12. Polluted water flows into a pond. The concentration of pollutant, A in the pond at time t minutes is modelled by the equation c(t) = 9 - 90 000 kilograms per C, where c is measured in 10 000 +3t) cubic metre. a) When will the concentration of pollutant in the pond reach 6 kg/m? b) What will happen to the concentration of pollutant over time?
12. Polluted water flows into a pond. The concentration of pollutant, A in the pond at time t minutes is modelled by the equation c(t) = 9 - 90 000 kilograms per C, where c is measured in 10 000 +3t) cubic metre. a) When will the concentration of pollutant in the pond reach 6 kg/m? b) What will happen to the concentration of pollutant over time?
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Please answer question and just send me the paper solutions asap dont type the answer question 12ab ASAP
Transcribed Image Text:1
of 1
the comic books to her brother and then sold the rest on an Internet
website for $330, making a profit of $1.50 on
comic books were in the box? What was the original price of each
comic book?
each
one. How
many
12. Polluted water flows into a pond. The concentration of pollutant,
A
c, in the pond at time t minutes is modelled by the equation
c(t) = 9 - 90 000
kilograms per
1
where c is measured in
10 000 +3r/
cubic metre.
a) When will the concentration of pollutant in the pond reach
6 kg/m?
b) What will happen to the concentration of pollutant over time?
13. Three employees work at a shipping warehouse. Tom can fill an order in
I s minutes. Paco can fill an order in s
in s+ 1 minutes. When Tom and Paco work together, they take about
1 minute and 20 seconds to fill an order. When Paco and Carl work
together, they take about 1 minute and 30 seconds to fill an order.
2 minutes. Carl can fill an order
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