Questions Asked on
December 16, 2010

Chemistry (URGENT)
In order to analyze the waste water containing Co^2+ from a manufacturing process, 1.0L of water was evaporated to 10.0mL, then placed in a spectrophotometer tube. The absorbance was found to be 0.20. Using your calibration curve, calculate the number of
asked by John 
college
what is the mass of solute dissolved in 50.0g of a 12.5% saline solution?
asked by debbie 
phsyics
A young girl sits at the edge of a dock by the bay, dipping her feet in the water. At the instant shown in the figure , she holds her lower leg stationary with her quadriceps muscle at an angle of 39 degree with respect to the horizontal. Use the
asked by Lisa 
AP Physics
A cowboy at a dude ranch fills a horse trough that is 1.7 m long, 50 cm wide, and 40 cm deep. He uses a 1.9 cm diameter hose from which water emerges at 1.3 m/s. How long does it take him to fill the trough? min
asked by Alex 
algebra
What is the value of x if 10 + 25x=5
asked by Tahaji 
helping abused children
the stubborn child law of 1646 by the state of massachusetts permits parents to do what
asked by anna 
chemistry
How much is the oxidation state of Cl2O3
asked by Vlera 
8th grade math
circle A has a raduis that is twice the length og the raduis of circle B. Which is an accurate statement about the relationship of these areas of circle A and B and y? a.the area of circle A is 4 times the area of circle B b. the area of circle A is twice
asked by Court 
math
Troy is building a pool that is proportional to the Olympicsized pool. The width of his pool will be 625 centimeters. find the scale factor troy will use to build his pool use the scale factor to show the length of troys pool if the length of the Olympica
asked by Court 
AP Calculus
a)Approximate root 26 by using the linearization of y= root x at the point (25,5) Show the computation that leads to your conclusion. b)Approximate cube root of 26 by using an appropriate linearization. Show the computation that leads to your conclusion.
asked by Jerry 
physics
a soccer ball is kicked into the air at an angle of 38 degrees above the horizontal. The initial velocity of the ball is 30.0m/s. How long was the ball in the air? Determine the horizontal distance traveled by the ball? what is the maximum height reached
asked by Anonymous 
Physics
A rock, which weighs 350 lb in air, weighs 226 lb when submerged in fresh water (62.4 lb/ft3). The volume of the rock is:
asked by Sammy 
Chemistry Kb question need to clarify something
the pKb for methylamine is 3.36, what is the Kb for methylamine? pKa+pKb= 14.00 Kb= 10^pKb = 4.4x10^4 is the answer but HOW?? what is punched into the calculator to get 4.4 x 10^4??
asked by Lori 
physics
a soccer ball is kicked into the air at an angle of 38 degrees above the horizontal. The initial velocity of the ball is 30.0m/s. How long was the ball in the air? Determine the horizontal distance traveled by the ball? what is the maximum height reached
asked by Anonymous 
MATH please help!
log 1/x + 3log2=log32
asked by jessica 
Calculus
A missile is rising vertically from a point on the ground 75,000 feet from a tracking station. The missile is rising at a rate of 16500 feet per minute at the instant when it is 38,000 feet high.What is the rate of change, in radians per minute, of the
asked by Mika 
Science
3 CaSO4 + 2 AlCl3 Al2(SO4)3 + 3 CaCl2 How many moles of aluminum chloride are required to produce 97.0 g of calcuim chloride in the above reaction?
asked by Catherine 
AP Physics
A rock, which weighs 350 lb in air, weighs 226 lb when submerged in fresh water (62.4 lb/ft3). The volume of the rock is:
asked by Tony 
BIOLOGY!
In order to keep veggies crisp, grocery stores use coold water or ice. Which would keep veggies crisper, tap water or distilled water? Explain. I have no idea...
asked by Anonymous 
math
how many factors are in the multiplication sentence: 9 x 4 = 36?
asked by shy 
physics
A cannon mounted on a pirate ship fires a cannonball at 125 m/s horizontally, at a height of 17.5 m 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 tammy mikols 
math
the perimeter of the rectangular shaped base of a piano is 16 feet. what are all the possible dimensions of the piano using only whole numbers?
asked by alaysia jones 
Physics
An airtight box, having a lid of area 12 in2, is partially evacuated. Atmospheric pressure is 15 lb/in2. A force of 108 lb is required to pull the lid off the box. The pressure in the box was:
asked by Ken 
high school
The earth exerts a force of 1400 N on an orbiting communications satellite that is 35 mi above the Earth. What is the magnitude of the force the satellite will exert on the earth? Answer in units of N.
asked by Sangita 
physics
a soccer ball is kicked into the air at an angle of 38 degrees above the horizontal. The initial velocity of the ball is 30.0m/s. How long was the ball in the air? Determine the horizontal distance traveled by the ball? what is the maximum height reached
asked by Anonymous 
Physics
A 44.0 kgseal at an amusement park slides from rest down a ramp into the pool below. The top of the ramp is 1.75 m higher than the surface of the water and the ramp is inclined at an angle of 35. degrees above the horizontal. If the seal reaches the water
asked by Lisa 
11th grade
A reflecting telescope contains a mirror shaped like a paraboloid of revolution. If the mirror is 4 inches across at its opening and is 3 inches deep, where will the collected light be concentrated?
asked by katie 
Physics
A rock, which weighs 350 lb in air, weighs 226 lb when submerged in fresh water (62.4 lb/ft3). The volume of the rock is:
asked by Ken 
11th grade
A thunderstorm has an electric field one night of 1.5 105 N/C. What is the magnitude of the electric force on an electron in such a field?
asked by jesse 
Physics
Water (density = 1.0 × 103 kg/m3) flows through a horizontal tapered pipe. At the wide end its speed is 4.0m/s and at the narrow end it is 5.0 m/s. The difference is pressure between the two ends is:
asked by Sammy 
CHEMSIRTY
How much energy would it take to warm 30.0 g of water at 35 oC to the boiling point and boil all the liquid away?
asked by Miranda 
business research
a. Employee job satisfaction (high, normal, low) and employee success (02 promotions, 35 promotions, 5+ promotions) are to be studied in three different departments of a company. b. Consumers making a brand choice decision between three brands of coffee
asked by CL 
Calculus AB
A police car is chasing a suspect. The policemen is at point y=0.6 (north of an intersection) and the suspect is at point x=0.8 (east of the intersection). The police car is traveling at 60mph. Their radar gun reads that the suspect's car is getting away
asked by Matt 
algebra
six people are going to be seated in a row of 8 chairs. how many different ways may they be seated?
asked by tyler 
Science
Describe the method you would use to separate eachg mixture. Methods: Picking apart, filtering, using density, using magnetism, dissolving, evaporating. a)sand and water b)oil and water c salt and pepper d)sand and pebbles e)sugar and water 2. List several
asked by Saquta 
US History
The passage is an excerpt from President Bill Clinton’s State of the Union address in January 1998. . . . As we enter the twentyfirst century, the global economy requires us to seek opportunity not just at home, but in all markets of the world. We must
asked by anonymous 
Math
A nanometer is a unit equal to 0.000000001 meter. Write a expression to represents this number is scientific notation
asked by Lisa 
writing in math
I need help writing a multiplication story with the factors 2 and 5.
asked by shy 
math
rudy went to the mall to spend some of his money he earned. he spent 1/3 of his money o n a new shirt. He then went to to the music store and bought a cd with 1/3 he had left. At dvds to go he bought a dvd with 1/3 of the money he had left. He stopped once
asked by lisa 
phsyics
A 8.0×10−2{\rm kg} toy airplane is tied to the ceiling with a string. When the airplane's motor is started, it moves with a constant speed of 1.30 m/s in a horizontal circle of radius 0.41 m, Find the angle the string makes with the vertical.
asked by Lisa 
algebra
Six people are going to be seated in a row of 8 chairs. How many different ways may they be seated?
asked by mw 
algebra
Solve by the linear combination method (with or without multiplication). 4g + 5h = 4 8g – 10h = 4
asked by geddy 
chem/plz/check work studying for a final
what is the volume occupied by 16.0g ethane gas (C2H6) at 720 Torr and 18C? V=nRT/P conversion of mol: 16.0g C2H6 X 1mol C2H6/30.07g C2H6= .53mol C2H6 V= .53 mol(0.0821 L*atm/mol*K)(291)K / 720 Torr (1 atm/760Torr) V= 13.5 L
asked by julia 
Stats
Use this table to answer the questions. Height (in inches) Frequency 5052 5 5355 8 5658 12 5961 13 6264 11 1. Identify the class width. 2. Identify the midpoint of the first class. 3. Identify the class boundaries of the first class. 4. Give the
asked by Todd 
helping abused children
what happens in most cases of sexual abuse athe abuser is removed immediatley from the home bthe abuser is prosecuted in court cnothing can be done until evidence is found dthe abuser receive institutuional counseling as a precautionary measure
asked by anna 
Math
segment yw is perpendicular to segment xz. the perimeter of triangle xyz is 71 meters. what is the length of segment wz
asked by Lexi 
physics
An electron starts at rest. Gravity accelerates the electron in the negative y direction at 9.80 m/s2 while an electric field accelerates it in the positive x direction at 3.80×106 m/s2. Find its velocity 2.45 s after it starts to move.
asked by tammy mikols 
algebra
Solve by the linear combination method (with or without multiplication). x + y = 50 0.05x + 0.06y = 2.8
asked by geddy 
Physics
A constriction in a pipe reduces its diameter from 4.0 cm to 2.0 cm. Where the pipe is wide The fluid velocity is 8.0m/s. Where it is narrow the fluid velocity is:
asked by Sammy 
Physics
The angular speed of an automobile engine is increased at a constant rate from 1200rev/min to 3000rev/min in 12s. How many revolutions does the engine make in this 12s interval? I worked it out to be 25200 rev. Is that right?
asked by MT 
chem/plz/check work studying for a final
what is the volume occupied by 16.0g ethane gas (C2H6) at 720 Torr and 18C? V=nRT/P conversion of mol: 16.0g C2H6 X 1mol C2H6/30.07g C2H6= .53mol C2H6 V= .53 mol(0.0821 L*atm/mol*K)(291)K / 720 Torr (1 atm/760Torr) V= 13.5 L
asked by julia 
algebra
Solve by the linear combination method (with or without multiplication). 3x5y = 7 2x + 3y = 30
asked by geddy 
chemistry
how many grams of water can be formed when 28.7 grams of CH4 reacts with 45.8 grams of O2
asked by mickey 
chemistry
suppose you have an unknown gas, and wish to determine whether it may be ammonia, hydrogen or carbon dioxide. Describe tests you might use to prove the existence of each of these gases.
asked by jake 
math
to identical jars are filled with equal amount of marbles. the marbles are coloured red or white. the ratio of red to white marblesis 7:1 in jar 1 and 9:1 in jar 2 if there are 90 marbles altogether, determin the number of red marbles in jar 2.
asked by Gorege 
Statistics and Probability
One sixsided fair die is rolled, and one twosided fair coin is tossed. If the coin turns up heads, then the number of spots showing on the die is the value (score) for that trial. If the coin is tails then twice the number of spots showing on the die is
asked by Laura 
Physics
I have ten problems left on my homework that I need help with. My instructor gives us the answer and we have to write down the steps. So if anyone could help me I would really appreciate it. 1 A steel wire, 150 m long at 10°C, has a coefficient of linear
asked by Jesse 
us history
which type of government has the power to make marriage and divorce laws? the power to declare home rule belongs to with type of government? who has the power to relate educatoin? who has the power of local government that is not shared with the state
asked by ? 
spanish
Que tienes que comprar para el cumpleanos de una pariente?
asked by Morgan 
geometry
Triangle ABC has the following angle measures. Angle A = 44. Angle B = 4x. Angle C = 2x + 16. Find the measure of angle C.
asked by jess 
chemistry
how many grams of water can be formed when 28.7 grams of CH4 reacts with 45.8 grams of O2
asked by mickey 
Intermediate Algebra
in 1920 the record for a certain race was 45.7 seconds. In 1930, it was 45.4 seconds. Let R(t)= the record in the race and t = the number of years since 1920. Find the linear function that fits the data.R(t)=__ (round to nearest hundreth. What is the
asked by Vienna 
us history
when did the siminole wars begin.who was the simenole leader who led his tribe in order to keep siminole lands and homes in florida.what florida county did the siminoles fight the ameracen colinist over or tell me what the answers are in florida studies
asked by daniel 4th grade 
Science
I have been waiting for 30 minutes and noone has answered this question. Please help me! Describe the method you would use to separate eachg mixture. Methods: Picking apart, filtering, using density, using magnetism, dissolving, evaporating. a)sand and
asked by Saquta 
physics
A vertical spring with constant 830 N/m has a ball of mass 3 kg attached to the bottom of it, which is held with the spring unstretched. (a) How far must the ball be lowered to reach its equilibrium position? (b) The ball is given a charge of 0.060 C. If
asked by Jessica 
Physics
One cm of a 10cmlong rod is made of metal, and the rest is wood. The metal has a density of 5000 kg/m3 and the wood has a density of 500 kg/m3. When the rod is set into pure water, the metal part points downward. How much of the rod is underwater?
asked by Sara 
physics
A 4000 kg truck traveling at constant velocity and a braking force of 20000 N is suddenly applied. It takes 6 seconds for the truck to stop. a) what is the deceleration of the truck? b) what is the velocity of the truck before the brakes were applied c)
asked by jldrew 
marketing
) According to the text, marketing means:
asked by Anonymous 
physics
In hitting a stationary pool ball with the mass of 170 g, a billiards player gives the ball impulse of 6.0 Ns. At what speed will the pool ball move toward the hole?
asked by Robert 
7th math
At the mall, you spent a total of $170.86. You bought 2 pairs of jeans for $ 39.95 each,a jacket for $45.99, and shirts for 14.99each. How many shirts did you buy
asked by Daniel 
7th Grade MathExponents
I don't understand this at all! Please help! Find the units digit for 7^197 without using a calculator. Explain how you found your answer.
asked by Amber 
Physics
A hill is 290 m long and makes an angle of 10 degrees with the horizontal. As a 68 kg jogger runs up the hill, how much work does gravity do on the jogger?
asked by Casey 
Ap Physics
a 70 kg object sits without sliding on a horizontal platform that rotates at a constant rate of one revolution every 6 seconds about a fixed vertical axis. The object moves on a circle of radius r=2m. If meu is now .4 what is the max distance from the
asked by Emily Gutenber 
math
Find the range of possible measures if each set of expressions represents measures of the sides of a triangle:x 2x+10, x+8
asked by bob 
science
how much energy is required to obtain superheated steam at 115 degrees celcius from 25 grams of water at 10 degrees celcius?
asked by Tyler 
Math
write the converse and contrapositive for the conditional statement below. decide whether each of the three statements is true or false. provide a counterexample for any false statement. If n is a prime number, then n+1 is an even number
asked by bobby 
algebra
two runners jog around an oval path at constant rates, but in opposite direstions. one runner completes a lap every 10 minutes, and the other does a lap every 12 minutes. how many minutes elapse between consecutive meetings of the runners? express answer
asked by Tom 
Calculus
A particle is moving around the unit circle radius = 1, at .6,.8 the horizontal velocity sx/st=3, what is vertical velocity dy/dt at that point?
asked by J. 
Fine Art
9. Features including easily understood symbols, illumination, and colorful shapes are common in a. paintings from the Gothic period b. paintings from the Romanesque period c. Islamic art d. paintings done by monks A 17. Because of the style of some
asked by mysterychicken 
calculus
Find the volume of the solid whose base of a solid is the region bounded bythegraphsofy=3x,y=6,andx=0. Thecross␣sections perpendicular to the x ␣ axis are rectangles of perimeter 20.
asked by Ashley 
physics
A person in an elevator is holding a 13 kg block by a cord rated to withstand a tension of 226 N. When the elevator starts up, the cord breaks. What was the minimum acceleration of the elevator?
asked by Georgia 
English
1. Our school play club will put on a play Nasrredin and the Fish. 2. Our school play club will perform a play Nasrredin and the Fish. 3. Our school play club will resent a play Nasrredin and the Fish. (Are they the same? Does 'put on' mean 'perform? Why
asked by rfvv 
trig
prove the identity: csc x1/csc x+1 = cot^x/csc^x+2 csc x+1
asked by shela 
algebra
Solve by the linear combination method (with or without multiplication). 6x \2y = 2 3x + 4y =5
asked by geddy 
physics
an electron is moving in a circular path of radius 1500 m perpendicular to a 2000 T magnetic fieldWhat is the tangential velocity of the electron?
asked by twan 
7th grade
what is the volume of a cylinder of a diameter 10cm and a height of 10cm
asked by Anonymous 
chem/plz/check work studying for a final
A 20.5 lb cast iron boat anchor displaces 1.33 qt of water when submerged. What is the density of the cast iron, in g/cm3? 1L=1.057 qt 1kg=2.205lb 1lb=453.6g 20.5lb X 453.6g/ 1lb = 9298.9g 1.33qt X 1L/1.057qt = 1.26L 1.26L X 1000cm3/1L = 1260cm3
asked by julia 
11th grade
Calculate the minimum change in velocity (delta V or ∆V) required for the Space Shuttle to decrease its altitude to 60 miles if it’s orbiting with an apogee of 236 miles and a perigee of 215 miles above the surface of Earth. Use the rule of thumb that
asked by Vanessa 
Calculus
Find the slopepredictor formula and write an equation for the line tangent to (a, f(a)) for f(x) = x2  6x + 4. Make sure you detail the process.
asked by Brian Meredith 
math
Given the linear equation y=3/2x+1, find the ycoordinates of the points (4), (2), and (6). Please show all of your work. Plot those points and graph the linear equation.
asked by Allie 
Math
Simplify each expression. You may use the properties to help. When you type your answer, do not space between numbers and symbols. (4a)(5b)(6c)?
asked by Andrew 
Math7th grade
Im having trouble solving the amount per day... The table below shows the relationship between d, the number of days a DVD is returned late to a video rental store, and f, the amount of the late fee. Write an algebraic expression that describes this
asked by Amber 
7th grade
There were 31 students who completed a survey. There were 13 boys and 18 girls. One survey was picked at random. To the nearest hundredth, what is the probability it was completed by a girl?
asked by Anonymous 
Physics
An airtight box, having a lid of area 12 in2, is partially evacuated. Atmospheric pressure is 15 lb/in2. A force of 108 lb is required to pull the lid off the box. The pressure in the box was:
asked by Sammy 
physics
A person in an elevator is holding a 13 kg block by a cord rated to withstand a tension of 226 N. When the elevator starts up, the cord breaks. What was the minimum acceleration of the elevator?
asked by Georgia 
8th grade math
Every year on the first day of Christmas my true love gives me one gift, a partridge in a pear tree. On the second day of Christmas my true love gives me a total of three gifts, two turtle doves and a partridge in a pear tree. This will go on until the
asked by Anonymous 
algebra 1
In a triangle ABC,angle b is 4 times angle "A" and angle "C" IS 17 less than 5 times angle "A". Find the size of the angles.
asked by esther 
chemistry
a given volume of a gas is at a temperature of zero degrees celsius. to what temperature must it be heated in order to double its volume and pressure?
asked by danny boan 
Chemistry
If a student starts with 615g of Co(NO3)2 and obtains a 57.3% yield of CoS, what mass of CoS is isolated? Co(NO3)2 + K2S > CoS + 2KNO3
asked by Brittany 
Physics
An isolated 3 kg object is moving in the positive y direction along the y axis at 2 m/s; when it reaches the origin it breaks into two pieces sending a 1 kg fragment in the +y direction at a speed of 3.7 m/s. what are the velocity and direction of the
asked by Sophie 
english
I need help ASAP on this im writting a 6 paragraph essay and its due tomorrow i cant even think of a thesis its "Discuss the irony as its used in Animal Farm Be sure to give specific details from the novel." I need help ASSSSAAPP! I didn't realize before
asked by Javay 
physics
The student undergoes a second displacement of 5.0 meters at an angle of 45 degrees SOUTH of EAST. The x component, (EAST WEST) of the total displacement is_
asked by Anonymous 
algebra
Two runners jog around an oval path at constant rates, but in opposite directions. One runner completes a lap every 10 minutes, and the other does a lap every 12 minutes. how many minutes elapse between consecutive meetings of the runners? Express your
asked by mw 
English
Posted by rfvv on Thursday, December 16, 2010 at 3:21am. {At a restaursant} For hear or to go? Is this for here or to go? It's for here, please. It is to go, please. (Are the expressions above all grammatical? What is the meaning of 'is to' in 'It is to
asked by rfvv 
english: greek mythology
In the story Prometheus (he steals fire and gives it to humans), What human qualities do Prometheus and Zeus have? What is the significance of these gods having human qualities? please just point out a few qualities for each and some quotes that show
asked by Rose 
algebra
write the product of 35/14 x 3/125 in scientific notation
asked by ty 
8th grade algebra
write a function to describe each statment buying apples for $.89 a lb
asked by haywood 
Fine Art
9. Features including easily understood symbols, illumination, and colorful shapes are common in a. paintings from the Gothic period b. paintings from the Romanesque period c. Islamic art d. paintings done by monks A 17. Because of the style of some
asked by mysterychicken 
Math
The distance from the center of the Ferrus wheel to a passenger car is 328 feet. What is the approximate distance a passenger travels in 3 full rotations during the ride?
asked by Alyson 
chemistry
The combustion of 38.5g of C2H6 with excess oxygen. Find the equation, balance equation and find the mass of each product
asked by hbluefrost 
calculus
Find the second derivative of the function: y=e^2t*cos^2(t+(pi/4))
asked by ireallyneedhelp 
Calculus AB
Evaluate the following derivatives at the given points. Find the equation of the line tangent at each point. a) f(x)=ln(secx) @ x=pi/3 b) f(x)=(root(x+1))/(x1) @ x=0
asked by ireallyneedhelp 
math
what is 7 16th plus 3 8th please help me i am hopeless
asked by leah 
algebra
Solve by the linear combination method (with or without multiplication). 4x5y =18 3x + 2y =2
asked by geddy 
Statistics
An adverting firm wishes to demonstrate to its clients the effectiveness of the advertising campaigns it has conducted. Using x as cost in millions of dollars: 3.5o, 3.05, 3.64, 1.59, 3.21, 2.12, 2.07, 3.99,1.58, 3.01, 1.36, 2.24; y for increases in sales:
asked by Angel MW 
Physics
a 60 kg person falls off a 15 kg sled moving at 2 m/s. The person doesn't move after falling. Assuming no friction with the ice, and not other net forces acting on the sled, what is the change in velocity of the sled after the person falls off.
asked by Sophie 
9th grade science
where are the cell and plasma membranes located
asked by Miranda 
chem
100 grams of sodium phosphate contains how many sodium ions? what is the formula?
asked by shane 
math
a principle of $16,000 is invested at 8% and earns $8,320. simple interest. How long has the money been invested
asked by Anonymous 
physics
The student undergoes a second displacement of 5.0 meters at an angle of 45 degrees SOUTH of EAST. The x component, (EAST WEST) of the total displacement is_
asked by mohamed mokhbat 
business
use five verbs and five adjectives write a 150300 word review of a movie,sporting,event
asked by marquita 
Chemistry
If one were to mix 200.0 mL of an HCl solution that had a pH of 3.00 with 200.0 mL of an NaOH solution that had a pH of 10.00, what would be the pH of the final solution? Can you show me the steps please so that I can apply to questions that ask for the
asked by Anonymous 
Algebra 1
p/7>9 What is p? For solving inequalities.
asked by Lauren 
biology
explain why salt can be used as a weed killer.
asked by Anonymous 
Math
a person cleared a rectangular plot of land and covered it with gravel. then he got 9 square wooden sections of side lengths: 2,5,7,9,16,25,33 and 36. by placing the squares on the gravel with no two overlaping, the person built a patio which exactly
asked by Jimmy 
algebra
Write the product of 35/14 x 3/125 in scientific notation.
asked by ty 
Math
prove that the difference of squares of any two odd numbers is divisible by 4. (first list at least 3 examples to support this statement.)
asked by Henry 
geometry
a wheelchair ramp has an angle of 4.5,what is the horizontal distance needed to have a vertical rise of 1 foot?
asked by Chloe' 
English
Here are some more sentences I need you to check. 1) Translate the following verbs then write the past simple and the past participle of each verb. 2) Write four questions each including a verb mentioned above. 3) Witches were suspected of casting spells
asked by Franco 
5th grade
what is the magnitude estimate for 78.6 divided by 6
asked by matt 
math
when will the line .5(x)87 and .4(x)34.8 meet on a graph
asked by karlyn 
chemistry
a certain volume of a gas at 125K was heated such that its volume and pressure became four times their original values. what is the new temperature of the gas?
asked by danny boan 
Calculus AB
Find the equation of the line tangent to the curve at t=pi/3: a) x=tsin(t) b) y=1cos(t)
asked by ireallyneedhelp 
calculus
Use implicit differentiation to find dy/dx: a) xrootyye^x=1 b) sinxy + ln y=x
asked by ireallyneedhelp 
AP Calculus
A line is perpendicular to 2x+y7=0 and passes through (4,6). Find the y coordinate of the point where x=8
asked by bri 
Science
My answers are at the bottom. Describe the method you would use to separate eachg mixture. Methods: Picking apart, filtering, using density, using magnetism, dissolving, evaporating. a)sand and water b)oil and water c salt and pepper d)sand and pebbles
asked by Saquta 
Math
Elanor wants to purchase two art posters. One poster costs $4.85 and the other poster costs $15.00. There is sale at the store for 20% off each item, and there is 5% sales tax. Find the approximate amount that she has to pay for the two posters
asked by PHelp 
calculus
find deriviative using definition lim x heads toward a of f(x)f(a)/ (xa) of x^5
asked by Anonymous 
Calculus
Find dy/dx, y= 7e^6x+11 + xe^x
asked by Hannah 
geometry
Given: ÚA≅ÚBDE; AB x DE = AD x BD Prove: AB x CD = AD x BC
asked by kristie 
World History
Can you summarize and answer these: •a brief definition of the Second Industrial Revolution •a description of urban life and the problems created by industrialization •measures workers took to improve conditions •technological innovations that
asked by Joan 
chem/plz/check work studying for a final
23. A 32.3 L sample of a gas at 305oC and 1.20 atm is to be cooled at constant pressure until its volume becomes 28.4L. What will be the new gas temperature? Tf = Vf*Ti/Vi Tf =28.4L x (305+273)K / 32.3L = (28.4)(578)K / 32.3 = 16415.2/32.3 Tf = 508K I got
asked by julia 
trig
triangle has sides 200,172 and155 find area
asked by john 
4th grade
how many 8 ounce servings can be created from a six pack of 12 ounce fruit drinks
asked by dk 
free enter
true or false the assembly line uses a division of labor
asked by tyler 
Health
what negative physical problems is specifically associated with how heroin is taken?
asked by Betty 
Healthcare
What current issues affect positive communication in health care organizations today?
asked by DeeDee 
algebra
How many cubic feet are inthe volume of a round swimming pool which is 16 feet in diameter and 4 feet deep throughout? Express your answer in tterms of pi.
asked by mw 
English
I just need to know if the sentences are possible (especially the ones in parentheses). I'm sending you the first five. 1)During the Middle Ages witchcraft was regarded as an offence against the State. Henry VIII imposed the death sentence for witchcraft.
asked by Franco 
math
how do i know if the points of the boundary line of a graph are on the boundary line or if they are below it?
asked by william clemons 
World History
I'm comparing three different authors views on why the "rise of the west" occured in the 19th century. i have to compare ander gunder frank's "reorient", kenneth pomeranz' "the great divergence" and jack goldstone's "Why Europe? the rise of the west in
asked by Nicole 
chemistry
What is the pH of a solution prepared to contain 155 grams of HCl in 200.0 mL? Can you tell me how to do it? I can't remember how...
asked by Claudia 
Math
suppose you inves $8000 and the value grows to $12000 in 10 years. What yearly interest did you earn assuming that interest is coumpounding continuously?
asked by Jeri 
poetry/song
My group member and i changed some lyrics with this christmas song so it relates to something about gov. Congress, You better watch out, You better not cry, You bettre not pout, We're telling you why The veto is coming to town He's reviewing your bill and
asked by Song for AP Government 
Math
A truck tire travels about 11 feets in 1 full rotation. What is the diameter of the wheel, to the nearest inch?
asked by Help 
Math
convert 12.44 as a percent and as a fraction
asked by Anonymous 
Math
The glass in a frame has an area of 91 m sqaurd. If the window length is 14 m, what is the window height?
asked by Lisa 
English
{At a restaursant} For hear or to go? Is this for here or to go? It's for here, please. It is to go, please. (Are the expressions above all grammatical? What is the meaning of 'is to' in 'It is to go, please.'? Does it mean 'must'? That is, "It (the food)
asked by rfvv 
polymer science
how the strength polymer need for polymer electrolyte prepatation
asked by pradee 
Calculus AB
Calculate dy/dx at the point t=10 for the equations: a) x=5t b) (t^2)1
asked by ireallyneedhelp 
Math
A measuring cup can hold 2 cups of water. There are 1 1/8 cups of water in it now. How much more water can it hold?
asked by DeeBee 
Communications
Techniques for Creating Behavior Change in a Staff Member
asked by tina 
History Help Please!!!
i'm writing a paper on the Bolivarian Alternative for the Nations of Our America and I need to tie in a leaked U.S. document that referred to particular countries called the "Axis of Mischief." I can't find one, could you please help??
asked by brett 
Math
Trail Mix and Number of people A  27 people B 33 people Write a proportion that can be used to predict the number of people x who would choose Mix A out of 300 people
asked by PHelp 
math 116
Simplify. 2[38(5650)]=
asked by sue 
Chemistry URGENT
If a student starts with 615g of Co(NO3)2 and obtains a 57.3% yield of CoS, what mass of CoS is isolated? Co(NO3)2 + K2S > CoS + 2KNO
asked by Brittany 
Math
make a conjecture (obsevations based on patterns) for each sequence below. a)7,10,13,16 b)4,44,444,4444,44444 c)2,10,50,250 d)1,2,6,42,1806,3263442
asked by Kale 
algebra
how many cubic feet are in the volume of a round swimming pool which is 16 feet in diameter and 4 feet deep throughout? express answer in terms of pi.
asked by tyler 
algebra
Compute: 7!/6! x 3!2!/(81)! express answer as acommon fraction.
asked by tyler 
physics
The force acts on a 1.2kg object at 120m/s. The direction of the force is aligned with the velocity. What is the new velocity of the object
asked by Sarah 
math
If the average of 11 numbers are 20 and the average of 3 numbers are 48, what is the average of all the numbers.(
asked by Anonymous 
Business math
21,000*5%*1 and three fourths of a year
asked by Charlene 
10th grade
I need help ASAP on this im writting a 6 paragraph essay and its due tomorrow i cant even think of a thesis its "Discuss the irony as its used in Animal Farm Be sure to give specific details from the novel." I need help ASSSSAAPP!
asked by Javay 
physics
as an object is dropped from a high cliff, which of the following statistics can be made in regard to the objects potential energy?
asked by katie 
physics
A rock is dropped. How fast will the 5.0 kg rock be traveling in 4.0s if a 5.o N force of air resistance acts on it?
asked by Nate 
Math
prove that two triangles are congruent if they have 2 equal adjacent angles and the side inbetween them is also the same.
asked by bob 
Healthcare
What current issues affect positive communication in health care organizations today?
asked by DeeDee 
language arts
a 10 to 15 line pome about a mom
asked by chy 
adult education
use lattice multiplication to find the prduct of 124 x 56
asked by molly 
pre calculus
Write the trigonometric expression in terms of sine and cosine, and then simplify. cot(x)/csc(x)sin(x)
asked by chris 
Math117
Is this equation correct: (x y)3 = x y3 ? Explain why. If it is correct, how can you prove this? If it is incorrect, what should be done to make it right?
asked by Sherine 
us history
when did the siminole wars begin.who was the simenole leader who led his tribe in order to keep siminole lands and homes in florida.what florida county did the siminoles fight the ameracen colinist over
asked by daniel 4th grade 
medical
an objective sign is one that 1. can be observed by another person. 2. precedes a disease 3. is felt by the patient and can't be observed by another person 4. causes the patient the most trouble
asked by Angela 
calculus
Find the volume of the solid whose base of a solid is the region bounded bythegraphsofy=3x,y=6,andx=0. Thecross␣sections perpendicular to the x ␣ axis are rectangles of perimeter 20.
asked by Ashley 
Math
I am a square number divided. I am an odd number. I appear more than once in the table. What dividend am I?
asked by Bernadette 
algebra 1
In a triangle ABC,angle b is 4 times angle "A" and angle "C" IS 17 less than 5 times angle "A". Find the size of the angles.
asked by esther 
History
Writing of grito de Dolores and petition of the first continental congress?
asked by Jim 
English
1. We need to prepare food inorder to take a party. 2. We need to prepare food inorder to have a party. 3. We need to prepare food inorder to throw a party. (Are they all grammatical? Would you take a look at the verbs?)
asked by rfvv 
Math
A pizza parlor has 2 1/2 pizzas left. Each pizza originally has 8 slices. How many slices are left?
asked by Lisa 
Math
The equation Ax^2 + 4y^2 = 16 represents an ellipse. Find all values of A such that its intersection with y = x has coordinates (x,y) which are integers.
asked by Andy 
Science
What are some filters in your home? What's the purpose of each filter?
asked by Pratigya 
physics
A hard ball dropped from a height of 1 m in earth’s gravitational field bounces to a height of 95 cm. What will be the total distance traversed by the ball?
asked by haresh 
Health Care
I need help with a team powerpoint on Health Care Costs and need to do 34 slides with speaker notes on Recommendations for Improvement
asked by Donna 
History Help Please!!!
Ms. Sue, I don't think that is what he wants. He seems to be asking for a particular document.
asked by Brett 
History help
Can you summarize and answer these: •a brief definition of the Second Industrial Revolution •a description of urban life and the problems created by industrialization •measures workers took to improve conditions •technological innovations that
asked by Joan 
social studies
the blank blank shows the main directions, which are called the blank directions.
asked by kaylyn 
Algebra/functions
PLEASE HELP. I wanted to put effort into this problem just need confirmation. F(x) = 2 x^2  2x; F(0) = 0 F (1)= 6 F(2) = 4 Thank you
asked by Amy 
Chemistry!!
How many moles of Mg are there in 4.00 L of a 0.500 M solution of MgCl2?
asked by margrav2 
Math
complete the pattern 3 8 13 18 23 what three numbers come next?
asked by Tiffany 
English
I need help writting a thesis statement
asked by Javay 
Math
5^1=5 5^2=25 5^3=125 using patterns determine the last 3 digits of 5^100
asked by Blake 
Math
start with the word RODE. change one letter at a time to form a new until u have the word FILM. the best solution has the fewest steps.
asked by walter 
high school
From the reading and video Jurgis truly believed in the American Dream: What was the American Dream? How did the Meat Packing Industry and Jurgis's experiences destroy that myth?
asked by The Jungle by Upton SInclair 
English
Can you please chech the following sentences for me? Thank you very much. 1)During the Middle Ages witchcraft was regarded as an offence against the State. Henry VIII imposed the death sentence for witchcraft. (Rephrase: Henry VIII had witches sentenced to
asked by Franco 
SCIENCE
WHAT IS THE WEIGHT OF THE HUMAN BRAIN IN GRAMS?
asked by ANTONIO 
Healthcare
What current issues affect positive communication in health care organizations today?
asked by DeeDee 
social studies
when did the siminole wars begin.who was the simenole leader who led his tribe in order to keep siminole lands and homes in florida.what florida county did the siminoles fight the ameracen colinist over
asked by Anonymous 
calculus
how is the lim as x heads towards infinity of 3/(1+(3/x) equal to 3?
asked by Anonymous 
8th grade
how do i know if all of the points are on the boundary line or they are all below it?
asked by william clemons 
independent high school
4x5
asked by nerrisa 
statistics probablity
Each time that Ed Charges an expense to his credit card, he omits the cents and records only the dollar value. If this month he has charged his credit card 20 times what can be said about the probability that the record shows at least $15 less than the
asked by Joe 
11th grade math
Using the formula 4.9t^2... A object is dropped how long will it take it to fall 92 meters
asked by ALI 
Spanish
for the verbs ending in car, gar, zar i thought you only change the "yo" form but i learned that for conjugar becomes conjuguen. would that be in the present and not preterite?
asked by Amy 
science
scientific name of flower lotus?
asked by Dev 
math
Jim divied 2 by an integer and his result was between 1 and 0 Which integur could have been the divisor
asked by Anna 
Chemistry!! Please Help
How many grams of chloride are present in 1.00 liter of a 1.5 M solution of CaCl2?
asked by margrav2 
4th grade
ms plants wants to place a fence around a garden that measures 12 feet by 20 feet. how much fencing does she need for the perimeter of the garden.
asked by dk 
math
find the slope and yintercept of the line in the given equation: y=6/7x4
asked by Allie 
Algebra 1
5n8 is < or = to 2n+10 What is n?
asked by Lauren 
SCIENCE
NUMBER OF CHAMBERS IN THE HUMAN HEART?
asked by ANTONIO 
Algebra 1
y
asked by Lauren 
Social Studies ASAP!!!
Where can I find letters about soliders in the American Revolution (Solider Writing about his life in the REevolution)
asked by Sumaiya 
History Seperation of Quebec
What would happen to all the members of parliament from Quebec if they separated? Would the prime minister be the leader of canada even though they don't hold a seat in the house of common?
asked by Anonymous