Thursday

February 11, 2016
Total # Posts: 2,254

**MAth(algebra)**

7/2x - 5/x = 5 solve the equation check your answer
*February 25, 2012*

**Algebra**

There are 37 students in an algebra class. there are 9 more girls than boys. how many boys and how many girls are in the class? I have to use systems of equations to solve.
*February 23, 2012*

**Science**

b precipitation
*February 21, 2012*

**Pre-Algebra**

thanks for your help ms.sue .
*February 15, 2012*

**Pre-Algebra**

Can somebody help me... I need to know how to do 2x - 8 = 16
*February 15, 2012*

**Math **

Yessica needs to buy some wood to build a box. She mu8st calculate the surface area of the box to determin ehow much wood to buy. The box must me 2 feet long and 3 feet wide. I need the answer to this question ?
*February 13, 2012*

**Chemistry**

ln (A)t - ln(A)o = -kt ln2.00x10-2 - ln(9.30x10-2) = -.68 t t = 2.26s Hope this is right!
*February 9, 2012*

**statistics**

18 young adults you need 108 cups of water and 72 cups of water show how to sclae down this ratio to feed 3 young adults
*February 9, 2012*

**Public Health**

Warnings for an outbreak of an Asian avian virus have been circulating since 1997, although only isolated incidences have occurred since then. Still, reputable scientists are still concerned that this virus could mutate at any time and cause a world-wide health crisis. a. Is ...
*February 9, 2012*

**physics**

Objects of masses m1 = 4.00 kg and m2 = 9.00 kg are connected by a light string that passes over a frictionless pulley as in the figure below. The object m1 is held at rest on the floor, and m2 rests on a fixed incline of θ = 38.0°. The objects are released from rest...
*February 9, 2012*

**Public Health**

A screening test was used to identify carriers for a gene causing prostate cancer. Discuss the social, legal, and moral implications of using the results of the test.
*February 7, 2012*

**English**

Which statement about the narrator's son is the best example of pathos? A. "The boy had a good appetite, so I didn't have to make him eat." B.He was four, a little brown boy in blue rompers, and when he talked and laughed. . .his voice was soft. . ." C.I...
*February 6, 2012*

**Public Health**

A screening test was used to identify carriers for a gene causing prostate cancer. Discuss the social, legal, and moral implications of using the results of the test.
*February 5, 2012*

**Public Health**

Do you think it is ethical not to report the side effects of an experimental drug to the government because the beneficial effects are more important? Why?
*February 5, 2012*

**Geometry**

I Need help doing a geometry proof. In the figure below, PQ=RS. Prove PR=QS. ____________________ P Q R S
*February 5, 2012*

**Public Health**

Do you think it should be mandatory to test for congenital anomalies during pregnancy?
*February 3, 2012*

**Public Health**

What significance does the discovery of human genes have for disease prevention and health promotion?
*February 3, 2012*

**Public Health**

There is an airborne disease that is highly contagious and deadly. It is suspected that a passenger in a flight coming from overseas is infected. You are the infectious disease specialist and decide to keep the passengers on the plane until preventive measures are taken. Do ...
*February 3, 2012*

**Math**

From an exterior point P that is h units from a circle of radius r, a tangent line is drawn to the circle. Let y denote the distance from the point P to the point of tangency T. Express y as a fuction of h.
*January 29, 2012*

**Public Health**

In the state of California everyone is provided free healthcare. Research and analyze the affects of social support for public health. Has this program been successful? Evaluate some of the positive and negative aspects of socially supported programs and the long term health ...
*January 27, 2012*

**Public Health**

Your community leaders have noticed an increase in positive STD test reports from the CDC. The nearest health department is more than 30 miles from your community. How might a community become involved in making public health interventions more effective in this situation?
*January 27, 2012*

**Public Health**

well what about mexico?? i read that latin cultures are 3rd in the obesity ranking....
*January 20, 2012*

**Public Health**

well i believe Spanish groups are at risk of obesity than any other ethnic group because they prepare big meals and eat a lot of meals a day....what do you think?
*January 20, 2012*

**Public Health**

just immigration in general
*January 20, 2012*

**Public Health**

any immigrants its a general question
*January 20, 2012*

**Public Health**

How do you think immigration of some ethnic groups has affected their risk of obesity and other chronic diseases? What intervention do you think can help to reduce obesity in children?
*January 20, 2012*

**science**

Ok listed below is the question. I have chosen to use incarcerated women with a mental illness: nature vs. nurture. Population will be women who have been incarcerated and diagnosed with a mental illness between the ages of 18 and 50. I am having trouble identifying what the ...
*January 18, 2012*

**architecture**

Umm help I don't get the difference between 3 minimize 4 with 2 squared in it's place I'm college btw
*January 5, 2012*

**Math**

No you're right!(;
*January 5, 2012*

**HELP!!!!!Piecewise function**

I have to show all my work and I am unsure how to do that??
*January 4, 2012*

**HELP!!!!!Piecewise function **

State the values for f(0) and f(-2) show all your work f(x){(2x-1 if x>1 ,-4 if -1¡Üx<1,2-x^2 if x<-1)
*January 4, 2012*

**algebra**

The area of the wall you are going to paint is 50 feet2. If the width is half the height, what are the dimensions of the wall? In answering this problem follow the steps below: 1. Represent the height as ‘x’ and then write the width in terms of x (for example, 2x, 5....
*January 3, 2012*

**logarithms**

Solve the logarithm equation. Express the solution in exact form only. log[6](64x^3+1)-log[6](4x+1)=1
*January 3, 2012*

**College Algebra**

Solve the following equation in the complex number system x^4+x^3+4x^2+10x-60=0 College Algebra - Reiny, Monday, January 2, 2012 at 11:49pm hint x = 2 and x = -3 are roots so either do long division by x-2 and x+3 to get a quadratic or do it by synthetic division. Solve that ...
*January 3, 2012*

**College Algebra**

so what would my equation be to figure this question out?
*January 2, 2012*

**College Algebra**

Solve the following equation in the complex number system x^4+x^3+4x^2+10x-60=0
*January 2, 2012*

**piecewise function**

State the value of f(0)and f(-2) and Graph
*January 2, 2012*

**piecewise function**

f(x)={2x-1 ifx>1 {-4 if -1¡Üx<1 {2-x^2 if x<1
*January 2, 2012*

**Functions**

Given the following function f(x)=-x^2-10x. Find the domain, range and decreasing intervals?
*January 2, 2012*

**math**

The area of the wall you are going to paint is 50 feet2. If the width is half the height, what are the dimensions of the wall? In answering this problem follow the steps below: 1. Represent the height as ‘x’ and then write the width in terms of x (for example, 2x, 5....
*January 2, 2012*

**College Algebra... HELP**

Thx! could u help me with graphing this
*January 1, 2012*

**College Algebra... HELP**

First I have to figure out the domain,rande and vertical asymptotes
*January 1, 2012*

**College Algebra... HELP**

Determine the domain, range, and vertical asymptote.Graph f(x)=-6-Inx
*January 1, 2012*

**College Algebra**

verify that the functions of f and g are inverse of each other by showing that f(g(x))=x and g(f(x))=x; f(x)=In(x-1),g(x)=1+e^x
*January 1, 2012*

**ENGLISH-HELP!!!!**

How does Euripides portray the realtionship between the human and the divine in the Bacchae?
*December 14, 2011*

**Intermediate algebra**

The number of trout in America, since 1970, is given by the following: y = x2 + 3x + 2 Where x is the number of years and y is the number of trout in the millions. What is the number of trout in the years 1975, 1980, and 1985? Describe the trend of the numbers of trout as the ...
*December 13, 2011*

**Statistics-hypothesis testing**

thank you
*December 13, 2011*

**I am really in need of someone help! Please**

A researcher has collected statistics pretest scores for students representing 3 different age groups 18-30 31-45 45 and up 3 5 10 7 10 2 9 9 8 6 8 8 4 6 5 Do hypothesis test using ANOVA to find if significant difference. Use alpha .05. All hypothesis steps adn find degrees of...
*December 13, 2011*

**Math- Anova**

A researcher has collected statistics pretest scores for students representing 3 different age groups 18-30 31-45 45 and up 3 5 10 7 10 2 9 9 8 6 8 8 4 6 5 Do hypothesis test using ANOVA to find if significant difference. Use alpha .05. All hypothesis steps adn find degrees of...
*December 13, 2011*

**Can anyone do statistics?**

ok thank you. I was really hoping to find someone to help. I am so stumped
*December 13, 2011*

**math-probability**

I am sorry iam confused? Is it 10/49 or is the answer 7/7?
*December 13, 2011*

**PLEASE HELP ME!!!**

A researcher has collected statistics pretest scores for students representing 3 different age groups 18-30 31-45 45 and up 3 5 10 7 10 2 9 9 8 6 8 8 4 6 5 Do hypothesis test using ANOVA to find if significant difference. Use alpha .05. All hypothesis steps adn find degrees of...
*December 13, 2011*

**Chemistry**

counts/min time(hours) 800 0 713 1 450 5 200 12 112 17 a. 5h b. 6h c. 12h d. 99h
*December 10, 2011*

**Chemistry**

The table wasn't available
*December 10, 2011*

**Chemistry**

Tc-99 is a radioactive isotope that decays by beta emission and is used by radiologists in the diagnosis of liver disease. Its decay behavior is shown by the activity-time table. What is its half-life?
*December 10, 2011*

**statistics**

The probability any one widget is free of defects is 0.93. For quality control purposes the company is concerned about bad batches of widgets. If the widgets are shipped in batches of 20, find the probability of at most 2 defective widgets in one batch.
*December 9, 2011*

**science**

help me plz
*December 8, 2011*

**Creative Writing**

mainly about a jewish breast cancer organization called sharsheret, which is hebrew for chain, it links young jewish women all over the world to eachother so they can speak about their illness. and i am also focusing on the gene mutation BCRA 1 and 2 that is most commonly ...
*December 5, 2011*

**Creative Writing**

Anyone have any suggestions for a title on an essay about breast cancer?
*December 5, 2011*

**trig**

a 30 foot ladder leans against a wall at a 71 degree angle of elevztion find the distance of a ladder's base to the wall
*December 3, 2011*

**math**

Jane is taking a class and asks you to help her figure out what her last grade must be in the class to get a 85 in the class. She tells you the following calculation is used to find your final grade: 75+85+90+X ___________ > 4 x is her last score which has not been taken. ...
*November 30, 2011*

**math**

Jane is taking a class and asks you to help her figure out what her last grade must be in the class to get a 85 in the class. She tells you the following calculation is used to find your final grade: 75+85+90+X ----------- > or = to 85 4 x is her last score which has not ...
*November 29, 2011*

**algebra**

Jane is taking a class and asks you to help her figure out what her last grade must be in the class to get a 85 in the class. She tells you the following calculation is used to find your final grade: w2d2 x is her last score which has not been taken. Explain this equation and ...
*November 29, 2011*

**math**

Jane is taking a class and asks you to help her figure out what her last grade must be in the class to get a 85 in the class. She tells you the following calculation is used to find your final grade: w2d2 x is her last score which has not been taken. Explain this equation and ...
*November 29, 2011*

**math - Please help me to understand**

The average selling price of homes in a certain city is $356,300. Assume the variable is normally distributed with a standard deviation of $64,600. If 396 homes are for sale, how many homes will sell for more than $325,000? (Round up to the next whole number.) I don't ...
*November 29, 2011*

**math - Please help me to understand**

The average selling price of homes in a certain city is $356,300. Assume the variable is normally distributed with a standard deviation of $64,600. If 396 homes are for sale, how many homes will sell for more than $325,000? (Round up to the next whole number.) I don't ...
*November 28, 2011*

**Intermediate algebra**

Hello, I am kind stuck on this question In the lab you discover a relationship between the temperature of the air and the speed of sound. You find the speed of sound is never lower than 331 m/s and increases by 60% of the current temperature. a. What is the equation from this ...
*November 28, 2011*

**math**

Did I figure this right? score-mean is 356,300/64,600(SD)= 5.515 My book says that any z values beyond 3.25 us a=0.500. so I multiplied 0.500 by 396 = 198 I this correct?
*November 28, 2011*

**math**

The average selling price of homes in a certain city is $356,300. Assume the variable is normally distributed with a standard deviation of $64,600. If 396 homes are for sale, how many homes will sell for more than $325,000? (Round up to the next whole number.)
*November 28, 2011*

**Statistics**

Please someone help me to understand this. Here is what I figured and it is still wrong. x= 16.50-12.96= 3.54/4.46 (SD)= 0.79 the normal distribution for 0.79 is .285. I then multiplied that by 10,ooo and the answer is: 2,850. The correct answer is 2200 according to the answer...
*November 28, 2011*

**statistics**

If scores are normally distributed with a mean of 3.06 and a standard deviation of 0.84, what percent of the scores is: (a) greater than 3.9? (b) less than 2.22? (c) between 2.22 and 3.9?
*November 28, 2011*

**statistics**

If scores are normally distributed with a mean of 3.06 and a standard deviation of 0.84, what percent of the scores is: (a) greater than 3.9? (b) less than 2.22? (c) between 2.22 and 3.9?
*November 28, 2011*

**chemistry**

An experiment in your laboratory requires 500 mL of a .0200 M solution of Na2CO3. You are given solid Na2CO3, distilled water and a 500 mL volumetric flask Describe how to prepare the required solution showing all calculations and describing each step appropriately.
*November 15, 2011*

**Chemistry**

Please help me arrange these elements in decreasing order of metallic property. I, Mg, Al, Rb, Ca Thank You
*November 14, 2011*

**physics**

Since gauge pressure=p-p_0, you must add p_0 back to the gauge pressure and then multiply by the volume and then divide by atmospheric pressure.
*November 13, 2011*

**Someone plz help me....i need help this is due now**

A set of 50 data values has a mean of 27 and a variance of 16. I. Find the standard score (z) for a data value = 19. II. Find the probability of a data value < 19. III. Find the probability of a data value > 19.
*November 12, 2011*

**Math....please help**

A set of 50 data values has a mean of 27 and a variance of 16. I. Find the standard score (z) for a data value = 19. II. Find the probability of a data value < 19. III. Find the probability of a data value > 19.
*November 12, 2011*

**Math**

A set of 50 data values has a mean of 27 and a variance of 16. I. Find the standard score (z) for a data value = 19. II. Find the probability of a data value < 19. III. Find the probability of a data value > 19.
*November 12, 2011*

**Math**

Find the probability of a data value < 19.
*November 12, 2011*

**MATH**

Assume that the population of heights of male college students is approximately normally distributed with mean of 72.15 inches and standard deviation of 6.39 inches. A random sample of 96 heights is obtained. Show all work. (A) Find P (x > 73.25) (B) Find the mean and ...
*November 11, 2011*

**MATH**

Answer the following: (A) Find the binomial probability P(x = 4), where n = 12 and p = 0.30. (B) Set up, without solving, the binomial probability P(x is at most 4) using probability notation. (C) How would you find the normal approximation to the binomial probability P(x = 4...
*November 11, 2011*

**MATH**

A set of 50 data values has a mean of 27 and a variance of 16. I. Find the standard score (z) for a data value = 19. II. Find the probability of a data value < 19. III. Find the probability of a data value > 19.
*November 11, 2011*

**MATH**

sure what question?
*November 11, 2011*

**MATH**

Construct both an ungrouped and a grouped frequency distribution for the data given below: 207 211 204 208 202 203 211 202 205 212 210 212 204 199 204 201 213 200 204 207
*November 11, 2011*

**MATH**

An insecticide company exposes 10,000 cockroaches to its newest product, and exposes another 10,000 to their previous formula. The researchers use videotape to count how many cockroaches are still alive, and how many appear to be in distress, at 10 second intervals. When the ...
*November 11, 2011*

**MATH**

(A) Classify the following as an example of nominal, ordinal, interval, or ratio level of measurement, and state why it represents this level: zip codes for the state of Pennsylvania (B) Determine if this data is qualitative or quantitative: Nationality (C) In your own line of...
*November 11, 2011*

**math**

rectangular roof of hospital has width of 80ft, and area of 16,000sq ft. what is length and perimeter of roof
*November 10, 2011*

**Math**

For the table that follows, answer the following questions: x y 1 -8 2 -11 3 -14 4 - Would the correlation between x and y in the table above be positive or negative? - Find the missing value of y in the table. - How would the values of this table be interpreted in terms of ...
*November 10, 2011*

**Math**

Rank the following data in increasing order and find the positions and values of both the 39th percentile and 67th percentile. 5 9 9 0 7 2 5 6 9 1 0 6
*November 10, 2011*

**Math**

The following data lists the average monthly snowfall for January in 15 cities around the US: 42 45 8 18 45 15 31 46 3 33 2 6 32 47 36 Find the mean, variance, and standard deviation.
*November 10, 2011*

**Math**

Given the following frequency distribution, find the mean, variance, and standard deviation. Class Frequency 31-33 18 34-36 25 37-39 22 40-42 9 43-45 20
*November 10, 2011*

**Math**

Given the following frequency distribution, find the mean, variance, and standard deviation. Class Frequency 31-33 18 34-36 25
*November 10, 2011*

**MATH...PLZ HELP**

Given a level of confidence of 99% and a population standard deviation of 13, answer the following: (A) What other information is necessary to find the sample size (n)? (B) Find the Maximum Error of Estimate (E) if n = 61. Show all work.
*November 6, 2011*

**Chemistry**

If there is a radiation that has a half life of 10 days and we have it for 110 days, what will be the fraction of radiation left?
*November 6, 2011*

**Physics**

A ball player hits a home run, and the baseball just clears a wall 17.0 m high located 124.0 m from home plate. The ball is hit an an angle of 35° to the horizontal, and air resistance is negligible. Assume the ball is hit at a height of 1.0 m above the ground. (a) What is...
*November 6, 2011*

**Adverbs and other parts of speech**

which one of the following words phrases if the superlative form of an adjective? A.Less B.Slower C.Most active D.more rapidly
*November 4, 2011*

**chemistry**

Assume that you have 2.10 of the deadly gas hydrogen cyanide, . What is the volume of the gas at STP?
*November 2, 2011*

**General Chemistry**

c3h8+5o2 3co2+4h2o How many kg of propane only is in a 20lb tank?
*October 30, 2011*

**Chemistry**

I got that delta H=-24.4 and delta G=-24.3... But keep getting the equilibrium constant (K) wrong... Can someone please help...
*October 30, 2011*

**Chemistry**

a. Calculate the delta H, delta G, and equilibrium constant for the reaction of methane with Cl2 to give CH3Cl and HCl. Use the following information for your calculations: Bond Dissociation Energies: CH3-H (104.8kcal/mol), Cl-Cl(59.0 kcal/mol), CH3-Cl(85.0 kcal/mol), and H-Cl...
*October 30, 2011*