This just wants the derivative which you can solve for.
You can do this using a negative expononet or using ...the rational rule forget its name*.... you shoudl get 9000/(t+12)^2
*Quotient rule
A. replace pi with 3.14 and check
<span>i dont think i know how to solve this one
</span>
The length written in scientific notation is 85 x 10^-6
Answer: 
Step-by-step explanation:
Given : Sample size : n=69
Sample mean : 
Standard deviation : 
Significance level : 
Then , Critical value : 
The formula to confidence interval is given by : -

Hence, the 95% confidence interval for the number of chocolate chips per cookie for big chip cookies= 