Questions Asked on
November 16, 2012

HELP !!! Algebra 2
15. What is the solution of the linearquadratic system of equations? {y = x^2 + 5x  3} {y  x = 2}
asked by Robert 
7th grade math Ms. Sue please
1. Identify the part, whole, and percent in the following statement: Find 15% of 750. (1 point) part = 750, whole = n, percent = 15 part = 15, whole = 750, percent = p part = n, whole = 750, percent = 15 none of these 2. Write a percent equation that can
asked by Delilah 
Math Word Problem
Ron is tiling a countertop. He needs to place 54 square tiles in each of 8 rows to cover the counter. He wants to randomly place 8 groups of four blue tiles each and have the rest of the tiles in white. How many white tiles will Ron need?
asked by Shane 
posibility
Three men and three women are waiting to be interviewed for jobs. If they are all selected in random order find the probability of each event. No man will be interviewed until at least two women have been interviewed.
asked by Katy 
Chemistry
The value of Keq for the equilibrium H2 (g) + I2 (g) ↔ 2 HI (g) is 794 at 25 °C. What is the value of Keq for the equilibrium below? 1/2 H2 (g) + 1/2 I2 (g) ↔ HI (g)
asked by Josh G. 
chemistry
NH4NO3(s) NH4+(aq) + NO3−(aq) In order to measure the enthalpy change for this reaction above, 1.07 g of NH4NO3 is dissolved in enough water to make 25.0 mL of solution. The initial temperature is 25.8°C and the final temperature (after the solid
asked by DeeDee 
Grammar
Which of the sentences below displays the correct punctuation? A.The patient looked at the doctor as though he had never seen her before. B.Even though Laura is very young she is already a skilled chess player. C.Carlos asked me to buy the gift, since I am
asked by Anon 
math
The quantity demanded each month of the Sicard wristwatch is related to the unit price given by the equation below, where p is measured in dollars and x is measured in units of a thousand. To yield a maximum revenue, how many watches must be sold? (Round
asked by Britney 
chemistry
0.4324 g sample of a potassium hydroxidelithium hydroxide mixture requires 28.28 ml of 0.3520 M HCl for its titration to the equivalence point. What is the mass percent lithium hydroxide in this mixture?
asked by nooor 
physics
Unpolarized light passes through six successive Polaroid sheets each of whose axis makes a 59 degree angle with the previous one. What is the intensity of the transmitted beam, I/Io?
asked by Lauren 
physics
A block of mass m = 3.6 kg, moving on a frictionless surface with a speed vi=9.3m/s makes a perfectly elastic collision with a block of mass M at rest. After the collision, the 3.6 kg block recoils with a speed of vf=2.7m/s. In Figure 8.2, the speed of the
asked by terry 
Chemistry
A piece of copper metal is initially at 100 C. It is dropped into a coffee cup calorimeter containing 50.0 g of water at a temperature of 20 C. After stirring, the final temperature of both copper and water is 25 C Assuming no heat losses, and that the
asked by Natalie 
Statistics
An electrical firm which manufactures a certain type of bulb wants to estimate its mean life. Assuming that the life of the light bulb is normally distributed and that the standard deviation is known to be 40 hours, how many bulbs should be tested so that
asked by Blerp 
Physics
Two waves in one string are described by the wave functions y1 = 2.90 cos (3.80x  1.50t) y2 = 3.90 sin (4.80x  2.10t) a) where y and x are in centimeters and t is in seconds. Calculate the superposition of the waves y1 + y2 at the points x = 1.50, t =
asked by Hau 
trig
A plane is flying with an airspeed of 150 miles per hour and heading 155°. The wind currents are running at 25 miles per hour at 160° clockwise from due north. Use vectors to find the true course and ground speed of the plane.
asked by janice 
Math
Write each rate as a unit rate 14 hours in 2 weeks 7 hours in 1 week? 36 pieces of candy for 6 children 6pieces of candy for 1 child? 8teaspoons for 4 cups 2teaspoons per cup?
asked by Jerald 
math
At Strawberry State College, the ratio of females to males is 2:1. If there are 2100 students, how many are female and how many are male?
asked by Christina 
trig
A ship is headed due north at a constant 20 miles per hour. Because of the ocean current, the true course of the ship is 15°. If the currents are a constant 18 miles per hour, in what direction are the currents running? (Enter your answers as a
asked by janice 
trig
A 52foot wire running from the top of a tent pole to the ground makes an angle of 57° with the ground. If the length of the tent pole is 44 feet, how far is it from the bottom of the tent pole to the point where the wire is fastened to the ground? (The
asked by janice 
Chemistry
A common laboratory reaction is the neutralization of an acid with a base. When 50.0 mL of the .500 M HCl at 25 C is assed to 50 mL of .500 M NaOH at 25 C in a coffee cup calorimeter, the temperature of the mixture rises to 28.2 C. What is the heat of
asked by Jan 
Calculus
The halflife of Radium226 is 1590 years. If a sample contains 100 mg, how many mg will remain after 4000 years?
asked by Anonymous 
English  Ms. Sue
Her rolls always rise properly. A.risen B.raised C.rised D.no change necessary The underlined word is rise. I think it is D. no change??
asked by Deborah 
Chemistry
A piece of copper metal is initially at 100 C. It is dropped into a coffee cup calorimeter containing 50.0 g of water at a temperature of 20 C. After stirring, the final temperature of both copper and water is 25 C Assuming no heat losses, and that the
asked by Natalie 
physics
A cyclist approaches the bottom of a gradual hill at a speed of 12.4 m/s. The hill is 6.7 m high and the cyclist estimates she is going fast enough to coast up and over it without peddling. Ignoring air resistance and friction, find the speed at which the
asked by Anonymous 
social studies
according to the article,which action is suggested as the best way to prevent death and injury from natural disasters? (1)control inflation. (2) limit information about natural disasters that occur. (3)put more money into scientific research on natural
asked by james anthony 
Statistics
A study conducted by an airline showed that a random sample of nine of its passengers disembarking at the Cleveland airport, took an average of 24.1 minutes to claim their luggage. From a previous survey it was willing to assume that time to claim luggage
asked by Blerp 
math
At a certain college, there are 7 men for every 5 women. If there are 440 more men than women, what is the total enrollment?
asked by Stephanie 
chemistry 104
estimate the enthalpy change for each of the following reaction: a) H2C=O(g)+HCl(g .....> H3COCl(g) b)H2O2(g)+2CO(g).....> H2(g)+2CO2(g) c)3H2C=CH2(g).....> C6H12(g) (the six carbon atoms form a sixmembered ring with two H atoms on each C atom)
asked by oluchi 
trig
A plane has an airspeed of 190 miles per hour and a heading of 24.0°. The ground speed of the plane is 214 miles per hour, and its true course is in the direction of 40.0°. Find the speed and direction of the air currents, assuming they are constants.
asked by janice 
social studies
which of the following is a example of a natural hazard of the type and magnitude of those referred to in the article? (one) an automobile accident (two)a rain shower (three) a volcanic eruption (four) a falling tree limb (five) a fire in a restaurant
asked by james anthony 
Physics
Two disks are rotating about the same axis. Disk A has a moment of inertia of 3.8 kg · m2 and an angular velocity of +6.7 rad/s. Disk B is rotating with an angular velocity of 8.9 rad/s. The two disks are then linked together without the aid of any
asked by Elizabeth 
Chem
Use the table to calculate an approximate enthalpy or heat of reaction for the combustion of one mole of methane gas (CH4) to form gaseous H2O and CO2. What Volume (in L) of methane is needed to produce 3329 kJ of heat for methane gas at 36 oC and 9.15 atm
asked by Anonymous 
Chemistry
A piece of copper metal is initially at 100 C. It is dropped into a coffee cup calorimeter containing 50.0 g of water at a temperature of 20 C. After stirring, the final temperature of both copper and water is 25 C Assuming no heat losses, and that the
asked by Natalie 
Chem
Use the table to calculate an approximate enthalpy or heat of reaction for the combustion of one mole of methane gas (CH4) to form gaseous H2O and CO2. What Volume (in L) of methane is needed to produce 3329 kJ of heat for methane gas at 36 oC and 9.15 atm
asked by Anonymous 
English  Ms. Sue
In 1960, American scientists raise a serious concern. A.raising B.raised C.have raised D.no change necessary The word underlined is raise and they want you to identify the correct form of it. I think it would be B. raised
asked by Deborah 
Algebra
Jamie ran two laps around a track in 99 s. How long did it take him to run each lap if he ran the first lap at 8.5 m/s and the second at 8.0 m/s?
asked by Kevin 
Chemistry
A piece of copper metal is initially at 100 C. It is dropped into a coffee cup calorimeter containing 50.0 g of water at a temperature of 20 C. After stirring, the final temperature of both copper and water is 25 C Assuming no heat losses, and that the
asked by Natalie 
Stats
Recently, a price war has developed among retailers selling Brand X denim jeans. A major chain buyer wishes to estimate the mean price of these jeans during this period to compare it to the normal selling price of $20.00. A random sample of 7 major
asked by Mike 
trig
Find all solutions to the following triangle. (Round your answers for angles A, B, A', and B' to the nearest minute. Round your answers for sides a and a' to the nearest whole number. If either triangle is not possible, enter NONE in each corresponding
asked by janice 
Math
Find the ratio of bananas to oranges. WRite the ratio as a fraction in simplest form. Then explain its meaning. 1/3? 1 banana to 3 oranges?
asked by Jerald 
math
On a TV game show, a contestant makes $800 for every correct answer but loses $500 for every wrong answer. After answering 26 questions, Sarah broke even. How many questions did she answer correctly?
asked by Christina 
physics
Point P is on the rim of a wheel of radius 2.0 m. At time t = 0, the wheel is at rest, and P is on the x axis. The wheel undergoes a uniform angular acceleration of 0.01 rad/s^2 about the center O. In Figure 9.1, the magnitude of the linear acceleration of
asked by terry 
math
A small resort is situated on an island that lies exactly 4 miles from , the nearest point to the island along a perfectly straight shoreline. 10 miles down the shoreline from is the closest source of fresh water. If it costs 1.5 times as much money to lay
asked by Jd Gonzales 
Probability
Three men were walking down a street talking when they met a fourth man. If the fourth man knew that two of the men always lied and the third always told the truth and he asked the three a question, what is the probability that he got a truthful answer
asked by Sara Beth 
Math
A penny, a nickel and a dime and a quarter are tossed. What is the probability of obtaining at least three heads?
asked by Sara Beth 
physics
A force in the +y direction applied at the point x=2.3m,y=1.4m gives rise to a torque of 39n*m about the origin. Find the magnitude of the force.
asked by jenn 
social studies
which of the following statements is supported by the information in the map? ONE) australia is selfsupporting in oil two)Africa trades oil only with south America.three)the soviet Union has trade routes with every major continent. four) all of the major
asked by nadia 
physics
To drive a typical car at 40 mph on a level road for one hour requires about 3.2 × 10^7 J of energy. Suppose one tried to store this much energy in a spinning solid cylindrical flywheel which was then coupled to the wheels of the car. A large flywheel
asked by terry 
science
It takes 3.38 J of work to stretch a Hooke’slaw spring 5.63 cm from its unstressed length. How much the extra work is required to stretch it an additional 4.22 cm? Answer in units of J
asked by jason 
chemistry
a 0.01M aqueous NaOH has a hydroxide concentration of  M
asked by florence 
chem
how much heat is required to vaporize 34.8g of water at 100 degrees celcious?
asked by lawrece 
algebra
20+2x/5x For what value of x is the rational expression below equal to zero?
asked by myra 
calculus
find the area of the largest rectangle having one side on the x axis and inscribed in the triangle formed by the lines y=x, y=0, and 3x + y = 20
asked by eav 
math
Three men and three women are waiting to be interviewed for jobs. If they are all selected in random order find the probability of each event. All the women will be interviewed first. No man will be interviewed until at least two women have been
asked by Andrew 
Economics, General Program Section 2
A day trader tries to make a profit by A. investing only in blue chip stocks. B. speculating with borrowed money. C. reducing risky investments. D. taking advantage of minutebyminute changes in stock prices.
asked by kathrine 
Algebra
Jan can run at 7.5 m/s and Mary at 8.0 m/s. On a race track Jan is given a 25m head start, and the race ends in a tie. How long is the track?
asked by Kevin 
psychology
According to Gardner, a)a single general ability underlies all of our abilities to adapt to our environment. b)intelligence is a complex set of abilities made up of several distinct but related domains. c)intelligence cannot be measured by paper and pencil
asked by allee 
books
Ambrose Biercs Could someone that has read the story check my work? 1. The grayclad soldier who tells Farquhar about the bridge is on his way to the bridge. a Federal scout. ****** frightened of being caught and hanged. planning to burn the bridge. 2.
asked by lee 
psychology
Terry often gets lost when driving places. It seems he just can't understand maps and often confuses north with south. Terry is probably weak in which type of intelligence? a)linguistic b)kinesthetic c)logical d)spatial Anthea is people smart. She is good
asked by allee 
physics
A 5kg box is released on a 30 degree incline and accelerates down the incline at 2.79 m/s^2. To the nearest tenth of a Newton, what is the friction force impeding its motion?
asked by Danielle 
math
what is 14.76 rounded to the nearest hundredth?
asked by B 
Physics
A force of 5 N is applied to a door perpendicular to its face at a distance of 0.75 m from its hinge. What is the torque on the door about the hinge?
asked by Bryan 
psychology
Crosscultural data find that when racial gaps exist in other cultures, it is the _____________________ groups that typically show lower scores. a) economically disadvantaged b) minority c) majority d) linguistically different
asked by allee 
physics....properties of matter....ASAP.pls
Helium gas occupies a volume of 0.04m^3 at a pressure of 2*10^5 N/m^2 and a temperature of 300K,calculate: 1.) the mass of helium 2.)the root mean square speed of its molecule 3.)the root mean square speed at 432K when the gas is heated at constant
asked by adewuyi 
Math
Suppose the supply and demand for a certain videotape are given by: supply: p=1/3q^2; demand: p=1/3q^2+48
asked by Anonymous 
trig
Find all solutions to the following triangle. (Round your answers for angles A, C, A', and C' to the nearest minute. Round your answers for sides a and a' to two decimal places. If either triangle is not possible, enter NONE in each corresponding answer
asked by janice 
quantitative methods
21. The Seneca Children’s Fund (SFC) is a local charity that runs a summer camp for disadvantaged children. The fund’s board of directors has been working very hard over recent years to decrease the amount of overhead expenses; a major factor is how
asked by Karen 
physics
a child bounces a superball on the sidewalk. The velocity change of the superball is from 23m/s downward to 14m/s upward. if the contact time with the sidewalk is 1/800s, what is the magnitude of the average force exerted on the superball by the sidewalk?
asked by crystal 
Economics
Which of the following will not produce an outward shift of the production possibilities curve? Reduction in unemployment rate. How? Wouldn't more employment produce more goods??
asked by Leyla 
Math
Franco is ordering lunch with a drink, sandwich, and a salad. He has a choice of 3 drinks, 2 sandwiches, and 4 salads. How many possible lunches are there? 3*2*4=24 lunches?
asked by Chris 
chemistry
Explain the observation: water used to sterilize surgical equipment is heated to 120 degrees celsius at 2.0 atm in an autoclave.
asked by Boo Boo 
social studies
which of the following statements is supported by information in the article? (1)people are better informed about hurricanes than they are about floods.(2) natural hazards can be prevented if people are educated about their occurrence. (3)increaed losses
asked by james anthony 
Math
A Target consists of three concentric circles with the same center. The radii of the circles have lengths of 3 inches, 7 inches and 9 inches. The 7 inch radii spacing is shaded. (To the nearest percent,) What percent of the target is shaded?
asked by LP 
science
for the emission spectrum of Be3+, calculate the lowest wavenumber νˉ (in inverse meters) of light produced by electron transitions between n=2, n=3, and n=4.
asked by lef 
english
Select the gerund phrase in the sentence below. Then, determine the noun function of the gerund. 1. Water skiing, sailing, and swimming are my favorite summer sports. 2. I enjoy playing the piano.
asked by amber 
math
Paul's Pizzeria sells 45 cheese pizzas and 20 pepperoni pizzas each week. What is the ratio of cheese pizzas to pepperoni pizzas sold each week by Paul's Pizzeria?
asked by john 
Physics (torque)
The steering wheel of a certain vehicle has a diameter of 38.9 cm, and it turns a shaft that is 8.3 cm in diameter. If a 85.9 N force is needed to turn the steering wheel, what torque is exerted on the wheel?
asked by Anonymous 
does anyone know probability????
The digits 2, 3, 4, 7, and 8 are each used once in a random order to form a fivedigit number. What is the probability that the resulting number is divisible by 4? Express your answer as a common fraction.
asked by epicmathfailure 
advanced statistics
suppose a student takes a multiple choice test with 10 questions. suppose each question has 4 possible answers. if the student guesses randomly on each questions,what is the probability that the student gets exactly 6 correct? less than 7 are correct?
asked by anonymous 
trig
Find all solutions to the following triangle. (Round your answers to one decimal place. If either triangle is not possible, enter NONE in each corresponding answer blank.) A = 115.2¡ã, a = 43.6 cm, b = 23.1 cm First triangle (assume B ¡Ü 90¡ã): B =
asked by janice 
chemistry
A sample containing 4.8g of O2 gas has a volume of 15.0L. Pressure and temperature remain constant. What is the new volume if 0.500 mole of O2 gas is added?
asked by Boo Boo 
Math
If a tree cast a shadow 30 feet long at the same time that a boy 5 feet tall cast a shadow 3 long. Find the height in feet of the tree.
asked by Gerri 
physics
A phone cord is 4.25 m long. The cord has a mass of 0.200 kg. A transverse wave pulse is produced by plucking one end of the taut cord. The pulse makes four trips down and back along the cord in 0.780 s. What is the tension in the cord?
asked by diamond 
geography
he kind of economy that was created in Pittsburgh is called a. postindustrial. c. postmodern. b. commoditybased. d. twentyfirst century.
asked by Katt13unknownchika 
HELP! Physics
A heat engine operates between two reservoirs at temperatures of 19.7oC and 294oC. What is the maximum efficiency possible for this engine?
asked by Erika 
math
Three men and three women are waiting to be interviewed for jobs. If they are all selected in random order find the probability of each event. No man will be interviewed until at least two women have been interviewed.
asked by Katy 
Physics
A 980 kg car traveling at 20 m/s rounds a curve of radius 40 m. What is the friction force that must act on the car to keep it in its circular path?
asked by Mark 
physics
A 50 kg uniform ladder, 5.0 m long, is placed against a smooth wall at a height of h = 3.7 m. The base of the ladder rests on a rough horizontal surface whose coefficient of static friction is 0.40. An 80 kg block is suspended from the top rung of the
asked by jenn 
Physics
A long jumper leaves the ground at an angle of 24.3◦ to the horizontal and at a speed of 10.6 m/s. How far does he jump?
asked by Jack 
math
a wheel makes 9 3\10 revolutions per minute. if it rotates for 85 minutes . How many revolutions does make ?
asked by noor 
Chemistry
Calculate the pH of a solution at 25.0 °C that contains 1.94 × 1010 M hydronium ions.
asked by Josh G. 
AP U.S. History
What diplomatic problems did the french revolution and the war that followed pose for the united states? How did Washington and Congress deal with this problem?
asked by Ben 
posibility
One problem encountered by developers of the space shuttle program is air pollution in the area surronding the launch site. Acertain direction from the launch site is considered critical in terms of hydrogen chloride pollution from the exhaust cloud. It
asked by Allen 
Math
A cubic centimeter is the same as 1 mL. If a humpback whale has more than 1 kL of blood, how many cubic centimeters of blood does the humpback have?
asked by Mary 
Math
The area of a circus ring is about 1,385 square feet. What is the circumference of the ring?
asked by Chris 
Physics
How long would it take a 1.00 x 10^3 W heating element to melt 2.00kg of ice at 20 deg C, assuming all energy is absorbed by the ice?
asked by R 
physics what am i doing wrong?
Three masses are arranged in the (x, y) plane. 3kg (0,0) 7kg (10,0) 6kg (0,3) What is the magnitude of the resulting force on the 3 kg mass at the origin? The value of the universal gravitational constant is 6.6726 × 10^−11 N · m^2/kg^2. Answer in
asked by michelle 
Physics
A 13.6m length of hose is wound around a reel, which is initially at rest. The moment of inertia of the reel is 0.40 kg · m2, and its radius is 0.151 m. When the reel is turning, friction at the axle exerts a torque of magnitude 3.42 N · m on the reel.
asked by Elizabeth 
trig
Find all solutions to the following triangle. (Round your answers for angles A, C, A', and C' to the nearest whole number. Round your answers for sides c and c' to two decimal places. If either triangle is not possible, enter NONE in each corresponding
asked by janice 
math
The mean amount spent by a family of four on food per month is $550 with a standard deviation of $85. Assuming that the food costs are normally distributed, what is the probability that a family spends less than $410 per month?
asked by Anonymous 
math
If exactly 198 people sign up for a charter flight, Leisure World Travel Agency charges $308/person. However, if more than 198 people sign up for the flight (assume this is the case), then each fare is reduced by $1 for each additional person. Hint: Let x
asked by tamera 
Chemistry
What is magnesium oxide? a. Polyatomic ion b. Ionic compound containing polyatomic ion c. Monatomic ion d. Oxyanion Is the answer d?
asked by Anonymous 
math
each day, Jason walks to his office at a constant rate. one third of the way he passes a bank and threefourths of the way to work he passes a store. at the bank his watch reads 6:52 am and at the store it reads 7:02 am. at what time was jason halfway to
asked by dell 
trig
A barge is pulled by two tugboats. The first tugboat is traveling at a speed of 16 knots with heading 135°, and the second tugboat is traveling at a speed of 15 knots with heading 195°. Find the resulting speed and direction of the barge. (Round your
asked by janice 
Physics
Three blocks are in contact with each other on a frictionless horizontal surface. A 417 N horizontal force is applied to the block with mass of 3.7 kg as shown in the ﬁgure below. The acceleration of gravity is 9.8 m/s^2. (the picture looks like this) F
asked by alice 
Physics
It can be shown that for a uniform sphere the force of gravity at a point inside the sphere depends only on the mass closer to the center than that point. The net force of gravity due to points outside the radius of the point cancels. Part A How far would
asked by Kaan 
History
5. Why is the Constitution the nation's most important document? Because it has provided the framework for United States government and helped preserve basic rights for over 200 years Because it is the document that first articulated America's independence
asked by Jman 
Physics
There is a bicycle wheel resting against a small step whose height is h = 0.132 m. The weight and radius of the wheel are W = 27.3 N and r = 0.324 m, respectively. A horizontal force is applied to the axle of the wheel. As the magnitude of increases, there
asked by 4319 
Math
i am a number between 50 and 60. one of my factors is 28. qhat number am I?
asked by Lizzy 
Calculus
A 12' ladder is leaning against a wall making an angle theta with the ground. The ladder begins to slide down the wall. what is the rate of change of the height of the ladder, h, with respect to the change in the angle of the ladder with the floor when the
asked by Anonymous 
science
An outfielder throws a 1.88 kg baseball at a speed of 57 m/s and an initial angle of 10.2. What is the kinetic energy of the ball at the highest point of its motion? Answer in units of J
asked by jason 
Geo 7th Grade
To help reduce air pollutions legislation had been passed a. stating that all vehicles made after 2015 must contain hybrid engines. b. banning the use of any items that cause smog. c. limiting automobile gas emissions, d. requiring all households to have
asked by rawr... im a dinosaur.... rawr 
chemisrty
When a substance changes from one phase to another, which of the following occurs? the substance loses or gains heat the average kenetic energy of the substance changes the temperature of a substance changes the molecular motion of a substance changes
asked by Tasia 
algerbra
parking in a student lot costs $1 for the first half hour and $1.25 for each hour there after. a partial hour is charged the same as a full hour what is the longest time that a student can park in this lot for $7?
asked by Anonymous 
science
Estimate the 4th ionization energy of beryllium (Be). Express your answer in Joules (J/atom).
asked by hi 
Math
Which expression is equal to log243
asked by Morgan 
Statistics
If you roll a fair die 100 times and 35 of the rolls result in a six, what would be the probability of the outcome of a 2, P(2)? P(2) = 0.02 P(2) = 2 P(2) = 35 P(2) = 0.35
asked by John 
science
According to the principle of superposition, in a stack of undisturbed sedimentary rocks, the oldest rocks are _____. Gaps in rock layers are called ____. Which of the following is not a type of unconformity?
asked by Caitlin 
Calculus
A recording camera is located 2500 feet from the launch pad for recording a rocket launch. As the rocket lifts off, the angle of elevation of the camera increases 4 degrees per second while recording the launch. Find the instantaneous velocity and
asked by BA 
can someone please help w/ physics?
An object of mass 154 kg moves in a smooth straight tunnel of length 2990 km dug through a chord of a planet of mass 3.19 × 10^24 kg and radius 1 × 10^7 m Find the eﬀective force constant of the harmonic motion. The value of the universal gravitational
asked by michelle 
math
Find the equation of the line that passes through the points (2/3, 5/4)and (3, 5/6). Write the answer in slopeintercept form and standard form with integer coefficients. Thank you.
asked by daniel 
math
Assuming boy and girl babies are equally likely, find the probability that it would take a) at least three births to obtain two girls b) at least four births to obtain two girls c) at least five births to obtain two girls
asked by Andrew 
ecoomics
If the multiplier is 4, a $10 billion increase in autonomous investment will cause a
asked by donald 
chemistry
A sample containing 4.8 g of O2 gas has a volume of 15.0L. Pressure and temperature remain constant. What is the volume after 4.00g of He is added to the 4.8g of O2 gas in the container
asked by Boo Boo 
8th Grade math  Ms. Sue please
An archaeologist has set up a dig at a newly discovered site. She and her team start excavating an area that is 36 feet by 24 feet. Because the scientists find many artifacts near the edges of this area, they decide to expand the dig. They add nine feet in
asked by Chris 
Probability
At a certain hospital, 40 patients have lung cancer, 30 patients smoke, and 25 have lung cancer and smoke. Suppose the hospital has 200 patients. If a patient chosen at random is known to smoke, what is the probability that the patient has lung cancer?
asked by Sara Beth 
Physics
A 1230 N beam is attached to a vertical wall at one end and is supported by a cable at the other end. A 1910 N crate hangs from the far end of the beam. What are the magnitude of the horizontal and vertical components of the force that the wall exerts on
asked by Sahrish 
math
The ratio of the number of male students to the number of female students in a school is 3:8. How many students are there if there are 48 females?
asked by dell 
math
juanita bought a coat on sale for 35% off the regular price. The cost of the coat was $78 before tax. What was the original price of the coat?
asked by sam 
physics
a man m is at rest on a stationary flat car. the car can move without friction along horizontal rails. The man starts walking with velocity v relative to the car, work done by him is
asked by dinku 
Chem help
Calculate the pH of a solution containing 0.00001 moles of H3O per liter.
asked by Lindsey 
Canterbury Tales Theme Question
So this is the summary of my tale I have to do for a project, and I had a question about it. ?Download appListen to an overviewBuy this Lit Note The Canterbury TalesOriginal study guide for literatureBuy Book (US $5.99)Buy PDF (US $3.99)The Canterbury
asked by Allyson 
Statistics
Suppose the correlation between two variables is 0.57. If each of the yvalues is multiplied by 1, which of the following is true about the new scatterplot? It slopes up to the right, and the correlation is 0.57 It slopes up to the right, and the
asked by John 
physics
The maximum possible efficiency of a heat engine which exhaust its heat at a temperature of 46.0o is 39.0 percent. What is the minimum value of the temperature at which the engine takes in heat? (in oC).
asked by Erika 
Math  8th grade  Please help
I don't know the formula to figure this out. Charlie and Peter are driving around a racetrack. Charlie drives at an average speed of 108 miles per hour. Peter drives at an average speed of 99 miles per hour. Peter is given a head start of 12 miles. Charlie
asked by Chris 
Algebra 2 ..........
For the function P(t)=765(1.02)^t, what value is t when P(t) exceeds 1000? My answer: t=14
asked by Anonymous 
algebra
An investor invested a total of $500 in two mutual funds. One fund earned a 8% profit while the other earned a 4% profit. If the investor's total profit was $32, how much was invested in each mutual fund? The amount invested in the mutual fund that earned
asked by Samantha 
science
ICl2F+2: Calculate the maximum wavelength of electromagnetic radiation that is capable of breaking the weakest bond. Express your answer in meters. Bond energies (kJ/mol) are: II (150) FF (160) ClCl (240)
asked by lef 
Personal Dimension of Education
Select the sentence that has correct subjectverb agreement. 1. There are several forms that you need to complete when you adopt a pet. 2. There is several forms that you need to complete when you adopt a pet My answer is There are several forms that you
asked by Jackie 
HELP ! Algebra
Solve the quadratic equation by completing the square. (x^2 + 6x + 10 = 0)
asked by Robert 
Physics
A 170 pound man has to slide down a rope that can only support 150 pounds. How long will it take him to reach the ground 35 feet below if he keeps the rope from breaking?
asked by Talia 
AP U.S. History
How did the government under the constitution guarantee that people on the frontier would be loyal to it? What was the impact on Native Americans?
asked by Ben 
economics
The price of a wideget increases by 90%. What effect would we expect this to have on the equilibrium wage rate of workers who make widgets? Would this increase, decrease, or keep the wage rate the same?
asked by matt 
Personal Dimension of Educatio
Titles of works and company names should be treated as singlular nouns. For example: the Secret Life of Bees is a novel that was made into a movie last year. True or False. My answer is True
asked by Jackie 
writing
Can you proofread my writing? Real Men Truly Change What is forgiveness? Forgiveness is when you allow someone to be forgiven for doing something wrong to you or someone else. On February 21, 1988 at the Family Worship Center in Baton Rouge, La, a speech
asked by aaliayah 
Math
The length of a rectangle is three more than twice the width. If the width is five what is the perimeter?
asked by LP 
physics
A 170 pound man has to slide down a rope that can only support 150 pounds. How long will it take him to reach the ground 35 feet below if he keeps the rope from breaking?
asked by Talia 
Physics
A 170 pound man has to slide down a rope that can only support 150 pounds. How long will it take him to reach the ground 35 feet below if he keeps the rope from breaking?
asked by Talia 
chemistry
If 45 colonies grew on the filter and 1 mL of a 105 dilution of the sample was filtered, how many coliform bacteria were in 100 mL of the original sample?
asked by john 
math
Sin(2x)=2sin(x)cos(x) find the exact value in radians with 2sin^2(x)+sin^2(x)=0, i really do not get this question or even how to do this ive been trying to figure it out but cant
asked by john 
Physical Sci
John used a force of 300 N to push his younger brother in a wagon for 50m. How much work did John do?
asked by James 
Science Math
2) How much force was used to move a box 42m if 13,734 J of work was done on it? 3)If the same amount of work was dodne as in problem #2, and the force on the box was 121 N, how far would the box be moved?
asked by Milan 
phy science
A wave has a speed of 230 m/s and a frequency of 25 Hz. What is its wavelength?
asked by biq juciy 
College Algebra
In an assembly line of a factory, which produces networking switching hubs, two robots are utilized. The first one (A) is able to produce 40 microchips per hour, whereas the second one (B) produces 30 microchips per hour. For a total production of 400
asked by Marina 
Personal Dimension of Education
Select the sentence that has correct subjectverb agreement. 1. If anyone need to buy a new a laptop, give her or him my contact information. 2. If anyone needs to by a new laptop, give her or hm my contact information. My answer is number 1
asked by Jackie 
physics
Water (η = 1.00E3 Pa·s) is flowing through a horizontal pipe with a volume flow rate of 0.0153 m3/s. As the drawing below shows, there are two vertical tubes that project from the pipe. Assume that H = 0.0477 m and L = 0.670 m I know how to plug in
asked by Katherine 
PHYSICS!
An object of mass 154 kg moves in a smooth straight tunnel of length 2990 km dug through a chord of a planet of mass 3.19 × 10^24 kg and radius 1 × 10^7 m Find the eﬀective force constant of the harmonic motion. The value of the universal gravitational
asked by michelle 
Algebra
Jan can run at 7.5 m/s. On a race track Jan is given a 25m head start, and the race ends in a tie. How long is the track?
asked by Kevin 
Physics
A 170 pound man has to slide down a rope that can only support 150 pounds. How long will it take him to reach the ground 35 feet below if he keeps the rope from breaking?
asked by Talia 
math
Sin(2x)=2sin(x)cos(x) find the exact value in radians with 2sin^2(x)+sin^2(x)=0, i really do not get this question or even how to do this ive been trying to figure it out but cant
asked by john 
pre algebra
Scrambled digits. 91.4 x 63.8 equals 748.84?
asked by sue 
AP U.S. History
How did the French Revolution highlight the differences between the Federalists and the Republicans?
asked by Ben 
technology & society
An institution which controls the shape, price, use, and availability of a technology is called a:A. sponsor. B. Dominant Regulator. C. Monopolistic Maker. D. distributer.
asked by latisha 
Personal Dimension of Educatio
Select the sentence that has correct subjectverb agreement. 1. Applied mathematics was my major in college. 2. Applied mathematics were my major in college. My answer is 1
asked by Jackie 
8th grade math  Ms. Sue please
Charlie and Peter are driving around a racetrack. Charlie drives at an average speed of 108 miles per hour. Peter drives at an average speed of 99 miles per hour. Peter is given a head start of 12 miles. Charlie and Peter finish at the same time. How far
asked by Chris 
Personal Dimension of Educatio
Select the sentence that has correct subjectverb agreement. 11. Neither my dad nor my siblings want to go to the family reunion this summer. 2. Neither my dad not my siblings wants to go to the family reunion this summer. My answer is 1
asked by Jackie 
History
Type a short character sketch of a fictional Puritan named Justice Johnson based on what you have learned about the Puritans. Make certain that you describe how he dresses, how he lives, what he believes, how he spends his timein short, describe him so
asked by Tommy 
Personal Dimension of Educatio
Most singular nouns that end in "s" such as politics, news, measles take plural verbs. for example: The local news are a good source for community events. True or False.. My answer is False
asked by Jackie 
Math
Paige is making a garden in the shape of a square. The sides of the new garden are twice the length of the old one. If the side of the original is x, what is the area of the new garden in terms of x?
asked by LP 
science
A bullet with a mass of 7.11 g and a speed of 774 m/s penetrates a tree horizontally to a depth of 1.85 cm. Assume that a constant frictional force stops the bullet. Calculate the magnitude of this frictional force. Try energy considerations. Answer in
asked by jason 
physics
a 747 airliner reaches its takeoff speed of 170 in 35.0 .what is the magnitude of its average acceleration
asked by Anonymous 
math
Describe the use of the 10X10 grid to solve the following problem.Your telephone bill was $80 after a %25 increase. What was your bill before the increase?
asked by dell 
math
in a box of cookies one sixth of the cookies are broken. There are 28 more whole cookies than broken cookies. How many cookies are in the box?
asked by dell 
math
refer to a seven piece tangram: a. if the original square made by the seven tangram pieces has an edge length of 2, what are the edge lengths of the small square piece? b.the parallelogram is what percent of the original square made by the seven tangram
asked by dell 
physics
If a solid is stretched or compressed beyond the point that it can return to its original shape it has passed its
asked by cecilia 
precalc
F(x)= x^2+x12/ x^24 find the x and y intercepts and find x when f(x)=1
asked by Josie 
Thanksgiving writing
Can someone post some thanksgiving examples on why pilgrims should not eat turkey for thansgiving feas
asked by Celest 
science
At temperatures above 930 degrees Celsius, lead oxide (PbO) reduces lead sulfide (PbS) to form metallic lead (Pb) and sulfur dioxide (SO2). Write out the balanced chemical equation, using the smallest wholenumber coefficients.
asked by lef 
math
Charlie and Peter are driving around a racetrack. Charlie drives at an average speed of 108 miles per hour. Peter drives at an average speed of 99 miles per hour. Peter is given a head start of 12 miles. Charlie and Peter finish at the same time. How far
asked by Chris 
Physics
Initially 1.200 mol of an ideal gas in a container occupies a volume of 3.50 l at a pressure of 3.30 atm with an internal energy U1 = 547.2 J. The gas is cooled at a constant volume until its pressure is 1.80 atm. Then it is allowed to expand at constant
asked by Erika 
math
Therese Felser manages a grocery warehouse which encourages volume shopping on the part of its customers. Therese has discovered that, on any given weekday 70 percent of the customer sales amount to more than $ 100. That is any given sale on such a day has
asked by Andrew 
Statistics
start with X=100 and add four x values to make a samle of 5 data such that the standard deviation of these data equals 0
asked by Jerry 
math
What is e? I know it is Euler's constant and the natural number whatever but what is it?
asked by mushroomhelper 
Math
Use linear approximation to show that each function below can be approximated by the given expression when x is small i.) sinx = x ii.) e^x = 1+x
asked by Michael 
english
What is the meaning of tonto
asked by adewuyi 
trig
Given BC = 53 cm, BD = 62 cm, CD = 80 cm, ABC = 53°, and ACB = 66°, find the following. (Round your answers to the nearest whole number.) (a) the length of the chainstay, AC AC = cm (b) BCD BCD = °
asked by janice 
sci
What is the power of a 300 n force applied over 20 m fro 20 sec? What is the horsepower?
asked by Drake 
Math
Write each ratio as a fraction in simplest form. 5baseballs to 25softballs 1/5? 4tulips to 9daffodils 4/9? 2days out of 8days 1/4? 6 poodles out of 18dogs 1/3? 10 yellow eggs out of 12 colored eggs 5/6?
asked by Jerald 
math
Therese Felser manages a grocery warehouse which encourages volume shopping on the part of its customers. Therese has discovered that, on any given weekday 70 percent of the customer sales amount to more than $ 100. That is any given sale on such a day has
asked by Andrew 
math
if 24 students went to a museum and only 1/6 saw the exhibit how mand saw the exhibit
asked by Anonymous 
Chem help please
A solution is found to contain 1 x 104 OH− ions, determine the pH of this solution.
asked by Trevor 
advanced statistics
suppose a certain study habit is known to be 80% effective in improving the performance of students,,if 5 students with poor performance are trained to acquire the habit,what is the probability that exactly 4 will have an improved performance? more than 3
asked by anonymous 
advanced statistics
suppose the probability is 0.30 that a student taking an exam did not review. what is the probability,that among 6 students taking an exam, 5 did not review? less than or equal to 4 did not review?
asked by anonymous 
math
13yx=7 and 7y/2=x are parallel, neither or perpendicular lines
asked by Stacey 
geography
the conversion of old factories for new uses retooling, urban renewal, or urban pioneering? urban renewal?
asked by Katt13unknownchika 
Science
How much force was used to move a box 42m if 13,734 J of work was done on it?
asked by Jake 
sci
a car performs 40,000 j of work in 5 sec. what is the power of the car. what is the horsepower?
asked by Aj 
sci
What is the power of a 300 n force applied over 20 m fro 20 sec? What is the horsepower?
asked by Drake 
work
1. You are a member of Special Troop Battalion, 3d BCT, 10th Mountain Division. Your battalion will deploy to Iraq within six months. The battalion commander approved your unit’s METL. The METL identifies critical tasks for each platoon and now it is
asked by von 
algebra
Does 6+5x=44
asked by Annie 
MGT
Whatforces of influence that should be consider while identifying a problem?
asked by Yona 
Personal Dimension of Educatio
Select the sentence that has correct subjectverb agreement. 1. Everyone on the guest list are attending the dinner. 2. Everyone on the guest list is attending the dinner. My answer is 2
asked by Jackie 
math
Write an expression for the product of x and two times x, plus 7
asked by LP 
Science
How do I balance a combustion equation? (PLEASE TELL ME ANY SHORTCUTS)
asked by Matt 
Calculus II
Does the series ln/n^2 converge using the L'Hoptial's rule also. I know you can use the integral test but I have also seen others using the L'Hopital's rule on a very similar funciton ln/n^3 to see that it does converge.
asked by Ray 
math
Yuki's age is four years more than onefourth of Xena's age. Xena's age is 21 years and 6 months more than seveneighths of Yuki's age. How old are ena and Yuki?
asked by sam 
math
A rectangle has length of 2 3/4 m and a width of 4 2/3 m. A circle has a dia meter of 4.04 m. Which figure has the greater area?
asked by sam 
CALCULUS
Find the length of the curve: y=ln(1x^2), 0
asked by Sarah 
math
can you please help me 8+7r^3/2t^4r
asked by kiki 
mah
9x^0 (6x)^0 3x^4+8 when x=2 please help me
asked by kiki 
science
estimate the change in energy when solid rubidium reacts with gaseous diatomic chlorine molecules. Express your answer in units of kJ/mole
asked by lef 
English
Hello! How to present smoking as a topic to students? There are 22 students (17 year olds) and they are learning English for 3 years.So any kind of discussion has to be excluded. I would really like to come up with something interesting! At the end of the
asked by mark 
Science
What is the power of a 900 n force applied over a distance of 40 m for 45 sec? What is the horsepower?
asked by Bryan 
Personal Dimension of Educatio
Compound subjects those joined with and should take singular verbs. For example: the cd player and moon roof is included in the car's price. True or False. My answer is False.
asked by Jackie 
math
If x = 4, and y=x+2, what is y?
asked by epicmathfailure 
physical science
if 34,560 j of work was done with a force of 960 n, how far was the object moved?
asked by Bobby 
math
29.64acres=hectares?
asked by doris 
Geo 7th Grade
is increase of fish population due to acid rain?!?!?!?1 thanks ♥dino♥
asked by rawr... im a dinosaur.... rawr 
Calculus
y=arctan(sqrt(9x^21))^2 dy/dx=?
asked by Anonymous 
Math
For what value of x is the following undefined: X^2+4/x4
asked by LP 
math
(6x)^0
asked by kiki 
math
the question is 3x to the negative fourth power plus 8 when x equals 2 please help
asked by kiki