Sunday
February 7, 2016

Posts by SaRa

Total # Posts: 4,234

Geography
Draw a table like the one below into your exercise book. With reference to the Simple model of an ecosystem (on page 2), suggest possible ways that each of the components of an ecosystem can influence each other. Climate Vegetation Fauna Landforms & Drainage Soils Climate ...
February 6, 2016

chem
use atomic theory to explain why chemical reactions obey the law of conservation of mass
February 4, 2016

Math
Joe spends $8 on lunch and $6.50 on dry cleaning. He also buys 2 shirts that each cost the same amount. Joe spends a total of $52. What is the cost of each shirt.
February 3, 2016

math
a 6-pack of under shirts costs $13.98. This is $3.96 less than the cost of buying 6 individual shirts. if each undershirt costs the same amount, how much does each undershirt cost when purchased individually?
February 3, 2016

Chemistry
In a sample of 100 liters of air a city's 2x10^-8 L of the pollutant SO2. How many ppm by volume ?
February 3, 2016

Economics
Luis’s utility function is u=x^.4y^.6 Suppose that Luis wants to get 60 utils, provide 4 bundles with which he can achieve that level of utility. Please explain
February 1, 2016

Economics
Can you check my answer Consider an individual with a utility function of the form: U(x,y)=xy , and where m=1, px=2, and py=3 , where m is the individual's income or wealth, pi is the price of good i. Calculate the individual's optimal consumption bundle, (x,y) = (...
February 1, 2016

math
plot sin(1*pi*1000t) +2 where v(t) =1 what does this plot for two periods look liek
February 1, 2016

Chemistry
In the preparation of one liter of 2.5 M HCl solution, what is the volume of HCl concentrated (37% w / w, d = 1.19 g / ml) to be used?
January 31, 2016

Civics
What are some common laws I really don't get this can someone explain it to me?
January 27, 2016

Math
A circle is divided into 8 equal parts. What is the total angle measure of 4 parts?
January 20, 2016

chemistry
The titration of 5.40 mL of a saturated solution of sodium oxalate, Na2C2O4, at 25∘C requires 29.4 mL of 2.200×10−2 M KMnO4 in acidic solution. What mass of Na2C2O4 in grams would be present in 1.00L of this saturated solution?
January 18, 2016

Electrical Engineering
Technically it could be either...
January 15, 2016

ECE
Assume that a device exists between two nodes A and B of a circuit and that the voltages of these two nodes A and B are equal to 2V and -3V respectively What is the voltage drop across the device? So I think I just go A-B , but it might also be B-A so either 5 or -5. im not ...
January 15, 2016

math [last]
m= 1/2 and y-intercept is 7. so x= 1/2x + 7
January 14, 2016

math [last]
Write the equation of the line with the given slope and y-intercept. slope = 1/2 y-intercept = 7 A)y = 7x + 1/2 <-- or is it C? B)y = 1/2x + 7 C)x = 7y + 1/2 D)x = 1/2y + 7
January 14, 2016

math
no wait is 2x+4.
January 14, 2016

math
@bobpursley thanks. @Damon so the 2nd one is B, and for the first one its B. -2x + 4
January 14, 2016

math
A line crosses the y-axis at (0,4) and has a slope of -2. Find an equation for the this line. A) y = 2x + 4 B) y = -2x + 4 C) y = -2x - 4 D) y = -4x + 2 <-- 6)Write the equation of the line with the given slope and y-intercept. slope = 5 y-intercept = 8 A) y = 5x + 8 B) x...
January 14, 2016

math
Thank you, I'm so not good at this.
January 14, 2016

math
A line has a slope of 1/2 and passes through the point (0,5). What is the equation of the line? A) y = 1/2x + 5 B) y = 1/2x - 5 C) y = 5x + 1/2 D) y = -5x + 1/2 How do i figure this out? is it D?
January 14, 2016

Math
D. I'm sorry Im new to this math and its so hard.
January 14, 2016

Math
A line passes through the point (0, 5) and has a slope of -1/2. Which is the equation of the line in slope-intercept form? A) 2x + y = 7 B) y = 3x + 5 C) y = -2x + 7 D) y = -1/2 x + 5 B?
January 14, 2016

physics
A homogeneous rod AB=100 cm of mass m=4kg is suspended from a fixed roof by means of two very light strings OA and O'C having the same length point C is at 20cm from B , rod AB is in a horizontal position of equilibrium Make the inventory of the forces acting on the rod AB.
January 13, 2016

English Grammar
Hi, I'm writing an English essay and I was wondering which sentence is grammatically correct. 1)The individual rights to speak are taken from John and Mary or 2) The individual's right to speak are taken from John and Mary
January 4, 2016

Statistics
The coefficient of correlation between the age and blood pressure of a sample of 8 persons was found to be +0.8, the average age is 50 years and average blood pressure is 60. Their standard deviations were 5 and 10 respectively. a) Obtain the two regression equations b) find ...
January 2, 2016

Science - Chemistry
If vapour pressure of water is 17.5 torr at 20C, what is the water vapour pressure inside a bottle of 100 proof whiskey? 100 proof = 50% ethanol Total volume = 1 L Mass of ethanol = 394.5g Mass of water = 500g Density of ethanol = 0.789g/mL Moles of ethanol = 8.58 mol Moles of...
December 30, 2015

science,physics
i do not understand this question and by the way this is not my homework. Reggie sets out from home on his bicycle.First he goes to the shop, which is 500 m away, he then rides to his friend's house which is a further 1200m.He then returns home. what total distance has ...
December 30, 2015

Math
Jake ate 3/8 of a pizza and spent $4.00 on french fries .Bill ate the other 5/8 of a pizza and spent $1.50 on a drink. Their bills were equal. How much did the whole pizza cost?
December 14, 2015

physics
A skier (m=55.0 kg) starts sliding down from the top of a ski jump with negligible friction and takes off horizontally. If h = 4.90 m and D = 10.6 m, find H.
December 9, 2015

central middle
In September, the ratio of the amount Ray spent and the amount he saved was 4:1. In October, he got a salary raise. He increased his spending by 25% but save the same amount. Find the new ratio. Is it 5:1?
December 7, 2015

physics
A 48-kg girl stands on a 8-kg wagon holding two 19.5-kg weights. She throws the weights horizontally off the back of the wagon at a speed of 9.0 m/s relative to herself. Assuming that the wagon was at rest initially, what is the speed with which the girl will move after she ...
December 5, 2015

Social Studies
During the late 1900's a global economy developed as foreign trade and multinational corporation grew?
December 2, 2015

Social Studies
JUST HELP ME!! YOUR A TEACHER FOR GOD'S SAKE!!
December 2, 2015

Social Studies
WHAT DO YOU MEAN?????
December 2, 2015

Social Studies
I NEED HELP!!!!!! During the late 1900's a global economy developed as foreign trade and multinational corporation grew? PLEASE IM BEGGING FOR HELP!!!! DESPERATE FOR HELP!!!!!
December 2, 2015

precalculus
Thanks Steve!
December 2, 2015

precalculus
A farmer needs to build a rectangular pen that is 800 square feet and has two bays. What equation can he use to minimize the cost of the fence and what are the dimensions of the pen?
December 2, 2015

Chemistry
In which of the following substances does sharing of electrons between two atoms occur? He Nal PO43– Ag
December 1, 2015

Chemistry
Which of the following elements is least likely to form a cation that will then form an ionic bond with an ion of a Group 7A element? S K Rb Fr
December 1, 2015

Chemistry
Which of the following is a bond in which a metal transfers one or more electrons to a nonmetal? ionic bond hydrogen bond metallic bond covalent bond
December 1, 2015

Chemistry
The ionization energies (kJ/mol) of hydrogen (H), nitrogen (N), sodium (Na), and oxygen (O) are 1,312, 1,402, 1,681, and 1,314, respectively. Which element combination is least likely? OH– NO3– NH4+ NaO–
December 1, 2015

Chemistry
Which of the following is a monatomic cation? Br NH4+ SO42– Fr+
December 1, 2015

Chemistry
Which of the following elements is most likely to form an ion that will then form an ionic bond with an ion of a Group 1A element? Pt I Fr Be
December 1, 2015

mechanics
The angled beam ABC in the figure is composed of segments AB and BC joined at B at a 90˚ angle. Both segments have length L and uniform section stiffness EI. The beam is fixed at C and loaded by a downward concentrated force, P, applied at its free end A. You will use ...
November 30, 2015

mechanics
Beam ABC in the figure is composed of segment AB of length L and uniform section stiffness EI joined to segment BC of length L and uniform section stiffness 2EI. The beam is fixed at C (x=2L) and loaded by a downward concentrated force, P, applied at its free end A (x=0). You ...
November 30, 2015

chemistry
When a 10 g sample of copper oxide is reduced by heating in the presence of carbon monoxide, how many moles of copper are formed?
November 28, 2015

English
I have to write a compare and contrast essay on "the pedestrian ,"the murderer" , and "there will come soft rains" - I need help choosing 3 things to compare in each story
November 22, 2015

Chemistry
What properties do metalloids display, and where are metalloids found on the periodic table?
November 19, 2015

Chemistry
Why did Mendeleev leave gaps in his early periodic table, and what was the ultimate importance of the gaps?
November 19, 2015

Physics
The following calculations are for EM radiation, for which the internal energy U=Vu, where u=u(T)is the total energy density. a) Show that (∂S/∂T)_v=V/T(du/dT), and (∂S/∂V)T=(u+P)/T Note: use the answers in part a in part b and c b) Using Stefan-...
November 19, 2015

Physics
The following calculations are for EM radiation, for which the internal energy U=Vu, where u=u(T)is the total energy density. a) Show that (∂S/∂T)_v=V/T(du/dT), and and (∂S/∂V)T=(u+P)/T Note: use the answers in part a in part b and c b) Using Stefan-...
November 19, 2015

Physics
The following calculations are for EM radiation, for which the internal energy U=Vu, where u=u(T)is the total energy density. a) Show that (∂S/∂T)_v=V/T(du/dT), and and (∂S/∂V)T=(u+P)/T Note: use the answers in part a in part b and c b) Using Stefan-...
November 19, 2015

Geometry
The measure of each interior angle in a regular hexagon is?
November 18, 2015

AP Human Geography
1. What role does migration play in the geographic pattern? 2. How about interaction & isolation after migration takes place? 3. When do dialects begin to become so different that they may be viewed as a different language? 4. How has the Internet contributed to the ...
November 18, 2015

Science
Tellurium is a metalloid. How many valence electrons does tellurium have? 3 4 5 6
November 17, 2015

Science
Which of the following shows three elements in order of increasing conductivity? Ge, O, Mn O, Ge, Mn Mn, O, Ge Mn, Ge, O
November 17, 2015

Science
Inner transition metals are composed of which of the following? metals lanthanides and actinides halogens noble gases
November 17, 2015

Science
Which of the following is a characteristic of nonmetals? Nonmetals are often brittle solids. Nonmetals are often malleable. Nonmetals often conduct electricity. Nonmetals are often ductile.
November 17, 2015

Math
20 times 4 because there is 4 sections per acre so 80 in total.
November 17, 2015

Accounting
In the table given below, reconstruct the remaining information using the available data. [ WHERE THE X's ARE] All of the raw material purchased during the period was used in production. (Indicate the effect of each variance by selecting "Favorable" or "...
November 17, 2015

algebra
The revenue achieved by selling x graphing calculators is figured to be The cost of each calculator is How many graphing calculators must be sold to make a profit (revenue - cost) of at least $466.20?
November 16, 2015

algebra
In one U.S. city, the quadratic function models the median, or average, age, y, at which men were first married x years after 1900. In which year was this average age at a minimum? (Round to the nearest year.) What was the average age at first marriage for that year? (Round to...
November 16, 2015

algebra
The owner of a video store has determined that the cost C, in dollars, of operating the store is approximately given by where x is the number of videos rented daily. Find the lowest cost to the nearest dollar.
November 16, 2015

algebra
The sum of 9 times a number and the reciprocal of the number is positive. Find the numbers which satisfy this condition
November 16, 2015

Algebra
An arrow is fired into the air with an initial velocity of 96 feet per second. The height in feet of the arrow t seconds after it was shot into the air is given by the function Find the maximum height of the arrow.
November 16, 2015

Algebra
You drive 129 miles along a scenic highway and then take a 29-mile bike ride. Your driving rate is 4 times your cycling rate. Suppose you have no more than a total of 5 hours for driving and cycling. Let x represent your cycling rate in miles per hour. Write a rational ...
November 16, 2015

math
what is the rate of this ratio in its lowest term - 48 gallons in 14 mins
November 14, 2015

math
Find the inverse of the function f(X)= 2x^2 - 3
November 11, 2015

Chemistry
How to I find the spectator ions of BaCl2+K2SO4->2KCl+BaSO4
November 9, 2015

english
It is always ___ who pays the bill. he her me us would it be he?
November 7, 2015

Math
Thank you this makes sense now!
November 6, 2015

Math
If four times the square of a positive number is added to the product of -29 and the number, the result is 63. Find the number
November 6, 2015

Chemistry
What is the molarity of a solution prepared by placing 7.2 g of glucose in a volumetric flask and adding water to get 250.0 mL of solution?
November 6, 2015

chemistry
IDK what that means??????
November 2, 2015

chemistry
if 40g of KNO3 is dissolved in 100ml water at 25 C WHAT WILL FINAL TEMP BE? SHOW ALL WORK
November 2, 2015

SOC 320
Ha Ha
October 25, 2015

Science
If an ion has 12 protons in its nucleus and 10 electrons outside the nucleus, what is the overall charge on the ion? +2 –2 –1 +1
October 25, 2015

Statistics
the answer will be Q1 (5) Q2 (0.754) Good Luck :)
October 19, 2015

College Algebra
The equationS = 1.3x + 6.4 represents the amount of sales of statin in billions of dollars in 2005. a. According to this equation, people in the U.S spent ---- billion dollars on statins in the year of 2011. b. According to this equation, sales of statin will reach 20.41 ...
October 18, 2015

Health science
Thank you very much I am very sorry for your lost
October 17, 2015

Health science
Make lists of factors that makes your lives stressful and explain how each impacts your physical health and fitness. Please help I'm confused
October 17, 2015

physics
A 330 kg box rests on an adjustable ramp having s = 0.25. The angle on inclination of the ramp is increased until the box begins to slide. At what angle will the box begin to slide?
October 15, 2015

Chemistry
Which of the following procedures involves a physical change in one of the substances? separating an oil from solution by cooling it<--- my answer allowing a nail to rust creating salt by reacting sodium metal and chlorine gas building a model rocket propelled by mixing ...
October 13, 2015

Spanish
Como tu eres? Como es ella/el?
October 9, 2015

Music
Which is an accurate statement? A high pitch will have a high amplitude. A low pitch will have a high frequency.<--- my answer A high pitch will have a high frequency. A low pitch will have a low amplitude.
October 6, 2015

Music
Which term names a musical parameter? tempo notation<----- My answer variation theme
October 6, 2015

Music
What is orchestration? A composer creates various themes in a composition. A composer writes a piece of music. A composer assigns different musical lines to different instruments in a piece of music.<---- My answer A composer weaves different themes into a symphony.
October 6, 2015

Music
Which term is used when a composer shortens a motive by using only part of it or by taking away notes? fragmentation<----- My answer decrescendo theme repetition
October 6, 2015

Geometry
Is a triangle with vertices G(3,2), H(8,5) and K(0,10) a right angle. explain plss, pls. very imp.
October 5, 2015

biology
You are preparing 500 mL of Denaturation Buffer containing 1.5 M NaCl and 0.5 M NaOH. Your stock solutions are 5 M NaCl and 6 M NaOH. How would you prepare the Denaturation Buffer? Include all of the solutions needed to make the buffer. For Nacl, C1V1=C2V2 5*V1=500*1.5 V1=150 ...
October 5, 2015

Algebra 2
Evaluate 4-1.5 using a calculator. Round you’re answer to 3 decimal places
October 4, 2015

math
Do 4 1/2 times 3 1/2, because you have to do the opposite operation to get the missing number.
October 1, 2015

Sequences and Series
use the iterative rule to find the eighth term in the sequence an = 25 − 3n. 176 49<------ My answer 8 1
October 1, 2015

English
A sub-genre that is often concerned more with style and theme than with plot is called: literary fiction<---- My answer magical realism short story psychological fiction
September 30, 2015

History
Which of the following describes a Hindu concept? A shadowy afterlife follows death. The soul is reincarnated after death. God has the same faults as humans. There is one all-powerful god.
September 30, 2015

Math
Which statement is false? A: Every integer is a real number. B: the number zero is a rational number. C: every irrational number is a real number. D: every real number is a rational number****
September 29, 2015

Math
f(x) = log2(x – 3) + 1. How do I find the Domain and Range?
September 29, 2015

health
Digestion, absorption, elimination
September 29, 2015

Math Help
Which binomial is a factor of f(x) = x^4 – 3x^3 – 28x^2 + 36x + 144? (x – 4) (x + 3) (x – 2) (x – 6) I think its the 4th one
September 28, 2015

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