Recent content by Amy-Lee

Homework Statement Consider an infinite population with the mean of 160 and a standard deviation of 25. A random size 64 is taken from this population. What does the standard deviation of the sample mean equal to? Homework Equations How do I answer this question without a given...

I will, thank you so much for all your help and patience.

So is the conjugate base of NH2- N3-?

negative

nh ?

When species donates a proton, it becomes the conjugate base; when a species gains a proton, it becomes a conjugate acid... NH2- + H2O -> NH3 + OH- NH2- becomes a conjugate acid

Homework Statement Indicate the conjugate bases of the following: NH2- NH2- Homework Equations The Attempt at a Solution This is the only information given. Can I assume that these species react with water? The ionic signs indicate that they are bases, but are they the...

Thank you

Pravesh and Solly usually go to a coffee shop during their lunch break and toss a coin to see who will pay. The probability that Prevesh will pay three days in a row is (1) 0.025 (2) 0.500 (3) 0.125 (4) 0.015 My attempt (I am not sure if this is right) X= number of days that Prevesh...

thanks TT, I will try that

I don't understand the last part of what you said

what about a homogeneous system of equations with more unknowns than equations, does the above also apply?

determinant = 0, homogeneous equation equals zero... therefore trivial solution determinant not to equal 0, homogeneous equation don't equal 0... therefore nontrivial solution?

Thank you Tiny Tim!:approve: