Tuesday

October 21, 2014

October 21, 2014

Number of results: 142,638

**Stats**

Give the numerical value for each of the following descriptions concerning normal distributions by referring to the table standard unit normal distribution for N(0,1) The 5th percentile of N(20,36) Mean and variance
*October 9, 2010 by Vee*

**statistics**

The statement 'The median of a distribution is approximately equal to the mean of the distribution' can be made true by adding which of the following: a. For all distributions b. only for symmetric, mound-shaped distributions c. For skewed distributions d. For symmetric ...
*December 23, 2007 by Anonymous*

**Chemistry/Normal Distributions/Math**

I'm confused on how to calculate the standard deviation for this... The 95% confidence limit for calcium in control sera is reported as 9.2-10.2 mg/dl. Calculate the value for one standard deviation and the coefficient of variation for this data.
*January 21, 2013 by Maranda*

**MATH**

Which of the following normal distributions has the smallest spread? A. A normal distribution with mean 1 and standard deviation 3 B. A normal distribution with mean 0 and standard deviation 2 C. A normal distribution with mean 3 and standard deviation 2 D. A normal ...
*December 7, 2010 by KARINA*

**Statistics**

For two normal distributions with the same mean, but different standard deviations, the 95% confidence interval will be: (a) The same for both distributions (b) Larger for the distribution with the smaller standard deviation (c) Smaller for the distribution with the smaller ...
*October 28, 2007 by Thano*

**statistics/probability**

One statistic used to assess professional golfers is driving accuracy, the percent of drives that land in the fairway. Driving accuracy for PGA Tour professionals ranges from about 40% to about 75%. Tiger Woods hits the fairway about 60% of the time. One reason why the Normal ...
*June 17, 2010 by Natash*

**Statistics**

What does it mean when we state: "Many frequency distributions in the social sciences are approximately? And, why does this occur? My thinking is: I would have to say that many frequency distributions, in particularly the social sciences are approximately normal. When working ...
*August 11, 2009 by Bulldog*

**statistics-please please help**

A) Choose one of the following distributions (positively skewed normal distribution, negatively skewed normal distribution or bimodal normal distribution) and generate a sample of 20 numbers for it. The sample you generate should have a mean of 8 and a sample standard ...
*October 7, 2008 by Lauren*

**statistics please help deadline 12am**

find the normal approximation for the binomial probability that x=5,where n=12, and p=0.7compare probability to table b of normal distributions of table 2. The only thing that i know so far is that p(x=5) is equivalent to 0.29. how would i complete this question? please ...
*October 28, 2010 by vedry frustrated please help and show work*

**Staistics**

Give the numerical value for each of the following descriptions concerning normal distributions by referring to the table for N(0,1) The 5th percentile of N(20,36)
*October 9, 2010 by Vee*

**Business Statistics**

1. Suppose that the mean of the annual return for common stocks from 1950 to 2012 was 9.4%, and the standard deviation of the annual return was 17.5%. Suppose also that during the same 62-year time span, the mean of the annual return for long-term government bonds was 4.6%, ...
*March 6, 2013 by Michelle*

**Statistics **

1. The average time it takes for a cellphone to reboot is 3 minutes with a standard deviation of 10 seconds. The average time it takes a computer to restart is 5 minutes with a standard deviation of 15 seconds. Both are normally distributed. Suppose that a cellphone and a ...
*August 27, 2014 by Jessica *

**statistics**

Section 5.3: Normal Distributions: Finding Values Answer the questions about the specified normal distribution. Q1: The lifetime of ZZZ batteries are normally distributed with a mean of 265 hours and a standard deviation ó of 10 hours. Find the number of hours that represent ...
*March 28, 2010 by looking for someone to varify my work please*

**Business Statistics**

In each case, sketch the two speciﬁed normal curves on the same set of axes: a A normal curve with m 20 and s 3, and a normal curve with m 20 and s 6. b A normal curve with m 20 and s 3, and a normal curve with m 30 and s 3. c A normal curve with m 100 and s 10, and a ...
*August 30, 2012 by Marcia*

**statistics**

How do I sketch distributions? I think I'm doing it wrong. Is there an option my friends stats-calc(her calcultor is very tempremental, so i don't know if it'll work) I can utiilzie that'll sketch things for me? thanks. -Sketch a normal distribution with (mu) m =80 and ...
*January 30, 2008 by Gloria*

**math**

Find the value of p in each of these probability distributions x 5 7 9 11 13 P(X=x) p p p 0.12 0.04 x -2 0 1 3 P(X=x) 2/9 1/9 p 2/9 x -4 -1 2 5 8 P(X=x) 0.12 0.24 p 2p 0.07
*September 25, 2013 by kirsten*

**statistics**

Sat scores l around the nation tend to have a mean score around 500, a standard deviation of about 100 points and are approximately normal distributions. a person who scores 600 on the sat 1 has approximately what percentile rank within the population? please show all ...
*October 15, 2010 by please help in panic mode-mary*

**MATH**

What are open-ended frequency distributions? and Why are they necessary?
*August 31, 2011 by FAKAAPO*

**statistics**

Use the Standard Normal Distribution table to find the indicated area under the standard normal curve. Q1: Between z = 0 and z = 2.24 A1: 0 = 0.5000 2.24 = 0.9875 0.9875 – 0.5000 = 0.4875 Q2:To the left of z = 1.09 A2: 0.8621 Q3: Between z = -1.15 and z = -0.56 A3: -1.15 = 0....
*March 27, 2010 by looking for someone to varify my work please*

**Prob and stats\ math**

grading on a curve results in what percent of F's? It depends where you set your cutting points. for example, if you use Z = -2 as your cutting point, the percent below that point, approximately 2.5%, would get F's. However, the cutting point can be arbitrarily set above or ...
*December 20, 2006 by Anonymous*

**STATISTICS**

Scores on the LSAT are approximately normally distributed. In fact, published reports indicate that approximately 40 percent of all test takers score at or between 145 and 155, and about 70 percent score at or between 140 and 160. The full range of scores is 60 pts (120–180). ...
*November 26, 2012 by MARY*

**Stats**

Skewed distributions were discussed in this week’s readings. Think about some of the psychological studies you are familiar with and the constructs investigated in those studies. Describe the study you are referring to and give some examples of the variables from the study ...
*February 18, 2011 by Sheryl*

**res342**

In conducting research that looks at differences in populations, samples are used for numerous reasons. Using entire populations in a test is difficult, so various sampling techniques are applied. In situations in which the population variance is unknown, the Student t ...
*May 14, 2011 by jack*

**Statistics**

Is a sampling distribution always the same as the curve for a null hypothesis? How does the power of a z test change when sigma increases? Assuming that they are caused solely by chance, sampling distributions will approximate a normal distribution more closely as the size of ...
*December 27, 2006 by Cheri*

**Maths**

There are two boxplots, 1 of class A and the other of class B. they both illustrate the height of sunflowers grown in metres. Class A : minimum is 0.9 m, Q3 is 2 m Q1 is 1.5 m ,maximum is 2.8 m Median is 1.9 m Class B : minimum is 1.5 m, Q3 is 2.3 Q1 is 1.8 m, maximum is 2.5 m...
*June 9, 2007 by T*

**statistics**

Which of the following statements are correct? a. A normal distribution is any distribution that is not unusual. b. The graph of a normal distribution is bell-shaped. c. If a population has normal ditribution, the mean and the median are not equal. d. The graph of a normal ...
*May 8, 2010 by Michelle*

**statistics**

which of the following statements are correct? a. a normal distribuiton is any distribution that is not unusual. b. the graph of a normal distribution is bell-shaped. c. if a population has a normal distribution, the mean and the median are not equal. d. the graph of a normal ...
*August 16, 2010 by jeff*

**math**

Your invest $3,000 annually in a mutual fund that earns 10 percent annually and you invest all distributors. How much will you have in the account at the end of 20 years? You invest $3,000 annually in a mutual fund with a 5 percent load fee so that only $2,850 is actually ...
*May 18, 2014 by Skyler*

**Statistics**

For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: A. a sample of 10 with a mean of 44. B.a sample of 1 with a mean of 48. The general population of ...
*November 15, 2010 by Barbara*

**statistics**

For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The general population of ...
*November 19, 2010 by Anonymous*

**Statistics**

For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The general population of ...
*November 19, 2010 by Felicia*

**psy325**

For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The general population of ...
*December 15, 2010 by smith*

**statistics**

For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The general population of ...
*January 24, 2011 by kim*

**Statistics**

For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The general population of ...
*April 4, 2011 by amanda *

**Statistics**

: For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The general population of ...
*June 15, 2011 by Stephanie *

**statistics**

For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The general population of ...
*June 19, 2011 by val*

**statistics**

For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The general population of ...
*June 27, 2011 by brie*

**statistics**

For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The general population of ...
*July 6, 2011 by Dorothy*

**statistics**

For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The general population of ...
*July 19, 2011 by shawn*

**Statistics**

1. Which of the following statements are correct? a. A normal distribution is any distribution that is not unusual. b. The graph of a normal distribution is bell-shaped. c. If a population has a normal distribution, the mean and the median are not equal. d. The graph of a ...
*April 19, 2010 by Jackie*

**statistics**

Which of the following statements are correct? a. a normal distribution is any distribution that is not unusual b. the graph of a normal distribution is bell-shaped c. if a population has a normal distribution, the mean and the median are not equal d. the graph of a normal ...
*May 10, 2010 by Christine*

**Statistics**

Which of the following statements are correct? 1.A normal distribution is any distribution that is not unusual. 2.The graph of a normal distribution is bell-shaped. 3.If a population has a normal distribution, the mean and the median are not equal. 4.The graph of a normal ...
*July 14, 2010 by Christy*

**statistic**

1. Which of the following statements are correct? a. A normal distribution is any distribution that is not unusual. b. The graph of a normal distribution is bell-shaped. c. If a population has a normal distribution, the mean and the median are not equal. d. The graph of a ...
*August 24, 2011 by Sonia*

**Chemistry**

How much heat is required to vaporize 1.00 L of CCl4 at its normal boiling point? The following data are given for CCl4. Normal melting point, -23 degree celcius , normal boiling point, 77 degree celcius density of liquid 1.59 g/mL; ; enthalpy of fusion 3.28 kJ/mol vapor ...
*December 8, 2008 by Ashleigh*

**statistics**

For each of the following samples that were given an experimental treatment, test whether they represent populations that score significantly higher than the general population: (a) a smaple of 100 with a mean of 82, (b) a sample of 10 with a mean of 84. The general population...
*October 2, 2012 by Julie Miranda*

**biology**

In a cross with a mother who carries the allele for hemophilia and a father who has normal blood clotting what would be the expected phenotypes of the offspring? A. all females normal, all males normal B. all females normal, all males with hemophilia C. all females carriers of...
*December 2, 2013 by orpheus*

**Math**

Which of the following is not a characteristic of Students' t distribution? A) For large samples, the t and z distributions are nearly equivalent. B) depends on degrees of freedom. C) symmetric distribution D) mean of 1
*November 28, 2009 by Sue*

**Accounting**

Kathryn, an individual, own all of the outstanding stock in Copper Corporation. Kathryn purchased her stock in Copper 11 years ago, and her basis is $18,000. At the beginning of this year, the corporation has $38,000 of accumulated E &P and no current E&P (before considering ...
*June 9, 2012 by Tina*

**math**

Decide which variables described is likely to have a normal or near normal distribution a. the number of courses remaining until graduation for the students in a small liveral arts college b. the SAT math scores for students in an advanced placement math class i think the ...
*August 7, 2009 by Diana*

**accounting**

Which of the following statements is incorrect? a. The normal balance of accounts receivable is a debit. b. The normal balance of an expense account is a credit. c. The normal balance of the owner's capital account is a credit. d. The normal balance of unearned revenues is a ...
*February 8, 2013 by ashton*

**PROBABILTY**

WHAT IS AN EXAMPLE OF DISCRETE DISTRIBUTION AND CONTINUOUS DISTRIBUTIONS?
*August 12, 2009 by Twg*

**Statistics**

Determine if the following are probability distributions (if no, state why). a. X 3 6 9 12 15 P(X) 4/9 2/9 1/9 1/9 1/9
*February 7, 2014 by Tyler *

**Math T-Distribution**

Which of the following is not a characteristic of Students' t distribution? A) For large samples, the t and z distributions are nearly equivalent. B) depends on degrees of freedom. C) symmetric distribution D) mean of 1
*November 28, 2009 by Ashley*

**Statistics**

If I have 4 standard deviations, how do I find the SD of the distributions of all of them? They are: .15 .16 .14 .15
*May 4, 2008 by MW*

**Physics**

A chain composed of four identical links is suspended by a rope and does not move. How many force vectors would be drawn on the free body diagram of each link and which direction would they point? My answer: ---------- FIRST LINK (top): Upward force from rope (tension), ...
*September 21, 2010 by Stanley*

**Calculus (Normal Line, please check my work)**

The slope of the line normal to the graph of 4 sin x + 9 cos y = 9 at the point (pi, 0) is: Derivative: 4cosx - 9siny(dy/dx) = 0 (dy/dx) = (-4cosx) / (-9siny) (dy/dx) = (4) / 0 Normal line = -1 / (4/0) Does this mean that the slope of the normal line is undefined, or did I do ...
*December 17, 2011 by Mishaka*

**statistics, math, college**

if np >5 and nq>5 estimate P (fewer than 4) with n=13 p=0.4 by using normal distribution as an approximate to the binomial distribution if np <5 or nq< then state that the normal approximation is not suitable
*February 11, 2014 by andrea*

**Statistics**

Many women take oral contraceptives to prevent pregnancy. Under ideal conditions, 1% will become pregnant within one year. In typcal use, 5% become pregnant. Choose 20 random women taking the pill. How many become pregnant in the next year? a. What is the probability that at ...
*August 4, 2010 by Dawn*

**equation of the normal**

An equation of the normal to the graph of f(x) = x / (2x-3) at (1,f(1)) is ........ find f' Then, the slope of the normal will be -1/f' Make the equation g(x)= -1/f' + b put in the point 1, f(1), and solve for b, and you have it.
*December 9, 2006 by Jen*

**college chemistry**

the normal freezing point of the element mercury, Hg(l), is a -38.9°C and its molar enthalpy of fusion, ΔHfusion=2.29 KJ/mol. What is the entropy change (J/K) of the system when 50 g of Hg(l) freezes at the normal freezing point. Hg= 200.59 g/mol
*December 6, 2010 by Jamaal *

**Medical Transcription**

HEENT: normal sulfanilic, normal hair distribution. Does this make sense, I can't understand the word after normal, it sounds like sulfanilic, but I can't determine if this makes sense
*October 30, 2008 by Bean*

**Chemistry**

Are these two answers correct? They are both true or false. Mendeleev was able to predict undiscovered elements. True The noble gases are chemically reactive under normal conditions. False (I don't know what is considered "normal conditions")
*December 24, 2010 by Cheryl*

**genetic homework**

Albinism in humans is inherited as a simple recessive trait. Determine the genotypes of the parents and offspring for the following families. When two alternative genotypes are possible, list both. (a) Two nonalbino (normal) parents have five children, four normal and one ...
*February 11, 2006 by Jody*

**accounting**

what will be the adjusting entry if partners take distributions from their business instead of taking salary?
*October 20, 2010 by priya*

**Chemistry**

Vitamin K is involved in normal blood clotting. When 2.40 g of vitamin K is dissolved in 25.0 g of camphor, the freezing point of the solution is lowered by 8.05 °C. Calculate the molar mass of vitamin K. Kf value is 37.8 and the normal freezing point is 176 degrees C
*October 17, 2013 by Shardai*

**Statistics**

A normal population has an expected value of 60 and a variance of 30. Use the central limit theorem to determine what the sample size should be such that the mean has a probability of 90% to fall between the values 58 and 62. One concept of the Central Limit Theorem is ...
*August 10, 2006 by ruth*

**physics**

A car is rounding a circular curve of radius r on a banked turn. As the drawing indicates, there are two forces acting on the car, its weight mg and the normal force FN exerted on it by the road. Which force, or force component, provides the centripetal force that keeps the ...
*June 1, 2014 by sal64*

**statistics**

Determine whether each of the distributions given below represents a probability distribution. Justify your answer. (A) x 1 2 3 4 P(x) 1/5 5/12 1/3 1/6 (B) x 3 6 8 P(x) 0.2 2/5 0.3 (C) x 20 35 40 50 P(x) 0.3 -0.1 0.5 0.3
*October 4, 2012 by mom*

**Chemistry**

The enthalpy of vaporization of chloroform (CHCl3) is 29.2 kJ mol-1 at its normal boiling point 61.2 Celsius. what is the standard change in entropy for vaporization of chloroform at its normal boiling point? Answer I got was 29.2/334.2 = 0.0873. (CORRECT?)
*April 2, 2013 by Viv*

**Physics**

Which of the following is correct for the reflected ray if a light ray strikes a plane mirror at an angle of 50° from the normal? a. 40° from the surface of the mirror b. 40° from the normal c. 50° from the surface of the mirror d. 90° from the normal I have been stuck on this...
*July 12, 2013 by Jordan*

**Math**

Consider a curve lying on the cylinder x^2 + y^2 = 1 and given by the vector function r(t) = (cost,sin t, t^2), for t ≥ 0. Find equations of normal planes at the points (1, 0, 0) and (1, 0, 4π^2) Hi, I don't really know how to start this. I know the formula for a ...
*December 7, 2012 by A.*

**chemistry**

normal value for blood cholesterol is 200mg/dL. If normal adult has a total blood volume if 5L, how much total cholesterol is present one dl is a tenth of a liter, so 200mg/dl (1liter/10dl)(5)
*September 12, 2006 by michele*

**math 115**

Let x be a continuous random variable that follows a normal distribution with a mean of 200 and a standard deviation 25. Find the value of x so that the area under the normal curve between ì and x is approximately 0.4798 and the value of x is greater than ì.
*November 19, 2013 by louise*

**Statistics**

This is the first question..... For a population that has a standard deviation of 10, figure the standard deviation of the distribution of means for samples of size- (b) 3. This is the second question....For each of the following samples that were given an experimental ...
*May 3, 2011 by Heather*

**psychology**

am needing help I have a paper due on compare and contast Normal and abnormal Psychology My problem is I can not find no information on what is Normal psychology. I have found great information on abnormal psychology with no luck on normal psychology can some one please ...
*July 6, 2008 by tom*

**CHEMISTRY..please help..thanks**

The molar heats of fusion and vaporization for silver are 11.3 kJ/mol and 250. kJ/mol, respectively. Silver's normal melting point is 962°C, and its normal boiling point is 2212°C. What quantity of heat is required to melt 13.0 g of silver at 962°C?
*November 2, 2010 by Jasmin*

**CHEMISTRY..please help..thanks**

The molar heats of fusion and vaporization for silver are 11.3 kJ/mol and 250. kJ/mol, respectively. Silver's normal melting point is 962°C, and its normal boiling point is 2212°C. What quantity of heat is required to melt 13.0 g of silver at 962°C?
*November 2, 2010 by Jasmin*

**Physics**

During a brown-out, the electric power company drops the voltage of the power line and the incandescent light bulbs in your house become dimmer. When this happens, the filaments in the bulbs operate at a lower than normal temperature, so a. their color is somewhat bluer than ...
*January 30, 2013 by Timothy*

**Chemistry**

DrBob222, I don't know how to solve this problem either. And yes, this is the question for this problem. I even double check it. Please help. Chloroform (CHCL3) has a normal boiling point of 61 'C and an enthalpy of vaporization of 29.24 kJ/mol. What is the value of delta Gvap...
*April 30, 2013 by Chloe*

**Electronic Engineering**

Using MATLAB..How to develop a software tool for analysis of the model distributions of a semiconductor laser diode array..??
*October 17, 2007 by Link*

**statistics**

Show that for all three distributions (Binomial, Poisson and Geometric) the probability of finding at least one ace is around 55%
*January 28, 2010 by Charles*

**Chem Help Pls! **

How to sketch Maxwell distributions plots for the following? a) O2 and CO2 at the same temperature b) Ar at 270K and 1000K I really need help with this!
*September 17, 2012 by Dia B *

**statistics**

1. Which of the following statements are correct? a. A normal distribution is any distribution that is not unusual. (True/False) b. The graph of a normal distribution is bell-shaped. (True/False) c. If a population has a normal distribution, the mean and the median are not ...
*August 20, 2011 by ann*

**Physics**

The blood speed in a normal segment of a horizontal artery is 0.166 m/s. An abnormal segment of the artery is narrowed down by an arteriosclerotic plaque to 1/5 of its normal cross-sectional area. What is the difference in blood pressure between the normal and constricted ...
*February 8, 2013 by Ashley*

**computers**

With newer Linux kernel distributions, what happens if you connect a hot-swappable device, such as a USB drive, containing evidence?
*September 29, 2010 by Tom*

**chemistry**

A 2.97 g sample of a molecular compound is dissolved in 103 g of tetrachloromethane (carbon tetrachloride). The normal boiling point of the solution is 61.51C, the normal boiling point of CCl4 is 61.2C. The boiling point constant for CCl4 is 4.95 K · kg/mol. What is the ...
*December 6, 2011 by Aubrey*

**Statistics**

Find an example of application of Normal Distribution (or approximately Normal Distribution) in your workplace or business (or any other business that you are familiar with). Prove that the variable has the characteristics of a Normal Distribution. Recall that the variable ...
*October 8, 2010 by Kathy*

**chemistry**

How much heat is required to vaporize 3.50L of at its normal boiling point? The following data are given for Carbon Tetrachloride. Normal melting point, -23 Degrees Celsius, normal boiling point, 77 Degrees Celsius; density of liquid, 1.59g/mL; Delta H (FUSION): 3.28 kJ mol^-1...
*December 8, 2008 by Linda*

**chemistry**

How much heat is required to vaporize 3.50L of at its normal boiling point? The following data are given for Carbon Tetrachloride. Normal melting point, -23 Degrees Celsius, normal boiling point, 77 Degrees Celsius; density of liquid, 1.59g/mL; Delta H (FUSION): 3.28 kJ mol^-1...
*December 8, 2008 by Linda*

**physics**

please check these for me: What is the wavelength of microwaves of 3.0*10^9 Hz frequency? a. 0.050m b. 0.060m c. 0.10 m d. 0.20 m C If a light ray strikes a flat mirror at an angle of 30deg from the normal, the ray will be reflected at an angle of a. 30deg from the mirror's ...
*March 12, 2009 by physics*

**ap chemistry**

Acid rain has a pH value of 3.0, whereas normal rain has a pH value of 5.6. Calculate the ratio of the hydronium ion in acid rain to that in normal rain.
*February 28, 2013 by cheri*

**statistics**

For any distribution (normal or not normal), the probability of selecting a score greater than the median is
*September 4, 2011 by Helen*

**math**

A broken clover has 2 leaves, a normal clover has 3 leaves, and a luckey clover has leaves. Ia a bunch of these clovers, there are twice as many normal clovers as broken clovers and 5 times as many normal clovers as lucky clovers. the bunch has a total of N leaves. N is ...
*March 9, 2011 by Dharma*

**business math**

A videocassette manufacturer has determined that its weekly cost equation is C = 3000 + 10x, where x is the number of cassettes produced and sold each week. If cassettes are sold for $15 each to distributions, how many must be sold each week for the company to make a profit?
*February 21, 2012 by mina*

**Genetics**

Albinism is inherited as a simple recessive trait. If a woman and her husband are both heterozygous for albinism then what is the probability that their first five children will have these phenotypes? Child 1 - albino; child 2 - normal; child 3 - normal; child 4 - albino; ...
*September 29, 2013 by Hannah*

**Calculus**

Write the equation 4x + 5y – 3 = 0 in normal form. Then, find the length of the normal and the angle it makes with the positive x–axis.
*May 8, 2012 by eddie*

**statistics**

find the z-score corresponding to a score of X=60 for the each of the following distributions. u=50 and 0=10 u=50 and 0=5
*March 3, 2010 by Patricia*

**Chemistry**

A 1.065-g sample of an unknown substance is dissolved in 30.00 g of benzene; the freezing point of the solution is 4.25 degrees C. The compound is 50.69% C, 4.23% H, and 45.08% O by mass. Info you might need on benzene: Normal Freezing point,degrees C: 5.53 Kf, degrees m^1: 5....
*February 25, 2013 by JJ*

**Statistics and Probability**

Why is a normal distribution called "normal"?
*March 19, 2013 by Betty*

**Statistics and Probability**

Why is a normal distribution called "normal"?
*March 19, 2013 by Betty*

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