ATMOSPHERIC PRESSURE If the temperature is constant, then the atmospheric pressure P (in pounds/square inch) varies with the altitude above sea level h in accordance with the law P = Poe where po is the atmospheric pressure at sea level and k is a constant. If the atmospheric pressure is 15 lb/in.? at sea level and 12.5 lb/in.? at 4000 ft, find the atmospheric pres- sure at an altitude of 12,000 ft.

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Chapter1: Functions And Models
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ATMOSPHERIC PRESSURE If the temperature is constant, then
the atmospheric pressure P (in pounds/square inch) varies
with the altitude above sea level h in accordance with the law
P = Poe kh
where po is the atmospheric pressure at sea level and k is a
constant. If the atmospheric pressure is 15 lb/in.? at sea
level and 12.5 lb/in.? at 4000 ft, find the atmospheric pres-
sure at an altitude of 12,000 ft.
RADIOACTIN
ACTIVE DECAY The radioactive element polonium
decays according to the law
Q(t) = Q, · 2-/140)
%3D
where Qo is the initial amount and the time t is measured in
days. If the amount of polonium left after 280 days is
20 mg, what was the initial amount present?
Transcribed Image Text:ATMOSPHERIC PRESSURE If the temperature is constant, then the atmospheric pressure P (in pounds/square inch) varies with the altitude above sea level h in accordance with the law P = Poe kh where po is the atmospheric pressure at sea level and k is a constant. If the atmospheric pressure is 15 lb/in.? at sea level and 12.5 lb/in.? at 4000 ft, find the atmospheric pres- sure at an altitude of 12,000 ft. RADIOACTIN ACTIVE DECAY The radioactive element polonium decays according to the law Q(t) = Q, · 2-/140) %3D where Qo is the initial amount and the time t is measured in days. If the amount of polonium left after 280 days is 20 mg, what was the initial amount present?
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