The life span of a battery is the amount of time the battery will last. The distribution of life span for a certain type of battery is approximately normal with mean 2. 5 hours and standard deviation 0. 25 hour. Suppose one battery will be selected at random. Which of the following is closest to the probability that the selected battery will have a life span of at most 2. 1 hours?.

Two technicians are discussing how to test a car's exhaust by holding a small piece of paper within an inch of the tailpipe mouth. technician a says that if the paper is vibrating due to a "puffing" output from the tailpipe, this signals a smoothly running engine. technician b says that if the paper is being drawn toward the tailpipe, this could indicate burned exhaust valves. who is correct? a. technician b b. both technicians a and b c. technician a d. neither technicians a or b

Na podstawie bajki jana brzechwy mrówka napisz krótkie ,zabawne opowiadanie.najpierw u³u¿ plan-podziel wiersz na fragmêty mówi¹ce o zachowaniu ka¿dego ze zwierz¹t. nie nadu¿ywaj czasownik- a podzia³ zastosuj synonimy na przyk³ad odpowiedzia³ odpar³ odrzek³ mrukn¹³ w odpowiedzi us³ysza³ on na to w tok opowiadania wpleæ dialogi bohaterów bajki zadanie wykonaj w zeszycie

How are students who take the writing portion of accuplacer graded?