"To obtain information on the corrosion-resistance proper-ties of a certain type of steel conduit, 45 specimens are buried in soil for a 2-year period. The maximum penetra-tion (in mils) for each specimen is then measured, yielding a sample average penetration of x552.7 and a sample standard deviation of s54.8. The conduits were manufac-tured with the specification that true average penetration be at most 50 mils. They will be used unless it can be demon-strated conclusively that the specification has not been met. What would you conclude?"

How many of the 250 grandparents in the population would you expect to prefer online shopping with merchant a? merchant a: 4 merchant b: 6 merchant c: 2 merchant d: 3 other: 5 none: 5 answer choices: a.about 4 b.about 8 c.about 40 d.about 21

Me, the vertices of quadrilateral coat are c(2,0), o(7,0), a(7,2) and t(2,2). prove that coat is a rectangle.

The avenues in a particular city run north to south and are numbered consecutively with 1st avenue at the western border of the city. the streets in the city run east to west and are numbered consecutively with 1st street at the southern border of the city. for a festival, the city is not allowing cars to park in a rectangular region bordered by 5th avenue to the west. 9th avenue to the east, 4th street to the south, and 6th street to the north. if x is the avenue number and yis the street number, which of the following systems describes the region in which cars are not allowed to park? 5th ave 9th ave