Tuesday
February 9, 2016

# Posts by Tom

Total # Posts: 1,252

algebra
Given that XY =21 and 1 < x < 2, find the sum of the upper and lower bounds of Y. Express your answer as a decimal.
February 27, 2011

trig
if cos(pi/4) is sqrt2/2 i thought sec(pi/4) is 2/sqrt 2,but its just sqrt 2 . can some one please explain.
February 27, 2011

Algebra
The five-digit number 31d26 ----- is divisible by 3. Find the sum of all possible values of d.
February 27, 2011

algebra
Find the number of square units in the area of the region in the first quadrant which is bounded by x = 4, the y-axis, y = 2, and y = 8.
February 27, 2011

CALC
INTEGRAL OF Y^2/(25+Y^2)
February 26, 2011

world history
How did the Renaissance contribute to the Age of Exploration? by emphasizing the importance of converting people to Christianity by awakening a spirit of discovery and innovation in Europe by fostering a belief in the importance of working as a group by persuading Europeans ...
February 21, 2011

calc
find integral using table of integrals ) integral sin^4xdx this the formula i used integral sin^n xdx =-1/n sin^n-1xcosx +n-1/n integral sin^n-2 using the formula this is what i got: integral sin^4xdx=-1/4sin^3xcosx+3/4 integral sin^2xdx= -1/2sinxcosx+1/2 integral 1 dx can ...
February 20, 2011

algebra
a speaker was so boring that one-half of the audience left after a few minutes. Five minutes later, one-third of the remaing audience left. Ten minutes later, one-fourth of those remaining left, leaving only nine people in the audience. How many people were in the audience at ...
February 19, 2011

geometry
The road rose at an 8 degree angle, what is the grade?
February 15, 2011

math
A peddler is taking eggs to the market to sell. The eggs are in a cart that holds up to 500 eggs. If the eggs are removed from the cart 2,3,4,5, or 6 at a time, one egg is always left over. If the eggs are removed 7 at time, no eggs are left over. How many eggs are in the cart?
February 14, 2011

Symbolic Logic
1) Give a general proof to show that for all sentences X and Y and for every consistent set Σ of sentences, if X and Y are logical consequences of Σ, then the set {X, Y} is consistent. 2) Let C be a logical consequence of the set {P1, P2, P3} and of the set {P1, P2, ...
February 12, 2011

chemistry
at 25˚c the density of water is 0.997g/cm³,the density of ice at -10˚c is 0.917g/cm³. if a soda can volume is 240 ml is filled then frozen at -10˚c, what volume does solid occupy?
February 1, 2011

Algebra
What system of equations do I use to solve the following question? A boat traveled 336 miles downstream and back. THe trip downstream took 12 hours. THe trio back took 13 hours. What is the speed of the boat in still water What is speed of the current?
January 31, 2011

math
first find the common denominator of 6 so you get 2/6 + 5/6 then you add straight across to get 7/6 over 2/5. when you divide the fractions, take the denominator and flip it to then multiply straight across so, you have 7/6 * 5/2 = 35/12
January 31, 2011

Manufacturing
Discuss how it is possible that schools put up barriers to enrolling a child with emotional disabilities
January 30, 2011

Statistics
Given a mean of 60 and a standard divation of 7, what proportion of scores is between 45 and 78? What is the formula for determining this proportion?
January 27, 2011

Statistics
Given a mean of 60 and a standard divation of 7, what percentate of scores ae 73 or less? What is the formula for determining this value?
January 27, 2011

Algebra
Lee took a survey for the school newspaper and received the following data about the number of hours classmates studied per week: (1,2,4,5,6,8,9,10,10). Express as a common fraction the positive difference between tthe median and mean of this set of data.
January 26, 2011

trig
a plane is flying at an altitude of x with the distance at 800 meters with an angle of 70 degress. what equation would you use to solve. tan70= x/800 tan70= 800/x sin70= x/800
January 26, 2011

chemestry
an oilo slick 110 nm 1.0 * 10^6 square meters of ocean.How many liters of oil are in the slick
January 24, 2011

com/155
five sentences about the role of education in successful financial planning
January 23, 2011

Chemistry
CH3COOH + H2O = CH3COO- + H3O+ Acid acetic is a weak acid so not all of it will dissociate. The constant for acid acetic is 1.8 . 10^-5 therefore 1.8x10^-5=(x^2)/(0.2-x) x is the amount that disociated solve the equation and x is 1.88x10^-3 pH=-log(pH)=-log(1.88x10^-3)=2.72
January 23, 2011

Physics
A laser emitting at 632.8nm illuminates a double slit. A screen is positioned 2.00 m from the slits. Interference fringes are observed with a separation of 1.0 cm. (a) Determine the separation of the slits. (b) Determine the angle of the first-order dark fringes.
January 16, 2011

social studies 20-1 (URGENT)
thats the thing i do not know what these sources mean and how they relate to nationalism. if smeone explains them to me then i can do the rest myself.
January 13, 2011

social studies 20-1 (URGENT)
examine each source below and write in paragraph form, a response in which you: -interpret each source to identify and explain the perspective(s) related to Nationalism. -identify and discuss one or more ideological concepts that are refleted in the sources. -Use your knowlage...
January 13, 2011

Math
you are 70 meters from train and road crossing with the train going 60meters per second, after 4 seconds has fast is the train traveling away from you?
January 8, 2011

calc
A kite 100 ft above the ground moves horizontally at a speed of 8 ft/s. At what rate is the angle of elevation between the string and the horizontal decreasing when 200 ft of string have been let out?
January 2, 2011

chem100-1
Can eletrolysis be used to separate salt in the sea int o elemental sodium and clorine gas -- somthing like 2NaCl --> 2Na + Cl2 ?
December 28, 2010

economics
"The Fed should simply increase the money supply at the same rate that the full employment economy grows, and the government should desist from any stabilizing urges." What school of thought would make this suggestion, and how do economists of that school justify ...
December 20, 2010

physics
A car of mass 1979 kg drives over a semicircular hilltop of radius 12.6 m and through a semicircular valley of radius 17.2 m with a constant velocity of 7.28 m/s. What is the normal force on the car at the bottom of the valley? would i use the equation mv^2/r +mg ?
December 19, 2010

algebra
two runners jog around an oval path at constant rates, but in opposite direstions. one runner completes a lap every 10 minutes, and the other does a lap every 12 minutes. how many minutes elapse between consecutive meetings of the runners? express answer as a mixed number.
December 16, 2010

physics
if you exert a force of 500 N to walk 4 m up a flight of stairs in 4 s, how much
December 15, 2010

math
Six people are going to be seted in a row of 8 chairs. How many different ways may they be seated?
December 15, 2010

help me please physics
A monatomic ideal gas expands from point A to point B along the path shown in the drawing. (a) Determine the work done by the gas. J (b) The temperature of the gas at point A is 198 K. What is its temperature at point B? K (c) How much heat has been added to the gas during ...
December 10, 2010

Physics
1.2x2x34/30 Distance between two crest points is 1.2x2 Distance between 35 crest points is 1.2x2x34. Note a crest is a point. One may not measure the time duration of a crest point. I've just noted that waves and crests are both used in such problems. The total distance is...
December 6, 2010

honors physics
A 3.2 kg block is hanging stationary from the end of a vertical spring that is attached to the ceiling. The elastic potential energy of this spring/mass sytem is 2.1 J. What is the elastic potential energy of the system when the 3.2 kg block is replaced by a 5.3 kg block?
December 1, 2010

economics help
I need a specific article that deals with monopoly power, either regulated or illegal attempts at monopolization.
November 30, 2010

medical billing and coding
Your answer is in your books, you need to find the answers there. We can guide you, but you need to do the reading also.
November 28, 2010

Pen Foster Child Care
Are you looking for someone to give you tha answers to all the questions on your test ?
November 28, 2010

Physics
A satellite of mass 210 kg is launched from a site on Earth's equator into an orbit at 210 km above the surface of Earth. (a) Assuming a circular orbit, what is the orbital period of this satellite? (b) What is the satellite's speed in its orbit? (c) What is the ...
November 24, 2010

Math
Write the following fractions in increasing order: 45/44, 5/4, 12/11
November 21, 2010

algerba
A person wins 500 points in a game. What is the corresponding number?
November 21, 2010

algebra
_3r+18=6r add 3r to ech side of equation. 18=9r dived each side by 2 2=r r=2
November 21, 2010

short story, part 2
an auther's purpose in using rhetoric is to? a. create a certain effect for the reader b. present facts as they realy are c. provide hints as to whats going to happen d. seperate realism from idealism
November 17, 2010

Financial and managerial accounting
1. Use the following data for questions 1 and 2.On March 12, 2005, Trio, Inc. acquired melting equipment for \$37,000. The estimated life of the equipment is 7 years, with an estimated residual value of \$9,000.Refer to above data. In its financial statements, Trio uses straight...
November 17, 2010

Financial and managerial accounting
1. Use the following data for questions 1 and 2.On March 12, 2005, Trio, Inc. acquired melting equipment for \$37,000. The estimated life of the equipment is 7 years, with an estimated residual value of \$9,000.Refer to above data. In its financial statements, Trio uses ...
November 17, 2010

college
Doug Corporation purchased Leslie Company's entire business for \$3,200,000. The fair market value of Leslie's net identifiable assets is \$2,900,000.
November 16, 2010

interest rate
what must the interest rate be if an investment is to double its value in 15 years, compounded monthly in decimal form, rounded to 3 significant figures
November 13, 2010

compounded interest
calculate the future value of an investment of \$8,500 if it is to be invested for 9 years at an interest rate of 6.1%, compounded quarterly.
November 13, 2010

physics
if you exert a force of 500 N to walk 4 m up a flight of stairs in 4 s, how much power do you use?
November 11, 2010

Chemistry
How many atoms of carbon are found in 5.94 grams of acetic acid?
November 9, 2010

Social Studies
What countries are neighbors with brazil.
November 8, 2010

Social Studies
Name the industries in brazil
November 8, 2010

Social Studies
Who are the leaders in brazil and their position and name
November 8, 2010

Social Studies
What are the issues in brazil
November 8, 2010

Social Studies
What type of people live in brazil
November 8, 2010

Calculus
How do you find the area under the witch of agnesi? (for all radii)
November 6, 2010

Statistics
An insurance company estimates 40 percent of its claims have errors. The insurance company wants to estimate with 90 percent confidence the proportion of claims with errors. What sample size is needed if they wish to be within 5 percent of the actual?
November 5, 2010

physics
A baseball is hit at ground level. The ball reaches its maximum height above ground level 2.6 s after being hit. Then 2.1 s after reaching its maximum height, the ball barely clears a fence that is 96.4 m from where it was hit. Assume the ground is level. (a) What maximum ...
November 3, 2010

physics
A rifle that shoots bullets at 460 m/s is to be aimed at a target 47.0 m away. If the center of the target is level with the rifle, how high above the target must the rifle barrel be pointed so that the bullet hits dead center? (Neglect air resistance.)
November 3, 2010

physics
A soccer player kicks the ball toward a goal that is 28.6 m in front of him. The ball leaves his foot at a speed of 18.5 m/s and an angle of 30.6° above the ground. Find the speed of the ball when the goalie catches it in front of the net. (Note: The answer is not 18.5 m/s...
November 3, 2010

physics
A diver springs upward from a board that is three meters above the water. At the instant she contacts the water her speed is 9.00 m/s and her body makes an angle of 71.0° with respect to the horizontal surface of the water. Determine her initial velocity, both magnitude ...
November 3, 2010

statistics
Scores on the Stanford Binet Intelligence Scale (SBIS) are distributed as normal with a mean of 100 and a standard deviation of 16. Use the probabilities under the Normal Curve to answer the following questions. a. A child scored 84 on the SBIS. What is his z score? -1 b. What...
November 1, 2010

STATISTIC
Mrs. Carlson has discovered that the students in her class who watch a larger amount of television do more poorly on her exams compared to those who watch a smaller amount of television. Which of the following conclusions can Mrs. Carlson draw? Explain your answer. a. Watching...
November 1, 2010

Chemistry
I need help with What is the solubility of silver oxide, Ag2O, in a solution buffered at pH 10.50? The Kc for the following equilibrium is 2.0 x 10-8. Express your answer in g/L Ag2O(s) + H2O(l) ¡ê 2Ag+ (aq) + 2OH- (aq)
October 25, 2010

college
Organic chemistry question. I need help with a couple of questions on organic groups. What are some products that contain: Alkynes, Aromatic (benzene), Ethers, Aldehydes, Ketones, and Acids. I also need to know some of the harmfull effects that each one of them can cause.
October 24, 2010

physics
h=49.62m 49.62m-11m for the wall clear of the top = 38.62 4.9 its from multiplying 1/2(-9.8m/s^2) 1/2(ay)
October 24, 2010

bilogy
paper explaining how the organism in the diagram has evolved physiologically to become suited to its environment. Make sure to reference the diagram you located in your paper.
October 20, 2010

HELP
I run I jump I am one of four you find me hanging around your door
October 17, 2010

Phyics
It is it physical science and the equations nedd to be balanced.... it just how the format is on the computer
October 16, 2010

physics
Four people, each with a mass of 72.7 kg, are in a car with a mass of 1110 kg. An earthquake strikes. The driver manages to pull of the road and stop, as the vertical oscillations of the ground surface make the car bounce up and down on its suspension springs. When the ...
October 16, 2010

algebra
-63 +15s = 14s + 18
October 14, 2010

Probability
Are theses correct: A 25 percent B 12 percent C 26 percent And, I have no idea how to get D
October 14, 2010

Probability
A survey finds that 38% of kids like tv, 24% like radio, and 13% like both. A.Find percent of kids that like tv but not radio. B.Find the percent of kids that like neither tv or radio. C.Find the percent of kids like either tv or radio D.Find the conditional probability that a...
October 14, 2010

Math
A survey finds that 38% of kids like tv, 24% like radio, and 13% like both. A.Find percent of kids that like tv but not radio. B.Find the percent of kids that like neither tv or radio. C.Find the percent of kids like either tv or radio D.Find the conditional probability that a...
October 14, 2010

world history
Herodotus (c. 450 BC) I am needing help ansering a few question I can not locate an answer to. How is a colonizing expedition planned and organized and who goes on it? Do the variant stories recorded by herodotos disagree? What is the political organization/government of this ...
October 12, 2010

English
I need to write an essay on "What are rules for our everyday Life, and why do we have them". It also needs to include why some people love rules and others destest them. I am looking for help with a list of rules for everyday life.
October 10, 2010

algebra
the time that a traffic light remains yellow is 1 second more than 0.05 times the speed limit. what is the yellow time for a trafic light on a street with a speed limit of 30 mi/h?
October 9, 2010

Math
i times them by 4 and 5 as you said and got 20x + 12y = 123 21x + 12y = 246ã2 added together 21x = 123+246ã2 is this right and if so can you help me get the next parts as i have tried but cant figure it out thanks
October 2, 2010

Math
Simultaneous equation and surds 5x-3y=41 (7route2)x+(4route2)y=82
October 2, 2010

computers
With newer Linux kernel distributions, what happens if you connect a hot-swappable device, such as a USB drive, containing evidence?
September 29, 2010

what is the given value of the variable a+4 diveded by 8 a=3.75
September 23, 2010

Homework Help Forum: Algebra-Please help-I'm confused Posted by Tom on Tuesday, September 21, 2010 at 8:09pm. This deals with quadratic functions-If I have a graph with h = (-5)and k =3 and they ask for the translation, would it be {5,3} or would the translation just be {-...
September 22, 2010

Physics
HELP! I'm doing a webassign, and am completley lost on these problems. If you could help with any, that would be great. A crate weighing 9.40 103 N is pulled up a 36° incline by a force parallel to the plane. If the coefficient of kinetic friction between the crate and...
September 22, 2010

There wasn't anymore. They show an upward parabola graphed with vertex h=(-5) and K=(-5) and they ask what is the translation in terms of h and k of the following graph. Possible answers: h=5, k=5 h= -5, k=5 h= -5 and k=-5 h=5 and k= -5 That's why I asked do I just ...
September 21, 2010

This deals with quadratic functions-If I have a graph with h = (-5)and k =3 and they ask for the translation, would it be {5,3} or would the translation just be {-5,3} Do you take the opposite of the number when it is transalated from the graph or do you only take the opposite...
September 21, 2010

Algebra
This deals with quadratic functions-If I have a graph with he = (-5)and k =3 and they ask for the translation, would it be {5,3} or would the translation just be {-5,3} Do you take the opposite of the number when it is transalated from the graph or do you only take the ...
September 21, 2010

Algebra II
This deals with quadratic functions-If I have a graph with points h=-5, k =3 and they ask for the translation, would it be {5,3} or would the translation just be {-5,3}
September 21, 2010

physics
Consider again the problem of a car traveling along a banked turn. Sometimes roads have a "reversed" banking angle. That is, the road is tilted "away" from the center of curvature of the road. If the coefficient of static friction between the tires and the ...
September 21, 2010

physics
I DONT KNOW WHAT IM DOING WRONG!!!!!!NASA has built centrifuges to enable astronauts to train in conditions in which the acceleration is very large. The device in the figure below shows one of these "human centrifuges." If the device has a radius of 8.3 m and attains...
September 21, 2010

physics
No, How many seconds in advance would a plane traveling 200 km/hr need to drop supplies to his a target 110 meters below before they were over it?
September 21, 2010

physics
plane traveling 200 km/hr with supplies for people 110 meters below. how many second before do they have to drop the supplies
September 21, 2010

Physics
A 1500 kg automobile travels at a speed of 105 km/h along a straight concrete highway. Faced with an emergency situation, the driver jams on the brakes, and the car skids to a stop. (a) What will be the car's stopping distance for dry pavement (µ = 0.85)? (b) What ...
September 21, 2010

physics
A 1500 kg automobile travels at a speed of 105 km/h along a straight concrete highway. Faced with an emergency situation, the driver jams on the brakes, and the car skids to a stop. (a) What will be the car's stopping distance for dry pavement (µ = 0.85)? (b) What ...
September 20, 2010

Finance
I need to write an essay on if I think producing more money will help or hurt my local economy. The essay needs to clearly state the reasons behind my theory on how much money I should produce for my economy. It also needs to have one internet site that supports my thought ...
September 18, 2010

Economics
I need to complete a project based on fiat money. I need to design my own money and decide what amount of bills and/or money I want to produce for my economy. I understand that producing more money causing inflation, but I need to know: How much money I should intially produce...
September 17, 2010

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