Friday

November 27, 2015
Total # Posts: 2,385

**Chemistry**

and NH4H2PO4 thanks DrBob22
*November 25, 2015*

**Chemistry**

Write the formulas of the compounds formed by NH4+ with the following anions: CN-, ClO3-, SO42-, H2PO4-
*November 25, 2015*

**physics**

Calculate the Specific Gravity of an object that sinks in water if m = 21.97 g and mA = 17.40 g.
*November 23, 2015*

**phyics**

Calculate the specific gravity of a liquid given the following information: m = 59.30 g, mA = 33.78 g, mL = 43.60 g.
*November 23, 2015*

**Pre-calculus**

Initially 600 milligrams of a radioactive substance was present. After 7 hours the mass had decreased by 3%. Construct an exponential model A(t) = A0ekt for the amount remaining of the decaying substance after t hours. Find the amount remaining after 24 hours.
*November 23, 2015*

**Statistics **

The ratio of brown M&M’s in a bag is stated by the candy company to be 56%. If a random sample of 500 bags is selected, determine the probability that the sample proportion of random bags of M&M’s selected has a percentage of brown between 51% and 59% p=.56 standard ...
*November 23, 2015*

**Chem**

The solubility of calcium sulfate is1.90g of caso4 per liter of aquences solution at 25c. The formula weight of caso4 is 136.11 calculate the solubility product of caso4.
*November 17, 2015*

**physics**

If a standing wave with 10 antinodes occurs at a frequency of 44.1 Hz, at what frequency would you look for the n = 2 standing wave?
*November 16, 2015*

**physics**

If a standing wave with 10 antinodes occurs at a frequency of 44.1 Hz, at what frequency would you look for the n = 2 standing
*November 16, 2015*

**physics**

You take a set of measurements for the wavelengths and frequencies of standing waves on a string that is under a tension of 2.20 N. You use your data to create a plot of wavelength (in m) vs inverse frequency (in s) and the linear fit of your graph gives a slope of 19.0. What ...
*November 16, 2015*

**mATH**

Mr. Adams said that 10 more than 7 times his age is 9 years fewer than 5 times his age with the digits reversed. How old is Mr. Adams?
*November 11, 2015*

**Math**

If a triangl if a triangle triangle has a perimeter of three units with a row of two connecting triangles the parameters for units what is the perimeter of a row of Tronic 20 triangles triangles
*November 10, 2015*

**math**

moniques family was very impressed with their waitress. the cost of their dinner was $85. They want to leave 20% tip. how much should they leave?
*November 9, 2015*

**algebra 1**

rene needs to determine the equation of a line passing through the point (-1,7) that is parallel to y=-3x-4 a. y=-3x+7 b. y=-3x+4 c. y=3x-7 d. y=3x-4
*November 9, 2015*

**Math**

So it is the 2 that is in the thousandths place. To Ms. Sue
*November 5, 2015*

**Math **

Sorry the number is 0.8923 which digit is in the thousandths place? I believe it is the 8 but the 0 is throwing me off
*November 5, 2015*

**Math**

Which digit is in the thousandths place am confused by the 0 but I believe the 8 is in the thousandths place.
*November 5, 2015*

**Math**

was working it to fast forty-nine
*November 5, 2015*

**Math**

I have to write this number in word form 1,358,049? Is it One million, three hundred fifty-eight thousand, forty-five
*November 5, 2015*

**math**

At a school there are 704 chairs to place into 22 classes if the same number of chairs are placed in each class rooms how many chairs will be in each room? So I divided 704 by 22 and came up with 32 chairs and I correct.
*November 3, 2015*

**math**

Thank you Ms. Sue
*November 3, 2015*

**math**

3,537,000
*November 3, 2015*

**math**

3,537
*November 3, 2015*

**math**

The total land area for the United States is 3537438.98 square miles what is the value rounded to the nearest thousand square miles?
*November 3, 2015*

**physics**

To leave Nicholson, you exit via the door to the quad. The door is 40 inches wide and has a mass of 200 kg. You push the door with a perpendicular force of 52.61N exactly 0.86m away from the hinge. This generates the minimum torque, \tau_1, required to open the door. If you ...
*November 2, 2015*

**phyics**

a 1350 g projectile is launched with a force of 150N. the length f the firing arm is 1.25 m . determine the velocity
*October 27, 2015*

**algebra**

The mass of jupiter is about 1.900*10^24 metric tons.The mass of the sun is about 1.998*10^27 metric tons.about how many times the mass of jupiter is the mass of the sun?give answer in scientific notation.
*October 25, 2015*

**math**

two trains are at stations that are 800 miles apart. if they start traveling toward each other at the same time one averaging 67 mph and the other averaging 53 mph in how many hours will they pass each other?
*October 22, 2015*

**Math**

Write and graph an inequality for the daily number of calories that are recommended for a sedentary male. The graph shows Sedentary as: no more than 2200 calories.
*October 22, 2015*

**English**

That's another example in a different sentence in my essay. I already changed it , I need something to replace "doing lots"
*October 19, 2015*

**English**

Colloquial **
*October 19, 2015*

**English**

She doesn't want me to use that. For example she also said I had to change the word "handle " since it was colloquy a and I changed it to manage.
*October 19, 2015*

**English**

He is capable of doing lots with his physical ability but relies on the support of George in his life.
*October 19, 2015*

**English **

In my essay I wrote "doing lots" in a sentence and my teacher wrote me back feedback saying it was colloquial , how can I correct /change this and what can I use instead? Thanks :)
*October 19, 2015*

**Social Studies**

c. The Philippines Islands
*October 16, 2015*

**History**

Do some types of speech deserve more constitutional protection than others? If so, describe one (1) type that deserves the most protection and one (1) type that deserves the least.
*October 16, 2015*

**physics**

A person pushes a 16.5-kg shopping cart at a constant velocity for a distance of 36.6 m on a flat horizontal surface. She pushes in a direction 27.9 ° below the horizontal. A 48.1-N frictional force opposes the motion of the cart. (a) What is the magnitude of the force ...
*October 13, 2015*

**math**

Maria needed 5 gallons of gas to fill her car's gas tank. The mileage odometer read 34,300 miles. When the odometer read 34,528 Maria filled the tank with 12 gallons. At the end of the trip, she filled the tank with 17 gallons, and the odometer read 34,868 ...
*October 8, 2015*

**algebra**

please help!!
*October 8, 2015*

**algebra**

How would you convert the repeating nondeterminating decimal into a fraction? 0.151515...
*October 8, 2015*

**Math**

An executive committee consists of 11 members: 5 men and 6 women. 3 members are selected at random to attend a meeting in Hawaii. The names are drawn from a hat. What is the probability that all 3 selected are women? Thanks for the help
*October 8, 2015*

**Math**

Suppose you draw a card from an ordinary deck of playing cards What are the odds in favor of drawing a face card? b. What are the odds against drawing a face card?
*October 7, 2015*

**Chemistry**

How many moles of chloride ions are in 100mL of a 0.3molar solution of AlCl3? #moles Cl =(.3M AlCl3)(.1L)(105g/mol / 132g/m0l)
*October 6, 2015*

**Chemistry**

A 453 mL solution has a chloride concentration of 0.0253 M. This solution was prepared by adding solid FeCl3 to water. How many grams of FeCl3 are required?
*October 5, 2015*

**Math**

109-x=96 cannot figure out why 13 keeps coming up as the answer. Seems like you should be adding 109 to both sides; any help?
*October 1, 2015*

**Math**

1.8 divided into 5.0 is what answer? My answer is 2.7 with 7 continuing or with a remainder of 14
*September 30, 2015*

**Grade 12 Math **

At a certain marathon race, the winner comes in at a time of 130 minutes. Second place comes in at a time of 135 minutes, and third place comes in at 140 minutes. Starting with third place, contestants come in at regular intervals all the way up to the last successful finisher...
*September 29, 2015*

**Math**

Julio is making a bookcase with 5 shelves. Each shelf is to be 3/4 yard long. How much wood does Julio need for the shelves?
*September 29, 2015*

**Math **

At a certain marathon race, the winner comes in at a time of 130 minutes. Second place comes in at a time of 135 minutes, and third place comes in at 140 minutes. Starting with third place, contestants come in at regular intervals all the way up to the last successful finisher...
*September 29, 2015*

**Math**

PLEASE HELP ASAP!!! 1 rectangular prism has a base area of 120 square feet, a height of 12 feet per second and has dimensions of 84 inches, 6 feet, and 16 feet. Is the volume of the second more than or less than half that of the first? now explain
*September 27, 2015*

**physics - engine**

A car V8 has a bore of 4 in. and a stroke of 2.5 in., what is the engine size?
*September 26, 2015*

**history**

Andre was correct just took the test got 100% Thanks Andre!
*September 21, 2015*

**physics**

An elephant walks east for a distance of 58 km, then walks north for a distance of 16 km and finally north east at 300 for 15 km. Find the magnitude of the elephant’s total displacement in kilometers. now would i find the change in distance by subtracting numbers and the ...
*September 17, 2015*

**MATH**

GIVE ME AN EXAMPLE OF A MULTI-STEP NUMBER SENTENCE THAT INCLUDES EXPONENTS (THAT WOULD INVOLVE ORDER OF OPERATIONS AND INCLUDE AT LEAST THREE NUMBERS).
*September 13, 2015*

**history**

2 is c I took the test
*September 11, 2015*

**Physics ( using earth to find pressure of planet y**

3. A model of Earth’s interior: Look up the radius and mass of the Earth. Radius is 6,371 km Mass is 5.974 x 10^24 kg Calculate its average density. p_e = (5.974 x 10^24 kg)/ (4/3)pi r^3 = (5.974 x 10^24 kg)/ (4/3)pi (6371)^3 = 5.54 g/cm^3 Imagine a planet of the same ...
*September 10, 2015*

**physics**

A car moving at 120 km/h is 100 km behind a truck travelling at 80 km/h in the same direction. How many km does the car travel before it overtakes the truck?
*September 3, 2015*

**biochem**

The pKa of butanoic acid is 4.87. A student mixes 120 mL of 0.45 M butanoic acid with 50 mL of 0.3 M NaOH and adds water to give a final volume of 1 L. What is the pH of the final solution? Please show you work.
*August 31, 2015*

** AP economics **

Explain how each of the following people would talk about scarcity and trade-offs the president of the United States, the leader of a developing nation, a US citizen whose income is in the top 1% and US citizen whose income is in the bottom 5%
*August 26, 2015*

**PSY 202**

According to a 2011 report that is explained in our textbook, which of the following is one of the four overriding obstacles to gender equity in the workplace?
*August 26, 2015*

**algebra**

wright the slope-intercept formof the equation of each line given the slope and y- intercept slope=4/5, y-intercept=2
*August 19, 2015*

**Math 157**

Find the prime factorization of 33^5*39*25^12 Thanks!
*July 31, 2015*

**MTH 157**

Thank you!
*July 31, 2015*

**MTH 157**

A company will need $50,000 in five years for a new addition.To meet this goal the company deposits the money in an account today that pays 4% annual interest compounded quarterly. Find the amount that should be invested to total $50,000 in 5 years. Thanks for the help!
*July 31, 2015*

**Math**

What is the greatest prime you must consider to test whether 7356 is prime?
*July 26, 2015*

**psychology**

* Does life really start in prenatal development? * Who are the actual individuals involved in the prenatal stage of development?
*July 17, 2015*

**research paper**

am i doing it correctly ?? Importance & benefits of stretching & warm-up exercises: Warm-up is exercising at a lower intensity in order to get the blood circulating and let your body know that you are preparing for exercise. While Stretching is an exercise designed to extend ...
*July 13, 2015*

**research paper**

Can anyone help me in writing a research paper on the importance & benefits of stretching & warm-up exercises
*July 13, 2015*

**Statistics**

Thank you!!!!!
*July 9, 2015*

**Statistics**

Is my question to vague? I am an older college student struggling to do statistics with no algebra background!!
*July 9, 2015*

**Statistics**

Police stopped 527 drivers. Of those stopped, 298 were ticketed. Of those 298, exactly 127 were cited for more than one violation. Estimate the probability that a driver who was stopped got a ticket. Which way is the correct one? 1/527=.0018 or 1/298=.003 Or am I way off?
*July 9, 2015*

**Algebra**

Could someone just double check my work sqrt280x^6/sqrt7x I got 2x^3 sqrt10\sqrtx Also 1/5(30y+40)+2/3(9y-27)=18 I got 7/3
*July 9, 2015*

**Statistics**

If 67% of cars have automatic tranny's & 8 cars are selected at random what is the probability that fewer than 4 have an automatic tranny
*July 8, 2015*

**algebra**

Solve ln(x+8) + ln(x-8) =0.
*July 2, 2015*

**algebra**

Solve 14 - ln(2-x)=0. solve for x -ln(2-x)=-14 ln 1/(2-x)=-14 1=-14(2-x) 1=-28+14x 29=14x 29/14=x not sure where I'm going wrong
*July 1, 2015*

**algebra**

Solve 10* 2^{4 x -5} = 41 so 2^{4x-5}=41/10 ln 2 * {4x-5}= ln 41/10 ln 4.1 +5/ ln 2 not sure what I'm doing wrong Thanks
*July 1, 2015*

**math**

I have a question I would really appreciate the answer. If 15% of my grade is 74% and 96 is 15% of my grade and 40% of my grade is a 60.5% without the final counting for 30% what is my grade? Please help thank you.
*June 26, 2015*

**algebra**

Find all rational zeros of the polynomial function P(x)=x^4 + 2 x^3 - 13 x^2 + 4 x - 30. Enter the rational zeros in a comma separated list. If there are none, enter "none". -3| 1 2 -13 4 -30 -3 15 -6 30 1 -5 2 -10 0 so (x+3)(x^3-5x^2+2x-10 so 5| 1 -5 2 -10 5 0 10 1 ...
*June 23, 2015*

**algebra**

Find all zeros of the polynomial function P(x)=x^4 + 2 x^3 - x^2 - 2 x . If there is more than one zero write them separated by commas. x=
*June 23, 2015*

**Algebra**

Let f(x)=(x-3)^2(x - 9). The y-intercept is y= ?-81 or -15 The x-intercepts are x= ?0,3 The end behavior on the right is ?even so + (enter "+" for rises, "-" for falls) The end behavior on the left is ?positive so + (enter "+" for rises, "-&...
*June 20, 2015*

**algebra**

Solve | 4 x+ 4 | = 3. Enter your solutions in a comma-separated list. x = I came up with -1/4 which is wrong
*June 19, 2015*

**algebra**

Solve \sqrt{10-x} + x=8. Enter your solutions in a comma-separated list. I used the quadratic formula and ended up with-127+-(-215)/2
*June 19, 2015*

**algebra**

Solve 2 x^2 + 3 x - 6 = 0. The solutions are x_1 = and x_2 =
*June 16, 2015*

**Algebra**

In interval notation what is 20-|7x+1|>=6
*June 16, 2015*

**Algebra**

In interval notation what is |7-8x|<10
*June 16, 2015*

**Science**

Two 20.-newton forces act concurrently on an object. What angle between these forces will produce a resultant force with the greatest magnitude? (1) 0° (2) 45° (3) 90.° (4) 180.°
*June 12, 2015*

**physics**

If the force of the explosion was focused onto a smaller ___________ of the window, then the pressure of the explosion on the window would be even greater.
*June 11, 2015*

**Algebra**

Let \ f(x) = 16 - x^2. Compute the average rate of change of f(x) on each interval. (a) [0,2] (b) [2,4] (c) [0,4]
*June 9, 2015*

**Algebra**

The equation of the line that goes through the point ( 2, 5 ) and is parallel to the line going through the points ( -2 ,4 ) and ( 6 ,2 ) can be written in slope-intercept form y = mx+b with: m = b =
*June 9, 2015*

**Algebra**

An equation of a line through (-3, -6) which is perpendicular to the line y=-5 x +3 has slope: I know the slope is 1/5 having problem with y-intercept is
*June 9, 2015*

**algebra**

What is x/(x-5)-3=5/(x-5) I came up with 5 but that is undefined
*June 8, 2015*

**Algebra**

Use the above graph of f(x) to complete the following table for values of its inverse function, f^{-1}(x). The graph has a point on (2,2)the y-intercept is 4 the x intercept is 3 x =-4, 8, 0, -2, 2 f^{-1}(x) Note: You can earn partial credit on this problem...
*June 7, 2015*

**algebra**

if f(x)=10x+7/6x+3 what is the f inverse
*June 7, 2015*

**algebra**

if f(x)=square root of x-4 what is f inverse I came up with x^2+16
*June 7, 2015*

**Chemistry 12**

I thought we only add the first two because the first one was purposely overshot? 0.5M NaOH × 12.56666667= 6.283333333 =6.3 moles Thank you for replying!
*June 2, 2015*

**Chemistry 12**

Hi, I did the acid-base titration lab with HCl and 0.5M NaOH. I need to calculate the moles of NaOH from molarity of NaOH and the average volume used. My English isn't good but is it asking me to find the moles of NaOH using the molarity of NaOH and the average volume used...
*June 2, 2015*

**Science**

A plane is flying horizontally with speed 215 m/s at a height 2770 m above the ground, when a package is dropped from the plane. The acceleration of gravity is 9.8 m/s^2. Neglecting air resistance, when the package hits the ground, the plane will be _________. Can anyone ...
*June 1, 2015*

**Algebra**

If(x)=4*absolute value of x-7 what is f(x+1)I have tried many ways and do not understand what to do with the x+1.
*May 29, 2015*

**science**

What happens when a warm humid air mass meets a cold dry mass?
*May 27, 2015*