Questions Asked on
February 26, 2013

calculus 1
A kite 100 ft above the ground moves horizontally at a speed of 10 ft/s. At what rate is the angle (in radians) between the string and the horizontal decreasing when 200 ft of string have been let out?
asked by heather 
Chemistry
A certain indicator, HA, has a Ka value of 1.3 × 106. The protonated form of the indicator is blue and the ionized form is red. What is the pKa of the indicator? What is the color of this indicator in a solution with pH = 8? Blue, red, or purple?
asked by Nancy 
math
Generate the first five terms in the sequence using the explicit formula. cn= 12n – 11 (1 point)
asked by paige 
math
What is the third quartile, Q3, of the following distribution? 10, 25, 18, 31, 16, 27, 5, 13, 32, 24, 15, 21, 18, 18, 24, 4, 8, 11, 11, 23
asked by re 
Physics
A spherical concave mirror has a raduis of curvature of 6.0 cm. At what distance from the mirror should a 6.0 cm object be placed to obtain an image that is 48 cm tall?
asked by Aa 
physic
a resistor has a voltage of 6.65 V and a current of 4.45 A. it is placed in a calorimeter containing 200g of water at 24 degree Celsius. the calorimeter is aluminum (specific heat= 0.220 cal/gCelsius), and its mass is 60g. the heat capacity of the
asked by julie 
math
Money is invested in a savings account at 3.4% simple interest. After 1 year, there is $1695.76 in the account. How much was originally invested?
asked by Cathy 
Algabra 1
Need help stuck on question. Find the range of f(x)=3g5 for the domain (1.5,2,4) A (8,10,1,1) B (9.5,1,7) C (8,10,1,1) or D (9.5,1,7)
asked by nick 
Math
The elephants at the zoo are fed 1/2 barrel of corn each day. The buffalo are fed 7/10 as much corn as the elephants. How many barrels of corn are the buffalo fed each day?
asked by Kim 
PHYSICS 1 ..'''''''''''''''''''''''' helllpppppppp
A girl of mass (Mg) is standing on a plank of mass (Mp). Both are originally at rest on a frozen lake that constitutes a frictionless, flat surface. The girl begins to walk along the plank at a constant velocity (vgp) to the right relative to the plank.
asked by Rrjey 
math
How long is a rectangular strip of land with a width of 5/4 km and an area of 3/4 square km ?
asked by john 
Chemistry
Comment on the relative acidities of h3po4 and the h2po4 ion? I don't understand what this question is asking? Would H3PO4 is a strong acid and will completely dissociate into ions in aqueous solution suffice?
asked by Todd 
AP Chem
For the following equilibrium system, which of the following changes will form more CaCO3? CO2(g) + Ca(OH)2(s) CaCO3(s) + H2O(l) deltaH(rxn) = 113 kJ My choices are: a) Decrease temperature at a constant pressure (no phase change) B) Increase volume at a
asked by Lisa 
Math
Javia ran 8 laps around a track to run a total of 1 mile on Monday. How many laps will she need to run on Tuesday to run 3/8 of a mile?
asked by Kim 
chemistry 1B
1propanol (P1° = 20.9 Torr at 25 °C) and 2propanol (P2° = 45.2 Torr at 25 °C) form ideal solutions in all proportions. Let x1 and x2 represent the mole fractions of 1propanol and 2propanol in a liquid mixture, respectively, and y1 and y2 represent
asked by Anonymous 
physics
A canon mounted on a pirate ship fires a cannonball at 125 m/s horizontally, at a height of 17.5m above the ocean surface. Ignore air resistance. (a) How much time elapses until it splashes into the water? (b) How far from the ship does it land?
asked by Susan 
math
Trent earned $28,500 last year. He paid $8,265 for rent. What percent of his earnings did Trent pay for rent
asked by joseph 
Geometry
1. Find the diameter of a circle with a circumference of 50 mm. Round your answer to the nearest tenth. a) 16.0 mm b) 26.4 mm c) 8.4 mm d) 33.5 mm 2. Find the area of the circle with the given radius or diameter. Round your answer to the nearest tenth.
asked by Sandy 
Spanish: Please check answers
Please check my answers. The answers are at thebottom. 11. Choose the most logical sentence completion. Yo _______ el libro a la biblioteca. vuelvo devuelvo puedo duermo 12. Choose the most logical sentence completion. Ellos __________ en el café. cuestan
asked by James 
Chemistry
The triprotic acid H3A has ionization constants of Ka1 = 6.8× 10–3, Ka2 = 8.1× 10–9, and Ka3 = 5.0× 10–12. Calculate the following values for a 0.0760 M solution of NaH2A [H+] = ? [H2A]/[H3A]= ? Calculate the following values for a 0.0760 M
asked by Nancy 
Math
a group of 100 students took a quiz. Their average score was 76 points. If the average score for boys was 80 points and the average score for girls was 70 points, how many girls participated in the quiz
asked by Sam 
Physics
A long jumper leaves the ground with an initial velocity of 12 m/s at an angle of 28degrees above the horizontal. Determine the time of flight, the horizontal distance, and the peak height of the longjumper.
asked by Dan 
Chemistry
What fraction of piperazine (perhydro1,4diazine) is in each of its three forms (H2A, HA–, A2–) at pH 7.22?
asked by Nancy 
Algebra
the length of a rectangular piece of land is 40 cm more than two times its width. the perimeter is 680 cm. Find its dimensions
asked by Jenny 
Physics true false
true false The speed of a particle is always positive. True False The average speed of a particle is equal to the magnitude of its average velocity. True False The acceleration of a particle can be nonzero when its speed is constant. True False When the
asked by Robin 
science
7750 Joules of energy is added to a 325 grams stone at 24.0 degrees centigrade. The temperature increases by 75.0 degrees centigrade. What is the specific heat of the stone?
asked by basil 
english
What is a personification expression for hands on a clock?
asked by josh 
Chemistry
In the formula 2C4H10+13O2=10H2O+8CO2 whats the mass of butane needed to produce 79.7g of carbon dioxide.
asked by Anonymous 
PhysicsPLZ HELP!
When the switch is closed in a circuit, the wire between the poles of the horseshoe magnet deflects upward. From this you can conclude that the left end of the magnet is        A) a magnetic dipole. B) not contributing to the wire's
asked by Liz 
math
Triangle GHI is an isosceles triangle. H is the vertex. If the measure of H is 73 degrees what is the measure of G? A.73 B.17 C.34 D.104 A)73 degrees?
asked by Lance 
MATH
a rule of thumb used by car dealers is that the trade in value of a car decreases by 20% of its value each year. suppose the initial value of your car is $23,500. write an equation expressing the trade in value of your car as a function of the number of
asked by Anonymous 
math
Write the decimal for each of the following: 1.) two and fifteen hundredths = 2.15 2.) sixtysix hundredths = 0.66 3.) four and eight hundredths = 4.08. 4.) one and thirty five hundredths. =1.35 5.)ninety nine hundreths = 0.99 6.) seven and twenty
asked by thea 
statistics
Suppose a random sample of 80 measurements is selected from a population with a mean of 65 and a variance of 300. Select the pair that is the mean and standard error of x.
asked by veronica 
shbhvghs
What is the direction of the total electric field at any point on the axis where
asked by ravi 
math
1.) $850 plus 8% on sales of $8,000 2.) $1,200 plus 4.5% on sales of $6,500 3.) You purchase 9 1/2 yards of fabric at $11.00 per yard. If there is a 7% salesb tax, what is the total cost of the fabric
asked by Sabrina 
math
6. Solve by factoring. m² + 8m + 7 = 0 (1 point)8, 7 –7, 1 *–7, –1 7, 1 7. Solve by factoring. n² + 2n – 24 = 0 (1 point)–12, 2 –2, 12 *–6, 4 –4, 6 Please Help
asked by James 
physics
an infinite ladder network of resistance is constructed with 1 ohm and 2 ohm resistances .calculate equivalent resistance between points a and b
asked by maneet 
Lang. Arts
4. Choose the sentence in which the comma helps make the meaning clear. A.If you call, them the dogs will come back. B.If you call them, the dogs will come back. C.If you call them the dogs, will come back. D.If you call them the dogs will come, back I
asked by Cassie 
Physics Power
1.) How much energy does a 60 W light bulb consume in 1 hour? 2.) Beth pulled her brother (m=85 kg) in a 10 kg sled with a constant force of 95 N for 100 m. a) How much work did Beth do in moving her brother? b) How much power did she expend if it took her
asked by Isis 
poetry
In this unit, you read William Wordsworth’s poems “Lines Composed a Few Miles Above Tintern Abbey,” “The World is Too Much with Us,” and “I Wandered Lonely as a Cloud.” How are these poems representative of the Romantic Period?
asked by Whitney 
parallelograms
what is the area of parallelogram lmno
asked by briana 
geometry
A triangle has side lengths 24, 32, and 42. Is it a right triangle? Explain
asked by georgetooraw 
fractions
Adam 3/12,1/6,1/3 Adam used the three fractions to make a circle graph and colored each a different color. What fraction of the graph is not colored?explain your answer.Can anyone help i need to explain to my 4 grader.
asked by ttuuffyy 
Algebra ASAP
Elimination ( show work please) 6x+5y=39 3x+5y=27
asked by Stephanie 
Physics
At a certain instant, a ball is thrown downward with a velocity of 8.0 m/s from a height of 40 m. At the same instant, another ball is thrown upward from ground level directly in line with the first ball with a velocity of 12 m/s. Find (a) the time when
asked by Dan 
Algebra please help me!
4a^2+9b^2+25c^212ab+20ac30bc divided by 2a3b+5c.
asked by Jeconiah 
Chemistry
In the reaction 2H2O2(aq)>2H2O2 + O2 (g), There is intially 0.865 M H2O2. After 10.0 minutes, the molarity of H2O2 changes to 0.792 M. What is the rate of reaction in terms of H2O2?
asked by Crystal 
Chemistry
Are the following electrolytes or nonelectrolytes? 1) CH3CH2CH2OH 2) Mg(OH)2 3) H3CO4CH3
asked by Rena 
Physics
A competitor is aiming to complete a 1500m wheelchair race in less than 4 min. After moving at a constant speed for exactly 3.5 min, there were still 240m to go. What must his acceleration be for the remaining distance if he were to finish the race on
asked by Emilee 
Analytical Chemistry
What fraction of piperazine (perhydro1,4diazine) is in each of its three forms (H2A, HA–, A2–) at pH 7.05? Not sure how to find k1 and k2 needed for the fraction formulas...please help :(
asked by Sam 
chemistry
identify the reducing and the oxidizing agent for each reaction: a) 2na + br2 = 2nabr b) h2 + cl2 = 2hcl c) 2li + f2 = 2lif d) s + cl2 = scl2 e) n2 + 2o2 = 2no2 f) mg + cu(no3)2 = mg(no3)2 + cu
asked by mfsl123 
Science
Can you tell me the Main Idea(s)? There’s an old saying that oil and water don’t mix. But sometimes they do — especially when a chemical called a surfactant brings the two together. Once blended, oil and water become tough to pull apart. Unless, that
asked by Anonymous 
Math
A wheel has a 32 inch diameter. The speed of a point on its rim is 44 ft/sec. What is its angular speed?
asked by Sarah 
law
looking for an article relating to civil law, The article can no be older than December 2010 and it has to relate to the contemporary law and justice. Any suggestions?
asked by Gabby 
Chemistry
2Al(s)+3Cl2 = 2AlCl3 Limiting Reactant is Cl with 0.329mol. What is the maximum mass of aluminum chloride that can be formed when reacting 30.0g of aluminum with 35.0g of chlorine?
asked by Veronica 
algebra
The lines x=4y−a and y=4x−b intersect at the point (1,2). What is a+b?
asked by what is the answer 
Mathgeometry
A regular polygon with all sides that are congruent and all angles that are congruent. Thus, the regular triangles are equilateral triangles, and the regular quadrilaterals are squares. All equilateral triangles are similar to one another and all squares
asked by PLEASE HELP 
World History (Ms. Sue)
In what ways was racism common in both the North and the South?
asked by Victoria 
science
what is the structural formula for a) 3,3,4trimethyloctane B) 2methyl1pentene
asked by bob 
asap math
Divide 70 by 9 and write the answer as a mixed number
asked by noahc 
Chemistry
In a constantpressure calorimeter, 60.0 mL of 0.320 M Ba(OH)2 was added to 60.0 mL of 0.640 M HCl. The reaction caused the temperature of the solution to rise from 23.24 °C to 27.60 °C. If the solution has the same density and specific heat as water,
asked by Blaire 
pysics
A home run just clears a fence 105m from home plate. The fence is 4.00m higher than the height at which the batter struck the ball, and the ball left the bat at a 31.0 degree angle above the horizontal. At what speed did the ball leave the bat?
asked by Susan 
math Please HElp
The minute hand on a watch is 7 mm long and the hour hand is 4 mm long. How fast is the distance between the tips of the hands changing at one o'clock? (Round your answer to one decimal place.)
asked by monic 
Biology
When cells increase in size, the surface area to volume ratio decreases. But which surface area to volume ratio is better to the cell as well as to the organism? The larger or smaller ratio?
asked by Mengistu 
chm
Which of the following is a covalent compound composed of nonpolar covalent bonds? Answer >>H2 H2O CF4 CH4 NaF
asked by jj 
Mathgeometry
A regular polygon with all sides that are congruent and all angles that are congruent. Thus, the regular triangles are equilateral triangles, and the regular quadrilaterals are squares. All equilateral triangles are similar to one another and all squares
asked by Urgent!! 
chemistry
why is HS a stronger BL base compared to HSO4 In a series of oxybases with the same central atom, the base with more O atoms is stronger. In a series of oxybases with the same central atom, the base with less O atoms is stronger. Since H2SO4 is one of the
asked by Hannah 
Physics
Train A starts at 4 miles South of a bridge and heads North at a constant speed of 30 miles per hour. Train B starts 6 miles North of the bridge. a. What velocity must Train B have so that the two trains cross the bridge at the same time? b. If Train B
asked by Dan 
math
f(x)=2x2−146x+c has 2 roots that are positive prime numbers. What is c?
asked by Hardwell 
geom
fill blanks give values of cin terms of pi if r=7m then d=?and c=?
asked by ca 
chemistry
Calculate the theoretical yield (g) of precipitate formed when 10.0 mL of 0.50 M magnesium nitrate is added to 5.0 mL of 0.50 M potassium phosphate? [You must first write the balanced chemical equation.] Which reactant is present in excess?
asked by Joe 
math
how do you convert one half into a decimal?
asked by serenity 
math
Given P=RT/V, make T the subject of the formula
asked by annecia 
physics
motor A lift a steel bar 5000N upward at a constant 2m/s. motor B lift 4000N steel bar upward at a constant 3m/s. which motor is supplying more power?
asked by Anonymous 
Maths
A straight river flows at a speed of 20km/h. A boater starts at the south shore and heads in ths direction of 70degrees from the shore. The boat has a speed of 20km/h in still water. Find the true speed and direction of the boat.
asked by Anonymous 
differential equation urgent !
using method of undetermined coefficients d^2y/dx^2 5 dy/dx+6y=xe^x
asked by deq 
Spanish 1
Complete the sentences with the correct form of ir. todos Los Dias, yo ____ a la escuela
asked by Jade 
Finance
Your board of directors is thinking of taking out a loan of $500,000 for the corporporation. You have to pay $5,500 per month and $50,000 after 10 years. What annual Rate of Return would you hve to achieve on investments to make this a profitable venture?
asked by mary 
Physics
A small lead ball, attached to a 1.50m rope, is being whirled in a circle that lies in the vertical plane. The ball is whirled at a constant rate of three revolutions per second and is released on the upward part of the circular motion when it is 0.75 m
asked by Randy 
Physics
One of the most powerful cranes in the world, operating in Switzerland, can slowly raise a load of 6000 tonne to a height of 12 m. (1 tonne = 1000 kg) The acceleration of gravity is 9.81 m/s2 . How much work is done by the crane? Answer in units of MJ I
asked by Danny 
Broadcast news
we had to write a lead on this news, answering what's the what, whats news, and since its broadcasting we had to be it simple and conversational, as if we were reading it. story: The Bush Administration recently proposed eliminating 20 National Weather
asked by Blaze 
Science ASAP
Can you tell me the Main Idea(s)? There’s an old saying that oil and water don’t mix. But sometimes they do — especially when a chemical called a surfactant brings the two together. Once blended, oil and water become tough to pull apart. Unless, that
asked by Anonymous 
Analytical Chemistry
You prepare a solution from 10.0 mL of 0.100 M MOPS buffer (3morpholinopropane1sulfonic acid) and 10.0 mL of 0.086 M NaOH. Next, you add 1.00 mL of 8.87 × 104 M lidocaine to this mixture Denoting lidocaine as L, calculate the fraction of lidocaine
asked by Sam 
Physics
The radius of the earth is 6.37*10^6 m and its mass is 5.975*10^24 kg. Find the earth's average density to appropriate significant figure.
asked by Arif khan 
Physics
The radius of the earth is 6.37*10^6 m and its mass is 5.975*10^24 kg. Find the earth's average density to appropriate significant figure.
asked by Arif khan 
Algebra
The owner of the studio replaced the tiles last year. The tiles cost $15 for a set of 8 and $2 for each additional tile. What is the monthly increase the owner charged each of her 34 students over a 6month period to cover the cost of replacing the tiles?
asked by Aimee 
help college algebra
given the following piecewise function f(x) = x+1 for x
asked by zachary 
Math
A horse on a merrygoround is 20 ft from the center and travels at 10 mph. What is its angular speed?
asked by Sarah 
Physics
Name the fundamental forces of nature.
asked by Arif khan 
math help
Find the lateral area of a cone with a radius of 7 ft. and a slant height of 13 ft. Use 3.14 for ð and round to the nearest tenth
asked by Abbey 
World History (Ms. Sue)
What were the two ways that the North and the South differed by the mid1800's? My answer: The North had a rapidly growing economy with a large and rapidly growing urban population and no slavery north of the border states. The South was dominated by a
asked by Victoria 
Chemistry
A block of aluminum with a volume of 98.5 cm3 absorbs 67.4 J of heat. If its initial temperature was 32.5 °C, what is its final temperature? (density of aluminum = 2.70 g/cm3) I do not understand how to get the answer
asked by Mon 
Vocabulary
I need help with writing sentences using my vocabularywords
asked by David 
maths
integrate sqrt2/13x
asked by Anonymous 
elecTRICITY
A 9V battery has an electric potential difference of 9V between the positive and negative terminals. How much kinetic energy in J would an electron gain if it moved from the negative terminal to the positive one?
asked by Anonymous 100 
Psychology  Social Problems
Please check my answers. 1. When considering marital separation and divorce as a social problem, an effective approach might be to: __x_a. develop counseling options for couples in crisis. ____b. focus on problems with the institution of marriage itself.
asked by Suzy 
phYSICS!!!
Recently, Asteroid 2012 DA14 came within 34,200 km from the center of the earth at its point of closest approach. If the moon goes around the earth once every 27.5 days, what is the ratio of the distance of closest approach of DA14 to the radius of the
asked by Anonymous 100 
Algebra
The floor of the studio is covered with 615 square tiles that measure 2 feet by 2 feet. The owner of the studio replaced the tiles last year. The tiles cost $15 for a set of 8 and $2 for each additional tile. What is the monthly increase the owner charged
asked by Aimee 
geometry
prove that The sum of the angles in any triangle is 180 degrees is true in Euclidian geometry.
asked by denise 
math
the 2 consecutive multiples of 6 up to 116
asked by tangi 
Chemistry
What is the maximum mass of aluminum chloride that can be formed when reacting 30.0g of aluminum with 35.0g of chlorine
asked by Veronica 
geoMETRY!
ABC is an acute angle triangle with points D and E on BC and AC, respectively such that BE and AD are altitudes. AD and BE intersect at H. If ∠BCA=39∘ and ∠EBA=2∠DAB, what is the measure of ∠ABC (in degrees)?
asked by BATMAN 
economic and management science
discuss the development of money
asked by lindokuhle 
Spanish: PLEASE HELP
Please help. Thank You. 1. The stemchangers in the current section are similar to those in the previous section except these stemchange "o" to "oe." *A.) true B.) false 2. Of the following, which is not a stemchanging verb? A.) almorzar *B.) comer C.)
asked by James 
algebra
How many pairs of integers (not necessarily positive) are there such that both a2+6b2 and b2+6a2 are both squares?
asked by robin! 
algebra!
The lines x=4y−a and y=4x−b intersect at the point (1,2). What is a+b?
asked by robin! 
Chemistry
Identify the true statement about Lewis structures. Select all the correct answers. 1. Hydrogen is usually surrounded by 4 electrons in a valid Lewis structure. 2. A single bond in a Lewis structure represents 2 electrons. 3. A double bond in a Lewis
asked by will.i.am 
physics
IF A 0.5 Kg baseball(at rest) is hit by a bat with a force of 200.0 N what is the magnitude of the baseball just as it is leaving the bat?
asked by RICHARD 
Math
The perimeter of a quilt had to be 34 feet because he only had that much binding. If he wanted it to be 8ft long what would its area be?
asked by Trent 
algebra!
The number 1003003001 is the product of N (not necessarily distinct) primes. What is the value of N?
asked by what is the answer 
LAW
looking for an article relating to civil law, The article can no be older than December 2010 and it has to relate to the contemporary law and justice. Any suggestions?
asked by Gabby 
world history
What is the answers to study guide chapter 12 part 3?
asked by juju 
Chemistry
A block of aluminum with a volume of 98.5 cm3 absorbs 67.4 J of heat. If its initial temperature was 32.5 °C, what is its final temperature? (density of aluminum = 2.70 g/cm3) I do not understand how to get the answer
asked by Mon 
o.chem
how would doubling the concentration of the nucleophile affect the rate of an sn2 reaction?
asked by sara 
chemistry
what is the structure of H2P2O6?
asked by nitesh solanki 
science
Expain why deepa sea fishes are not crushed by the pressure of all of the water above them. I think maybe its because their density or mass is higher? Am I right?
asked by Dave 
Math
The wheels of a bicycle have a 24 inch diameter. When the bike is being ridden so that the wheels make 12 rpm, how far will the bike travel in one minute?
asked by Kay 
Math
Triangle ABC is an isosceles triangle If the measure of B is 37 degrees what is the measure of C? A.37 B.53 C.106 D.143 I think it's A or C?
asked by Lance 
math
The blackberry cobbler recipe makes 8 equal servings. Nina, Jack, and Cameron each ate 1/4 of the servings. How many servings of cobbler were left over?
asked by Bianca 
Physics
A current of 4.6 A is measured through a 7.8 ohms resistor for 1.75 minutes. How much heat is generated by the resistor?
asked by Brittany 
Engineering Economy
What is the future worth of $1,000 in month 1, $1,040 in month 2, and amounts increasing by $40 per month through month 12, at the end of year 2 if the interest rate is 23.7631528% per year, compounded continuously?
asked by ANdy 
Math
Susan was awake for 2/3 of an entire day. If she spent 3/7 of her time awake at work, what fraction of the day was she at work?
asked by Kim 
Broadcast/english
we had to write story in correct broadcast form in correct broadcast form, and include the soundbite. Based on this false information information: Kalamazoo, Michigan, is experiencing a severe snowfall which began yesterday. Past record snowfalls in
asked by Blaze 
Physics
A current of 4.6 A is measured through a 7.8 ohms resistor for 1.75 minutes. How much heat is generated by the resistor?
asked by Brittany 
Math
Cathy made 25 cupcakes for the friends at her party. If only 4/5 of her friends showed up, how many cupcakes does she have left?
asked by Kim 
math
1/8 inch= 5 mile, then 1 inch = how many miles
asked by Len 
Age Probs
Lisa is 16 years younger than Andy. In 6 year, the sum of their ages id 42. How old is Lisa now?
asked by Daniella 
Algebra
The floor of a dance studio is covered with 615 tiles. The owner of the studio replaced the tiles last year. The tiles cost $15 for a set of 8 and $2 for each additional tile. What is the monthly increase the owner charged each of her 34 students over a
asked by David 
math
what is 4x+2=26,then 4x8=
asked by matt 
Calc
find the derivative of y =(x+3)^3 / sqrt(x^2 1) using logarithmic differentation.
asked by Lost One 
English 8R  HELP!
How did Active Reading lend itself to the ELA Short Response Questions?
asked by Laruen 
Algebra
The floor of a dance studio is covered with 435 tiles. The owner of the studio replaced the tiles last year. The tiles cost $15 for a set of 8 and $2 for each additional tile. What is the monthly increase the owner charged each of her 34 students over a
asked by Aimee 
Canadian Law
1)How has batteredwoman syndrome been used in criminal court cases in recent years? 2)Compare the Lavallee and Malott cases. How are they similar and how are they different? 3)Why do you think many abused woman drop the charges against their abusive
asked by Kristein 
physics.... please help
A ball is dropped from a height of 5.67 m. If the ball rebounds with a speed of 4.22 m/s, what is the coefficient of restitution? a. .40 b. .74 c. .56 d. 1.23 I've ruled d out because it is greater than 1.
asked by Kaci 
science
Expain why deep sea fishes are not crushed by the pressure of all of the water above them. I think maybe its because their density or mass is higher? Am I right?
asked by Dave 
chemistry
Commodity prices of NaCl and urea are about $0.033/lb for NaCl (as rock salt) and about $0.10/lb for urea. Calculate the cost of treating 1000 lb of ice on a surface to produce a solution that melts at 3.9 degrees Celsius with each chemical. I know you
asked by K 
math
Maisie is writing a report about kangaroos. The report must be two full pages. If there are twenty lines on each page and each line has about 20 words, about how many words long does Maisieʼs report need to be?
asked by Anonymous 
MATH
HOW DO YOU CALCULATE THIS? 5:05 PM SUBTRACT 1.9 HOURS?
asked by Anonymous 
History
Why did the Second Great Awakening lead to reform movements?
asked by Darcy 
Physics
A horse on a merrygoround is 20 ft from the center and travels at 10 mph. What is its angular speed?
asked by Kay 
Chemistry
what is the freezing point of 16.7g of LiCl in 136g of water, assuming complete dissociation for water kf= 1.86/mol
asked by Chloe 
Chemistry
what is the freezing point of 16.7g of LiCl in 136g of water, assuming complete dissociation for water kf= 1.86/mol
asked by Chloe 
algebra
The cost equation for screeners (tshirt shop)was y=50+7x and the cost equation for teasers (tshirt shop) was y=78+5x write one equation that will tell you the number of tshirts when the cost is the same
asked by Giovanna 
Chemistry
what is the freezing point of 16.7g of LiCl in 136g of water, assuming complete dissociation for water kf= 1.86/mol
asked by Chloe 
Chemistry
what is the freezing point of 16.7g of LiCl in 136g of water, assuming complete dissociation for water kf= 1.86/mol
asked by Chloe 
English
1. The defenders of the Alamo put up such a (burly dogged) resistance that the enemy had a hard time capturing it dogged 2.To avoid a lot of unwanted attention the famous rock star registered in the hotel under a(n) (rummage alias) alias 3.An art historian
asked by Jerald 
Physics
I'm trying to rank the maximum temperatures of water at 20 degrees Celsius after adding in heated copper cylinders. The first case is 1 cylinder at 22.5 degrees Celsius. Second is two cylinders at 25 degrees Celsius. Third is 3 cylinders at 25 degrees
asked by Snowy 
math
what should you do if at first you don't succeed? its a riddle and the letters are y,t,o,r,h,p,s
asked by jacob 
math
write the simplest form 2.30
asked by Blake 
physical
what are the limitations on practical interstellar travel for both manned and unmanned craft and what are some proposed ways to deal with them in the future?
asked by sasha 
Math
if a person deposits $304 per year for 13 years and makes $4275, how much interest did he make per year?
asked by Jill 
math.chapter 8.
what does do not replace it mean
asked by freddy mejia 
Eng1511
Summarize the sequence of events leading to the write's proposal to mimmy.highlight the details of the couple's journey to finding love
asked by Nqobile 
language arts
I want a compostion on the moon
asked by kelly 
calculus
what is the limit of (9x/(9x+5))^(6x) as x approaches infinity?
asked by brad 
English
Word box: alias amble burly distort dogged dumbfounded extinct fossil grit inevitable ingrained meteoric parody prevail rend replenish rummage skimp sleuth vandalism 2.We were nothing less than ____ when we saw the immense damage that the hurricane had
asked by Jerald 
calculus
evaluate the following limit... ((1x)/((1/e)(e^x))) as x approaches one
asked by brad 
English
Whats the nouns and verbs in this sentences ? Seek his will in all you do and he will direct your paths
asked by Anonymous 
calculus
Find the value for W when the limit as x approaches 8 of ((2x^2)7x + W)/(x8) = 25
asked by brad 
hurry past bedtime
As a mixed number what is 70÷9
asked by noahc 
Math
The owner of a luxury motor yacht that sails among the 4000 Greek islands charges $430 per person per day if exactly 20 people sign up for the cruise. However, if more than 20 people (up to the maximum capacity of 90) sign up for the cruise, then each fare
asked by Selena (Please Help) 
physics
You are in the lab with a 10 V battery. You have a 10 W light bulb and you want to put 1/2 A of current through the light bulb and 5 V across the light bulb. This will allow the light bulb to have a brightness proportional to 2.5 W. Assuming any resistors
asked by jamie 
Algebra 2
a.) the number of terms b.) the first term c.) the last term d.) evaluate the sum 5 E (3+n) n=1 8 E 2n/3 n=1 I don't know what the symbol is for the equation but it looks like an "E"
asked by natasha 
mat/116
What would be the value of expressing something like the national debt in scientific notation? What information would be lost in such a usage? Is that important? Explain why or why not
asked by meka a 
algebra
If you bought 24 cards for $50, one card is $1 each and he other card is $5. Write an equation and solve.
asked by mariah 
math
why does lxw=a work
asked by sam 
Calculus Help
Evaluate the indefinite integral. ∫4dx/(xln(x))
asked by Anonymous 
Math
Pls help me find the volume of rectangular prism: Width 23cm Height 8cm Length 14.2
asked by Faisal 
College physics
According to test performed by the manufactures, an automobile with an initial speed of 75 km/h has a stopping distance of 25 m on a level road. assuming that no skidding occurs during breaking, what is the value of μ , between the wheels and the road
asked by Sneakatone 
math
A bakery can sell muffins for $1 each. If it costs the bakery $5 to make 20 muffins, what percent of the money?
asked by Anonymous 
math
Lane French had a bad credit rating and went to a local cash center. He took out a $100 loan payable in two weeks at $115 (In other words, in two weeks he paid back a total of $115). What is the percent of interest paid on the loan? Do not round
asked by Iliyan 
precalculus
the foci of an ellipse are (0,2) (0,2) and the eccentricity is 1/2. determine the equation of the ellipse. write your answer in standard form.
asked by yumi 
English
16.Isnt it foolish to think that just because of his (meteoric burly) physique he has no interest in art or music? burly 17.We scorn all those who would deliberately bend the truth and (distort amble) history in order to suit the political needs of their
asked by Jerald 
Chemistry
calculate the energy in joules lost when 70.0 grams of water cools from 86.4 celsius to 7.1 celsius
asked by anon 
English
Word box: alias amble burly distort dogged dumbfounded extinct fossil grit inevitable ingrained meteoric parody prevail rend replenish rummage skimp sleuth vandalism 1.There is an old saying that nothing is really ____ except death and taxes inevitable
asked by Jerald 
fractions
Adam used the three fractions to make a circle graph and colored each a different color. What fraction of the graph is not colored?explain your answer.Can anyone help i need to explain to my 4 grader.
asked by ttuuffyy 
English
Which word has the same beginning sound as special? sunny swept sprout speed speed
asked by Hayden 
Statistics
A simple random sample of 120 SAT scores ahs a mean of 1540. Assume that SAT scores have a population standard deviation of 333. a) Construct a 95% conf. interval estimate of the mean SAT score. b) Is a 99% conf. interval estimate of the mean SAT score
asked by Sandy 
college physics
You are in the lab with a 10 V battery. You have a 10 W light bulb and you want to put 0.75 A of current through the light bulb and 7.5 V across the light bulb. This will allow the light bulb to have a brightness proportional to 5.625 W. Assuming any
asked by michelle 
AP Calculus BC
A curtate cycloid is defined by the equations x = 2t  sin t and y = t  cos t. If I walk along the cycloid, how far will I walk in 10 seconds?
asked by Marcia 
math
Write an explicit formula for the sequence onehalf, threesevenths, onethird, fivenineteenths, threefourteenths, ... Then find a14. (1 point) an = an – 1 – n minus one over seven n; fifteeen over one hundred nintey nine an = a sub n plus one over n
asked by paige 
government
. The source of the Supreme Court’s authority is (Points : 1) moral suasion. judicial activism. concurring opinion. dissent.
asked by KB 
English
Help! I need help unscrambling these letters into two words it is due tommorow! The letters are tttrrlnemisianaaon it is the name of a mall, remember its a two letter word
asked by Alex 
science
what are human factors that causes illhealth,accidents and disasters
asked by lebogang 
math
jason made 42 bottles of orange juice drink to give to his class. How many pints of juice drink did jason make if each bottle holds 8 fl oz
asked by kelsey 
MATH
PLEASE EXPLAIN. I DO NOT GET IT!!!!!!!!!HOW DO YOU CALCULATE THIS? 5:05 PM SUBTRACT 1.9 HOURS?
asked by Anonymous 
pROBABILITY AND STATISTIC..HELP...................
a missile protection system consists of n radar sets operating independently each with probability .9 of defecting an aircraft entering a specified zone.all radar sets cover the same zone.if an airplane enters the same, find the probability that it will be
asked by Rrjey 
Math ! Please Help !
1.Graph the polar equation r=32sin(theta) 2. Find the polar coordinates of 6 radical 3,6 for r > 0. 3. Find the rectangular coordinates of (7, 30°). 4. Write the rectangular equation in polar form. (x – 4)2 + y2 = 16 5. Write the equation –2x + 6y =
asked by Becca 
English
Word box: alias amble burly distort dogged dumbfounded extinct fossil grit inevitable ingrained meteoric parody prevail rend replenish rummage skimp sleuth vandalism 3.As the buffalo began to decrease sharply in numbers conservationists feared that it
asked by Jerald 
Calculus please help !
1.Graph the polar equation r=32sin(theta) 2. Find the polar coordinates of 6 radical 3,6 for r > 0. 3. Find the rectangular coordinates of (7, 30°). 4. Write the rectangular equation in polar form. (x – 4)2 + y2 = 16 5. Write the equation –2x + 6y =
asked by Becca 
math
Given the equation 2x + 8y = 6, answer the following questions: If x decreases by 2 units, what is the corresponding change in y? ??
asked by Janise 
Precalculus; urgent ! Please help !
1.Graph the polar equation r=32sin(theta) 2. Find the polar coordinates of 6 radical 3,6 for r > 0. 3. Find the rectangular coordinates of (7, 30°). 4. Write the rectangular equation in polar form. (x – 4)2 + y2 = 16 5. Write the equation –2x + 6y =
asked by Becca 
Latin
Check my translations please! 1. Aeneas was ordering the men to run. Aeneas viros currere iubebat. 2. The pretty queen persuades the Trojan to stay. Regina pulchra Troianum manēre persuadet. 3. A tyrant is not able to give freedom to the people. Tyranni
asked by Anonymous 
math
The owner of a luxury motor yacht that sails among the 4000 Greek islands charges $430 per person per day if exactly 20 people sign up for the cruise. However, if more than 20 people (up to the maximum capacity of 90) sign up for the cruise, then each fare
asked by Ashton 
biology
what characteristics appear to show consistent development over the 4 million years of hominid evolution?
asked by alex 
math
Driver A had been leading archrival B for a while by a steady 3 miles. Only 2 miles from the finish, driver A ran out of gas and decelerated thereafter at a propertional to the square of his remaining speed. One mile later, driver A's speed was exactly
asked by angah 
math
use Method of variation of parameter y''+y = tan^2 t
asked by angah 
chemistry
How much heat in joules is required to heat a 44g sample of aluminum from 76 F to 148 F?
asked by tish 
math
by using method of undetermined coefficients d^2y/dx^2 5 dy/dx+6y=xe^x
asked by angah 
mathsCircles
There are two equal chords AB and and CD of a circle whose centre is O , when produced meet at point E. prove that EB=ED and EA=EC
asked by Anonymous 
Physics
A train is moving towards a destroyed bridge. The velocity of the train remains constant at 20 m/s. A person inside the train realizes that they will die unless they run to the back of the train and jump out. If the person is 15 m from the back of the
asked by Dan 
MONGU COLLEGE
1.Determine the sum of infinity of the series 4,2,1
asked by barotseland network 
math
The relationship between the temperature in degrees Fahrenheit (°F) and the temperature in degrees Celsius (°C) is F=(9/5)C+32 (b) What is the slope of the line? ?? What does it represent? (a) It doesn't represent anything. (b)It represents the constant
asked by Ashton 
math
A bakery can sell muffins for $1 each. If it costs the bakery $5 to make 20 muffins, what percent of the money made from muffins sales is profit
asked by rachie 
World History (Ms. Sue)
What are the effects of California's application for statehood?
asked by Victoria 
math
A community is considering increasing the sales tax rate 0.5% to fund a new sports arena. If the tax rate is raised, how much more will you pay in sales tax on $500?
asked by betsy 
Spanish: Please help
Please help. Thank You. 1. The stemchangers in the current section are similar to those in the previous section except these stemchange "o" to "oe." A.) true B.) false 2. Of the following, which is not a stemchanging verb? A.) almorzar B.) comer C.)
asked by James 
MONGU COLLEGE
find the line perpendicular and passes through (0,0) 5x2y =10
asked by barotseland network 
math
Julie has been offered two jobs. The first pays $400 per week. The second job pays $175 per week plus 15% commission on her sales. How much will she have to sell in order for the second job to pay as much as the first?
asked by crystal 
Please help quick. Algebra
solve: 2x^23x+5 divided by 2x1
asked by Jeconiah 
Electromagnetic spectrum
Some astronomical objects emit no visible light but are known through (blank?) and radio images; satellite observations (blank?) Earth's atmosphere help scientists study space at wavelengths that do not reach Earth's surface?
asked by Anonymous 
Humanities
the 15 point important events and impact of the renaissance timeline, in details pls
asked by Johnny Cruzer 
math
f(x)=2x^2−146x+c has 2 roots that are positive prime numbers. What is c?
asked by Hardwell 
math
the second angle of a triangle is twice the first angle. The third angle is five more than four times the first angle.Find the measure of the second angle.
asked by Cathy 
geometry
A radio tower casts a shadow 170 feet long. The angle of elevation of the sun is 43 degrees. How high is the tower? Round to hundredths.
asked by Anonymous 
Analytical Chemistry
Show the predominant form of the amino acid tyrosine at pH=13.9 and ph=7.8. Be sure to include the proper number of hydrogens on heteroatoms and the correct formal charges on atoms. I calculated the pka values for COOH (pka=2.41) NH3 (pka=8.67), and OH
asked by Sam 
Physics
A pitcher throws a baseball with a horizontal velocity of 132 ft/s (90 mph) toward home plate that is approximately 60 ft. away. What is the vertical drop of the ball when it reaches the plate? g = 32 ft/s^2.
asked by Dan 
math
f(x)=2x2−146x+c has 2 roots that are positive prime numbers. What is c?
asked by Hardwell 
physical
A small dog is trained to jump straight up a distance of 1.2 m. How much kinetic energy does the 7.2kg dog need to jump this high? (The acceleration due to gravity is 9.8 m/s².)
asked by chelsea 
Math
A tree is 15 ft tall. It casts a shadow 20 ft long. an 8 ft elephant approaches. how long will the elephant's shadow be?
asked by DJ 
math
The stopping distance D of a car after the brakes have been applied varies directly as the square of the speed s. A certain car traveling at 70 mi/h can stop in 343 ft. What is the maximum speed it can be traveling if it needs to stop in 160 ft?
asked by El 
math
Donna is 12 years younger than her brother. in 2 years she will be 14 years more than as half as her brother .how old is each now
asked by althea 
communication skills
what does the letters RX mean in communication skills.
asked by barotseland network 
Maths
Please help me solve this differential equation : x^3+ ¡¼(y+1)¡½^(2) dy/dx=0
asked by Taldil 
Maths
Please help me solve this differential equation: dy/dx(1+1/x)y=y^2
asked by Taldil 
Maths
Please help me solve this differential equation: dy/dx+ytanx=y^3¡¼sec¡½^4x
asked by Taldil 
math
Given P=RT/V,make T tgd subject of the formula.
asked by annecia 
maths
What is the total capacitance of capacitors connected in series, C1=25F, C2=125F ? Round result to whole number.
asked by mano 
math
john hunt has invested $500.00 in a savings account that pays 6% annual interest, compounded quarterly. After the second quarter of interest has been credited, what is the amount in the account?
asked by Anonymous 
Pre calculus, vectors
A straight river flows at a speed of 20km/h. A boater starts at the south shore and heads in ths direction of 70degrees from the shore. The boat has a speed of 20km/h in still water. Find the true speed and direction of the boat.
asked by Halala 
Algebra
Exponents: Simplify the expression 7ab^2 / 3w I got 7a3w / b^2 Is this correct?
asked by Casey 
math
what is 7 over 24 converted into simplest form?
asked by serenity 
6th grade math
n/4 +32=32 I can get it n/4=40 but not sure how to get n by itself????
asked by Susan 
Math
Find the product write answer in scientific notation (3 x 10^6) * (2 x 10^12) I got. .6 x 10^ 9
asked by Marco 
Chemistry
How many moles of magnesium sulfate are needed to make in a solution of 0.10g Mg2SO4?
asked by Rena 
geometry
what is the perimeter of a pool 7ft wide 10ft long 4ft high? Is it 34ft squared?
asked by Nic 
6th grade math
n/4+32=72
asked by Susan 
Math HELP PLEASE! QUICK!
1.Write the rectangular equation in polar form. (x – 4)2 + y2 = 16 2.Write the equation –2x + 6y = 7 in polar form. 3.Graph the polar equation 2 = r cos(theta – 20°). 4. Write the polar equation in rectangular form. r = –12 cos
asked by Beccaboo 
Chemistry
Would you expect the pressure of a 12.5 mL syringe of natural gas to be the same as the pressure of 12.5 mL of air? In other words, is Boyle's Law dependent on the type of gas that is being measured?
asked by Margaret 
Precalculus HELP PLASE !
1.Write the rectangular equation in polar form. (x – 4)2 + y2 = 16 2.Write the equation –2x + 6y = 7 in polar form. 3.Graph the polar equation 2 = r cos(theta – 20°). 4. Write the polar equation in rectangular form. r = –12 cos
asked by Beccaboo 
math
Find the solution x of the following equation : 12X =32.
asked by gary 
Life orantation
What,according to the Basic Conditions of employment applies with regard to the contraventions?
asked by S'bongile 
Chemistry
Phosphoric acid, H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH, and the concentrations of all species in a 0.100 M phosphoric acid solution. pKa1 = 2.16 pKa2 = 7.21 pKa3 = 12.32 [H3PO4] = ?
asked by Nancy 
Algebra
3(x  2) 1 > 2  5(x 6)
asked by Crystal 
Humanities
the 15 point important events and impact of the renaissance timeline, in details pls
asked by Johnny Cruzer 
Spanish
Please help. Thank You. 1. The stemchangers in the current section are similar to those in the previous section except these stemchange "o" to "oe." A.) true B.) false 2. Of the following, which is not a stemchanging verb? A.) almorzar B.) comer C.)
asked by James 
Algebra
Jim is 45 years old. He is 10 years older than 5 times his niece Carol. How old is Carol
asked by Circa 
Math
Wirte an exponential growth model. 22. A business had a $20,000 profit in 1990. Then the profit increased by 20% per year for the next 10 years. y=c(1+r)^t y=20,000(1+0.2)^10 Is that correct?
asked by Emma 
Chemistry
How many moles of NaOH are in 13.2 mL of 3.00 M NaOH?
asked by John 
Differential Equations
Driver A had been leading archrival B for a while by a steady 3 miles. Only 2 miles from the finish, driver A ran out of gas and decelerated thereafter at a proportional to the square of his remaining speed. One mile later, driver A's speed was exactly
asked by Won 
Chemistry
Using the balanced equation of: HCl+NaOH>H20+NaCl, how many moles of HCl could be neutralized with 13.2 mL of 3.00 M NaOH?
asked by Alicia 
Alg. I
(5d^5) (6d^2) 30d^3 I know that d^3 goes on the bottom to make it positive;however,does 30 go on the bottom as well? Please explain the rule(s) for this. Thanks
asked by Jane 
world geography
How has the United States economy impacted its relationship/s with other countries
asked by delores 
math
If you invest $2500 for one year, part at 8% and part at 12%.....how much was invested at each percentage rate if they both earned the same amount of interest?
asked by kallista 
Life orantation
What,according to the Basic Conditions of employment applies with regard to the contraventions?
asked by S'bongile 
Psychology  Please check my answers
1. When considering marital separation and divorce as a social problem, an effective approach might be to: __x_a. develop counseling options for couples in crisis. ____b. focus on problems with the institution of marriage itself. ____c. develop
asked by Suzy 
calculus
Use logarithmic differentiation: F(x)= (3x+6)^4 (x^3 2)^5 f'(x)=
asked by Trevor 
math
61x0+2÷2 Please help me
asked by Melea 
Math
What has a product of 320 and a sum of 36?
asked by HELP!! 
math
61x0+2÷2 Please help me
asked by Melea 
Math
Given the points A(0,0)B(3,1), and C(1,4), what is the measure of angle ABC?
asked by Anonymous 
physics
A 200 gram ball gets dropped from a roof at 15 meters high. A boy on the ground catches it. If 10 percent is translated to internal energy, then what was the increase of internal energy? Is it safe to be playing ball from the roof top?
asked by Anonymous 
science
50 ml of water in a beaker will exert what pressure on the beaker than 50ml of water in a 350ml beaker
asked by lilt 
physics
the moment of inertia of a thin uniform rod of mass M and length L about an axis passing through a point midway between the centre and one end perpendicular to its length is 
asked by maheshwari 
Physics
Highspeed stroboscopic photographs show that the head of a 197 g golf club is traveling at 36.8 m/s just before it strikes a 45.9 g golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 25.9 m/s. Find the speed
asked by josh 
physics
If a boat is being tugged by 2 tug boats 20000 newtons north, the river is flowing at 5000 newtons south what direction is the boat and what's the velocity?
asked by Anonymous 
Math
Mark has received a tax refund. He used 1/4 of the money to pay off his credit card. Than he spent 1/3 of the remaining money on new clothes and shoes for his kids. After shopping he used 1/5 of what was left to go out to eat. Finally, donated 1/2 of what
asked by Circa 
Physics
In the sport of skeleton a participant jumps onto a sled (known as a skeleton) and proceeds to slide down an icy track, belly down and head first. In the 2010 Winter Olympics, the track had sixteen turns and dropped 126 m in elevation from top to bottom.
asked by Bonny 
math
As a a test of a new measurement process, 10 measurements are made on pieces of glass known to have conductivity 1. The average of the 10 measurements is 1.07. Indicate whether 1 and 1.07 is a parameter or statistic and explain why. I understand that 1.07
asked by Please help 
Physics
Highspeed stroboscopic photographs show that the head of a 197 g golf club is traveling at 36.8 m/s just before it strikes a 45.9 g golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 25.9 m/s. Find the speed
asked by dallas 
Math
1)A bakery can sell muffins for $1 each. If it costs the bakery $5 to make 20 muffins, what percent of the money made from muffins sales is profit? 2) A community is considering increasing the sales tax rate 0.5% to fund a new sports arena. If the tax rate
asked by Betsy 
Life orientation
Ways in which pollution(water,air,land)impact the community,provide relevent sources to support your claims
asked by Anonymous 
Comm/330
what are other kinds of secondary groups.
asked by Anita 
Spanish: Please help
Please help. Thank You. 1. The stemchangers in the current section are similar to those in the previous section except these stemchange "o" to "oe." A.) true B.) false 2. Of the following, which is not a stemchanging verb? A.) almorzar B.) comer C.)
asked by James 
chemistry
I need to find the radius of a cylinder with only the following info: Cylinder height=125um There is 1 C atom/0.01848 nm^2 There are 5.75x10^10 C atoms on the surface of cylinder Use quadratic formula to solve
asked by kelly 
Algebra
f(x) is a polynomial such that f(1) = 8 and f(3) = 16. r(x) is the remainder when f(x) is divided by (x1)(x3). What is r(5)?
asked by John 
science
Why do manufacturing industries have more problems controlling pollution then other kinds of businesses have?
asked by Lori 
physic
Martha drops a 1 kg rock off the top of Black Oak Canyon which is 100m deep. What is the KE of the rock the instant before it hits bottom? Hint: Conservation of energy states that PE = KE
asked by POTENTIAL & KINETIC ENERGY PRACTICE 
Creative writing
I want to write a story that is told ONLy through one person's mind; what this one person is thinking and saying, with no other characters speaking. How would you go about formatting it?
asked by Millie 
Science 8R  HELP!
what is the difference between weathering and erosion???
asked by Laruen 
Linear Algebra
Prove that If a vector space is of dimension n and a set of vectors spans V, then that set of vectors must be linearly independent.
asked by John 
FINANCE
What will $10,000,000 be in 12 years if it earns 7% and you add $5,000 at the beginning of every month?
asked by mary 
differential equation urgent !
using Method of variation of parameter y''+y = tan^2 t
asked by deq 
Math
Find product and write answer in scientific notation (3 x 10^6). * (2 * 10^12) I got .6 x 10 ^19 Is this right?
asked by Marco 
differential equation urgent !
Driver A had been leading archrival B for a while by a steady 3 miles. Only 2 miles from the finish, driver A ran out of gas and decelerated thereafter at a propertional to the square of his remaining speed. One mile later, driver A's speed was exactly
asked by deq 
american lit
the representation of the harshness of the praire on my antonia novel i have to write a three paragraph essay thanks
asked by Anonymous 
3rd grade math
one 10 is regrouped as 10 ones in each number. work backwards. write the number with 10 ones grouped as 1 ten again. 1.tens ones 5 15
asked by mythreyee 
science
What is the highest and lowest temperature in the exosphere? or just the highest temperature.
asked by Anonymous 
Science
what are some health risks of copper to humans? what are the environmental riks of copper? what are the benefits of copper to the industry, economy, and society? what are all the organisms that are affected by copper? what is meant by the term
asked by Louis 
3rd grade
you have 3 dimes. you need a quarter to use a public telephone. what can you do?
asked by mythreyee 
Physics
A 64.7 kg astronaut is on a space walk away from the shuttle when her tether line breaks. She is able to throw her 14.1 kg oxygen tank away from the shuttle with a speed of 7.45m/s to propel herself back to the shuttle. Assuming that she starts from rest
asked by Ted 
physics
What is the KE of a 9 kg mass at 2 m/s?
asked by POTENTIAL & KINETIC ENERGY PRACTICE 
college chemistry
during a liquidliquid extraction the procedure often calls for the use of saturated NaCl when ether is used as the extraction solvent, but not when dichloromethane is used. why?
asked by Anonymous 
social studies
what is the nerve center of the american presidency?
asked by chri 
College Algebra
Provide one example to show how you can use the Expected Value computation to assess the fairness of a situation (probability experiment). Provide the detailed steps and calculations.
asked by Stacy 
Physics
An 67.6 kg object moving to the right at 38.7 cm/s overtakes and collides elastically with a second 48.9 kg object moving in the same direction at 19.2 cm/s. Find the velocity of the second object after the collision. Answer in units of cm/s
asked by colby 
math
what is the probability of drawing 5 queens from a standard deck of cards?
asked by mary 
Physics
A person pushes a 23.5kg shopping cart at a constant velocity for a distance of 30.3 m on a flat horizontal surface. She pushes in a direction 31.5 ° below the horizontal. A 37.3N frictional force opposes the motion of the cart. (a) What is the
asked by Randy 
Ms. Sue please help
What is the highest temperature in the exosphere.
asked by Bob 
Physics
The concepts in this problem are similar to those in MultipleConcept Example 4, except that the force doing the work in this problem is the tension in the cable. A rescue helicopter lifts a 72.4kg person straight up by means of a cable. The person has an
asked by Randy 
College Algebra
Develop a tree diagram for tossing two, eightsided gaming dice to figure out how many possibilities there are. Discuss the purpose of using such a visual in working out probability.
asked by Stacy 
Chemistry
What volume of 1.60 M SrCL2 is needed to prepare 525 ml of 5.00mM SrCl2?
asked by Candace 
spainsh 2 help please
can someone check my answers please? 1. Si yo Tuviera Hambre, Me volvería a comer (comer.) 2. Si el bebe Tuviera sueño, eL estaría en bed (dormir.) 3. ¿Que te necesito to (gustar) pedir? 4. Me loved (gustar) las pechugas de pollo. 5. Si yo fuera Tom
asked by alexus 
Physics
A bicyclist rides 2.78 km due east, while the resistive force from the air has a magnitude of 6.52 N and points due west. The rider then turns around and rides 2.78 km due west, back to her starting point. The resistive force from the air on the return
asked by Randy 
Multivariable Calculus
Find the linearization L(x,y)of the function f(x,y) at P_0. Then find an upper bound for the magnitude E of the error in the approximation f(x,y)=L(x,y) over the rectangle R. f(x,y) = (1/2)x^2 + xy + (1/4)y^2 + 3x  3y + 4 at P_0(2,2),R:x2
asked by Jackie 
math 116
What would be the value of expressing something like the national debt in scientific notation? What information would be lost in such a usage? Is that important? Explain why or why not
asked by meka a 
chemistry
Express your answers as integers separated by commas.
asked by Anonymous 
Physics
The drawing shows a skateboarder moving at 5.40 m/s along a horizontal section of a track that is slanted upward by 48.9 ° above the horizontal at its end, which is 0.582 m above the ground. When she leaves the track, she follows the characteristic path
asked by Randy 
science
Name one similarity and one difference between pitch and loudness.
asked by Ms.Vargas 
Physics
A student, starting from rest, slides down a water slide. On the way down, a kinetic frictional force (a nonconservative force) acts on her. The student has a mass of 78 kg, and the height of the water slide is 12.5 m. If the kinetic frictional force does
asked by Randy 
Physics
In attempting to pass the puck to a teammate, a hockey player gives it an initial speed of 2.95 m/s. However, this speed is inadequate to compensate for the kinetic friction between the puck and the ice. As a result, the puck travels only onehalf the
asked by Randy 
Physics
A ball is dropped from a height of 5.67 m. If the ball rebounds with a speed of 4.22 m/s, what is the coefficient of restitution? a. .40 b. .74 c. .56 d. 1.23 I've ruled d out because it is greater than 1.
asked by Kaci 
math
a field trip will cost 7 dollars per student. write an expression to find the cost of the field trip for s students. what is the total cost if 26 students go on the trip?
asked by niza 
Physics
MultipleConcept Example 13 presents useful background for this problem. The cheetah is one of the fastest accelerating animals, for it can go from rest to 34.7 m/s in 3.03 s. If its mass is 102 kg, determine the average power developed by the cheetah
asked by Randy 
Chemistry
Consider the titration of 25.0mL of 0.10M HAc with 0.10M NaOH. That is, NaOH is added to HAc. (a)pH at the beginning of titration. (b)pH at the equivalence point of the titration. (c) pH at the midpoint of the titration.
asked by Layla 
Spanish 2 help please
Can someone check my answers? Provide the correct word (quién, quien, qué, que, como, cómo, cuánto, cuanto, cuántos, cuantos, cuando, dónde, donde) to fill in the blank for the following sentences: 1. Susana es de España __cuando____ está en
asked by alexus 
statistics
Suppose a random sample of 80 measurements is selected from a population with a mean of 65 and a variance of 300. Select the pair that is the mean and standard error of x.
asked by veronica 
Calculus
For what values of x does the graph of F9x) = 2x^3  3x^2 + 12x + 87 have a horizontal tangent?
asked by Amy 
Science
i need to unscramble a phrase about Plate Tectonics with these letters: rorpsfgnlsadeeasi
asked by Jalen 
Math
Mrs. Smith wanted to stimate the length of her porch so she would know how much paint to buy. Which would be the best benchmark for her to use? A. her fingertip B. a license plate C. a baseball bat D. how far she could walk in 20 minutes
asked by Anonymous 
science
find the theoreticval value of the period of a pendulum of length 0.9 meters located on the surface of the earth.
asked by princess 
Math
Anna wanted to measure the capacity of a large bucket. What unit of measure should she use? A. cups B. pounds C. inches D. gallons
asked by Anonymous 
Literature
Hi where can I find a free on line thing to check my writing ?
asked by Sam 
math
find the perimeter for 11in + 9 1/2in + 7in + 9 1/2in
asked by kareem 
Algebra
Power Standard Form 10^1 10 10^2 100 10^3 1000 10^4 10000 10^5 100000 Explain how the number of zeros in the standard form of a power of 10 relates to the exponent. Write a rule for the number pattern as well.
asked by Deanne 
trig
Four wires support a 40meter radio tower. Two wires are attached to the top and two wires are attached to the center of the tower. The wires are anchored to the ground 30meters from the base of the tower.
asked by Tina 
Algebra
How do I write an equation of a line that passes through the point (31,22) and is parallel to this equation: 16x + 13y= 210
asked by Beth 
math
How many btu's are absorbed when100 lbs of water is heated from 100f to200f
asked by kevin 
math
Beth makes a quilt that was 3 ft wide. Its perimiter was 16 ft. What was its area?
asked by Trent 
algebra
21/25 times 10/99 times 27/14
asked by Anonymous 
math
jan bought 17 stamps. andy bought 3 times as many stamps. how many stamps did andy buy
asked by Anonymous 
Algebra
How do I write an equation of a line that passes through the point (31,22) and is parallel to this equation: 16x + 13y= 210
asked by Beth 
Trig
Four wires support a 40meter radio tower. Two wires are attached to the top and two are attached to the center of the tower. The wires are anchored to the ground 30meters from the base of the tower. What is the total length of wire needed?
asked by Tina 
Algebra
If a temperature dropped from 44degrees to 56 degrees in a 24 hour period, how many degrees did the temperature drop during that time?
asked by Stephanie 
Science!! please help me could you write it to me
Name one similarity and one difference between pitch and loudness
asked by Ms.Vargas 
Maths
In a quadratic sequence.....Term 2 is 11,Term 4 is 7,term 7 is 64....determin the general term for the sequence
asked by Lucas 
SCIENCE URGENT HELP
what are the benefits of copper to the industry, economy, and society? what are all the organisms that are affected by copper? what is meant by the term Bioaccumulation? Include the names of any organisms that are affected and how they are affected by
asked by Louis 
trig
A population of wolves in a country 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. how many years will it take for the population of wolves to
asked by Anonymous 
Maths
(a) find d largest four digit number which has a total of exactly 3 factors. Assuming that one and the number itself are factors. (b) find a and b greater than zero such that a^2=b^3. (c) find. x and y such that x^3 + y^3 =1729
asked by Very urgent please 
Algebra
How do I write an equation of a line that passes through the point (28, 5) and is parallel to y= 5 45 X  _ __ 8. 2
asked by Beth 
Science
What is the momentum of a 50 kg carton that slides at 2 m/s across an icy surface? The sliding carton skids onto a rough surface and stops in 3 s. Calculate the force of friction it encounters.
asked by George 
Social Studies
Which of the following did not influence greek mythology? a. the kingdom of Minos b. knowledge of Egyptian mythology c. Roman culture d. Mycenae culture
asked by Johnny 
Physics
One component of a magnetic field has a magnitude of 0.0445 T and points along the +x axis, while the other component has a magnitude of 0.0725 T and points along the y axis. A particle carrying a charge of +1.01 × 105 C is moving along the +z axis at a
asked by Anonymous 
college algebra
given the function fx=x^3+x a) find the rate of change between the two stated values for x: 1 to 2 B)find the equation of a secant line containing the given points (1,f(1))and (2,f(2)
asked by zachary 
math
1. Mickey has the number of books that Minnie does. If they had 1 less book between them, they would have 27 books. The question, of course, is how many books each has.
asked by Anonymous 
World History (Ms. Sue)
What are the effects of abolitionism?
asked by Victoria 
Social Studies
The Oracle of Zeus was located in a.Delphi b.Samos c.Sparta d.Mount Olympus
asked by Johnny 
Physics
The radius of the earth is 6.37*10^6 m and its mass is 5.975*10^24 kg. Find the earth's average density to appropriate significant figure.
asked by Arif khan 
Physics
In the sport of skeleton a participant jumps onto a sled (known as a skeleton) and proceeds to slide down an icy track, belly down and head first. In the 2010 Winter Olympics, the track had sixteen turns and dropped 126 m in elevation from top to bottom.
asked by Bonny 
Math
24x^3y^2/42x^7y^6 please help i need to simplify i can only use positive intergers
asked by Alex 
CSU
what is the freezing point of 16.7g of LiCl in 136g of water, assuming complete dissociation for water kf= 1.86/mol
asked by Chloe 
Math
24x^3y^2/42x^7y^6 please help i need to simplify i can only use positive intergers
asked by Alex 
Math
24x^3y^2/42x^7y^6 please help i need to simplify i can only use positive intergers
asked by Alex 
Chemistry
what is the empirical formula for a compund with 26.2 g N, 7.5 g H, and 66.3 g Cl?
asked by Anonymous 
Chemistry
I have o.236 g for urea and 0.235g for NaCl. And the question is On a gram basis, which is more effective in depressing the freezing point, urea or NaCl? On a mole basis, which Is more effective? I am confused on what depressing the freezing point me and
asked by K 
math fractions
ADAM WANTS TO COMPARE THE FRACTIONS 3/12,1/6,AND1/3.HE WANTS TO ORDER THEM FROM LEAST TO GREATEST AND REWRITE THEM SO THEY ALL HAVE THE SAME DENOMINATOR?EXPLAIN HOW ADAM CAN REWRITE THE FRACTIONS?If anyone could helpme explain this to my 4 th grader.i am
asked by ttuuffyy 
Physics
The radius of the earth is 6.37*10^6 m and its mass is 5.975*10^24 kg. Find the earth's average density to appropriate significant figure.
asked by Arif khan 
science
why is viscosity such an important property of matter?
asked by Dave 
Lang. Arts
The line “Where water is not thirsty” is an example of which type of figurative language? A.symbol B.metaphor C.simile D.personification I think it is D...?
asked by Cassie 
science
You are standing stationary along the side of the railroad tracks. A toy cannon shoots a baseball at 9 m/s. The cannon is mounted facing forward on the handlebars of a bike. Your friend is riding the bike from the front toward the back of a train car at 5
asked by aly 
Math
At a certain time of day, a tree that is Xft tall cast a shadow that is X35 meters long if the distance from the top of the tree to the end of the shadow is X+5 meters, what is the height, X, of the tree?
asked by Alex 
Algebra 2..
a rule of thumb used by car dealers is that the trade in value of a car decreases by 20% of its value each year. suppose the initial value of your car is $23,500. write an equation expressing the trade in value of your car as a function of the number of
asked by Anonymous 
Lang. Arts
Read the following stanza from “Alone”: Lying, thinking Last night How to find my soul a home Where water is not thirsty And bread loaf is not stone I came up with one thing And I don’t believe I’m wrong That nobody, But nobody Can make it out here
asked by Cassie 
Algebra
Which of the following examples would show a negative trend? A.height and weight of students B.test scores and height of students C.outside temperature and heating bill D.none of these I think it is D....?
asked by Cassie 
math
After 7 spelling test Matthew scored 68, 81, 90, 95, 51, 83, and 85. If he wants his average to be 80, what does his next score need to be.
asked by alyson