Saturday
March 28, 2015

Posts by jasmine


Total # Posts: 743

Statistics
Long term experience showed that after a type of eye surgery, recovery time has a mean of u = 5.3 days in a hospital. A random sample of 40 patients, with this type of eye surgery, were treated as outpatients during recovery and the sample mean recovery time was 4.2 days. Does...
March 25, 2012

Statistics
The average annual salary of employees at Wintertime Sports was $28,750 last year. This year the company opened another store. Suppose a random sample of 18 employees had an average annual salary of $25,810 with standard deviation of s = $4230. Use a 1% level of significance ...
March 25, 2012

Statistics
How long does it take to have food delivered? A Chinese restaurant advertises that the mean delivery will be no more than 30` minutes. A random sample of delivery times is shown below. Based on this sample data, is the mean delivery time different than 30 minutes? Use a 5% ...
March 25, 2012

Statistics
A large furniture store has begun a new ad campaign on local television. Before the campaign, the long term mean daily sales were $24,819. A random sample of 40 days during the new ad campaign gave a sample mean daily sale of $25,910. Does this indicate that the population ...
March 25, 2012

Statistics
Computer Depot is a large store that sells and repairs computers. A random sample of 110 computer repair jobs took technicians an average of 93.2 minutes per computer. Assume that o is known to be 16.9 minutes. Find a 99% confidence interval for the population mean u for the ...
March 25, 2012

Statistics
Mr. Crandall has assigned a term paper due at the end of the semester. He would like to know the average length of the papers. The data below are the he numbers of types pages from a random sample of 10 term papers. Use these data to compute a 95% confidence interval for the ...
March 25, 2012

Statistics
A random sample of 14 evenings at the O'Sullivan house hold showed that the family received an average of 2.4 solicitation calls each evening. The sample standard deviation was s= 0.9. Find a 99% confidence interval for the population mean number of solicitation calls this...
March 25, 2012

Statistics
A study is being planned to estimate the mean number of semester hours taken by students at a college. The population standard deviation is assumed to be o=4.7 hours. How many students should be included in the sample to be 99% confident that the sample mean is within one ...
March 25, 2012

math
? I need help. I'm asking what it means to simplify :O
March 22, 2012

math
simplify. 1) 9 - 3 - 4 2) 9 + 1 +3 3) 6 + 1 + 3 4) 5 + 4 - 2 5) 6 - 5 + 2 6) 9 - 2 + 5
March 22, 2012

chemistry
If 73.5 g of liquid Br2 and 330 mL of 1.18 M aqueous NaI are reacted stoichiometrically according to the balanced equation, how many grams of liquid Br2 remain? Round your answer to 3 significant figures. 2NaI(aq) + Br2(l) → 2NaBr(aq) + I2(s)
March 20, 2012

chemistry
how many grams are in 49.0 mL of NaOH
March 13, 2012

Calculus 1
A rectangular field is enclosed by a fence and seperated into two parts by a fence parallel to one of the sides. If 600 m of fencing is available, what should the dimensions be so that the area is a maximum?
March 8, 2012

history
I agree its B
March 7, 2012

geometry
State a conclusion that seems reasonable. 6 + 0 = 6, 8 + 0 = 8, 9 + 0 = 9, 100 + 0 = 100. Conclusion:
March 5, 2012

geometry
There are six marbles in the bag and three of them are purple, three of them are black.
March 5, 2012

Calculus
dy/dx = 4xy^2 I need to find the integral of that. So I separate the variables and have 1/y^2 dy = 4x dx. Where do I go from here?
March 2, 2012

Math
8,16
March 1, 2012

Chemistry
I need to find the volume of 5.44 molar nitric acid needed to completely react with 6.27 grams of Ca(OH)2.
February 29, 2012

L.A.
Hi,we are learning about the african americans in america. What would an example of racism like with the white only signs should i do?
February 28, 2012

math
The hour hand is closer to the six
February 28, 2012

math
Hi,does anyone know the basics of adding fractions? For example 2/4+2/8=?
February 28, 2012

World History
The world became more advanced and sports became known.
February 28, 2012

social studies
Yes they were very famous but only the rich could afford them.Then slowly the price came down and they became outdated.
February 28, 2012

english
Like Ms.Sue said you need to understand adverbs.
February 28, 2012

english
The only adjective is Amazon and it's a proper adjective.
February 28, 2012

4th grade
8+4=12
February 28, 2012

Grammer
It is because a pronoun describes a noun.
February 27, 2012

spell
For the following items, mark the choice which is spelled incorrectly. Prolong Perpetuete Protract Continue
February 26, 2012

math
find the percent of decrease. round to the nearest tenth if necessary from 49 cm to 34 cm
February 23, 2012

Engliish Lit-Please recheck
I'm thinking it is a simile but couldn't it be a personification, also?
February 16, 2012

Engliish Lit-Please check
or could it be a simile when it states Nature like Liberty is but restrin'd
February 16, 2012

Engliish Lit-Please check
"Those RULES of old discover'd not devis'd Are nature still, but Nature Mehtodiz'd Nature, Like Liberty is but restrain'd By the same Laws which first herself ordain'd What is this an example of simile hyperbole analogy overstatement personification I...
February 16, 2012

Math
You want to know what her take-home pay is. 1/3 goes to rent, 1/8 goes for her car, 1/6 goes to her food, 1/24 goes towards insurance, and 1/16 of the money is for entertainment. 1/3x represents 1/3 of her unknown amount of take-home payment. 1/8x represents 1/8 of her unknown...
February 15, 2012

7th grade math
Multiply 11 by 7.5 which is 82.5. Next multiply 3.25 by 3.25. Now multiply 12 by 1056.25.
February 14, 2012

math
A tree casts a shadow that is 20 feet long. A 5-foot-tall boy stands in the shadow so that the end of his shadow lines up with that of the tree. His shadow is 6 feet long. How tall is the tree
February 14, 2012

6th grade math
You started with 30.
February 13, 2012

Grade 6 Science
If you rub your hair with a balloon, it will stick up.
February 11, 2012

Civics
How have legal codes change and what roles did philosophers play in the development of law in the United States? should moral codes play a role in society?
February 9, 2012

Grade 6 LA
Listen Sing Dance
February 8, 2012

7th grade Lang. Art
Tamper.
February 8, 2012

math
There are 36 chickens and dogs in the cage, with a total of 100 legs. How many chickens and dogs are there
February 5, 2012

English 7 - Journal Entry Check
It shouldn't be 'I done extra credit`` You should replace done with did.
February 2, 2012

Reading
It means angel.
January 30, 2012

Biology
I have a question and I'm not sure if my answer is correct? The heart is supplied with blood by: diffusion through heart wall right and left cardiac arteries arteries that branch directly from pulmonary arteries arteries that branch directly from aorta I know the heart ...
January 30, 2012

us history
"The Patriots won the Revolution in more ways than one." Explain that sentence. Be sure to think about non-military factors, as well as the obvious military ones.
December 27, 2011

Physics
To determine the work function of a material of a photodiode, you measuered the maximum Knetic energy of .5 eV correwsponding to a certain wavelength. Later on, you cut down the wavelength by 50% and found the maximum kinetic energy of the photoelectrons to be 3.8eV. From this...
December 12, 2011

science
umm yes i would like to know about normal fault please because im having a test on friday so can u give some information on normal faul please
December 12, 2011

math
Explain and show how you would estimate 0.5 x 4.62. Then justify why this is a good choice for arriving at the correct answer.
December 8, 2011

geometry
7. Verify that parallelogram ABCD with vertices A(–5, –1), B(–9, 6), C(–1, 5), and D(3, –2) is a rhombus by showing that it is a parallelogram with perpendicular diagonals.
December 8, 2011

statistics help please
The proportion of Canadians who eat breakfast regularly is 0.9. A simple random sample of 144 Canadians is taken. a. What is the probability that between 0.85 and 0.875 of the sample eat breakfast regularly? b. What is the probability that at least 0.945 of the sample eat ...
December 4, 2011

statistics
Women’s heights are normally distributed with a mean of 162 cm and standard deviation of 16 cm. a. Define an random variable, X, and describe its full distribution including the mean and variance. b. What percentage of heights are greater than 180 cm ? c. What height is ...
December 4, 2011

Chemistry
A pressure of 25.7inHg would be how many kilopascals? Can you do it step by step please. Thank you
November 24, 2011

Physics
The current in a very long, tightly wound solenoid with radius a and n turns per munit length varies in time according to the equation i(t)=Ct^2, where the current i is in amps and the time t is in seconds, and C is constant with appropriate units. Concentric with the solenoid...
November 14, 2011

Physics
A square conducting loop with sides of length L is rotation at a constant angular speed of, w (omega), in a uniform magnetic field of magnitude B. At time t=0, the loop is oriented so that the direction normal to the loop is aligned with the magnetic field. Find the expression...
November 14, 2011

Physics
A square conducting loop with sides of length L is rotation at a constant angular speed of, w (omega), in a uniform magnetic field of magnitude B. At time t=0, the loop is oriented so that the direction normal to the loop is aligned with the magnetic field. Find the expression...
November 13, 2011

Physics
The current in a very long, tightly wound solenoid with radius a and n turns per munit length varies in time according to the equation i(t)=Ct^2, where the current i is in amps and the time t is in seconds, and C is constant with appropriate units. Concentric with the solenoid...
November 13, 2011

math
SOLVE THE EQUATION BY USING EQUIVALENT FRACTIONS? 1. 12/21=X/7, What's X= 2. 12/16=6/Z, What's Z= 3. 4/14=20/Y, What's Y= 4. 16/14=8/Z, what's Z= PLEASE HELP ME!!!!!!!!!
November 13, 2011

Physics
A square conducting loop with sides of length L is rotation at a constant angular speed of, w (omega), in a uniform magnetic field of magnitude B. At time t=0, the loop is oriented so that the direction normal to the loop is aligned with the magnetic field. Find the expression...
November 13, 2011

Physics
A helicopter hovers above the north magnetic field pole in a magnetic filed of magnitude 0.5G perpendicular to the ground. The helicopter rotors are 10m long, are made of aluminum, and rotate about the hub with a rotational speed of 10 000 rpm. What is the potential difference...
November 13, 2011

Physics
The current in a very long, tightly wound solenoid with radius a and n turns per munit length varies in time according to the equation i(t)=Ct^2, where the current i is in amps and the time t is in seconds, and C is constant with appropriate units. Concentric with the solenoid...
November 13, 2011

Physics
A helicopter hovers above the north magnetic field pole in a magnetic filed of magnitude 0.5G perpendicular to the ground. The helicopter rotors are 10m long, are made of aluminum, and rotate about the hub with a rotational speed of 10 000 rpm. What is the potential difference...
November 13, 2011

Physics
A man 1.80 m tall walks at 2.00m/s perpendicular to a horizontal magnetic field of 5.0 T; that is, he walks between the pole faces of a very big magnet. Given that his body is full of conducting fluids, estimate the potential difference induced between his head and feet. I ...
November 13, 2011

Physics
A square conducting loop with sides of length L is rotation at a constant angular speed of, w (omega), in a uniform magnetic field of magnitude B. At time t=0, the loop is oriented so that the direction normal to the loop is aligned with the magnetic field. Find the expression...
November 13, 2011

Physics
The current in a very long, tightly wound solenoid with radius a and n turns per munit length varies in time according to the equation i(t)=Ct^2, where the current i is in amps and the time t is in seconds, and C is constant with appropriate units. Concentric with the solenoid...
November 13, 2011

Physics
So now I noticed that, if I multiply the number of turns to my previous answer, I get .24 V. But I don't know why that must be done.
November 13, 2011

Physics
A solenoid with 200 turns and a cross sectional area of 60 cm^2 has a magnetic field of .60 T along its axis. If the field is confined within the solenoid and changes at a rate of .20 T/s, the magnitude of the induced potential difference in the solenoid will be: a) .00020V b...
November 13, 2011

7th Grade English
done !
November 11, 2011

physics
my answer for these are 1. a 2.c 3 d but not sure so please anyone see if i am correct 1. In which of the following cases is work done on the object? A. Lifting an object off the floor. B. Pushing an object, but it does not move C. Carrying an object at a constant velocity D. ...
November 6, 2011

physics
A child runs down his driveway with an initial speed of 3.0 m/s for 4.5 s, and then uniformly decreases his speed to 0.0 m/s in 2.5 s. What is the boy’s acceleration during the second part of his motion?
November 5, 2011

Math
52.2600.
October 26, 2011

chemistry
what happens to energy released by an exothermic enthalpy change??
October 18, 2011

Math
my home work is hard because it say...The secret number has a 7 in the ones place the tens number is an odd number and i though it will be 87.
October 18, 2011

Science
thanks
October 17, 2011

Science
what kind of plants have life cycle that last several years?
October 17, 2011

Science
what type of plants that leave several years?
October 17, 2011

Botany
what kind of plants have life cycle that last several years?
October 17, 2011

botany
becaue they have seeds
October 17, 2011

botany
why are green algae classified as plants and noy proyists?
October 17, 2011

chemistry
The density of dry air measured at 25 degrees celsius is 1.19 x 10 to the negative 3 g/cm cubed. What is the volume of 50.0g of air?
October 13, 2011

math
303 & 55
October 12, 2011

Math
Salma invested her savings in two investment funds. The that she invested in Fund A returned a profit. The amount that she invested in Fund B returned a profit. How much did she invest in Fund B, if both funds together returned a profit?
October 11, 2011

science
A Kid applies a force of 70 Newtons to a ball over 1.1 meters.How much work did he do on the ball?
October 11, 2011

French 2
Complete the names of the dishes une omelette___fines herbes avec des frites et une salade une glace___chocolat
September 28, 2011

maths
the mean of a set of test scores is 64. a new student takes the same test and scores 80 marks. when his score is added to the other scores, the mean increases to 65. how many students sat for the test altogether?
September 24, 2011

Sociological
There are three primary sociological theries discussed in Chapter One of the text, Introduction to Sociology. Briefly summarize each theory and the major differences across the Functionalist, Conflict, and Symbolic Interaction perspective.
September 23, 2011

math
how do you find all the real zeros for this function f(x)=x^3+9x^2-4x-36
September 21, 2011

chemistry
How do the boiling points of 3.0 m C6H12O6 and 3.0 m CaCl2 compare? A. The boiling point of 3.0 m C6H12O6 is higher. B. The boiling point of 3.0 m CaCl2 is higher. C. They are the same. D. The difference cannot be determined from the information given. I think the answer is D...
September 15, 2011

science
A 63 kg boy and a 44 kg girl use an elastic rope while engaged in a tug-of-war on a frictionless icy surface. If the acceleration of the girl toward the boy is 1.7 m/s 2 , determine the magnitude of the acceleration of the boy toward the girl
September 12, 2011

geometry
Referring to this figure what is the difference in the meaning between the notaions QR( with a line over it) and QR?
August 31, 2011

basic dressmaking processes
1.A Correct 2.D Incorrect PAGES 1-2 3.B Incorrect PAGE 5 4.C Incorrect PAGE 8 5.A Correct 6.D Correct 7.C Incorrect PAGE 18 8.B Incorrect PAGE 32 9.C Incorrect PAGE 37 10.D Correct 11.C Incorrect PAGE 39 12.C Incorrect PAGE 44 13.A Correct 14.B Correct 15.D Correct 16.C ...
August 30, 2011

physics
I am having so much trouble with this D: A rocket is traveling straight up from its launch pad. An observer 5.00 km from the launch pad notices that at one instant, she must tilt her telescope 45.0 degrees upward to see the rocket. 10.0 seconds later, she must tilt her rocket ...
August 25, 2011

8th Math
How do I substract a whole number from a fraction ?!?!?!
August 24, 2011

science
A diesel engine's piston compresses 16 cm3 of fuel-air mixture into 1 cm3. The pressure changes from 1 atmosphere to 48 atmospheres. If the initial temperature of the gas was 305 K, what was the final temperature? Note: As long as the units for pressure and volume are the ...
June 21, 2011

physics
in the model ,how far away from the earth would the sun be?
June 18, 2011

chemistry
What volume does 627 cm3 of a gas at 14°C occupy at 40°C, if the pressure does not change?
June 16, 2011

math
ã2x+4=4
May 25, 2011

math
Solve the radical equation: √300 or ã300
May 25, 2011

math
Simplify: 5/8 divided by 15/16 + 1/2
May 25, 2011

geometry
How do you find the slope-intercept equation of medians of a triangle and perpendicular bisectors of a triangle?
May 22, 2011

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