Wednesday

April 23, 2014

April 23, 2014

Total # Posts: 635

**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% lev...

**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 mea...

**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 c...

**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 p...

**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...

**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 seme...

**math**

? I need help. I'm asking what it means to simplify :O

**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

**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)

**chemistry**

how many grams are in 49.0 mL of NaOH

**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?

**geometry**

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

**geometry**

There are six marbles in the bag and three of them are purple, three of them are black.

**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?

**Math**

8,16

**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.

**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?

**math**

The hour hand is closer to the six

**math**

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

**World History**

The world became more advanced and sports became known.

**social studies**

Yes they were very famous but only the rich could afford them.Then slowly the price came down and they became outdated.

**english**

Like Ms.Sue said you need to understand adverbs.

**english**

The only adjective is Amazon and it's a proper adjective.

**4th grade**

8+4=12

**Grammer**

It is because a pronoun describes a noun.

**spell**

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

**math**

find the percent of decrease. round to the nearest tenth if necessary from 49 cm to 34 cm

**Engliish Lit-Please recheck**

I'm thinking it is a simile but couldn't it be a personification, also?

**Engliish Lit-Please check**

or could it be a simile when it states Nature like Liberty is but restrin'd

**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&...

**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.

**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

**6th grade math**

You started with 30.

**Grade 6 Science**

If you rub your hair with a balloon, it will stick up.

**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?

**Grade 6 LA**

Listen Sing Dance

**7th grade Lang. Art**

Tamper.

**math**

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

**English 7 - Journal Entry Check**

It shouldn't be 'I done extra credit`` You should replace done with did.

**Reading**

It means angel.

**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 get...

**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.

**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...

**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

**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.

**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.

**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 brea...

**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 a...

**Chemistry**

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

**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...

**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...

**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...

**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...

**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!!!!!!!!!

**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...

**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...

**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...

**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...

**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 thi...

**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...

**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...

**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.

**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)...

**7th Grade English**

done !

**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. ...

**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?

**Math**

52.2600.

**chemistry**

what happens to energy released by an exothermic enthalpy change??

**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.

**Science **

thanks

**Science **

what kind of plants have life cycle that last several years?

**Science **

what type of plants that leave several years?

**Botany **

what kind of plants have life cycle that last several years?

**botany**

becaue they have seeds

**botany**

why are green algae classified as plants and noy proyists?

**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?

**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?

**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?

**French 2**

Complete the names of the dishes une omelette___fines herbes avec des frites et une salade une glace___chocolat

**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?

**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.

**math**

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

**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....

**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

**geometry**

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

**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 Correc...

**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 ...

**8th Math**

How do I substract a whole number from a fraction ?!?!?!

**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 ...

**physics**

in the model ,how far away from the earth would the sun be?

**chemistry**

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

**math**

ã2x+4=4

**math**

Solve the radical equation: √300 or ã300

**math**

Simplify: 5/8 divided by 15/16 + 1/2

**geometry**

How do you find the slope-intercept equation of medians of a triangle and perpendicular bisectors of a triangle?

**English**

Discuss any areas related to citing sources that you find confusing or difficult understand or apply. In your responses to others offer suggestions to help understand the issue.

**Science**

What are the properties of iron sulphide?

**Math**

-20=-4x-6x

**Math**

A child's train ticket costs $7. That is 1/4 as much as an adult's ticket. How much does an adult's train ticket cost?

**English **

Describe the confrontation between Ralph and Jack in Chapter 6 of Lord of the Flies.

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