Saturday

August 27, 2016
Total # Posts: 2,317

**chemistry**

Ethanol (C2H6O) is combusted with oxygen to produce carbon dioxide and wateraccording to the following reaction: C2H6O + 3O2 -----> 2H2O + 3CO2 If 50g of ethanol is combusted, determine the volume of carbon dioxide that will be produced if the temperature is 25oC and the ...
*August 3, 2012*

**Tech Math**

A 490 newton woman stands on a bathroom scale while riding in a elevator that is accelerating downward at 2m/sec/sec. Find her apparent weight and her apparent mass. Compare to her starting mass.
*July 19, 2012*

**Music**

4. -Pop Rock -Soft Rock -Hard Rock
*July 17, 2012*

**Physics (Angular Momentum)**

A solid ball of radius 10cm and mas 8kg rolls in the y direction with a speed of 10 m/s At the instant that it is 3m from the origin along the x axis, what is the angular momentum (mag + direction) about its center of mass?
*July 13, 2012*

**statistics**

An April 15, 2002 report in Time Magazine stated that the average age for women to marry in the United States is now 24.9 years of age. If the standard deviation is assumed to be 4.9 years, find the probability that a random sample of 33 U.S. women would show a mean age at ...
*July 7, 2012*

**statistics**

First graders who misbehave in school may be more likely to be regular smokers as young adults according to a new study presented in the July 2004 issue of the American Journal of Epidemiology. After following a group of U.S. first graders for 15 years, it was found that among...
*July 7, 2012*

**composition**

In Weeks 9 and 10, you will develop an essay using definition as the rhetorical strategy. This week, you will complete your essay. Review the criteria for a definition essay. Continue with the essay you started in Week 9. Expand your definition by including the word's ...
*June 23, 2012*

**Physics**

Three fixed charges are located along a line. The - 2 C charge is 10cm to the left of the +5 C charge and the -4 C charge at 4 cm to the right of the +5 C charge. a.what is the force exerted on the -4 C by the +5C charge? b.what is the force exerted on the -4 C by the -2 C ...
*June 21, 2012*

**Math**

A chain store manager has been told by the main office that daily profit, P is related to the number of clerks working that day, x, according to the equation P= -25x^2 + 300x. What number of clerks will maximize the profit, and what is the maximum possible profit?
*June 18, 2012*

**Math**

If a baseball is projected upward from ground level with an initial velocity of 64 feet per second, then its height is a function of time, give by g(t)= -16^2 + 64t. What is the maximum heigh reached by the ball?
*June 18, 2012*

**Physics Velocity Question**

The equation for the displacement in meters of an object moving in SHM is x(t) = 1.50 cos (4.20t) where t is in seconds. (a) What is the maximum speed of the object? (b) At what time does it first reach the maximum speed? I already got 6.3m/s for A and I got B wrong. I thought...
*June 15, 2012*

**PHYSICS**

A cylindrical metal can with a radius of 4.25 cm is floating upright in water. A rock is placed in the can, causing it to sink 0.0230 m deeper into the water. What is the weight of the rock?
*June 15, 2012*

**accounting**

The annual interest rate for a customer’s loan of $425 is 15.75%. What is the total dollar amount to be repaid on the loan, including principle and interest, for the entire year?
*May 31, 2012*

**Math**

A customer paid $247.13 in interest on a loan of $950.50. What is the percentage of interest paid?
*May 31, 2012*

**Mat 116**

What is the solution of the system 7r - 5s = 36 and 5r + 7s = 68
*May 30, 2012*

**physics**

The route followed by a hiker consists of three displacement vectors , , and . Vector is along a measured trail and is 1060 m in a direction 20.0 ° north of east. Vector is not along a measured trail, but the hiker uses a compass and knows that the direction is 35.0 ° ...
*May 29, 2012*

**Math**

you're setting sales goals for next month, you base your goals on previous avg sales. The actual sales for the same month for the last 4 yrs have been 24 units, 30 units, and 27 units, what is the avg number of units you can expect to sell next month
*May 27, 2012*

**waves and optics**

Cherenkov radiation is light emitted by a particle moving through a medium with a speed greater than the speed of light in the medium. (Note: The speed of the particle is not greater than the speed of light in a vacuum.) Consider a beam of electrons passing through water with ...
*May 27, 2012*

**physics**

does this work as the same phenomenon as the moon ???
*May 27, 2012*

**physics**

A planet orbits a star once every 3.14x10^7 s in a nearly circular orbit of radius 1.51x10^11 m. (a) With respect to the star, determine the angular speed of the planet b) With respect to the star, determine the tangential speed of the planet. c) With respect to the star, ...
*May 25, 2012*

**english**

I wrote an essay because i'm apply to get into the honor's program. I'm supposed to write about who i was, who i am now, and who I would like to be. I would appreciate it if I got some feed back along with grammar correction. Is my essay even close to being okay or...
*May 22, 2012*

**math**

Find a quadratic function in standard form that has 3-1/4i as a zero and also passes through the point (1,-70).
*May 21, 2012*

**math**

39+(-88) -29 - (-83)=
*May 21, 2012*

**physics**

An electron ( mass = 9.11×10−31 kg) leaves one end of a TV picture tube with zero initial speed and travels in a straight line to the accelerating grid, which is 1.85 cm away. It reaches the grid with a speed of 2.95×10^6 m/s . (You can ignore the ...
*May 19, 2012*

**Physics**

A 1.07 kg block slides across a horizontal surface directly toward a massless spring with spring constant 4,794 N/m. The surface is frictionless except for a rough patch of length 0.461 m that has coefficient of kinetic friction 0.358. The initial velocity of the block is 4.12...
*May 14, 2012*

**child care management**

A teaching method that uses computers to help children learn is called ?
*May 12, 2012*

**Math 117**

What is the lcm 6y^2 and 12y^9
*May 7, 2012*

**Math 117**

What is the lcm 6y^2 and 12y^9
*May 7, 2012*

**math**

A sample of 64 statistics students at a small college had a mean mathematics ACT score of 28 with a standard deviation of 4. Estimate the mean mathematics ACT score for all statistics students at this college. Give the 95% confidence interval.
*May 6, 2012*

**math**

A government survey conducted to estimate the mean price of houses in a metropolitan area is designed to have a margin of error of $10,000. Pilot studies suggest that the population standard deviation is $70,000. Estimate the minimum sample size needed to estimate the ...
*May 6, 2012*

**math**

A researcher wishes to estimate the proportion of college students who cheat on exams. A poll of 490 college students showed that 33% of them had, or intended to, cheat on examinations. Find the margin of error for the 95% confidence interval.
*May 6, 2012*

**Utech**

The 6th term of an A.P is twice the third and the first term is 3. Find the common difference and the 10th term.
*May 1, 2012*

**Utech**

The 9th term of an Arithmetic Progression is 8 and the 4th term is 20. Find the first term and the common difference.
*May 1, 2012*

**math**

3 bags of soil
*May 1, 2012*

**math**

Charlene is filling a box planter with soil.Each bag of soil contains enough to fill 500 cubic inches.If the base of the box planter is a 9-inch square and the sides are 18 inches tall,how many bags of soil will Charlene need?
*May 1, 2012*

**Statistics**

When fifteen vehicles were observed at random for their speeds (in M.P.H.) on a freeway, the following data were obtained. 61 53 57 55 62 58 60 54 62 60 59 66 55 54 63 Suppose that from past experience it may be assumed that vehicle speed is normally distributed with standard ...
*April 29, 2012*

**social studies**

anyone hello plzzzz!!!!!!!!! anyone out there plzzzz!!@!!!!!!!
*April 26, 2012*

**social studies**

plzzzzzzz!!!!!!!!!!!
*April 26, 2012*

**social studies**

i need help with homework plzzzzzzz!!!!!!!!!!!!
*April 26, 2012*

**Math**

For $1.80 a grocer buys a case of fruit which contains 12 dozen. She knows that tow dozen will spoil before she sells them. At what price per dozen must she sell the good ones to gain 1/3 of the whole cost?
*April 25, 2012*

**Math**

In printing an article of 30,000 words, aprinter decided to use two sized of type. Using the larger type, a printed page contains 1,200 words. Using the smaller type, a page contains 1,500 words. The article is allotted 22 pages in a magazine. How many pages must be in the ...
*April 25, 2012*

**Math**

Three individuals form a partnership and agree to divide the profits equally. X invests $4,500, Y invests $3,500 and Z invests $2,000. If the profits are $1,500, how much less does X receive than if the profits were divided in proportion to the amount invested?
*April 25, 2012*

**Math**

Our baseball team lost 9 games this season. This is 3/8 of all they played. How many games did they play this season?
*April 25, 2012*

**Math**

Answers for A clock was exactly on time at noon on Monday. At 2 P.M. on Wednesday, it was 25 seconds slow. At that same rate, how much did it lose in 1/2 hour?
*April 25, 2012*

**math**

62.85
*April 19, 2012*

**algebra**

the weight of a symetry ball varies directly with the cube of it's radius a ball with the radius of 2 inches weighs 5.60. find the weight of a ball with a 3 inch radius
*April 18, 2012*

**Networking**

A firm is assigned the network part 128.171. It selects a 10-bit subnet part. a)Draw the bits for the four octets of the IP address of the first host on the first subnet. b)Convert this answer into dotted decimal notation. c)Draw the bits for the second host on the third ...
*April 18, 2012*

**Math**

a rectangle of integer dimensions is filed with 1x1 tiles. Each tile that touches the perimeter is colored red, while all the "interior" tiles are left white. Let R be the number of red tiles and W the number of whites tiles find R and W for a 3x10 rectangle find any...
*April 11, 2012*

**Algebra 2**

A photograph that is 4" by 6" is to be enlarged so that the width of the new photograph is 10". What is the length of the new photograph?
*April 6, 2012*

**math 102**

The outside dimensions of a piece of framework is 24 inches by 20 inches. The area of the picture is 320 square inches. Find the width of the frame itself
*April 1, 2012*

**Operations Management**

# 1 - Review the Capacity Tradeoffs section that begins on page 145 of the course text. # 2 - Review the information under the Capacity Planning in Services section on page 150 of the text. By reading the course materials, these answers should be readily available to you.
*April 1, 2012*

**math 102**

what number multiplied by the numerator and added to the denominator of the fraction 2/5 makes the resulting fraction 8/9?
*March 28, 2012*

**Algebra**

A rectangular pen for a pet is 5 feet longer than it is wide. Give possible width of the pen if its area must be 204 and 750 square feet, inclusively.
*March 26, 2012*

**math**

Which of the following situations cannot be represented by the integer 10? F a balloon rises 10 ft into the air G the stock market gains 10 points H the town lies 10 ft below sea level I Jon received a gift of $10
*March 25, 2012*

**math**

15/100 * $12 $ 1.8
*March 24, 2012*

**math**

x+3=57
*March 22, 2012*

**algebra**

can you check my answers please? What are the first three terms of the sequence: a1 = 3 and an = 2(an1)2? 2, 8, 18 3, 18, 648 --3, 32, 50 2, 6, 12, 24 What is the 14th term in the sequence: an = 4n + 13? -43 43 __> -69 69 What is the recursive rule for the sequence: −...
*March 22, 2012*

**Algebra 1**

if i have 550 students and there are 144 more boys than girls how many girls are in class
*March 15, 2012*

**Pre-calc**

use either substitution or elimination 4/x-3/y=0 4y=3x
*March 14, 2012*

**math**

282,000
*March 10, 2012*

**chemistry**

you cannot isolate X by its self without using the quadratic equation: x = -B +or- square-root(B^2 - 4AC) ------------------------------ 2A
*March 9, 2012*

**HCS/457**

Reviews two to three news articles Determines a local community health care issue. Paper answers following questions: How long has it been a problem? How has it affected the community? How has the community responded? Organization/Development The summary is 350 to 700 ...
*March 3, 2012*

**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*