Dawn is laying computer cables in the ceiling of a large building. A 175-ft cable to office B1 and a 420-ft cable to office B2 meet at a right angle. Offices B1 and B2 are both on the outer wall of the building. If Dawn lays one
cable from where the first two cables meet directly to the outer wall, how far will it be from there to office B1?
Round your answer to the nearest tenth.
A) 79.1 ft
B) 227.5 ft
C) 67.3 ft
D) 455.0 ft

Please work it out!

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.