# Posts by MAry

Total # Posts: 3,807

**Elementary Statistics**

Heights of women have a bell-shaped distribution with a mean of 161 cm and a standard deviation of 7 cm. Using Chebyshev’s theorem, what do we know about the percentage of women with heights that are within 2 standard deviations of the mean? What are the minimum and ...

*September 4, 2012*

**math**

A man buys 3 items for $100. Each item is 50% less than the first. Total of all 3 has to be $100. Is this possible?

*September 3, 2012*

**Financial accounting 2**

If a building cost $600,000, has an estimated residual value of $240,000, has an estimated life of 36 years, and is depreciated by the straight-line method: a) What is the annual depreciation? b) what is the book value at the end of the 20th year?

*September 3, 2012*

**math**

Write the first six terms of each of the sequences whose nth term is a)(-3)n { ____, ____, ____, ____ , ____, ____ } b)3 – 4n { ____, ____, ____, ____ , ____, ____ }

*September 1, 2012*

**math**

how many dimes equal the same total amount as 1,000,000,000 pennies?

*August 30, 2012*

**math**

explain how you know the 6 in 364,021 is NOT in the thousands place.

*August 28, 2012*

**physics**

why it is easier to tear a paper off a full roll than a mostly used one? Is it because of Newton's law?

*August 26, 2012*

**math**

Identify the property of integers being illustrated in each of the following: johmmy a. (-2)(3)€ I b. (-4)0=0 c. -2(3+4)= -2(3)+(-2)4 d. (-2)3=3(-2)

*August 24, 2012*

**math**

95(12) + 24x = 5340 solve for x Simplify the following using properties of exponents. Leave answers as powers. 6^2.2^2.3^2 =

*August 21, 2012*

**math**

Using the distributive property of multiplication over addition, we can factor as in x2 + xy = x1x + y2. Use the distributive property and other multiplication properties to factor each of the following: 47.99 + 47 (x+1)Y +(X+1) x^2y+z^x3

*August 21, 2012*

**math**

The amount of bacteria after n min if the initial amount of bacteria is q and the amount of bacteria triples every 30 sec. (Hint: The answer should contain q as well as n.)

*August 18, 2012*

**math**

If two sets are subsets of each other, what other relationships must they have?

*August 18, 2012*

**math**

The following sets of ordered pairs are functions. Give a rule that could describe each function. Please show your work. A.{(5,3),(7,5),(11,9),(14,12)} B. {(2,5),(3,10),(14,17),(5,26)}

*August 18, 2012*

**math**

it is 17 not 7

*August 18, 2012*

**math**

well just wanted to see how you worked the answer

*August 18, 2012*

**math**

The following sets of ordered pairs are functions. Give a rule that could describe each function. A.{(5,3),(7,5),(11,9),(14,12)} B. {(2,5),(3,10),(14,17),(5,26)}

*August 18, 2012*

**math**

In the following, write an expression in terms of the given variables that represents the indicated quantity: a. The cost of having a plumber spend h hr at your house if the plumber charges $30 for coming to the house and $x per hour for labor b. The amount of money in cents ...

*August 18, 2012*

**math**

The following sets of ordered pairs are functions. Give a rule that could describe each function. A.{(5,3),(7,5),(11,9),(14,12)} B. {(2,5),(3,10),(14,7),(5,26)}

*August 18, 2012*

**physics**

which one best describes appr. uniform velocity? 1. a hockey puck sldng across the ice 2. a baseball pitched toward a batter 3. the tip of the minute hand on a clock 4. an olympic sprinter running the 100m

*August 17, 2012*

**math**

Can you make, using any math symbols, make four 8s equal 5?

*August 16, 2012*

**prealgebra**

At the same time that a 60-foot tall building casts a shadow that is 21.5 feet long, a nearby tree casts a shadow that is 18 feet long. Which measure is closest to the height of the tree?

*August 15, 2012*

**OCHEM**

I have the same question and it doesn't have any impurities.

*August 12, 2012*

**english**

oh yes, it's versus. Also, from the links you gave me, I found that versus means opposite. Thank you really much !!

*August 5, 2012*

**english**

antennae, involuntary , vesus Does any of those words mean opposite or contrasted with??

*August 5, 2012*

**books**

what is the theme for the book called OKAY FOR NOW

*August 5, 2012*

**english**

what is a theme give examples

*August 5, 2012*

**math**

35 is what percentage of 175?

*July 30, 2012*

**math**

the mean of a list of seven numbers is 45. if i add two numbers to this list the mean of he list becomes 37 what is the mean of the two numbers that i added to the list

*July 27, 2012*

**chemistry**

What is the electronic transition for LiCl using this equation 1/(7.01 ×〖10〗^(-7) )= R_H (1/4- 1/(n_f^2 ))

*July 25, 2012*

**english**

Comparison and contrast

*July 24, 2012*

**chemistry**

What is the amount of heat required to turn 1 g of ice into vapor directly without forming a liquid first?

*July 24, 2012*

**Chem 22**

3.5 cm of Mg ribbon(0.009729 g/cm0 reacts with HCL to produce 32.6 ml. of Hydrogengas at 750 mm Hg and 20 degree C. the vapor pressure of water at 20 degree C is 17.5 mm Hg. Calculate the molar volume of hydrogen (L/mole) and the percent error in your determination

*July 23, 2012*

**Chem 22**

3.5 cm of Mg ribbon(0.009729 g/cm0 reacts with HCL to produce 32.6 ml. of Hydrogengas at 750 mm Hg and 20 degree C. the vapor pressure of water at 20 degree C is 17.5 mm Hg. Calculate the molar volume of hydrogen (L/mole) and the percent error in your determination

*July 23, 2012*

**Chem 22**

2.00 grams of hydrocarbon warmed 150.0 ml. water from 25.0 degree C to 30.0 degree C. Calculate the heat of hydrocarbon in K/g. the specific heat of water is 4.184 J/g. degree C

*July 23, 2012*

**PED212**

Reflect on how your perceptions of physical education have changed based on your understanding of its evolution.

*July 19, 2012*

**chemistry**

Thanks Dr. Bob! :D You're the best!

*July 18, 2012*

**chemistry**

I will give an "illustration" as to how I found it. ============ll ll ll========= ll ll ll@ ll ll========= ll ============ll. All the parallel lines illustrate the hot water bag and how it was folded. The "@" is to represent the earphones hidden in the ...

*July 18, 2012*

**chemistry**

Hello, this question is purely out of curiosity, please help to enlighten me. A hot water bag (one of those rubber ones with the rubber stopper at the top you screw in) was hidden under my bed for about a month. It was filled with a bit of water and folded in half during this ...

*July 18, 2012*

**maths**

You deposit $10,000 in an account earning 4% interest compounded monthly. a. How much will you have in the account in 25 years? b. How much interest will you earn?

*July 18, 2012*

**math**

Suppose you are looking to buy a $5000 face value 26-week T-bill. If you want to earn at least 1% interest, what is the most you should pay for the T-bill?

*July 18, 2012*

**maths**

Ten blackberry plants started growing in my yard. Absent constraint, blackberries will spread by 200% a month. My yard can only sustain about 50 plants. Using the logistic growth model, a. Write a recursive formula for the number of blackberry plants in my yard b. Calculate ...

*July 18, 2012*

**Human Services**

program design component for Habitat for Humanity where can I find information about this?

*July 16, 2012*

**math**

If two fair dice are rolled, find the odds in favor of getting doubles

*July 15, 2012*

**Math**

The surface area of any shape is expressed in: A. square units. B. cubic units. C. feet and inches. D. length and width.

*July 14, 2012*

**Math**

A circle is measured by a straight line across its widest part. This line is the __________ of the circle. A. area B. radius C. volume D. diameter

*July 14, 2012*

**Math**

I got B 4.545

*July 14, 2012*

**Math**

Divide: 100/22 = A. 5.011 B. 4.545 C. 4.98 D. 4.345

*July 14, 2012*

**Math**

Convert the mixed number, 1 3/4 , to a fraction. Reduce fraction if necessary. A. 4/12 B. 4/7 C. 7/4 D. 12/4

*July 14, 2012*

**Math**

Thank you Bob :)

*July 14, 2012*

**Math**

What is the volume of a cylinder with the following dimensions: Radius 6ft Height 24ft A. 33.14 ft3 B. 2712.96 ft2 C. 2712.96 ft3 D. 33.14 ft2

*July 14, 2012*

**Math**

Reduce the fraction 20/100. A. 4/20 B. 2/20 C. 1/5 D. 5

*July 14, 2012*

**Case Study**

Gladys strengths includes her desire to see help concerning the spousal abuse she receives at the hands of her husband and the fear she has for her children

*July 2, 2012*

**intermeidate algebra**

solve using elimination method -3x+4y=1, -6x+6y=-3

*June 29, 2012*

**Algebra**

2a+3b-c+(a-b-c)-(2a-4b+3c)

*June 28, 2012*

**physics**

1. A yacht is tacking into the wind on a zigzag path. On the rst leg of the course, the yacht has a displacement of 12 km at 840 north of east. After a second leg has been completed, the yacht's resultant displacement is 10 miles at 230 west of south. Determine the ...

*June 27, 2012*

**English**

Here's my issue with A. Connor waited in line is one complete sentence. Ava parked the car is another complete sentence. "While" is used as a conjuction here - not as a preposition.

*June 26, 2012*

**Math**

find the perimeter and area of a right triangle if the shortest side is 9 inches and the longest side is 41 inches

*June 26, 2012*

**math**

A recreation room has the following dimensions. Carpeting will cost $1.50 per square foot. How many square feet of carpet will be needed and how much will it cost?15 ft, 33 ft, 12 ft, 12 ft.

*June 26, 2012*

**chemistry**

Titration of 50.00 mL of 0.0521 M sodium oxalate, Na2C2O4, required 38.71 mL of a potassium permanganate solution: 5 C2O42- + 2MnO4- + 16H+ = 2Mn2+ + 10 CO2 + 8H2O Calculate the molarity of the potassium permanganate solution.

*June 23, 2012*

**chemistry**

A 0.8378 g sample of calcium oxalate is heated to 1000oC, CaC2O4 = CaO + CO + CO2 Calculate (a) the moles of CaO remaining after ignition (b) the mmoles of CO evolved (c) the weight of CO2 produced.

*June 23, 2012*

**chemistry HELP!**

How much of a 0.10 M H2SO4 solution is required to neutralise 1g of NaOH? Express your answer in cm3.

*June 23, 2012*

**math**

how do you do 16.1 divided by .023 ?

*June 20, 2012*

**social studies**

Between 1935 and 1957, a period that included World War II, the birth rate rose from 16.9 to 25 per 1000 people. What was the most likely cause of this "baby boom?" A) the change in view toward artificial birth control methods B) the return of young American soldiers...

*June 18, 2012*

**Algebr 1B**

Simplify if possible x^2+17x/x^2-9x+x^2-10x/x^2-9x

*June 10, 2012*

**literature**

In the call of the wild,what did Buck dream about by the campfire?

*June 6, 2012*

**History**

That is wrong! it is not C

*June 6, 2012*

**Math**

I know that 35 divided by 7 equals 5, knowing this how does it help me to find 42 divided by 7? Explain

*June 5, 2012*

**Math**

I know the answer I just need to know how to explain it!

*June 5, 2012*

**Math**

How could knowing that 35 divided by 7 equals 5 help me find 42 divided by 7?

*June 5, 2012*

**Chemistry**

A sample of methane gas at room temperature has a pressure of 1.50 atm and a volumne of 10.5 L. If the temperature is kept constant, what will be the new volume if the pressure is increased to 2.00 atm?

*June 3, 2012*

**Chemistry**

a basketgball is inflated to a pressure of 1,50 atm in a 20.c garage. What is the pressure of the basketball outside whre the temperature is -5.00 C?

*June 3, 2012*

**fractions**

I need a fraction example using 1024 x 768. It is for building a web page. So I guess the fractions would be 1024/1 x 768/1 .Any help would be great. The 1024 and 768 is what size monitor the screen is

*May 31, 2012*

**world geography**

japan

*May 30, 2012*

**10th grade chemistry**

What is the oxidizing agent during discharge

*May 29, 2012*

**algebra**

Add 12/5 and 8/13. Fractions show how it is done please.

*May 28, 2012*

**methods and analysis of quantitative research**

The graduate selection committee wants to select the top 10% of applicants. On a standardized test with a mean of 500 and a standard deviation of 100, what would be the cutoff score for selecting the top 10% of applicants, assuming that the standardized test is normally ...

*May 26, 2012*

**Physics**

Two cubic blocks are in contact, resting on a frictionless horizontal surface. The block on the left has a mass of mL = 6.70 kg, and the block on the right has a mass of mR = 18.4 kg. A force of magnitude 112 N is applied to the left face of the left block, toward the right ...

*May 25, 2012*

**writing**

how could bad therapeutic communication affects a patients outcome?

*May 24, 2012*

**Reimbursement Methodologies**

Your're a coder who's reviewing the record of a 62-year-old woman who was admitted to the hospital with shorness of breath and minor ches pain. The doctor diagnosed the patient with Staphylococcus aureus pneumonia and you assigned a code of 482.41. Additionally, you ...

*May 21, 2012*

**Statistics**

A researcher found a sample proportion of 0.94 for estimating the population proportion of freshmen at a university who had Facebook accounts. If the standard deviation of the sampling distribution of the sampling proportion is 0.02, what is a 95% confidence interval for the ...

*May 18, 2012*

**Statistics**

From random sample of 200 college students, 40 students indicated that they smoke cigarettes. Use the information from the sample to calculate a 95% confidence interval for the population proportion of college students that smoke cigarettes (round to nearest hundredth). A. (0....

*May 18, 2012*

**Statistics**

1000 scientists create 95% confidence intervals for parameters of interest. If they all compute the confidence intervals correctly, how many of the intervals would we expect to contain the true population parameter? A. 950 B. 0 C. 95 D. 1000

*May 18, 2012*

**Statistics**

Which of the following statements best describes the uncertainty associated with a 95% confidence interval for a population proportion, computed from a simple random sample? A. We don't know whether the particular confidence interval is successful or not, but 95% of ...

*May 18, 2012*

**Statistics**

A Gallup Poll reported the percentage of Americans who approve of the President's job performance was 47% with a margin of error of 2 percentage points. What is a 95% confidence interval for the population percentage? A. 41% to 53% B. 45% to 49% C. 46% to 48% D. 43% to 51%

*May 18, 2012*

**Statistics**

In a poll of 1,000 adults, 57% believed that there was too much inappropriate content on TV. A 95% confidence interval for the proportion is given as 0.54 to 0.60. What is the margin of error of this poll? A. 0.54 B. 0.015 C 0.03 D. 0.57

*May 18, 2012*

**Math equation**

I have no idea how to solve this. f(x)=3x-4 a) f(10) b) f (-2) c) f (0) d) (b)

*May 17, 2012*

**chemistry**

How many moles of H2 would be formed from 30 grams of Na in the following (UNBALANCED) equation? Na + H2O → NaOH + H2

*May 17, 2012*

**Human Services**

develop at least one process evaluation measure and at least one outcome evaluation measure that you suggest for the Consultation and Education department at Greenby Community Mental Health Center to display the program’s effectiveness and efficiency.What issues and ...

*May 15, 2012*

**Math**

Sales tax on nonfoor items is 7%. Which equaation shows relationship of the price of item p to the total cost c? p=1.07c c=1.07p p=7c c=7p Why is this the correct one?

*May 9, 2012*

**Physics**

A flywheel of a radius .5 m starts from rest and under goes a uniform angular acceleration of 3 rad/sec2 for a period of 5 seconds. Find the angular velocity of the flywheel at the end of this time? Find the angular displacement (in radians) that the wheel turns through during...

*May 9, 2012*

**math**

A=1/2bh=1/2 (b)(b+4) 22.5=1/2 (b2+4b) 45=b2+4b b2+4b-45=0 (b-5)(b+9)=0 b-5=0 b=5 h=b+4=5+4=9

*May 9, 2012*

**HUM111**

How do you think you can be best prepared and ensure a successful outcome when interviewing someone?

*May 7, 2012*

**Math**

A box contains 4 red cubes, 3 blue cubes, 2 green cubes, and 1 yellow cube. You pick two cubes at random, replacing each after you pick. Find the probability of each compound event.

*May 2, 2012*

**Math**

The dividend is 5600. The divisor and the quotient have a difference of 10. Write the division sentence

*May 1, 2012*

**phi 103**

false

*April 30, 2012*

**algebra**

It took a contractor 1285 hours to manufacture their first unit of an item. If the contractor expects to acheive a 92% unit learning curve, how many hours would be required to manufacture units 51-100/

*April 27, 2012*

**history**

by 1910, why had public-school enrollment reach a record high a. increased funding for scholarships b. improved conditions in the school c. higher family incomes d. passage of laws requiring attendance

*April 26, 2012*

**Trigonometry**

Do I have to solve the right side of the equation first or bring it over to the left side?

*April 25, 2012*

**Trigonometry**

Fine the complete exact value of sin x = -sqrt3/2. I'm very lost as to how to even begin this problem.

*April 25, 2012*

**computers**

powerpoint presentation assignment how will i explore the role that family and society play in the development of the individual's sense of self.

*April 23, 2012*