# Posts by Marcus

Total # Posts: 267

**physics**

Sorry . for the force A , the direction is actually NW and the direction for C is 40 degrees SW

**physics**

Three forces A (30N at 35 degrees NE), B (40N at 25 degrees SW) and C (50N at SE) all act on one original point. Find the magnitude and direction measured from the positive x-axis of a fourth force F required to keep the body in equilibrium.

**Math**

Simplify the following expression. Write the result using positive exponents. (-2xy^-3)^-5 / (xy^-1)^-1

**math**

book which costs $12. He has saved one third of the amount he needs. How much money does he still need to save?

**Fractions**

(4y^-3/5x^-4)^2

**Math**

robby runs for 5 minutes. He walks for 10 minutes. He runs for 7 minutes. He walks another 4 minutes. He runs again for 8 minutes and walks again for 3 minutes. what is the range of minutes robby runs?

**Math**

How to draw tow different parallelograms that each have an area of 4 square inches

**Life orientation**

napotilism

**statistics**

Suppose babies born in a large Hospital have a mean weight of 4088 in a variance of 5569. if 128 babies are sample that a random from the hospital what is the probability that the mean weight of the sample babies would differ from the population mean by less than 41 grams ...

**Science**

Polar

**Math**

What is 17% of 200? .17 x 200 = 34 What is the number 200 increased by 17%? 200 x 1.17 = 234 What is the number 200 decreased by 17%? The only way I knew to do this is based on the first question - since that answer was 34, I subtracted 34 from 200 and the answer was 166. Is ...

**Physics**

In problem 1, where did you get 484? Also, how did you get the velocity?

**Physics**

A projectile with a mass of 2.50 kg is shot horizontally from a height of 15.0 m above a flat surface. The projectile's initial speed is 22 m/s. 1.How much mechanical energy does the projectile have initially ? 2.How much work is done on the projectile by gravity as it ...

**Math**

I am the product of 135 and decreased by 500. who am I?

**algebra 2**

what is the domain in interval notation when the restrictions are x cannot = 2 and x cannot = -2? I got (-infinity, 2) U (2,-infinity) (-infinity, -2) U (-2, infinity) but my math teacher marked this as wrong

**Physics addition of velocities**

A seagull flies at a velocity of 7.00 m/s straight into the wind. (a) If it takes the bird 17.0 min to travel 6.00 km relative to the earth, what is the velocity of the wind? (b) If the bird turns around and flies with the wind, how long will he take to return 6.00 km?

**chemsitry**

home / study / questions and answers / science / chemistry / make sure to answer both parts: 1)balance the following ... Your question has been posted. We'll notify you when a Chegg Expert has answered. Post another question. . Question Edit question make sure to answer ...

**Physics Projectile Motion**

A projectile is launched at ground level with an initial speed of 51.5 m/s at an angle of 35.0° above the horizontal. It strikes a target above the ground 2.50 seconds later. What are the x and y distances from where the projectile was launched to where it lands?

**English**

What is the difference between modern fantasy and regular fantasy. Is modern fantasy merely a subgroup of fantasy? Some examples would help.

**english**

Researchers are LEAST likely to want to know which of the following from their sources?

**English**

What are the values (negative) being taught in this advertisement? The advertisement is trying to sell a military style watch. In the advertisement there are two armed soldiers in the background and appear to be situated in a war zone area. I am able to work out that there are...

**english**

What are the values (negative) being taught in this advertisement? The advertisement is trying to sell a military style watch. In the advertisement there are two armed soldiers in the background and appear to be situated in a war zone area. I am able to work out that there are...

**chemistry**

How do I set this problem up?

**chemistry**

50.0 mL of a solution of HCl is combined with 100.0 mL of 1.15 M NaOH in a calorimeter. The reaction mixture is initially at 22.4°C and the final temperature after reaction is 31.2°C. What is the molarity of the HCl solution? You may assume that there is an excess of ...

**Geometry**

The perimeter of a scalene triangle is 14.5 cm. The longest side is twice that of the shortest side. Which equation can be used to find the side lengths if the longest side measures 6.2 cm?

**physics 105**

How many cubic feet will 44lb of CO2 occupy at STP

**HEALTH**

Phonology refers to the science which treats

**HEALTH**

Phonology refers to the science which treats A. blood disorders. B. vocal sounds. C. heart rhythms. D. nutritional deficiencies.

**Cardiovascular Respirtory**

A patient complains of a fast heart rate. Which diagnosis does this statement indicate? A. Arrhythmia B. Infarct C. Ischemia D. Tachycardia

**Cardiovascular Respirtory**

Which suffix would be used in a term pertaining to a meal? A. -EMESIS B. -RRHEA C. -TRIPSY D. -PRANDIAL

**Cardiovascular Respirtory**

When referring to a distended blood vessel, a doctor may use the term A. ascites. B. varicose. C. globulin. D. syncope.

**Cardiovascular Respirtory**

Which of the following structures are tubes? A. Cilia, adenoids, mucous, epiglottis B. Apex, base, hilum C. Frontal, maxillary, sphenoidal, ethmoidal D. Eustachian, pharynx, bronchi

**math factoring 50x30**

1500

**chemistery lab..urgent**

hi..can someone hwlp me out here on how we can calculate the moles of H2T(phthalic acid)?? its urgent for my lab this evening 1:00pm friday

**chemistry**

state the chemical formula of phthalic acid and calculate the molar mass using the formula.

**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.

**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 ...

**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 ...

**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.

**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?

**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?

**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?

**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 ...

**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 ...

**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?

**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?

**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?

**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

**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...

**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.

**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.

**algebra**

Simplify the exponential expression [-10x13y^12]^0 ---------------- 2x^9y^3

**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 ...

**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 ...

**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?

**math**

If tree is broken 18 feet from its base. The top lands 24 feet from the base. How tall is the tree?

**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

**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 ...

**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 ...

**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

**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?

**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.

**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.

**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.

**English Grammar**

Which sentence uses proper grammar? I'm bored by math class. Or I'm bored of math class.

**Algebra Help**

Factor: 49^2+112r+64 =

**Math**

30+50=80

**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.

**MIT 2.01X**

HW7_1B_1 : Mmax+=4000

**Physics**

HW5_4_1_b : ´-Q_2 :

**Physics**

HW5_4_1_b : ´Q_2 :

**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

**Engineering**

Q1_2_3 (25/12*W*H)/A_0*E_0

**Engineering**

Q1_2 _1 400 500 699.99 665.68

**math**

104

**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.

**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 ...

**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&#...

**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...

**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?

**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 ...

**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 ...

**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?

**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...

**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?

**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.

**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?

**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?

**Limits-Rationalizing**

I think there's no limit. Is that correct?

**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.

**Limits-Factored?**

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

**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)

**Inequalities**

Two is greater than five? That's what I do not understand.. Thank you

**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)

**Rational vs. Irrational**

Okay thank you.

**Rational vs. Irrational**

Is 3.05313131313131313131313131... irrational or rational? Thanks.

**Domain- Interval Notation**

Thank you!

**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?

**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 ...