Questions Asked on
February 2, 2010

Physics
A ball is thrown straight downward with a speed of 0.50 m/s from a height of 4.0 meters. What is the speed of the ball 0.70 seconds after it is released? GIVEN: Vi = 0.50 m/s Vf = ? d = 4 m t = 0.70 s

Chemistry
A sample of oxalic acid, H2C2O4, is titrated with standard sodium hydroxide, NaOH, solution. A total of 45.2 mL of 0.12 M NaOH is required to completely neutralize 20.0 mL of the acid. What is the concentration of the acid? Concentration is Molarity, which

Chemistry
You and another student were each given an unknown compound. Both samples contained colorless material. You each used the same brand of commercially prepared TLC plate and developed the plates using the same solvent. Each of you obtained a single spot of

chemistry
How much ethylene glycol (C2H6O2, the major component of antifreeze) must be added to 1 L of water to keep it from freezing at 16 oC?Kf = 1.86 oC/m.

Biology
a) What is a major structural advantage that eukaryotic cells have over prokaryotic cells? Why is this so important? My answer: The organelles in eukaryotic cells allow them to perform more complex functions than prokaryotic cells, which don't have these

math
how do i write 53 hundredths as a decimal.

Chemistry
Write the mechanism for (E)25dimethylhex3ene and bromine? Assign the R, S configuration for each of the products and determine the stereochemical relationship of each set of products. I think the products will be trans but I am not quite sure how the

math
how can you use the product of 108 and 4 to find the product of 324 and 4?

calculus
consider the area enclosed between the curves f (x) = x2 and g (x) = 4x what is the volume obtained by revolving the area between these two curves around the line y = 20 ? please help, i don't know what to do

history
How did the minority groups' struggle for civil rights begin in the 1950s? Which event from this time do you think was most responsible for bringing public attention to the American Civil Rights Movement? Explain why you selected this event.

algebra
what is 8gal7qt minus 3gal 2qt?

Mathematicas
What generalizations can you make about the temperature that is read on the thermometer and the heat index?

ethics
The rising number of uninsured patients has led to an increased reliance on the hospital emergency room for routine nonemergency care. The EMTALA is an example of a law that impacts who must be seen when presenting to the emergency room seeking care. How

medical coding
Explain how evaluation and management (E/M) codes are grouped

chem
A 250 mL sample of oxygen is collected over water at 25 degrees Celcius and 760.0 torr pressure. What is the pressure of the dry gas alone?

3rd grade
Samantha says 1+1+1=3 cannot be written as a multiplication sentence because there are no equal groups. Do you agree? Explain

math anaylsis
does this have no solutions? 5sin3x=2??

algebra
Carlos Martin received a statement from his bank showing a balance of $56.75 as of March 15th. His checkbook shows a balance of $87.37 as of March 20. The bank returned all the cancelled checks but two. One check was for $5.00 and the other was for $13.25.

Calculus/physics
Calculate the work (in joules) required to pump all of the water out of the tank. Assume that the tank is full, distances are measured in meters, and the density of water is 1,000 kg/m^3. Water exits from a small hole at the top of the rectangular box. The

college
A tortoise can run with a speed of 0.10m/s and a hare can run 20 times as fast. In a race, they start at the same time, but the hare stops to rest for 2.0min. The tortoise wins by a shell (20cm). How long does the race take? What is the length of the race?

Physics
An airplane lands and starts down the runway at a southwest velocity of 41 m/s. What constant acceleration allows it to come to a stop in 1.3 km?

math1
56 students is 70% of how many students? i think it is 39.2?

Calculus
R is the region in the plane bounded below by the curve y=x^2 and above by the line y=1. (a) Set up and evaluate an integral that gives the area of R. (b) A solid has base R and the crosssections of the solid perpendicular to the yaxis are squares. Find

sew
What would life be like without Textiles

math
Decide whether perimeter or ares would be used to find the quanitity of track needed for a tabletop railroad. i think area.

physics
An airplane lands and starts down the runway at a southwest velocity of 44 m/s. What constant acceleration allows it to come to a stop in 1.3 km?

physics
A car is speeding up and has an instantaneous velocity of 1.0 m/s in the +xdirection when a stopwatch reads 10.0 s. It has a constant acceleration of 2.0 m/s2 in the +xdirection. (a) What change in speed occurs between t = 10.0 seconds and t = 13.0 s?

science
Explain why carbon can form so many organic compounds?

Math
You have a 7liter, and an 11liter container with no markings on them. Both are empty. You may fill up any of them from the water faucet any number of times, you may empty any of them any time, and you may pour water from one container to the other any

Physics II
A block begins to slide down a ramp after being elevated to an angle of 55 degrees. What is the coefficient of static friction?

Chemistry
50 mL of 1M silver Nitrate is combined with 25 mL of 2 M potassium Chloride. What is the concentration of a resulting solution

algebra
true or false? A Aquarium which is 4ft x 5ft x 3ft high can hold 800 gallons of water. (assume that one cubic foot of space holds 7.5 gallons of water)

physics
what is the downward force of the atmosphere on the top of your head right now. Assume your head has an area of .025 m^2

Language Arts
What are some articles on "Hate Crimes" do to Race, Religion, Sex, Ethnic Background...etc.?

chemistry
is it possible to change both the pressure and the volume of an ideal gas without changing the average kinetic energy of the molecules?

business
why di business systems still need more development

Math
Find an equation of a plane through the point (2, 1, 0) which is parallel to the plane 1x2y+4z=7.

calculus
find the volume of the solid formed by revolving the region bounded by the graphs of y=x^3,y=1, and x=2 about the xaxis using the disk method. 9 express the answer in terms of pie) i got the answer to be 3/5 pie but im not sure if is right. i used the

physics
You throw a ball straight up at 25 m/s. How many seconds elapse before it is traveling downward at 13 m/s? 1 s

physics
is it possible to change both the pressure and the volume of an ideal gas without changing the average kinetic energy of the molecules?

phsycology
How can I find information aboutlawrence kohlbergs educational history and social backround?

chemistry
if 200.g of water at 20 degrees celsius absorbs 41840 j of energy, what will its final temperature be?

algebra
5x42x+1=8x+2

Social Science
What does race and ethnicity mean?

algebra
A population of wolves in a county is represented by the equation P(t) = 80(0.98)^t, where t is the number of years since 1998. Predict the number of wolves in the population in the year 2008.

organic chem
Suppose you need to extract an organic substance S from water into ether, where the distribution constant Kdist = [S]org/[S]aq is at first unknown. a) By testing the solubility of the material in each solvent under saturating conditions at room

geometry
A graphic artist is designing a poster to advertise a modern art exhibit. The area of the rectangular poster must be greater than 0 square inches, but no more than 96 square inches. If the length of the poster is 12 inches, then which expression defines

organic chem
a. One can use pH differences to separate basic substances from nonbasic ones. Which of the following would be suitable for use in the aqueous phase to achieve the separation of phenol from naphthalene: K2HPO4, K3PO4, (CH3)3NHCl, (CH3)3N, NaHCO3, Na2CO3?

biology
Name at least 3 useful purposes for bacterial endospores. I have only 2, which are: produce antibiotics and produce toxins that kill insects. Also, how is the spore location within the cell used to differentiate species? All I could find is that the

childhood
Fouryearold Jacob comes from a family in which hypertension is common. It's probable that Jacob will need a diet that's low in A. fats. B. iron. C. salt. D. sugar. My answer correct is A

math
Which fraction would fit between the two fractions in the garden below?

american literature
explain how Poe develops the creepy tone and builds the suspense in The Tell Tale Heart. REALLY NEED HELP

Physics
I really need help with only this two problems. 1. A 6.0 kh block, sliding to the east across a horizontal, frictionless surface with a momentum of 30 kg*m/s^, strikes an obstacle. The obstacle exerts an impluse of 10 N*s to the west on the book. The speed

physics
I have these problems that I keep doing and keep missing. If someone could please help me with what I am doing wrong! Two charges, 25 µC and +15 µC, are fixed in place and separated by 3.4 m. (a) At what spot along a line through the charges is the net

biology
Name at least 3 useful purposes for bacterial endospores. I have only 2, which are: produce antibiotics and produce toxins that kill insects. Also, how is the spore location within the cell used to differentiate species? All I could find is that the

Finance
Dahler Corporation has just issued a bond with a maturity of 20 years, coupon rate of 10.25%, and a market price of $1330.25. Dahler makes semiannual coupon payments. a) what is the YTM expressed as a quoted rate based on semiannual compounding? And what

trig
Determine a pair of coterminal angles in radian measure to the angle pi over 2

English
Can you please tell if the word choice is correct and how I can improve it? In particular, I'd like you to consider the words in parentheses, too 1) I spent the first days of my Christmas holidays doing homework and studying 2) During the first weekend of

BCU
Participants in an exercise program gradually increase the time they exercise. The first week, they exercise 10 minutes per day. Each week after that, they increase their exercise time by 50%, until they are exercising at least 30 minutes or more per day.

french
sous mon grande pere

Math
It's time to plant a spring vegetable garden 1/3 will be root plants, 1/3 will be stalk plants, and 1/3 will be vine plants. 1/2 of the stalk and vine plants will be grown organically without fertilizer. What fraction of the garden will be grown

math
how do i determine how many people are in a family including mom and dad if 1/2 of family is male children and 1/3 of family is female children? What formula do i use to find my answer?

Science
Should humans strive to preserve a representative sample of all biomes or aquatic zones? Why should humans be concerned with the extinction rate?

physics
There's a problem my professor assigned, but I'm not sure which equation/process I should use to solve it. Please help. Two particles having charges of 0.420nC and 15.1nC are separated by a distance of 1.50m. At what point along the line (in m from the

mathcal.
find the volume of the solid formed by revolving the region bounded by the graph of y=2x^2+4x and y=0 about the y axis ( express the answernin terms of pie)

math
i just started this semester of math and i don't remember that if your adding mixed fractions are you supposed to chage it into an improper fraction to add it?

Algebra
Hi, could someone advise me on how to simplify the following,3m85m+10 and 2(4y1)+5y(32y), thanks

math
how do you convert a fraction into a decimal? and vice versa?

Algebra
(3 x 8)2 + (3+6)=17, I need a word problem to match the equation and am stumped, could you please help

math
why are bacteria bad at math? its a worksheet.

ethics
The rising number of uninsured patients has led to an increased reliance on the hospital emergency room for routine nonemergency care. The EMTALA is an example of a law that impacts who must be seen when presenting to the emergency room seeking care. How

algerbra
1 over 6 times 72 plus 2

Honors 7 grade science
2 ways that bacteria can change. (harmless to harmfull)

PHysics
A 3.00 kg object has a velocity (5.20 ihat  2.40 jhat) m/s. (Note: From the definition of the dot product, v2 = vvec·vvec.) (a) What is its kinetic energy at this time? Could some one just please show me how to convert the velocity vector into the

physics
When people sleep, their metabolic rate is about 2.6*10^4 C/(skg). How many calories does a 25kg person metabolize while getting a good nights sleep of 8 hours?

3rd Grade Math
Dave swam 6 laps and did 9 dives at the swimming pool. Crystal did 4 dives and swam 8 laps. How many more laps than dives did Crystal and Dave do?

communications
• Consider how free speech supports the right to circulate goods, services, and images in the marketplace. In addition, consider how free speech in advertising has raised concerns about advertising manipulation, especially with regard to children, teens,

chem
a. One can use pH differences to separate basic substances from nonbasic ones. Which of the following would be suitable for use in the aqueous phase to achieve the separation of phenol from naphthalene: K2HPO4, K3PO4, (CH3)3NHCl, (CH3)3N, NaHCO3, Na2CO3?

Operation Management
Determine the placement of departments for a newly designed facility that will minimize total total transportation costs using the data in the following tables Assume that reverse distances are the same. Thelocation are shown in the grid. Use a cost of $1

chem
Suppose you need to extract an organic substance S from water into ether, where the distribution constant Kdist = [S]org/[S]aq is at first unknown. a) By testing the solubility of the material in each solvent under saturating conditions at room

hsm220
I am having the worst time with this. Even after reading the material several times I a very lost. Any help would be great. The Department of Education has awarded your agency with grant funding of $1.6 million to provide training programs to high school

Social studies
How did America become a major nation?

Physics
A soccer player kicks a rock with an initial velocity of 0.50 m/s from a height of 4.0 meters. What is the speed of the ball 0.70 second after it is released? Vi = 0.50 m;s h = 4 m t = 0.70 s

MATHS
Each Sunday the hymns to be sung are displayed on a hymnboard using numbered cards. The cards have the digits 0 to 9 on them. The hymn book has 750 hymns in it. Three different hymns are sung each service. a) What is the smallest number of cards the

*Math*
139 of CanTexh Supply's employees belong to a union; the remaining 248 employees are not union members. What percent of employees are in the union? (((please help, i have test tomorrow the first thing in the morning!!!:S))) i tried it myself but can u

Chemistry
The pressure inside a hydrogenfilled container was 2.10 at 21 . What would the pressure be if the container was heated to 96?

algebra, help please
(3 x 8)2 + (3+6)=17, I need a word problem to match the equation and am stumped, could you please help

algebra
The hourly wages at a local business are between $8.60 and $14.80 depending upon the job. Write an absolute value inequality describing the possible hourly wages of the employees. Okay, so i already know that the inequality is like 8.60 is < or = to x is <

5th grade fractions
How do I find a number that when divided by 2/3 gives me a quotient between 1/3 and 3/4

MathMs. Sue
Ms. Sue could you please show me how slove this equation. Could you show me how to solve it like this: for ex.: x15 = 8 +15 +15 x = 7 I need help with this equation: 10=W32+6

eng
true or false act 1 1 Macbeth has just defended Kingduncan in a war. 2 the title,the thane of Cawdor, was given to Macbeth 3 Banquo notices Macbethsuneasy reaction to the witches' prophecies

algebra
Solve: 7y10y>10

calculus
Consider the solid obtained by rotating the region bounded by the given curves about the xaxis. y=6x^5, y=6x, x>or equal to 0 Find the volume V of this solid.

ethics
I need help getting started on this question: In the healthcare field, different groups of healthcare professionals adhere to their own codes of ethics. Using any resources available to you, research two different codes of ethics for any two groups of

Physics
i need help sovling for these variables(i know that i am supposed to solve usign opposite operartion but i keep getign most of them wrong. A= 1/2 (a+b)h find a A= 1/2 (a+b)h find h T= squareroot I find I V= 4/3pier^2 find r

calculus
consider the area enclosed between the curves f(x)=x^2 and g(x)=4x what is the volume obtained by revolving the area between these two curves around the line y=20 ? please help, i don't know what to do

Phyisics
i need help sovling for these variables(i know that i am supposed to solve usign opposite operartion but i keep getign most of them wrong. A= 1/2 (a+b)h find a A= 1/2 (a+b)h find h T= squareroot I find I V= 4/3pier^2 find r

physics
i need help sovling for these variables(i know that i am supposed to solve usign opposite operartion but i keep getign most of them wrong. A= 1/2 (a+b)h find a A= 1/2 (a+b)h find h T= squareroot I find I V= 4/3pier^2 find r

physics
a 0.85 kg block of aluminum is heated at atmospheric pressure so that its temperature increases from 22degC to 40degC. find the work done on the aluminum? find the energy added to it by heat? find the change in its internal energy?

Physics
A 6.0 kh block, sliding to the east across a horizontal, frictionless surface with a momentum of 30 kg*m/s^, strikes an obstacle. The obstacle exerts an impluse of 10 N*s to the west on the book. The speed of the block after the collision is...

*Math*
The price of the common shares of SouthCo was valued at $39.45 at the end of 2009, increased by 8.06% in 2010, and overall increased by 12.60% over the two year period 2009/2010. What was the original price of each share at the beginning of 2009? ANSWER:

Physics
the temperature at the surface of the sun is approximatly at 5700K and the temperature at the surface of the earth is approxiamtly 290 K. what entropy change occurs when 1100 J of energy is transfered by radiation from the sun to the earth?

the latin bases
Which word is a synonym of verbiage? A} terse B} wordiness C} curt D} concise .I choose c. is my answer correct?

10th grade
how to simplify radicals

childcare
the introduction of semisolid foods to a fivemountholdinfant may se delay if A the infant has bottle mouth syndrome. B family members have a history of allergies. C the infant consistently prefer a bottle. D the infant is teething. The answer correct is

algebra
(3x^2y^4)(4xy^2) in simplist form please help

spanish
Complete each of the following sentences by writing the appropriate preterit or imperfect form of the indicated verb. BELOW THESE 43 QUESTIONS ARE MY ATTEMPT AT THE CORREECT ANSWERS. I JUST NEED THESE CORRECTED. PLEASE MARK ANY THAT ARE WRONG AND PROVIDE

help plz
Which of the following is an acronym? A} MADD B} FCC C} NBA D} EKG .the answer i choose is b. Am i correct?

3rd Grade Math
Marlon has 4 baseball cards, Jake has 4 baseball cards, and Sam has 3 baseball cards. Can you write a multiplication sentence to find how many baseball cards they have altogether? Explain.

Precalculus
State the domain of f(x) = x / x^2+4x+1

History
How did the economical compostion during coperate greed in the 1980s and how it affected the political climate during this time. Is this asking for me to put in how Reagan gave to the rich and not the poor?

Critical thinking
Can a true conclusion be derived validly from false premises?

Chemistry
Does anyone know how to do this problem, i can't seem to solve it. If 39.25 g of a substance is dissolved in 155.5 g of benzene solvent, the freezing point of the solution is 0.08 oC. Calculate the apparent molar mass (g/mol) of substance.

calculus, volume , application of integration
show steps for the following: Consider the curve f(x)=x^4 between x = 1 and x = 4. a)What is the volume obtained by revolving the area under the curve around the xaxis? b)What is the volume obtained by revolving the area under the curve (i.e. between

geometry
the perimeter of a hexagon is 13.5 what is the lenth of each side

Physics
While riding a chairlift, a 55 kg skier is raised a vertical distance of 370 m. what is the total change in the skier's gravitional potential energy? given: m = 55 kg d = 370 m When i used PE = mgh, the answer was 199,430, i know its wrong since the answer

chemistry
which pair of substances are most likely to obey Raoult's Law? C5H12 and C6H14 H3PO4 and H20 C4H9COOH and C5H12 C5H12 and H20 C4H9COOH and H20 How do I go about figuring this out? What should I be comparing, differences in molar masses, polarity, etc...?

science
a man is driving across a bridge with lots of cargo in the back of the truck but then the truck stops what should he do

Algebra 2
write a equation for each parabola. vertex(0,1),focus(0,5)

algebra
1/2 divided by 2 and 1/4 in lowest terms

chemistry
If 1030 g of a potassium citrate is dissolved in 2320 g of water solvent, calculate the freezing temperature (if below 0 oC, include the sign) of the solution. Consider if the solute is an electrolyte. Kf (oC/m) 1.858

chemistry
Consider a glass of 294 mL of water at 29°C. Calculate the mass of ice at 15°C that must be added to cool the water to 10°C after thermal equilibrium is achieved

Math
can someone show me a step by step guide converting this please 2.483 X 10^7 pm^4kg/s^2 to dam^3mg/day^2

Chemistry
What volume ( L ) of the solute HCO2H should be combined with 5480 mL of the solvent H2O to make a solution that is 0.443 m HCO2H.

Math
Can someone help me convert this 0.908 aL/Tmin to nL/hs

physics
f a pronghorn antelope accelerates from rest in a straight line with a constant acceleration of 1.5 m/s2 , how long does it take for the antelope to reach a speed of 20 m/s?

science
what is the biggest animal alive today

Physics
As part of a forensic test, a 5.0g lead bullet is fired into a fence post. the initial speed of the bullet is 250 m/s. when it comes to res, it is determined that half its kinetic energy had gone into heating the bullet. how much does the bullet's

PHYSICS!!!
Hooke's law describes a certain light spring of unstressed length 36.0 cm. When one end is attached to the top of a door frame and a 6.40 kg object is hung from the other end, the length of the spring is 44.00 cm. (a) Find its spring constant I found the

physics
An airplane pilot wishes to fly due west. A wind of 82.0m/s is blowing toward the south.If the airspeed of the plane (its speed in still air) is 375.0 km/h, in which direction should the pilot head? What is the speed of the plane over the ground?

physics
f a pronghorn antelope accelerates from rest in a straight line with a constant acceleration of 1.5 m/s2 , how long does it take for the antelope to reach a speed of 20 m/s?

mathplz help
Consider the curve f(x)=x^4 between x = 1 and x = 4. a)What is the volume obtained by revolving the area under the curve around the xaxis? b)What is the volume obtained by revolving the area under the curve (i.e. between f(x) and the xaxis) around the

math
0.75 in fractional notation is equal to what? is it 70/100

math
write this equation in standard form. y=1/2x2+12x8 y equals one half x squared plus 12x minus 8

Science
What are some examples of speed and velocity? I'm trying to illustrate them for a project, but i don't know what to draw

economics
1. Ned reads textbooks (y) and harlequin romance novels (x). He sends about $250 per quarter on books. His demand for textbooks can be written m 2py and his demand for harlequin romance novels is m 2px . (a) Textbooks cost $30 while romance novels cost

math
write the ratio as a fraction in lowest terms. compare in hrs. 50 hours to 3 days. is it 50/12

math
consider the area enclosed between the curves f (x) = x2 and g (x) = 4x what is the volume obtained by revolving the area between these two curves around the line y = 20?

College Physics
A rock is dropped from a sea cliff and the sound of it striking the ocean is heard 6.4 s later. If the speed of sound is 340 m/s, how high is the cliff?

math
36/50 is what percent? is it 0.72%

Math
Gilda ran a 26mile marathon. About how far would her sister have to swim to use the same number of Calories Gilda used during the marathon?

plz give me da question
Suppose you have to establish a new company. Suggest in which item or items company should deal. How much sale of the item is required in order to reach at break even point depending on the suggested price of item, production capacity, fixed and variable

chem
how many milliter of .246 M HNO3 should be added to 213 ml of 0.00666 M 2,2'bipyridine to give a pH of 4.19? please help, does this problem need to be solved with ka or kb?. Is 2,2' bipyridine a base, this is the problem from my text book, but it is not

us history
What year did Wyoming establish it's public school system?

chemistry
why does the enthalpy of formation for the ethanol dimer have more energy than two isolated ethanol molecules? is it because there is a bond between the hydrogen of ethanol dimer

math
write the ratio as a fraction in lowest terms. compare in hours. 50 hours to 3 days I think the ratio is 16:7

Geography
How old is the grand union canal?

Math
The length of a median of a triangle is 36 units. Describe the location of the centroid on that median.

Help (URGENT)
If this is a graph from 1996, someone listed in the 3034 age group would be in which age group in 2016? (hint: each age group goes up by five years) GRAPH: 3034 3539 4044 4549 5054 5559 6064 6569 7074 7579 8084 85+ Can someone pleaseh help me?

math
i posted this can you explain to me how to do this question i know i have to use differential equations but im not sure how to form an equation for inversely proportional question states grain is being poured at a steady rate to form a pile with height h,

history
I'm trying to research desecreation and Jim Crow Laws. Does anyone know any good sites??? thanks aShLeY

Physics
A brick is thrown vertically upward with an initial speed of 4.40 m/s from the roof of a building. If the building is 74.0 m tall, how much time passes before the brick lands on the ground?

Physics
How long does it take for a golf ball to fall from rest for a distance of 11.2 m? How far would the ball fall in twice that time?

math1
I have no clue how to do this. I have to write it out than solve. Nineteen less than nine times a number is equal to 11 more than seven times the number. i know so far is 99*n=11+7?

grammar
We are proof reading phrases for errors. aunt rose, one of my favorite aunts This is my corrected phrase: Aunt Rose, one of my favorite aunts

Algebra 1
How do you graph y=1/2x+1 y=3x+8

music
y is selamat pengantin baru commonly used in malay weddings? i searched in the net but the sites did not relate to the questions about my homework...help plz...due tomorrow

Math
This is logic involving truth tables. How can i prove C¡úD B¡ÅC A¡Ä¡×B  ¡àDy problem i cant get in the whole packet This is the onl

Physics
A brick is thrown vertically upward with an initial speed of 4.40 m/s from the roof of a building. If the building is 74.0 m tall, how much time passes before the brick lands on the ground? I don't get how to solve it still

Math
This is logic involving truth tables. How can i prove C¡úD B¡ÅC A¡Ä¡×B  ¡àD

MARDI GRA.
Okay, im doing a project on Mardi gras and i neeed a catcby title w/o telling the subject of the project. kinda like a riddle?

Science
What sequence of events could lead to magma becoming soil?

algebra
y^22y+1=36 give exact and approximate solutions to three deceminal places

algebra
x^222x=10 solve by completing the square

algebra
x^2+14x+4=0 solve for x

Business
What resources does an International Internet retailer need other than merely a storefront on the Internet?

algebra
r^2+3r=5 solve for r

Enginnering University
why we use the circular sewage lids instead of anothe shape?give me some mathematical explanation.

math
a road crew has 3/4 ton of stone to divide evenly among four sidewalks. How much stone does the crew use for each sidewalk?

Biology
Why does the blood pressure goes up and down all the time.

science
what drives the lithospheric plates

writing
Answer the following questions in a 100 to 200word response. Address each bullet point in your answer. o In the future, how will thinking critically influence the ways that you · Read? · Write? · Process information? · Answer the following questions

Math
I'm reviewing algebra and I need help with this equation. I'm a quick learner so an example could be fine. Thank you in advance. h(8) = 3

Biology
Why the right atrium is larger than the left atrium.

math please help
i posted this can you explain to me how to do this question i know i have to use differential equations but im not sure how to form an equation for inversely proportional question states grain is being poured at a steady rate to form a pile with height h,

Biology
Why the left ventricle has a thicker more muscular wall than the right ventricle.

Biology
Why arteries have more muscle in their walls than veins

riddle
could anyone please solve this riddle : I am what you cannot be but you once were what i will become i am what only blind can see and of infinity and 1 i am the sum i am the cure and i am the cancer?

Math
A woman driving a care 14ft long is passing a truck 30 ft long. The truck is traveling at 50 miles per hour. How fast must the woman drive her car so that she can pass the truck completely in 6 seconds?

Physics
Find the slope of the line that is tangent to the given function’s graph for the specified value of the independent variable. f(x) = 9x – 8; x=10.

algebra
x+2y=y8 how do i solve that???

Geometry
IF m

Physics
Find the slope of the line that is tangent to the given function’s graph for the specified value of the independent variable. f(x) = 9x – 8; x=10.

Physics
Compute the derivative of the given function and find the slope of the line that is tangent to its graph for the specified value f the independent variable. f(x) = 9x^2 – 2x + 8; x =3.

Math
Did I do this right? Just want to make sure. 15 = r1 + 6 +6 r = 21

Math
Find the Derivative of: F(x)= (x^2) (e^x) + (e^x) would I use the product rule? F'(x)= 2x(e^x) + (e^x) (x^2) + (e^x) = (e^x) ( x^2 + 2x + 1 )

business
How and why would a manager would want to choose and recommend business alternatives using financial statement analysis?

Math
Find the Limit Lim x5/ (1/x)(1/5) x>5 can I assume that 1/x is going to infinity so (1/x) is zero? so then I will be left with: 55/ (1/5) 0/ (1/5) =limit is 0?

12th grade
I have to write a evaluation on president Obamas speech on 1/27/10. THis speech is for Public speaking class. THis is what i have done. I will critically evaluate every aspect of the speech that the President made especially his Delivery, Audience,

Math
Can you please check to see if this is correct: 5 = x(17) After doing my work I got x = 22

Math
why do fractions need a common denominator before you can add or subtact them?

Language Arts
What's a good way to teach the word "Accolade" to the class. I have to make a prsentation that's less than 2 minutes, and teach my classmates the word so that it sticks. Any help???

Math
What Are The Stepd In Finding The Volume Of An Rectangular Prism?

englsih
i need this paragraph edited Secondly, the previous action in the play shows conflict of interest between the younger daughter and her older father. For example, during a conversation between the father and the daughter, there is clear proof of Japanese

English
Can you check the following paragraphs for me? Thanks a lot 1) I spent the first days of my Christmas holidays doing homework and studying 2) During the first weekend of my holidays I went to the seaside with my parents. The weather was nine and we enjoyed

social studies
the compromise of 1850 how did this event impact american history(why was it important to oour country,what were the benefits or drawbacks of the event for the u.s.

physics
A 4 kg wooden block rest on a table. the coefficient of friction between the block and the table is .40. a 5kg mass is attached to the block by a horizontal string passed over a frictionless pulley of neglible mass what is the acceleration of the block

physics
A woman does 340 J of work to move a table 4 m across the floor. What is the magnitude of the force that the woman applied to the table if this force is applied in the horizontal direction?

cumputers
Why would I use a gateway over a router?

physics
A woman does 340 J of work to move a table 4 m across the floor. What is the magnitude of the force that the woman applied to the table if this force is applied in the horizontal direction?

math
How many people do you need in a room in order to guarantee that there is a pair of people who were born in the same month? Choose one of the following answers: 12 13 365 366

10th grade
I have to right an iambic pentameter poem on a pilgrim such as a plumber or a goat farmer. I've been working on it for days but just came to the assumption that I CAN'T RIGHT POEMS. I've tried using quotes from Dantes inferno and rewording them but it

Math
Can you please explain how to do this equation, thanks x+9+12 = 3

math
Why exactally does the absolute value of 3+4i = 5. I know (3) squared plus (4i) squared = 5? Could you include a graphic approach as well? Thank you.

math
Bryna contributes 7% of her salary to a payroll savings plan. if her annual salary is $17,500, how much is withheld each month for savings?

math
what is congruent?

science
how did organic compounds get this name?

geography
why is judaism mulitethnic

health admn
Health care is evolving and facing increasing challenges related to reimbursement, staff shortages, patient safety, increasing costs, and increasing regulatory requirements. As a health care leader, which leadership skills do you find most valuable when

math
Solve the inequality and show the number line. x + 29 < 33 for x > 0

Childcare
why is the incubation stage of an illness of concern to day care workers? A children in the stage require a great deal of care and special attention. B children in this stage often need special medical help C children in this stage often pass on the

accounting
During the latest accounting period, the company experienced a net loss of $800,000 yet its cash increased $300,000 during the same period. What are some of the reasoning for this?

consumer math
Paula budgets 23% of her annual income for housing. If she budgets $410 per month for housing, what is her annual income?

Math
If the measure of angle 1 = 4x + 10 and the measure of angle 7 = 6x + 4. what are the measures of angle 1 and what is the measure of angle 7?

algebra
9 over y + 2 over 5 + 3 over 5y

math
what is the diameter of a circle that has an area of 36 square inches

Trig
How would you find tan80 and tan55 as needed in this problem? Use identities to find each exact value. (tan80+tan55)/(1tan80tan55)

math
using the scale 1 inch= 8 feet. what is the legnth of 16.5 feet?

Math
If this is a graph from 1996, someone listed in the 3034 age group would be in which age group in 2016? (hint: each age group goes up by five years) GRAPH: 3034 3539 4044 4549 5054 5559 6064 6569 7074 7579 8084 85+ Can someone pleaseh help me?

computers
Saguaro Federal has mainframes for all of its banks and businesses must the company use the Ethernet or Token Ring protocol? Explain your choice why is this choice appropriate?

Finances
what are the differences between a comptroller and a treasurer?

math
Laurie expects to make $100,000 in 2007. Her social security tax is 6.20% up to the wage base, Medicare is 1.45%. How much FICA is Laurie expected to pay for the year?

Science
For science I have to create a safety poster about one safety rule. Are these ones good: *clean up after your mess. *Don't eat or drink in the science lab. *Wash your hands after experiments. *Never reach across a flame. *Listen to directions. More rules

Math
You can buy an energysaving light bulb for $18.07, which can work for 10,000 hours. It costs you 0.8 cents to operate it for an hour. ($1=100 cents). A regular light bulb with the same intensity costs 39 cents. The light bulb can work for 1000 hours. It

7th grade
what percent of decrease is from 125 to 75

physics
A spring with a spring constant k of 44 N/m is stretched a distance of 30 cm (0.3 m) from its original unstretched position. What is the increase in potential energy of the spring?

COMPUTERS
10 LINES ON THE VARIOUS USES FOR COMPUTERS

Chemistry
how do i find which substances are most likely to obey raoult's law?

geography
can you give me examples of countries in stage 2(early expanding) and 3(late expanding) in the demographic transition cycle ???? thank you rachel

childcare
thank you Ms.Sue by this information. Then my answer should be C.

Algebra
The hourly wages at a local business are between $8.60 and $14.80 depending upon the job. Write an absolute value inequality describing the possible hourly wages of the employees. Okay, so i already know that the inequality is like 8.60 is < or = to x is <

fine art
I have a writing assignment to do I need some reference points. "Art is a window into culture"

Astrophysics
(a) From the absorption lines, we were able to determine that the star (phi)Fictus has spectral classification F7V and color index BV=0/48. What is the mass M(phi) of the star in solar masses? (b) Spectroscopic parallax, when corrected for reddening,

Math
(1.19)3 + X .49= 4.55 This is the last problem on my assignment. I tried but my teacher told me I got it wrong, help please?

business
How do I describe why I think that a specific for of organization is best for a topic sentence?

Physics
Friction provides the force needed for a car to travel around a flat, circular race track. What is the maximum speed at which a car can safely travel if the radius of the track is 77.0 m and the coefficient of friction is 0.36?

HSM 220
Does anyone help with this subject?

probability
A total of n balls are to be put into k boxes with conditions that there will be n1 balls in box 1 ,n2 balls in box2 and so on. With nkballs being placed in box k(n1+…..+nk = n)Explain why the number of ways of doing this is n!/n1!*….*nk!. Explain why

math
x=16 to the second power+63T4+4 after lounch how many seconds will it take to hit the ground