# Posts by echo

Total # Posts: 10

**check my work**

Do you have the answers Cj?

*September 2, 2015*

**statistic**

A random sample of size n = 72 is taken from a finite population of size N = 644 with mean μ = 239 and variance σ2 = 325. Use Table 1. a-1. Is it necessary to apply the finite population correction factor? Yes No a-2. Calculate the expected value and the standard ...

*February 5, 2015*

**health**

I am laughing so hard that we all had the same idea.

*August 11, 2012*

**Psychology**

The facial-feedback hypothesis tells us that? A. smiling makes a person feel better. b. facial expressions are of little importance in communicating. c. we can tell how a person is feeling by his or her facial expression. d. smiling is often a cover-up for emotional disorders...

*July 16, 2012*

**maths**

if alpha and beta are the zeros of the polynomial 2x^2-4x+5 then find the values of (i)alpha^2+beta^2 (ii)1/alpha^2+1/beta^2 (iii)(r)alpha/beta+(r)beta/alpha (iv)alpha^-1+beta^-1

*June 7, 2012*

**chemistry**

Consider a system consisting of two oppositely charged spheres hanging by strings and separated by a distance r1, as shown in the accompanying illustration. Suppose they are separated to a larger distance r2 , by moving them apart along a track. What is the potential energy, ...

*October 11, 2011*

**Linear**

30 minute: 20 1 hours: 20 2 hours: 0 Maximize P=40000

*February 21, 2011*

**Communications**

Ethics may be viewed in communication as

*December 6, 2009*

**english**

CAN SOMEONE HELP ME IN GETTING STARTED WRITING A NARRATIVE POEM IN THE ANGLO-SAXON STYLE OF BEOWULF?

*October 24, 2009*

**english**

CAN SOMEONE HELP ME IN STARTING A NARRATIVE POEM IN THE ANGLO-SAXON STYLE OF BEOWULF?

*October 20, 2009*

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