Mathematics, 05.05.2020 07:14 xbeatdroperzx
A company provides portable walkie-talkies to construction crews. Their batteries last, on average, 55 hours of continuous use. The purchasing manager receives a brochure advertising a new brand of batteries with a lower price, but suspects that the life time of the batteries may be shorter than the brand they currently in use. To test this, the new brand is installed in 8 randomly selected radios. Here are the results for the lifetime of the batteries (in hours).
45 5256 55 51 57 48 51
(A) Is the sufficient evidence to conclude that the purchasing manager is correct in his conjecture that the new brand has a shorter average lifetime?
Answers: 3
Mathematics, 21.06.2019 19:00
Amodel rocket is launched from a roof into a large field. the path of the rocket can be modeled by the equation y = -0.04x^2 + 8.6x + 4.8, where x is the horizontal distance, in meters, from the starting point on the roof and y is the height, in meters, of the rocket above the ground. how far horizontally from its starting point will the rocket land? a. 0.56 m b. 215.56 m c. 431.11 m d. 215.74 m
Answers: 1
Mathematics, 21.06.2019 23:30
Identify the slope an intercept of the following linear equation y = 1/5x - 6 a. slope: 1/5; intercept: -6 b. slope: 5; intercept: -6 c. slope: -1/5; intercept: 6 d. slope: 1/5; intercept: 6
Answers: 2
A company provides portable walkie-talkies to construction crews. Their batteries last, on average,...
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