Saturday

July 26, 2014

July 26, 2014

Total # Posts: 81

**physics**

rex stands 3m away from a concave mirror.his hieght is 1.70m. If the image formed on the screen is 12cm from the mirror,what is the size of the image

**Maths**

how do you find the hypotenuse of a triangle

**statistics**

Needing help to get this answer right. _c___ 3. What is the relationship between the alpha level, the size of the critical region, and the risk of a Type I error? a. As the alpha level increases, the size of the critical region increases and the risk of a Type I error increase...

**statistics**

Needing some help to clarify this problem and help finding the right answer. _b___ 2. Which of the following accurately describes the critical region? a. outcomes with a very low probability if the null hypothesis is true b. outcomes with a high probability if the null hypothe...

**statistics**

A sample of n = 25 scores has M = 20 and s2 = 9. What is the sample standard deviation? a. 3 b. 4.5 c. 9 d. 81

**statistics**

In a population of N = 10 scores, the smallest score is X = 8 and the largest score is X = 20. Using the concept of real limits, what is the range for this population? a. 11 b. 12 c. 13 d. cannot be determined without more information

**Statistics**

A researcher measures eye color for a sample of n = 50 people. Which measure of central tendency would be appropriate to summarize the measurements? a. mean b. median c. mode d. any of the three measures could be used

**Statistics**

For a negatively skewed distribution with a mode of X = 25 and a median of 20, the mean is probably ____. a. greater than 25 b. less than 20 c. between 20 and 25 d. cannot be determined from the information given

**Statistics**

One item on a questionnaire asks, "How many siblings (brothers and sisters) did you have when you were a child?" A researcher computes the mean, the median, and the mode for a set of n = 50 responses to this question. Which of the following statements accurately desc...

**s**

Thank you both for helping with this. I'm so glad that you all are here.

**s**

In a correlational study a. 1 variable is measured and 2 groups are compared b. 2 variables are measured and 2 groups are compared c. 1 variable is measured and there is only 1 group of participants d. 2 variables are measured and there is only 1 group of participants

**Statistics**

Can someone please help with this problem to advise how to set up and in the book Essential of Statistics for the Behavioral Sciences. A researcher is investigating the effectiveness of a new study-skills training program for elementary school children. A sample of n=25 third-...

**Statistics**

If the alpha level is changed from a=.05 to a=.01. a. What happens to the boundaries for the critical region? b. What happens to the probability of a Type I error?

**Statistics**

True or False In most research situations, the goal of a hypothesis test is to reject the null hypothesis.

**Statistics**

True or False The null hypothesis is stated in terms of the population, even though the data come from a sample.

**Statistics**

By definition, a Type I error is ____. a. rejecting a false H1 b. rejecting a false H0 c. rejecting a true H0 d. rejecting a true H1

**Physics**

B_0 in both cases seem difficult cannot get it, please help!

**English**

i need help with the same question

**algebra**

The model t=100+12 x represents the cost, in dollars of renting a car, where x is the number of days the car rented. What’s the total rental cost if one rents the car for 5 days.

**math**

I bought 16.8 gallons of gas at a cost of $61.47. Estimate the unit price(cost per gallon)

**Algebra with applications**

A poll was taken of 100 students at a commuter campus to find out how they got to campus. The results were as follows: 23 said they drove alone. 30 rode in a carpool. 31 rode public transportation. 4 used both carpools and public transportation. 3 used both a carpool and somet...

**Physics **

A crate is initially at rest on a rough, horizontal floor. The crate moves in a straight line as it is pushed resulting in the crate speeding up at a constant rate of 3.89 m/s2. After a while, the crate is no longer being pushed and the crate slows down at a constant rate of 5...

**Math**

Sally dilivered 148 newspapers and recieved $0.03 per paper. What were her earnings?

**physical chemistry**

2 liters of N2 at 0 degree Celsius and 5 atm pressure are expanded isothermally against a constant pressure of 1 atm until the pressure of the gas is also 1 atm. Assuming the gas to be ideal, what are the values of work,delta E, delta H, and q for the process?

**physial chemistry**

a weight of 1000g falls freely to a platform from a height of 10 meters. What amount of heat will be evolved when the weight strikes the platform?

**physical chemistry**

piston whose area is 60 cm2 moves through a distance of 20 cm against a pressure of 3 atm. calculate the work done in joules and calories

**Math**

Larry has an annual return of $213.00 from $3000.00 invested at simple interest. One at 5% and the other at 8%. How much is invested at each rate. (Hint, Interest earned = amount invested x rate of interest.)

**algebra**

2ax+6bx+ay+3by-az-3bz

**finance**

Assume investors expect a 2.0% real rate of return over the next year. If inflation is expected to be 5.0%, what is the expected nominal rate dor one year US Treasury security?

**math**

YEH! 803.244.9672. you can call me

**math**

sorry.

**Boys**

guys are trouble. im staying single till im 19. she shoult do the same.

**world history**

Ms. Sue is correct. It is easy to do this yourself. All you need to know that with B.C.E. dates, the higher dates come before the lower dates. For example, 5th century B.C.E. is an earlir date than 3rd Century B.C.E.

**poetry**

It is about the author's imminent death and about all the things that he would have liked to achieve but never did.

**health**

The answer is B.

**math**

find the solution of (x2-y2)dx + 3xydy =0 Please help me to find the right answer,I sovled many ways but I don't get the right one with answer key. Thank you so much in advance

**5th grade math**

Ms. Sue is correct. All you do is multiply the number of boys by 2 and you have your answer.

**Englsih due at 10:30**

One of the secrets for proofreading any document is to read the sentences out loud. You will pick up many grammatical errors this way.

**math**

An empty glass jar weighing 1.54 kg is in the shape of a cylinder which has a radius of 14cm and a height of 20cm. Calculate how many litres of water it will hold when filled to the top.Also calculate its weight when it is filled with water (take pie=22/7)

**business**

A company has the following alternatives on some real estate that it needs for its new plant. It can lease the facility for $10,000 a month for 15 years, or it can buy the facility now for $800,000. The company’s weighted average cost of capital is 12% and payments are ma...

**Algebra**

Thank you very much, I was beyond stumped.

**Algebra**

I can not figure these out for the life of me. Any help is appreciated. 1. Find the final amount of an investment if $2,000 is invested at an interest rate of 8% compounded quarterly for 8 years. I used interest formula and came up with $1,769.08. And then: I = .08/4 = .02 N =...

**Algebra**

Thank you Reiny!

**Algebra**

Find the possible values of a, if the distance between the points is 5, and the coordinates are (1,1) and (4,a) I'm not quite sure how to do this one.. I've tried the distance and midpoint formula, but I'm confused. I don't what to do with the (a-1)^2 part. 5= ...

**chemistry**

calculate the potential of silver electrode in a contact with the following a/ solution that is 0.0150M in I2 and saturated with AgI b/solution that is 0.0040 M in CN- and 0.0600M in Ag(CN)2^-

**chem**

a mean = 0.5, and the standard deviation is 1.84*10^-3 ( gassian statistic apply). How many replicated if the standard error of the mean is not excess 0.001%. Please help, thank you so much

**Statistics**

Tuyns et al. (1977) carried out a case-control study of esophageal cancer in the region known as Ille-et-Vilaine in Brittany, France. The referring data set is oesoph_new.dta, and use logistic regression models to answer each of the following questions. For each question, care...

**sociology**

the book needs to be updated because the same question is from the same book that we read at Rasmussen. It's on page 365.

**English**

RADISH should be written as a plural in line with the other vegetables, i.e, RADISHES.

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

If a small stream of liquid A was strongly deflected by a charged object, liquid B was moderately deflected, and liquid C was weakly deflected rank the liquids in order of polarity. (Assume densities and charges are all equal.)

**Physics-Help!!! bobpursley can u check this again please???**

because there is PEnergy, i get the negative value do i can't take the root of it!!!

**Physics-bobpursley can u check this again please**

Its wrong again. is the value of d same as x??? I'm keep getting the wrong answers for both part a and b.

**Physics-bobpursley can u check this again please**

Q. A 10.6 kg weather rocket generates a thrust of 226.0 N. The rocket, pointing upward, is clamped to the top of a vertical spring. The bottom of the spring, whose spring constant is 402.0 N/m, is anchored to the ground. Initially, before the engne is ignited, the rocket sits ...

**Physics**

I think i got it now.

**Physics**

Thank You bobpursley.

**Physics**

1. A force F = (3.99xi + 2.86yj) N acts on an object as it moves in the x direction from the origin to x = 4.45 m. Calculate the work done on the object by the force. Attemp: since we only consider x direction i multiplied 3.99 by 4.45 but it didnt work out. 2. A 10.6 kg weath...

**how come no one is helping on physics questions!!!**

every physics helpers are not getting any responses. can someone help on physics questions pleases???

**college Physics**

Thank You!!!

**college Physics**

Q. A force F = (3.99xi + 2.86yj) N acts on an object as it moves in the x direction from the origin to x = 4.45 m. Calculate the work done on the object by the force. Attemp: since we only consider x direction i multiplied 3.99 by 4.45 but it didnt work out.

**college physics**

Thank You!!!

**college physics**

Q. A 10.6 kg weather rocket generates a thrust of 226.0 N. The rocket, pointing upward, is clamped to the top of a vertical spring. The bottom of the spring, whose spring constant is 402.0 N/m, is anchored to the ground. Initially, before the engne is ignited, the rocket sits ...

**physics**

Q. A person wants to shoot a rocket off of a mountain 3.26 km high so that the rocket, when shot at 31.3¡Æ above the horizontal from the very top of the mountain, lands at the foot of the mountain 9.37 km (horizontal distance) away. a) What initial speed must the r...

**Poop**

what's another word for poop?

**calculus**

Pretend the program in Senegal had been reducing infant mortality at a rate of 12.5 % per year. How long would it take for infant mortality to be reduced by 38 %?

**calculus**

Pretend the program in Senegal had been reducing infant mortality at a rate of 12.5 % per year. How long would it take for infant mortality to be reduced by 38 %?

**social studies**

I need to fill in 3 blanks to answer the questions what are nonrenewable resources and what are nonrenewable. my choices are oil plants, sun, wind and water For the nonrenewable resources I turned in my paper with oil and water but my teacher marked 1 point off because I left ...

**social studies**

Are wind, water, and sun all renewable rescource

**4thngrade**

THE SOUNDS OF NIGHT-TIME STOOD STILL AS THE WOLF HOWLED IN THE DISTANCE. THE SOUNDS OF NIGHT-TIME WARNED US OF DANGER APPROACHING.

**SCIENCE!!**

i have a question

**psy**

An important factor to consider in choosing your classes is how employers will view the skills you have developed during your college experience. How will you select classes in order to develop the skills employers expect? What other activities might you engage in during your ...

**Chemistry**

thanks, i meant pure substance because its one colour

**Chemistry**

a bottle of a soft drink looks pure, but it is not, how could you demonstrate that it is a mixture? thanks

**com 140**

well i thought that the digifast employees the new services that I'm trying to bring is a bank. This service will benefit the employee of the suite, by keeping them from having to go across town to get to one. During lunch time an employee might want to drive across town t...

**com 140**

can anyone help me I'm working on this final presentation and i have to do a powerpoint presentation but i am undecided on what i shoul include in in i'm currently workin on bringing a new business like a bank to the digifast suite what can i tell the employees how thi...

**Economy**

Ok - thanks. I have the APA down. I am having trouble looking for a web site for articles that discuss the local, state, or federal taxation of a good.

**Economy**

Where do I get started with this? Write a 700- to 1,050-word paper in APA format describing the effects of taxation and price controls on the economy.

**Math**

4^-x=(1/256) I think the answer or I guess the answer I have is: 4^-x=16^-2

**Chemistry**

I need to predict the acid/base reactions of sodium carbonate with HCl, CH3COOH, NH3, and NaOH. I'm stuck, when I'm writing out the ions to find the strongest acid and base, does the NaHCO3 become Na and HCO3, or N, H, and CO3? Also, would these be polyproptic? NaHCO3 ...

**Eng- Hyperbole example**

haaaaaaaaaaaaaaaaaaaaaaaayyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy!!!!!!!!!!!!!!!!!!!iba naman binibigay ng computer

**Eng- Hyperbole example**

haaaaaaaaaaaaaaaaaaaaaaaayyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy!!!!!!!!!!!!!!!!!!!iba naman binibigay ng computer

**Chemistry**

The infrared spectrum of CH3CH2NH2 shows two absorptions not shown by bromoethane. Identify the bonds responsible for these absorptions. I'm a spectroscopist, but not a chemist. Here's my best guess. The CH3CH2NH2 has a NH2 group where a Br would be in bromoethane. The...

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