Mathematics, 13.04.2021 01:50 hhvgbv49551
A manufacturer claims that the mean lifetime of its drill is 1000 hours. A homeowner selects 25 drills and finds the mean lifetime to be 980 hours with a sample standard deviation of 80 hours. If = 0.05, test the manufacturer's claim.
Answers: 3
Mathematics, 21.06.2019 17:40
Find the volume of the described solid.the solid lies between planes perpendicular to the x-axis at x = 0 and x=7. the cross sectionsperpendicular to the x-axis between these planes are squares whose bases run from the parabolay=-31x to the parabola y = 30/x.a) 441b) 147c) 864d) 882
Answers: 1
Mathematics, 21.06.2019 23:00
Someone answer this asap for the function f(x) and g(x) are both quadratic functions. f(x) = x² + 2x + 5 g(x) = x² + 2x - 1 which statement best describes the graph of g(x) compared to the graph of f(x)? a. the graph of g(x) is the graph of f(x) shifted down 1 units. b. the graph of g(x) is the graph of f(x) shifted down 6 units. c. the graph of g(x) is the graph of f(x) shifted to the right 1 unit. d. the graph of g(x) is the graph of f(x) shifted tothe right 6 units.
Answers: 3
Mathematics, 22.06.2019 01:00
Suppose the equation ||x-a|-b|=2008 has 3 distinct real roots and a not =0. find the value of b.
Answers: 1
A manufacturer claims that the mean lifetime of its drill is 1000 hours. A homeowner selects 25 dril...
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