Mathematics, 23.12.2020 21:20, jessicascott120305
21) A consumer group was interested in comparing the operating time of cordless toothbrushes manufactured by two different companies. Group members took a random sample of 18 toothbrushes from Company A and 15 from Company B. Each was charged overnight and the number of hours of use before needing to be recharged was recorded. Company A toothbrushes operated for an average of 119.7 hours with a standard deviation of 1.74 hours; Company B toothbrushes operated for an average of 120.6 hours with a standard deviation of 1.72 hours. The 90% confidence interval is (-1.93, 0.13). The correct interpretation is
Answers: 2
Mathematics, 21.06.2019 19:30, markel19
The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 0 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)
Answers: 3
Mathematics, 21.06.2019 23:20, savannahvargas512
For which pairs of functions is (f•g)(x)=12x? f(x)=3-4x and g(x)=16x-3 f(x)=6x2 and g(x)= 2/x f(x)= and g(x) = 144x f(x)=4x and g(x) =3x
Answers: 1
Mathematics, 22.06.2019 02:00, CJunc95801
The statement tan theta= -12/5, csc theta=-13/12, and the terminal point determained by theta is in quadrant two
Answers: 3
21) A consumer group was interested in comparing the operating time of cordless toothbrushes manufac...
Mathematics, 28.10.2020 04:40
Mathematics, 28.10.2020 04:40
Mathematics, 28.10.2020 04:40
Mathematics, 28.10.2020 04:40
English, 28.10.2020 04:40