Mohon diberikan petunjuk ya kakak-kakak. Dari pengalaman selama ini, suatu perusahaan penerbangan memastikan bahwa rata-rata berat bagasi yang dibawa oleh penumpang untuk rute Jakarta – Surabaya adalah 20 kg dengan simpangan baku 5 kg dan terdistribusi normal. Pesawat selalu terisi penuh dengan 100 penumpang. Pilot pesawat akan meminta tambahan bahan bakar ekstra sebesar 125 kg apabila total bagasi penumpang melebihi 2075 kg. Berapa peluang bahwa pesawat membutuhkan bahan bakar ekstra?

You are cycling around europe with friends. you book into a hostel and you ask the owner what the ratio of men to women is currently staying there. there are 24 men and 6 women. what is the ratio of men to women in its simplest form?

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.

The? half-life of a radioactive substance is 20 years. if you start with some amount of this? substance, what fraction will remain in 120 ? years