Recent content by hsd

I've added a screenshot (https://imgur.com/a/isQXZ) and the text below for your convenience. Please show steps if possible to help my understanding. Thank you. Consider a random variable that is Normally distributed, with population mean mu = E [X] and population variance sigma^2 = var [X]...

Homework Statement At noon, ship A is 50km west of ship B. Ship A is sailing south at 30km/h and ship B is sailing north at 20km/h. How fast is the distance between the ships changing at 4:00pm in km/h. Homework Equations The Attempt at a Solution...

Homework Statement The count in a bateria culture was 200 after 15 minutes and 1500 after 40 minutes. Find the population after 120 minutes. Homework Equations A=Pe^(rt) The Attempt at a Solution I did P=60e^(.0806 x 120) P= 952023.0848 (answer is wrong)

I think I am applying the rule wrong. This is what I did: (f-g)'(f)-(f)'(f-g)/(f-g) [(-2)(-2)]'[-2]-[-2]'[(-2)(-9)]/[(-2)(-9)] 8-22/-11 -14/-11 (wrong answer) Can you please tell me what it is that I am doing wrong?

Homework Statement F(3)=−2, g(3)=9, f′(3)=−2, and g′(3)=2, find the following numbers: (a) (f+g)′(3) (b) (fg)′(3) (c) (f/g)′(3) (d) (f/(f−g))′(3)The Attempt at a Solution I already have (a) and (b) [a=0 and b=-22] for (c) i tried: (g(x)*f'(x) - f(x)g'(x)) / (g(x))^2 evaluate at 3...

(a) Show that the function g(x) =[3 + sin(1/x-2)]/[1 + x^2] is bounded. This means to find real numbers m; M is an lR such that m ≤ g(x) ≤ M for all x is an lR (and to show that these inequalities are satisfied!). (b) Explain why the function: f(x) = { [x-2] [3 + sin(1/x-2)]/[1 + x^2] ...