At the school carnival, the sixth graders are making directional arrows, as shown below. A polygon is shown. The polygon is shaped like an arrow. The total height of the arrow head and the arrow tail is 10 inches. The base of the arrow tail is 4 inches. The width of the arrow is 6 inches and the height of the tail of the arrow is 7 inches.

Each arrow is to be painted red. How much area needs to be painted for 1 arrow?

31 square inches
37 square inches
46 square inches
60 square inches

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.