# Questions Asked onNovember 16, 2012

1. ## HELP !!! Algebra 2

15. What is the solution of the linear-quadratic system of equations? {y = x^2 + 5x - 3} {y - x = 2}

asked by Robert
2. ## 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
3. ## 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
4. ## 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
5. ## 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.
6. ## 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
7. ## 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
8. ## 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
9. ## chemistry

0.4324 g sample of a potassium hydroxide-lithium 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
10. ## 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
11. ## 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
12. ## 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
13. ## 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
14. ## 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
15. ## 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
16. ## 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
17. ## 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
18. ## 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
19. ## trig

A 52-foot 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
20. ## 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
21. ## Calculus

The half-life of Radium-226 is 1590 years. If a sample contains 100 mg, how many mg will remain after 4000 years?

asked by Anonymous
22. ## 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
23. ## 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
24. ## 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
25. ## 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
26. ## 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
27. ## 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
28. ## chemistry 104

estimate the enthalpy change for each of the following reaction: a) H2C=O(g)+HCl(g .....> H3C-O-Cl(g) b)H2O2(g)+2CO(g).....> H2(g)+2CO2(g) c)3H2C=CH2(g).....> C6H12(g) (the six carbon atoms form a six-membered ring with two H atoms on each C atom)

asked by oluchi
29. ## 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
30. ## 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
31. ## 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
32. ## 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
33. ## 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
34. ## 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
35. ## 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
36. ## 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
37. ## 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
38. ## 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
39. ## 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
40. ## 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
41. ## 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
42. ## 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
43. ## 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
44. ## 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
45. ## 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
46. ## 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
47. ## social studies

which of the following statements is supported by the information in the map? ONE) australia is self-supporting 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
48. ## 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
49. ## science

It takes 3.38 J of work to stretch a Hooke’s-law 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
50. ## chemistry

a 0.01M aqueous NaOH has a hydroxide concentration of ---- M

asked by florence
51. ## chem

how much heat is required to vaporize 34.8g of water at 100 degrees celcious?

asked by law-rece
52. ## algebra

20+2x/5-x For what value of x is the rational expression below equal to zero?

asked by myra
53. ## 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
54. ## 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
55. ## 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 minute-by-minute changes in stock prices.

asked by kathrine
56. ## 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
57. ## 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
58. ## books

Ambrose Biercs Could someone that has read the story check my work? 1. The gray-clad 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
59. ## 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
60. ## physics

A 5-kg 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
61. ## math

what is 14.76 rounded to the nearest hundredth?

asked by B
62. ## 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
63. ## psychology

Cross-cultural 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
64. ## 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
65. ## 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
66. ## 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
67. ## 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
68. ## 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
69. ## 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
70. ## 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
71. ## 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
72. ## 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
73. ## 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
74. ## 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
75. ## 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
76. ## 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
77. ## 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
78. ## does anyone know probability????

The digits 2, 3, 4, 7, and 8 are each used once in a random order to form a five-digit number. What is the probability that the resulting number is divisible by 4? Express your answer as a common fraction.

asked by epicmathfailure
79. ## 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
80. ## 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
81. ## 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
82. ## 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
83. ## 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
84. ## geography

he kind of economy that was created in Pittsburgh is called a. post-industrial. c. post-modern. b. commodity-based. d. twenty-first century.

asked by Katt13unknownchika
85. ## 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
86. ## 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
87. ## 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
88. ## 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
89. ## 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
90. ## math

a wheel makes 9 3\10 revolutions per minute. if it rotates for 85 minutes . How many revolutions does make ?

asked by noor
91. ## Chemistry

Calculate the pH of a solution at 25.0 °C that contains 1.94 × 10-10 M hydronium ions.

asked by Josh G.
92. ## 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
93. ## 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
94. ## 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
95. ## Math

The area of a circus ring is about 1,385 square feet. What is the circumference of the ring?

asked by Chris
96. ## 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
97. ## 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
98. ## Physics

A 13.6-m 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
99. ## 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
100. ## 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
101. ## 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
102. ## 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
103. ## math

each day, Jason walks to his office at a constant rate. one third of the way he passes a bank and three-fourths 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
104. ## 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
105. ## 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
106. ## 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
107. ## 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
108. ## 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
109. ## Math

i am a number between 50 and 60. one of my factors is 28. qhat number am I?

asked by Lizzy
110. ## 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
111. ## 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
112. ## 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
113. ## 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
114. ## 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
115. ## science

Estimate the 4th ionization energy of beryllium (Be). Express your answer in Joules (J/atom).

asked by hi
116. ## Math

Which expression is equal to log243

asked by Morgan
117. ## 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
118. ## 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
119. ## 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
120. ## 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
121. ## math

Find the equation of the line that passes through the points (2/3, -5/4)and (-3, -5/6). Write the answer in slope-intercept form and standard form with integer coefficients. Thank you.

asked by daniel
122. ## 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
123. ## ecoomics

If the multiplier is 4, a \$10 billion increase in autonomous investment will cause a

asked by donald
124. ## 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
125. ## 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
126. ## 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
127. ## 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
128. ## 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
129. ## 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
130. ## 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
131. ## Chem help

Calculate the pH of a solution containing 0.00001 moles of H3O per liter.

asked by Lindsey
132. ## 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
133. ## Statistics

Suppose the correlation between two variables is -0.57. If each of the y-values 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
134. ## 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
135. ## 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
136. ## 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
137. ## 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
138. ## 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: I-I (150) F-F (160) Cl-Cl (240)

asked by lef
139. ## Personal Dimension of Education

Select the sentence that has correct subject-verb 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
140. ## HELP ! Algebra

Solve the quadratic equation by completing the square. (-x^2 + 6x + 10 = 0)

asked by Robert
141. ## 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
142. ## 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
143. ## 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
144. ## 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
145. ## 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
146. ## 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
147. ## 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
148. ## 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
149. ## chemistry

If 45 colonies grew on the filter and 1 mL of a 10-5 dilution of the sample was filtered, how many coliform bacteria were in 100 mL of the original sample?

asked by john
150. ## 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
151. ## 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
152. ## 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
153. ## 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
154. ## 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
155. ## Personal Dimension of Education

Select the sentence that has correct subject-verb 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
156. ## physics

Water (η = 1.00E-3 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
157. ## 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
158. ## 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
159. ## 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
160. ## 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
161. ## pre algebra

Scrambled digits. 91.4 x 63.8 equals 748.84?

asked by sue
162. ## AP U.S. History

How did the French Revolution highlight the differences between the Federalists and the Republicans?

asked by Ben
163. ## 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
164. ## Personal Dimension of Educatio

Select the sentence that has correct subject-verb agreement. 1. Applied mathematics was my major in college. 2. Applied mathematics were my major in college. My answer is 1

asked by Jackie
165. ## 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
166. ## Personal Dimension of Educatio

Select the sentence that has correct subject-verb 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
167. ## 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 time--in short, describe him so

asked by Tommy
168. ## 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
169. ## 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
170. ## 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
171. ## physics

a 747 airliner reaches its takeoff speed of 170 in 35.0 .what is the magnitude of its average acceleration

asked by Anonymous
172. ## 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
173. ## 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
174. ## 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
175. ## 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
176. ## pre-calc

F(x)= x^2+x-12/ x^2-4 find the x and y intercepts and find x when f(x)=1

asked by Josie
177. ## Thanksgiving writing

Can someone post some thanksgiving examples on why pilgrims should not eat turkey for thansgiving feas

asked by Celest
178. ## 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 whole-number coefficients.

asked by lef
179. ## 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
180. ## 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
181. ## 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
182. ## 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
183. ## math

What is e? I know it is Euler's constant and the natural number whatever but what is it?

asked by mushroomhelper
184. ## 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
185. ## english

What is the meaning of tonto

asked by adewuyi
186. ## 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
187. ## sci

What is the power of a 300 n force applied over 20 m fro 20 sec? What is the horsepower?

asked by Drake
188. ## 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
189. ## 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
190. ## math

if 24 students went to a museum and only 1/6 saw the exhibit how mand saw the exhibit

asked by Anonymous
191. ## Chem help please

A solution is found to contain 1 x 10-4 OH− ions, determine the pH of this solution.

asked by Trevor
192. ## 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
193. ## 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
194. ## math

13y-x=7 and 7-y/2=x are parallel, neither or perpendicular lines

asked by Stacey
195. ## geography

the conversion of old factories for new uses retooling, urban renewal, or urban pioneering? urban renewal?

asked by Katt13unknownchika
196. ## Science

How much force was used to move a box 42m if 13,734 J of work was done on it?

asked by Jake
197. ## 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
198. ## sci

What is the power of a 300 n force applied over 20 m fro 20 sec? What is the horsepower?

asked by Drake
199. ## 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
200. ## algebra

Does 6+5x=44

asked by Annie
201. ## MGT

Whatforces of influence that should be consider while identifying a problem?

asked by Yona
202. ## Personal Dimension of Educatio

Select the sentence that has correct subject-verb 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
203. ## math

Write an expression for the product of x and two times x, plus 7

asked by LP
204. ## Science

How do I balance a combustion equation? (PLEASE TELL ME ANY SHORTCUTS)

asked by Matt
205. ## 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
206. ## math

Yuki's age is four years more than one-fourth of Xena's age. Xena's age is 21 years and 6 months more than seven-eighths of Yuki's age. How old are ena and Yuki?

asked by sam
207. ## 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
208. ## CALCULUS

Find the length of the curve: y=ln(1-x^2), 0

asked by Sarah
209. ## math

can you please help me 8+7r^3/2t^4r

asked by kiki
210. ## mah

9x^0 (6x)^0 3x^-4+8 when x=2 please help me

asked by kiki
211. ## 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
212. ## 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
213. ## 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
214. ## 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
215. ## math

If x = 4, and y=x+2, what is y?

asked by epicmathfailure
216. ## 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
217. ## math

29.64acres=-----hectares?

asked by doris
218. ## Geo 7th Grade

is increase of fish population due to acid rain?!?!?!?1 thanks ♥dino♥

asked by rawr... im a dinosaur.... rawr
219. ## Calculus

y=arctan(sqrt(9x^2-1))^2 dy/dx=?

asked by Anonymous
220. ## Math

For what value of x is the following undefined: X^2+4/x-4

asked by LP
221. ## math

(6x)^0

asked by kiki
222. ## math

the question is 3x to the negative fourth power plus 8 when x equals 2 please help

asked by kiki