Question

Please help on my question I have the graph part done, I need help on the other parts

Answer 1

the Here the equation of amount of salt in the barrel at time t is given by

`Q(t)=21(1-e^(-0.06t))`

a

At time t=7 minute the amount of salt will be

`Q(7)=21(1-e^(-0.06*7))\Rightarrow Q(7)=21*0.342953\Rightarrow Q(7)=7.20`

The amount of salt after 7 min will be 7.20lb.

b

At time t=14minute the amount of salt will be

`Q(14)=21(1-e^(-0.06*14))\Rightarrow Q(14)=11.93`

Amount of salt will be 11.93 lb

d

From the graph, for large t the value Q(t) the amount of salt approaches to 21 lb.