Friday

January 20, 2017
Total # Posts: 179

**Physics**

A ball is thrown off a cliff that is 10 meters tall. The horizontal speed of the ball is 8 m/s. Assuming no air resistance, how far from the base of the cliff will the ball land?

*September 6, 2016*

**Logs**

Solve the equation and check your solutions. Note any extraneous answers. log(3x-13)=2 - log x

*April 26, 2016*

**Pre=Calc**

Use composition to show that the given functions are inverses (You must show both compositions). Help? g(x)=x^2+3/2

*April 26, 2016*

**Logarithm**

Determine the value of each logarithm a) Log(4)256 b) Log(2) 1/64 Thank you!

*April 23, 2016*

**Chemistry**

How much NACl do i need to dissolve in grams to make 0.9%solution of 0.25l saline

*April 1, 2016*

**Math**

Molly uses 192 beads to make a bracelet and a necklace.it takes 5 times as many beads to make a necklace than it does to make a bracelet .how many beads it takes to make the necklace ?

*March 9, 2016*

**Math**

Suppose F(G(x))=x^(2) and G′(1)=5. Find F′(G(1)). F′(G(1))= ___

*February 22, 2016*

**Maths**

A train travels from city A to city B. It leaves A at 11:15 AM and arrives at B at 2:20 PM. The distance between the cities is 123 miles. What was the average speed of the train in miles per hour (mph)? The average speed is ___ miles per hour.

*January 21, 2016*

**Physics**

a 4.50 kg mass traveling east at 5.0 m/s has a head-on elastic collision with a 1.5 kg mass traveling west at 3.0 m/s. find the velocity of each mass after the collision. my work so far: vif= (4.50-1.5/4.50 + 1.5) x2 v2f= (2m1/4.50+1.5) x 2 I don't get the right answer ...

*January 11, 2016*

**Science**

1:A 2:C 3:A 4:C I just took the test and got 100%

*May 9, 2015*

**Science**

It takes 3 Global Positioning Systems to get your pinpoint location. I just took the test its 3

*May 9, 2015*

**algebra**

75=m/3+10 27=-2Y+15

*February 24, 2015*

**Social Studies Please Check Answer**

is it c?

*February 4, 2015*

**Social Studies Please Check Answer**

d?

*February 4, 2015*

**Social Studies Please Check Answer**

b?

*February 4, 2015*

**Social Studies Please Check Answer**

where do most people in arabia and iraq live? a.in the fertile crescent b.in the rub' al-khali c.in cities d.in and around mecca a? b? or d?

*February 4, 2015*

**Seventh grade math**

110

*November 13, 2014*

**chemistry**

How many mililiters of 8.00 M HCL must be diluted to make 500. mL of a 0.500 M solution?

*November 10, 2014*

**Statistics**

Compute the critical value za/2 that corresponds to a 85% level of confidence.

*June 30, 2014*

**Statistics**

An investor has $1400 to invest, and his financial analyst recommends two types of junk bonds. The A bonds have a 6% annual yield with a default rate of 3%. The B bonds have a 9% annual yield with a default rate of 7%. (If the bond defaults, the $1400 is lost.) Which of the ...

*June 30, 2014*

**Statistics**

A statistics professor plans classes so carefully that the lengths of her classes are uniformly distributed between 50.0 and 52.0 minutes. Find the probability that a given class period runs between 50.25 and 50.5 minutes.

*June 30, 2014*

**Statistics**

Many states are carefully considering steps that would help them collect sales taxes on items purchased through the Internet. How many randomly selected sales transactions must be surveyed to determine the percentage that transpired over the Internet? Assume that we want to be...

*June 30, 2014*

**statistics**

A Gallup poll of 1236 adults showed that 12% of the respondents believe that it is bad luck to walk under a ladder. Consider the probability that among 30 randomly selected people from 1236 who were polled, there are at least 2 who have that belief. Given that the subjects ...

*June 30, 2014*

**Statistics**

Find the critical value za/2 that corresponds to the given confidence level. 96%

*June 30, 2014*

**Statistics**

Assume that a procedure yields a binomial distribution with a trial repeated n times. Use the binomial probability formula to find the probability of x successes given the probability p of success on a single trial. n=21, x=18, p=0.75

*June 30, 2014*

**Statistics**

The distribution of IQ scores is a nonstandard normal distribution with a mean of 100 and a standard deviation of 15. What are the value of the mean and standard deviation after all IQ score have been standardized by converting them to z scores?

*June 30, 2014*

**Statistics**

Find the critical values x2L and x2R that correspond to the given confidence level and sample size. 99%: n=23

*June 30, 2014*

**statistics**

Assume that a procedure yields a binomial distribution with a trial repeated n times. Use a binomial probabilities table to find the probability of x successes given the probability p of success on a given trial. n=8, x=2, p=0.30

*June 30, 2014*

**Statistics**

A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study 320 babies were born, and 256 of them were girls. Use the sample data to construct a 99% confidence interval estimate of the percentage of girls born. Based on the results, ...

*June 30, 2014*

**chemistry**

There are 149 molecules of Al2O3

*May 24, 2014*

**Math**

Selma went to the mall and spent 1/3 of her money. She then lost 1/2 of what she had left. She then had $6. How much money did Selma originally have?

*March 12, 2014*

**History**

Can someone help me with these 2 questions please? thanks!! :) 1. Why did President Madison veto a bill that supported government funding of internal improvements? (1 point) The Second Bank of the United States did not have enough money to pay for the improvements. Turnpike ...

*December 19, 2013*

**math**

A fruit stand has 28 apples, 20 oranges, and 12 pears. What is the ratio of apples to the total pieces of fruit? A. 1 : 4 B. 7 : 15 C. 1 : 2 D. 7 : 8

*December 3, 2013*

**Science!**

Please check my answers! thanks! :) 1. A population of oak trees growing in a region in Canada experiences a change in climate to much colder temperatures and much drier conditions than they have had for many decades. What determines how this population will change in the next...

*October 9, 2013*

**math**

Calculate the following, leaving your answer as a fraction (lowest) or in decimal form. 4(2+1)² -------- 3(1)²

*September 17, 2013*

**math**

Calculate the following, leaving your answer as a fraction (lowest) or in decimal form. Show work. 8(2+3)² ------- 2(5)²

*September 17, 2013*

**math**

Calculate the following, leaving your answer as a fraction (lowest) or in decimal form. Show work. b) 3(12+2+1) ---------- = 3(4 + 1)

*September 17, 2013*

**math**

Calculate the following, leaving your answer as a fraction (lowest) or in decimal form. Show work. a) 2(5+3+2) -------- 2(2+3)

*September 17, 2013*

**Physics**

Nicole throws a ball straight up. Chad watches the ball from a window 5.0m above the point where Nicole released it. The ball passes Chad on the way up, and it has a speed of 10m/s as it passes him on the way back down. How fast did Nicole throw the ball?

*September 17, 2013*

**math**

9000 equal 900 times

*August 27, 2013*

**Physics**

Standing side by side, you and a friend step off a bridge at different times and fall for 1.41 s to the water below. Your friend goes first, and you follow after she has dropped a distance of 1.93 m. (a)How long does it take your friend to fall 1.93 m? (b)What is the ...

*August 27, 2013*

**Math Help**

Hope this helped, God bless and have a wonderful day:) Loves!

*October 24, 2012*

**Math Help**

Kid you need to do your homework. I do my lessons and take my test. The answers I miss I research. I go to Connections academy and have been following your posts for some time. I know who you are. Now if you can't figure theses out do the lesson again. If you post one more...

*October 24, 2012*

**Physics**

A gull is flying horizontally 8.17 m above the ground at 6.35 m/s. The bird is carrying a clam in its beak and plans to crack the clamshell by dropping it on some rocks below. Ignoring air resistance, what is the horizontal distance to the rocks at the moment that the gull ...

*September 22, 2012*

**Chemistry**

To identify a diatomic gas (X2), a researcher carried out the following experiment: She weighed an empty 2.7L bulb, then filled it with the gas at 1.30 atm and 30.0 C and weighed it again. The difference in mass was 3.9 g. Identify the gas. I used Pv=nRT to get the moles, but ...

*July 1, 2012*

**Physics**

An old trick to find out if a train is coming is to put your ear on the rails of the track. Why is this more effective than just listening for the sounds the train makes in air?

*June 16, 2012*

**Algebra I**

Write an equation based on the given facts and find the solution. Show all your work, including the steps for solving the equation and checking your answer. –2 times a number plus 12 is –110. Find the number.

*May 31, 2012*

**analysis**

What is meant by the sample space for a random experiment?

*May 17, 2012*

**math**

Using the letters in ADJUSTING without repeats, How many different nine letter arrangements could be made? How many of these nine-letter arrangements have a consonant in fifth position and J in sixth position? What special name is given to the sixth position in the last ...

*May 17, 2012*

**math**

An arithmetic series has a first term 8 and third term 20. What does the fifth term equal? What does the second partial sum equal?

*April 29, 2012*

**math**

Write this repeating decimal as a ratio of relatively prime integers: 0.324324324...

*April 21, 2012*

**physics**

A spring with a spring constant of 1.33 102 N/m is attached to a 1.6 kg mass and then set in motion. (a) What is the period of the mass-spring system? (b) What is the frequency of the vibration?

*February 22, 2012*

**physics**

Find the length of a pendulum that oscillates with a frequency of 0.19 Hz

*February 22, 2012*

**physics**

A child swings on a playground swing. How many times does the child swing through the swing's equilibrium position during the course of 3 period(s) of motion

*February 22, 2012*

**physics**

In preparing to shoot an arrow, an archer pulls a bowstring back 0.37 m by exerting a force that increases uniformly from 0 to 246 N. What is the equivalent spring constant of the bow?

*February 22, 2012*

**Math**

ok I am a fraction.Iam greater than 1/5 and less than 1/3.My numerator is a on.What fraction am i?

*February 17, 2012*

**Psychology**

Kara heard the noise, but could not understand what was being said. Perhaps it was simply the humming of the machines that she heard? She was uncertain whether she should move toward or away from the sound. Kara is having difficulty with: a. sensation. b. perception. c. ...

*November 7, 2011*

**Psychology**

Sound that impinges on the inner ear and the auditory nerve arrives as a fairly meaningless stimulus. At this point, it should be viewed as: a. perception. b. sensation. c. an auditory stimulus item. d. free of environmental noise. I think it is either a or b. I know that ...

*November 7, 2011*

**Psychology**

In a classroom experiment, students were asked to place one paper clip in each hand. They were then instructed to add paper clips to the left hand until they were certain that the clips in the left hand weighed more than the paper clips in the right hand. The class average was...

*November 7, 2011*

**Psychology**

As a scientist, Carl is concerned with the intensity of lights in the modern human environment. In his research project, Group A consists of volunteers who have agreed to sleep each night for a week with a 150 watt light bulb hanging over their bed. Group B will sleep in total...

*November 7, 2011*

**Psychology**

I think it is probably b and not c or d.

*November 7, 2011*

**Psychology**

Avis put off writing her term paper until three days before it was due. "It's not that big of a deal. I can whip it out in a couple of hours," she thought. As it turned out, this was not the case. She averaged two-hours-a-night sleep as she struggled to write the...

*November 7, 2011*

**Psychology**

Optimum physical health usually occurs: a. between the ages of 15 and 21. b. between the ages of 18 and 25. c. between the ages of 25 and 40. d. between the ages of 40 and 55. I think it is either c or d.

*November 7, 2011*

**Psychology**

Danette knows she is not at all like her parents. She could never be like them. She is her own unique person. Her style of dress, mannerisms, and language emphasize her uniqueness. According to Erikson, Danette is attempting to establish: a. permanence. b. generativity. c. ...

*November 7, 2011*

**Psychologist**

Maurine is a social drinker, drinking only occasionally during weekend parties with her friends. When she found out that she was pregnant, she: a. stopped all drinking because she knew that even a small amount of alcohol could harm the developing baby. b. restricted her ...

*November 7, 2011*

**Psychology**

After I reread my book I agree with you that it is c.

*November 6, 2011*

**Psychology**

Dr. Lange is a developmental psychologist. He specializes in cognitive development during the period of infancy. Like most psychologists who focus on specific periods of development, his studies: a. emphasize the chemical changes in the synaptic gap. b. study the credibility ...

*November 6, 2011*

**Psychology**

Dr. Gillian explained that research has identified over 25,000 genes that are responsible for the genetic information that progresses from generation to generation. These genes are: a. telomeres which cap the chromosome. b. located in a specific order along the axon of the ...

*November 6, 2011*

**Psychology**

According to the all-or-none law: a. all axons in an area will fight at a given signal. b. an axon moves from its resting state with various degrees of stimulation. c. only sufficient electrical activity will cause the axon to fire. d. there is a gradual buildup of electrical ...

*November 6, 2011*

**Psychology**

The morning was frigid and the roads covered with ice. As Paula drove to work, she was cautious, especially in less-traveled areas. When she entered the main highway, the situation was worse than she expected. As she passed a truck that had slid off the road, another vehicle ...

*November 6, 2011*

**Psychology**

The neurobiologist explained to the students, "The neural system is very much like the wires connecting your TV and stereo to the electrical outlet. If the wires were not covered with insulation, the signal would short circuit." The neurobiologist was describing the ...

*November 6, 2011*

**c++ program**

how can a modfiy this source code to a menu. #include <stdio.h> #include <stdlib.h> #include <time.h> main() { char cYesNo = '\0'; int iResp1 = 0; int iResp2 = 0; int iResp3 = 0; int iElaspedTime = 0; int iCurrentTime = 0; int iRandomNum = 0; int i1...

*October 24, 2011*

**c++ program**

will this work for a source code that receive and total collection of payroll amounts entered at the terminal until 999 is reached. #include <stdio.h> #include <stdlib.h> main() { int num = 0; printf("Enter number (-999 to quit:"); scanf("%d" ,&...

*October 21, 2011*

**C++ program**

Please help am not very good at c program. Am supposed to create a source code that will display to the screen the first 20 numbers with their squares and cubes.

*October 19, 2011*

**C++ program**

Create a source code that will prompt for recive and total a collection of payroll amounts entered at the terminal untill a sentinel amount of 999 is entered. Here is what i have so far i know not much but am not that great at this class. #include <stdio.h> #include <...

*October 19, 2011*

**C++ program**

Create a source code that will prompt for recive and total a collection of payroll amounts entered at the terminal untill a sentinel amount of 999 is entered. Here is what i have so far i know not much but am not that great at this class. #include <stdio.h> #include <...

*October 19, 2011*

**chemistry**

What ratio [CH3NH3+]/[CH3NH2] is needed to prepare a buffer solution with a pH of 8.60 from methylamine, CH3NH2, and methylammonium chloride, CH3NH3Cl? Kb of CH3NH2 = 3.7e-4.

*October 6, 2011*

**Chemistry**

Suppose that 50 mL of 0.3 M LiOH and 60 mL of 0.1 M NaHSO3 are mixed. What is the K for the dominant equilibrium in terms of Ka's, Kb's, Kw etc.? Ka of HSO3- 1/Ka of HSO3- Kb of OH- 1/Kb of OH- Kb of SO3-2 1/Kb of SO3-2 Kw 1/Kw There is no reaction.

*October 6, 2011*

**Business Communication**

I think the correct answer is either b or d but I am more sure it is b.

*September 27, 2011*

**Business Communication**

Indicate the alternative that both correctly evaluates the following sentence and correctly explains the reason for the evaluation. "As soon as you provide your date of birth on Line 2, your application for a flexible spending account will be processed." a. Good ...

*September 27, 2011*

**Business Communication**

Would it be b because if the person is talking to a customer the customer might disagree with whoever told him or her about the layaway plan will enable him or her?

*September 27, 2011*

**Business Communication**

I think the correct answer is a.

*September 27, 2011*

**Business Communication**

Which of the following would be the LEAST appropriate in the closing paragraph of a negative message? a. "Let us know if model #A01 would be a suitable substitution." b. "Our layaway plan will enable you to purchase all the clothes the children need for school.&...

*September 27, 2011*

**Business Communication**

From my text materials I understood that d is the correct answer.

*September 27, 2011*

**Business Communication**

Which of the following statements explains why threats are NOT effective for motivating people? a. Threats reduce tension. b. Threats ensure that appropriate actions are not abandoned. c. Threats produce permanent change. d. Threats provoke counteraggression.

*September 27, 2011*

**Business Communication**

My understanding from my text materials is that I think the correct answer is b.

*September 27, 2011*

**Business Communication**

I think the answer is d.

*September 27, 2011*

**Business Communication**

As a professor at State University, you have been asked to write a letter of recommendation for one of your advisees who is applying for an internship. The student is now a senior and you have known her since she was a freshman. She has taken two courses from you, and she'...

*September 27, 2011*

**Business Communication**

I will put down my response of what I think is the correct answer on other questions when I ask for help.

*September 27, 2011*

**Business Communication**

I have read my study materials. I am just confused on some questions.

*September 27, 2011*

**Business Communication**

I agree with you too. I was not sure if it would be a or d.

*September 27, 2011*

**Business Communication**

As a professor at State University, you have been asked to write a letter of recommendation for one of your advisees who is applying for an internship. The student is now a senior and you have known her since she was a freshman. She has taken two courses from you, and she'...

*September 27, 2011*

**Business Communication**

I think it is c.

*September 27, 2011*

**Business Communication**

In which of the following situations would it be BEST to recast the situation as a positive message? a. When you want to maintain goodwill with the reader, because you still have to deal with each other b. When there really is not a reason for the refusal c. When you can offer...

*September 27, 2011*

**Business Communication**

I think it would be a.

*September 27, 2011*

**Business Communication**

Crystal agreed to serve on a company's advisory board and now has to contact them to say she cannot attend a scheduled meeting where she was to be one of several key speakers. What should she do? a. Let the company know she cannot attend and that they will have to make ...

*September 27, 2011*

**Business Communication**

I am pretty sure it is c but I am not sure if it would be a or c.

*September 27, 2011*

**Business Communication**

Which sentence presents an alternative in appropriate way? a. "The 11 a.m. flight is completely sold out, so I booked you on the 2 p.m. flight. Hopefully that will work for you." b. "We are out of the red units, so we went ahead and shipped you 12 green ones ...

*September 27, 2011*

**Business Communication**

I think it might be b.

*September 27, 2011*

**Business Communication**

I think it is either a or c.

*September 27, 2011*