When Sami showed her mother her shape picture. Mrs. Harper decided she would glue the pieces on a white mounting board and frame the puzzle so Sami could hang it in her room. The mounting board is 12 inches by 15 inches and there will be a colored mat on top of the mounting board that Trames the letter S, which will be placed in the center of the mat and board. The mat is 1.5 inches on all sides. What is the radius of each semicircle

Atechnician compares repair costs for two types of microwave ovens (type i and type ii). he believes that the repair cost for type i ovens is greater than the repair cost for type ii ovens. a sample of 6767 type i ovens has a mean repair cost of $79.79$⁢79.79. the population standard deviation for the repair of type i ovens is known to be $19.18$⁢19.18. a sample of 5555 type ii ovens has a mean repair cost of $75.24$⁢75.24. the population standard deviation for the repair of type ii ovens is known to be $21.40$⁢21.40. conduct a hypothesis test of the technician's claim at the 0.050.05 level of significance. let μ1μ1 be the true mean repair cost for type i ovens and μ2μ2 be the true mean repair cost for type ii ovens. step 2 of 4 : compute the value of the test statistic. round your answer to two decimal places.