Thursday
May 28, 2015

Posts by maria


Total # Posts: 1,639

Math
An oil company in Houston, Texas is hiring a geologist. The company interviewed 16 candidates. After the interviews, they ranked the top 5 candidates from first to 5th. How many lists can be formed?
May 17, 2015

Math
Five cards are dealt from a deck of 24 cards to form a euchre hand. Is this a combination or permutation? 4 actors are chosen To play the Beatles in a film. Is this combination or permutation?
May 17, 2015

Math
Thanks!
May 17, 2015

Math
Count the number of ways to award first place to third place to the top three groups in an engineering competition.
May 17, 2015

Physics
Thanks, but can you show procedure?
May 3, 2015

Physics
Consider two students, a 65 kg guy and a 50 kg girl who are attracted to each other, gravitationally, that is. They sit next to each other in Physics class which means there is 1.5m between their centers. What is the magnitude of the force of gravity between these two students...
May 3, 2015

check pls
Grayson is designing a rectangular athletic field. On his scale drawing. the vertices of the rectangle are (4,5), (9,10), and (9,5). What are the coordinates of the fourth vertex? A. (4,9) B. (4,10) C. (5,10) D. (5,9) I think it's A. (4,9) Am i right?
April 30, 2015

Physics
Thank you so much Henry!
April 30, 2015

Physics
A racket exerted an average force of 152.0 N on a ball initially at rest. If the ball has a mass of 0.070 kg and was in contact with the racket for 0.030 s, what was the kinetic energy of the ball as it left the racket?
April 30, 2015

chemistry
You are given an organic solution which reacts with most organic solvents. how would you obtain the IR spectrum of it?
April 26, 2015

Chemistry
What is the equilibrium equation for FeS(s) + 2H3O+(aq) - Fe2+(aq) + H2S(aq) + 2H2O(l) ? Explain if possible !
April 23, 2015

physics
A 15.0cm object is placed 60.0cm from a convex lens which has a focal lenght of 15.0cm use the thin lens equation to find the distance of the image (60)1/15=1/60+1/60(1/15)=1-1+1/d
April 23, 2015

math
Suppose you want to build an outdoor rectangular pen enclosed by fencing for a pet. You want the pen to have an area of 64 square feet. Write and post one set of dimensions that could be used for the pen, along with the perimeter of the pen.
April 17, 2015

Physics
If a 0.50-kg block initially at rest on a frictionless, horizontal surface is acted upon by a force of 8.0 N for a distance of 4 m, then what would be the block's velocity?
April 15, 2015

Math
Thank you
April 8, 2015

Math
What value of x makes this equation true? 1/3(9x-2)+1=2(4x+1) a) x=-3 b)x=-1/3 c)x=1/3 d)x=3 Please explain. Having a hard time figuring out.
April 8, 2015

math
charlie says that y=2x squared is not a function because the same y-value sometimes corresponds to more than one x-value. Is charlie correct
April 7, 2015

Chemistry
C18H32O2 + 2H2 - C18H3602; oxidized or reduced?
April 7, 2015

Algebra
@Ms.Sue
April 7, 2015

Algebra
1. If m∠1=37º , what is m∠4? a) 53º b) 43º c) 37º d) 27º 2. If m∠1=50º , what is m∠5? a) 50º b) 40º c) 35º d) 25º 3. If m∠4=25º , what is m∠8? a) 105º b) 75º c) 175º d) 25...
April 7, 2015

math
the scale listed on the box containing a model ship is 1 inch to 8 feet. which proportion can be used to find the actual length of the ship if the length of the model is 5 feet
March 27, 2015

physics
You're in an airplane that flies horizontally with speed 830km/h (230m/s ) when an engine falls off. Neglecting air resistance, assume it takes 35s for the engine to hit the ground. Find the height of airplane. Find the horizontal distance that the aircraft engine falls.
March 26, 2015

math
Why wasn't cross multiplication used. Five editors finish a project in 3 1/2 weeks. How many editors are needed to complete the same project in 1 1/6 weeks 5/3.5= x/1.16
March 26, 2015

math
Is there some other way I can explain this to my 8th grader. Five editors finish a project in 3 1/2 weeks. How many editors are needed to complete the same project in 1 1/6 weeks
March 26, 2015

math proportions
Five editors finish a project in 3 1/2 weeks. How many editors are needed to complete the same project in 1 1/6 weeks?
March 25, 2015

TMCC
Donna has scored 73 , 82 , 71 , 79 , and 69 on her previous five tests. What score does she need on her next test so that her average (mean) is 75 ?
March 24, 2015

Chemistry
Thank you!
March 22, 2015

Chemistry
I think I have worked out the answers - the volume of carbon dioxide would be 20dm3 and the volume of oxygen required would be 40dm3. Please let me know if I am incorrect. Thank you.
March 22, 2015

Chemistry
If 20dm3 methane was burned in pure oxygen: CH4(g) + 2O2(g) arrow CO2(g) + 2H2O(l) how do I work out the volume of carbon dioxide made? And what volume of oxygen would be required? Thank you.
March 22, 2015

English
Are you asking if the sentence is a question? If so, then no it isn't a question.....
March 22, 2015

application of differential equation
somebody please help me find the solution totally lost.... An object of mass 100g is thrown vertically upward from a point 60cm above the earths surface with an initial velocity of 150cm/sec. It rises briefly and then falls vertically to the earth, all of which time it is ...
March 21, 2015

application of differential equation
An object of mass 100g is thrown vertically upward from a point 60cm above the earths surface with an initial velocity of 150cm/sec. It rises briefly and then falls vertically to the earth, all of which time it is acted on by air resistance that is numerically equal to 200v (...
March 21, 2015

Perimeter
Lamar made a garden in the shape of a rectangle with an area of 36 square feet. The shorter side of the garden measures 4 feet. Explain how you can find the perimeter of the garden.
March 19, 2015

Math 5th grade
Thank you.
March 11, 2015

Math 5th grade
John brings fruit punch to a school party. He brings 6 gallons of fruit punch but the students only drink 3/4 of it. How much did they drink?
March 11, 2015

maths please help and explain
1.evaluate without using a calculator 2logx+1=log900 2.solve the following equation A. 3log(x-2)=4.714 B. 16^x-3 = 8^2x+1 C.10^2x=1/100
March 11, 2015

math
In 2000, about 51% of the 280,000,000 US citizens were women. Their median age was 36.6. About how many of these women were younger than age 36.6?
March 10, 2015

Chemistrhy 110
How many grams of Na2CO3 must be dissolved in 3.75 L of aqueous solution to yield a molar concentration of 1.75 molar?
March 10, 2015

science
Coefficient of friction is 13.0? Am I correct?
March 2, 2015

science
A body with a mass of 490kg is pulled along a horizontal plane at a constant velocity.the pulling force is 1.2 kN is making an angle of 20degrees with the plane. A.determine the coefficient of friction
March 2, 2015

science
1 . A body with a mass of 490kg is pulled along a horizontal plane at a constant velocity.the pulling force is 1.2 kN is making an angle of 20degrees with the plane. A.determine the coefficient of friction
March 2, 2015

Organic Chemistry
So, eclipsed with the methane on C2 and the rest of the chain (CH2CH3) on C3 in the same relative "position"?
February 25, 2015

Organic Chemistry
Looking down C2-C3 of 2-methylpentane, is the first newman projection staggered or eclipsed?
February 25, 2015

Math
It's an irregular hexagon. The base of the hexagon is 12m, the length of one side is 9m, the length of the other sides are 5m, and 4m, the width of the other sides are 7m and 5m. What is the area of the hexagon ?
February 23, 2015

math
it's an irregular hexagon. the base of the hexagon is 12m, the length of one side is 9m, the length of the other sides are 5m, and 4m, the width of the other sides are 7m and 5m
February 22, 2015

math
it's an irregular hexagon. the base of the hexagon is 12m, the length of one side is 9m, the length of the other sides are 5m, and 4m, the width of the other sides are 7m and 5m
February 22, 2015

math
what is the area of a hexagon with sides 5m, 4m, 5m, 9m, 7m and 12m
February 22, 2015

math
0.6 divided by (0.4 x 0.5)
February 22, 2015

math
In a bag are three red marbles and three green marbles. If two marbles are drawn from the bag at the same time, what is the probability that both marbles will be red?
February 22, 2015

math
explain comparing fractions 21/25?
February 19, 2015

physics
if a 400g ball moving 1.2 m/s [north], receives an impulse that changes its direction and speed to 2.8 m/s [east], what is the change of momentum?
February 13, 2015

physics
a regulation golf ball has a mass of 45.0 grams. a golf ball is dropped from a height of .305 m and it strikes the floor with a velocity of 2.35 m/s [down]. if the velocity of the ball as it leaves the floor is 2.15 m/s [up]. determine the impulse applied to the golf ball.
February 13, 2015

Physics
Two people are holding up the ends of a 4.40-kg wooden board that is l = 1.95 m long. A m = 2.00-kg box sits on the board, 0.50 m from one end, as shown below. What forces do the two people exert?
February 12, 2015

science
If we added more mass to the blocks of wood during these lessons,how would that have changed the experiment?
February 11, 2015

Algebra 2
simplify each expression. rationalize all denominators. assume that all variables are positive (1-sqrt(3x))/(sqrt(6x)) Please show work!!!!
February 9, 2015

Algebra 2
Steve can't teach well
February 9, 2015

Algebra 2
solve each equation. check for extraneous solution. sqrt(3x+4)-sqrt(2x-7)=3 please show work!!!!!
February 9, 2015

Algebra 2
solve each equation. check for extraneous solutions. sqrt(2x+1)+sqrt(2x+6)=5 please show work!!!!!
February 9, 2015

math
Gabe went to the amusement park with $40 to spend. His ticket cost $26.50. Write and solve an inequality to show how much he might spend on souvenirs and snack. Please tell me how you got this answer to this question.
February 8, 2015

math
a service of juice is 250 ml. how many servings are in a doze liters of juice?
February 4, 2015

math
Aaron has 5 pounds of flour. He needs 1/8 of a pound of flour to make a single cupcake. how many cupcakes can he make?
February 2, 2015

Math
Netta faxed n pages from the library. The library charges $1.50 per page. Later the same day, Netta faxed n more pages from a local copy shop. The copy shop charges $1.25 per page plus a $2 convenience fee. Write and simplify an expression for the amount Netta spent on faxes ...
January 22, 2015

Chemistry
qs, don't we need the concentration of what's left when we use the equation? Or are they the same thing with moles?
January 18, 2015

Chemistry
What will the pH be if 15 mL of 0.1 M HCl are added to the buffer obtained by mixing 70 mL of 0.5 M CH3NH2 and 30 mL of 1.0 M CH3NH3+Cl-? (Kb for CH3NH2 is: 5.2 x 10-4 ) I'm having a hard time figuring out what to do first. is the ICE table come in handy for this? Can you ...
January 18, 2015

science
What are some arguments against extending human life? Please describe at least one objection and one objection from your research and experience.
January 16, 2015

Math
Find the vertex: -1/4x^2+9/5x+2
January 7, 2015

Math
so b) will be g3 and c) will be d represents dollars per gallon and g represent gallons of gas? What else? Can you please check my answers, thank you very much.
January 6, 2015

Math
Mia buys 3 gallons of gas that costs d dollars per gallon. Bob buys g gallons of gas that costs $3 per gallon. a) Write an expression for the amount Mia pays for the gas. b) Write an expression for the amount Bob pays for the gas. c) What do the numeral and the variable ...
January 6, 2015

businesss
what does franchiser and franchisee mean and what are their defintions
January 5, 2015

Bussiness
could you give me the definitions for these two and could tell me the disadvantages and the advantages -franchiser -franchisee
January 5, 2015

math
-1
January 4, 2015

ELEMEMTARY MATH
12 = √4 x √3 2. and because 4 is a square number it can be squared to 2 √12 = 2√3 3. and because 3 can't be square rooted you just leave it so your answer will be √12 = 2√3
January 1, 2015

Applied Chemistry Project Help!!!
Research and describe one current application of the knowledge of the atom. This application can be in any field of your choice. This means the field can be scientific, such as medicine, or nonscientific, such as entertainment. The purpose of this assignment is to learn the ...
December 30, 2014

physical science
For questions #14 – 16, write an equation for the reaction of magnesium oxide with sodium chloride to produce magnesium chloride and sodium oxide. 14. Show the formulas of the reactants. 15. Show the formulas of the products. 16. Write the balanced the equation for this ...
December 20, 2014

Finance
Fjord Luxury Liners has preferred shares outstanding that pay an annual dividend equal to $7 per year. If the current price of Fjord preferred shares is $94, what is the after-tax cost of preferred stock for Fjord?
December 11, 2014

math
A company rents its care for a daily fee, plus an additional charge per miles driven. Trip one is 4 days, 450 miles, and cost $244.50 for the rental. Trip two is 3 days, 200 miles and cost 149.00 for the rental. Find the daily fee, and find the mileage charge. I don't know...
December 5, 2014

GEOMETRY
THE area of circle B is 25 times greater than the area of circle A. The radius of circle A is 3. What is the radius of circle B?
December 4, 2014

physics
A weightlifter has a basal metabolic rate of 64.6 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 24, 2014

College Physics
Thank you i tried doing it a million different ways but kept making a mistake somewhere i really appreciate it this truly helped me understand.
November 24, 2014

College Physics
A weightlifter has a basal metabolic rate of 64.6 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 24, 2014

College Physics
(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? 2 h (c) Calculate the amount of mechanical work necessary to lift a 126 kg barbell 2.10 m. 3 J (d) He drops the barbell to the...
November 24, 2014

physics
an ice skater applies a horizontal force to a 20 kg block on frictionless, level ice causing the block to accelerate uniformly at 1.4 m/s^2 to the right. after the skater stops pushing the block it slides onto a region of ice that is covered with a thin layer of sand. the ...
November 21, 2014

math
9i / -3+8i
November 21, 2014

Physics
A sample contains 3.5×1019 radioactive atoms with a half life of 10000 years. How many atoms are expected to decay in the first second? After waiting 10000 years, how many atoms are expected to decay in the next second?
November 20, 2014

Science 7th Grade
Ms. Sue, I promise if you help me I will never ask for help on anything ever again. I just really need help. see im in connections academy but im moving to texas and texas has wierd laws so i have to go back to public school, and i really need to get my grades up i mean i have...
November 19, 2014

math
Find all zeros. Real and Imaginary f(x)= 5x^4 + 16x^2 + 3
November 17, 2014

math
find the inverse. f(x)=√3+4
November 15, 2014

math
Find the inverse f(x)= -2+7
November 14, 2014

math
(2+3i) / (4-2i)
November 14, 2014

math
Find the inverse of f(x) f(x)=3-1/2x
November 14, 2014

college algebra
2
November 14, 2014

college algebra
Find Functions with Given Zeros √2, -√2, 3
November 14, 2014

College Algebra
-6 - radical 10 / 3+8 radical 10
November 13, 2014

Math
The percentage of people not covered by health care insurance in 2003 was 15.6% (Statistical Abstract of the United States, 2006). A congressional committee has been charged with conducting a sample survey to obtain more current information. a. What sample size would you ...
November 10, 2014

calculus
The Voltage v , Current I and Resistance R are related by the equation V=IR. Suppose that V is increasing at a rate of 2 volt/sec, while I is decreasing of the rate of 1/5 (amp/sec ). Let t denote time in seconds. Find the rate at which R is changing when V=40volts and 1=2 amp .
November 8, 2014

calculus
The Voltage v , Current I and Resistance R are related by the equation V=IR. Suppose that V is increasing at a rate of 2 volt/sec, while I is decreasing of the rate of 1/5 (amp/sec ). Let t denote time in seconds. Find the rate at which R is changing when V=40volts and 1=2 amp .
November 7, 2014

Global terrorism
What effect has the 1991 gulf war had on current day terrorism ?
November 5, 2014

Chemistry
The ionic compund sometimes called yellow uranium is used to produce colored glazes for ceramics. It is 7.252% sodium, 75.084% uranium, and 17.664% oxygen a. What is the empirical formula for this compound? b. This compound has a molecular mass of 1268.06 g/mol, what is the ...
November 3, 2014

chemistry
The ionic compund sometimes called yellow uranium is used to produce colored glazes for ceramics. It is 7.252% sodium, 75.084% uranium, 17.664% oxygen? a. What is the empirical formula for this compound? b. This compound has a molecular mass of 1268.06 g/mol, what is the ...
November 3, 2014

english help repost
The Trouble with Television by Robert Mac Neil It is difficult to escape the influence of television. If you fit the statistical averages, by the age of 20 you will have been exposed to at least 20,000 hours of television. You can add 10,000 hours for each decade you have ...
November 3, 2014

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