Exponential Growth and Decay Help? (2 Viewers)

[Heresy]

I need help with part c (mainly with how fast the salt is dissolving) and d please, any help would be appreciated. Thanks.

 

[integral95]

When you're finding the rate, or how fast or slow something is, you use the derivative expression.

so for c)
you find dS/dt and then sub in t = 5 and your value of k from part b), that's your rate.

d)sub S = 4 (as that's the amount that's left undissolved ) and your k from b)

Then you solve for t, assuming you have you the logarithm knowledge to work out the algebra.

 

[Heresy]

When you're finding the rate, or how fast or slow something is, you use the derivative expression.

so for c)
you find dS/dt and then sub in t = 5 and your value of k from part b), that's your rate.

d)sub S = 4 (as that's the amount that's left undissolved ) and your k from b)

Then you solve for t, assuming you have you the logarithm knowledge to work out the algebra.

Thanks.