Sunday

December 21, 2014

December 21, 2014

Total # Posts: 3,062

**chemistry**

Electronegativity is a concept that is useful along with other concepts in predicting the polarity of a bond deciding how many electrons are involved in a bond formulating a statement of the octet rule determining the charge on a polyatomic ion
*February 23, 2014*

**Chemistry**

which of the following sets of elements is arranged in order of decresing electronegativity? O,S,As Cl, B, CL Br, Cl, P Be, C, O please explain correct answer
*February 23, 2014*

**chemistry**

what is the geometry of the molecular compound formed by the reaction of sulfur with hydrogen? linear angular trigonal planar tetrahedral please explain the correct answer
*February 23, 2014*

**chemistry**

VSEPR theory predicts that the geometry of AsH3 molecule is which of the following. linear trigonal planar trigonal pyramidal tetrahedral please explain the correct answer
*February 23, 2014*

**math**

convert 20 pounds to kilograms then round to the nearest tenth
*February 23, 2014*

**american government**

McCulloch v Maryland is an important case because it was one of the cases whereby the Supreme Court (Points : 1) asserted the supreme authority of Congress. asserted national authority over the states. upheld states’ rights. affirmed Maryland’s right to tax national...
*February 21, 2014*

**american government**

In Gibbons v. Ogden, the Supreme Court held that (Points : 1) states’ rights to regulate may not trample on powers specifically reserved for Congress. states’ rights supersede national authority. the national government does not have interstate commerce authority. ...
*February 21, 2014*

**advanced functions**

=the height in metres of a weather ballon above the ground after t seconds can be modelled by the function h(t)=-2t^3+3t^2+149, for 0<t<10. when is the ballon exactly 980 m above the ground?
*February 20, 2014*

**Math**

A killer whale has eaten 75 pounds of fish today. It needs to eat at least 140 pounds of fish each day. A bucket holds 15 pounds of fish. Write and solve an inequality that represents how many more buckets of fish the whale needs to eat?
*February 20, 2014*

**Chemistry URGENT**

Please show how N and O are combined to make NO^+2 in Lewis dot structure. I'm having a hard time. Thanks
*February 19, 2014*

**Chemistry**

three separate questions 1. An empty graduated cylinder weighs 82.450 g. When filled to 50.0 mL, with an unknown liquid it weighs 110.810 g. What is the density of the unknown liquid? 2. It is valuable to know that 1 milliliter (mL) equals 1 cubic centimeter (cm^3) or cc.). ...
*February 11, 2014*

**Economics**

It takes a phlebotomist 15 minutes to complete a blood draw. The supplies for each draw cost $4, and the phlebotomist earns $20 per hour. The phlebotomy lab is designed to accommodate 20,000 draws per year. What are the average and incremental costs of a blood draw when the ...
*February 10, 2014*

**statistics**

Provide the Z score and the critical value. Raw score of 112, population mean 89, Std. of the population (22.8)
*February 10, 2014*

**statistics**

The test scores of students in a class test have a mean of 65 and with a standard deviation of 8. What is the probable percentage of students scored more than 70?
*February 10, 2014*

**chemistry**

In which of the following pairs of compounds are both members of the pair ionic compounds? Explain a. Pl3 and HBr b. H2S and NCl3 c. LiF and H20 d. LiI and NiO DrBob222 you said you would choose the answer d and I should know how to figure this out. I don't understand the ...
*February 9, 2014*

**chemistry**

the correct formula for the ionic compound containing Tl^3+ and Te^2- ions would be: a. TlTe b. Tl3Te2 c. Tl2Te3 d. Tl2Te
*February 9, 2014*

**Chemistry**

6 separate questions. I have figured out the other 20 questions I am stuck. Please help Thanks The correct name for the ionic compound Al2Se3 is? The correct name for the ionic compound Fe2Se3 is? the Roman numerall III in the name Iron(III)oxice indicates what? Which of the ...
*February 9, 2014*

**chemistry**

In which of the following pairs of compounds are both members of the pair ionic compounds? Explain a. Pl3 and HBr b. H2S and NCl3 c. LiF and H20 d. LiI and NiO
*February 9, 2014*

**chemistry**

the correct formula for the ionic compound containing Tl^3+ and Te^2- ions would be: Please show. thank you
*February 9, 2014*

**Healthcare Economics**

Your president bought two acres of land for $200,000 ten years ago. Although it is zoned for commercial use, it currently houses eight small, single-family houses. A property management fir that wants to continue leasing the eight houses has offered you $400,000 for the ...
*February 8, 2014*

**math**

a train leave Chicago at a 115 miles per hour towards Denver another train leaves Denver 105 miles per hour towards Chicago if the distance between the two cities is 1200 miles how long would it take before the two trains meet?
*February 7, 2014*

**calculus**

If limit as delta x approaches 0 of tan(0+Δx)-tan(0)/Δx =1 which of the following is false: d/dx [tanx]=1 the slope of y = tan(x) at x = 0 is 1 y = tan(x) is continuous at x = 0 y = tan(x) is differentiable at x = 0
*February 6, 2014*

**calculus**

Suppose h(x) = f (g(x)) and the graphs of f and g are shown below. Describe the continuity of h at x = 0. how would you do this if you were given two graphs: F--- discontinuity at -2,0; point at -1,1; and point at 0,0 (to make a parabola) then discontinuity at 0,-1; and then ...
*February 6, 2014*

**clalc**

and the answer options are h is continuous at x = 0. h is discontinuous at x = 0 since h(0) is undefined. h is discontinuous at x = 0 since the limit of h(x) as x approaches 0 does not exist h is discontinuous at x = 0 since the limit of h(x) as x approaches 0 does not equal 0
*February 6, 2014*

**clalc**

Suppose h(x) = f (g(x)) and the graphs of f and g are shown below. Describe the continuity of h at x = 0. how would you do this if you were given two graphs: F--- discontinuity at -2,0; point at -1,1; and point at 0,0 (to make a parabola) then discontinuity at 0,-1; and then ...
*February 6, 2014*

**calculus**

Which of the following best describes the limit as x approaches 4 of the quotient of 2 times x divided by the quantity negative 2 plus square root of x ? It exists and equals 4 It fails to exist because it is unbounded. It fails to exist because its one-sided limits are not ...
*February 5, 2014*

**chemistry**

6 part question 1. describe the appearance of a Bunsen flame that is getting insufficient air? 2. describe the appearance of a Bunsen flame that is getting too much air. 3. When inserting glass tubing into a rubber stopper, how far from the stopper should you hold the tubing? ...
*February 5, 2014*

**chemistry**

Two naturally occurring isotopes exist for the hypothetical element dippium. 25.0 percent of dippium atoms have a relative mass of 17.0 amu and 75.0 percent a relative mass of 21.3 amu. What is the atomic mass of dippium? Please show the work thanks
*February 4, 2014*

**Physics **

An airplane moves away from a stationary observer at 125 m/s and emits a frequency of 595 Hz on a day where the temperature is 25.0°C. What frequency does the observer hear?
*February 3, 2014*

**CHEMISTRY**

The grams of protein in 1 cup of soup that has 110 Cal{\rm Cal} with 7 g{\rm g} of fat and 9 g{\rm g} of carbohydrate. Express your answer using one significant figure.
*February 1, 2014*

**Science**

A 15.3 kg object is dropped from an initial height of 33.5m above the ground. Find the speed when it hits the ground.
*January 28, 2014*

**Finance**

Kim Davis is in the 40% personal tax bracket. She is considering investing in HCA (taxable) bonds that carry a 12% interest rate. a. What is her after-tax yield (interest rate) on the bonds? b. Suppose Twin Cities Memorial has issued tax exempt bonds that have an interest rate...
*January 27, 2014*

**ashford**

All of the following are true of what typically occurs when first meeting someone EXCEPT: (Points : 1) First impressions are based mostly on facial appearance. We form our impressions of others within less than a second of meeting them. We form conclusions about a person’...
*January 25, 2014*

**math**

A car company charges $35 per day plus 20 cents per mile to rent a car. Write an equation to express the average cost per x mile.
*January 24, 2014*

**math**

Find a function that models weekly profit in terms of price per feeder.
*January 23, 2014*

**Chemistry**

Hey can anyone help me solve these questions 1. Balance K2Cr2O7 +H2C2O42H2O --> K[Cr(CrC2O4)2(H2O)2]2H2O +CO2+ H2O 2. Calculate the theoretical yield of the reaction mentioned above 3.What is the theoretical percentage by weight of Cr in the reaction mentioned above 4. Why ...
*January 17, 2014*

**Physics**

A cubical block of wood 0.100 m on a side and with a density 550 kg/m^3 of floats in a jar of water. Oil with a density of 750 kg/m^3 is poured on the water until the top of the oil layer is 0.035 m below the top of the block. 1. How deep is the oil layer? Please tell me the ...
*January 17, 2014*

**Integral Calculus**

A jeepney's velocity over time in ft/sec as it moves along the x-axis is governed by the function v(t)=3t^2-10t+15. If the jeep's position at t= 1 second is 8ft, what is the total displacement made by the jeepney from t=0 to t=5sec? please I need help, i just need the ...
*January 12, 2014*

**physics**

A satellite is placed in orbit 100 km above the surface of the earth (radius = 6370 km, mass = 5.98 x 1024 kg). What is the value of the acceleration of gravity at that altitude as a percentage of the acceleration at the surface of the earth?
*January 10, 2014*

**Physics Please check my answer**

Thank You!
*January 10, 2014*

**Physics Please check my answer**

How much work is done by the centripetal force (in this case, the friction between the tires and the road) on a 1200 kg car moving on a circular track of radius 50 meters at a constant speed of 31.4 m/s? A. 7.4 • 10^6 J B. 19.7 J <--- C. 2136.7 J D. 117,600 J E. 0 J
*January 10, 2014*

**scice help!?!?!?!**

11. D 12. I believe that this one is either D or B. I'm pretty sure this one is D too, though.
*January 10, 2014*

**Physics**

A billiard ball traveling at 6.25 m/s collides with a second stationary ball of equal size and shape causing the second ball to move at an angle of 25º with respect to the horizontal at a speed of 3.0 m/s.Both balls have a mass of .210kg. What is the impulse of both balls...
*January 10, 2014*

**Physics**

I really need help with this problem. A billiard ball traveling at 6.25 m/s collides with a second stationary ball of equal size and shape causing the second ball to move at an angle of 25º with respect to the horizontal at a speed of 3.0 m/s.Both balls have a mass of ....
*January 4, 2014*

**Physics **

A billiard ball traveling at 6.25 m/s collides with a second stationary ball of equal size and shape causing the second ball to move at an angle of 25º with respect to the horizontal at a speed of 3.0 m/s.Both balls have a mass of .210kg. What is the impulse of both balls...
*January 4, 2014*

**MATH**

Owen has 20% more marbles than Danny. Danny has 40% less marbles than Connie. Owen has 21 marbles less than Connie. How many marbles does Danny have?
*December 30, 2013*

**math**

A tank contains 4L of water at first. Tap A is turned on and water from tap A flows into the container at the rate of 8L per minute. After 3 minutes, Tap B is turned on. Both taps are turned off together after another 5 minutes. If the total amount of water in the container is...
*December 30, 2013*

**SENTENCE SKILLS**

B
*December 17, 2013*

**Math**

Recall that the equation for the horizontal distance h in feet of a projectile with initial velocity v0 and initial angle theta is given by h=v0^2/16 sin theta cos theta . a. Assume the initial velocity is 60 ft/second. What initial angle will you need to ensure that the ...
*December 6, 2013*

**Ashford**

According to to scholars what is one way the advent of talking pictures changed the behavior of movie audiences
*December 1, 2013*

**Astride university**

What is the correct technical name for the music that plays in the background of a scene while the action takes place
*December 1, 2013*

**finance**

Find the amount of periodic payment necessary for the deposit to a sinking fund: A=50,000 n=semiannually , r=13%, t=15 yrs.
*November 23, 2013*

**Statistics**

Many dairy cows now receive injections of BST, a hormone intended to spur greater milk production. A group of 53 Jersey cows increased average milk production from 43 to 52 pounds per day, with a standard deviation of 4.8 lbs. Is this evidence that the hormone maybe effective ...
*November 21, 2013*

**Statistics**

If the cases selected for one sample have no influence upon the cases selected for a second sample, then the samples are said to be: A) independent B) inconsistent C) dependent D) consistent A
*November 21, 2013*

**math**

I got it wrong. I don't understand why.
*November 21, 2013*

**math**

I have a question I have been working on since yesterday and I am not making this up. I couldn't get the right answer. If sin theta = -2/3, which of the following are possible? A: cos theta= -the sqr rt of 5/3 and tan theta =2/3. B: sec theta = 3/the sqr rt of 5 and tan ...
*November 21, 2013*

**Intro to trigonometry**

sorry I forgot to put my name.
*November 20, 2013*

**Intro to trigonometry **

If sin(theta) < 0 and tan(theta) > 0 then: in degrees. Ok I need help with this I couldn't understand the lesson and want to know how to do problems like this. Please help me by showing me step by step! Thank u in advance.
*November 20, 2013*

**chemistry**

if the %m/m of a solution of NaCl is 22%, how may grams of NaCl are present in 250g of solution?
*November 19, 2013*

**Pre-Calc**

A wrecking ball attached to a crane swings back and forth. The distance that the ball moves to the left and right of its resting position with respect to time is represented by the following graph.
*November 15, 2013*

**Social Studies**

WWI: Why would the Canadiens( Francophone) and the Maritime provinces be less interested in going to war in Europe than those Canadians of British heritage?
*November 14, 2013*

**math**

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 4.9 * 10^2 µm. Find this earthquake's magnitude.
*November 11, 2013*

**algebra**

The atmospheric pressure P in pounds per square inch (psi) is given by P = 14.7 e^−0.21 a where a is the altitude above sea level (in miles). If a city has an atmospheric pressure of 12.17 psi, what is its altitude?
*November 11, 2013*

**Stat**

A bank is testing a new method for getting delinquent customers to pay their past-due credit card bills. The standard way was to send a letter (costing about $0.45) asking the customer to pay. That worked 30% of the time. The bank wants to test a new method that involves ...
*November 11, 2013*

**algebra**

Find the number of decibels for the power of the sound given. Round to the nearest decibel. A rocket engine, 2.42 * 10^5 watts cm^2 what is the db?
*November 11, 2013*

**math**

solve: 2 ln e= ln sqrt of 7/x-2 ln e what would be x?
*November 11, 2013*

**algebra 2 Please help**

8x/6y divide by 2x/3y
*November 10, 2013*

**math**

2 ln e = ln sq rt. 7/x-2 ln e
*November 10, 2013*

**math**

is the answer 933?
*November 10, 2013*

**math**

An advertising agency conducted a survey and found that the number of units sold, N, is related to the amount a spent on advertising (in dollars) by the following formula: N = 1,500 + 300 ln a (a ≥ 1) How many units are sold after spending $1,000?
*November 10, 2013*

**math**

Bob has 22 stamps. this is 6 times as many as Joe has. Bob makes a model to compare the number of stamps they have
*November 9, 2013*

**algebra 2 help please would appreciate **

4/x+5/y divide 3/x+7/y simplify complex fraction thank you show work
*November 9, 2013*

**algebra 2 help please would appreciate **

3+(2x/x+4) divide x/x+4 please simplify the complex fraction thank you show work
*November 9, 2013*

**Algebra 2 help please would appreciate **

8x/6y divide 2x/3y simply fraction show work thank you
*November 9, 2013*

**ALGEBRA 2 help please would appreciate **

find the exact value for cosine and sine of 2,1oo degree thanks
*November 8, 2013*

**math**

please help to solve tie exponential equation for x: 5^x=8
*November 7, 2013*

**Math 5th grade**

I still don't understand which one have exactly 3 factors in common with the number 12. Can you please explain?
*November 4, 2013*

**Math 5th grade**

Can you help me solve the problem? Use number bank to solve. Number Bank is 42, 14, 16, 24, 84. 1. I have exactly 3 factors in common with the number 12. 2. I have exactly 2 factors in common with the number 12.
*November 4, 2013*

**Statistics Problems**

The bank sets up an experiment to test the effectiveness of the DVD. The mail it out to a random sample of delinquent customers and keep track of how many actually do contact the bank to arrange payments. The bank's statistician calculates a p-value (probability-value) of ...
*November 3, 2013*

**Medical Billing and Coding**

The patient was admitted with increasing shortness of breath, weakness, and nonproductive cough. Treatment included oxygen therapy. Final diagnoses listed as acute respiratory insufficiency and acute exacerbation of chronic obstructive pulmonary disease (COPD). Which of the ...
*November 1, 2013*

**Medical Billing and Coding**

This is a 71-year-old female admitted with a complaint of right-sided weakness. She denies any fever, shortness of breath, cough, headaches, or chest pain. Patient has NIDDM, controlled by diet. Patient currently smokes. Mild right-sided paralysis was found on physical ...
*November 1, 2013*

**Medical Billing and Coding**

This 65-year-old chronic cigarette smoker for the past 40 years was admitted to the hospital with acute exacerbation of her chronic obstructive pulmonary disease. She has a hsitory of anxiety syndrome due to hypothyroidism, and is maintained on medications for both the anxiety...
*November 1, 2013*

**Medical Billing and Coding**

The patient was brought to the ER and then admitted because of acute alcohol inebriation. The diagnosis is acute and chronic alcoholism, continuous. What codes are assigned? ICD-9-CM Diagnosis Code(s) with POA Indicator:________________________ ICD-10-CM Code(s):________________
*November 1, 2013*

**ALGEBRA 2 help please would appreciate **

for the equation -4x-8y^2=0,give the focus and directrix.then sketch the graph, showing both the focus and the directrix. please show all the step thank you.
*October 30, 2013*

**alGEBRA 2 help please would appreciate **

for the equation -4x-8y^2=0,give the focus and directrix.then sketch the graph, showing both the focus and the directrix. please show all the step thank you.
*October 30, 2013*

**alGEBRA 2 help please would appreciate **

graph 36x^2-900=25y^2 show the step please
*October 28, 2013*

**alGEBRA 2 help please would appreciate **

find the foci of 9x^2-25y^2=225 I get this far a^2=5 and B^2=3 AND I KNOW I HAVE TO USE THE formula c^2=a^2-b^2 i don't know what to do now if add it i get c^2=34 please help show the step thanks
*October 28, 2013*

**scial studies**

In countries that are predominantly Muslim, the
*October 28, 2013*

**Psychology/Ms Sue**

Ms Sue, please check my answers? 1. Overall drug use among adolescents has decreased in the U.S since 1976? False 2. Tobacco is the only drug category used more by 8th graders than 12th graders? False 3. The high rate of adolescent crime is caused by a few very active ...
*October 27, 2013*

**English**

( IS MY ANSWER CORRECT ? ) Read the following Papago song. Identify it's purpose. No talking, no talking. The snow is falling. And the wind seems to be blowing backward. ( 1 point ) A.) to inform B.) to persuade * C.) to analyze D.) to express
*October 25, 2013*

**Early American and Colonial Literature**

Matching Match the letter of the author with his or her description. Not all letters will be used. A. William Bradford B. Captain John Smith C. Anne Bradstreet D. Olaudah Equiano E. Thomas Paine F. Thomas Jefferson 1.) " I wrote an account of my voyage across the sea on ...
*October 25, 2013*

**math**

How do i write 4*36 in an array and find partial products.
*October 23, 2013*

**juvenile justice **

17 letter word that means accepting the criminal label
*October 22, 2013*

**Chemistry**

would the calculated molar volume be larger, smaller or unchanged. a. the partial pressure of water was not taken into account
*October 20, 2013*

**Psychology/ Ms Sue**

Please check my answers 1. During puberty, boys testosterone production increases up to 5 times the level in childhood? True 2. Babies of teenagers have a higher risk of birth complications? True 3. Most STIs are fatal if not treated properly? False 4. Analytic thinking and ...
*October 20, 2013*

**math**

Simplify the expression. 5(x − 1) − 3(x2 + 4x + 5) − 8(x + 7) Classify the answer by number of terms and degree. 1st-degree monomial 1st-degree binomial 1st-degree trinomial 2nd-degree binomial 2nd-degree trinomial
*October 19, 2013*

**math**

Simplify the expression. (2x − 1)(x2 + 3x − 3)
*October 19, 2013*

**math**

(x + 6y − 5z) − (x − 2y + 4z) Classify the answer by number of terms and degree. 1st-degree monomial 1st-degree binomial 1st-degree trinomial 2nd-degree binomial 2nd-degree trinomial
*October 19, 2013*

**math**

You and your friend are saving for college. You have $50 and are added $10 each week to your savings. Your friend has $20 and he is adding $20 each week to his savings. a. what system of equations would be a good model for this situation? Let x be number of weeks and y be the ...
*October 18, 2013*

**Statistics**

So, how would I figure out the standard deviation of 61.4?
*October 17, 2013*

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