Answer: Sample size required is 35
Step-by-step explanation:
The attachment below shows the calculations.
Answer: A
Step-by-step explanation: you go 10 to the 8th^, and 10 to the 6th^
Answer: 15 x (1/3)
Step-by-step explanation: 15 divided by 3 is 15 right. When you multiple 15 and 1/3 it is like taking one third out of 15. One third out of 15 is 5. Hope this helped! :P
The amount of salt in the tank changes with rate according to


which is a linear ODE in
. Multiplying both sides by
gives

so that the left side condenses into the derivative of a product,

Integrate both sides and solve for
to get


Given that
, we find

and we get the particular solution

