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Hi their, I am revising for my gcse exam in 5 weeks and a few topics that I'm struggling with is Circle Theorems and Trigonometry and so if anyone could help me I would be very grateful. Thank you so much!!!
I'm a bit stuck on this question if anyone can help me?
Last year a new mobile phone company, Sonia, produced and stocked shops with 200,000 of their new phone, Sonia 1. The distribution of the battery times is approx- imately normal. Sonia claims that the mean battery time is 16 hours. If the claim is true, which of the following would be more likely? (a) A random sample of 10 phones having a mean battery time greater than 18 hours or (b) A random sample of 50 phones having a mean battery time greater than 18 hours Justify your answer in no more than five sentences.
Hey! Could anyone help me with this question? It would be much appreciated, thank you!
Find the values of 'x' for which the function f(x)=2x+3+ (18/x-4) is increasing.