Saturday

August 30, 2014

August 30, 2014

Total # Posts: 232

**chemistry**

Sodium metal is immersed into graduated cylinder that holds exactly 32.5 ml. The sodium metal used to fill the cylinder weighs 405.5 grams. Calculate the density of sodium based on the given data.
*July 27, 2014*

**calculating statistical data**

last month, the release of information specialist received 232 requests for information. he was able to answer 176 within the specified time frame of five working days. what is the rate of compliance in the answering requests within the specified time frame? round to two ...
*July 23, 2014*

**calculating statistical data**

all the patients who present to the emergency service department with a suspected acute myocardial infraction (AMI) are expected to receive an EKG within 10 minutes if their arrival. of the 56 patients who had a suspected AMI during the last quarter, 32 has an EKG within the ...
*July 23, 2014*

**calculating statistical data**

what is the percent of variance for each item listed in the him department budget shown in the table below? round to two decimal points.
*July 23, 2014*

**calculating statistical data**

you currently lease scanning equipment at a cost of 1500 per quarter and two copy machine at $120 each per month. what will you need to budget annually for this leased equipment?
*July 23, 2014*

**calculating statistical data**

the forms used in your coding area cost 100.00 per 1000 forms for the first 2000 and $50 for every 1000 thereafter. if you need to order 5000 forms what is the total cost?
*July 23, 2014*

**calculating statistical data**

the same supervisor in #9 agreed to increase the salary of the employee to 13.00 per hour once she passed her RHIT exam. three months after beginning her employment, the employee passed her RHIY exam. what will the new budget be for salary and fringe benefits?
*July 23, 2014*

**calculating statistical data**

the him coding supervisor over the coding section agrees to pay a new graduate 11.00 per hour. this a full time coding position at 2080 hours per year. the cost for a full time employee's fringe benefits is 24 percent of the employee's salary. how much must the ...
*July 23, 2014*

**calculating statistical data**

the him department at the community hospital will experience a 15 percent increase in the number of discharges coded per day as the result of opening a cardiac clinic in the facility. the 15 percent increase in projected to be 100 additional records per day. the standard time ...
*July 23, 2014*

**calculating statistical data**

a coding supervisor must determine the number of full time equivalents (FTES) needed to code 500 discharges per week. if it takes an average of 20 minutes to code each record and each coder works 7.5 productive hours per day, how many FTES will the coding supervisor need?
*July 23, 2014*

**calculating statistical data**

it takes approximately 15 minutes to code one record. How many personnel hours would be needed to code 1424 discharges for the month?
*July 23, 2014*

**calculating statistical data**

an employee currently earning 10,85 per hour has been awarded a 3.5 percent merit raise. ehat will the employee's hourly salary be with this increase?
*July 23, 2014*

**calculating statistical data**

after one month of operation, the health information services at Community Health Center determined that there were two records misfiled out of the 450 active records. What is the filing accuaracy rate for this area? round to one decimal points
*July 23, 2014*

**calculating statistical data**

community health center, a new patient clinic in your town serving only underinsured and uninsured patients, has asked you to help its him department get started. calculated the number of new shelving units needed for medical record filing system based on 8 shelves per unit at...
*July 23, 2014*

**calculating statistical data**

of the 5352, requests for medical records in the question above, 4257 were located within the 20 minute time frame established by the supervisor as a quality improvement indicator. what is the rate of compliance in anawering requests for records? round to 2 decimal points.
*July 23, 2014*

**Statistics**

if your him department has 100,000 active medical records and you received 5352 request for records within a 6 month period, what is the request rate for the past 6 months? round to 2 decimal points.
*July 23, 2014*

**algebra**

Simplify the exponential expression [-10x13y^12]^0 ---------------- 2x^9y^3
*July 6, 2014*

**Math**

I am sorry I didn't complete the problem Here is the question: Doris invested some money at 7% and some money at 8%. She invested $6,000 more at 8% than she did at 7%. Her yearly total from the two investments was $7.80. How much did Doris invest at each rate? (A)$2,000 ...
*July 1, 2014*

**Math**

Four cheeseburgers and five milkshakes cost a total of $25.50. Two milkshakes cost $1.75 more than one cheeseburger, and also find the cost of a milkshake. (A)$3.25 for a cheeseburger and $250 for a milkshake. (B)$3 for a cheeseburger and $2.90 for a milkshake. (c) $ 4.15 for ...
*July 1, 2014*

**Math**

Doris invested some money at 7% and some money at 8%. She did at 7%. Her yearly total from the two investments was $7.80. How much did Doris invest at each rate?
*July 1, 2014*

**math**

If tree is broken 18 feet from its base. The top lands 24 feet from the base. How tall is the tree?
*April 22, 2014*

**physics**

Consider a toy car that you pullback to make it go forward. Is it a force multiplier or a distance multiplier? Defend your answer with the observations you could make
*March 24, 2014*

**Physics**

You pull a sled across a horizontal frictionless patch of snow. If your pulling force is in the same direction as the sled's displacement and increases the kinetic energy of the sled by 34%, by what percentage would the sled's kinetic energy increase if the pulling ...
*March 21, 2014*

**calculus**

At a summer campfire, the radius of a marshmallow on a stick expands at the rate of \ {r ' (t)} = \frac{2.4 }{3 t + 6} mm/s where t is the time of heating in seconds. Initially the radius was 3.8 mm. Find the radius after 16 seconds using the following steps: When ...
*March 8, 2014*

**Chemistry**

aluminum reacts with sulfuric acid to produce aluminum sulfate and hydrogen gas. how many grams of aluminum sulfate would be formed if 250 g H2SO4 completly reacted with aluminum
*February 23, 2014*

**Physics**

A running track consists of two straight 88.5m segments and two semicircles of radius 39.0m The distance a runner travels in one complete lap I calculated to be 422 m. How do you find the displacement in x.y of a runner who covers half a lap?
*February 4, 2014*

**Physics**

Meteorologists track a storm using radar. The radar shows a storm centered 30km west of town. Ninety minutes later, it's 30km north of town. Let the +x-axis point east and the +y-axis north. Assuming the storm moved with constant velocity, find that velocity.
*February 4, 2014*

**English Grammar**

Sorry about the typos. It should've read: They were questions submitted by others. I have to be sure to triple check before posting.
*November 7, 2013*

**English Grammar**

Thank you. I agree that the sentences are a bit childish. I didn't choose the wording of each sentence. They were the were questions submitted by others. I merely needed to choose the one that is grammatically correct. I just wanted a second opinion.
*November 7, 2013*

**English Grammar**

Which sentence uses proper grammar? I'm bored by math class. Or I'm bored of math class.
*November 7, 2013*

**Algebra Help**

Factor: 49^2+112r+64 =
*October 11, 2013*

**Chemistry**

Many portable gas heaters and grills use propane, C3H8(g). Using enthalpies of formation, calculate the quantity of heat produced when 15.0g of propane is completely combusted in air under standard conditions. Assume that liquid water is forming.
*October 4, 2013*

**finite math**

...
*September 9, 2013*

**finite math**

ukukukukkuk
*September 9, 2013*

**finite math**

rfhffjfjehehbejfejfhejfjejf
*September 9, 2013*

**MIT 2.01X**

HW7_1B_1 : Mmax+=4000
*June 23, 2013*

**Physics**

HW5_4_1_b : ´-Q_2 :
*May 28, 2013*

**Physics**

HW5_4_1_b : ´Q_2 :
*May 28, 2013*

**Physics**

HW5_1_1 : 15.0 points -7 -17 HW5_1_2 : 15.0 points -3 8 HW5_2_1 : 20.0 points 1600 5600 11600 -11600 HW5_3 : 30.0 points 3.2 HW5_4_2 : 5.0 points 7 HW5_4_3 : 5.0 points -1
*May 28, 2013*

**Engineering**

Q1_2_3 (25/12*W*H)/A_0*E_0
*May 23, 2013*

**Engineering**

Q1_2 _1 400 500 699.99 665.68
*May 23, 2013*

**Chemistry**

Turns out all the values were right such as .02505 M and 35.45 g Cl etc, I just didn't need to multiply by 1000 and leave it in grams as you said.
*April 26, 2013*

**Chemistry**

To illustrate the calculation, assume that 21.95 mL of a thiosulfate solution is required to reduce the iodine liberated by 20.85 mL of 0.0200M KIO3 and that 18.63 mL of the same thiosulfate solution reacts with the iodine replaced by 20.00 mL of an unknown solution of sodium ...
*April 26, 2013*

**Chemistry **

Which of the following result in buffered solutions when equal volumes of the two solutions are mixed? a.) .1 M HCl and .1 M NH4Cl b) .1 M HCl and .1 M NH3 c.) .2 HCl and .1 M NH3 d.) .1 M HCl and .2 M NH3 By def. I know that a buffed solution is made from a weak base and it&#...
*April 9, 2013*

**Chemistry **

The question is: what is the ratio [NH3/[NH4+] in an ammonia/ammonium chloride buffer solution with pH= 10.00? (pKa for ammonia=9.25) When working the problem, I tried to solve it a bit backwards, in that I plugged in each of the multiple choices I was given to see which would...
*April 9, 2013*

**Chemistry **

What is the pH of a 0.1 M NaOCl solution (Ka of HOCl is 2.95 x10-8) I did: x squared/.10= 2.95x10-8 x squared= 2.95x10-9 x= 5.43x10-5 -log(5.43x10-5)= 4.27 pH However, the options I'm given are either a.) 3.74 b.) 6.47 c.) 8.23 d.) 10.27 What steps am I doing wrong?
*April 8, 2013*

**Chemistry **

First, the question I'm given is: What is the pH of a 1.0 L solution containing 0.25M acetic acid and 0.75M sodium acetate ( Ka for acetic acid= 1.8x 10-5) So I took the -log(1.8x10-5)= 4.74+log(.75/.25)= 5.22 pH But then I'm asked if .050 mol NaOH is added to the ...
*April 8, 2013*

**Chemistry **

The indicator bromocresol green (HIn) can be in two different forms: As HIn the color of the indicator is yellow, an In the color of the indicator is blue, and an equilmolar mixture of the two species is green. The Ka of the indicator is 2.5 x 10-5. What is the color of the ...
*April 7, 2013*

**Chemistry **

What is the [H+] of the 0.25 M HCl solution? I'm not given a Ka value, so I'm assuming I won't need one to solve this particular problem?
*April 7, 2013*

**Chemistry **

When looking at a titration curve, I have to determine which is not true and I have it narrowed down to two options: The initial starting point on the titration curve is where pH depends only on [HA]0 or The finial point on a titration curve the pH depends only on [A-] I would...
*April 7, 2013*

**Chemistry **

When the concentration of a weak acid in solution is equal to the concentration of its conjugate base in solution, then: Would pH=pKa or would it equal pH=pKa + 1 like Henderson-Hasselbalch equation?
*April 7, 2013*

**True/False-2**

A function can be continuous at every point of a deleted neighborhood of some point and still not have a limit at the point which is deleted. I'm not even too sure what this means in calculus terms. Can you please explain it better? Thank you.
*March 13, 2013*

**True/False**

A function is continuous at a point if its limit exists at that point. I think it's false because of the counterexample of one-sided limits?
*March 13, 2013*

**Vertical Tangent**

lim x->0+ for 1/1+ (5^(1/x)) I think there's no limit, since there is a vertical tangent at 0, is this correct?
*March 13, 2013*

**Limits-Rationalizing**

I think there's no limit. Is that correct?
*March 13, 2013*

**Limits-Rationalizing**

lim x->1 (1-(1/x^3))/ (1-(1/x^2)) I keep seeming to get a denominator of zero when I rationalized the denominator.
*March 13, 2013*

**Limits-Factored?**

Thank you. I understand that it's because of the (3-x) on bottom that makes it negative?
*March 13, 2013*

**Limits-Factored?**

lim as x approaches 3+ x^2+x-6/18-3x-x^2 I factored it into (x+3)(x-2)/(6+x)(3-x)
*March 13, 2013*

**Inequalities**

Two is greater than five? That's what I do not understand.. Thank you
*March 13, 2013*

**Inequalities**

solve (x-3)/(x+1) > 5 I get x < -2 every time, but it doesnt work when I plug it back in. (I plugged in -5)
*March 13, 2013*

**Rational vs. Irrational**

Okay thank you.
*March 13, 2013*

**Rational vs. Irrational**

Is 3.05313131313131313131313131... irrational or rational? Thanks.
*March 13, 2013*

**Domain- Interval Notation**

Thank you!
*March 13, 2013*

**Domain- Interval Notation**

Domain of g(x) g(x)= sqrt(3-(sqrt(25-x^2)) I got -5, -4, 4, and 5. I wrote it like [-5, -4] U [4, 5] I don't think that's right?
*March 13, 2013*

**Chemistry**

I'm working on a problem dealing with calculating the heat of vaporization for vapor pressures problem. By substituting the problems values into the Clausuis-Clapeyron equation I get: .642= (2.28x10-5) x Delta H vap (J/mol) However, from this point I don't know how to ...
*March 11, 2013*

**Math**

Same kind of problem. How to rearrange to put an equation in quadratic form. Example I'm given is 49.7= 2x^2 / (1.00-x)(2.00-x) which should come out to .920x^2 -3.0x + 2.0 but I can't figure out exactly how to get to there, especially how to get the x squared number.
*March 4, 2013*

**Math**

Stupid question time. I need to figure out how to rearrange equations to solve for x in my chemistry homework, which involves putting equations in quadratic form first. But I can't for the life of me remember how to "rearrange" them correctly. So what in the step...
*March 4, 2013*

**physics**

0,0 is the origin
*March 3, 2013*

**physics**

A proton is put on the positive Y axis a large distance (100km) from the origin. What is the minimum speed required in the - Y direction so the proton will just reach the point (0,20) cm?
*March 3, 2013*

**College Physics**

So what's the minimum speed ?
*March 3, 2013*

**College Physics**

0,0 is the origin there is no repelling charge
*March 3, 2013*

**College Physics**

A proton is put on the positive Y axis a large distance (100km) from the origin. What is the minimum speed required in the - Y direction so the proton will just reach the point (0,20) cm?
*March 3, 2013*

**chemistry**

A sample of propane C3H8 contains 13.5 moles of carbon atoms how many total moles of atoms does the sample contain?
*March 1, 2013*

**Chemistry**

The molal boiling-point constant for water is 0.51 degrees C/molal. The boiling point of a 1.00 molal solution of Ca(NO3)2 should be increased by: A.) exactly 1.53 or B.) Somewhat less than 1.53 This is how I worked the problem: Ca(NO3)2 dislocates into 3 mole particles. ...
*February 21, 2013*

**Chemistry**

Another proposed mechanism problem: H2O2 + I ---> H2O +IO slow H2O2 + IO ---> H2O + O2 + I fast Which of the following statements in incorrect? a.) IO is a catalyst b.) I is a catalyst c.) The net reaction is 2H2O2 ---> 2H2O + O2 I would choose B, since IO is shown as...
*February 19, 2013*

**Chemistry**

The decomposition of ozone may occur through the two-step mechanism shown below: step 1 O3 ----> O2 + O step 2 O3 + O ---> 2O2 The oxygen atom is considered to be: a catalyst or reaction intermediate? How am I supposed to be able to tell the difference between the two? I...
*February 19, 2013*

**Chemistry**

Which of the following solutes, dissolved in 1000g of water, would provide a solution would the lowest freezing point? .030 mol of BaCl2, CO(NH2)2, CaSO4, CH3COOH, or .030 mol of NH4NO3 Again, the steps needed to determine for the freezing point.
*February 19, 2013*

**Chemistry**

Which of the following solutes in aqueous solution would be expected to exhibit the smallest freezing-point lowering (assuming ideal behavior? 0.1 m NaCl .2 m CH3COOH .05 m Al2(SO4)3 .1 m MgCl2 .25 m NH3 What would be the steps to picking the right option? Because just picking...
*February 19, 2013*

**Chemistry**

Which of the following pure liquids is the best solvent for sodium fluoride? CCl4 C2C6 HCl BCl3 or PCl5 My guess would be either CCl4 or C2C6, I need to know the reasoning behind the correct answer.
*February 19, 2013*

**Chemistry**

In a given 1st order reaction A ---> products, the initial concentration of A is 0.40 M. What will be the concentration of A after 15 seconds if the half-life of the reaction is 3 seconds? I found the concentration to be 1.25 x 10-2 M But then how do I find the rate ...
*February 18, 2013*

**Chemistry**

Cyclopropane rearranges to form propene: CH2CH2CH2 --> CH2=CHCH3 by first-order kinetics. The rate constant is k = 2.74 x 10-3 s-1. The initial concentration of cyclopropane is 0.290 M. What will be the concentration of cyclopropane after 100 seconds?
*February 17, 2013*

**Chemistry**

The decomposition of N2O5(g) --> NO2(g) + NO3(g) proceeds as a first order reaction with a half-life of 30.0 seconds at a certain temperature. If the initial concentration [N2O5]0 = 0.400 M, what is the concentration after 120 seconds?
*February 17, 2013*

**Chemistry**

In a given 1st order reaction A ---> products, the initial concentration of A is 0.40 M. What will be the concentration of A after 15 seconds if the half-life of the reaction is 3 seconds?
*February 17, 2013*

**Chemistry**

2A + B2 + C --> A2B + BC Run # Initial Rate (M-1s-1) (A)o (B)o (C)o 1 1.6 x 106 1.2 M 1. x 10-2 M 1.0 M 2 1.6 x 106 2.4 M 1. x 10-2 M 1.0 M 3 3.2 x 106 1.2 M 2. x 10-2 M 1.0 M 4 6.4 x 106 1.2 M 1. x 10-2 M 2.0 M What would be the rate-law expression of the reaction above?
*February 17, 2013*

**Chemistry **

What is the vapor pressure of a aqueous solution containing 10 % (by weight) ethylene glycol (62 g/mol) at 25 °C. PH2O = 24.3 torr at 25°C?
*February 10, 2013*

**Chemistry **

When 1.150 grams of an unknown nonelectrolyte dissolves in 10.0 grams of water, the solution freezes at -2.16°C. What is the molecular weight of the unknown compound? Kf for water = 1.86°C/m. -2.16 x m/-1.86 = 1.16 1.16/ .010 kg of water= 116 1.150/116= 9.91 g/mol is ...
*February 10, 2013*

**Chemistry **

A solution contains 10.0 g pentane, C5H12, 10.0 g hexane, C6H14 and 10.0 g benzene, C6H6. What is the mole fraction of hexane? I figured the equation would be: ___ M Hexane x 10 Divided by 30 =Mole fraction of Hexane?
*February 10, 2013*

**Chemistry **

What mass of water must be used to dissolve 20.0 grams of ethanol, C2H5OH, to prepare a 0.0500 molal solution of ethanol?
*February 10, 2013*

**Chemistry **

What is the molality of an aqueous solution that is 10.0% ethanol, C2H5OH, by mass?
*February 10, 2013*

**Chemistry **

The rate of a reaction A ---> B is expressed by the rate expression rate=k(A)2. If the molar concentration of A is tripled, the rate of the reaction should increase by a factor of some many?
*February 9, 2013*

**math**

how do I write equation for the following? input a 20/28/36/44/52 output b 5/7/9/11/ ? ? is 13
*January 23, 2013*

**Math**

You have 2/3 bag of flour. Use 3/4 of the flour to make cookie dough. How much of the entire bag do you use to make cookie dough?
*December 17, 2012*

**Math**

The teacher asked Laura to give each student 2/5 sheets of paper. If there are 20 students in the class how much paper did Laura pass out?
*December 17, 2012*

**GRAMMAR**

WRITE AN ARTICAL ABOUT CALIFORNIA GOLD RUSH
*December 11, 2012*

**chemistry**

My chem book gives me the following Hess' Law example: Mg + 2HCl --> H2 MgCl2 Delta H1 MgO +2HCl --> H2O +MgCl2 Delta H2 H2 + 1/2 O2 --> H2O Delta H3=-68.3kcal The desired reaction is the formation reaction of MgO as follows: MgS +1/2 O2 --> MgO Delta H final= ...
*December 6, 2012*

**physics**

A weightlifter has a basal metabolic rate of 80.0 W. As he is working out, his metabolic rate increases by about 650 W. (a) How many hours does it take him to work off a 450-Calorie bagel if he stays in bed all day? (b) How long does it take him if he’s working out? (c) ...
*November 28, 2012*

**precalculus**

My book says a way for me to graph/plot points for my function is to write it in exponential form. For example. "Graph (fx)= log base 2(x-2) y=log base 2 (x-2) x-2=2^y x=2^y + 2 So now I can just plug any y value in to get my x value to graph my translated graph. So I was...
*November 21, 2012*

**precalculus **

When asked to sketch the graph of g(x)= -e^(x+1) +1, how do I turn this equation into exponential form? Or can I? I always get confused on what to do especially when I need to the x part of the equation out of the exponent.
*November 21, 2012*

**precalculus **

My book tells me to solve each exponential equation. I am given a lot of problems such as 6^x+1 = 4^2x-1 where I use In in the problem to help get my answer. However, in the same section, the book starts giving me problems such as 3(2)^x-2 +1=100 and .05(1.15)^x =5 etc. Where ...
*November 21, 2012*

**precalculus **

e^3x-7 x e^-2x =4e First step I get e^1x-7 =4e For the example in my book, the next step they divided by e. But I have no idea how to do this, or what involves?
*November 21, 2012*