Questions Asked on
September 30, 2013

Science Safety
Is there a website which gives safety rules for a study session outside a laboratory, mainly outdoors? It should be for students and I would also like a website/section which tells about how to prepare for an accident and what to do if there is one. Thank
asked by Anonymous 
physics
3. A box is given an initial speed of 3.0 m/s up an incline where the angle θ =22o. Use the diagram below to define the xy axes. Assume the original position is on the ground (xo and yo = 0). Ignore friction. a. How far up the plane (in meters) will the
asked by sam 
MircoEcon
Agree or disagree with this statements and explain: If the demand for a good has unitary elasticity, or elasticity is 1, it is always true that an increase in its price will lead to more revenues for sellers taken as a whole.
asked by Jeff 
math
i need help to solve this 0.3(0.3x+0.8
asked by vanessa 
Beginners Spanish
I need to form a question out of this response. I wanted to know if it was correct. Response:Hay mucha tarea hoy. Question I formed:¿Cuánta tarea hay hoy?
asked by Devyn 
Math  Advanced Functions
the function f(x)=0.005x^2+0.8x+12 models the relationship between a certain vehicle's speed and a fuel economy, where f(x) is the fuel economy in kilometres per litre and x is the speed of the vehicle in kilometres per hour. Determine the rate of change
asked by Sydney 
math
the formula T=1/f relates the period of a sound wave T to its frequency f. solve this formula for f.
asked by shoua 
math
DVD cases are 9/16" wide. If Juan has 60 DVDs, how many will fit on a 2 1/2 feet long shelf?
asked by Ariana 
physics
football is kicked off with an initial speed of 66 ft/s at a projection angle of 45 degrees. A receiver on the goal line 63 yd away in the direction of the kick starts running to meet the ball at that instant. What must be his minimum speed (in
asked by lucas 
math
5th grade math parent. This will sound dumb but.... 5/7 1/2 and 3/14. The sum is 1 3/7 correct? The question reads MArshall surveyed his classmates and found 5/7 have a sister, 1/2 have a brother, and 3/14 do not have siblings. The question is: Why does it
asked by Sara 
math
5th grade math parent. This will sound dumb but.... 5/7 1/2 and 3/14. The sum is 1 3/7 correct? The question reads MArshall surveyed his classmates and found 5/7 have a sister, 1/2 have a brother, and 3/14 do not have siblings. The question is: Why does it
asked by Sara 
Chem
If you take a 15.0mL portion of the stock solution and dilute it to a total volume of 0.700L , what will be the concentration of the final solution?
asked by meaghan 
PreCalculus
A local photocopying store advertises as follows. " We charge 14 cents per copy for 150 copies or less,6 cents per copy for each copy over 150 but less than 230, and 3 cents per copy for each copy 230 and above. " Let x be the number of copies ordered and
asked by Ann 
math
Thank you Jai!
asked by Sara 
proposal writing for high school english
how to write a proposal in brief for a 10 marks question? What structure should be followed for just 10 marks?
asked by neha 
Science: physics
Why does the moon not require a push to keep it along its orbit around the earth? I have to use Newton's first law of motion.
asked by Losa 
English
Chiara's show is coming soon. We can't wait to see it. (How do you pronounce "Chiara' in the first sentence?)
asked by rfvv 
Geometry proving quadrilaterals
Proving quadrilaterals PLEASE PLEASE PLEASE HELP *the diagonals of a square bisect the vertex angle * the diagonal of a rhombus are perpendicular *each diagonal of a rhombus bisects the opposite angles of the rhombus help me prove please how ? tell me
asked by Julia 
college math
1/1000001/10000
asked by Tekishia 
MATH
customers loan of 675 the annual interest is 19.25. what is the total dollar amount to be repaid including principle and interest for the entire year?
asked by Anonymous 
maths
find the total amont to be paid if : (i)one rain coat of rs.300,vat@10% (ii)one pair of shoes of rs.460,vat@9% (iii)clothes of rs.800vat@1% are purchased.
asked by shrestha tejaswi 
Math
5th grade parent can you please show me how to break down 4 4/5 does it end up being 24/5? the probleam is: 4/4/5 1 7/8
asked by Sara 
MATH
i am a no. less than 10.my hundredths digit 3 more than my thousands digit.my tenths is 2 less than my hundredths and my ones is the sum of my tenths and my hundredths digit. what number can i be?
asked by kristine Ramos 
maths
Find the roots of the following quadratic equations (if they exist)by the mnethod of completion of the square . (i) x^2(root2+1)+root2=0
asked by help()!!!!! 
maths
Find a formula for the n'th of the sequence : 2,4,8,16,32
asked by arzam 
Probability With Cards
When drawing a card from a deck, the P(king and hearts) is:
asked by Alex 
Card Probability
When drawing a card from a deck, the P(face card and red) is:
asked by Alex 
Dice Probability
What is the probability of rolling two number cubes and having the first cube land on 2 and the second cube land on 3? I got 2/6 * 3/6 = 6/36 which becomes 1/6 1/6 probability is my answer correct?
asked by Alex 
maths
Find the n'th term of the sequence : a) 1/2, 2/3, 3/4, 4/5 b) 5/1^2, 5/2^2, 5/3^2, 5/4^2
asked by arzam 
maths
Find the n'th term of the sequence : a) 1/2, 2/3, 3/4, 4/5 b) 5/1^2, 5/2^2, 5/3^2, 5/4^2 c) 3/1, 4/2, 5/3, 6/4
asked by arzam 
chemistry
You took 0.99ml of a hexokinase assay solution and added 10 ul of an unknown glucose sample. The absorbance at 340nm is 0.422 the extinction coefficient is 6.22x10^3 the molecular mass of glucose is 180.16g/mol. What is the concentration of glucose in the
asked by lacy 
english
Summarize the main points of this reading.Possible points to reflect upon for your reflection paper and for workshop discussion are: 1)Ray has been diagnosed with Tourette’s Disorder, a neurological disorder which also appears in the DSM5. How would you
asked by ios7 
science
What is a possible hypothesis that could be tested in the Atomic Theory lab?
asked by bob 
math
find an advertisement for a weight loss product either online or in the print media, the more unbelievable the claims, the better a. What data does it offer for its promised benefits? Does it offer any descriptive statistics or merely testimonials? if it
asked by ios7 
chemistry
You took 0.99ml of a hexokinase assay solution and added 10 ul of an unknown glucose sample. The absorbance at 340nm is 0.422 the extinction coefficient is 6.22x10^3 the molecular mass of glucose is 180.16g/mol. What is the concentration of glucose in the
asked by lacy 
physical science
calculate the number of moles of H2SO4 wich were added to the NaOH solution
asked by gill 
chemistry
What is molarity? what is the unit to measure moralrity?
asked by Anonymous 
maths
If a line with xintercept −3 and yintercept 21 passes through point P=(8,a) , what is the value of a?
asked by CHRIS 
la sallle
There are 3 consecutive even integers such that the quotient obtained by dividing twice the largest integer by the smallest integer is three less than threefifths of the second integer. What are the integers?
asked by rr 
english
Read “Witty Ticcy Ray” by Oliver Sacks What does Ray mean when he says “Suppose you could take away the tics. What would be left? I consist of ticsthere is nothing else.”?
asked by ios7 
english
Read “Witty Ticcy Ray” by Oliver Sacks How does Oliver Sacks, a neurologist, look beyond his biological/medical paradigm in his treatment of Ray?
asked by ios7 
physics
a body of mass m accelarates uniformly from the rest to velocity v1 in time t,find the expression for instantaneous power deliver to the body as the function of t?.......can any one help me with this......please.....
asked by ether 
maths
If P=(a,a) is a point on the line y=−2x+27, what is the value of a?
asked by CHRIS 
physics
a body of mass m accelarates uniformly from the rest to velocity v1 in time t,find the expression for instantaneous power deliver to the body as the function of t?.......can any one help me with this......please.....
asked by ether 
biology
How does mitosis in plant cells differ from that in animal cells? A. Animal cells lack a cell plate. B. Plant cells lack centrioles. C. Plant cells lack spindle fibers. D. Animal cells lack cytokinesis. I chose b but I got it wrong please help....
asked by nina 
Physics
A bus travels 290 km south along a straight path with an average velocity of 81 km/h to the south. The bus stops for 25 min, then it travels 210 km south with an average velocity of 80 km/h to the south. How Long does it lasts ? Answer in units of h . What
asked by Thomas 
phys223
What is the amplitude of the motion? Remember, at t = 0 a block with mass M = 5 kg moves with a velocity v = 2 m/s at position xo = .33 m from the equilibrium position of the spring. The block is attached to a massless spring of spring constant k = 61.2
asked by eddy 
Economics
Example of one irrational economic decision
asked by Mary 
Math/Science
Wendell invests $10,000 in a stock portfolio made up of Petroleum Special at $30 per share, Newshoe at $12 per share, and Beans and Sprouts at $2.50 per share. He places 60 percent of the money in P.S. (Petroleum Special), 30 percent in N (Newshoe), and 10
asked by Walter 
Science/Math
John and Al are in a 15 km race. John averages 4.4 m/s during the first half of the race and then runs at a speed of 4.2 m/s until the last 200 m, which he covers at 4.5 m/s. At what average speed must Al run to beat John? The textbook that included the
asked by Walter 
Science/Math
A sailboat heads north at 3 m/s for 1 hour and then tracks back to the southeast (at 45 degrees to north) at 2 m/s for 45 minutes. a. How far has the boat sailed? b. How far is it from its starting location? The textbook that included the word problem is:
asked by Walter 
science
1283. Determine the maximum height on the wall to which the firefighter can project water from the hose, if the speed of the water at the nozzle is 48ft/s
asked by aaa 
CHEMISTRY
Given that Mg(ClO3)2 decomposes into magnesium chloride and oxygen: A) Write a balanced equation for this reaction. I got Mg(ClO3)2 yields MgCl2 + 3 O2 Is that right? B) If 0.302 grams of O2 is lost from 1.890 grams of a mixture of Mg(ClO3)2 and an inert
asked by Allie 
CHEMISTRY
Given that Mg(ClO3)2 decomposes into magnesium chloride and oxygen: A) Write a balanced equation for this reaction. I got Mg(ClO3)2 yields MgCl2 + 3 O2 Is that right? B) If 0.302 grams of O2 is lost from 1.890 grams of a mixture of Mg(ClO3)2 and an inert
asked by Allie 
intermediate algebra
A local electronics store will sell seven AC adapters and two rechargeable flashlights for $86, or three AC adapters and four rechargeable flashlights for $84. What is the price of a single AC adapter and a single rechargeable flashlight?
asked by amanda 
English
Check my answers please 9. The author of "My Brother's Keeper" mainly develops Jamie’s character through his actions *dialogue and thoughts the narrators description other’s reaction to him 10. In "My Brother's Keeper," what does Ted want Jamie to do
asked by Anonymous 
Economics
Give at least one example of a form of advertising that influences consumer behavior — that is, advertising that persuades people to buy a good or service that otherwise would not have purchased.
asked by Mary 
pre algebra
Use the compound interest formula to find the value of the investment after 5 years, compounded semiannually. $1,000 at 6% annual interest
asked by india 
chemistry
What is the major difference between the twodimensional and three dimensional models of ethane and methane? When might you choose to use a twodimensional model rather than a threedimensional model when representing one of the molecules?
asked by Jessica 
English
What are some flaws that people had against equal rights?
asked by vickie 
Media
Can you help me reword these media paragraphs to an A* standard please?
asked by Jasmine 
Economics
Give at least one example of a news story that has influenced consumers desires or affected consumer behavior. Describe the effect it had on your consumer behavior.
asked by Mary 
algegra
Solve the following inequality. 4x4/x+3≤3
asked by Miriam 
Physics
A loudspeaker of mass 20.0kg is suspended a distance of h = 1.60m below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 4.00m .
asked by Anonymous 
Economics
is Nine co by nine west a name brand store?
asked by Mary 
Statistics
Ricardo's car rental offers five different types of vehicles, compact cars (CC), midsize cars (MC), sport utility vehicles (SUV), vans (V), and luxury cars (L). Historically, if a random individual comes to rent a vehicle, the following probabilities
asked by Jesse 
phusics
At the end of most landing runways in airports, an extension of the runway is constructed using a special substance called formcrete. Formcrete can support the weight of cars, but crumbles under the weight of airplanes to slow them down if they run off the
asked by joe 
Algebra
Multiply: 8(2a+4b6)
asked by Laurie 
Math
Point A ( 6, 2) is reflected over the X axis.Write the coordinates of A'.
asked by Steve 
Math
How many lines of symmetry does a right triangle have?
asked by Steve 
Physics
A bag of sugar weighs 6.70 lb on Earth. a) What would it weigh in newtons on the Moon, where the freefall acceleration is one sixth that on Earth?
asked by Kelsey 
Water treatment
The capacity of the groundwater treatment plant has recently been expanded to receive an additional 50,000 m3/year. As a result, all of the 6 rapid sand filtration are being operated. Assume a peak flow factor of 1.5. If the filtration rate is 5 m/h, what
asked by WT 
Water treatment
If the RQ is 6 and the k2t is 4, what is the removal efficiency of (CO2) of the cocurrent tower aerator. What will be the efficiency if a tower aeration with counter current flow is used instead? what is the efficiency of the cocurrent tower aerator (%):
asked by WT 
Chemistry
The initial concentration for the compounds involved in the reaction displayed were determined to be [PCl5(g)] = 0.4107 mol/L, [PCl3(g)] = 0.3463 mol/L, [Cl2(g)] = 0.04085 mol/L. Calculate the value of the equilibrium constant (Kc) at 191.0 °C if the
asked by marmar 
Finance/571
Trigen Corp. management will invest cash flows of $1,206,765, $1,085,603, $602,301, $818,400, $1,239,644, and $1,617,848 in research and development over the next six years. If the appropriate interest rate is 9.14 percent, what is the future value of
asked by Anonymous 
math
The GCF of two numbers is 850. Neither number is divisible by the other. What are the least two numbers these could be.
asked by sam 
math
What is mental math?
asked by mateo 
Math
maria works 8 hr shifts.she has earned 62.75 mins of sick time. how many sick days does she have
asked by Gina 
Math
maria works 8 hr shifts.she has earned 62.75 mins of sick time. how many sick days does she have
asked by Gina 
MATH
YANCEY COLLECTS PLASTIC BANKS. HE HAS THREE DIFFERENT BANKS;A PIG,A COW, AND A HORSE. HOW MANY WAYS CAN YANCEY ARRANGE HIS BANKS ON A SHELF
asked by JUDY 
Chemistry
Phosphorus pentachloride decomposes according to the chemical equation PCl5(g) > PCl3 (g)+ Cl2(g) Kc= 1.80 at 250 degrees C A 0.206 mol sample of PCl5(g) is injected into an empty 3.30 L reaction vessel held at 250 °C. Calculate the concentrations of
asked by Katherine 
Dma 040
v =1/3ah, solve for h
asked by Bridget 
math
The LCM of two numbers is 51. Both numbers are greater than 1 and both numbers are prime. What are the two numbers?
asked by sam 
AP Chemistry
What would be the final temperature of the system if 20 g of lead at 100◦C are dropped into 20 g of water at 30 ◦C in an insulated container?
asked by Anonymous 
interest
Matty Kaminsky owns a new Volvo. His June monthly interest was $400. The rate is 8 1/2 percent. Matty's principal balance at the beginning of June, rounded to the nearest cent, is: (Use 360 days)
asked by Anonymous 
chemistry
A mixture of NaCl and NaBr has a mass of 2.04g and is found to contain 0.70g of Na. What is the mass of NaBr in the mixture?
asked by Anonymous 
earth
Inclusion occurs when?
asked by sasa 
Spanish
I don't get what word to choose: Estudias mucho, ¿ (blank)? Do I fill it in with verdad or gusto? Why?
asked by Anna 
language
What word does the italicized adverb in the sentence modify? The dog COMPLETELY swallowed the small milk bone. a) dog b) swallowed c) small d) milkbone
asked by victoria 
Geometry
The Seattle space needle is 604 feet tall. a model of the building is 48 inches tall. what is the ratio of the height of the model to the height of the actual space needle? A. 151:1 B 151:12 c.1:151 D.12:151
asked by gabbi 
language
Which strategy helps you identify the adverb in the sentence ? The race was completed quickly. a) where? b) when? c) how? d) to what extent?
asked by victoria 
Algebra 1
To answer the following questions, my assigned textbook provides a chart of the required information which displays 5 individual sections of the amounts of the different types of DVD rentals. Comedy is 320 rental; action is 200 rentals; drama is 160
asked by Anonymous 
language
What type of context clue is provided for the italicized word in the sentence below? when you are PRONE to something, you are likely to act or be a certain way. a) direct definition b) visual clue c) explanatory word or phrase d) antonym
asked by victoria 
Algebra 1
What percent of 40 is 25?
asked by Anonymous 
Mathematics
800 * 0.25 = ?
asked by Anonymous 
Math
If 19 is subtract from three times a certain number,the difference is 11.what is the number?
asked by Kirandeep 
Math
Jane is thinking of a number C with the property 3(2+c)=12.what number is jane thinking about?
asked by Kirandeep 
chemistry
it says "how many joules of energy would be required to heat 29.8 grams of carbon from 25.5 C to 79.3 C. (s= .71 Joules / grams times carbon) & the formula is Q= M x C x delta T .
asked by David 
chemistry
it says "how many joules of energy would be required to heat 29.8 grams of carbon from 25.5 C to 79.3 C. (s= .71 Joules / grams times carbon) & the formula is Q= M x C x delta T .
asked by David 
English
What is dinosaur in the sentence? What happened to the dinosaurs?
asked by Kelley 
Algebra
What expression is equivalent to 5(p + q)?
asked by Anonymous 
chemistry
it says "how many joules of energy would be required to heat 29.8 grams of carbon from 25.5 C to 79.3 C. (s= .71 Joules / grams times carbon) & the formula is Q= M x C x delta T .
asked by David 
English
What is mammals in this sentence? However, no blockbuster movie features small mammals! Direct object?
asked by Kelley 
language
which of the following is not a type of folktale? a) cautionary tale b) mystery c) legend d) myth
asked by victoria 
language arts
Some friends from my class went to museums ballet exhibit. which of the following is an adjectival phrase? a) went to the museum ballet exhibit b) the museums ballet exhibit c) from my dance class d) some friends
asked by victoria 
news/english
still struggling with impact/significance An estranged daughter and her husband start a family shoot out at her parents’ mobile home in rural Pennsylvania leaving everyone except the woman’s father dead. John Frew allegedly shot and killed attackers
asked by Blaze 
Mathematics
12 * 1.25 = ?
asked by Anonymous 
physics
A 2.1 multiplied by 103kg car starts from rest at the top of a 5.8mlong driveway that is inclined at 22° with the horizontal. If an average friction force of 4.0 multiplied by 103 N impedes the motion, find the speed of the car at the bottom of the
asked by Anonymous 
French
Souligne l'adjectif dans la premiere phrase, puis complete la deuxieme phrase avec l'adverbe qui correspond. Exemple: Le dectective Lee est logique. Il a travaille. 1. La dectective Lee est logique. Il a travaille______. 2. La detective Jura est serieuse.
asked by Peter Griffin 
Geometry
Sarah is making a scale drawing of a painting that is 48 in. wide by 120 in tall. her paper is 12 in. wide and 24 in. tall. She decides to use the scale 1 in. = 4in. is this a reasonable scale?
asked by gabbi 
Math
Mr.jones bought a share of a stock at the cost of x dollars. This year his stock is 17 dollars,which is five more than triple the original price.how much did mr.jones pay for the stock originally?
asked by Kirandeep 
Physics
A small turboprop commuter airplane, starting from rest on a Gander airport runway, accelerates for 19.5 s before taking off. Its speed at takeoff is 53.6 m/s (120 mi/hr). Calculate the acceleration of the plane, in g's, assuming it remains constant.
asked by CONFUSED PHYSICS STUDENT 
Physics
While exploring the canopy of the rainforest in equatorial South America, Anastasia falls from a branch 43.0 meters high. Exactly 1.6 seconds later Joe falls from the same branch. How high above the ground is Joe when Anastasia splats into the mud below?
asked by Carlos 
English
What is mystery in this sentence? The disappearance of the colony is a great mystery. Is it a predicate noun
asked by Kelley 
Last news/english proofread
A New Jersey Chemist convicted of poisoning her husband to keep him from divorcing her was sentenced to life in prison today. Titanle Li used thallium to poison her husband Xiaoye Wang in 2010. Thallium is a tasteless, highly deadly poison that is
asked by Blaze 
Algebra 1
What percent of 45 is 6.75?
asked by Anonymous 
physics
when maggie applies the brakes of her car, the car slows uniformly from14.3 m/s to 0 m/s in 2.18 s. How far ahead of the stop sign must she apply her brakes in order to stop at the sign? answer in m
asked by katy 
physics
when maggie applies the brakes of her car, the car slows uniformly from14.3 m/s to 0 m/s in 2.18 s. How far ahead of the stop sign must she apply her brakes in order to stop at the sign? answer in m
asked by katy 
math
There are 30 books in a bookcase. The books in the case are either math, science ,or history books. Ten of the books are math books. There are 6 fewer science books than history books. How many science books are in the bookcase??????
asked by kilah 
Math
There are X number of people living in a house.three less than four Times the number of people is forty one.how many people lives in the house?
asked by Kirandeep 
math
A TOY STORE IS ORDERING 3,000 REMOTE CONTROL CARS.THE STORE CAN ORDER THE CARS IN SETS OF 10.HOW MANY SETS OF 10 DOES THE STORE NEED TO ORDER?
asked by VR 
physics
You are pushing a refrigerator across the floor of your kitchen. You exert a horizontal force of 294 N for 7.6 s, during which time the refrigerator moves a distance of 3.2 m at constant velocity. (a) What is the total work (by all forces) done on the
asked by sandy 
biology
explain how a pyramid can be used to show the relationship among the organisms in the food web.
asked by loli 
physics
A driver in a car traveling at a speed of 70 km/h sees a cat 129 m away on the road. How long will it take for the car to accelerate uniformly to a stop in exactly 125 m? answer in units of s
asked by alex 
physics
A driver in a car traveling at a speed of 70 km/h sees a cat 129 m away on the road. How long will it take for the car to accelerate uniformly to a stop in exactly 125 m? answer in units of s
asked by alex 
American History
The failures of the Articles of Confederation showed that A.) The new government had to be powerful. B.)State government had to be allpowerful. C.)The people should not grant powers to the government . D.)The government should not guarantee individual
asked by Gayle 
math
a toy car store is ordering 3,000 remote control cars.the store can order the cars in sets of 10.how many sets of 10 does the store need to order? a.30 b.300 c.3,000 d.30,000 a.what information do you need to use? b.what do you need to find? c.how can
asked by VR 
Language Arts
3 main points for a speech on the alphabet
asked by Natalie 
Geometry
Use the Division Property of Equality to complete the following statement. If 5x=2y, then x=? Mom in need of help
asked by Kandy 
Calculus
Can some one please explain this problem to me? Find lim x>0 (sin5x/sin7x)
asked by Cat 
physics
A superhero ﬂies 285 m from the top of a tall building at an angle of 15 ◦ below the horizontal. What is the horizontal component of the superhero’s displacement? Draw the vectors to scale on a graph to determine the answer. Answer in units of m Your
asked by emily 
Algebra
I do not understand this word problem at all. write an equation and solve. A rectangle has a length of x+6 units and a width of x3 units. what is the perimeter in terms of x?
asked by Anonymous 
chemistry
What mass of silver chloride can be produced from 1.36L of a 0.130M solution of silver nitrate?
asked by samantha 
math
the temperture was 80 degrees F at noon on tuesday the temperture changed 2 degrees F per hour from noon on tuesday until 10:00 am the next morning what is the new tempeture
asked by keke 
Physics
As a train approaches the city it sees a stalled car on the tracks. The train slams on its brakes going from 25 m/s to rest in 30 s. How far away was the stalled car when the train conductor slammed on the brakes?
asked by Vanessa 
social studies
which of the following would be categorized as the cultural element of dance? a) etouffee b) faisdodo c) zydeco d) gospel
asked by victoria 
social studies
which characteristics of geography is reflected in the similarities between the Acadians of Nova Scotia and the Cajuns of Louisiana? a) movement b) location c) place d) adaption
asked by victoria 
Science
Why can't companies make standard measured products to sell within the USA and make metric measured products to sell outside the United States?
asked by Libby 
Language arts help please
1. Identify the adjectives in the followig sentence. You can choose more than one answer. After a rainfall, bugs, slugs, and all sorts of multilegged critters would descend from the ceilings and fall on the kitchen table, or worse, on our bunks. Rainfall
asked by Charlotte 
Statistics (Reiny)
1. A consumer organization estimates that 30% of the households in a particular community have one television set, 39% have two sets, and 20% have three or more sets. What is the probability that a household chosen at random does not have two sets? A) 0.39
asked by Lisa 
Algebra/Precalculus
How can I verify that f(x)=(x+3)/(x2)and g(x)=(2x+3)/(x1)are inverse functions (i.e. show the process)? Also, how can I solve (g o f)^1, if f(x)=x+4 and g(x)=2x5? Thanks!
asked by Ciera 
Math
How would you solve this inequality 3(n+8)
asked by Jake 
physics
Heather and Matthew walk eastward with a speed of 0.76 meters per second east. If it takes them 50 minutes to walk to the store, how far have they walked? Answer in kilometers
asked by Christian 
science please help
Also why don't we accept the Metric System as it in now used in other countries?
asked by Libby 
Geometry
Help? The midpoint of (segment)AB is M(7,5). The coordinates of point A are (4,1). Find the coordinates of point B.
asked by Amy 
math
If a=3/4 and b=1/3, evaluate: (2a^2+4b)/14b^2
asked by O. 
geometry
There is something wrong with this definition for a pair of vertical angles: “If AB and CD intersect at point P, then APC and BPD are a pair of vertical angles.” Sketch a counterexample to show why it is not correct. Can you add a phrase to correct it?
asked by Anonymous 
chemistry
24.8 mL sample of a 4.63 x 10–2 M solution of NaCl is mixed with a 30.0 mL sample of a 3.67 x 10–2 M solution of AgNO3. What is the mass, in grams, of AgCl precipitate that forms?
asked by pratibha 
chemistry
If you dilute 10.0mL of the stock solution to a final volume of 0.350L , what will be the concentration of the diluted solution?
asked by lissette 
algebra
a 60 inch string is cut in 2 pieces, the first piece is 6" longer than twice the second piece, find th elength
asked by Mayi 
Math
Chen’s father was 25 when Chen was born. In 5 years Chen will be exactly half his father’s age. a. Try to figure out how old Chen is now. Describe how you got your answer. b. Now solve the problem using equations.
asked by Michelle 
Math
When they dial 3 and turn the oven on, it is like pushing the old button 3 times. That means if they start with one pizza in the oven, dial 3, and turn the oven on, they will get 27 pizzas. (33 = 27) Then if they dial 3 and turn the oven on it is like
asked by Michelle 
algebra 1
the base of isosceles triagle is 5 m less than 4 times the length of a side. The perimeter is 67, find the length of each side and the base
asked by Mayi 
Algebra 1
A rectangle has a length of 4x and a width of 4x2. its perimeter is 12 inches find the length and width
asked by Jason 
physics
A motorist travelling at 82 km/hr is being chased by a police car at 121 km/hr. If the police car starts from 4.0 km back, how long does it take to catch the motorist? Leave time in hours.
asked by sarah 
Math
if kelly gave 1/3 of a pizza to holly and 1/5 to diana, how much did she have left?
asked by Haley 
Math
How would you solve this inequality 3(n+8)
asked by Sammy 
Math
Write two algebraic pattern rules for this toothpick pattern. Figure 1 = 3toothpicks Fiqure 2 = 5 toothpicks Figure 3 = 7 toothpicks Figure 4 = 9 toothpicks i need help please. I did 13n for Figure 1
asked by Person 
Science
If sodium,hydrogen,oxyegen,and chrlorine are mixed to gether is it a compund or a mixture?
asked by Jenny 
Economics
1. The law of diminishing returns implies that at some output level: a) Marginal cost must fall b) Average total cost must diminish c) profit increases d) Marginal cost must rise e) Total cost must fall 2. The vertical distance between total cost curve and
asked by Nathan 
Algebra 1
The formula for the volume of a rectangular prism with the length l, width w, and height h is V = lwh. Solve this formula for w.
asked by Anonymous 
physics
A shopper in a supermarket pushes a loaded cart with a horizontal force of 12 N. The cart has a mass of 33 kg. (a) How far will it move in 7.0 s, starting from rest? (Ignore friction.) m (b) How far will it move in 7.0 s if the shopper places her 30 N
asked by sara 
Stats
The Geometric distribution is used when we want to ﬁnd the probability of performing a sequence of trials with X “failures” before the ﬁrst “success”, where a “success” occurs with some probability p. We can denote such a random variable as
asked by Becca 
Materials Transport
You have a vertical plate which is 20 cm square and 0.75 cm thick. The plate has a thermal conductivity of 4 W/mK. The top edge of the plate is kept at a temperature of 325⁰C, and the bottom edge is kept at a temperature of 275⁰C. The vertical edges of
asked by Elaine 
Math
Chen’s father was 25 when Chen was born. In 5 years Chen will be exactly half his father’s age. a. Try to figure out how old Chen is now. Describe how you got your answer. b. Now solve the problem using equations.
asked by peter 
College Statistics
For X ∼ Bin(n, p), show that E(X) = np and Var(X) = np(1 − p) Our book defines this as true, but I don't know how to actually prove it.
asked by Janet 
Math
Casper bought some pencils at $.50 each. He had $3 left after the purchase. If he wanted to buy the same number of note pads at $.80 each, he would be short $1.50. Write a linear equation for the number of pencils he purchased. Then solve it.
asked by Kris 
Stats
For X ∼ Poi(λ), show that E(X) = λ and V ar(X) = λ. (Hint: Find E[X(X − 1)] = E(X2 ) − E(X).)
asked by Becca 
College Statistics
Suppose we want to model the number of rats captured in a single trap in a day, where the average number caught is 5 (i.e. X ∼ Poi(5)). (a) What is the probability of catching 6 rats in one trap in a day? (b) What is the probability of catching 12 rats
asked by Janet 
Algebra 1
Solve b + c = 10/a for a.
asked by Anonymous 
math
how many Km are in 1000dm?
asked by jill 
Physics
A 1.13 kg ball is connected by means of two ideal strings to a vertical, rotating rod. The strings are tied to the rod and are taut. The upper string is 24.0 cm long and has a tension of 31.5 N, and it makes an angle θ2 = 51.0° with the rod, while the
asked by Charlie 
Math PLEASE HELP ME!!
How would you solve this inequality 3(n+8)
asked by Sammy 
Algebra
the perimeter of a triangle is 25 inches. The first side is 6 inches longer than the second side. The third side is 5 inches shorter than twice the second side. Find the length of each side
asked by Jimmy 
Algebra 1 I do not understand
If a circle's circumference is 15 inches, what is its radius?
asked by Anonymous 
Math
(0.8)^2 + (0.5)^2 0.89?
asked by Jerald 
Algebra 1 Please help me!
The formula A = P + I shows that the total amount of money A received from an investment equals the principal P (the original amount of money invested) plus the interest I. Solve this formula for I.
asked by Anonymous 
Science
3) what 2 chemical contaminants that can be found in a freshwater source for each one b) identify a source of contaminants that can be found in a freshwater source for each one. 4) briefly describe how a biological contaminant was able to get into
asked by Help ASAP 
English  Please help quickly!!
I need help with making a thesis statement for an essay I have to write on the book Poisonwood Bible The prompt I have says : Choose a novel or play that depicts a conflict between a parent and a son or daughter. Write an essay in which you analyze the
asked by Tessa 
Math
3(86)^3+27/9= 8?
asked by Jerald 
physics
You throw a ball vertically from an apartment balcony to the ground 14.2 m below. Find the ball's initial velocity if it hits the ground 1.08 s after you release it.
asked by squad 
5th grade math
if kelly gave 1/3 of a pizza to holly and 1/5 to diane how much did she have left?
asked by jerry 
Algebra Please help me
an equilateral triangle has a side of length 2x3. Its perimeter is 51 inches, find the length of each side
asked by Jimmy 
Algebra 1 I do not understand
To find a baseball pitcher's earned run average (ERA), you can use the formula Ei = 9r, where E represents ERA, i represents number of innings pitched, and r represents number of earned runs allowed. Solve the equation for E. What is a pitcher's Era if he
asked by Anonymous 
Social Studies
What ethnic group contributed the St. Joseph's Altar to Louisiana culture ?? a) Chinese b) Italian c) Anglo d) American Indian
asked by victoria 
chemistry
The neutralization of 27.3 mL of an unknown concentration H2SO4 solution requires 72.2 mL of 0.12 M LiOH solution. What is the concentration of the H2SO4 solution (in M)?
asked by kyle J 
Materials Transport
You have a vertical plate which is 20 cm square and 0.75 cm thick. The plate has a thermal conductivity of 4 W/mK. The top edge of the plate is kept at a temperature of 325⁰C, and the bottom edge is kept at a temperature of 275⁰C. The vertical edges of
asked by Elaine 
chemistry
The neutralization of 27.3 mL of an unknown concentration H2SO4 solution requires 72.2 mL of 0.12 M LiOH solution. What is the concentration of the H2SO4 solution (in M)?
asked by kyle J 
chemistry
The neutralization of 27.3 mL of an unknown concentration H2SO4 solution requires 72.2 mL of 0.12 M LiOH solution. What is the concentration of the H2SO4 solution (in M)?
asked by kyle J 
Math
the length of a rectangular garden is 5 meters more than 3 times its width. The perimeter of the garden is 74 meters. What are the dimensions of the garden?
asked by Evelyn 
Algebra  reposting  still need help / direction
the perimeter of a triangle is 25 inches. The first side is 6 inches longer than the second side. The third side is 5 inches shorter than twice the second side. Find the length of each side
asked by Jimmy 
Algebra
the base of isosceles triagle is 5 m less than 4 times the length of a side. The perimeter is 67, find the length of each side and the base
asked by Mayi  In need of help  Please :) 
physics
The position of a toy locomotive moving on a straight track along the xaxis is given by the equation x = t 4 − 6 t 2 + 9 t , where x is in meters and t is in seconds. The net force on the locomotive is equal to zero when t is equal to Answer in units of
asked by Anonymous 
pre algebra
what do they call the internationa hula hoop championship?
asked by Anonymous 
Cam
How is phosphorus evident in estuaries?
asked by Biology 
chemistry
Consider the reaction between hydrogen and oxygen gases to form water: 2H2(g) + O2(g) ¨ 2H2O(l) Which of the following is not conserved in this reaction?
asked by amanda 
algebra
Given the peoblem (3)2 x ( 3 )4 which is the correct answer (3)6 or (9)6 ? Explain how you got the answer
asked by John 
check my work on derivatives
Can someone check my work? So, I took the derivative of (1x^2)/((1+x^2)^2) I used the quotient rule ((2x((1+x^2)^2)2((1+x^2)^2)(2x)(1x^2))) / ((1+x^2)^4) Then I simplified it (2x+2x^2  4x((1+x^2)^2)(1x^2)) /((1+x^2)^4) Then I simplified by factoring
asked by Sarah 
Math
Patrick drove 3 hours to attend a meeting. on the return trip, his speed was 10 mi/h less, and the trip took 4 hours. a) what was his speed each way? b) what is the distance he drove one way?
asked by Evelyn 
algebra
a painter charged $320 to paint two walls that measure 12 feet by 9ft and two walls that measured 10 ft by 9 ft. The client asks him to return to paint two walls that measue 15 ft by 12 ft and two walls that measure 18.5 feet by 12 ft. If the painter
asked by bobby 
Chemistry
Solid copper oxide reacts with ammonia gas according to the following equation: 3CuO + 2NH3 > 3Cu + N2 + 3H20 50 grams of CuO is placed in an 80L reaction vessel, and the vessel was evacuated. Ammonia gas was then gradually introduced into the vessel,
asked by Nikki 
math
Ms. Sue I do not understand this question. Mr. Chen drove his truck 9,438 miles last year. He drove his truck 12,917 miles this year. How much farther did Mr. Chen drive his truck last year?
asked by ezekiel 
Math
what is the minimum distance (in feet) that a batter runs after hitting a home run at Yankee Stadium? Is it the same minimum distance at citi field (formerly Shea Stadium)? Is it the same at all professional ball parks?
asked by Katlyn 
Geometry
The circumference of the ball of string is 415ft and it weighs 13,0000Ib. what is the radius of the ball of string to the nearest tenth of a foot? A. 3.3 B. 6.6 C. 13.2 D. 20.75
asked by George 
Physics
A 1000 kg car rounds a curve of radius 70 m banked at an angle of 12°. What is the magnitude of the friction force required for the car to travel at 82 km/h?
asked by Charlie 
PreCalculus
A local photocopying store advertises as follows. " We charge 14 cents per copy for 150 copies or less, 6 cents per copy for each copy over 150 but less than 230, and 3 cents per copy for each copy 230 and above. " Let x be the number of copies ordered and
asked by Ann 
Geometry
The circumference of the ball of string is 415ft and it weighs 13,0000Ib. Which is the best approximation of the volume of the ball of string? F.300FT^3 G.600FT^3 H.1200FT^3 I.2400FT^3
asked by George 
Geometry
Find the area of each equilateral triangle. The triangle has 12cm sides. The triangle has 10in altitudes.
asked by George 
Geometry
The altitude to the hypotenuse of a right triangle ABC divides the hypotenuse into 12mm and 16mm segments. Find the lengths of each of the following. A. The altitude to the hypotenuse B. The shorter leg of angle ABC C. The longer leg of angle ABC
asked by George 
Geometry
The length of each side of a rhombus is 16. The longer diagonal has length 26. Find the measures of the angles of the rhombus to the nearset degree.
asked by George 
Geometry
Find the area of a regular pentagon with radius 5in.
asked by George 
Geometry
A cylindrical hockey puck is 1in high and 3in in diameter. What is its volume in cubic inches?
asked by George 
Physics ...... Science
A small airplane has a speech of 200km/h with respect to the air. There is strong wind blowing at 77km/h at 23 north of east with respect to the Earth . A) in which direction should the plane head in order to land at an airport due north of its present
asked by Maria 
Math
During a weeklong dry spell,the water level in a pond decreased by 4 inches per day except for two days when it decreased by half of that amount. How much did the water level decrease in the pond in one week?
asked by Anna 
PreCalculus
A ball is thrown up at the edge of a 364 foot cliff. The ball is thrown up with an initial velocity of 72 feet per second. Its height measured in feet is given in terms of time t, measured in seconds by the equation h=−16t2+72t+364. How high will the
asked by Ann 
physics
A cannon is mounted on a railroad car. The cannon shoots a 1.75 kg ball with a muzzle velocity if 300 m/s. The cannon and the railroad car together have a mass of 4500 kg. if the ball, cannon, and railroad car are initially at rest, what is the recoil
asked by Cori 
physical science
calculate the mass and volume of oxygen released when 29;4g potassium chlorate decomposes to form potassium chloride and oxygen
asked by asanda 
physical science
if 96g so2 is added to 2 moles of oxygen at stp, what is the mass of so3 that is formed
asked by asanda 
Algebra 1
Solve for the indicated variable. a + b + c = 180
asked by Anonymous 
chemistry
1. What quantum numbers specify these subshells? 5s: n=? l=? 5p: n=? l=? 3d: n=? l=?
asked by Shira 
chemistry
Identify the neutral element represented by this excitedstate electron configuration, then write the groundstate electron configuration for that element. Excited State: 1s2 2s2 2p2 3s1 Element Symbol: ? Ground State: ?
asked by Kim 
chemistry
Sort these elements into isoelectronic groups. Into three different boxes/sections. Elements: F O2 Al3+ S2 Ti4+ K+ He Li+ B3+
asked by David