# Posts by donna

Total # Posts: 504

**Chemistry**

What is [OH-] of a solution containing 013 mol Ba(OH)2 and .021 mol KOH in .50L of H2O?

**Intermediate Algebra**

if a system has an infinite number of solutions, use set-builder notation to write the solution set. If a system has no solution, state this. m - 2n = 16, 4m + n = 1

**Intermediate Algebra**

If a system has an infinite number of solutions, use set−builder notation to write the solution set. If a system has no solution, state this. y = x + 2, 3y − 2x = 4

**chemistry**

3 Fe + 4H2O= Fe3O4 + 4H2

**chemistry**

At 900 degrees C, Kc for the reaction is 5.1. if .050 mole of H20 and .100 mole of Fe are placed in a 1L container at 900 degrees C, how many grams of Fe3O4 are present at equilibrium?

**MATHS**

Complete the pattern. 1,1,4,25,--------,749956 Thanks for your help

**math**

George saves 18% of his total gross weekly earnings from his 2 part-time jobs. He earns $6.25 per hour from one part-time job and $7.50 per hour from the other part-time job. George works a total of 40 hours between the two jobs each week. What additional information is needed...

**Math**

complete the pattern: 1, 64, 2 ,32, 4, 16, ___ , ____.

**Statistics**

What are the most prudent decisions Avionics, Inc.can make about it's responsibilities to itself and others?

**6th grade english/pronouns**

This might help: Personal pronouns, Possessive determiners, Possessive pronouns Personal pronouns Possessive determiners Possessive pronouns as subject(nominative)as object (accusative and dative) I me my mine you you your yours he him his his she her her hers it it its its we...

**algerbra**

the length of a rectangular jewlery box is 6 inches more than twice the width. the perimeter is 54 inches find length and width.

**math 115**

b) The representative tells you that floor plan #1 sells for $300,000 and floor plan #2 sells for $200,000. She also mentions that all the available houses combined are worth $3,300,000. Write an equation that illustrates this situation. Use the same variables you used in part...

**math 115**

I am stuck with this problem can some let me know how to work this problem please help me The representative tells you that floor plan #1 sells for $300,000 and floor plan #2 sells for $200,000. She also mentions that all the available houses combined are worth $3,300,000. ...

**math 115**

I am stuck with this problem can some let me know how to work this problem please help me The representative tells you that floor plan #1 sells for $300,000 and floor plan #2 sells for $200,000. She also mentions that all the available houses combined are worth $3,300,000. ...

**MATHS**

How many minutes before 12 noon is it, if one hour ago it was three times as many minutes after 8 am? Thank you

**Math 116**

Is this correct so far...I just want to know if I am doing this.. b) The representative tells you that floor plan #1 sells for $300,000 and floor plan #2 sells for $200,000. She also mentions that all the available houses combined are worth $3,300,000. Write an equation that ...

**Algebra 115**

Is this correct so far...I just want to know if I am doing this.. b) The representative tells you that floor plan #1 sells for $300,000 and floor plan #2 sells for $200,000. She also mentions that all the available houses combined are worth $3,300,000. Write an equation that ...

**math 115**

dID IU do this right not sure and I thank you for helping ahead of time... 1. Suppose you are in the market for a new home and are interested in a new housing community under construction in a different city. a) The sales representative informs you that there are two floor ...

**college biostatistics**

if the mean bp is 110 and the standard deviation is 15 where would 95% of population be

**Finance**

"An investor is proposing to buy shares in XYZ company. XYZ company is expected to an annual dividend of $2.50 per share. The current share price is $50.00. If the investor requires an annual rate of return of10%, what must the share price be in 1 yr?.

**math**

how is it possible for a triangle to have angles of 90, 50 &60

**math**

three circles are externally tangent to each other. The radius of each circle is 6 inches. Find the following: a)the length of the shortest wire athat goes around them. b) the shaded area (space between them when stacked one circle on top of two)

**Algebra 115**

thank you so do you think the way I did is also right

**Algebra 115**

I have been trying this on my own and just want to know if this is right are not 2. Suppose that the linear equation y = 0.3x + 0.9 represents an estimate of the average cost of gas for year x starting in 2002. The year 2002 would be represented by x = 1, for example, as it is...

**english**

what are the similarities between "A Rose for Emily" and "Blu Winds Dancing"

**math**

5x-6y=12

**math 115**

You are planning to spend no less than $8000. and no more than 12,000 on your landscaping project. Write an inequality that demonstrates how much money will be willingto spend of the project

**Math 116**

What is an inequality

**Math**

how do I solve: -1 cubed-(-1)to the fourth +(-1) to the fifth - (-1)to the sixth thanks

**9th grade**

two of the forms of a linear equation are standard form and slope-intercept form. explain when each one is more useful

**MATHS**

The sum of three consecutive multiples of 3 is 36. The smallest of the three will be.....? answer is 9

**math**

What is the teacher wanting. 10,13,17,22,.........................25

**5th grade**

Ellie works at a camp. Her age is a multiple of 6 and a multiple of 8. what is the youngest age Ellie could be?

**math**

P (-1.3 less than or equal to Z less than or equal 0) P (-1.3 ¡Ü Z ¡Ü 0)

**math**

P(Z greater than 2.5)

**random variables**

For the standard normal random variable Z, compute the following probabilities. For the following problems, use four decimal places. 16. P (0 ¡Ü Z ¡Ü .9) 17. P (-1.3 ¡Ü Z ¡Ü 0) 18. P(Z > 2.5) 19. P(Z ¡Ý -.75) 20. P(Z...

**college**

if a license plate consists of 2 letters followed by 4 digits, how many different plates could be created having at least one letter or digit repeated? I know its not 6,760,000

**Statistics**

1-5 the question is asking if these they can be found in a linear programming model? I couldn't use the symbols of greater than or equal to because it makes a weird symbol after I post the question.

**Statistics**

Which of the following mathematical relationships could be found in a linear programming model? Choose YES if the relationship could be, and NO if it could not. A. YES B. NO 1. B-2A + 7B = 45 2. 4A - B less than or equal to 10 3. A + \ 2B greater than or equal to 22 4. 3A + ...

**Statisics**

Max 2A + 7B s.t. A + B greater than or equal to 12 2A + 2 B less than or equal too 26 B greater than or equal to 1 A, B greater than or equal to Which of the following would be found in the correct standard form? A. YES B. NO A + B - S1 = 12 2A + 2B - S2 = 26 2A + 2B + S2 = 12...

**linear programming**

For the linear program Max 2A + 7B s.t. A + B greater than or equal to 12 2A + 2 B less than or equal too 26 B greater than or equal to 1 A, B greater than or equal to Which of the following would be found in the correct standard form? A. YES B. NO A + B - S1 = 12 2A + 2B - S2...

**Linear programming**

Which of the following mathematical relationships could be found in a linear programming model? Choose YES if the relationship could be, and NO if it could not. A. YES B. NO 1. B-2A + 7B = 45 2. 4A - B less than or equal to 10 3. A + \ 2B greater than or equal to 22 4. 3A + ...

**Math-linear programming**

sorry the question goes with the one before this question

**Math-linear programming**

the exclamation Y, the symbol is actually greater than or equal to: A + B greater thanor equal to 12 2A + 2B less than or equal to 26 B greater tha or equal to 1 A, B greater than or equal to

**Math-linear programming**

Max 2A + 7B s.t. A + B ¡Ý 12 2A + 2 B ¡Ü 26 B ¡Ý 1 A, B ¡Ý

**Math-linear programming**

Which of the following mathematical relationships could be found in a linear programming model? Choose YES if the relationship could be, and NO if it could not. A. YES B. NO 1. B-2A + 7B = 45 2. 4A - B ¡Ü 10 3. A + \ 2B ¡Ý 22 4. 3A + 2B - AB = 12 5. 2A2...

**Math-linear program**

For the linear program Max 2A + 7B s.t. A + B ¡Ý 12 2A + 2 B ¡Ü 26 B ¡Ý 1 A, B ¡Ý Which of the following would be found in the correct standard form? A + B - S1 = 12 2A + 2B - S2 = 26 2A + 2B + S2 = 12 A - S3 = 1 B - S3 = 1 2A...

**algebra2**

minus

**algebra2**

i don't think there is a solution for this one. 3-y=1 _____ 4-y y-4 help please

**algebra2**

y-6= 2/7 ____ y+4

**algebra2**

its suppposed to be y=

**algebra2**

y-6 bottom number y+4 and then 2 with a lind on bottom and 7

**algebra2**

y-6=2 y+4 _= help 7

**sociology**

I need a 200 page story describing how the yanomamo indians relate to a concept in the sociology book

**History 125**

Create a five to seven-point bullet point list of the factors that led to political stalemate and the subsequent farmer's revolt in the late 19th century

**college**

Find the slope and the y-intercept of the line, 5x=8y+72

**Business**

For a continuous random variable x, the population mean and the population standard deviation are 80 and 15 respectively. You extract a sample of 25 elements from this population. The mean of the sampling distribution of the sample mean is

**math**

At a party, there were 105 handshakes. If each person shook hands exactly once with every other person, how many people were at the party?

**HCA/220**

How might a foundation in medical technology help you in fulfilling your education? How might a basic understanding of medical terminology benefit you personally?

**science help please**

Asexual reproduction is reproduction which does not involve meiosis, ploidy reduction, or fertilization. Only one parent is involved in asexual reproduction. Sexual reproduction involves processes like meiosis and fertilization to pass a combination of genetic materials to ...

**Social Studies**

Farmers¡¦ Revolt „h Create a bullet point list of the factors that led to political stalemate and the subsequent farmers¡¦ revolt in the late 19th Century. Adress the relationship between the issues the political system dealt with in the Gilded ...

**College Chemistry**

A 0.05 molal aqueous solution boils at 373.102 K. What is the salt in question? a. AlCl3 b. NaHSO3 c. MgCl2 d. NH4Cl e. NaCl I guessed NH4Cl and got 3 points off. I used the formula delta T=K boiling point X molality

**College Chemistry**

The boiling point of a liquid at atmospheric pressure is the temperature: a. at which bubbles of vapor expand within the liqud b. at which the liquid solidifies c. at which the vapor pressure first exceeds the critical temperature d. at which the vapor pressure is equal to the...

**college Chemistry**

An aqueous solution of hydrogen peroxide, H202 (MW=34.01amu), is labeled 10.0% by weight. What is the molal concentration of H202? All I really know is that molality = moles of solute per kilogram of solution

**College Chem**

If equal masses of O2 and N2 are placed in identical containers at the same temperature, which of the following statements is (are) true? a. both flasks contain the same number of molefules b. the pressure in the N2 flask is greater than in the other container c. there are ...

**College Chem**

If equal masses of O2 and N2 are placed in identical containers at the same temperature, which of the following statements is (are) true?

**College Chem**

The boiling point of water at 756 mm Hg is 99.85 degree C. What mass percent of surcrose (C12H22O11) should be present to raise the boiling point to 100.00 degree C at this pressure?

**math**

An inheritance of $50,000 is divided into two investments earning 8.5% and 10% simple interest. ( The 10% investment has a greater risk.) Your objective is to obtain a total annual interest income of $4700 form the investments. What is the smallest amount you can invest at 10...

**math**

a truck driver traveled at an average speed of 48 miles per hour on a 100-mile trip to pick up a load of freight. On the return trip with the truck fully loaded,the average speed was 40 miles per hour. Find the average speed for the round trip.

**college**

how many grams of magnesium are required to produce 2.154 g of magnesium nitride?

**college**

how to figure out how many grams of magnesium are required to produce 2.154grams of product?

**CHEMISRTY**

HOW MANY GRAMS OF MAGNESIUM ARE REQUIRED TO PRODUCE 2.154 GRAMS OF PRODUCT? STEP BY STEP EXPLAINATION

**college**

how to I figure how much copper is in 2.154 gram of copper sulfide?

**math**

How can I construct a stem and leaf plot with the midterm test scores of the seventh-period typing class with the list below? 77, 93, 91, 74, 65, 68,97, 88,59,74, 83, 85, 72, 63, 79

**math**

A right rectangular and right triangular prism. This is what the question said.

**math**

A right rectangle and a right triangle prism have the same height. If the lenght of the side of the rectangle base is twice the width, explain how to determine the area of the triangular base in terms of the rectangle base length.

**math**

a right rectangle and a right triangle prism have the same height. If the lenght of the side of the rectangle base is twice the width, explain how to determine the area of the triangular base in terms of the rectangle base length.

**math**

Consider the right circular cone shown. if the radius of the circular base remains the same and the height varies, what is the minimum surface area and minimum volume the cone can have?

**math**

How can I construct a stem and leaf plot with the midterm test scores of the seventh-period typing class with the list below? 77, 93, 91, 74, 65, 68,97, 88,59,74, 83, 85, 72, 63, 79

**math**

explain how the meter, liter, and gram are related

**math**

A multiple choice answers for the question. What is the measure of the dent angle for a star-shaped polygon with 20 points and a dent angle of 12 degrees? Asnwers are; 30 degrees, 50 degrees, 60 degrees, 90 degrees. How do I find the answer?

**Math**

Yes I did, this is how it is written. This has multiple choice answers; 30 degrees, 50 degrees, 60 degrees, 90 degrees? What is the answer?

**Math**

What is the measure of the dent angle for a star-shaped polygon with 20 points and a dent angle of 12 degrees?

**Chem**

Osmotic Pressure.. If the height of the column is 6 cm what is the osmotic pressure of the sugar solution in g/cm2 Assume the density of the solution is 1.01 g/ml.. Beaker of water with beaker of sugar solutution with semi permeable membrane

**MATHS**

A three-tonne truck is allowed to have a gross mass (when fully loaded) of 7.5 tonnes. If it is carrying 0.5t of sand, 1.25t of brick and 4 bags of cement each weighing 40kg, what is the maximum extra mass which can still be placed on the truck before it is over-loaded? My ...

**chemistry**

i need help with this question. any help would be appreciated. 1) What concentration Of H^+(aq) corresponds to each of the following:(a)pH=3.33,(b)pOH=3.33,(c) pH=6.78,(d)pOH=11.11?

**Social Studies**

Cow head is kind of a morel with the ridged and pitted fertile portion attached to the stipe for about half its length Familiarity information: COW'S HEAD used as a noun is very rare.

**history**

OGT question List what you believe are the 5 most important effects of industrialization and explain why you chose those five.

**Chemistry**

Estimate the solubility of lead (ll) chloride in grams per liter. ksp= 1.7 x 10^-5

**chemistry**

Calculate the pH of a 0.35 M solution of dimethylamine, (CH3)2NH.

**Physical Science**

A force of 400.0N is exerted on a 1,250N car while moving it a distance of 3.0m. How much work is done on the car.

**Maths**

Two people are about to begin an 18000 km trip across Asia in a Land Rover. They know that each tire will last for exactly 12000 km and not one bit more. Since they have a four-wheeled vehicle, can you figure out the least number of spares they need to complete their trip?

**chemistry**

Is Procion Red Dye a suitable model for chemistry lab?

**chemistry**

Is Procion Red dye a suitbale model?

**3rd grade**

need a website that shows polygons

**MATHS**

YEAR 5 Vincent took 1 1/2 times as long as Marcus to finish a school project. If it took them 30 days in total, how much longer did it take Vincent to complete his work? Thank you

**Atmospheric Science**

The current magnitude of the greenhouse effect is measured by the difference between the emission from the surface and the emission from the top of the atmosphere, € G =σTs 4 −σTe 4 ≈ 150 W m-2. What would be the required magnitude of the greenhouse ...

**Atmospheric Science**

Estimate the rate of freshwater mass production (kg s-1) b the melting of the North American ice sheet, assuming its melting took 500 years. How does this compare with the rate of deep-water formation in the North Atlantic, which is estimated to be about 2 x 10^10 kg s-1 at ...

**Chemistry**

A 100.0 mL of 0.200 M methylamine, CH3NH2, is titrated with 0.100 M HCl. Calculate the pH after 70.0 mL of 0.100 M HCl has been added.

**Atmospheric Science**

Assuming that the base of a building is 330 ft. above sea level, give a total correction to sea level for the station pressure of -664 N/m^2.