Saturday

September 24, 2016
Total # Posts: 1,031

**chemistry calculation**

I need to know what volume of liquid phosphoric acid at 85%, H3PO4 with density of 1.685 will replace 5 grams of powdered NaH2PO4. H2O. thanks

*June 1, 2013*

**chemistry calculation**

I need to know what volume of liquid phosphoric acid at 85%, H3PO4 with density of 1.685 will replace 5 gr

*June 1, 2013*

**chemistry**

i ned to know how what volume of liquid H3PO4 at 85% will be the equivalent to 5g of NaH2PO4. and how this calculated. thanks

*May 31, 2013*

**chemistry**

I want to replace 5g per liter of nah2po4 .h2o with h3po4 at 85%. the liquid is 1.685 g/ml

*May 31, 2013*

**Math**

If you roll a die 48 times and 8 of the rolls result in a "5," what empirical probability was observed for the event "5"? (Give your answer correct to three decimal places.)

*May 27, 2013*

**Math**

If you roll a die 48 times and 8 of the rolls result in a "5," what empirical probability was observed for the event "5"? (Give your answer correct to three decimal places.)

*May 26, 2013*

**statistics**

I have got all the other parts but not sure how to come up with this part????In a national survey of 500 business and 500 leisure travelers, each was asked where they would most like "more space."...

*May 26, 2013*

**Statistics**

There is a diagram but I wasn't sure what to call it so I did not know how to look it up. I cant find anything in this chapter on how to calculate r? Or Maple.

*May 26, 2013*

**Statistics**

The accompanying data show the number of hours, x, studied for an exam and the grade received, y (y is measured in tens; that is, y = 8 means that the grade, rounded to the nearest 10 points, is 80). x 2 3 3 4 5 5 5 6 6 6 7 7 7 7 8 y 5 5 6 5 6 7 8 6 9 8 7 9 10 8 9 Maple ...

*May 26, 2013*

**math**

I am lost, can you give me the equations and I will work it out. Sorry not my best subject

*May 26, 2013*

**statistics**

Can someone work this out for me, so I can use as an example to do the other ones. Does it pay to study for an exam? The number of hours studied, x, is compared to the exam grade received, y. x 4 4 6 1 1 y 75 90 95 60 80 (a) Find the equation for the line of best fit. (Give ...

*May 25, 2013*

**statistics**

Help!!I have tried this several times and come up with wrong answer. WHAT PERCENTAGE OF A NORMAL DISTIBUTION IS GREATER THAN THE MEAN? (GIVE ANSWER TO NEAREST PERCENT)THIS ONE I GOT 68% AND IT WRONG... AND WHAT PERCENTAGE IS GREATER THAN A VALUE THAT IS 1 STANDARD DEVIATION ...

*May 25, 2013*

**statistics**

and that still did not help me. So I have tried it again and still did not get it right. please help!!!!

*May 24, 2013*

**statistics**

I put in 5.13 it already has the dollar sign. But it was incorrect..

*May 24, 2013*

**statistics**

This question was previous answered and when I put the answer in it was wrong. I have tried to work out more like it and if that one is not right, what is wrong with it. A study was conducted to investigate the relationship between the cost, y (in tens of thousands of dollars...

*May 24, 2013*

**statistics**

Can someone please tell me how I miss this, I added them up 29 and divided by 8 and came up with 3.625. Below is the question. Please don't send me to other sites and just explain why it is wrong. The number of children, x, belonging to each of eight families registering ...

*May 24, 2013*

**statistics**

would someone please work this problem out in steps so I can understand it. book not helping confusing me more. A study was conducted to investigate the relationship between the cost, y (in tens of thousands of dollars), per unit of equipment manufactured and the number of ...

*May 24, 2013*

**math**

Can someone explain how I missed this question. Sample has a mean of 47 and a standard deviation of 9. Find the z-score for each value of x=53.(give answer correct to 2 decimal places) I did it this way and missed it 53-47divided by 9 = 0.666 and I put 0.6 for the answer. Did ...

*May 23, 2013*

**english**

8. Before writing a recommendation report to the CEO, Dee and Carlos distribute a survey to everyone in their company to determine which new benefits employees are most interested in. What part of the writing process does this activity represent? Writing Planning Revising ...

*May 22, 2013*

**Math**

Can someone explain what to do for the following question. What percentage of a normal distribution is greater than the mean? Give your answer correct to the nearest percent. What formula is used? Because I have to find also 1 standard deviation of the mean and what percentage...

*May 22, 2013*

**sonogram physics**

How much time is required to image a structure at 5cm.?

*May 22, 2013*

**business**

on an organizational chat , span of control refers to the

*May 16, 2013*

**math**

in 2010 i had 36 plums and in 2013 i now have 25 plums, what is the percentage of plums i have cut back on

*May 14, 2013*

**Math**

Three of every seven sales transactions at Dollar Discount are on credit cards. What percent of the transactions are NOT credit card sales? (Round percentages to the nearest tenth.) Answer: 57.1% Is this answer correct?

*May 13, 2013*

**Science**

Pressure is given by the formula -pgh.... p= desity of water , g gravity ,and h height . Pressure at the depth 3.5m =1*9.8*3.5 pa =34.3 pa. Assuming density of water is 1

*May 7, 2013*

**Math**

The Book Nook makes four times as much revenue on paperback books as on hardcover books. If last month’s sales totaled $124,300, how much of that money was made on paperbacks?

*May 1, 2013*

**math**

solve the following inequality. 24x-55<24/x I dont understand this at all!!! please help

*April 22, 2013*

**math**

solve the following inequality. Write your solutions in interval notation. x-5/x+2>=1 I do not know what i am doing at all, please help!

*April 18, 2013*

**Statistics**

The national centre of health statistics reports that the mean systolic blood pressure for males 35-44 years of age is 128 and a standard deviation of 15. A group of 50 executives selected at random are tested and found to have an avarage of 132.3. Is there statistical ...

*April 16, 2013*

**Stastistics**

A quality control audit has been devised to check on the sampling procedure when a truckload of potatoes arrive at a packing plant. A random sample of 250 is selected and examined for bruises and other defects. The whole truckload will be rejected if 5% of the sample is ...

*April 16, 2013*

**Help with statistics**

How did you come up with 2.61 and 1.54 when SD is 2.3?

*April 16, 2013*

**Statistics**

A large electronics company wants to estimate the proportion of all households that own GPS machines. What sample size is required that would give the maximum error of 2.0% for a 95% confidence interval? An unscentific survey had an inital result of 30% .

*April 16, 2013*

**anatomy**

This structure increases the surface area of the interior wall of the small intestine

*April 14, 2013*

**chemistry203**

Determine the equilibrium constant for the following reaaction at 298K. SO3(g)+J2O(g)->H2SO4(l); delta G = -90.5

*April 13, 2013*

**Physics**

A small mirror is attached to a vertical wall, and it hangs a distance of 1.81 m above the floor. The mirror is facing due east, and a ray of sunlight strikes the mirror early in the morning and then again later in the morning. The incident and reflected rays lie in a plane ...

*April 11, 2013*

**physics**

c). at what speed does it hit the ground? d). what total length of time is the ball in the air

*April 2, 2013*

**math 6 grade**

THX DAVID

*April 1, 2013*

**math 6 grade**

Below are some sale prices for soda .Which offers the best price ? a. 6 for $1.75 b.8 for $1.90 c.12 for $3.15 d.30 for $7.50

*April 1, 2013*

**Statistics Help Please**

The following data were collected on non-conformances for a period of 10 days. Day Sample Size Non-conformances 1 100 12 2 100 14 3 100 10 4 100 18 5 100 22 6 100 14 7 100 15 8 100 13 9 100 14 10 100 16 On what day is the proportion of non-conformances largest? smallest? What ...

*March 31, 2013*

**college physics**

an airplane starts from rest and accelerates at a constant 3.00m/s2 for 30.0s before leaving the ground. a). how far did it move? b). how fast was the airplane going when it took off?

*March 29, 2013*

**college physics**

a woman driving at a speed of 23 m/s sees a deer on the road ahead and applies the brakes when she is 210m from the deer. if the deer does not move and the car stops right before it hits the deer, what is the acceleration provided by the car's brakes?

*March 29, 2013*

**Discrete Math**

(2) Suppose A is the set of students currently registered at the University of Calgary, B is the set of professors at the University of Calgary, and C is the set of courses currently being offered at the University of Calgary. Under what conditions is each of the following a ...

*March 22, 2013*

**Science**

Find examples of the golden ratio in nature -- a minimum of 10 examples. Explain how your examples of the golden ratio in nature relates to symmetry found in the animal kingdom.

*March 19, 2013*

**Chemistry**

A 20.0mL 0.3M HCl solution is titrated with 0.4M NaOH. What is the exact pH of the solution before titration? And what is the pH at the equivalence point?(are there any straightforward formulas to use on this kind of problem?)

*March 18, 2013*

**Chemistry**

A 20.0mL 0.3M HCl solution is titrated with 0.4M NaOH. What is the exact pH of the solution before titration? And what is the pH at the equivalence point?(are there any straightforward formulas to use on this kind of problem?)

*March 18, 2013*

**math**

3 tons or 6000 lbs

*March 17, 2013*

**MATHS**

WELL YOU ARE A BUSY PERSON SO THANKS FOR THE HELP ENJOY THE REST OF YOUR DAY

*March 16, 2013*

**MATHS**

I REALLY APPRECIATE AND ADMIRE PEOPLE AS KIND AS YOU KEEP IT UP YOU ARE SUCCESSFUL DONT LET THAT VANISH

*March 16, 2013*

**MATHS**

THANK YOU SO MUCH MISS I AM REALLY THANKFUL FOR YOUR KINDNESS AND BRAINS

*March 16, 2013*

**MATHS**

I REALLY NEED YOUR SMARTNESS

*March 16, 2013*

**MATHS**

SHAPES WITH EQUAL SIDES MISS

*March 16, 2013*

**MATHS**

HOW MANY QUIDULATERALS ARE THER

*March 16, 2013*

**Writing**

An imaginary alien perspective on how they see us humans.

*March 12, 2013*

**Writing**

How should I write a poem from an aliens perspective?

*March 12, 2013*

**Math**

Write two unit rates relating meters and kilometers.

*March 9, 2013*

**Statistics**

A multiple choice test has five choices. Therefore the probability of getting the correct answer by guessing is 0.2. The test has six questions. Use the binomial formula with n = 6 and p = 0.2 to (a) Determine probability of getting two questions correct. (b)Determine ...

*March 3, 2013*

**Statistics**

The heights of young women are approximately normally distributed with a mean of 64.5 inches and a standard deviation of 2.5 inches. Determine the following: what percent of young women would be acceptable as members if being a member required a height of 70 inches or more? ...

*March 3, 2013*

**statistics**

In order to plan for parking and transportation needs at a college, administrators asked students how they got to school. Some came by bus, some came by car and the others used “personal “ transportation – bikes, skateboards, or walked. The following table ...

*March 3, 2013*

**Statistics**

DIAGRAMS MUST BE DRAWN Given the standard normal distribution, determine:Prob Z greater than 1.50 Prob Z between1.06 and 1.96 Given the standard normal distribution determine the Z values that contain 80% in the middle of the curve.

*March 2, 2013*

**Statistics**

This is a standard deviation contest. You have a six sided die with the numbers 1 to 6 written on the faces. a)In order to have the smallest possible standard deviation what number(s) would have to show up if you rolled the die five times? b)In order to have the largest ...

*March 2, 2013*

**statistics**

Boxes of bran flakes are known to be normally distributed with a mean weight of 475g and a standard deviation of 10g.Calculate the probability of a box having a weight exceeding 485 grams. Calculate the probability that the mean weight of sixteen boxes will exceed 480g.

*March 2, 2013*

**Statistics**

Consider a basketball game where a player throws from the free throw line. Her success rate is 65%. If she throws 10 times in a game determine the following:The mean and standard deviation of this binomial distribution.

*March 2, 2013*

**Chemistry**

What volume in milliters of calcium chloride stock solution would you use to make .50 L of 3.00 M of CaCl solution?

*March 1, 2013*

**math**

How did you get 1093.61 because in my book it says the answer is 2188 yards. I did 2*.621*1760=2185. yards.

*February 28, 2013*

**math**

what is 7% of 250,000

*February 28, 2013*

**Geography**

Thank you so much. Have a good day

*February 17, 2013*

**Geography**

Can someone tell me what this question means: Which of these rivers flows entirely within the Northern Hemisphere? Amazon - Parana - Uruguay - Orinoco - Negro. I don't get the question. Thanks

*February 17, 2013*

**Math**

Next door neighbors Moe and Larry are using hoses from each of their houses to fill Moe's pool. They know it takes 12 hours using both hoses. They also know that Moe's hose, used alone, takes 40% less time than using Larry's hose alone. How much time is required to...

*February 11, 2013*

**Math**

A photograph is 25 cm and 20 cm high. It must be reduced to fit a space that is 8 cm high. Find the width of the reduced photograph.

*February 4, 2013*

**Science**

Can you help me with meiosis? Why is meiosis important?

*February 4, 2013*

**Math **

Carl has three lengths of cable,5/6 yard long,1/4 yard long and 2/3 yard long.he needs at least one yard of cable. Which two pieces together Make a k Length at least 1 yard and closest to one yard

*January 31, 2013*

**Pattern blocks **

Make certain shapes using pattern blocks. How many blanks can fit in blanks ?

*January 24, 2013*

**Math high school**

Find the slope of altitude to line AT the coordinates are A(-7,0) and T (9,-7)

*January 13, 2013*

**9th grade algebra**

A(1,-2) and B(-4,-4)

*January 10, 2013*

**Math **

The cost of 2 televisions and 3 DVD players is $1,421. The cost of 1DVD player is half the cost of 1 television. What is the cost of 1 television?

*December 10, 2012*

**english**

addressed to my sister.

*December 4, 2012*

**economics**

While sitting in your office one evening, you begin to think about some of the key microeconomic messages you want to communicate to the Board. (Key concepts include, but are not limited to, supply and demand, pricing, competition, costs & production, and economic value added...

*December 2, 2012*

**algebra**

if 5 times the first number plus 3 times the second number equals 47 and 10 times the first number minus 4 times the second number equals 54, what are the numbers? please explain the steps

*November 26, 2012*

**algebra**

Adam is 3 times as old as Cynthia and Fred is 16 years younger than adam. One year ago, Adam's age was twice the sum of Cythia and Freds age. Find the present ages. I have a=3c f=a-16 a-1=2(c-1 + f-1) and I don't understand what comes next and why

*November 26, 2012*

**algebra**

I need the algebra sentence for the following problem..Adam is 3 times as old as Cynthia and Fred is 16 years younger than Adam. One year ago, Adam's age was twice the sum of Cynthia's and Fred's age.Find their present age.

*November 26, 2012*

**Math**

if a 65 inch of wire is divided into 7 equal pieces how much wire is left over?

*November 19, 2012*

**pre algebra**

Scrambled digits. 91.4 x 63.8 equals 748.84?

*November 16, 2012*

**english**

sue, my neighbor usually plants her flowers in april.

*November 14, 2012*

**chemistry**

starting with a 30% (W/W) SOLUTION OF HYDROGEN PEROXIDE, how many mL would you need to dilute on order to end up with 25.00ml of a 3.6M hydrogen peroxide solution?

*November 5, 2012*

**math**

remember that the word "of" means times

*November 1, 2012*

**Math**

Steve, I see it clearly now....thank you

*November 1, 2012*

**Math**

(x+1)/3 + (3x - 2)/4 = (x + 5)/8 - (7x - 1)/6 - 37/12 I need the steps please...I know the answer

*November 1, 2012*

**math**

the way to write the decimal for 2 is simply 2.00. The decimal equivanlant for 3/4 is .75 add them together and you get 2.75 to find the decimal equivalant for any fraction think of it as a division problem, hence 3 divided by four = .75

*November 1, 2012*

**Math 115**

The area of a parallelogram is 3.36 square feet. The base is 2.8 feet. If the measures of the base and height are each doubled, find the area of the resulting parallelogram.

*October 30, 2012*

**Chemistry**

ÄSvap > 0 Give a molecular interpretation for

*October 25, 2012*

**math**

how to explain 0.26 and 0.260 are same

*October 23, 2012*

**algebra**

hghghddf

*October 20, 2012*

**Algebra**

Marie is 13years older than Joann. The sum of their ages is 55. How old is Joann?

*October 14, 2012*

**Science**

I can't find this answer in my book but can someone tell me if its right please? When you remove electrons from a metal cup, the cup becomes: negatively charged - positively charged or ionized? I think it is negatively charged. Thanks

*October 9, 2012*

**Algebra 2**

x+8<4 help me solve this please.

*October 5, 2012*

**college algebra**

x+8<4 help me self this please,

*October 5, 2012*

**Physics**

Two forces act concurrently on point P. One force is 85 N in a direction 35 degrees north of east. The second 95 N force acting at an angle of 227 degrees, what is the magnitude and direction of the resultant ?

*September 23, 2012*

**Science**

Can someone tell me if this is correct: How many forces act on an upwardly tossed coin when it gets to the top of its path? A. one the force due to gravity B. two gravity & the force in the coin itself C. three gravity the coins internal force & a turnaround force D. none of ...

*September 21, 2012*

**Physics**

An arrow is shot into the air at an angle of 60.3° above the horizontal with a speed of 21.2 m/s. What are the x- and y-components of the velocity of the arrow 3.1 s after it leaves the bowstring? What are the x- and y-components of the displacement of the arrow during the...

*September 17, 2012*