Saturday
November 22, 2014

Posts by MAry


Total # Posts: 3,303

physics
An astronaut (mass of 100 kg, with equipment) is headed back to her space station at a speed of 0.750 m/s but at the wrong angle. To correct her direction, she fires rockets from her backpack at right angles to her motion for a brief time. These directional rockets exert a ...
November 19, 2014

CAL
Hmmm you know what, I think this problem is an error. Maybe thats why I could not figure it outt?
November 16, 2014

CAL
The slope of the tangent line to the graph y= x^3/x -x at the point (1, -2/3) I keep getting undefined as a answer but.. I feel like I might be doing something wrong because I feel like that is not the answer, can you help me please?
November 16, 2014

economics
Assume a firm is a monopsonist that can hire its first worker for $6 but must increase the wage rate by $3 to attract each successive worker (so that the second worker must be paid $9, the third $12, and so on). The marginal revenue product of labor is given in the table below.
November 16, 2014

Calculus - PLEASE HELP!!
Ok. Thanks. The answer key said -1 though. So I thought I might have done something wrong.
November 12, 2014

Calculus - PLEASE HELP!!
Use L'Hospital's Rule to solve: lim u --> 1 of (u-1)^3/ ((1/u) - u^2 + (3/u) - 3) Ok, so what I thought was that it is type 0/0 so taking the derivatives of the top and bottom 3(u-1)^2 /(-u^-2 -2u - 3u^-3) and subbing in u = 1 = 0/-6 = 0
November 12, 2014

Math
Estimate the product by finding two answers the exact answer is between 7x 3,289
November 11, 2014

science
If you had 50 atoms of hydrogen, how many atoms each of oxygen, carbon, and nitrogen would you need to have the elements in the same proportion as they are in your body?
November 10, 2014

science
A certain mass of water gains 1,673 J of thermal energy when it's temperature increases by 2.0 degrees Celsius. What is the mass of the water?
November 10, 2014

science
How does the temperature of 33.0 g of graphite change when it absorbs 350 J of thermal energy?
November 10, 2014

science
How much thermal energy is needed to raise the temperature of 4.0 kg of water from 25 degrees Celsius to 75 degrees Celsius?
November 10, 2014

science
On a hot day a friend suggest that you can make your kitchen cooler by leaving the refrigerator door open. Explain whether leaving the refrigerator door open would cause the air temperature in the kitchen to decrease.
November 10, 2014

science
Which has the greater amount of thermal energy, one liter of water at 50 degrees Celsius or two liters of water at 50 degrees Celsius?
November 10, 2014

Math - Word problem
Hi Reiny - I looked at the picture and redrew my walls, but it still doesn't come out for walls that are 10' in each direction. I noticed that the ceiling and floor in the picture had a longer dimension than the side heights, so I took ceiling and floor and extended ...
November 9, 2014

Math - Word problem
I posted this earlier and received a reply - but the reply doesn't make sense. I drew up a picture of what was posted, but the figure comes out to finding the hypotenuse of a triangle that is 16x14 - not 16x10. What am I not seeing? Original problem: There is a room 10 ...
November 9, 2014

Math -word problem
I made your configuration with sheets of paper 10" x 10". I got the 16" leg, but I don't get the 10 foot height. I have the walls/ceiling in position similar to a backwards z. But from one foot over to the right from F, if I go straight up to form one of the...
November 9, 2014

Math -word problem
There is a room 10 feet high by 10 feet wide by 10 feet in length. On one wall, there is an electrical outlet 1 foot from the floor and centered five feet from each side of the wall. On the opposite wall, one foot from the ceiling and centered five feet from each side of the ...
November 9, 2014

Early Childhood Education
Studies show that early readers: A. watched educational television more than two hours a day. B. had access to a variety of reading material and watched educational television. C. knew all of the letters and sounds by age 2. D. were read fiction and non-fiction books during ...
November 7, 2014

math
what does rose mean/fell
November 5, 2014

math
How to find the area of a regular hexagon with a perimeter of 78 inches and a perpendicular distance of 11 inches from side to center
November 4, 2014

Chemistry
If a calorimeter has a mass of 6.0 g, a specific heat of 2.0 J/(g*C), and it and its contents undergo a temperature increase of 5.5 *C, how much heat is gained by the calorimeter?
November 1, 2014

ratios
simplify the rate 35 cups to 84 people
October 31, 2014

math
Karen collects 6/7 quart of rainwater. She uses ½ of the water to clean her bicycle and uses the remaining water equally for 3 houseplants. What volume of water does she use for each houseplant?
October 30, 2014

Chemistry
A student weights 1.700 g of succinic acid and dissolves it in water in a 250.0 mL volumetric flask. A 25.00 mL sample of this solution is withdrawn and placed in a 125 mL Erlenmeyer flask, to which 5 drops of the acid-base indicator phenolphthalein is added. This solution is ...
October 26, 2014

math
your recipe calls for 300 grams of chocolate .you have 200 grams .what fraction of chocolate do you have?
October 26, 2014

intermidiate algebra
Best Rentals charges a daily fee plus a mileage fee for renting its cars. Barney was charged $111.00 for 3 days and 300 miles, while Mary was charged $198.00 for 5 days and 600 miles. What does Best Rentals charge per day and per mile?
October 25, 2014

Maty
Best Rentals charges a daily fee plus a mileage fee for renting its cars. Barney was charged $111.00 for 3 days and 300 miles, while Mary was charged $198.00 for 5 days and 600 miles. What does Best Rentals charge per day and per mile?
October 25, 2014

science
Due to friction with the Earth's atmosphere, a large static electric charge could build up on our plummeting asteroid fragment. Would you expect our fragment to generate a magnetic field? Explain why or why not
October 24, 2014

Math
How do you divide 3/4 by 2/3?
October 23, 2014

Math HELP!
No, the answer is 14 in.
October 22, 2014

algebra
3/5-i
October 19, 2014

Help- Calulus
Yeah, its on my AP Calculus homework actually, in reality its just a small part of a very very long question, I just wanted to make sure I did my work right because the first step is the most important in this problem because if I get part A wrong then I will end up getting ...
October 17, 2014

Help- Calulus
A. If the focal length of the convex lens is supposed to be 5 cm, and if the image is formed 7 cm from the lens, find the distance, p, from the lens to the object. (It’s not necessary to simplify your answer.) Equation: 1/p + 1/q = 1/f
October 17, 2014

Calculus
Ohhhhhhhhhhhhhhhhhhhhh, Thanks!
October 17, 2014

Calculus
Suppose a ball is thrown straight up into the air, and the height of the ball above the ground is given by the function h(t) = 6 + 37t – 16t2, where h is in feet and t is in seconds. At what time t does the ball stop going up and start returning to earth?
October 17, 2014

Calculus
The population of a colony of bacteria is modeled by the function p(x)=50(e^-x - e^-x^2)+10 ,for 0 ≤ x, where population P is in thousands, x is in hours, and x = 0 corresponds to the moment of introduction of a certain chemical into the colony's environment. At ...
October 16, 2014

Calculus
The population of a colony of bacteria is modeled by the function p(x)=50(e^-x - e^-x^2)+10 , for 0 ≤ x, where population P is in thousands, x is in hours, and x = 0 corresponds to the moment of introduction of a certain chemical into the colony's environment. At ...
October 16, 2014

Calculus..
Thanks :)
October 16, 2014

Calculus..
Two particles are moving in straight lines. The displacement (meters) of particle 1 is given by the function s(t)= cos(4x), where t is in seconds. The displacement (meters) of particle 2 is given by the function s(t)= t^3/3-t^2/2 +2(t) , where t is in seconds. Find the first ...
October 16, 2014

Chemistry
Do you expect CaCl(s) to be stable if the 1st ionization energy of Calcium is approx. 590 kj/mol, the Lattice Energy is approx 700 kj/mol and the total change in enthalpy is -36? Why?
October 14, 2014

physics
Thank you!
October 8, 2014

physics
In a traction setup for a broken bone, with pulleys and rope available, how might we be able to increase the force along the femur using the same weight?
October 8, 2014

General Psychology
Which of the following is a stimulant? Alcohol LSD Heroin Mescaline Nicotine
October 8, 2014

physics
A 35.9 kg child starting from rest slides down a water slide with a vertical height of 20.3 m. (Neglect friction.)What is the child speed half way down
October 7, 2014

College Alg
The revenue and cost equations for a product are R=x (50-0.002x) and C= 12x+ 150000. Where R and C are measured in dollars and x represents the number of units sold. How many units must be sold to get a profit of at least 1,650,000
October 1, 2014

Fluid Mechanics
Oil (sp. gr.= 0.8) flows smoothly through the circular reducing section shown at 3 ft^3/s. If the entering and leaving velocity profiles are uniform, estimate the force which must be applied to the reducer to hold it in place. When Fluid is entering the pipe: P= 50 psig ...
September 30, 2014

math
ann takes a taxi at 2.10 per mile and she gives the driver a 5.00 tip she spend a total of 49.10 write an equation to represent total cost in terms of distance
September 22, 2014

health care administration
I need to write a weekly overview for my class. I have tried to Google but I keep asking it wrong. Any ideas on how to see an example of a overview of the class? Thank you Mary
September 19, 2014

physical science
Two 3.4 kg physical science textbooks on a bookshelf are 0.25 m apart. What is the magnitude of the gravitational attraction between the books?
September 19, 2014

math
Estimate 540943 + 382093= 923036
September 19, 2014

math 4th grade
Find two numbers the exact answer is between 3x567
September 18, 2014

Physics
Eileen, Jackie, and Kathryn needed to find the difference between two angles A1 and A2, that they had drawn on a diagram: B = A1+A2 They then had to find the cosine of B. Jackie measured A1 to be 50° and A2 to be 3°. But their pencil was kind of dull, so the lines they...
September 17, 2014

algebra
the water ina beaker has of18g electeicity is passed thought the water for two hours afterward the water has a mass of only 16g what happen to the missing mass?
September 17, 2014

health care administration
I need some advice on what are some health care products. The only thing I come up with is Q-tips and liquid bandage. Any ideas? The assignment is how the four P's influences the success of the product. I know how to do this.
September 16, 2014

Chemistry please help
thank you so much, yes the site is helpful
September 11, 2014

Chemistry please help
Complete each calculation. Express your answer to the correct number of significant digits. a)4.02mL + 3.76mL +0.95mL b)(2.7 x 10^2m) x (4.23 x 10^2m) c)5092kg divided by 23L d) 2-6.3 + 6-7 e)(6.853 x 10^3L) + (5.40 x 10^3mL) f)(572.3g + 794.1g) divided (24mL + 52mL) My ...
September 11, 2014

Physics
Two cars, A and B, travel in a straight line. The distance of A from the starting point is given as a function of time by xA(t)=αt+βt^2, with α=2.60m/s and β=1.20m/s^2. The distance of B from the starting point is xB(t)=γt^2−δt^3, with γ...
September 7, 2014

stats
what are the mean and standard error when using central limit theorem for dichotomous variable
August 28, 2014

Math
Suppose that y varies inversely as t he cube of x. If y is 1/2 when x is 2 , find the constant of variation and variation equation
August 28, 2014

Th
the area of a regular polygon varies jointly as its apothem and its perimeter. express the area in terms pf apothem a and the perimeter p
August 28, 2014

math
I have a nickel. dime and a quarter, the dime is in the middle, how do I move the dime from center wihtout touching it. I would simply slide the nickel to the back
August 26, 2014

math
I agree
August 26, 2014

math
The cost for class trip is $5 per student plus$100 for the bus. Input(x) rule output(x) 18 22 24 30
August 26, 2014

math
How many possible license plates can be made with 4 letters followed by 4 numbers and must start with the letter C
August 26, 2014

business
Wallace Inc., a developer of radiology equipment, has stock outstanding as follows: 30,000 shares of cumulative preferred 2% stock, $90 par and 125,000 shares of $10 par common. During its first four years of operations, the following amounts were distributed as dividends: ...
August 25, 2014

math
50 in 100 and 30 in 90
August 18, 2014

psychology
1 what does peter singer say about history liberation movements? 2 The philosopher,John Stuart mill recognized the follow as a potential problem for utilitarianism what is peter point about performing vivisection on mentally health disabled human infants?
August 16, 2014

Math
Adrienne had a party at a local bowling alley. She spent seventy-five dollars for the lane and five dollars per person for shoes. Let c be the total cost of the lane and shoes, and let f be the number of friends at her party. Write an equation to represent the problem. Which ...
August 12, 2014

math
For the car loan described, give the following information. A newspaper advertisement offers a $4,500 used car for nothing down and 36 easy monthly payments of $157.62. (a) amount to be paid
August 5, 2014

Public Health
The assignment What is a public health agency that affects your workplace or your health care provider. My question: Where can I find some names to do my work? I know about the FDA and CDC and the Department of disabilities. Thank You Mary
August 1, 2014

Calculus
Determine whether Ax = lnx/(sqrt x) is convergent
July 31, 2014

english
Freud believed the purpose of dreams is to consolidate memories and new learning. sort through possible solutions to everyday problems. fulfill wishes. discard unnecessary information. reconcile urges.
July 27, 2014

english
Freud believed the purpose of dreams is to
July 27, 2014

finance
202,200
July 27, 2014

finance
206,600
July 27, 2014

finance
$200.00
July 27, 2014

math
at the rate of 360 miles per hour, how far would an airplane travel in 1 hour and 20 minutes
July 16, 2014

math
a saleman, after deducting his commission of 6%, remits $2491 to his company. The gross amount of the sale amounted to.
July 16, 2014

psychology
A hypothesis is what an investigator uses to: duplicate research findings of other scientists. frame his/her research question. explain why he/she obtained a certain result from an experiment. define the parameters of a research study. determine what kind of research design to...
July 15, 2014

english
Who kills The Witch? Miss Foley Will Halloway Charles Halloway Jim Nightshade
July 6, 2014

english
What do the sign say that is on display at the carnival? The Most Beautiful Woman in the World Siamese Twins A Two-Headed Horse None of the above
July 5, 2014

physics
What is the acceleration of an object if it takes 10 seconds to increase its velocity by 40m/seconds?
June 25, 2014

bearing and distance
Two vehicles p and q leave a station at the same time.p travels 8km/hour on a bearing of 025 degree and q 5km/hour on a bearing of 45 degree west of north.how far apart are they and what is the bearing of p from q after 3hours?
June 14, 2014

math,bearing and distance
A man walks 100m due north and then 150m on a bearing of s30 degree of north.how far and on what bearing is he.from his original position?
June 14, 2014

math
. Jacqueline Strauss, a 25- year- old personal loan officer at Second National Bank, under-stands the importance of starting early when it comes to saving for retirement. She has committed $ 3,000 per year for her retirement fund and assumes that she’ll retire at age 65. ...
June 12, 2014

Algebra
If Buster Posey gets on base 45% of the time, what's the probability he will get on 5 out of 7 times at bat?
June 10, 2014

math
Max is 5 years younger than Michael . 4 years ago the sum of their ages was 25. How old are they ?
June 8, 2014

math
2and3/4plus 1and1/4 equals
June 6, 2014

maths
Jason rolls a can of baked beans from one end of his carpet to the other. If his carpet is 3 m long and if the can has a diameter of 75 mm, how many complete revolutions will the can make?
June 4, 2014

Chemistry
If 87.3 mL of 0.225M KOH solution is mixed with 44.4 mL of 0.313M H2SO4 solution, would the resulting mixture be acidic, basic or neutral?
June 3, 2014

English8
Before running, Jim always stretches. Is the gerund phrase before running or just running?
May 15, 2014

English8
Noreen hates being left behind. Find gerund phrase and tell if it is S, PN, DO, or OP I think it it being left behind and it is either direct object or predicate nominative
May 15, 2014

English
Collecting candy on Halloween and it is the subject
May 15, 2014

English
Collecting candy on Halloween still appeals to Del. find gerund phrase and tell if it is the subject, predicate nominative direct object or object of preposition
May 15, 2014

geomettry
An artist is using a coordinate plane to plan a string design for a wall. The artist plans to hammer a nail at each vetex of regular hexagon. then the artist will string to connect the vertices to make the hexagon shape. the artiststarts with a circle centered at the origin ...
May 14, 2014

geo
a graphic artist is using a coordinate plane to design a company logo. the log has an equilateral triangle inscribed in a circle.. The lies in quadrant 1, is tangent to the x and y axis and has a radius of 10 units. one side of the triangle is parallel to the y axis and one ...
May 14, 2014

science
a land form characterized by high elevation and a more or less level surface is called A.mountian B.plain C.plateau D.hill 3.which of the following statements about topography is correct A. The topography of an area includes the area's elevation, relief, and land forms B. ...
May 14, 2014

science
i think it is b
May 14, 2014

science
how is the equator similar to the prime meridian A. both the prime meridian and equator are lines that divide earth into norther and southern hemispheres B. both the prime meridian and equator are imaginary base lines from which locations of earth can be measured D. both the ...
May 14, 2014

statistics
8.Jean Siskel is an entertainment analyst for West Coast Securities. He is trying to develop a model to estimate gross earning generated by a new movie release. He has collected the following data on 20 movies: Gross Earnings, Production Costs, Promotion Costs, and if the ...
May 8, 2014

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