Tuesday
July 22, 2014

Posts by Lisa


Total # Posts: 2,966

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

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.). Ho...

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 vo...

statistics
Provide the Z score and the critical value. Raw score of 112, population mean 89, Std. of the population (22.8)

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?

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 ...

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

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 f...

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

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

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 proper...

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?

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

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 c...

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

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 c...

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 eq...

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? ...

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

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?

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.

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.

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...

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’...

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.

math
Find a function that models weekly profit in terms of price per feeder.

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 ...

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 i...

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 ...

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?

Physics Please check my answer
Thank You!

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

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.

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...

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 .21...

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...

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?

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...

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 horiz...

Ashford
According to to scholars what is one way the advent of talking pictures changed the behavior of movie audiences

Astride university
What is the correct technical name for the music that plays in the background of a scene while the action takes place

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.

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 ...

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

math
I got it wrong. I don't understand why.

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 te...

Intro to trigonometry
sorry I forgot to put my name.

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.

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

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.

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?

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.

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?

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 send...

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?

math
solve: 2 ln e= ln sqrt of 7/x-2 ln e what would be x?

algebra 2 Please help
8x/6y divide by 2x/3y

math
2 ln e = ln sq rt. 7/x-2 ln e

math
is the answer 933?

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?

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

algebra 2 help please would appreciate
4/x+5/y divide 3/x+7/y simplify complex fraction thank you show work

algebra 2 help please would appreciate
3+(2x/x+4) divide x/x+4 please simplify the complex fraction thank you show work

Algebra 2 help please would appreciate
8x/6y divide 2x/3y simply fraction show work thank you

ALGEBRA 2 help please would appreciate
find the exact value for cosine and sine of 2,1oo degree thanks

math
please help to solve tie exponential equation for x: 5^x=8

Math 5th grade
I still don't understand which one have exactly 3 factors in common with the number 12. Can you please explain?

Math 5th grade
I still don't understand which one have exactly 3 factors in common with the number 12. Can you please explain?

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.

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 ...

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 fo...

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 examina...

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...

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):________________

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.

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.

alGEBRA 2 help please would appreciate
graph 36x^2-900=25y^2 show the step please

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

scial studies
In countries that are predominantly Muslim, the

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 delinque...

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

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 t...

math
How do i write 4*36 in an array and find partial products.

juvenile justice
17 letter word that means accepting the criminal label

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

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 in...

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

math
Simplify the expression. (2x − 1)(x2 + 3x − 3)

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

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 ...

Statistics
So, how would I figure out the standard deviation of 61.4?

Statistics
What is the mean and standard deviation of 63.7%? What is the mean and standard deviation of 61.4%? Using the 68-95-99.7 rule, describe the sampling distribution of 63.7% Using the 68-95-99.7 rule, describe the sampling distribution of 61.4%? Please help I am so lost...

Statistics
What is the mean and standard deviation of 63.7%? What is the mean and standard deviation of 61.4%? Using the 68-95-99.7 rule, describe the sampling distribution of 63.7% Using the 68-95-99.7 rule, describe the sampling distribution of 61.4%? Please help I am so lost...

computer
why do you think this is?

computer
what is the least difficult microsoft office component to learn? what is the most difficult?

computers
I learned that the website provided 30 day free trial so I learned step by step how to download it first. I just didn't know what it meant by components I got it now ,but thanks

computers
can someone help me anser this question on installing microsoft--- Describe an experience installing the Microsoft Office Suite software. Note: If the software is already preinstalled, take a look at where the software is installed and list the components that are included in ...

geometry A please help
given <A compl to <B <C is compl to <B <A=(3x+y) <B=(x+4y+2) <C=(3y-3) find the measure of all 3 angles show all work please I dont know how to do it thank yu

Business Finance
A bond that has a $1,000 par value (face value) and a contract or coupon interest rate of 10.6%. The bonds have a current market value of $1,125 and will mature in 10 years. The firm's marginal rate is 34%.

math
yes thank you Steve

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