Tuesday

October 13, 2015
Total # Posts: 111

**math please help!!**

Thank you so, so much!
*October 8, 2015*

**math please help!!**

For what values of x is the graph of y = 8e^−x^2 concave down? (Enter your answer using interval notation.) I started by finding the second derivative and factoring and ended up getting 16e^-x^2 (2x^2-1) and I know up till this part that I'm doing the right thing. ...
*October 8, 2015*

**Math**

How do you explaint to a 2nd grader how to find 2/3 minus 1/4?
*March 25, 2015*

**accounting**

The following was taken from the records of Smith Company in the year ending December 31, 2014. Journalize the following transactions in an Excel spreadsheet for year-end 2014 using the aging method. Assume that the allowance for doubtful accounts has a beginning credit ...
*February 13, 2015*

**science**

what is the centripetal of a 50.5-kg object traveling 25 m/s around a circular track with a radius of 10.0 m?
*January 26, 2015*

**JEMS**

Dennis wrote down a three digit number, The digit in the tens place is 2 more than the digit in the hundreds place. The digit in the ones place is 6less than the digit in the tens place. The digit in the hundreds place is odd number. What is the three digit number?
*June 26, 2014*

**English**

When starting your search for peer reviewed scholarly sources, which of the following types of databases is your best choice?
*January 25, 2014*

**statistics**

P(z < -1.5 or z > 2.50) =
*September 7, 2013*

**Statistics**

tickets for movies are usually one price right? im thinking the tickets are more beneficial bc you don't know what the person wants to eat and how much of it. this is an extra credit question
*August 31, 2013*

**Statistics**

Going to the movies tonight with one friend. Is it more beneficial for me to pay for the tickets or food? Please explain your reasoning
*August 31, 2013*

**Physics**

a.37.4m/s b.5 s
*February 13, 2013*

**Physics**

1. Suspend the meter stick by a string from its center. 2. Notice carefully where it balances. It probably will not balance exactly at 50 cm. All distances must be measured to this point (called the fulcrum). 3. Hang a 200 g mass on one side and a 50 g mass on the other and ...
*January 2, 2013*

**Physics**

1. Suspend the meter stick by a string from its center. 2. Notice carefully where it balances. It probably will not balance exactly at 50 cm. All distances must be measured to this point (called the fulcrum). 3. Hang a 200 g mass on one side and a 50 g mass on the other and ...
*January 1, 2013*

**Psychopharmocolgy**

Compare and contrast useage patterns and therapeutic uses of marijuana and hallucinogenic drugs
*December 10, 2012*

**Chemistry**

What is the final concentration of Sucrose if 150 ml of a 1.2 M solution of Sucrose is diluted to a total volume of 0.60 L?
*November 3, 2012*

**Algebra; Help immediately.**

Uh..so what's the answer? I don't understand..
*May 24, 2012*

**Algebra; Help immediately.**

The height of a ball that was batted into the air at 160 feet per second is a function of t, the time in seconds after the ball was hit. The height is determined by subtracting 16 times the square of t from 160 times t. Which equation can be used to find t when the ball is 400...
*May 24, 2012*

**Simple Interest**

The Johnsons have saved $45,000. They invest their money in a bank and thei account earns 7.5% interest. How many years will it take to earn $74,000? *PLEASE PROVIDE AN EXPLANATION*
*April 9, 2012*

**Physics**

A 185kg refrigerator is loaded into a van by moving it up a 10.0m long frictionless ramp that is at an angle of 11.0 degrees. How much work is done?
*April 1, 2012*

**physics**

A rope of negligible mass pulls a 38-kg block block vertically upward with a constant acceleration of 6.0 meters per second squared. What is the tension of the rope?
*January 4, 2012*

**Psychology**

Is my answer correct I said the correct answer is D Regarding cultural differences in self-esteem, which of the following statements is/are TRUE? a. People from Eastern cultures are more likely to engage in self-criticism. b. The self-esteem for people from Eastern cultures is...
*November 22, 2011*

**Psychology**

Can someone please tell me whether or not these answers are correct. Thanks! 1. Regarding the memory processes, incoming information is first _______, then stored, and finally the memories must be _______, or taken out of storage to be useful. a. retrieved; encoded b. encoded...
*November 19, 2011*

**psychology**

I need help with this! A recent controversy in the media surrounded the complaints of serious physical symptoms in veterans returning from the 1991 Gulf War. Allegations that the physical symptoms were due to exposure to chemical or biological agents could not be fully ...
*November 18, 2011*

**psychology**

Can someone please help me with this psychology question asap? Describe how you might design a community health campaign. In your description, consider both risky behaviors and health promoting behaviors. I really need help with this. Thanks!
*November 18, 2011*

**psychology**

Describe how you might design a community health campaign. In your description, consider both risky behaviors and health promoting behaviors. I really need help with this. Can someone please help me with this, because I have no idea of what to do. Thanks!
*November 18, 2011*

**psychology**

Yes, I really need help with this assignment.
*November 18, 2011*

**psychology**

Describe how you might design a community health campaign. In your description, consider both risky behaviors and health promoting behaviors. I really need help with this. Thanks!
*November 18, 2011*

**chemistry**

caculation: 2Na3PO4(aq)+3BaCl2(aq)-> 6NaCl(aq)+Ba3(PO4)2(s) a)determine the maximum g of Ba3(PO4)2 that can be formed from your mass of Na3PO4x12H2O b)determine the maximum gram of Ba(PO4)2 that can be formed from your mass of BaClx2H2O
*October 11, 2011*

**computer science**

For part a) I have this but is not compiling! What is wrong with this? #include <iostream> #include <string> using namespace std; int X = "100"; const string a; "A"; const float C; "98.6"; int main() { cout << "The sets of ...
*September 27, 2011*

**computer science**

Write a declarations and input statements necessary to read each of the following sets of data values into variables of the appropiate types. You choose the names of the variables. In some cases, punctuation marks or special symbol must be skipped. a. 100 A 98.6 b. February 23...
*September 27, 2011*

**engineering**

A cylinder has 500 cm^3 of water. after a mass of 100 grams of sand is poured into the cylinder and all air bubbles are removed by a vacuum pump, the water level rises to 537.5 cm^3. Determine the specific gravity of the sand?
*September 21, 2011*

**Algebra**

y = -4 find the y coordinates of the points (-1) (2) and (-3)
*July 28, 2011*

**math**

4% of what = $3,000.00
*July 17, 2011*

**English grammar**

@ Dick: You didn't capitalize anything that should be capitalized (except "America") and didn't put a question mark after "illiterate," so maybe you shouldn't be making fun of their questions. They are taking ONLINE courses so, of course, the ...
*July 5, 2011*

**algebra2**

[x^9]^11/7
*May 17, 2011*

**math**

the cost per ounce is 0.18 the cost per pound is 2.89 ♥ ☺ ♠ ♣ ○ ◘ •
*April 28, 2011*

**nurse entrance test**

After deducting 16 and 2/3 percent the price of a blouse is $35.00. The list price is what? Is it 42.00 for the list price?
*April 18, 2011*

**Math**

you take 2.60 and take away the decimal pint to make it 260 then you divide 260 by 20 then put the decimal point in the answer as many spaces were in the original number XD so it looks like 260/20=13 then it becomes 0.13
*April 13, 2011*

**chemistry**

How would you make a 1.0 L of 0.10M NaOH solution of 10.0M NaOH?
*April 6, 2011*

**chemistry**

A student needs to make a dilution from a stock solution. The stock solution is 2.) M NaCl. How much should the student use of the 2.0 M NaCl to make 1.0 L of 0.05M NaCl diluted stock.
*April 6, 2011*

**chemistry**

Calculate the molarity of a solution prepared by dissolving 25.0 g NaCl in 1.0 L solution.
*April 6, 2011*

**chemistry**

Calculate the molarity of a solution by dissolving 40.0 g NaOH in 1.5 L solution.
*April 6, 2011*

**geometry**

what is the area of a rectangle thats 15 feet long and 20 feet wide
*March 29, 2011*

**6th grade math**

i found out it was 24 miles per gallon and divided 216 and 24 then multiplied the answer by 24 and i got (216/24)=(9 x 24)= 216 so the mathematical answer is 9
*March 24, 2011*

**math**

How do I determine which piece of fabric is the longest (2 3/4 yards of mink), 6 feet of silk), or (108 inches of Velvet)
*March 15, 2011*

**Math**

What operation is used to change a fraction in simplest form to an equivalent fraction? What operation is used to change a fraction to simplest form?
*March 15, 2011*

**statistics**

how to do histogram and relative- frequency histogram using the #s 1,5,5,6,7,4,8,7,6,5,5,6,7,6,6,5,8,9,9, 10,7,8,11,2,4,6,5,12,13,6,3,7,8,8,9,9,10,9,8,9 with five classes
*September 5, 2010*

**statistics**

In the July 29, 2001, issue of The Journal News (Hamilton, Ohio) Lynn Elber of the Associated Press reported on a study conducted by the Kaiser Family Foundation regarding parents’ use of television set V-chips for controlling their children’s TV viewing. The study ...
*July 26, 2010*

**english**

How do I write 5 sentenses about the role of education in successful financial planning using a different verb tese in each sentence. Past,present, future, progressive, and perfect.
*June 4, 2010*

**english**

Hoe do I write 5 sntenes that show what role education plays in financial sucess. I must have one with past, present, future, progressive, and perfect tenses.
*June 4, 2010*

**How Children learn**

16C 19C 20A
*May 13, 2010*

**earth science**

which type of mountyain is found on island arcs?
*April 30, 2010*

**algebra I**

determine which real number corresponds to the situation. The record high temperature for a date is 97.9 degrees above 0. what is the corresponding number for this sentence?
*April 18, 2010*

**algebra**

64/35
*April 18, 2010*

**algebra**

8/5 * -8/7)= how do you solve? multiply 8*8=64 and 5*7?
*April 18, 2010*

**algebra I**

determine the minimum furnance output,b solve for a, that is solve b=27a with 2100 ft square flooring.
*April 17, 2010*

**Math 350..help!**

If the question says use the formal definition of a derivative aren't I supposed to use f(x)=f(x+h)-f(x)/h?
*October 20, 2009*

**Math 350..help!**

I'm using the formula for instantaneous rate of change, but I'm getting -38.4 as my answer..what am I doing wrong? 560-1240+1086-230-560-1240+1086-230/20 -2480+2172-460/20
*October 20, 2009*

**Math 350..help!**

How would I start this? The amount that workers contribute monthly for health insurance premiums can be modeled by A(t)=0.07t^3-3.1t^2+54.3t-230, where A is the monthly amount contributed and t is the number of years after 1980. Find the instaneous rate of change in monthly ...
*October 20, 2009*

**Calculus**

How would i start this problem? The amount that workers contribute monthly for health care insurance premiums can be modeled by A(t)=0.07t^3-3.1t^2 + 54.3t-230, where A is the monthly amount contributed and t is the number of years after 1980. Find the instantaneous rate of ...
*October 19, 2009*

**Micro Econ**

Historically, officials from 15 NE colleges with selective admissions policies and high tuition met each spring to compare financial aid packages for more than 10,000 common applicants. These meetings were designed to eliminate any differences in the financial aid packages ...
*July 16, 2009*

**Micro Econ**

Historically, officials from 15 NE colleges with selective admissions policies and high tuition met each spring to compare financial aid packages for more than 10,000 common applicants. These meetings were designed to eliminate any differences in the financial aid packages ...
*July 15, 2009*

**Microeconomics**

If a monopoly is producing at an output where its average total cost of production is minimized and equals $50 per unit and marginal revenue equals $60, is the monopoly producing at the profit-maximizing output level? Explain why or why not.
*July 7, 2009*

**micro economics**

Explained well, thanks.
*June 29, 2009*

**micro economics**

Why are the firms in the perfectly competitve markets unable to control the prices of the goods that they produce?
*June 29, 2009*

**discussion question**

how can a people distinguish between the prejudical and nonprejudicial
*June 25, 2009*

**Science**

What factors might cause my contribution of carbon dioxide emissions to deviate substantially from the US national average of approximately 20 tons? I used CO2 emissions from electricity, natural gas, my car, waste (& reducing by recycling), and taking a short airplane trip ...
*April 17, 2009*

**math - pre algeabra**

write the verbal description as a portion 5is to x as 2 is to 3
*November 23, 2008*

**Statistic**

A restaurant that bills its house account monthly is concerned that the average monthly bill exceeds $200 per account. A random sample of twelve accounts is selected, resulting in the sample mean of $220 and a sample standard deviation of $12. The researchers have determined ...
*October 20, 2008*

**Statistic**

Your company wants to conduct a salary survey for the position of Accounting Assistant II. The estimated salary range is $4,500, the margin of error should be $100 and the desired level of confidence is 95%. What is the optimal sample size for this salary survey?
*October 20, 2008*

**Statistics**

From her firm’s computer telephone log, an executive found that the mean length of 64 telephone calls during July was 4.48 minutes with a standard deviation of 5.87 minutes. She vowed to make an effort to reduce the length of calls. The August phone log showed 48 ...
*October 3, 2008*

**Statistics**

Find the sample proportions and test statistic for equal proportions. Is the decision close? Find the p-value. a. Dissatisfied workers in two companies: x1 = 40, n1 = 100, x2 = 30, n2 = 100, á = .05, two tailed test. b. Rooms rented at least a week in advance at two ...
*October 3, 2008*

**Word Problem**

The Web-based company Oh Baby! Gifts has a goal of processing 95 percent of its orders on the same day they are received. If 485 out of the next 500 orders are processed on the same day, would this prove that they are exceeding their goal, using á = .025?
*September 28, 2008*

**Word Problem**

A coin was flipped 60 times and came up heads 38 times. (a) At the .10 level of significance, is the coin biased toward heads? Show your decision rule and calculations. (b) Calculate a p-value and interpret it.
*September 28, 2008*

**Word Problem**

Faced with rising fax costs, a firm issued a guideline that transmissions of 10 pages or more should be sent by 2-day mail instead. Exceptions are allowed, but they want the average to be 10 or below. The firm examined 35 randomly chosen fax transmissions during the next year...
*September 28, 2008*

**Word Problem**

The mean arrival rate of flights at O’Hare Airport in marginal weather is 195 flights per hour with a historical standard deviation of 13 flights. To increase arrivals, a new air traffic control procedure is implemented. In the next 30 days of marginal weather the mean ...
*September 28, 2008*

**Word Problem**

As a sample size approaches infinity, how does the student’s t distribution compare to the normal z distribution?
*September 6, 2008*

**Word Problem**

Given a normally distributed population, find a 95% confidence interval for the population mean; sample mean is 119; sample std deviation is 14; sample size is 28
*September 6, 2008*

**Word Problem**

Suppose a frequency table consists of six categories. If all six categories contain the same number of observations, the interior angles of each section of the associated pie chart would be
*September 3, 2008*

**Math**

If the size of a population is N and the size of a sample of the same population is n, then the correct relationship between N and n is
*September 3, 2008*

**Math**

Under what situation would one or more solutions of a rational equation be unacceptable?
*August 7, 2008*

**Math**

___E____ for r I= R + r
*August 5, 2008*

**math**

5 3 ____ + ______= 2 x – 1 7X – 7 3
*August 5, 2008*

**Math**

﴾ 3a^2b^3 ﴿^4__________ 5c^2
*August 5, 2008*

**Math**

Factor the following completely x^4 – 625
*August 4, 2008*

**Math**

(x + 3)(x^2 – 2x + 7)
*August 4, 2008*

**Math**

(3x^2 +5x) - (2x^2 – 3x +2)
*August 4, 2008*

**Math**

(-27x۸9)۸¨÷
*August 1, 2008*

**Math**

√2t۸5 •√10t۸4
*July 31, 2008*

**Math**

(3-2ã7)(3+2ã7)
*July 31, 2008*

**Math**

Solve each question xˉ² = 4
*July 31, 2008*

**Math**

Find all real or imaginary solutins to each equation. 3y(2)+4v-1=0
*July 31, 2008*

**Math**

Find the vertex and intercepts for each parabola. Sketch the graph. g(x)=x(2)+x-6
*July 31, 2008*

**Algebra**

Find the vertex and intercepts for each parabola. Sketch the graph. g(x) = x² + x - 6
*July 31, 2008*

**Math**

Find all real or imaginary solutions to each equation. Use the method of your choice. 3y² + 4v – 1 = 0
*July 30, 2008*

**math**

Solve each equation xˉ² = 4
*July 30, 2008*

**Math**

2y² - 3y – 6 = 0
*July 30, 2008*

**Math**

(x – 10)(x – 2) = -20
*July 30, 2008*

**math**

ww-1(3w+6) - w-1(3) = w-1(w+2)
*July 27, 2008*

**math**

Solve each equation 4w _ 1 _ w – 1 ‗ w - 1 3w + 6 3 w +2
*July 27, 2008*