Questions Asked on
March 3, 2011

chemistry
Iron(II) can be oxidized by an acidic K2Cr2O7 solution according to the net ionic equation. Cr2O72− + 6 Fe2+ + 14 H+ 2 Cr3+ + 6 Fe3+ + 7 H2O If it takes 44.0 mL of 0.0250 M K2Cr2O7 to titrate 25.0 mL of a solution containing Fe2+, what is the molar
asked by Robert 
precalculus
Twenty percent of a radioactive substance decays in ten years. By what percent does the substance decay each year?
asked by katrina 
math
why is it good to have holes in your tshirts?
asked by yes 
Physic
Three balls are attached to a light rigid rod, as shown in the figure. A fulcrum is located at xf = 18.0 cm measured from the left end of the rod. Ball A has mass mA = 65 g and is located at xA = 3 cm. Ball B has mass mB = 12 g located at xB = 22 cm. Ball
asked by panda 
physics
a simple pendulum consists of a bob of mass 1.8 kg attached to a string of length 2.3 m. the pendulum is held at an angle of 30 from the vertical by a light horizontal string attached to a wall, as shown above. calculate the tension in the horizontal
asked by laura 
Chemistry
If i titrated 25.0mL of 0.500M HCl with 0.500M NaOH and then 25.0mL of 0.500M of an unknown weak acid HA with 0.500M NaOH. How would the two titration curves compare at 10 or 15mL of NaOH Beyond equivelance pts? I think that they will be the ssame or
asked by Jake 
Physics
A mechanic jacks up the front of a car to an angle of 6.2° with the horizontal in order to change the front tires. The car is 2.91 m long and has a mass of 1100 kg. Gravitational force acts at the center of mass, which is located 1.02 m from the front
asked by Mike 
m ath
Compute f '(a) algebraically for the given value of a. HINT [See Example 1.] f(x) = −6x − x2; a = 4
asked by la 
math..urgent pleasehelp :(
the purchasing power (in dollars) of an annual amount of A dollars after t years of 5% inflation decays according to P= Ae^0.05t a) how long will it be before a pension of $60,000 per year has a purchasing power of $30,000 b) how much pension A would be
asked by sha 
ENGL
These three questions I am having difficulty in solving. Can you help me here. Question 1  a) Whenever children in the United States turn on the tv, B) they are more likely to encounter violence on the screen. A is an independent clause. A is a dependent
asked by David 
chemistry
rank the following ionic compounds in order of increasing lattice energy NaF, Csl, CaO
asked by re 
physics
About 50,000 years ago, in an area located outside Flagstaff, Arizona, a giant 4.5x10^7 kg meteor fell and struck Earth, leaving a 180 m hole now known as Barrington crater. If the meteor was traveling 20000 m/s upon impact, with what average force did the
asked by Eric 
Statistics
Suppose x is a uniform random variable with c = 40 and d = 50. Find the probability that a randomly selected observation exceeds 46
asked by jackie 
physics
A 9.00 kg object starting from rest falls through a viscous medium and experiences a resistive force = b , where is the velocity of the object. The object reaches one half its terminal speed in 5.54 s. (a) Determine the terminal speed. (b) At what time is
asked by kia 
math
Hitomi has a total of 30 red and blue bowling balls at her bowling alley. Each red ball weighs 8 lb. Each blue ball weighs 9 lb. If the total mass of the blue balls is 49 lb. heavier than the total mass of the red balls, how many red balls does she have?
asked by Katherine 
physics
A child swinging on a swing set hears the sound of a whistle that is being blown directly in front of her. At the bottom of her swing when she is moving toward the whistle, she hears the higher pitch, and at the bottom of her swing, when she is moving away
asked by Trace 
precalculus
The earth's atmospheric pressure, P, in terms of height above sea level is often modeled by an exponential decay function. The pressure at sea level is 1013 millibars and the pressure decreases by 14% for every kilometer above sea level. (a) What is the
asked by amanda 
geometry
A wire is attached to the top of a flag pole. The wire meets the ground 4 meters from the flag pole. The wire makes a 45 degree angle with the flag pole. How tall is the flag pole?
asked by Anonymous 
Physics
Two crewmen pull a raft through a lock, as shown in the figure . One crewman pulls with a force of 130 at an angle of 34° relative to the forward direction of the raft. The second crewman, on the opposite side of the lock, pulls at an angle of 45°. With
asked by Anonymous 
physics
An electric space heater draws 15.5 A from a 120 V source. It is operated, on the average, for 5.0 h each day. How much energy in kWh does in consume in 30 days? At 11 per kWh, how much does it cost to operate the heater for 30 days?
asked by Anonymous 
physics
Two positive charges of 5.43 µC each are 508 cm apart. Find the electric ﬁeld midway between them. What is the magnitude of the electric ﬁeld if one charge is positive and the other negative, both of magnitude 5.43 µC?
asked by Anonymous 
precalculus
An investment decreases by 4% per year for 3 years. By what total percent does it decrease after the 3 years?
asked by josh 
Physics
A parallelplate capacitor is made from two plates 12.0cm on each side and 4.50mm apart. Half of the space between these plates contains only air, but the other half is filled with Plexiglas of dielectric constant 3.40. An 18.0 V battery is connected
asked by Rachel 
Finance
You have found the following stock quote for RJW Enterprises, Inc., in the financial pages of today's newspaper. The closing price for this stock that appeared in yesterday's paper was $????. If the company currently has 17 million shares of stock
asked by Bradley 
physics
A string of 26 identical Christmas tree lights are connected in series to a 120 V source. The string dissipates 63 W. What is the equivalent resistance of the light string? Answer in units of Ω.
asked by Anonymous 
physics
A string of 26 identical Christmas tree lights are connected in series to a 120 V source. The string dissipates 63 W. What is the equivalent resistance of the light string? Answer in units of Ω.
asked by Anonymous 
physics
Two loudspeakers are 2.54 m apart. A person stands 3.04 m from one speaker and 3.50 m from the other. What is the lowest frequency at which destructive interference (sound cancellation) will occur at this point?
asked by Student in Need 
Physics
Your stereo is set to a sound intensity level (SIL) of 60 dB. I'd like to know what this means in terms of energy flow: what is the intensity of the sound wave this produces? Compute your answer in W/m2, but do not enter units. So in my problem it would be
asked by Student in Need 
Biochemistry
Describe the full preparation of 1.0L 0.2mol/L pH 4.4 acetate buffer. (pka=4.76, Mr Na acetate 82, glacial acetic acid is 17.4mol/L)
asked by Tumi 
geomerty
the measure of an interior angle is 60 degrees less than 11 times the measure of an exterior angle find the value of the interior angle
asked by Anonymous 
physics
Two positive charges of 5.43 µC each are 508 cm apart. Find the electric ﬁeld midway between them. What is the magnitude of the electric ﬁeld if one charge is positive and the other negative, both of magnitude 5.43 µC?
asked by Anonymous 
Physics (please help!!!!)
An astronaut is performing a space walk outside the International Space Station. The total mass of astronaut with her space suit and all lher gear is 127 kg. A small leak develps in her pulsion system and 5.84 g of gas are ejected each second into space
asked by Abigail 
physics
water has a specific heat of 4184 j(kg K). How much energy is needed to increase the temperature of a kilogram of water 5 degrees celcius?
asked by jesse bess 
HiSTORY ....helpppppp
Which of the following statements about the U.S. annexation of Hawaii is true? A. It was universally popular in the United States. B. The U.S. went to war with European powers to obtain the islands. C. It made both military and economic expansion in the
asked by ashley  HELP PLEASEE!!! 
physics
Calculate the value of g for a satellite that is orbiting in a circle at an altitude equal to 3 Earth radii. also, along the same lines, A typical shuttle altitude is 220 km. Calculate the value of g at this altitude. The the mass of the Earth = 5.98 x
asked by kelly 
Chemistry
A 1.50mol sample of helium at a certain temperature and pressure has a volume of 31.4L. A second sample of helium at the same temp and pressure has a volume of 42.2L. How many moles of Helium are in the second sample?
asked by naseeb 
ACCOUNTING
Department A had 10,000 units in work in process that were 30% converted at the beginning of the period at a cost of $10,000. During the period, 15,000 units of direct materials were added at a cost of $60,000, 16,000 units were completed, and 9,000 units
asked by Crystal 
physics
Two positive charges of 5.43 µC each are 508 cm apart. Find the electric ﬁeld midway between them. What is the magnitude of the electric ﬁeld if one charge is positive and the other negative, both of magnitude 5.43 µC?
asked by Anonymous 
chemistry
A quantity of 12.75 mL of a KOH solution is needed to neutralize 0.5109 g of KHP. What is the concentration (in molarity) of the KOH solution?
asked by Alex 
math
The function gives the cost to manufacture x items. C(x) = 20,000 + 5x − x2 20,000 ; x = 20,000 Find the average cost per unit of manufacturing h more items (i.e., the average rate of change of the total cost) at a production level of x, where x is as
asked by Beth 
Math
particles of mass 3m and 5 m hang one at each end of a light inextensible string which passes over a pulley.The system is released from rest with the hanging parts taunt and vertical.During the subsequent motion the resultant force exerted by the string on
asked by rob 
calculus
a company maufacturing surfboards has fixed costs of $300 per day and total costs of $5100 per day for a daily output of 20 boards. Assume the total cost per day C(x) is linearly related to the total output per day x. write an equation for the cost
asked by melissa 
deritives
Compute the indicated derivative. R(t) = −0.8t2; R'(7)
asked by la 
Organic Chemistry
What is the major product from the sulfuric acid and Hg(II)catalyzed hydration ethynylcyclohexane?
asked by Jenna 
Economics
What north Korean demand almost led to the failure of the most recent round of talks?
asked by Aleta 
Physics (please help)
An astronaut is performing a space walk outside the International Space Station. The total mass of astronaut with her space suit and all lher gear is 127 kg. A small leak develps in her pulsion system and 5.84 g of gas are ejected each second into space
asked by Abigail 
physics
2. Two equally charged balls, each of mass 0.10 gm, are suspended from the same point by threads 13 cm long. The balls come to rest 10 cm apart due to electrostatic repulsion. Determine the charge on each ball.
asked by ike 
Math
How many distinct permutations of the letters of the word OTTAWA being and end with the letter T? I did 6!/2! :S but i get 360. I tried 6P2=30 I am getting it wrong... help please.
asked by Jacob 
Chemistry
For the balanced equation shown below, if 40.1 grams of C2H3O2Br were reacted with 8.01 grams of O2, how many grams of H2O would be produced? 2C2H3O2Br+O2>4CO+2H2O+2HBr Thank you!
asked by Lelu 
physics
What forces are acting on a puck that is on an air hockey table?
asked by Ale 
Geometry/trig
How do I find the geometric mean between 12 and 2.4?
asked by Shannon 
English
Is "brittle" an onomatopoeia?
asked by Anna 
Physics
On a cold winter morning, a child sits on a sled resting on smooth ice. When the 9.20 kg sled is pulled with a horizontal force of 40.0 N, it begins to move with an acceleration of 2.50 m/s^2. The 23.0 kg child accelerates too, but with a smaller
asked by Molly 
Chemistry
how many grams of potassium dichromate are needed to make 250 mL of a 0.75 molar solution?
asked by Bobbi 
math
Find the lateral area for the prism. what formula do i us for this?
asked by danny 
geography
two states that are located in the northeast tip of the Southeast region of the united state.
asked by mekhi 
physics
2. Two equally charged balls, each of mass 0.10 gm, are suspended from the same point by threads 13 cm long. The balls come to rest 10 cm apart due to electrostatic repulsion. Determine the charge on each ball.
asked by ike 
trigonometry (please double check this)
Solve the following trig equations. give all the positive values of the angle between 0 degrees and 360 degrees that will satisfy each. give any approximate value to the nearest minute only. a.) ( I got confused doing this 1 can you help me with it.) 3 sin
asked by anon 
math
Compute f '(a) algebraically for the given value of a. HINT [See Example 1.] f(x) = −2x + 2; a = −5
asked by la 
Chemistry  NO2 Calculation
(a) Calculate [NO2] at each time interval, based on [O2]. Assume initial [NO2] = 0.0 mol/L. how do i calculate NO2 at this time intercal so when t= 600s O2 in mol/l = 0.0021
asked by Farah 
Trigonometry
use the appropriate trig identity (sum and difference, half angle, double angle) to find the exact value. 1)cos 255 degrees 2) sin 165 degrees 3) tan 285 degrees
asked by Jennifer 
physics
Your car is broken, so you’re pushing it. If your car has a mass of 868 kg, how much momentum does it have when it’s moving forward at 4.74 m/s (17.1 km/h)?
asked by olga 
Chemistry
CaCO3(s) CaO(s) + CO2 (g) A 5.9gram sample of CaCO3 (molar mass = 100.) is placed in an evacuated 2.00L container and heated to 200^oC. Equilibrium is reached when 5.15% of the CaCO3 has decomposed. 1)Write the Kp expression for this reaction and
asked by Patrick 
Civics
Is Aristocarzy limited or unlimited government
asked by Sawyer 
Chemistry
I have a simple question: why does mgcl2 have a higher boiling point than ncl3?? I thought mgcl2 in terms of intermolecular forces had just dispersions and because ncl3 had dispersions and dipole dipole ( cause it's polar) had a higher IMF therefore a
asked by Jesse 
algebra
a photograph now measures 33cm wide by 45 cm long. before it was enlarge its width was 11cm what equation represents this proportion
asked by antiginey 
Physics
A capacitor network has two capacitors in series: 150nF and 120nF. The potential difference between point a on the outer side of the 150nF capacitor and point b on the outer side of the 120nF capacitor is 120nF. a) total charge of the network= 2.4uC b)
asked by Jon 
physics
Two blocks, A and B (with mass 50 kg and 100 kg, respectively), are connected by a string, as shown in Figure P5.64. The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between block A and the incline is µk = 0.25.
asked by megan 
PHYSICS tension & angle
A van accelerates down a hill (Fig. P4.71), going from rest to 30.0 m/s in 6.70 s. During the acceleration, a toy (m = 0.250 kg) hangs by a string from the van's ceiling. The acceleration is such that the string remains perpendicular to the ceiling. Find
asked by megan 
Hydrogen bonding with polypeptides
In a polypeptide at physiologic pH, hydrogen bonding may form between which of the following? a) side chains of leucine residue and lysine residue b) side chains of aspartyl residue and glutamyl residue c) terminal amino acid group and terminal carboxyl
asked by Lena 
statistics
Let X be a continuous random variable that is normally distributed with mean, µ = 15 and standard deviation, σ = 2.8, find a value xo that represents the 80th percentile of the distribution.
asked by Jessie 
math
A recipe that makes 18 cookies calls for 3/4 cup of sugar. How much sugar is needed to make 24 cookies using this recipe?
asked by Sarah 
math
Use the Generalized PMI to prove: 2^n > n^2, for all n > 4 First of all, it's true for n=5. Then to prove it for n+1... Assume 2^n > n^2. Then 2^(n+1) = 2*2^n > 2*n^2 > 2*(4n) since n>4 => n^2>4n I'm stuck there.
asked by Pat 
physics
The length of the auditory canal in humans averages about 2.5 cm. What is the second lowest standing wave frequency for a pipe of this length open at one end? Use 345 m/s for the speed of sound. I know that 4L=lambda, so lambda= 10cm. I know that
asked by Trace 
physics
String instrument players can tune one string off of another  once you are happy with the tension and resulting pitch in one lower string, you put your finger down partway up the first string at the appropriate spot to make a higher pitch, one which
asked by Student in Need 
Science
what does DNA stand for? What is a gene? Where in the cell are chromosomes located? what two scientists established the structure of DNA? DNA is sometimes descrived as twisted ladder. What is this shape called? What forms the backbone of DNA? What forms
asked by brxce 
physics
What is the magnitude of the electric ﬁeld if one charge is positive and the other negative, both of magnitude 5.43 µC?
asked by Anonymous 
chemistry
How do you find the mass of a solution if you have 1L of 2.5 M MgCl2. I have determined how many moles are present in MgCl2 which was 2.5 and how grams are present which came out to be 238.025g Now I'm asked "What is the mass of the solution and the mass
asked by Jenna 
chem
which compound will dissolve better in water, NaCl or CsCl...explain!!! *hint* check eletronegativity!
asked by lee 
trigonometry
if the three sides of a triangle is 4,5,6 then the cosine of the angle between the sides 4 and 5 is
asked by rob 
geometry
The medians of a right triangle which are drawn from the vertices of the acute angle are 5 and root 40. What is the length of the hypotenuse? Can someone show me how to do it? thanks
asked by Something 
trigonometry (please double check this)
Solve the following trig equations. give all the positive values of the angle between 0 degrees and 360 degrees that will satisfy each. give any approximate value to the nearest minute only. 1. sin2ƒÆ = (sqrt 3)/2 2. sin^2ƒÆ = cos^2ƒÆ + 1/2 3. sin 2x
asked by anon 
reading
what is a metaphor using a time you were tired?
asked by rose 
physics
If the rotational speed of each wheel is 9 revolution per second, what are the tangential speeds of a point on the rim of each wheel? Note: Wheels spin independently with equal rotation speeds Diameter of Wheel A: 24 Diameter of Wheel B: 12
asked by kelly 
Social Psychology
How does selfhandicapping differ from defense mechanisms?
asked by Anonymous 
Chemistry
For the balanced equation shown below, if 40.1 grams of C2H3O2Br were reacted with 8.01 grams of O2, how many grams of H2O would be produced? 2C2H3O2Br+O2>4CO+2H2O+2HBr Thank you!
asked by Lelu 
algebra
The base of a triangle is 8 cm greater than the height. The area is 64 cm^2. Find the height and the length of the base.
asked by Valentine 
physics
010 (part 1 of 5) 10.0 points A string of 26 identical Christmas tree lights are connected in series to a 120 V source. The string dissipates 63 W. What is the equivalent resistance of the light string? Answer in units of Ω. 011 (part 2 of 5) 10.0 points
asked by Anonymous 
Pre Algebra
What are the length and width of a rectangular dog pen with a perimeter of 38 feet where the length is 2 feet less than twice the width? Write and solve a multistep equation for the problem.
asked by Duncan 
Trigonometry
Write equivalent equations in the form of inverse functions for a.)x=y+cos è b.)cosy=x^2 (can you show how you would solve) a.) x= y+ cos è cos è = xy theta = cos^1(xy) b.) cosy=x^2 cos(y) = x^2 y = Cos^1(x^2)
asked by anon 
physics
Suppose a sound of frequency 1200 Hz is emitted from a speaker 15 meters away from you. At YOUR location, the intensity is 1.0E7 W/m2. Let me assume your eardrum has area 8E5 m2. If the sound continues for 20 seconds, what total amount of energy is
asked by Student in Need 
ECONOMICS
WHAT DO GOVERNMENT STATISTCIANS CALCULATE GDP BY SIMPLY ADDING UP TOTAL SALES OFALL BUSINESSFIRMS IN ONE YEAR?
asked by T 
math
Solve the simultaneous equations (x +3)(y+ 5)=24 (y +5)(z7)=48 (z+ 7)(x+ 3)=32
asked by Manuel 
physics
Planets A and B orbit the same star. Planet B is four times further from the star than planet A and has twice the mass of planet A. The gravitational force of the star on planet B is ____ the force on planet A.
asked by love 
chemistry  decomposition of water(help)
Hydrogen is a very appealing fuel, in part because burning it produces only nonpolluting water. One of the challenges that researchers face in making hydrogen fuel a reality is how to produce hydrogen economically. Researchers are investigating methods of
asked by Farah 
mathpre algebra
what is 4a7=4(a2)+1?
asked by Helen 
chemistry  decomposition of water(help)
Hydrogen is a very appealing fuel, in part because burning it produces only nonpolluting water. One of the challenges that researchers face in making hydrogen fuel a reality is how to produce hydrogen economically. Researchers are investigating methods of
asked by Farah 
physics
There is a weight on a table, connected by a cord to another weight hanging over a pulley, as shown in the diagram below. The coefficient of kinetic friction for the weight on the table is 0:25. How fast does the hanging weight accelerate? Top weight is 12
asked by bill 
science
what is a good haiku poem about sodium??
asked by sieshaa 
Physics
Make an analogy between heat capacity and density. Describe which quantities correspond to one another. Thanks!
asked by A 
physics
A proton moves at right angles to a magnetic ﬁeld of 0.0609 T with a speed of 8.16×10 6 m/s. Find the magnitude of the acceleration of the proton. Answer in units of m/s 2
asked by Anonymous 
physics
The magnetic ﬁeld in a loudspeaker is 0.2 T. The wire consists of 308 turns wound on a 4.12 cm diameter cylindrical form. The resistance of the wire is 8.2 Ω. Find the force exerted on the wire when 15.8 V is placed across the wire. Answer in units of N
asked by Anonymous 
5th grade math
I need help with this problem ! 5 2/5  3 4/5= ? 6 1/10  3 4/10 = 10  4 2/5= ? PLEASE! SHOW ME EACH PROBLEM STEP BY STEP SO , I CAN FINISH MY HOMEWORK! THANK YOU!
asked by pat 
interview question
The letter which best completes the sequence below is: A D E H I ? Answer: J. K. L. M. N.
asked by Yvette 
chem
Calculate the freezing point and boiling point of a solution that contains 57.0 g NaCl and 53.4 g KBr dissolved in 750.3 mL H2O
asked by Anonymous 
Math
Luis needs to mMs. Large circular clock that measures anout 6 ft in circumference. Which equation can use the use to find r, the radius of the clock? A. R= 6/pie B. R=12/pie C. R=6/2pie D. R= 12/2pie
asked by Really needs help 
physics
If you sit in a good swivel chair with your feet off the floor, the chair will turn slightly as you move about but will immediately stop moving when you do. Why can’t you make the chair spin without touching something?
asked by olga 
math
solve for x by writing the equation in exponential form: log sub 4 x=2 log sub 5 (2x + 1)=2
asked by anonymous 
general chemistry.
The nutritional calorie (Calorie) is equivalent to 1 kcal. One pound of body fat is equivalent to about 4.1 103 Calories. If an athlete expends 1635 kJ/h, how long does she have to play to work off 1.0 lb of body fat?
asked by blah 
8th grade math
The following pattern continues indefinitely. REPEATREPEATREPEAT… 1) What is the 38th letter in the pattern? Explain your answer. 2) What is the 40th letter in the pattern? Explain your answer. 3) What is the 604th letter in the pattern? Explain your
asked by anonymus 
Chem PLZ HELP!
Consider 100g of 5.5% (mass) solution of NaNO3. Complete the following table, before calculating molarity, molality and mole fraction of NaNO3. Solute(NaNO3)Solvent(H2OSoln Mass(g) 100g Moles  RefInfo 85g/mol 18.02g/mol Density=1.00g/mol (This goes
asked by Kate 
college physics
If a rope with linear mass density .167kg/m and is 4m long, what are the lowest four frequencies of standing waves possible on such a rope? What is the fundamental frequency?
asked by Nick 
Chemistry
# moles of Ca3(PO4)2 produced from 3100g Ca3(PO4)2
asked by Rebecca 
math
2x + 4=4y + 4 Find the value of x.
asked by jen 
Chemistry
Change 50.0 ml at standard conditions to 43 degrees celsius and 750mmHg
asked by Anonymous 
physics
A bullet is shot straight upwards .It takes 18 seconds to reach the highest point in its trajectory.what was bullet maximum speed?
asked by sweety 
math
Compute f '(a) algebraically for the given value of a f(x) = x3 + 8x; a = 7
asked by la 
biology
If you inject carbon nanotubes into the body, can we produce antibodies against it? some ideas:  my answer is yes and no... the carbon nanotubes are too large for the tcell to destroy it; therefore, they won't have an affect. plus our whole body is made
asked by david 
Math
Find the exact number of cubes measuring 3 Cm. on an edge that will fill a box shaped like a rectangular prism that measure 24 cm by 18 cm by 9 cm
asked by Carrie 
physics
a 150 lb skydiver is falling in a head first position at a terminal (constant) velocity of 120 mi/h find the force in pounds of the skydiver
asked by fernanda 
math
Rail earns 10% commission on each guitar and 15% commission on each keyboard he sells. In two week he sold 5 guitars that cost$260 each and 2 keyboards that costv$420 each. How much commission did he earn on these seven items?
asked by paul 
Diversity and Culture
Do you believe that it is difficult to measure prejudice
asked by Anonymous 
Chem
Can u guys check my answer?? Question: convert 24 grams of ice at 10 degrees Celsius to water at 45 degrees Celsius. I got q= 13022 joules Is that correct?
asked by Hannah 
science
Please help what is the titration product of sodium hydrosulfite Na2S2O4 with sodium hypochlorite NaOCl?
asked by isaac 
math
f(x) = 7 ln x; estimate f '(4)
asked by la 
Math
A 20foot telephone pole casts a 4foot shadow. what shadow length will the 6foot man cast ? A) 1.2feet B) 2.1feet C) 2.2feet
asked by Haley 
math
simplify each expression by using properties of logarithms or definitions. check your results using the change of base formula a.) log3 27= b.) log5 (1/5)= c.) if f(x)= ln (x), find f(e^x)
asked by anonymous 
calc
Compute the indicated derivative. q(p) = 2.5 p + 3.2; q'(5) 1
asked by Beth 
world history
During the eighth century C.E., many of the rulers of Japan were A. women. B. commoners. C. from the merchant class. D. military strongmen
asked by josh 
Chemistry
how do you know which names end in ide, ite, and ate?
asked by Blain 
Chemistry
how many grams of potassium dichromate are needed to make 250 mL of a 0.75 molar solution?
asked by Bobbi 
reading
what is a simile using a neighborhood cat?
asked by rose 
Algebra
If I buy 2 apples and 6 oranges, I will spend $5.60. However, if I buy 6 apples and 2 oranges, I will spend $4.80. How much does one orange cost? Write the answer like this example: 48cents.
asked by joshua 
Trigonometry
Solve the following trig equations. Give all positive values of the angle between 0 degrees and 360 degrees that will satisfy each. Give any approximate value to the nearest minute only. 3 sin è  4 cos è = 2 Can you please help me with this one.
asked by anon 
Interview question
You are going to make a box out of cardboard. The box needs to measure 10 cm by 5 cm by 5 cm; 10% of the final product will be wasted in the cutting process. How much cardboard do you need? Multiple choice answers are: 125 cm. 140 cm. 200 cm. 250 cm. 275
asked by Yvette 
Math
find the gcf and lcm of 10, 60, and 32 and show work
asked by Lynn 
math
georgia is constructing a line perpendicular to xz at point x.with x as a center,she drew two arcs that intersect xz at points w and y.what is the next step she should take? a.set the compass wider and use points w and y as centers to draw arcs that
asked by redge 
geometry
The area of ETG is 400 square meters. To the nearest tenth of a meter , what is the length of side EG?
asked by Maria 
physics
There is a weight on a table, connected by a cord to another weight hanging over a pulley, as shown in the diagram below. The coefficient of kinetic friction for the weight on the table is 0:25. How fast does the hanging weight accelerate?
asked by bill 
college algebra
Solve: sq root of (x+1) minus 3 = sq root of (x+4) when I solve it I get zero, but when I plug it back in only one answer works. do both have to work for it to have a solution?
asked by Brenda 
Math
I want to make a fence with a perimeter of 42 feet and an Area of 58 square feet. Label all sides of the fence.
asked by Sue 
college prep math
what is the least common denominator of (x4/5x^214x3)(2x/10x^23x1)+(7x2/2x^27x+3)
asked by becky 
Geology maps
An environmental restoration project requires that you enlarge part of the map to a scale of 1 inch to 1000 feet. Calculate the factor by which it needs to be enlarged.
asked by Roger 
math
A circular room has radius equal to 40 feet. Marble is to be laid on a sector of the room. What is the area of the sector if the central angle is 45°?
asked by mariyah 
PreAlgebra: Help
I have to do a webquest for prealgebra and we have to make up a fundraiser thing, I need a list of things that one needs for a charity fundraiser, such as chairs, buffet tables, tables, tents, tablecloths. HELPP
asked by Cheryl 
Algebra I
Factor 9b2  4.
asked by kandys 
Math
Express the answer using scientific notation; retain all nonzero decimal places. (1.9 • 10^4) • (8.4 • 10^5)
asked by Jackster 
science
When a truck pulls a trailer, the trailer and truck accelerate forward even though the action and reaction forces are the same size but are in opposite directions. Why don’t these forces balance each other?
asked by sara 
Spanish
36. "¿Qué hora es?" "Son las once _________." a. por el día b. de la tarde c. de la noche d. en media hora D? 37. "¿Puedes sacar libros de la biblioteca?" "Sí, puedo _____ porque tengo tarjeta de biblioteca." a. las sacar b. a sacarlos c. sacarlos d.
asked by mysterychicken 
r.e
Please help i have to do an acrostic poem about renember i need it for tomorrow so someone plz answer asap
asked by katy alicia 
calculus
solve x^6
asked by melissa 
coordinate geometry
some smart person solve thiss ;] y18x+18=4 or help me im confused
asked by J 
math
round to nearest integer 14,495.98
asked by middle school 
chemistry
calculate the mass of water produced when 3 g HCL reacts with excess sodium carbonate
asked by joe 
Math
If a bag contains 50 marbles with 28 red ones and 22 blue ones. A marble is picked at random from the bag.what is the probability of picking a red marble after a blue marble was picked first?
asked by Kay 
Economics
Given the larger population runs in The States than in Canada, the costs are spread over more units. In fact in The States a cost over run of 10% could be dumped in Canada. Given the law of demand, what would happen to the Canadian company? If you worked
asked by David 
Calculus
f(x) = (5e^x6)/(17e^x+13) find f^1(x). since the domain of f^1(x) is in the open interval (a, b) what is a and and b?
asked by Robert 
College algebra
f(x)= (x)^3+11(x)^28(x)+7 find f(2)
asked by RAM 
Math
Emmy is 12. She writes an equation to find her mother's age, m. m  12 + 35 What operation solves the equation for m? add 12 to both sides, or subtract 12 from both sides, or multiply both sides by 12, or divide both sides by 12
asked by Jason 
calculus
f(x) = (5e^x6)/(17e^x+13) find f^1(x). then: the domain of f^1 (x) is in the open interval (a, b) find a and b
asked by Robert Born 
algebra
Nakia cut a board of 30ft long into 2 pieces. The ratio of the legnths of the 2 pieces is 2:3.what is the length, to the nearest foot, of the shorter piece
asked by didi 
Trigonometry (repost Reiny)
at 1:35am I posted ; Write equivalent equations in the form of inverse functions for a.)x=y+cos theta b.)cosy=x^2 my answers were a.) x= y+ cos theta cos theta = xy theta = cos^1(xy) b.) cosy=x^2 cos(y) = x^2 y = Cos^1(x^2) your post confused me a
asked by anon 
geometry
bisects and is perpendicular to line segments and . = 96 inches, and line segment = 52 inches. What is the length of ?
asked by megan 
physics
An airfilled parallel plate capacitor has a plate separation of 0.6 cm, and an area 179 mm2. In femtofarads (fF), what is the capacitance of this capacitor?
asked by crystal 
english
what are some Controversia topics in regards to what is happening in the news currently?
asked by kate 
Chemistry
1.278 mL of water at 10°C was placed in a 3.0 L container that was sealed and evacuated. Then, 3440 J of heat was added to the water. Determine the pressure inside the container after heating. (Assume all of the heat goes into the water.) d (H2O(s)) 1.00
asked by lisa 
physics
What would happen when a bird would fly in a moving train of speed 200km/h
asked by Shubham 
calculus
THE MEAN VALUE THEOREM; APPLICATIONS OF THE FIRST AND SECOND DERIVATIVES..... the base of an isosceles triangle is 6feet. Given that the altitude is 4feet and increasing at the rate of 2inches per minute, at what rate is the vertex angle changing? i really
asked by jazli 
ALGEBRA
If the cost of a cell phone has decreased 400% during the past 10 years, does that correspond to a cost decrease of four times? Explain your answer as though you were talking to someone who has never taken algebra.
asked by TANGIE 
Math
Rafael wants to use 30 centimeters of wood to frame a rectangular photo. What is the greatest area his photograph could have? a)14 sqaure cm b)36 square cm c)54 square cm d)56 square cm
asked by Trinity 
english
star is to ____ as island is to archipelago
asked by jiggles 
ALGEBRA
If the global climate were to warm significantly as a result of the greenhouse effect or other climatic change, the Arctic ice cap would start to melt. This ice cap contains the equivalent of some 680,000 cubic miles of water. More than 200 million people
asked by TANGIE 
Physics (please help!!!!)
A cart running on frictionless air tracks is propelled by a stream of water expelled by a gaspowered pressure washer stationed on the cart. There is a 1.00m^3 water tank on the cart to provide the water for the pressure washer. The mass of the cart,
asked by Abigail 
science
what happens when an ocean wave hits an oil spill?
asked by jen 
math
d14=13
asked by casey 
Math
What is the unit rate of 32 miles per hour?
asked by Haley 
chemistry
A gas occupies 8.2 liters at 2.5 atm. What is the pressure if the volume becomes 7.5 L?
asked by Dylan 
algebra 2
what is the foci of the graph x^2/36y^2/16=1
asked by Anonymous 
chemistry
A gas occupies 8.2 liters at 2.5 atm. What is the pressure if the volume becomes 7.5 L?
asked by Dylan 
health management
As health care manager what two strategies would you consider to help build internal and external relationships that could benefit your organizations?
asked by Samantha 
geometry
Which of the following is the best estimate for the area of a regulation archery target if the regulation target has 10 concentric circles, and has a radius of 24 inches.
asked by Britney 
College algebra
f(x)= (2)^3+11(2)^28(2)+7 find f(2) f(2)=8+44+16+7=75
asked by RAM 
integrals
integral of (x+6)/5
asked by john2 
physics
whats the difference between line current and phase current
asked by vera 
physics
for the equation y = y0 + vy0t + at^2/2, how to I get t alone. Im looking to slove for time
asked by Anonymous 
physics
what is the kinetic energy of a bear with a mass of 65 Kg and running at a speed of 20 m/s ?
asked by moxxi 
Socials
What does Serial format mean? It meansin weekly of monthly installments. What is Whist? It is a card game for four players divided into two teams. What are knickknacks? What does SpiritPower mean?
asked by Sara 
U.S.History 8th grade
Could someone help me with this question? Which of the following groups of workers lived in poverty? nurses unskilled workes technicians immigrants I'm torn between unskilled workers and immigrants
asked by Rachel 
Chemistry
would on mole of nitrogen gas have the same volume as 32g of oxygen gas? Explain.
asked by Mary 
psychology
Which of the following individuals is thought to be driven by intrinsic needs? A. Cheerleader B. A junior varsity basketball player
asked by Maria 
Economics
Given the larger population runs in The States than in Canada, the costs are spread over more units. In fact in The States a cost over run of 10% could be dumped in Canada. Given the law of demand, what would happen to the Canadian company? If you worked
asked by David 
Spanish
24. ¿Viste ______ sobre las ciudades de Venezuela el jueves pasado? a. el documental b. la clase c. las clases d. la telenovela A? 26. ¿Escuchó Ud. _____ sobre los coches nuevos? Mi padre ahora quiere comprar uno de esos coches. a. la comedia b. el
asked by mysterychicken 
Math
Leon drove 270 miles to the lodge in the same time as Pat drove 330 miles to the lodge. If Pat drove 10 miles per hour faster than Leon, then how fast did each of them drive?
asked by FCD 
science
i need help with chapter 5.1 for a chemstry review.
asked by marie 
geography
which two state northeast tip us of the south east region
asked by mekhi 
Physic
an "extended object" is in balance when the center of mass is located directly over the fulcrum. By using a test mass mT placed at various points xT on the object (as measured from some fixed reference point), a linear relationship between xT and the
asked by panda 
history
Shortly after Wilson's first call for a "new world order" a. germany reduced its submarine attacks in the Atlantic b.Turkey left the Central powers and joined the Allied cause c.England asserted the importance of its national goals over Arnerican
asked by sharice 
algebra
I have a space 43 foot long, and 22 stones 10 1/2" diameter each, how far apart to space them?
asked by Mary 
social studies
Compare/contrast real Julius Caesar to play by William Shakespeare
asked by Justin 
calculus
find all horizontal and vertical asymptotes of f(x)=2x^2+7x+12/2x^2+5x12
asked by kelly 
Math
(4y + 5) /2 = y + 9? Can you please help me solve this?
asked by Leah 
math
y28=98
asked by casey 
English
I wanted to clean the desk, because there was no room for anything on it. I, also, wanted to clean it because when papers where put down on the desk you could not find them later that day. Are these two sentences correct? Do you also put commas saying I,
asked by Pete 
Rock Science
Is the soft form of coal found in Slovakia and Slovania called lignite?
asked by Alyonka 
Math
A 20foot telephone pole casts a 4foot shadow. what shadow length will the 6foot man cast ? A) 1.2feet B) 2.1feet C) 2.2feet
asked by Haley 
English
Can you please tell me if the following expressions are possible? 1) Would it be all right with you if I got my book from the other room? I left it in my backpack. 2) Can you wipe the blackboard off? 3) You should return the book to the library in two
asked by Mike 
math
q(p) = 2.5 p + 3.2; q'(5)
asked by la 
physics
A tricycle releases 60 J of gravitational potential energy while rolling 0.59 m directly downhill along a ramp. What is the downhill force (if constant) acting on the tricycle?
asked by olga 
calculus
f(x) = (5e^x6)/(17e^x+13) find f^1(x). then: the domain of f^1 (x) is in the open interval (a, b) find a and b
asked by Anonymous 
math
how would I make 2.0 into a fraction
asked by poppa 
pre algebra
how would I make 2.0 into a fraction in siplest form
asked by poppa 
derivatives
Compute f '(a) algebraically for the given value of a. HINT [See Example 1.] f(x) = −2x + 2; a = −5 f '(a) = 1Your answer is incorrect.
asked by la 
Sciencies
Identify the major tenets or principles of constructivist teaching.
asked by Anonymous 
radical expression
5 (x) square of 8t (x)square 32t to the 5 power
asked by Anonymous 
Math
x+y=3 3x+2y=2 How to do this problem with substitution I would appreciated the help.
asked by Megan White 
Math
What is the area of a triangle with a base of 16 inches and a height of31 inches
asked by Kiley 
Algebra
If your car gets 32 miles per gallon of gas you need to travel 278 miles on day 1, 649 miles on day 2, and 482 miles on day 3. What is the function? What are the domain and the range?
asked by laura Mills 
Physics
A Vogon’s grandmother, whose mass is 89 kg, drifts through empty space with a velocity of –6.20 m/s until she encounters the 460kg Ravenous Bugblatter Beast of Traal, drifting with a velocity of +2.80 m/s. When they meet, the RBBoT immediately eats
asked by Kristen 
biology
what is the second law of thermodynamics.
asked by Anonymous 
radical expression
5sqrt8T (x) sqrt32T^5
asked by Anonymous 
math 6 th
A rectangle has a 60centimeter perimeter. What is the greatest possible area the rectangle could have?
asked by terri 
Peptide Bonds
Which of the following shows linear sequence of atoms joined by covalent bonds in peptide backbone. a) NCCNCCN b) NCONCO c) NCCONCCO d)NHCCNHCC The answer is a). Is that because it's the only one that linear; as in it doesn't
asked by Lena 
english
write a passage using rhetorical devices on aperson, idea or ideology
asked by sandip 
world history
Many early historians tended to look at the past in terms of
asked by lina 
lccc
An urn contains 4 red and 3 blue marbles. What is the probability when three marbles are selected randomly that all 3 will be red, if we select each marble a) with replacement b) without replacement
asked by daniel 
English
The students are not so talkative in their new seats, but, they still work well in groups. The students are not so talkative in their new seats, but they still work well in groups. Which way is correct?
asked by Pete 
clara baton hs
answer for 182.25+ y squared + 8y
asked by marie 
chemistry
A gas occupies 8.2 liters at 2.5 atm. What is the pressure if the volume becomes 7.5 L?
asked by Dylan 
Science
what effect did the shape of the basketball on your view of the approaching cardboard mountain?
asked by Michael 
Math
Whom should you see at the bank if you need to barrow money?
asked by Jamie 
Physics
If a bird moves with an initial velocity of 30secs and accelerates at the rate of 40m/s to cover a distance of 70km/hrs.Calculate the final velocity of the bird?
asked by Phillip 
English
Can someone please check this sentence. I want to make sure I DON'T need a comma in the sentence. THANKS! I have found her to be extremely competent in areas by exemplifying her creativeness through many challenges she has taken upon herself.
asked by april 
math
c68=78
asked by casey 
math
slope of (5,3), (3,1)
asked by Anonymous 
science
what is the cars motion relative to the starting point at time =8 minutes?
asked by akeyuanna 
physics
what are oscillators
asked by vera 
math
Make r the subject of the formula.V=1/3 pie r square h.2)express V in terms of N,T,K and Y:H=tvk square all over Y
asked by ABIGAIL 
Math
ADD: (14.9a^3+3.2a^25.1a)+(2.1a^23.7a+4.6)
asked by Jackster 
Math
a marble is 12mm diameter. What is the smallest height box that is 96mm square that can hold 200 marbles and still have the lid fit on the box without inference
asked by Tierra 
Math
multiply and check (a^2+4)(5a^33a1)
asked by Jackster 
geometry
a 30 degree angle cuts off an arc in a circle with a diameter of 10in find the length to the nearest hundredth
asked by clarissa 
College Algebra
Solve: 2x9√x +4=0
asked by Chris 
Math
Can someone help me out with project for Data Management. I need some topics that I could use for my thesis/hypothesis (with a lot of information) I had death rates as my topic but my teacher said he does not approve of it because the statistics for it is
asked by Joey 
Physics
find the height from which you would have to drop a ball so that it would have a speed of 9.0 m/s
asked by Cynthia 
math
the lenght of AB is 6 pi and mAB is 120 degrees. whays the diameter
asked by clarissa 
social studies
where did santa anna order the slaughtering of 350 men?
asked by sadie 
English
1. He is Arab. 2. He is Arabian. 3. He ia an Arab. 4. He is an Arabian. (Which one is correct?)
asked by rfvv 
Math
there are 3 red marbles , 3 blue marbles and 1 green marble in a bag. A marble is drawn at random from the bag and not replaced. Then a second marble is drawn. What are all the possible outcomes?
asked by Help 
geometry
Segments with the lengths of 6, 8, and 10 units will form what type of triangle?
asked by jelly 
math
scientific notation please exlain.
asked by meghan 
geometry
You are given two segments, with AB = 4 and with CD = 7. Explain how you could use only the congruentsegments construction to construct with EF = 1.
asked by ashley 
math
Find the set that describes the intersection of each pair of sets: a. C={people who are more than 20 years old}. D={people who are enrolled in college}. b. A={4,6,8}, B={2,4}. c. E={the odd whole numbers}, F={the even whole numbers greater than 40}.
asked by jeff 
language arts
Three Indian elephants patiently towed the logs that had just been cut. is this an adverb clause
asked by Anonymous 
Europe
glacers fishing is important uses geothermal energy to heat homes was once a territory of denmark
asked by heather 
algebra
If your car gets 32 miles per gallon of gas you need to travel 278 miles on day 1, 649 miles on day 2, and 482 miles on day 3. What is the function? What are the domain and the range?
asked by Kathy 
proabilities
Suppose the NBA has decided to add two more teams to the league. If 18 cities have applied for franchises, what is the probability that in a random drawing, the league selects the two westernmost cities? Having trouble with this one.
asked by marco 
math
(11/2^2 )(11/3^2 )(11/4^2 )…(11/2011^2 )
asked by John 
Math
m=2,4,6,8 and n=18,16,14,12 what is the equation for m and n
asked by Shelly 
ENGLISH
Please check for commas errors, speling and any other grammar error. Please provide the correc answer. The quality in the air in our community interests all of us. We must all work together to keep the air safe for our children. During the past six months
asked by angela 
Anthro.  Project
I am doing a poster project, where I have to research the use of great apes today and I have to decide if I am for it or against it. Where can I find the best information for this topic? Thank you.
asked by Alex L. 
Economics (SraJMcGin)
Given the larger population runs in The States than in Canada, the costs are spread over more units. In fact in The States a cost over run of 10% could be dumped in Canada. Given the law of demand, what would happen to the Canadian company? If you worked
asked by David 
statistics
Can someone help me out with project for Data Management. I need some topics that I could use for my thesis/hypothesis (with a lot of information) I had death rates as my topic but my teacher said he does not approve of it because the statistics for it is
asked by Joey 
health
what is nicotine?
asked by anonymous 
Biology
The human retina has an area of about 1000 mm^2. If we have a total of 125 million rods and 6.5 million cones in each eye, show that we have about 131,500 sensory cells per square millimeter in the retina.
asked by Stephanie 
algebra
aT 12 MPG, AND 4$ per gallon, what is the cost to drive 525 mi
asked by cathie 
fractions
2/5 of 15=?
asked by karina 
math
patterns and equations: x: 0,3,__,10 y: __, 8, 12,15
asked by matthew 
math HELP PLS!
using 4 fives, with any signs( +, , /, x, etc.) sum to 24.
asked by bobby 
math
what is the value of c approximatedto 3 decimal places ,, the value of c is 112 and can you explain as how to get the answer
asked by tracy 
math
what is the value of c approximatedto 3 decimal places ,, the value of c is 112 and can you explain as how to get the answer
asked by tracy 
grammar
after graduating from te dog acadeny wivues decide to stat is own rock and roll band identify declarative or interrogative
asked by Anonymous 
sex ed
what is a virgin?
asked by Billy Bob 
Stats (ChiSquare)
Suppose you have a chisquars GOF test to test null hypothesis that the age distribution of drivers stopped in 2003 for traffic violations is the same as the age distr. in 2002. You compute chisquare= 14.7. At the 5% significance level, what is an
asked by Graciela 
math
There are 3 red marbles, 3 blue marbles, and 1 green marble in a bag. A marble is drawn at random from the bag and not replaced. Then a second marble is drawn. What are all the possible outcomes?
asked by Holden 
Geography
Ok I have a really hard question that my teacher said requires the internet...How did the Communist Rule contribute to the pollution problems of Eastern Europe? I googled it and up came this Wikipedia page but there was nothing on it....I am Really
asked by Alyonka