal places. b. Determine the initial dose, On. Round to the nearest whole unit. c. Determine the radioactivity level after 12 hr. Round to 1 decimal place. 61. The population P (t) of a culture of bacteria grows exponentially for the first 72 hr Page 809 according to the model P (t) = Poek. The variable t is the time in hours since the culture is started. The population of bacteria is 60,000 after 7 hr. The population grows to 80,000 after 12 hr. a. Determine the constant k to 3 decimal places. Answer b. Determine the original population Po. Round to the nearest thousand. Answer c. Determine the time required for the population to reach 300,000. Round to the nearest 92021 McGrew Hi

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#60, need help with response A please
60. A patient undergoing a heart scan is given a sample of fluorine-18 (1F). After 4 hr, the
radioactivity level in the patient is 44.1 MBq (megabecquerel). After 5 hr, the radioactivity
level drops to 30.2 MBq. The radioactivity level Q (t) can be approximated by Q (1) = loe-
where t is the time in hours after the initial dose Qo is administered.
a. Determine the value of k. Round to 4 decimal places.
b. Determine the initial dose, On. Round to the nearest whole unit.
c. Determine the radioactivity level after 12 hr. Round to 1 decimal place.
61. The population P (t) of a culture of bacteria grows exponentially for the first 72 hr Page 809
according to the model P (t) = Poek. The variable t is the time in hours since the
culture is started. The population of bacteria is 60,000 after 7 hr. The population grows to
80,000 after 12 hr.
a. Determine the constant k to 3 decimal places.
Answer
b. Determine the original population Po. Round to the nearest thousand.
Answer
c. Determine the time required for the population to reach 300,000. Round to the nearest
92021 McGrew Hi
Transcribed Image Text:60. A patient undergoing a heart scan is given a sample of fluorine-18 (1F). After 4 hr, the radioactivity level in the patient is 44.1 MBq (megabecquerel). After 5 hr, the radioactivity level drops to 30.2 MBq. The radioactivity level Q (t) can be approximated by Q (1) = loe- where t is the time in hours after the initial dose Qo is administered. a. Determine the value of k. Round to 4 decimal places. b. Determine the initial dose, On. Round to the nearest whole unit. c. Determine the radioactivity level after 12 hr. Round to 1 decimal place. 61. The population P (t) of a culture of bacteria grows exponentially for the first 72 hr Page 809 according to the model P (t) = Poek. The variable t is the time in hours since the culture is started. The population of bacteria is 60,000 after 7 hr. The population grows to 80,000 after 12 hr. a. Determine the constant k to 3 decimal places. Answer b. Determine the original population Po. Round to the nearest thousand. Answer c. Determine the time required for the population to reach 300,000. Round to the nearest 92021 McGrew Hi
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