A large tank originally contains 1000 litres in which 5 kilograms of salt is dissolved. Pure water is allowed to enter the tank at a rate of 16 litres per minute, and the well stirred mixture is allowed to flow out of the tank at a rate of 18 litres per minute. If A(t) is the amount of salt (in kilograms) in the tank at time t (in minutes), then which of the following initial value problems is satisfied by A(t)?

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter5: Inverse, Exponential, And Logarithmic Functions
Section5.6: Exponential And Logarithmic Equations
Problem 64E
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A large tank originally contains 1000 litres in which 5 kilograms of
salt is dissolved. Pure water is allowed to enter the tank at a rate of
16 litres per minute, and the well stirred mixture is allowed to flow
out of the tank at a rate of 18 litres per minute. If A(t) is the
amount of salt (in kilograms) in the tank at time t (in minutes), then
which of the following initial value problems is satisfied by A(t)?
Select one:
dA
18A
16
A(0) = 5
a.
dt
1000 + 2t
dA
O b.
dt
18A
0; A(0) = 5
1000
2t
dA
O C.
dt
18A
0; A(0) = 5
1000 +2t
O d. None of these
dA
18A
A(0)= 5
2t
16
e.
dt
1000
直
acer
Transcribed Image Text:A large tank originally contains 1000 litres in which 5 kilograms of salt is dissolved. Pure water is allowed to enter the tank at a rate of 16 litres per minute, and the well stirred mixture is allowed to flow out of the tank at a rate of 18 litres per minute. If A(t) is the amount of salt (in kilograms) in the tank at time t (in minutes), then which of the following initial value problems is satisfied by A(t)? Select one: dA 18A 16 A(0) = 5 a. dt 1000 + 2t dA O b. dt 18A 0; A(0) = 5 1000 2t dA O C. dt 18A 0; A(0) = 5 1000 +2t O d. None of these dA 18A A(0)= 5 2t 16 e. dt 1000 直 acer
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