Compute the lower and upper limits of a 95% confidence interval to estimate the difference of the mean checkout times for all customers. estimate the difference for the old machine minus the new machine, so that a positive result reflects faster checkout times with the new machine. use the satterthwaite approximate degrees of freedom, 94.99897. give your answers precise to at least three decimal places.

Please see attachment .

Step-by-step explanation:

Please see attachment .

i can answer this question sweetie!

step-by-step explanation:

the solution of the equation is 2.23 ⇒ answer b

step-by-step explanation:

* lets revise the meaning of exponential function

- the form of the exponential function is y = ab^x, where a ≠ 0, b > 0 ,  

  b ≠ 1, and x is any real number

- it has a constant base b

- it has a variable exponent x

- to solve an exponential equation, take the log or ln of both sides,  

  and solve for the variable

* lets solve the problem

∵

- the base is 7 and the exponent is x

- insert ㏑ in both sides

∴

- use the rule

∴ x ㏑(7) = ㏑(77)

- to find x divide both sides by ㏑(7)

∴

* the solution of the equation is 2.23 to the nearest 2 decimal places