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.

Someone answer this asap for gabriella uses the current exchange rate to write the function, h(x), where x is the number of u.s. dollars and h(x) is the number of euros, the european union currency. she checks the rate and finds that h(100) = 7.5. which statement best describes what h(100) = 75 signifies? a. gabriella averages 7.5 u.s. dollars for every 100 euros. b. gabriella averages 100 u.s. dollars for every 25 euros. c. gabriella can exchange 75 u.s. dollars for 100 euros. d. gabriella can exchange 100 u.s. dollars for 75 euros.