Sharla opened a savings account with an initial deposit and then deposited $10 each week after that for 20 weeks. She did not wi
thdraw any money
during that time. The table shows the amount of money inSharla's savings account at certain weeks after the initial deposit.
during that time. The table shows the amount of money inSharla's savings account at certain weeks after the initial deposit.
1 answer:
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Answer:
dA/dt= 12-2A(t)/900+t
Step by step Explanation:
Given:
rate of 3 gal/min
concentration of the solution entering is 4 lb/gal,
The equation of the solution can be expressed as
dA/dt = R(1)- R(2)
Where R(1)=( concentration of the salt at inflow* rate of input of given brine)
R(2)= ( concentration of the salt at inflow* rate of output of given brine)
R(1)= 3 gal/min× 4 lb/gal=12Ib/min
But the solution is been pumped slowly, the rate of the accumulation can calculated as;
(3 gal/min- 2 gal/min)=1gal/min
But after t min we will be having 900+t gallons present in the tank
CHECK THE ATTACHMENT FOR COMPLETE EXPLANATION
