1. You flip a coin 30 times and get heads 11 times, so the chance of getting heads is eleven over thirty . Is this an example of theoretical or experimental probability? (1 point) theoretical experimental 2. You have made 3 out of 10 of your last free

2. Math

A bag contains 9 tiles numbered 1 to 9. P(4) one-ninth = experimental; the result is found by repeating an experiment. experimental; the result is based on the number of possible outcomes. theoretical; the result is found by repeating an experiment.

3. algebra graphing

according to some students, what is the true purpose of homework?

4. statistics

A mail order company has 8% success rate. If it mails advertisements to 600 people, find the probability of getting less than 40 sales.

5. Math

Find the circumference of the circle. Round to the nearest tenth. The middle of the circle is 44mm

6. Chemistry

In a zinc-copper cell, Zn | Zn+2(1M) || Cu+2(1M) | Cu, which electrode is negative? a. Cu(s) b. Zn(s) c. Zn+2(aq) d. Cu+2(aq) Its A or C. Not sure. Please help.

12. What balances charges that may build up as reduction and oxidation occur in a voltaic cell? *the salt bridge one of the half-cells the electrolyte solutions the moving electrons 13. What is the electrode in the center of the most common dry cell made

8. statistics

the mean annual salary for employees at a company is 36,000. at the end of the year, each employee receives a 1,000 bonus and a 5% raise( based on salary)what is the new annula sala

9. statistics

The ages of five randomly chosen cars in the parking lot are determined to be 7,9,3,4 and 6 years old. If we consider this sample in groups of 3, what is the probability of the true mean falling between 5.5 and 6.5?

10. AP CHEM HELP

When NH3 is added to solid Hg2Cl2, some of the mercury ions are oxidized and some are reduced. A reaction where the same substance is both oxidized and reduced is called a disproportionation reaction. Write equations for each of these half-reactions. HELP

11. Area of Triangle

Find the missing dimension of a triangle: height: 15 ft area: 285 ft squared

12. physics

The figure below shows three circuits, each consisting of a switch and two capacitors, initially charged as indicated. Let qL represent the charge on the left-hand capacitor in each circuit. The switches in all circuits are then closed.

13. Chemistry

The question is: what is the ratio [NH3/[NH4+] in an ammonia/ammonium chloride buffer solution with pH= 10.00? (pKa for ammonia=9.25) When working the problem, I tried to solve it a bit backwards, in that I plugged in each of the multiple choices I was

14. Area of triangles

Aubrey is painting a mural of an ocean scene. The triangular sail on a sailboat has a base of 4 feet and a height of 6 feet. Aubrey will paint the sail using a special white paint. A can of this paint covers 10 square feet. How many cans of white paint

15. Physics 203

A 5m long diving board of negligible mass is supported by two pillars. One pillar is at the end of left of the diving board, the other is 1.50m away. Find the forces exerted by the pillars when a 90kg diver stands at the far end of the board.

16. geometry

Which description does NOT guarantee that a trapezoid is isosceles? A. congruent bases B. congruent legs C. both pairs of base angles congruent D. congruent diagonals

17. Statistics

Given a study of 9804 overweight or obese subjects with preexisting cardiovascular disease and/or type 2 diabetes. Subjects randomly assigned to subitramine (4906 subjects) or a placebo (4898 subjects) in a double-blind fashion. Primary outcome was

At which electrode does oxidation occur in a voltaic cell? anode only cathode only *both anode and cathode either anode or cathode, depending on the metal Thank You.

19. physics

1)An elastic material has a length of 36cm when a load of 40N is hung on it and a length of 45cm when a load of 60N is hung on it. The original length of spring is? 2)A force of 100N stretches an elastic spring to a total of 20cm. If an additional force of

20. precalculus

Find cos(t) where the terminal ray of the angle t radians in standard position passes though the point (-4,-3).

21. physics problem!!

If the water molecules in 5.70 g of water (H2O) were distributed uniformly over the surface of the Earth, how many such molecules would there be on 1.40 cm2 of the Earth's surface? -Molar mass Hydrogen gas(H2)=2.02 g/mol -Molar mass Oxygen gas (O2) = 32.0

22. Math

You have 2 pairs of shorts, 2 pairs of shoes, 2 shirts how many combinations could you wear

23. Physics

A circuit consists of a self inductor of L=0.003 H in series with a resistor R1=5 Ohm. Parallel to these is a resistor R2=10 Ohm. A battery of V0=9 volt is driving the circuit. Current has been running for 10 minutes. (a) How much energy (in Joules) is now

24. home work

A framed picture has length 50 cm and width 40 cm . The picture itself has area 1344 cm^2. How far is it from the edge of the picture to the edge of the frame if thid didtance is uniform around the picture ?

25. physics

a player kicks a soccer ball from ground level and sends it flying at an angle of 30 degrees at a speed of 28 m/s. what is the maximum height attained by the ball? Round the answer to the nearest tenth of a meter.

26. algbra 1

Name the property the equation illustrates. –5 + (8 + 10) = (–5 + 8) + 10

27. math

Emma weighed 6 pounds, 9 ounces when she was born. If her weight doubled by the time she was six months old, how much did she weigh then?

28. physics

a load 500N is raised 0.2m by a machine in which an effort of 150N moves 1m. what is the work done on the load?

29. social studies

Referencing Vladimir Lenin, "What is To Be Done?" (1902) Why do you think it was left to the “bourgeois intelligentsia” to transform the quest for working class rights into a philosophy?

30. chemistry

calculate the pH of a 0.50 m solution of HCN. Ka for HCN is 4.9*10^-10 (The chemical equation for this.)

31. MATH

A random sample of state gasoline taxes (in cents) is shown here for 12 states. Use the data to estimate the true population mean gasoline tax with 90% confidence. Does your interval contain the national average of 44.7 cents? 38.4 40.9 67 32.5 51.5 43.4

32. chemistry

How do I calculate the theoretical yield of a catalytic hydrogenation? I have the #s, I just have no idea how to apply it. It's 1-Octene --H2PtCl6--> n-Octane.

33. maths

Using the prime factor method find the square root of 31.36

34. physics 203

The figure shows a 1.50kg block at rest on a ramp of height, h. When the block is released, it reaches the bottom of the ramp and moves across a surface that is frictionless except for one section of width 10cm that has a coefficient of kinetic friction

35. ecology

Ten breeding pairs of rabbits are introduced onto an island having no natural predators and a good supply of water and food. What will most likely happen to the rabbit population? 1. It will decrease and then increase indeﬁ- nitely. 2. It will die out

36. physics

In one mole or 18 grams of water, the total negative charge of all the electrons is: a. zero because its electrically neutral. b. less than one C c. almost 100,000 C. d. almost one million C. e. none of these

37. Physics

Two chunks of ice are sliding on a frictionless frozen pond. Chunk A, with mass mA=5.0kg, moves with initial velocity vA1=2.0m/s parallel to the x-axis. It collides with chunk B, which has a mass mB=3.0kg and is initially at rest. After the collision, the

38. Physics

Two Balls of masses mA = 45 grams and mB = 65 grams are suspended as follows: both Balls are hanging by a 30 cm string and are vertically parallel to each other. The lighter ball is pulled away to a 66 degree angle with the vertical and is released,

39. Base of a parallelogram

Find the height of a parallelogram with base 9.44 meters and area 70.8 square meters.

40. social science statistics

a professor was curious to whether the students in a very large class she was teaching who turned in their first scored differently from the overall mean on the test.The overall mean score on the test was 75 with a standard deviation of 10;the score were

41. Chemistry

fumes were allowed to escape from the crucible. (what is the composition of the fumes )

Write a chemical equation that shows how acid rain H2SO3 was produced from SO2 gas and water in a zip sealed bag? My chem. teacher never explained how to do this and I have several other questions on this type of subject. If you could help me out it would

43. math

Adult tickets for a play cost \$19 and child tickets cost \$17. If there were 36 people at a performance and the theatre collected \$646 from ticket sales, how many children attended the play?

44. Algebra

Answer the following quadratic function f(x)= x^2 + 6x - 16 a)What is the vertex (h,k)of f? b)What is the axis of symmetry? c)What are the intercepts?

45. Math

What will the graph look like for a system of equations that has no solution? A. The lines will be perpendicular. B. The lines will cross at one point. C. Both equations will form the same line. D. The lines will be parallel. I think it is D..?

46. chemistry

When 86.7 g of water at a temperature of 73 °C is mixed with an unknown mass of water at a temperature of 22.3 °C the final temperature of the resulting mixture is 61.7 °C. What was the mass of the second sample of water? (Specific heat of water 4.184

47. social studies

In referrencing Lenin's "What is To Be Done" Lenin is here calling for unity among socialist thinkers, emphasizing that criticisms made by socialist thinkers against one another’s thoughts strengthen the enemy (bourgeois ideology”). Put in other words,

48. Physics 203

A block with mass of 5.0kg is suspended from an ideal spring having negligible mass and stretches the spring 0.20m to its equilibrium position. A) What is the force constant of the spring? B) The spring is then stretched 0.80m from its equilibrium position

49. Physics-

-Steam at 100 ¡ãC is mixed with 166.4 g of ice at ¨C32.8 ¡ãC, in a thermally insulated container, to produce water at 44.6 ¡ãC. Ignore any heat absorption by the container. -Cwater = 4186. J/(kg ¡ãC) -Cice = 2090. J/(kg ¡ãC) -Lf,water = 3.33

50. UOG

An initial investment of \$12,000 is invested for 2 years in an account that earns 4% interest compounded quarterly. Find the amount of mnoey in the account at the end of the period.

51. Chemistry

I'm reviewing for a test and I'm on Le Chatelier's principle. Decreasing the temperature of an exothermic reaction shifts the equilibrium to the right? I understood this weeks ago but now I can't remember. Wouldn't decreasing the temperature cause there to

52. Math

The profit (in millions of dollars) from the sale of x million units of Blue Glue is given by p= .7x-25.5. The cost is given by c= .9x +25.5 (a) Find the revenue equation. (b) What is the revenue from selling 10 million units? (c)What is the break-even

53. Math

A recipe for fruit punch calls for 2 1/2 c of orange juice, 1 1/3 c of pineapple juice, and 1 3/4 c of soda water. If June makes 4 times the recipe, how many cups of fruit punch will she have?

54. Physics

1) A circular disk 0.20m in diameter starts from rest and accelerates with constant angular acceleration to an angular acceleration to an angular velocity of 210 rad/s in 10.00s. Find the angular acceleration and the angle which the disk has turned in

55. Physics

Calculate the water pressure at the base of the Hoover Dam. The depth of water behind the dam is 220

56. Chemistry

How long does it take (in minutes) for light to reach Jupiter from the Sun, a distance of 8.258 × 108 km?

57. Algebra

A small painting has an area of 400 cm^2. The length is 4 more than 2 times the width. Find the dimensions of the painting. Solve by completing the square. Round answers to the nearest tenth of a centimeter.

58. Gr 12 Chem

Given: N2 + 3H2 = 2NH3 + 92.5 KJ, what is the delta h of f for NH3?

1. The thermal energy of an object is _____. (1 point) its potential energy its average kinetic energy its potential energy minus its kinetic energy its kinetic energy plus its potential energy Thanks, jessica :)

60. Macroeconomics

The money supply in Freedonia is \$200 billion. Nominal GDP is \$800 billion and real GDP is \$400 billion. Assuming that velocity is stable, if real GDP grows by 10 percent this year, and if the money supply does not change this year, what is the change of

61. algebra

write a polynomial that represents the sum off an odd integers 2n+1 and the next two consecutive odd integers

62. Chemistry

Which of the following result in buffered solutions when equal volumes of the two solutions are mixed? a.) .1 M HCl and .1 M NH4Cl b) .1 M HCl and .1 M NH3 c.) .2 HCl and .1 M NH3 d.) .1 M HCl and .2 M NH3 By def. I know that a buffed solution is made from

63. Math

A bicycle trail is 7miles and 880 yards long.How many total yards is the bicycle trail

64. Social Studies

1.What is a savanna? A savanna is a tropical or subtropical woodland ecosystem 2.What would you expect to find if you visited a savanna in Africa? Animals,grass,trees,plants 3.Why do you think so many animals live on a savanna? There's more grass and water

65. math

In a manufacturing process, each item leaving an assembly line will be examined by two inspectors: A and B individually. Based on past experiences, Inspector A detects 60% of the defective items. If the defective items are not detected by Inspector A, 90%

66. health

if health care cost continue to rise, insurance companies fear that

67. Chemistry

A 0.750 g sample of an unknown solid is dissolved in 100 mL of water and acidfied with 25 mL of 3 M H2SO4 then titrated with a 0.0200 M KMnO4 solution. If the unknown solid requires 12.5 mL of the KMnO4 solution to reach the endpoint, what is the % sodium

68. physics

A wave with an amplitude of 1.94 m interferes with a second wave with an amplitude of 0.85 m. What is the largest resulting wave that could occur if these two waves destructively interfere?

69. math

The profit (in millions of dollars) from the sale of x million units of Blue Glue is given by p= .7x-25.5. The cost is given by c= .9x +25.5 (a) Find the revenue equation. (b) What is the revenue from selling 10 million units? (c)What is the break-even

70. chemistry

find the mass in grams of a molecule of aspirin c9h8o4

71. physics

The car is travelling along the road with a speed of v  (300 / s) m/s, where s is in meters. Determine the magnitude of its acceleration when t = 3 s if t = 0 at s = 0. ( ans: a = 1.28 m/s2).

72. english

How many fish do you want to catch?" The fishing guide asked us. is the T in the capitalized

73. Probabilities

In a cookie jar, there are 6 chocolate cookies and 8 oatmeal cookies. I take out the cookies one at a time and proceed to eat them. The probability that the 7th cookie that I eat is a chocolate cookie is a/b, where a and b are positive coprime integers.

74. Physics

A baseball is thrown from the rood of a 27.5m tall building with an initial velocity of magnitude 16.0m/s and directed at an angle of 37 degrees above the horizontal. A) Using energy methods and ignoring air resistance, calculate the speed of the ball just

75. accounting

Jan Nab is the sole owner of Deer Park, a public camping ground near the Lake Mead National Recreation Area. Jan has compiled the following financial information as of December 31, 2010. Revenues during 2010—camping fees \$140,000 Market value of

76. physics

Two Bals. of masses mA = 45 grams and mB = 65 grams are suspended as shown. The lighter ball is pulled away to a 66 degree angle with the vertical and released: ----------------------------- /| | - /è| | | / | | | 30 cm / | | | mA | | | mA mB - where è =

77. English

Write a 75-150 word essay detailing your previous writing experience. Use the following questions to help you to think about your role as a writer: •In what type of environment do you do your best writing? •How would you characterize your writing? Has

78. chemistry

Aspirin, C 9 H 8 O 4 , slowly decomposes at room temperature by reacting with water in the atmosphere to produce acetic acid, HC 2 H 3 O 2 , and 2-hydro x ybenzoic acid, C 7 H 6 O 3 (this is why old bottles of aspirinoften smell like vinegar):C 9 H 8 O 4 +

79. math

A population of animals oscillates between a low of 1098 on January 1 (t = 0) and a high of 2344 on July 1 (t = 6). (a) Find a formula for the population, P, in terms of the time, t, in months.

80. chemistry

In the experiment you have added 50.0 mL of Ni(H2O)6 2+ to the calorimeter. To this you add 5.0 mL of ethlylenediamine and measure the change in temperature of the solution as the reaction proceeds. The temperature increases by 3.4 oC. Calculate the

81. use the given zero

Use the given zero to find the remaining zeros of the function. f(x)=x^3-2x^2+9x-18;zero;3i Enter the remaining zeros of f =

82. life orientation

what are the human and enviromental factors that cause ill-health?

83. physics

Blood takes about 1.50 s to pass through a 2.0-mm-long capillary. If the radius of the capillary is 5.00 um and the pressure drop is 2.60 kPa, calculate the viscosity of blood

84. College Chemistry

You weigh a sample of a monoprotic unknown acid and dissolve it in 50.00 mL of distilled water. Exactly half of this solution is titrated with Sodium Hydroxide to the phenolphthalein end point. The pH of the other half of the original solution is measured

85. Chemistry

If the temperature of 150.0g of water increased from 23.3C to 44.8C, how much heat was absorbed

86. chemistry

An automobile tire contains air at a pressure of 200. kPa and 25°C. The tire and its air heat up during traveling. If the pressure increases to 250. kPa but the volume remains the same, what is the temperature of the air inside the tire?

87. Statistics

Length of stay in a chronic disease hospital of a certain patient is 60 days with a standard deviation of 15. If it is reasonable to warrant an approximately normal distribution. Of lengths of stay find the probability that a randomly selected patient from

88. Physics

A package is thrown down a curved ramp as shown in the figure. The package moves from A to B through a quarter-circle with radius R=3.00m. The mass of the package is 25.0kg. The package starts from rest at point A and there is no friction. A) Find the

89. Chemistry equation

Write a correctly balanced series of chemical equations to describe the stepwise protonation of carbonate ion. Na2CO3 with HCl

90. Chemistry

Calculate volume of 6MHCL required to prepare a 250 ml of a 0.15MHCL solution??

91. Chemistry

Calculate volume of 6MHCL required to prepare a 250 ml of a 0.15MHCL solution??

92. Chemistry

Okay, I feel like this question should be really easy because it's a multiple choice question but how do you figure it out?? I'm completely drawing a blank. Consider the following equilibrium N2O4(g) 2NO2(g) Kc = 4.8E-3 Which set of concentrations

93. psychology

In the article "Conditioned emotional reactions" by John B. Watson and Rosalie Raynor., Explain the initial pairing of the bar and the rat in terms of learning through classical conditioning What are unconditional stimulus (US) conditional stimulus (CS)

1. Which of the following is an example of density? (1 point) ice floating on top of a river convection currents that cause wind oil spill cleanup all of the above 2. What type of property is density? (1 point) chemical property size-independent physical

95. Calculus

The unit selling price p (in dollars) and the quantity demanded x (in pairs) of a certain brand of women’s shoes are given by the demand equation p(x) = 100e^-0.0001x f or 0 _< x _< 20,000 a. Find the revenue function,R. (Hint: R(x)= x(p(x)), since the

96. Physics

Calculate the water pressure at the bottom of the 110--high water tower

97. Physics

HELP!!! Consider an airplane with a total wing surface of 140 . At a certain speed the difference in air pressure below and above the wings is 3.0 of atmospheric pressure.Find the lift of the airplane

98. math

If 6 more than 8 times a number equals 30, what's the number?

99. physics

A 17-kg sled is being pulled along the horizontal snow-covered ground by a horizontal force of 34 N. Starting from rest, the sled attains a speed of 2.9 m/s in 9.9 m. Find the coefficient of kinetic friction between the runners of the sled and the snow

100. physics

An underwater micriphone is used to record sounds emitted by porpoises. The minimum intensity level the instrument can record is 30.9dB. Assuming a porpoise emits sound at a rate of 0.0603J/s, what is the maximum distance at which the animal will still be

101. viscosity of blood physics

Blood takes about 1.50 s to pass through a 2.0-mm-long capillary. If the radius of the capillary is 5.00 um and the pressure drop is 2.60 kPa, calculate the viscosity of blood thanks in advance

102. Statistics

In his management information systems textbook,Professor David Kroenke raises and interesting point:"If 98% of our market has Internet access,do we have a responsibility to provide non-Internet materials to that other 2%?Suppose that 98% of the customers

103. math

A math contest consists of ten problems.Three points are given for each correct answer. One point is deducted for each incorrect answer. Andy answers all the problems and scores 18 points. How many correct answers does he have?

104. chemistry

When 86.7 g of water at a temperature of 73 °C is mixed with an unknown mass of water at a temperature of 22.3 °C the final temperature of the resulting mixture is 61.7 °C. What was the mass of the second sample of water? (Specific heat of water 4.184

105. science questions true or false!

5. Air is a good conductor of heat. (1 point) true false 6. When you hold a ball above the ground it has kinetic energy. (1 point) true false 7. A good refrigerant must have a low boiling point. (1 point) true false

106. physics

five joules of work are needed to shift .5 c of charge from one place to another. the potential differences between the places is

107. chemistry

How many grams of dichloromethane result from reaction of 1.60 of methane if the yield is 48.8 ?

108. Chemistry

At what temperature does 150 mL of n2 at 300 K and 1.13 atm occupy a volume of 550 mL at a pressure of 1.89 atm?

109. Computer (Visual Basic)

You are in the process of selecting the BackColors and ForeColors for you new application. When you originally learned to use Visual Studio, you were only aware of one of the palettes that was available to you, but your developer colleague informs you that

110. accounting

On April 25, 2010, Bullseye Company purchased all of the outstanding common stock of Vista Company, paying \$14,000,000. The book values and fair values of Vista's assets and liabilities acquired are shown below in dollar amounts: Accounts Book Value Fair

111. Math

A bag contains 4 blue, 4 red, and 4 green marbles. Four marbles are drawn at random from the bag. How many different samples are possible which include exactly two red marbles?

112. Math

15-(12(divided by)2)+(-3x4)

113. alegebra

the perimeter of a basketball court is 268 feet. the area is 4200 ft2. find the dimensions. using quadractics

114. physics

An underwater micriphone is used to record sounds emitted by porpoises. The minimum intensity level the instrument can record is 30.9dB. Assuming a porpoise emits sound at a rate of 0.0603J/s, what is the maximum distance at which the animal will still be

115. Urgent Help needed in PHYSICS!

A spherical balloon is inflated to a diameter of 20.0 cm. Assume that the gas in the balloon is of atmospheric pressure (101.3 kPa) and is at a temperature of 20.0 ¡ãC. It is then taken by a diver 15.0 m under the sea. The temperature of the seawater at

116. Math

Every time Mr. Cold born throws a ball of paper in the garbage can, the probability the ball goes in the cans is 3/4. What is the probability he misses 2 times in a row? Please show all work. Please help I don't understand probability

117. Math

The teams ratio of games won to games played was 9 to 11. If the team played 66 games, how many did the team win? Explain your answer.

118. physics - viscosity of blood homework question

Blood takes about 1.50 s to pass through a 2.0-mm-long capillary. If the radius of the capillary is 5.00 um and the pressure drop is 2.60 kPa, calculate the viscosity of blood not sure how to approach this. any help is appreciated!

119. american history

For revolutionaries like Sam Adams, what term embraced a way of life, a core ideology, and an uncompromising commitment to liberty and equality.

120. physics 203

Water (p=1000kg/m^3) enters a pipe on the ground with an inside diameter of 2cm at a pressure of 4x10^5 Pa. Then a 1-cm diameter pipe leads the water to a height of 5m above the ground. The flow speed at the inlet is v1=1.5m/s. A) Find the flow speed at

121. vocab

Aunt Lorna ( conferred, balked) when the waiter at the seafood restaurant told her that the dinner special-the"catch of the day"-was \$41.00. balked

122. Algebra

Answer the following quadratic function f(x)= x^2 + 6x - 16 What is the axis of symmetry?

123. rational zeros theorem

Use the rational zeros theorem to find all the real zeros of the polynomial function. Use the zeros to factor f over the real numbers. f(x)=25x^4+26x^3+126x^2+130x+5 Find the real zeros x= Use the real zeros to factor f f(x)=

124. Math

A bag contains 4 blue, 4 red, and 4 green marbles. Four marbles are drawn at random from the bag. How many different samples are possible which include exactly two red marbles?

125. science 3 questions!!

2. A device that can be used both for cooling and heating is a _____. (1 point) heat engine compressor heat pump vaporizer 3. All objects emit _____ radiation. (1 point) electromagnetic kinetic thermal solar 4. Fast food restaurants keep food hot with

126. ECONOMICS

Among perfect competition, monopolistic competition, oligopoly, and monopoly, how would you classify the markets for each of the following drinks ? Tap water Bottled water Cola Beer

127. physics

An underwater micriphone is used to record sounds emitted by porpoises. The minimum intensity level the instrument can record is 30.9dB. Assuming a porpoise emits sound at a rate of 0.0603J/s, what is the maximum distance at which the animal will still be

128. math

All varieties of a certain brand of cookies are \$3.50 A person buys peanut butter and chocolate chip cookies. Write an expression that tepresents the total cost.

the total cost of producing x units of toys is C(x)=110-4x+〖.02x〗^2. a.find the marginal cost b. if 50 toys are manufactured, what is the rate of change of the total cost? c.what is the amount in peso of the actual cost of manufacturing the 51st toy?

130. Science

Person weighing 650N lies on a bed of nails,each nail has area of 1m2 Assume 4Nm^-2 pressure is painful what is the smallest number of nails they could lay on and not be hurt

131. physics

A square loop (side L) spins with angular frequency ω in field of strength B. It is hooked to a load R. Write an expression for current I(t) in terms of B,L,R,ω and t (enter omega for ω). (b) How much work is done by the generator per revolution?

132. math algebra

the perimeter of a basketball court is 268 feet. the area is 4200 ft2. find the dimensions. using quadratics

133. Algebra

Use the given zero to find the remaining zeros of the function. f(x)=x^3-2x^2+9x-18;zero;3i Enter the remaining zeros of f =

134. Math

What is the probability of tossing two coins and having them both show heads? Show all work. Please help I don't understand this.

135. Physics

Two satellites, X and Y, orbit a planet in nearly circular orbits. Satellite X takes 20 days to complete one orbit, while satellite Y takes 160 days. If satellite X has orbital radius 1.0r, what is the orbital radius of satellite Y?

136. physics

Two point charges, +3.27 µC and -6.15 µC, are separated by 1.08 m. What is the electric potential midway between them?

137. english

In a fit of anger after an argument, I __________ out all of my friend's letters and pictures.

138. science

A hydraulic jack is needed to raise an object with a force of 4000 N to a height of 3 metres above the ground. Will the jack do the job? (Answer after working through the rest of the question. I would really appreciate it if someone would please help me

139. Math

I need some help. A biologist finds that the population of a certian type of bacteria double seach half-hour. An initial culture has 60 bacteria. 1. What is the population after 3 hours? 2. How long will it take for the number of bacteria to reach 983,040?

140. math

1. Pat needed more brushes. Pat knew that the Paint Spot was 7/10 of a kilometer away. Sandy said, "People's Paint Store is 3/10 of a kilometer closer." How far away was People's Paint Store? 2. Sandy brought a large bottle of soda to work. It was 3/4

141. english

How would i write a thesis sentence for a biography on C.S. Lewis?

142. Physics

Consider the process of charging a parallel plate capacitor with circular plates of radius R=5 cm separated by a distance d=0.2 cm. At some time t1, the capacitor is being charged with a current I=0.04 A. Consider a point P on the plane which is equally

143. chem

From the following list, identify the ions that are more easily reduced than H+. Fe2+(aq) Al3+(aq) Cr3+(aq) Ag+(aq) Sn4+(aq)

144. Solve the polynomial inequality

Solve the polynomial inequality and graph the solution set on a real number line. Express the solution set in interval notation. x^3+x^2+4x+4

145. life orientation

three environmental health hazards that cause ill health,crises ,and disasters within your community or any other community within south africa and globally

146. chemistry

calculate the L of 5.00 M HCI required to neutralize 500.0 mL of 1.00 M Ca (OH)2

147. physics

An underwater micriphone is used to record sounds emitted by porpoises. The minimum intensity level the instrument can record is 30.9dB. Assuming a porpoise emits sound at a rate of 0.0603J/s, what is the maximum distance at which the animal will still be

148. PHYSICS - Waves

Can someone tell me how to get the answer to this question? Just a formula would be great. It's on my physics study guide for my unit test. Sound waves with a wavelength of 2.5 m are traveling 7.5 m/s. How many waves will pass a microphone in 10.0 s?

149. PHYSICS - Waves

Can someone tell me how to get the answer to this question? Just a formula would be great. It's on my physics study guide for my unit test. If 3 sound waves pass a microphone in 4.0 s while traveling 5.0 m/s, what is the wavelength of the waves? (6.67 m)

150. algebra

factorise the left hand side of the equation xxx+7xx-21x-27=0 and the roots are

151. math

find p such that 3x^p(4x^2p+^3+2x^3p-2)=12x^12+6x^10

152. Chemistry

One cubic meter of ideal diatomic gas is expanded from 150oC, 8 bar isothermally to the final volume. The gas is then cooled at constant volume until 50oC and 3 bar. Calculate the total change in work, heat, enthalpy, and internal energy.

153. how many particles...?(Physics

A person takes a breath as deep as possible by exhaling as far as possible (leaving a volume of 1.170 L in their lungs), and then slowly inhaling to increase their lung volume by 4.580 L. His body temperature is also 37.64 ¡ãC. (i)How many particles of

154. Physics

Please help! I've tried solving this with trig but I can't seem to figure out what I've been doing wrong. Two positive point charges, each of which has a charge of 2.3 × 10−9 C, are located at y = +0.60 m and y = −0.60 m. A)Find the magnitude of the

155. Physical geography

what is the fractional scale of oregon? and how do you figure it out. Thanks

156. Chemistry

When looking at a titration curve, I have to determine which is false and I have it narrowed down to two options: The initial starting point on the titration curve is where pH depends only on [HA]0 or The finial point on a titration curve the pH depends

157. Science 2 questions

how and where is electricity generated in British Columbia, Canada? describe how most of the electricity is generated in England or another country. But it must be different than what occurs in B.C. Please help, thanks:)

SOLVE THE FOLLOWING EQAUTION BY COMPLETING THE SQUARE: 3. xsquared - 8x - 10 = 0 xsqaured -8x=10 xsquared-8x+(8/2)sqaured=10+(8/2)sqaured xsquared-8x+16=26 Answer: xsqaured-8x+16=26 WHAT DID I DO WRONG?

159. Statistics

There is a mean of 30.23 lbs with a standard deviation of 13.84. Calculate the probability that randomly selected mother in North Carolina gained

160. science

describe the path of light rays from a leaf to the retina

161. maths - two dimensional motion

The problem I am trying to solve is from AQA Mechanics M1 and is as follows: An object is moving in a plane. At time t=0, it is at the origin, O, and moving with velocity u. After 2 seconds it is at A where OA = -2i - 4j. After a further 3 seconds it is at

162. Calculus

Find the equation of the line tangent to f(x) = xe^-x at the point where x = 0. What does this tell you about the behavior of the graph when x = 0?

163. math

3xsquared + 27 = 5 3xsquared -5x = -3xsquared + 6 SOLVE

164. Math

Andrew has 12 coins, all dimes and nickels, and they add up to \$1.00. How many nickels does he have?

165. Pre algabra

write 121 to 4 feet as a ratio in lowest terms

166. precal

write as single log -4ln(x+1) + 9ln(x)

167. math

if two squares have the same area of 2500 meters squared,when combined what is the perimeter?

168. math

If the distance between location A to B is straight east 10 km. then from B to C is Nw 18KM How far would you be from point C to A. Would you not need to more information then this to calculate this answer?

169. Calculus

1. In a certain country, the percentage of the population relocating to a new town is given by the following function: p(t) = 20.6e^-0,009t,where 0 _< t _< 52. Time is zero (t = 0) corresponds to the year 1960. 1. Find the rate at which people relocated

170. math

Larry and Shamir want to build identical houses. They bought a rectangular piece of land and divided it into two identical squares.Each square piece of land has a area of 2500 meter squared. What is the perimeter of the original rectangle?

171. Find the intercepts

Find the intercepts and graph the equation. 3x+4y=12

172. physics

waves in a lake are observed to be 5 cm in length and to pass an anchored boat .8 s apart. the speed of the wave is

173. Algebra

For the given functions f and g find the following and state the domain of each result f(x)=5x+1/4x-7; g(x) = 3x/4x-7

174. physics

What is the acceleration if change in velocity is 1.2 m/s and the time interval of this change in velocity is 8.25 s? (Your answer will be in m/s^2)

175. physics

An underwater micriphone is used to record sounds emitted by porpoises. The minimum intensity level the instrument can record is 30.9dB. Assuming a porpoise emits sound at a rate of 0.0603J/s, what is the maximum distance at which the animal will still be

mrs. rothenberg bought a bag of 6 pears for \$5.40. what was the unit price per pear?

177. physics

a fish that you are looking at from a boat seems to be 20cm below the water surface. the actual depth of the fish is

178. GRAMMAR

WORD FORMATION.MY TEACHER GAVE ME A HOME WORK WITH STATES:FIND FIFTEEN WORDS ANS WRITE ITS ADVERB , VERB AND ADJECTIVE PLEASE GIVE ME A SITE WITH SOME OR HELP COME UP WITH SOME

179. Engineering

The power plant is to be operated in a region where the same company operates several other coal fired power plants that were all built in the 1960s. The new power plant is planned to have 500 MW energy generating capacity. The next largest plant is 50 MW

180. applied calculus

1. Consider the function y = xx (for x> 0). a) Why does the derivative rule for xn not apply? b) Why does the derivative rule for ax not apply? c) What are the four magic properties of logarithms? d) Take the ln of both sides. Use the properties of

181. algebra 1

why would you add or subtract equations that represents real-world situations

182. applied calculus

3. a) Write out the limit definition for the derivative of y = xx. Attempt to solve it. b) Write out the limit definition for the derivative of the inverse trig function from question 2. Attempt to solve it. c) Discuss the value of implicit

183. chemistry

What would the boiling point be of 300 ml with 40 g CuCl2 dissolved in it?

184. math

how do i find the surface area of a rectangular prsim

185. chemistry

If 8.72 grams of oxalic acid, H2C2O4, a diprotic acid, is neutralized when 23.4 mL of a solution of KOH is added, what is the molarity of KOH? the topic is acid-base triation, and i have already converted the mass to moles,but I am having trouble finding

186. Algebra

Help please! Write the series in sigma notation. 1/4+1/2+3/4+1+5/4+3/2

91*64

188. Math

Factorise fully: 5pq + 10p

189. english

Sam and John are building a new house in Florida. is it house or home?

190. english

Mrs. Jones said that we will have a fire drill at 8:45 on Thursday. I am confused is what she said in quotes and should the word that be taken out - the instructions says to correct sentence.

A hlaf dozen hair clip cost 43.90. maria wants to buy 4 hair clips. how much will she pay for them?

192. physics

An underwater micriphone is used to record sounds emitted by porpoises. The minimum intensity level the instrument can record is 30.9dB. Assuming a porpoise emits sound at a rate of 0.0603J/s, what is the maximum distance at which the animal will still be

193. physics

when the voltage across a resistor is v the power delivered is p. if the voltage if doubled to 2v, the power delieverd becomes

194. Rbowh

On the second problem r+11=19 r+11-_=19-_ r=_ Would it be R+11=30=19-11 R=8

195. maths-

a man bought a certain number of toys for rs 180 and he broke two of them. Then he sold each of the rest for Rs.10 more than he had given for it and thereby he makes a profit for Rs 60. find the number of toys he initially bought

A hlaf dozen hair clip cost 43.90. maria wants to buy 4 hair clips. how much will she pay for them?

197. Math

a cardbord gift-box has a surface area of 478cm2 and a volume of 570cm3. what are the length,width,and height of the carbox gift-box? I Need Help

198. matematicas

¿cual es el area de un terreno rectangular de 15.5 x 10.1m?

199. chemistry

Calculate the mass of co2 produced when 2ch3oh mixed with o2. Given that 2ch3oh is 4o grams and o2 is 46 grams.

200. physics

In a modern art exhibit, a multicolors empty industrial wire spool is suspended from two light wires as shown. (Pic) The spool has a mass of 50 kg with an outer diamter of 75 cm and an inner exle diameter of 18 cm. One wire (#1) is attatched tangentially

201. Calculus

1. In a certain country, the percentage of the population relocating to a new town is given by the following function: p(t) = 20.6e^-0,009t,where 0 ¡Ü t ¡Ü 52. Time is zero (t = 0) corresponds to the year 1960. 1. Find the rate at which people

202. Physics

Consider the LR circuit. We have R1=19 Ohms, R2=23 Ohms, R3=23 Ohms, V=14 Volts, L=0.09 H. L and R2 are connected in series, Combination of L and R2 in series is connected with R3 in parallel. This whole combination is connected in series with R1 and

203. language arts

During the lecture at Florida state, the audience of scientist was curious about how the guest speaker would treat the topic of life on other planets Q : what is the meaning of the word treat at is used in the sentence? A : To pay another persons expenses

204. Area of triangles

height is 12 inches area is 128 inches squared

solve the following quadratic equation and show steps 2z^4 +14z^3 + 20z^2

206. Science

Please please help this is the second time I have posted this question. Calculate the amount of work it will take to lift a lawn mower with a mass of 8kg onto the back of a truck which is 0.75m off the ground.show all conversions in your work.

207. Bus 599

In what way does the phrase, "gross domestic product," seem to be a misnome

208. mathematics

a man bought a certain number of toys for rs 180 and he broke two of them. Then he sold each of the rest for Rs.10 more than he had given for it and thereby he makes a profit for Rs 60. find the number of toys he initially bought

209. maths- urgent

a) Forming the smallest six digit number with different digits. Reverse the number and add the sum of the two numbers. b)Forming the smallest five digit number with different digits. Reverse the number and add the sum of the two numbers.

210. History

What are some of the toughest hardships that emigrants faced along the oregon trail?

how do i 2- fracture each third

212. Chem 1

Write a chemical equation that shows how acid rain H2SO3 was produced from SO2 gas and water in a zip sealed bag? My chem. teacher never explained how to do this and I have several other questions on this type of subject. If you could help me out it would

213. writing

I'm terrible at describing things. My prof wants me to give a visual/sensory description of this Child care center I wrote a profile story on... What's some advice on writing descriptive?

214. physics

is there an effect on rotational inertia of a bar pendulum if extra mass is added to it .what happans if the added mass is located exactly at the orignal center of mass of the pendulum

215. maths- rational no.

find two irrational numbers between 2.5 and 4.5

216. Chemistry

I have no idea where to even start with this. It seems like it should be simple, but I have no clue. The question is... "In serum, about 55% of total serum calcium is bound. The measurement of ionized (free) calcium with an ISE is 1.10 mM. What is an

217. Tourism Industry

Which of the following is a key tourism management challenge caused by the seasonality of demand, but greatly impacting service quality? A. revenue share B. loyalty systems C. access restrictions D. condo rating systems E. human resource scheduling

218. Engineering

The power plant is to be operated in a region where the same company operates several other coal fired power plants that were all built in the 1960s. The new power plant is planned to have 500 MW energy generating capacity. The next largest plant is 50 MW

219. Clinical Chemistry

Why is slightly higher serum sodium consistently found by evaluation by ion-selective electrode (ISE) as compared to flame photometry?

220. chemistry

Calculate the mass of co2 produced when 2ch3oh mixed with o2. Given that 2ch3oh is 4o grams and o2 is 46 grams.

How to figure if 60 cookies were baked and 7/12 were given away, how many are left?

222. math

Asia is about 3 times the size of antarctica together the 2 continents make up 2/5 of earth's land . what fraction of earth's land does antarctica make up?

223. Calculus,math

Constuct a rectangular box with a square base that holds a given volume V0 cm^3.? The cost of the material for the sides is 1 cent per cm^2, while the top and bottom costs 3 cents per cm^2. Find, in terms of V0, the dimensions of the box that will minimize

224. language arts

" Never one to give up, Margo worked Tenaciously to land a part on Prancing with the stars, and her tireless efforts finally paid off". Q : What Is the meaning of the word tenaciously as is used in the sentence? A : Hesitantly B : curiously C : lazily D :

225. math

Which of the following gives a set of numbers that are all solutions of the inequality x + 6 < 9 ? a. { -10, -7, -2, -1 } b. { -6, -3, 0, 3 } c. { -5, -1, 3, 6 } d. { 4,7, 10, 16 }

226. physics

Consider a circuit with an RL series with L=0.09 H and R=0.05 Ohm. At t=0 the circuit is connected to a battery which provides V0=12 V. (a)How long does it take to the current to equal a fraction 0.95 of the steady state current? (b) What is the energy

227. Algebra 2

Solve -2(3x+2y-3)>12

228. science

Do temperatures get warmer or colder as you move from the lower stratosphere to the top of that layer?.And how big is the change?.

229. physics

How much heat is lost in one hour through a 0.15 m × 3.7 m × 6.1 m concrete floor if the inside temperature is 22.0 °C and the ground temperature is 13.0 °C?

230. math

Anyone know what 1/2 is in simplest form??

231. PHI

Is racism and anti-Semitism still a problem in the United States

232. math

4xsquared+ 4x -3 =0 SOLVE

a package of 4 button costs \$1.30. how much will 4 package cost?

234. Math

Factor this polynomial a^5b-a

235. psychology

A behaviorist is asked to evaluate five students in the second grade who exhibit impulse control problems. The behaviorist decides it is best initially to study them in the classroom without interfering with the behavior. This behaviorist is conducting

236. life orintation

In 10-15 lines critically discuss 5 ways in which human or environmental problem on the community(water pollution)

237. Math

One side of a square frame measures 12 inches. What is the perimeter of the frame? Is this right 12*4=48 Perimeter =48

238. Math

What is the mean number of votes for the snow cone flavors? Cherry 40 Strawberry 7- Grape 30 Lime 20 Rainbow 40 A.180 B.36 C.40 D.18 C The range of a set of numbers is 52. The number with the greatest value in the set is 248. What is the number with the

239. math

What are the intersection points of y = 1/x and y = 1/x^2? Is it x = 0 and x = 1? Thank You

240. math

is there a value for x that makes the statement true, if so find x. explain(x+2)^2=x^2+2^2

241. language arts

No One ever thought the Lake Land DreadNaughts would beat the Tampa Sickles . So when it finally happened , the Dreadnaughts Fans were euphoric. Q : Wich of these is the closest in meaning to euphoric as is used in the sentence ? A : embarrassed B :

242. physics

what law is it when gravity pushes down on a rocket that is accelerating at a rate of 270 km/h

243. Calculus

1. In a certain country, the percentage of the population relocating to a new town is given by the following function: p(t) = 20.6e^-0,009t,where 0 ¡Ü t ¡Ü 52. Time is zero (t = 0) corresponds to the year 1960. 1. Find the rate at which people

244. math

All varieties of a certain brand of cookies are \$3.50 A person buys peanut butter and chocolate chip cookies. Write an expression that tepresents the total cost.

245. physics

It takes 222 kJ of work to accelerate a car from 22.1 m/s to 29.9 m/s. What is the car's mass?

246. language arts

During the lecture at Florida state, the audience of scientist was curious about how the guest speaker would treat the topic of life on other planets Q : what is the meaning of the word treat at is used in the sentence? A : To pay another persons expenses

247. language arts

During the lecture at Florida state, the audience of scientist was curious about how the guest speaker would treat the topic of life on other planets Q : what is the meaning of the word treat at is used in the sentence? A : To pay another persons expenses

248. History

Why did people move west in the 1800s?

249. area of triangle

the base of a triangle is 9 cm the area is 18 cm squared what is the height?

250. math

where is surface area and volume of rectangular prism used in real-life

251. math

i need to find an equation for (7,1)

252. maths

prove that: 1/1+x^b-a + x^c-a + 1/1+x^a-b +x^a-c = 1

253. English

e.g. I missed the history exam. What should I do? (What does that mean? Did "I" not take the test by mistake or on purpose? What did "I" do?)

254. math

1. 2xsquared-7x=-6 2. xsquared + 12x + 1= 0 3. xsquared + 6x + 20 = 0

255. tourism industry

Governments invest in many different industries, including the tourism industry. As a result, economic impact studies are conducted to assess the ______________ of this government spending. A. TFC B. TSA C. MUI D. ROI E. TEI

256. Clinical Chemistry

I have 2 questions relating to clinical chemistry... 1st: I have no idea where to even start with this. It seems like it should be simple, but I have no clue. The question is... "In serum, about 55% of total serum calcium is bound. The measurement of

257. Chemistry

Between Mg and Zn which one is the anode and which one is the cathode? And between Mg and Fe which one is the anode and which one is the cathode? Please help!!

258. maths-

A and B are two different values of C lying between 0 and 360 which satisfy the equation (p cosC + q sinC=r) then prove that cos(A+B)=(p^2- q^2)/(p^2+ q^2)

259. computer programming

how do I figure out the math problem for Excel 2010?

260. Math

If Kelly gave 1/3 of a pizza to Holly and 1/5 to Diane how much did she have left?

261. applied calculus

Let y=〖tan〗^(-1) x Rewrite it as an equation involving a trig function. Use implicit differentiation to determine an expression for y.

262. childhood edu

One of Rudolph Dreikur's contributions to the field of early childhood education is his belief that? A. All behavior is goal directed. B.There's a difference between behavior and misbehavior I think it's A,am I correct

263. PHYSICS - Waves

Can someone tell me how to get the answer to this question? Just a formula would be great. It's on my physics study guide for my unit test. It takes 2.30 s for an echo to come back from a sound wave sent to the bottom of a 25 degree C lake. How deep is the

264. chemistry

What would the boiling point be of 300 ml with 40 g CuCl2 dissolved in it?

265. Chemistry

What mass of silver can be produced by reacting 0.300 L of 0.100 M AgNO3 with an excess of Mg?

266. Math

The output values in a function table are 11, 17, and 23. The rule for the table is output=3m-4. What are the input values ...

267. math

julia picked 2 cards from a face down stack of cards containing 4 hearts 4 diamonds 4 clubs and 4 spades. Make a treediagram to find all the possible combinations for the 2 cards Julia picked

268. math

if two squares have the same area of 2500 meters squared,when combined what is the perimeter?

269. math

The problem I am trying to solve is from AQA Mechanics M1 and is as follows: An object is moving in a plane. At time t=0, it is at the origin, O, and moving with velocity u. After 2 seconds it is at A where OA = -2i - 4j. After a further 3 seconds it is at

270. math

make a setof 15 numbers with landmarks. max152 range 25 mode 139 median 142

271. maths

if x=2^1/3 + 2^2/3 show that x^3-6x =6

272. Math

Bill earns 1 dime the first day, 2 dimes the second day, 3 dimes the third day, 4 dimes the fourth day, etc. How many days will it take him to earn \$2.

273. math

Bob and Jim had a total of 90 marbles. Bob had half a dozen more than Jim. How many marbles did Jim have?

274. Clinical Chemistry

This one seems like an easy question but I don't know where to start. Please help! In serum, about 55% of total serum calcium is bound. The measurement of ionized (free) calcium with an ISE is 1.10 mM. What is an estimate of the total calcium in this

275. Air pollution Engineering

The power plant is to be operated in a region where the same company operates several other coal fired power plants that were all built in the 1960s. The new power plant is planned to have 500 MW energy generating capacity. The next largest plant is 50 MW

276. Math ( Number Theory )

How many numbers from 1 to 1000 inclusive can be expressed as the sum of k >= 2 consecutive positive integers for some value of k ? Sorry to post question from Brilliant, I got 997 integers, but it's wrong. If you think you can answer ...

277. Math

I am in third grade and have a word problem that I don't understand. There is a picture of a retangular window with 12 little squares inside divided by wood. The question is how many feet of lights would be needed to hang around five windows like this one.

278. Algebra

factor -2w / w(w+4)

279. lA

the havasupai are ararian; they live off the summer crops they grow in the valley. .. .. what is the meaning of the word agrariam as is used in the sentence? A. farming the land to survive b . hunting south of the canyon c . herding animals such as deer d

280. Algebra

Soymeal is 12% protein; cornmael is 6% protein. How many pounds of each should be mixed together in order to get 240lb mixture that us 9% protein

281. math

The total hours allotted for writing and oral competition is 2 three fifth hours. The writing competition is allotted 1 hour and five sixth. How many hours are allotted for the oral competition

282. chemistry

What would the boiling point be of 300 ml with 40 g CuCl2 dissolved in it?

283. computer

the meaning of this words â€¢ FOR- â€¢ DO - â€¢ SELECT- â€¢ MID\$- â€¢ ASC- â€¢ SQR- â€¢ LEN- â€¢ LEFT\$- â€¢ TIME\$- â€¢ INT-

284. Math

Tim practiced batting at a batting cage. For 25 cdnts he got 10 pitches . How many pitches did he get for 1.25?

286. science

explain the priniciples of light thaat enable the convex lens to function as it does

287. Writing

for this profile story i'm doing one of my sentences was Originally from central Indiana, Gilbert did not grow up in a diverse neighborhood, nor did she attend a diverse school system. My teacher told me to elaborate on when I say diverse.. Is this better?

288. Math

1 1/8 in. = how many miles?

289. math

The platform is 1 foot by 4 feet by 6 feet. What ha the surface area of the platform?

290. math

xsquared + 8x- 10 =1

291. math

What is 2:1 and 1:2 in simplest form?

292. math

height = 15 ft area = 285 ft2

293. math

i need to find an equation for (7,1)

294. Math

R+11=19 r+11-_=19-_ r=_

295. To rbowh

Was 34 right?

296. To rbowh

I don't understand how w-8+8=26+8.wouldn't the first blank be 0?

297. Math

W-8=26 w-8+_=28+_. W=