1. trig

a hedgehog wishes to cross a road without being run over. he observes the angle of elevation of a lamp post on the other side of the road to be 27 degrees from the edge of the road and 15 degrees from a point 10m back from the raod. How wide is the road??

2. Engineering Kinematic

The particle travels along the path defined by the parabola y=0.5(x^2). If the component of velocity along the x-axis is v=5t [m/s], determine the particle's distance from the origin and the magnitude of its acceleration when t=1s. The initial condition is

3. phy

A grinding wheel 0.62 m in diameter rotates at 2400 rpm. (a) Calculate its angular velocity in rad/s. rad/s (b) What are the linear speed and acceleration of a point on the edge of the grinding wheel? linear speed m/s radial acceleration m/s2

4. phy

A grinding wheel 0.62 m in diameter rotates at 2400 rpm. (a) Calculate its angular velocity in rad/s. rad/s (b) What are the linear speed and acceleration of a point on the edge of the grinding wheel? linear speed m/s radial acceleration m/s2

5. mathematics

it takes 12 men to make 12 tables in 9 hours. how long will it take 8 men to make 32 tables?

6. Chemistry

Did I answer these correctly? 1. What is the total number of principal energy levels or shells in an atom with an atomic number of 30? a. 3 b. 4 c. 5 d. 6 I choose b. 2. The electron configuration of an atom in the ground state is 2-4. The total number of

7. chemistry

0.5123 g KHP sample was dissolved in about 25 mL of distilled water, and titrated to the phenolphthalein endpoint with 28.75 mL of a sodium hydroxide solution. Calculate the molar concentration of the hydroxide solution

8. College Physics

A golf ball (mass 0.045 kg) is hit with a club from a tee. The plot shows the force on the ball as a function of time in milliseconds. One millisecond is 10-3 seconds. What is its speed right after the hit?

9. ALgebra

tom scores 83,88,75, and 90 on the first 4 tests in algebra. what does he need to get on the 5th test to have an average of 85?

10. chemistry

How many moles of O2 are needed to react with 2.90 moles C2H2

11. phy

An automobile engine slows down from 3500 rpm to 1100 rpm in 4.5 s. (a) Calculate its angular acceleration, assumed constant. rad/s2 (b) Calculate the total number of revolutions the engine makes in this time. rev I got answer for part a that is

12. Math - Derivative of a polynomial function(check)

The red squirrel population, p, in a neighborhood park can be modelled by the function p(t)= srqt(210t+44t^2), where t is time in year. a) Determine the rate of growth of the squirrel population at t= 2years Ans: find the 1st derivative and substitute 2 in

13. Math

Jim Tree borrowed \$1,000 at 10 percent for one year. He paid a \$45 processing fee and \$100 in interest. He calculated the APR to the nearest tenth.

14. Chemistry

The net ionic equation for ALL aqueous reaction of strong acids and strong soluble bases that form soluble salts is 1. the formation of H2O from H+ and OH−. 2. the formation of water from the ele-ments. 3. the formation of water and the corre-

15. Physics Honors

A car travels due east with a speed of 60.0 km/h. Rain is falling vertically with respect to the Earth. The traces of the rain on the side windows of the car make an angle of 45.0° with the vertical. Find the velocity of the rain with respect to the car

16. Math - Derivative of a polynomial function

The population, p in thousands of bacteria colony can be modelled by the function p(t)=200+20t-t^2, where t is the time, in hours, t is greater than or equal to zero. a) Determine the growth rate of the bacteria population at each of the following times.

17. chemistry

what is the empirical formula for a compound whose molecular formula is C2Cl6

18. Math - average rate problems(check + help)

The total cost, c, in dollars of operating a factory that produces kitchen utensils is C(x)=0.5x^2+40x+8000, where x is the number of items produced in thousands. a)Determine the marginal cost of producing 5000itmes and compare this with the actual cost of

19. Chemistry

In the reaction 2Mg + SnCl4 −> 2MgCl2 + Sn , how many electrons are involved in the conversion of SnCl4 to Sn? 1. three 2. one 3. four 4. two

20. teacher aide

when are children first developmentally ready to begin learning science

22. Chemistry

Write the net ionic equation for this reaction occurring in water: Sodium phosphate and calcium chloride are mixed to form sodium chloride and calcium phosphate. 1. No reaction occurs. 2. 2Na3PO4 + 3Ca2+ -> 6Na+ + Ca3(PO4)2 3. 2 PO3−4 + 3Ca2+ ->

23. Chemistry

NiF2(aq)+Fe2(SO4)3(aq) ==NiSO4 (aq) + FeF3 (s) balance each of the following chemical equations. Express your answer as a chemical equation. Identify all of the phases in your answer. Can help me refresh my memory ...

24. englsi

My english is very very bad ,please helpm me to fix this paragraph. To catch the king interest, every night she must come up with unique and fresh idea. Mercy and Wisdom is very important elements in her stories and how different characters of the stories

25. Chemistry

Given the following list from the activity series of metals (from most active to least active) K, Na, Al, Mn, Cr, Cd, Co, Pb, Hg which reaction would you NOT expect to occur? 1. All of the listed reactions will occur. 2. Na(s) +Mn2+(aq) -> Na+(aq) +Mn(s)

26. Chemistry

Chemistry equilibrium? Consider the reaction 2NO(g) + O2(g) = 2NO2(g) at 430C an equilibrium mixture consists of 0.020 mole of O2, 0.040 mole of NO, and 0.96 mole of NO2. Calculate Kp for this reaction given that the total pressure is 0.20 atm. I used

27. chem

Lithium hydride reacts with water as follows. LiH(s) + H2O(l) -->LiOH(aq) + H2(g) During World War II, U.S. pilots carried LiH tablets. In the event of a crash landing at sea, the LiH would react with the seawater and fill their life belts and lifeboats

28. chemistry

calculate the pressure,in atmospheres, of 2.00 mol helium gas in a 10.0-L container at 27 celcius? Please i don't understand any of this? help please?

questions reads as follows: sat scores around the nation tends to have a mean score around 500, a standard deviation of 100 points and are approximately normal distribution. a person who scores 600 on the sat has approximately what percentile rank within

if 28x^3-36x^2+4x is divided by 4x then the quotient will be

31. math

find a such that f(x)= ax2-4x+3 has a maximum value of 12

32. Manageral Economics (Economyst Only Please)

Bridget has a limited income and consumes only wine and cheese; her current consumption choice is four bottles of wine and 10 pounds of cheese. The price of wine is \$ 10 per bottle, and the price of cheese is \$ 4 per pound. The last bottle of wine added 50

33. phy

A centrifuge rotor rotating at 13,000 rpm is shut off and is eventually brought uniformly to rest by a frictional torque of 1.30 m·N. If the mass of the rotor is 4.80 kg and it can be approximated as a solid cylinder of radius 0.0710 m, through how many

34. physics

A 0.720 kg snowball is fired from a cliff 8.10 m high. The snowball's initial velocity is 14.2 m/s, directed 30.0° above the horizontal. (a) How much work is done on the snowball by the gravitational force during its flight to the flat ground below the

35. physics

A 506 g block is released from rest at height h0 above a vertical spring with spring constant k = 500 N/m and negligible mass. The block sticks to the spring and momentarily stops after compressing the spring 18.4 cm. How much work is done (a) by the block

36. CHEMISTRY

how many mls of glycerol (FW= 92.1; density=1.26g/ml) must be used to make 250ml of a 0.15 M solution

37. College Chemistry

an iron ore sample was dissolved in Hydrochloric acid the iron was obtained as Fe2+. The solution was titrated with 41.08 mL of a 0.458 M solution of Ce+. Calculate the mass of iron in the original ore sample.

38. physics

Here were two tricky questions. Please provide steps. Answers are not necessary (since these are practice questions for an exam). 1.) The centrifuge is a device in which a small container of material is rotated at a high speed on a circular path. Such a

39. Physics

A car mass of 1330 kg is traveling at 28.0 m/s. The driver applies the brakes to bring the car to a rest over a distance of 79.0 m. Calculate the retarding force.

40. Physics

A uniform solid sphere of mass M and radius R is rolling without sliding along a level plane with a speed v = 2.70 m/s when it encounters a ramp that is at an angle è = 20.4° above the horizontal. Find the maximum distance that the sphere travels up the

41. probability

A company's records indicate that on any given day, 1% of their day shift employees and 2% of the night shift employees will miss work. Sixty percent of the employees work the day shift. a. What percent of employees are absent on any given day? b. A

42. personification poem

for english class i have to write a poem personifying something. I chose to personify a picture in a picture frame. I am not at all good at poems and was wondering if you guys could read mine and tell me what changed i should make and if its really bad and

43. physical education

are the anatomical names for the following right?: skull-cranium shoulder blade-clavicle spine-sternum collar bone-scapula thigh bone-femur fingers-phalanges can you please check if the names are correct

44. physics

really confused, A 2kg box is sliding east at 50m/s on a frictionless floor when it collides with a 4kg box sliding east at 10m/s. After the collision, the 2 kg box is sliding east at 20m/s and the 4kg block is sliding east at 25m/s. Calculate the

45. math

find a such that f(x)= ax2-4x+3 has a maximum value of 12

46. geography

i am located between the great lakes and the gulf of st. lawrence

47. Chemistry

A mixture of 0.47 mole of H2 and 3.59 moles of HCl is heated to 2800C. Calculate the equilibrium partial pressures of H2 Cl2 and HCl if the total pressure is 2.00 atm. For the reaction Kp is 193 at 2800C. H2(g) +Cl2(g) = 2HCl (g) I know that I need to find

48. math

a car uses 25 litres of petrol to travel 200 miles. how many litres of petrol will the car use to travel 450 miles?

49. chem lab

hi im doing a post lab sheet for chem class. and im having a little trouble. i have: temperature 12.6 C -> 285.6 K Time 816 sec but im supposed to find 1/T(K) it looks like my classmate did this: 12.6 x 285.6 = 3598.56 however they gave me the response to

50. calc

Average daily temp,y, is y=45-23cos(2pi(x-32)/365), where x is time in days, x=1, corresponds to Jan 1 and y is temp in degrees F. Determine the period of the function. Determine critical numbers, over one period. Determine relative extrema, what does

51. English 2

This is my last exam, and I'm done with English! 'At different times in A Separate Peace the weather seems to signal a change in the atmosphere of the action. Make a list of three specific weather descriptions from the novel; Use chapter references along

52. chemistry

what is the equation for C6H12O6+NaOH+Cu(OH)2 C6H12O6+AgNO3+NH4OH AgNO3+NH4OH+ galactose when heated

53. Chemistry

3 M HCl solution was used to generate CO2 from the CaCO3 . What will be the effect on the value reported for the molar volume of CO2 if 6 M HCl was used instead (too high, too low, no difference)? Explain.

54. Chemistry

A 70.8mL sample of "wet" O2(g) is collected over water at 29.9 degrees Celsius at a barometric pressure of 743 mmHg. The vapour pressure of water at 29.9 degrees Celsius is 31 mmHg. What is the mole fraction of O2 in the gas collected? So i found the

55. Chemistry

If aqueous hydrofluoric acid is reacted with sodium hydroxide, which of the following substances are in the net ionic equation? 1. fluoride ion, hydronium ion, and water 2. fluoride ion, hydroxide ion, hydronium ion, and water 3. hydrofluoric acid, sodium

56. math

solve the simultaneous equations to find the coordinates of the point of intersection for the pair of lines of the simultaneous equations. Then check the answer by graphing the equations 3x-y=-4 2x-y=0

57. college chemistry

An electrical heater is used to add 19.50 kJ of heat to a constant-volume calorimeter. The temperature of the calorimeter increases by 4.50°C. When 1.75 g of butanol (C4H9OH) is burned in the same calorimeter, the temperature increases by 14.58°C.

58. math

Urban Community College is planning to offer courses in Finite Math, Applied Calculus, and Computer Methods. Each section of Finite Math has 40 students and earns the college \$40,000 in revenue. Each section of Applied Calculus has 40 students and earns

What is a good definition of mercantilism? I don't understand when all the definitions talk about economic systems of national wealth. Thank you!

60. physics

Four people, each with a mass of 72.7 kg, are in a car with a mass of 1110 kg. An earthquake strikes. The driver manages to pull of the road and stop, as the vertical oscillations of the ground surface make the car bounce up and down on its suspension

61. math

A builder needs to connect a partially built house to a temporary power supply. On the plan, the coordinates of the house are (50,114) and the power supply is at (147,82). what is the least amount of cable needed? why is it likely that the builder will use

62. Math

Okay so the question is: "Three people are cheering simultaneously. Measured individually, the cheers are 80dB, 80dB, and 50dB. What would the cheering measure totally? Use your knowledge of logarithms to solve." So the formula we were given a few days ago

63. Chemistry

When calcium oxelate is treated with an acidic solution of potassium permanganate, the following reaction occurs: CaC2O4(s) + MnO4-(aq) = Ca+2(aq) + CO2(g) + Mn+2(aq) Balance the equation.

64. algebra

Eric has twice as much money as Marcia, who has \$175 less than Laurel. But Laurel has as much money as Eric and Marcia have together. How much money does each person have?

65. chemistry

What about this question? Calculate the mass (g) of PbSO4 that will dissolve in 2000 mL of 0.0694 M K2SO4 solution. The equation represents the solubility process. PbSO4 (s) Pb2+ (aq) + SO42- (aq) Ksp = 1.7 x 10-8

a train moving west at a velocity of 15m/s is accelerated steadily to 17m/s over a 12 second period what is the acceleration of the train

67. algebra

an item on sale for 30% off costs \$179.99. what was the original price?

68. Foods

what is used to knead dough and to roll pastry ? what is used to cook some less tender meats,to steam puddings and to asselerate the cooking time of foods? what is used to sift flour before measuring? what kind of knife is used to very finely slice or

69. calculus

Locate the discontinuities of the function. y = 2/(1 + e^(1\/x))

70. statistics

use the normal distribution to approximate the desired probability. find the probability that in 200 tosses we will obtain at least 40 fives.

71. chemistry

What is the molarity of an unknown acid if 40.5 ml of the acid can be titrated to an end point by 20.5 ml of 0.2250 M NaOH?

72. statistics

sat scores around the nation tend to have a mean score of about 500, a standard deviation of 100 points and are approximately normal distribution. a person who score 600 on the sat has approximately what percentile rank within the population? show all

73. chem

A sample of nitrogen gas (N2) kept in a container of volume 13.3 L and at a temperature of 22.3°C exerts a pressure of 1.1 atm. Calculate the number of grams of gas present.

74. algebra

Mei's salary starts at \$16,000 per year with annual raises of \$1500. Janet's starting salary is \$19,300 with annual raises of \$950. After how many years will the two women be earning the same salary?

75. college chemistry

What volume (in Liters) of hydrogen must react to form 17.0L of ammonia according to the following balanced equation: N2(g) + 3H2(g) --> 2NH3(g) Assume an excess of N2 and that all are at the same temperature and pressure.

76. physics

A pair of blocks, one 3 times as massive as the other, are connected by a compressed spring. When the spring is released, the blocks fly apart. Compared to the heavier block, how many times faster does the lighter block accelerate?

77. chemistry

How many moles are there in 250cm3 0f 4M sodium chloride solution

78. College Physics

Some kid (mass 20 kg) jumps with a velocity of 3.2 m/s horizontally off some steps (height 0.55 m) onto his heavy duty skateboard (mass 3 kg, height 0.03 m), which is initially at rest. How fast will he be skating? I don't where to start.

79. Manageral Economics (Economyst Only Please)

In an article about the financial problems of USA Today, Newsweek reported that the paper was losing about \$ 20 million a year. A Wall Street analyst said that the paper should raise its price from 50 cents to 75 cents, which he estimated would bring in an

80. teacher aide curriculum content

what is a good way to motivate elementary students to learn math

81. geography

Which African countries does the Tropic of Capricorn pass through? My answer is the African countries of Namibia, South Africa, Mozambique, Botswana and Madagascar. Is this correct? My Mom said Madagascar is not an African country. I told her she is wrong

82. math

two trains leave at the same time from stations 284 miles apart, traveling toward each other at 33mph and 38 mph respectively. how long will it take them to meet?

83. RES 341

A sample of 300 is taken and the sample mean is computed to be 7.65 and the sample standard deviation is 5. Assume the data is ratio level. Compute the 95% confidence interval on the mean. Compute the 3.9% confidence interval on the mean Which confidence

84. algebra

The greater of two consecutive integers is 15 more than twice the smaller. Find the integers.

85. Science

Explain newtons first law of motion

86. Math

Question:Meg wants to install square tiles in a rectangular room. How can identifying common factors help her decide if any tiles will need to be cut? Use numbers to help you explain.

87. Geometry

Use the Law of Detachment to write a valid conclusion for the given information. 1.If two angles are supplementary, then their measures have a sum of 180. 2.Angle X and Angle Y are supplementary. -What do they mean when they ask me to write a valid

88. INTRODUCTORY ALGEBRA

FOR HOMEWORK I HAVE TO DO A NUMBER TRICK BY PICKING A NUMBER ADD 5 DOUBLE THE RESULT SUBTRACT 4 THEN DIVIDE THE RESULT BY 2 AND THE RESULT SHOULD BE THREE.THEN I HAVE TO EPLAIN WHY THE RESULT IS ALWAYS 3. I DON'T GET IT CAN YOU PLEASE HELP. IM ABOUT TO

89. U.S. Government

I'm struggling with answering this question and I would appreciate any help one could offer. I'm needing to answer the following question in paragraph form: Which one of these two philosophies do you think the Supreme Court should follow: judicial activism

90. Physics

A car (mass 880 kg) is traveling with a speed of 44 mi/h. A bug (mass 7.9 mg) is traveling in the opposite direction. What speed would the bug need in order to slow down the truck by one mile per hour in a big bug splash (i.e., final speed 43 mi/h)?

91. College Chemistry

if 5.25g of ice AT 0 c IS PLACED IN 25.63 G OF LIQUID WATER AT 28c, WHAT WILL BE THE FINAL TEMPERATURE OF THIS MIXTURE?

92. English

1) Minimize versus minimise. Which is UK English & which is US English? 2) After cleaning, all waste must be properly disposed of. Is this sentence acceptable?

93. physics

A large uniform block rests horizontally on two vertical supports(one support at the left end of the block and another at a distance from the other end) and has a weight hanging from its other end. The block has a mass of 100 kg and a length of 2 meters.

94. chemistry

Determine the density of methane (CH4) in g/L at 24.7oC and 1.1 atm ideal gas eqn: P = (rho)RT, where: pressure: P = 1.1 atm specific gas constant: R, R = |R / M, where |R = 0.0821 L-atm / K-mol and, molecular weightCH4: M = 0.016 kg/mol R = 0.0821/0.016 =

95. Acc/ Federal Taxation

If a taxpayer has AGI of \$35,000, how much of the following expense can he apply towards his itemized deductions? Medical Expenses \$3,500 Tax Preparation Fees \$500 Unreimbursed Employee Expenses \$2,000 Charitable Contributions \$1,000 Hint: Remember to

96. english

can someone give me some examples of minimal cues and lead in therapeutic listening responses?

97. price elasticity

In an article about the financial problems of USA Today, Newsweek reported that the pa-per was losing about \$ 20 million a year. AWall Street analyst said that the paper should raise its price from 50 cents to 75 cents, which he estimated would bring in an

98. chemistry

I need 500 ml of 0.10 m HCL solution. I have a 3.785 liter container of HCL at 31.45% concentration. How do I acheive my objective?

99. Manageral Economics (Economyst Only Please)

Wilpen Company, a price- setting firm, produces nearly 80 percent of all tennis balls purchased in the United States. Wilpen estimates the U. S. demand for its tennis balls by using the following linear specification: where Q is the number of cans of

100. chemistry

What volume (in Liters) of oxygen must react to form 17.0L of carbon dioxide according to the following balanced equation: 2CO(g) + O2(g) --> 2CO2(g) is this correct C G02 2

101. Biology 9

I need a topic for with this criteria.. !@#\$%^& the impact of a factor related to human activity that threatens the sustainability of a terrestrial or aquatic ecosystem OR Evaluate the effectiveness of government initiatives in canada and or the efforts of

102. English 2

Gene and Finny are drawn to each other and share some character traits, but they are also very different. First, list the characteristics that are unique to Gene or Finny. Then list the traits they share. So far I have: Gene- Envious, Smart, Insecure

103. CHEMISTRY

Which of the following gases will occupy the smallest volume at 300 K and 760 torr and why? 80 g diatomic oxygen 80 g methane 80 g hydrogen fluoride All gases will occupy the same volume

104. chem: study of kinetics

im supposed to find the slope= -EA/R = triangle y/triangle x = (y2-y1) ________/(x2-x1)____________ how do i do this? is it the same as the slope that excel gave me? i have information from 3 different groups, and i have 3 x's and 3 y's, how do i solve

105. math

find the equation of a line that passes through the origin and point (-3,6)

When two numbers are added together, the result is 45.Twice the greater number is six more than five times the lesser number. What are the numbers.

107. Physics

A 25 kg mass is on a level, rough surface where the force of friction is a constant 15 N. A horizontal applied force of 65 N acts on the mass. The mass is initially at rest. What speed does that mass have after being moved 2.0m?

108. statistics

find the range,standard deviation, and variance for the following sample date: 98,2,53,61,15,87,63,63,91,29,96,79,93,40,5,62 *please show all calculations for confirmation. thank you very much. i just want to double myself. thank you.

109. phyisc

Write and balance the reaction for the complete combustion of methanol, CH3OH. (Type your answer using the format CO2 for CO2. Use the lowest possible coefficients.) 1CH3OH + 2 3 ¨ 4 5 + 6H2O

110. probabilityv

A school's administrators are concerned about absenteeism at their school and the e ect it has on students' grades. The following data were compiled, based on a sample of students. Student's Absent Medium Absent Grade Infrequently Absent Frequently Low 1 9

111. Acc/Federal Taxxtion

During the current year, Deborah Baronne, a single individual, paid the following amounts: Federal income tax \$10,000 State income tax \$4,000 Real estate taxes on land in France \$1,500 Real estate taxes on land in U.S. \$1,700 State sales taxes \$2,000 State

112. Chemistry

Atom A- 6 protons, 6 electrons, 7 neutrons Atom D- 6 protons, 6 electrons, 8 neutrons Atom X- 7 protons, 7 electrons, 8 neutrons Atom Z- 8 protons, 8 electrons, 9 neutrons Which two atoms are isotopes of the same element? a. A and D b. A and Z c. X and D

113. physics

really stuck, a 90 kg skier has 140 KJ of total mechanical energy when he is at a height of 120m above the bottom of the hill. calculate the skiers kinetic energy. calculate his speed?

114. physics

If you have a 900cm2 plane mirror 45 cm in front of you and can just see the full length of an 8.5m flagpole behind you how far are you from the flagpole?

115. economics

Bridget has a limited income and consumes only wine and cheese; her current consumption choice is four bottles of wine and 10 pounds of cheese. The price of wine is \$ 10 per bottle, and the price of cheese is \$ 4 per pound. The last bottle of wine added 50

116. Accounts

From the following Balance Sheets of Sriramco, prepare (a) Statement of Changes in Working Capital, and (b) Funds Flow Statement: Balance Sheet of Sriramco as on 31st December… Assets Goodwill Land and Buildings Plant Investments Book Debts Stock Cash in

117. math

A coordinate grid is used on the plan of a new housing development. fibre optic cable is being laid with a micro-tunnelling machine. THE CABLE WILL LINK POINTS BEGINNING at A and ending at D . if one unit on the grid represents 2.5m, how much cable is

118. geometry

In the triangle ABC, angle a=46 degrees and angle B=83 degrees. How large is the exterior angle at C?

119. algebra

a 3 1/2 foot piece of rope is cut into two pieces. one of these pieces is 8 inches shorter than the other. how long are the pieces?

120. everyone

can i just ask why some people who post a question get the answers and others get told they don`t have the work done for them its not fair. i know its a site where people get HELP with their homework but shouldn`t everyone be treated the same?

121. College Chemistry

Write the electron configuration for Se using the noble gas core format.

122. algebra

The lengths of the sides of a triangle are consecutive even integers. Find the length of the longest side if it is 22 units shorter of the perimeter.

123. computer science

Mercy Hospital decides to install a netwrok to serviceits various wards and operating rooms and emergency room that will give them scheduling capibilities in real time. The ER and OR have less than 10 computer total but need preference to the server that

124. Physics

The escalator that leads down into a subway station has a length of 28.5 m and a speed of 1.6 m/s relative to the ground. A student is coming out of the station by running in the wrong direction on this escalator. The local record time for this trick is 11

125. Science

Explain newtons first law of motion

How is E-business , grandma's treats doing in profit

127. math

You operate a gaming Web site, where users must pay a small fee to log on. When you charged \$4 the demand was 510 log-ons per month. When you lowered the price to \$3.50, the demand increased to 765 log-ons per month. (a) Construct a linear demand function

128. Math/Vectors

I need help on a homework problem. "Determine a vector equation for the line perpendicular to 4x-3y=17 and through point (-2,4). The answer in the book is given as [x,y]=[-2,4]+t[-4,3].Isn't the normal to the scalar equation [4,-3] and wouldn't this be the

129. chemistry

A mass of 2g of magnesium wire is oxidized with 150 ml of 0.5 mole/l (HCL solution) write the half rxn and the balanced equation of the overall rxn

roberta sold fifty tickets for the school play. Roberta sold ten more student tickets than adult tickets. How many tickets did roberta sell?

131. College Chemistry

A Cylinder is filled with 1.20 mol of He(g) at 25 C under ambient pressure of 0.966 atm. The gas in the cylinder is then heated with 1.430 KJ of heat, and the piston is raised by the expanding gas under the constant ambient pressure. Calculate the

132. chem

A 31.2 cm3 bubble of air at 1.4 atm pressure is subjected to a new pressure of 3.9 atm. What will be the new volume (cm3)? Assume constant temperature. THe answer I got was 11.2 cm3 is this correct

133. College Chemistry

if 5.25g of ice AT 0 c IS PLACED IN 25.63 G OF LIQUID WATER AT 28c, WHAT WILL BE THE FINAL TEMPERATURE OF THIS MIXTURE?

134. Acc/ Federal Taxation

If a taxpayer has AGI of \$35,000, how much of the following expense can he apply towards his itemized deductions? Medical Expenses \$3,500 Tax Preparation Fees \$500 Unreimbursed Employee Expenses \$2,000 Charitable Contributions \$1,000 For example, what is

135. Physics

A 4.52 kg block slides down a smooth, fric- tionless plane having an inclination of 31◦ . The acceleration of gravity is 9.8 m/s2 . Find the acceleration of the block. Answer in units of m/s2.

136. English ErR

Although she is good story teller but her purpose of tales is not to amuse and entertain the shaharyar. She has messages behind every tale and she want to teach the king how to overcome from his past life and she wants to bring him back in the real world,

137. Chemistry

Which of the following is best described as an acid-base reaction? 1. 2HgO -> 2 Hg + O2 2. NH3 + H2O -> NH+4 + OH− 3. KCl + NH4NO3 -> KNO3 + NH4Cl 4. Ca + 2H2O -> Ca(OH)2 + H2 5. NaCl + AgNO3 ->NaNO3 + AgCl How do u tell if it is a salt or not?

138. economics

Wilpen Company, a price- setting firm, produces nearly 80 percent of all tennis balls purchased in the United States. Wilpen estimates the U. S. demand for its tennis balls by using the following linear specification: where Q is the number of cans of

139. Accounts

The following details relates to the two machines X and Y: Machine X Machine Y Cost Estimated Life Estimated salvage value Working Capital required in the beginning Rs. 56,125 Rs.56,125 5 years 5 years Rs. 3,000 Rs. 3,000 Rs.10,000 Rs. 20,000 Annual income

140. Easy Biology

why cells within the same organism have the same ADN, but look and function differently?

141. math

points P(4,12), Q(9,14), and R(13,4)are the three vertices of a rectangle. a. find the coordinates of the fourth vertex, S. b. write a short description of how you found the coordinates of S. c. find the lengths of the diagonals of rectangle PQRS. COMMENT

142. chemistry

A volume of 0.285 L of a gas at STP weighs 0.537 g. Calculate the molar mass of the gas? PV=nRT where R = 0.0821. Therefore, (1)(0.285) = n(0.0821)(273). i got 275.9 is this correct?

143. Qoutes

What can be a qoute for scary sleepovers?

144. accounting

You can invest in 10 corporate bonds paying 7 percent interest 20 conservative stocks that pay substantial dividends(typically 5 percent of the stock price every year) and 30 growth oriented-technology stocks that pay no dividends. Analyze each alternative

what banch of government created the changes thomas jefferson was writing adout

146. molecular biology

What's the purpose when experiments use H1/H5 depleted nucleosome as a model? What kind of characteristics do that nucleosome has? Thanks!

147. Math

How do I solve: -9x + 2x to the third power +8x -12x to the third power

148. college chemistry

Manometers can use liquids other than mercury to measure small pressure differences. On a day when the barometric pressure is 761.7 torr, a water manometer, connected between the atmosphere and a glass bulb containing a sample of helium gas has a height

149. math

Find the intersection of the line through (0, 1) and (4.4, 2) and the line through (1.9, 3) and (5.3, 0). (Round your answers to the nearest tenth.) (x, y) =

150. Chem 1000

A Cylinder is filled with 1.20 mol of He(g) at 25 C under ambient pressure of 0.966 atm. The gas in the cylinder is then heated with 1.430 KJ of heat, and the piston is raised by the expanding gas under the constant ambient pressure. Calculate the

151. MATH

roberta sold fifty tickets for the school play. Roberta sold ten more student tickets than adult tickets. How many tickets did roberta sell?

roberta sold fifty tickets for the school play. Roberta sold ten more student tickets than adult tickets. How many STUDENT tickets did roberta sell?

153. statistics

for a particular sample of 77 scores on a psychology exam the following results were obtained: first quartile=44 third quartile= 71 standard deviation=6 range=45 mean= 64 median= 57 mode = 92 midrange=60 answer each of the following: a) what score was

154. math

what three positive integers a, b, and c satisfy a^n+b^n=c^n, where n is a number greater than two

155. principles of chenistry

What mass of calcuim chloride is needed to prepare 3.650L of 1.75 M solution?

156. Calculus

find the polar equation for hyperbola eccentricity of .8 and a vertex of (1,pi/2)?

157. Acct/ Fwederal Taxation

Itemized Deductions: During 2009 Sam had incurs the following deductible expenses: state income taxes \$2,300,local property taxes \$2,000, medical expenses \$800,and charitable contributions \$1,500. Sam is aingle with no dependents and has a \$35,000 AGI for

158. Foods

I think I have mostly all the answers to my questions though I don't know if they are right. Any ways my last question is: what is used to cook vegetables and fruits, and to make sauces which do not contain milk? Please try to answer my other questions as

159. marketing

The company you work for is considering changing its applicant testing process. Your supervisor has asked you to research testing methods and make your recommendation. This proposal will be submitted to the Vice President for review and consideration.

160. maths

a fasrmer has 46 animals.He has fewer 6 sheep than pigs. how many pigs does he have?

161. English-The Hunger Games

I have to create a magazine that would be published about the games(capitol) -Magazine format which I am doing is : * Regular issue during the games. CRITERIA: Create an authentic product true to the details of the novel. INCLUDE THE FOLLOWING: *min. 6

162. science

my teacher told me and my group to pick a lab we want to do? we will be working on this for 7months what can we do that wont be boring for this 7months

A motorized canoe is pointed [N20degreesW] in a river. If has the capability to move at 5 m/s and filmed moving at 7.6 m/s, what is the velocity of the river?

164. stats

Microbes in a certain colony exposed to radiation have a 1/6 chance of being mutated. a. If ten microbes from the colony are sampled, what is the probability that exactly 4 will be mutated? b. If ten microbes from the colony are sampled, what is the

165. statistics

Find the range, standard deviation, and variance for the following sample data: 98, 2, 53, 61, 15, 87, 63, 63, 91, 29, 96, 79, 93, 40, 5, 62 *please show calculations step by step so that i can compare my work. thank you very much. i know that i am off

asked by mary, can't figure out calculation, please show your calculations for all questions listed above a-e
166. Physics

A car (mass 880 kg) is traveling with a speed of 44 mi/h. A bug (mass 7.9 mg) is traveling in the opposite direction. What speed would the bug need in order to slow down the truck by one mile per hour in a big bug splash (i.e., final speed 43 mi/h)?

167. history

id be very very grateful if someone could help me answer these questions. describe one way in which hitler broke the treaty of versailles in the years1933-1936 (worth 2 points) is it because Hitler agreed not to send his troops to the rhineland? briefly

168. physics

Here were two tricky questions. Please provide steps. Answers are not necessary (since these are practice questions for an exam). 1.) The centrifuge is a device in which a small container of material is rotated at a high speed on a circular path. Such a

169. science

a block of aluminium at room temp is 20cm when heated it increases to 25cm when back to room tempthe volume returns to20cm why does this happen

170. algebra

two planes take off from an airport at the same time and head in opposite directions at 260 mph and 275 mph respectively. in how many hours will they be 1605 miles apart?

171. finance

Write a 200- to 300-word paper comparing long- and short-term financing. Describe situations in which each type of financing would be used. Post in your Assignment Section.

172. college

Liver alcohol dehydrogenase (ADH) is a nonspecific enzyme. Its normal substrate is ethanol but it will oxidize other primary alcohols like methanol. Methanol produces formaldehyde which is quite toxic and can lead to blindness. A dog ingested about 36 ml

173. math

a coast guard ship left the port at 30 mph. four hours later a helicopter was dispatched at 90 mph to intercept the ship. how long will it take the helicopter to catch the ship?

X f(x) 0 .25 1 .20 2 .15 3 .30 4 .10 Is it prpbsbility distribution valid? Explain and list the requirement for a valid probability distribution Calculate the expected value x Calulate the variance of x calculate the standard deviation of x

175. ms sue-history

sorry me again for my first question describe one way in which hitler broke the treaty of versailles in the years 1933-1936.. did hitler send his troops to the rhineland when he was told not to?

176. math

sarah has dimes and nickels which total \$1.65. the number of nickels she has is 3 less than the number of dimes. how many of each does she have?

177. math

a coast guard ship left the port at 30 mph. four hours later a helicopter was dispatched at 90 mph to intercept the ship. how long will it take the helicopter to catch the ship?

178. math

two planes take off from an airport at the same time and head in opposite directions at 260 mph and 275 mph respectively. in how many hours will they be 1605 miles apart?

179. english-poetry

I need some help in finding some good one stanza (4 lines) poems. Tried googling but my googling skills are not very good. Maybe one of you have a good list? Thanks

180. phi 445

In your opinion, is better to have a true capitalists type of market or do you think that there should be a combination of markets blended together to make up the overall market for our nation?

181. phi 445

Some critics say that there is a problem with "burnout" with the due care theory. In your opinion, what does that mean?

182. physics

Two cars, A and B, are traveling in the same direction, although car A is 174 m behind car B. The speed of A is 25.6 m/s, and the speed of B is 18.6 m/s. How much time does it take for A to catch B?

183. chemistry

A 16.5 cm3 bubble under the ocean at 2.1 atm and 12.5oC surfaces to 1.0 atm and 22.1oC. What is the new volume (in cm3)?

184. chemistry

-182 degree c, -68 degree c, 943 degree c, 115 degree c, 0 degree c, which is the melting point of an ionic solid?

Hi im emy. What is a word problem for 4*-5?

186. English

As I know a character after which a book is named is an eponymous character,is there a particular word for a symbol after which a book is named? If there is such a word, The Scarlet letter in Hawthorne's The Scarlet Letter, the Mockingbird in Lee's To Kill

187. chemistry

iatrochemistry -what is it? -who created it? cant use wikipedia :s thanks!

188. Finanical

which financial ratio do you think would be most beneficial for a firm today? Why?

189. philo

Lawyer: My client, television commentator Jonas Cassell, was fired by the network that employed him for criticizing one of the network’s major sponsors. However, Cassell’s comments were said off the record at a private party, and only became public

190. English

What concerns does Omi and Winant’s theory of “racial formation” share with Bell Hooks’ critique of postmodernism? How might Omi and Winant’s concept address hooks’ concerns about what is lost when we reject essential identity?

191. chem

If the wet H2 gas occupies a volume of 6.84 L, how many moles of H2 are formed?

192. Algebra 2

can someone show me how to do it step by step please! Use a graph and table to solve each system. check your answer {y+x=5 {3x-5y=-1

193. VA & US History

What would john dickinson think of the Boston Tea Party?

194. math

alex and yvonne are spending the day ata apark. they have \$50 to spend between them. How many combinations of activities can Alex and yvone do for under \$50?

195. tere

what did i do wrong? i need to find lowest vapor pressure. a 0.13 m FeCl3 b 0.50 m sucrose c 0.24 m NaNO3 d 0.15 m Na2PO4 so i solved. a 4 x 0.13 = 0.52 b 1 x 0.50 = 0.50 c 5 x 0.24 = 1.2 d 7 x 0.15 = 1.05 i chose C but the answer is A. did i do something

196. Phyics

Balance the following equations? a) Fe(OH)2 + 2O2 + 3H2O ¨ Fe(OH)3 (b) 5Sr + 6H2O ¨ 7Sr(OH)2 + 8H2 (c) 9Al + 10Fe3O4 ¨ 11Al2O3 + 12Fe (d) 13Pb(NO3)2 ¨ 14PbO + 15NO2 + 16O2 (e) 17O2 + 18N2H4 ¨ 19H2O2 + 20N2 (f) 21C4H10 + 22O2 ¨ 23CO2 +

197. english

identify five therapeutic listening and verbal responses does that phrase mean 5 of each or those two add up to be 5

198. social studies

I need a brief summury of the four staged of transformations learning cycle

200. english

How can I fix this sentence? some of the questions I asked him are “Tell me reasons why did you end up staying at the hospital?” and “Tell me more about the pain in your right leg?”

201. english

How do I fix this sentence? some of the questions I asked him include “Tell me reasons why did you end up staying at the hospital?” and “Tell me more about the pain in your right leg?”

202. math

a leach-free area for dogs is to be created in a field behind a recreation centre. what length of fencing will be required, if the plans show an irregular pentagonal area with vertices at (2,0), (1,6), (8,9), (10,7), and (6,0)?( one unit represents 10m).

203. medical terminology

the period of time when the uterus returns to its normal size is the? A) luteal phase B)menarche C)puerperium D)ovulation

How can I get dose from exposure? Could you provide an example of it? Thank you

205. Pre Calc

If f(x) = 2x − 1 and g(x) = x^2 + 5, find (f of g)(−3) and (g of f)(2). Can anyone help ?

206. Math

Find the work done by a 15 N force in the direction of the vector (1,2,2) when it moves a particle from O(0,0,0) to P(1,-3,4) and then from P to A(7,2,5) Can somebody explain to me how to do this question i don't understand it.

207. naturaral sciences

How do we design and experiment that proves that the water forming on the outside of a can comes from air?

208. math

twelve posts stand equidistant along the stadium. starting at the first post, a runner reaches the eight post in 8 seconds. if he runs at a constant rate, how many seconds are needed to reach the twelfth post?

209. Jean

the saturation point or the solubility of salt X in water is 27 g per 100 mL of solvent used. if a person adds 29 g of this salt to a 100 Ml of solvent what type of solution would form? shouldnt the answer be supersaturated? since saturation point is 27g?

210. physics

need some help, A ball with an initial angular velocity of 20.0 rads /s and a rotational inertia of 0.4kgm rolls uphill with an acceleration of -4.00 rad/s . Calculate the net torque acting on the ball. Calculate the angular displacement after 5.00 s.

211. science

my teacher told me and my group to pick a lab we want to do? we will be working on this for 7months what can we do that wont be boring for this 7months

is referred and introduced are the same

213. CHEMISTRY

iatrochemistry -what is it? -who created it? (facts about him/her)

214. Accounts

The following is the Trial Balance of a trader as at 31st December, 2001: Debit Balances Rs. Credit Balances Rs. Stock (1-1-2001) Sales returns Purchases Freight and carriage Rate, Rent etc. Salaries and wages Sundry debtors Bank Interest Printing and

215. parenting

how do i make an inspector's checklist for a daycare facility

216. Western Civilization

What methods did the various leaders (19th century) use to foster a sense of national pride in their respective countries? How do these methods compare with the revolutions of 1848?

217. MS SUE HISTORY

SORRY I only wanted some help where i could get some information to help answer the questions i know you don`t do assignments for us. thanks

218. Jean

the saturation point or the solubility of salt X in water is 27 g per 100 mL of solvent used. if a person adds 29 g of this salt to a 100 Ml of solvent what type of solution would form? shouldnt the answer be supersaturated? since saturation point is 27g?