1. AP CHEMISTRY

Consider the reaction. PbCO3(s) PbO(s) + CO2(g). calculate the equilibrium pressure of CO2 in the system at the following temperatures.(IN atm) (a) 270°C (b) 480°C ..... delta Hf(KJ/mol).. d.Gf(KJ/mol).. S(J/mol-K) PbCO3(s)..-699.1 .. -625.5 .. 131.0

2. Statistics

The home states of a certain group of people are distributed as follows: 53 percent are from MISSOURI, 21 percent are from KANSAS, and 26 percent are from IOWA. (No one in the group had a home state other than one of these three.) (Note: Your answer to the

3. Geometry

determine the radius of a circle if a 24 inch chord is 9 inches from the center

4. Calculus

A cardboard box of 32in^3 volume with a square base and open top is to be constructed. What is the length of base that will minimize the surface area?

5. math

I really need help please Your primary job’s gross income is \$3,500.00/month, and your second job’s realized income is \$368.49/month. Deductions are FICA (7.65%), federal tax withholding (10.75%), and state tax withholding (8.35%). How much is the

6. Statistics

Suppose that the travel time from your home to your office is normally distributed with a mean of 40 minutes and standard deviation of 7 minutes. If you want to be 95% certain that you will not be late for an office appointment at 1:00pm, what is the

7. statistics

The scores on a national achievement test are normally distributed with a mean of 50 and a standard deviation of 10. Out of a group of 200 students, how many would you expect to score more than 70?

8. geometry

What's the next number 360, 180, 60, 15...?

9. chemistry

A vitamin C tablet containing 250 mg of ascorbic acid (C6H7O6; Ka = 8.0 x 10-5 is dissolved in a 250 mL glass of water. What is the pH of the solution? i tried answering this question multiple times but i still get it wrong.... can someone help?

asked by Finding the pH of a weak acid?
10. Converting Polar Equations to Cartesian Equations

If theta= pi/3 , then to convert to a Cartesian equation, let x = A.(1/2)r B.(square root of2/2)r C.(square root of 3/2)r

11. c++ programming

Write a program that determines the day number (1 to 366) in a year for a date that is provided as input data. As an example, January 1, 2011 is day 1. December 31, 2010 is a day 365. December 31, 2012 is day 366, since 2012 is a leap year. A year is a

12. geometry

The diameter of clock's face is 6 inches. Find the length of the minor arc formed by the hands of the clock at 4:00.

13. Converting Cartesian Equations to Polar Equations

Convert the Cartesian equation x^2 - y^2 = 16 to a polar equation. r² = 16/cos2è r = -4 r² = 8 help please im stuck between 2 answers.

The vertices of a triangle are P(–4, 1), Q(–2, –8), and R(8, –1). Name the vertices of the image reflected across the x-axis. P'(–4, –1), Q'(–2, 8), R' (8, 1) P'(4, –1), Q'(2, 8), R'(–8, 1) P'(4, 1), Q'(2, 8), R'(–8, –1) P'(–4, 1),

15. Chemistry

How much heat is required to warm 1.50 kg of sand from 20.0 C to 100.0 C?

16. Quail valley

A soccer ball is kicked upward from the ground with an initial vertical velocity of 3.6 meters per second. After how many seconds does it land?

17. Chemistry

What is the equilibrium equations that result when solid NH4F is dissolved in sufficient water to produce 5.0 mL of 0.5M NH4F solution? How would the addition of 5 drops of 0.1M HCl affect the equilibrium system. Give an explanation. How would the addition

18. Math

The McKeegan Corporation has two different bonds currently outstanding. Bond M has a face value of \$29,500 and matures in 24 years. The bond makes no payments for the first 7 years, then pays \$2,100 every six months over the subsequent 10 years, and

19. Economics

The spirit of equating marginal cost with marginal revenue is not held by a.perfectly competitive firms. b.oligopolistic firms. c.perfectly competitive firms and oligopolistic firms. d.none of the statements associated with this question are correct.

20. math

there are 6 brownies on a plate. Four people share them equally. How many brownies does each person get? show your solution

21. Physical Science

Two identical beakers are both half filled with a liquid. Beaker A contains water and Beaker B contains a liquid that is denser than water. Which of the following is FALSE? a. The pressure at the bottom of Beaker B is greater than that at the bottom of

22. Economics

Suppose you are the marketing manager for the Fruit of the Loom. An individuals' inverse demand for Fruit of the Loom women's underwear is estimated to be P = 25 - 3Q (in cents). If cost to Fruit of the Loom to producing women's underwear is C(Q) = 1 + 4Q

23. Economics

Two identical firms compete as a Cournot duopoly. The demand they face is P = 100 - 2Q. The cost function for each firm is C(Q) = 4Q. The equilibrium output of each firm is: A. 8 B. 16 C. 32 D. 36

24. research in CriminalJustice

The five year survival rate for Caucasians for all forms of cancer increased from 39% in the 1960's to 57% now. Express the change in two ways: (1) as an absolute difference in terms of percentage and (2) as a relative difference in terms of percent.

25. Mangerial Economics

Consider a Cournot duopoly with the following inverse demand function: P = 50 - 0.2Q1 - 0.2Q2. The firms' marginal cost are identical and given by MCi(Qi) = 2. Based on this information firm 1 and 2's reaction functions are A) r1(Q2) = 4.8 - 0.5Q1 and

26. Economics

The price elasticity of demand for senior citizens purchasing coffee from McDonald's is -5 while non senior citizens have a price elasticity of demand equal to -1.25. If is cost McDonald's \$0.02 to produce a coffee, the optimal price for a cup of coffee

27. english

the textbook stresses that your writing___that is, you must have "a goal of demonstrating the truth of your conclusions and clarifying and illuminating your idea about the topic and also about the work."

28. Physical Science

During a storm, the wind exerts a 150-N force on a window that measures 1.00 m by 0.50 m. The outside air pressure is 101 kPa. What pressure, in pascals, does the wind exert on the window? a. 75 Pa b. 150 Pa c. 1.5 x 10^3 Pa d. 3.0 x 10^2 Pa e. 3.0 x 10^5

30. Earth Science

Two locations, one in northern canada and one in the southwestern United states, recive the same amount of precipitation each year. The location in canada is classified as a humid climate. Why would the location in the United states be classified as an

31. Economics

The market demand in a Bertrand duopoly is P = 15 - 4Q, and the marginal costs are \$3. Fixed costs are zero for both firms. Which of the following statement(s) is/are true? a.P = \$3. b.P = \$10. c.P = \$15. d.None of the statements associated with this

32. 3 grade math ms sue

which is the better unit to use to measure the capacity of a bathtub: milliters or liters? explain your choice. a liter is equal to 100 centiliters. is a centiliter a greater measure than a milliter? expalin

33. Chemistry

What volume will be required to contain a mixture of 0.547 mol of N2 and 0.547 mol of O2 at 1.11 atm and 22.1 degrees celsius?

For an experiment we had to test the equilibrium of BiCl3 - BiOCl First I had to mix a small amount of BiCl3 with 2mL of water. After doing this the color was cloudy white. Then I added6.0M of HCl drop-wise in which the color became clear. Then 25mL was

35. Chemistry

The following reaction was studied at −10°C. 2 NO(g) + Cl2(g) → 2 NOCl(g) The following results were obtained where the rate of the reaction is given below. [NO]o [Cl2]o INITIAL RATE 0.10 0.10 0.18 0.10 0.20 0.36 0.20 0.20 1.45 What is the rate law?

36. chemistry

A gas is compressed from an initial volume of 5.60 L to a final volume of 1.22 L by an external pressure of 1.00 atm. During the compression the gas releases 128 J of heat. What is the change in internal energy of the gas?

37. chemistry

given; how many grams of fe2o3 can be converted to fe3o4 by 14 grams of co?

38. MATH

FIND THE RECTANGULAR PRISM. BASE AREA 56 IN 2 [SQUARED], HEIGHT 6IN. HELP!

39. Math

3logX - log6 + log2.4 = 9

40. physics

An object is located 30 cm to the left of a converging lens whose focal length is 50 cm. (a) Draw a ray diagram to scale and from it determine the image distance and the magnification. (b) Use the thin lens and magnification equations to verify your answer

41. Chemistry

Uranium-238 has half life of 4.51 * 10^9 years Uranium-234 has half life of 2.48 * 10^5 years Thorium-230 has half life of 8.0 * 10^4 years Radium-226 has half life of 1.62 * 10^3 years Lead-210 has half life of 20.4 years. The rate constant for the decay

42. Chemistry

Calculate DeltaHrxn for the following reaction: C + H2O --> CO + H2 Use the following: C + O2 --> CO2 DeltaH = -393.5 kJ 2CO + O2 --> 2CO2 DeltaH = -566.0 kJ 2H2 + O2 --> 2H2O Delta H = -483.6 kJ DeltaHrxn = ?

43. Economics

A local video store estimates their average customer's demand per year is Q = 7 - 2P, and knows the marginal cost of each rental is \$0.5. How much should the store charge for each rental if it engages in optimal two-part pricing? Answer A. \$0.35 B. \$0.5.

44. 3 grade english ms sue

fact and opinion a fact tells something that can be proved true or false. an opinion tells someones ideas or feelings.words that telll fellings, such as should or best, are clues to opinions. yu can ask an expert or use reference book to check whether a

45. physics

An object place 5cm in front of a converging lens of focal lenght 10cm produces a magnified image 8cm.find the size and the position of the image

46. chemistry

A sample of unknown gas weighs 2.96 g and occupies 750. mL at 760. mmHg and 100.°C. What is the molar mass of the unknown gas?

47. calculus

Given f'(x)=3cosx-10sinx and f(0)= -6 Find f(x)

48. Chemistry

What is the solubility in grams per liter of SrSO4, in 0.23 M Na2SO4? Ksp for SrSO4 = 2.5E-7

On December 31 of last year, Wolfson Corporation had in inventory 400 units of its products, which cost \$21 per unit to produce. During January, the company produced 800 units at a cost of \$24 per unit. Assuming that Wolfson Corporation sold 700 units in

50. Math

alberto has 12 quarters, 10 dimes, 10 nickels, and 20 pennies. How many different combinations of coins can he make to have \$2?

51. Calculus and vectors

Bob can swim at a rate of 5km/h. He is in a river that is flowing at a rate of 9 km/h. a) if bob swims upstream, what is his relative velocity to the ground? b)if bob swims downstream, what is his relative velocity to the ground? c) Someone decides to help

Dear Editor, 1 In your recent article "Just a Play Day," you argue that playing video games is a waste of time. You also descrive video-game players as lazy young people who loaf for hours in front of a screen. I respectfully disagree with your opinions. I

53. Math

The Surface Area of a Square Pyramid is 112 sq. ft. If the Length of Each Edge of the Base is 8 ft, what is the Height of each Triangular Face?

54. Chemistry

what is the solubility in mol/L of insoluble Ca3(PO4)2 (Ksp=1.00x10^-26)in a solution containing .00100 M Na3PO4? a. 2.15x10^-7 b. 7.18x10^-8 c. 7.18x10^-9 d. 1.00x10^-23 e. answer not given

55. Economics

A monopoly produces widgets at a marginal cost of \$8 per unit and zero fixed costs. It faces an inverse demand function given by P = 38 - Q. Suppose fixed costs rise to \$200. What will happen in the market? A.The firm will decrease its output and lower its

56. Science

1. A 25.00 sample of 0.723M HClO4 is titrated with a 0.273M KOH solution. The H3O+ concentration after the addition of 10.0mL is___M. 2. Determine the pH of a 0.188M NH3 solution of at 25 degrees C. The Kb of NH3 is 1.76x10-5.

57. chemistry

Mg(OH)2 + 2HCl = MgCl2 + 2H2O if 33.5g of Mg(OH)2 react, what mass of H2O could be produced

58. Managerial Economics

The demand for health club services is Q = 350 − 2P and the marginal cost of providing these services is MC = 110 + 2Q. If a two-part tariff pricing system is used, what is the optimal price and quantity combination? a.P = 52 and Q = 240 b.P = 199 and Q

59. math

THE VOLUME OF A RECTANGULAR PRISM IS 140 CUBIC FT. THE LENGTH OF THE BASE IS 7FT AND THE WIDTH OF THE BASE IS 4FT. WHAT IS THE HEIGHT OF THE PRISM?

60. math

The perimeter of a rectangular pool is 84 feet. The width of the pool is half the length. What are the measurements of the rectangular pool?

61. math

explain how you could use grid paper to draw a rectangle with a perimeter of 18 units

62. Economics

Suppose a manager is interested in implementing third-degree price discrimination. The manager knows that the price elasticity of demand for Group 1 is -2 and the price elasticity of demand for Group 2 is -1.2. Based on this information alone we can

63. Math

The illumination produced by a light source is inversely proportional to the square of the distance to the source. If a light source 5m from an object illuminates with 70 candela, what illumination would be produce if the object were mover to 12 m away?

64. c++ programming

Solve the following problem. Apply all the steps i.e decomposition, Flowcharting and Pseudo code. Also write C++ program. Design and Write an interactive program that computes the salary in Rupees of a part-time employee based on: - Number of days worked.

Dear Editor, 1 In your recent article "Just a Play Day," you argue that playing video games is a waste of time. You also descrive video-game players as lazy young people who loaf for hours in front of a screen. I respectfully disagree with your opinions. I

66. Chemistry

Consider the reaction of magnesium metal with hydochloric acid to produce magnesium chloride and hydrogen gas. If 3.85 mol Mg and 3.85 mol of HCl are reacted, how many mol of oxygen are left over? I balanced the equation and got Mg(OH)2+2HCl=MgCl2+2H2O.

67. Chemistry

Which of the following gases occupy the smallest volume at STP? a) 1.000 mol carbon dioxide b) 4.032 g H2 c) 35.45 g Cl2 d) 6.022 x 10^23 molecules of O2

68. math

find the median 44,68,48,61,59,48,63,49

At the end of January, Mineral Labs had inventory of 725 units, which cost \$10 per unit to produce. During February the company produced 650 units at a cost of \$14 per unit. If the firm sold 1,000 units in February, what was the cost of goods sold? a.

70. Economics

Two firms compete as a Stackelberg duopoly. The inverse market demand they face is P = 62 - 4.5Q. The cost function for each firm is C(Q) = 8Q. The outputs of the two firms are: A. QL = 48; QF = 24. B. QL = 35; QF = 6. C. QL = 6; QF = 3. D. None of the

For an experiment I had to add 1 drop of 1.0M HCl into a test tube that had 2.5mL of 0.10M Na2CrO4 and record the color. The original color of the Na2CrO4 was yellow. After adding the HCl the color became a very dark yellow. I know that the equilibrium

72. science

You are confronted with the following question: One mole of an ideal gas is sealed in a 22.4- container at a pressure of 1 and a temperature of 273 . The temperature is then increased to 305 , but the container does not expand. What will the new pressure

73. physics

You have a parallel plate capacitor (with air between its plates) which is attached to a voltage source until the capacitor is fully charged. (a)After detaching the capcitor from the voltage source, you move the capacitor's plates farther apart; which of

74. chemistry

Calculate the pH of a 0.87 M NaCN solution. Solve it exactly (no assume x=0.1)

75. physics

Two objects of equal mass are on a turning wheel. Mass 1 is located at the rim of the wheel while mass 2 is located halfway between the rim and the axis of rotation. The wheel is rotating with a non-zero angular acceleration. For each of the following

76. Math

Each cube below is made up of smaller cubes, but the large cubes are not solid. They had tunnels through them. • The first cube originally had 27 small cubes, but the tunnel removed 3 cubes. • The second cube originally had 64 small cubes, but two

77. Physics

A 41g bullet is traveling at 499m/s when it strikes a block of wood. If the block of wood exerts a force of 50,000 N opposing the motion of the bullet, how far will the bullet penetrate the block of wood?

78. science

if the density of octane is 0.703 g/mol, how many gras of carbon dioxide are produced in the combustion of 40L of octane??

79. Physics

On a banked race track, the smallest circular path on which cars can move has a radius of 113 m, while the largest has a radius of 164 m, as the drawing illustrates. The height of the outer wall is 17.4 m. Find (a) the smallest and (b) the largest speed at

80. chemisrty

The molar heat capacity of silver is 25.35j/mol C . How much energy would it take to raise the temperature of 9.30 grams of silver by 12.0 C?

81. Chemistry

The number of moles of hydrogen gas present in a 1,500 mL container at 298 K and 2.0 atm pressure is?

82. Chemistry

What is the balanced equation for the reaction of acetylsalicylic acid and sodium hydroxide?

83. chemistry

the components in the following glycerolphospholipid are: O || CH2OC(CH2)14CH3 | O | || CHOC(CH2)14CH3 | O | || + CH2OPOCH2CH2NH3

84. algebra

The period of a pendulum is the time it takes to swing from left to right and back again. The period T seconds, of a pendulum is directly proportional to the square root of its length, Lcm. When L=25, T=1 Find a formula for T in terms of L.

85. Physics

1.Can an object reverse its direction of travel while maintaining a constant acceleration? If so, give an example. If not, explain why not. 2. If you were standing in a bus moving at constant velocity, would you have to lean in some special way to

86. math

Phillip made fudge that filled a 20-cm by 21-cm by 3-cm pan. a)what is the volume of the fudge? b)there are 30 bpeople in the class how much fudge will each person get? c)How should the fudge be cut so that each person gets the same sized peice? d)what are

87. tax

On May 26, 2007, Jamal purchased machinery for \$30,000 to be used in his business. He did not elect to expense the equipment under §179 or the bonus. On October 10, 2011, he sells the machinery to a scrap metal dealer. What is his cost recovery deduction

88. NEED MAJOR HELP! *QUADRATIC EQUATIONS*

Write the equation for the circle with center at (- 8, - 6) and radius of 10. (x+8)² + (y + 6)² = 10 (x+8)² + (y + 6)² = 100 (x-8)² + (y - 6)² = 100 Find the standard equation for the circle with center on the positive x-axis and passing through the

89. geometry

a ladder is 53 inches. how tall is it in feet and inches

90. math

a boat travel for 4hr from pole a to pole b.then it travel for 3hr from pole b back to pole a.the distance between the two poles was 40km a.find the total time taken for the whole journey b.find the average speed for the whole journey

91. math

Tema Oil Refinery ( TOR ) is the only company mandated to refine crude oil in Ghana. The company has estimated that the fixed cost would be \$ 80000. Variable costs depends on the amount of crude oil refined but include the cost of labour and administrative

92. math

input:1 output:4 input:2 output:7 input:3 output:10 input:4 output:13 What is the rule?

93. tax

In order for an employee to deduct home office expenses, which of the following must occur? a. There must be no other fixed business location. b. The taxpayer's most important activities must occur in the home. c. The home office must be for the

94. tax

Marion drives 20 miles a day from his first job to his second job. He worked 125 days during 2011 on both jobs. What is Marion's mileage deduction rounded to the nearest dollar assuming he uses the standard mileage rate and mileage is incurred ratably

95. statistics

The average score on a science test was 72 with a standard deviation of 6. The average score on a history test was 89 with a standard deviation of 7. Compare the variability of the two classes.

96. math

if the height is 3cm and the base of the area is 4cm 2 what is the volume? and is the lil 3 the sign for volume?

97. statistics

The distribution of scores is normal with a ì = 100 and ó =15. What proportion of the population have scores A) Above 130? B) Below 90? C) Above 110?

98. English

I left out these other two sentences. Thank you very much. I need to fix sentence 2 using linkers. 1) From the ship Robinson takes paper, ink and a pen, which he uses to write a diary necessary for Robinson to mantain an ideal contact with his motherland.

99. math

What can you interpret from the scatter plot above?

100. Physics

On a banked race track, the smallest circular path on which cars can move has a radius of 113 m, while the largest has a radius of 164 m, as the drawing illustrates. The height of the outer wall is 17.4 m. Find (a) the smallest and (b) the largest speed at

101. math

there are 20 cars and 36 trucks in a parking lot what ratio accurately compares the number of trucks to cars

102. Economics

If a firm supplies separable markets with price elasticities h1 = -3 and h2 = -2, it should set prices P1 and P2 so that: a.2/3P1 = 1/2P2 b.3P1 = 2P2 c.2P1 = 3P2 d.P1 = P2 e.2P1 = 2/3P2

103. math

Find the dimensions of a rectangle with perimeter 40 with the largest area. (hint: Find an equation for area and one for perimeter, use both to find perimeter in terms of one variable)

104. Geometry

I am leaning a ladder against a wall. The ladder is 18 ft long, and I place the bottem of the ladder away from the wall, forming a 48° angle. How far away is the bottem of the ladder from the wall?

105. History

￼￼￼￼All of the following statements about Jaoan in the last year of the war are true except: A. Japanese retreated from Okinawa B. Fire bombs crippled Japanese economy and war production C.Japanese treated Postdam Decleration with disintrest. I

106. chemistry

If 73.5 g of liquid Br2 and 330 mL of 1.18 M aqueous NaI are reacted stoichiometrically according to the balanced equation, how many grams of liquid Br2 remain? Round your answer to 3 significant figures. 2NaI(aq) + Br2(l) → 2NaBr(aq) + I2(s)

107. Math

The table shows the number of lemons needed to make different numbers of pitchers of lemonade 24lemons 3pitchers 32lemons 4pitchers 56lemons 7 pitchers 96lemons 12pitchers What is the relationship between the number of pitchers and the number of lemons?

108. statistics

Bill spends an average of 5 minutes each day waiting in lines. If Bill is typical of the 290 million people in the United States, which of the following expresses the approximate combined amount of time these people spend annually waiting in line? A. 1.45

109. science

what is the difference between convection and conduction and what are their defemitions ...studying for test but i don't know what they are:)

110. math

it took a ball 1 minute to roll 90 feet. What was the ball's average rate of speed, in inches per second?

111. AP History

What was the impact of Eli Whitney's interchangeable parts concept and what impact did Eli Whitney's cotton gin have? Why was the cotton gin so important?

112. math

how would you write the ratio of 4 white shirts to 6 red shirts

Lansing Auto Pats, Inc., has projected sales of \$25,000 in October , \$35,000 in November, and \$30,000 in December of the company’s sales 20 percent are paid for by cash and 80 percent are sold on credit. The credit sales are collected one month after the

114. English

i have to make creative story abt me having mental illness. i really having trouble with this. i not know what mental problem to write about and how write it. i please really need help. in class we also watch movie A Beautiful Mind and this guy see

115. math

Determine the remainder of the following polynomial divisions: (2 marks) A) (4x4 + 3x2 - x + 3) ÷ (x + 1) B) (3x2 + 2x - 7) ÷ (2x - 1)

116. English

In the word ecologists, is eco the root morpheme or ology? Are the morphemes eco, log, y, ist, s or ec, ology, ist, s ? This is very confusing for me. Any explanation on how to find the root would be appreciated. For example, on contributions are the

117. to ms.sue, writeacher, martha, or vanessa

come up with 1 fraction up to 99 that has 2 different prime numbers that can work. For example: 20/30 the prime numbers there are 2 and 5. 20 divided by 2. 30 divided by 2. then it would be 10/15. then you do 10 divided by 5. 15 divided by 5. then it would

118. math

you have several coins that total 38 cents. you have the same number of pennies as you do nickles. how many coins do you have?

119. counseling

Each student will write a paper on a specific DSM disorder (e.g., not anxiety disorders, but a specific aspect of a specific anxiety disorder. I am not sure what the instructor is wanting I want to do a paper on Attention Deficit Hyperactive Disorder

120. alg 1 college

can you guys please help me wwith a math problem, its asking to solve this equatoion, sqare root5x-4=3x-18. to fkire off first 5x-4= 3x-18 squared. foil thatand you are looking AT 9x squared -54x -54x+324/ add the -54 to 108x.then shoot the 5x to to the

121. Geography

we were asked to compare two countries using a chart: children and youth (age 0-19) Working adults (age 20-59) and Seniors (age 60 and older) we were then asked to identify the developed and the developing countries and make predication on the following

122. physics

A series circuit contains only a resistor and an inductor. The voltage V of the generator is fixed. If R = 20 Ω and L = 2.8 mH, find the frequency at which the current is one-fifth its value at zero frequency?

123. science

If the greatest potential energy is 100J will the kinetic energy of the object ever reach 100J?

124. geometry

a ladder is 15 ft long and is leaning against the wall. the top of the ladder is 12 feet above the ground. find the distance from the bottom of the ladder to the wall. draw and label a picture and show work....

125. math

I have 20 pieces of sod that are 1ft X 2ft and 20 pieces of sod that are 1ft X 3ft. How large a square in my garden can I put them on?

126. ELA

what are some topics for argumentative writing around the world right now like troops going back to Afgan

128. algebra

what is the intersection for 15x-8y=-41 and 1.6x-2.8y=6.4

129. Physics

A resistance of 400 ohms and inductance of 8H and a capacitance of 20 microfarad are connected in series. Cal. (I) the peak current (ii) the phase angle when an a.c voltage of 40v, f= 900Hz is connected across them

130. math

if the ratio of free throws made to free throws attempted is 5 to 6 what would be the possible number of free throws made and free throws attempted

131. Economics

If a firm supplies separable markets with price elasticities h1 and h2, it should set prices P1 and P2 so that: a.P1 /h1 = P2 /h2 b.P1/(1 - 1 /h1) = P2 / (1 - 1/h2) c.P1(1 + 1/h1) = P2 (1 + 1/h2) d.P1 = 1 - 1/h1 and P2 = 1 - 1/h2 e.P1h1 = P2h2

132. math

on monday, ivy crawled one inch more than tuesday. on tuesday, ivy crawled twice as much as on wednesday. on wednesday, ivy crawled 4 inches. how many inches did ivy crawl each day

133. Maths

A steel bar 3.6m long is in the form of a triangular prism.its section is right angled i sosceles triangle with sides 50mm.the volume of the bar in cubic meters is? A.0.045 B.0.0045 C.0.0125 D.0.018 E.0.00125

134. math

Factor each of the following trinomials: (14 marks) A)15s2 + 26s + 8 B) x4 – 5x2 – 36 (hint: let a = x2) C) t2 + 4t – 2 D) 2w2 – w – 4

135. Math

Let csc(x)=-3. Find all possible values of sin(x)+cos(x) ------------- sec(x)

136. math

If (x – 3) divides evenly into x3 – x2 – kx + k, find k. (2 marks)

137. math

If there were only cats and dogs at the pound and the ratio of cats to dogs was 3:4 if there were 105 cats, how many animals altogether?

138. Physics

A 659g block is placed on a spring with a spring constant of 194N/m, compressing it 30cm. What height does the block reach when it is launched?

139. math

one fourth of the childern in room 20 have dogs how many kids have dogs

140. English

Can you please check these other sentences? Thank you very much. 1) Robinson makes Friday a slave. He calls him Friday because of the day the savage was saved. Better: after the day he is rescued/after the day of his rescue. 2) There were specific

141. Algebra

Simplify the following expression: 2(4y + 5z) - 10z

142. math

you want to spend at most \$10 for a taxi ride. before you go ansywre the taxi driver sets the meter at the initial charge of \$2 the meter then adds \$1.25 for every mile driven. if you plan on \$1 tip what is th efarthest you can go? it is Inequalities

143. math

plz help students in a math class need an average of at least 90 points to earn an A. one student test scores are 88,91,and 85 what must be the strudent score on the nest test to earn an A? it is Inequalities

144. math

write a quadratic function and an exponential function with a base of 2 whose values at x=5 are between 50 and 64

145. Math

Determine a relationship between the x- and y- values in the equation {(0,1), (1,0), (2, -1), (3, -2)}. Write an equation......y=?

146. Grammar and writing

What is the adverb? Pete sometimes pretends he is strong, silent cowboy.

147. English

I tried to check things myself but I still have a few doubts. Please, have a look at them. 1)A novel is retrospective when the narrator recollect memories from his/her past. 2) Friday is similar to a European in his complexion. However, he describes only

148. Calculus

differentiate (x^2 + 3x + 2) - (4x - 1)

149. Psychology

What is the opposite of a background stressor ?

150. calculus

Given f ''(x)=6x–4 and f '(0)=1 and f(0)=5 find f '(x) and f (1)

151. Chemistry

Find the amount of themal energy needed to raise the temperature of 5 g of a substance from 20 c to 30 c if the specific heat of the substance is 20.1 j/g c

152. Science

1.What is refraction? The bending of light as it passes through matter 2.What type of lens would you use to magnify your view of a butterfly? Concave 3.What is a sound wave? Sound waves are waves of energy moving through matter.Sound waves are vibrations

153. Math

They have 20 pieces of 12 foot lumber. If they need 2 screws for every 3 feet of lumber, how many screws do they need?

154. Math

What does x equal in x^2/(.81-x)?

155. social studies

under the bolshevieks the russian empire expanded in size and power

Income from operations, \$151,800 The following events took place for Fed Inc. during October 2012, the first month of operations as a producer of road bikes: • Purchased \$427,000 of materials. • Used \$367,500 of direct materials in production. •

157. English

Writacher, I didn't revise these questions. Though they can be improved, I can't see anything wrong with grammar. 1) Provide a description of Friday as given in Chapter 16 of Defoe’s Robinson Crusoe. 3) Outline the main features of 18th-century novels.

158. statistics

Consider a random sample of 37 students, and consider the number who graduate in six years. . Find the probability that 20 students in the sample graduate in six years

159. Math

Allison's 11th birthday is just around the corner. Her parents are remodeling her bedroom for her birthday. They will replace her carpet and repaint her walls Allison's Room Height 8ft Width 11ft Length 13ft 1.Allison wants the top 1/2 of her walls painted

160. English

I left out these sentences. I really hope you can check them, too. 1) When Robinson arrives on the island he brings some tools he took from the ship with him; He has got a Bible, some seeds, a diary, weapons and gunpowder. 2) He keeps himself busy by

161. Math

Norton has cycled 15 miles and has drunk 7 liters of water. Which is the most reasonable prediction of the number of liters of water he will drink by the time he has cycled 50 miles? A.17 B.23 C.31 D.65 C?

162. geometry

Two legs of a right triangle have 11 and 13 what is the measure of the larger acute angle?

163. MATH

WHAT IS THE BASE AREA THE BOX? L=8 IN. W=3 1/2IN AND H= 13IN.

164. math

If (x – 3) divides evenly into x^3 – x^2 – kx + k, find k. (2 marks)

165. math

_____+______=______ Then use partial sums and solve. ...... 9 pictures in it. the students used 585 pictures all together. how many students were there in all?

166. physics

An object was launched with a velocity of 20 ms−1 at an angle of 45° to the vertical. At the top of its trajectory the object broke into two equal pieces. One piece fell vertically downwards. Where would the other piece fall? (Take g = 10 ms−2)

167. English

Can you please check these other sentences,too? Thank you. 1) Every detail in the novel is accounted for in the most precise manner. 2) Friday's physical traits are similar to those of a European. Friday doesn't believe in God so he is not Christian.

168. math

pei fen walked a distance of 526 m.then she walked for another 5minutes at a speed of 70m/min.she took a total of 12 min to walk the entire distance. A.find the total distance that pei fen walked b.what was pei fen's average speed for the whole journey?

169. geometry

What's the next number 360, 180, 60, 15...?

(-3u)^5

171. calculus

Simplify with only positive exponents: (v^-1/2t)^-2(t^2/v^-2)^-3

172. childhood education

The goal of Binet and Simons original intelligence test was to: A.develop an objective method for assigning students to special classes. B.determine the underlying mental abilties associated with intelligence. My choice is A.Is it correct? thanks

173. physics

For which of these will the buoyant force be the same as its weight when placed in water? A) A match stick.B) All of these.C) A small rock.D) None of these.E) A nail.

174. psychology

Is community treatment for schizophrenia effective? Think about what constitutes “community” and is it the same everywhere? Explain.

175. English

I left out a few more things and a short translation. Can you please check them, too? 1) Four of your students have sent email so far. Can you please send me the individual email addresses of your partecipating students so that we can start the email

176. tax

On July 15, 2009, Travis purchased some office furniture for \$20,000 to be used in his business. He did not elect to expense the equipment under §179 or bonus. On December 15, 2011, he sells the equipment. What is his cost recovery deduction for 2011? A.

177. physics

A bench seat is attached to a wall by hinges and supported from above by two ropes, as shown in the figure below. The seat weighs 139 N and is designed to support a person weighing up to 1300 N, sitting on the edge. How much tension must each rope be able

178. Geography

need help predicting what should be done to prepare each of our two countries for education for young people, Infant care for young mothers, Home construction for growing families, and Medical care for seniors. Age group for each: 0-19 -25.90, 20-59 -51.70

179. Maths

A shopkeeper sells a hat for \$14.the amount he gains is three times the amount he loses when he tries to sell it for \$8.find the cost price? A.9 B.8.5 C.9.5 D.11 E.10

180. to ms.sue

your a life savor. i couldn't have finished my homework without your help.i'll maybe come back tommorow. Bye.good night,sweet dreams! thank you so much!!!

181. Further maths

If S=(2+3t)(5t-4),find ds/dt when t=4/5sec.

182. Informal logics

"Julie and Kurt got married and had a baby" is best symbolized as

183. biology

what is the different between diet and health.

184. Further maths

If S=(2+3t)(5t-4),find ds/dt when t=4/5sec.

185. Algebra 2

(4-3/x^4)/(5+2/x3) Simpify, Leave in factored and reduced form.

186. Chemistry

What is initial concentration of a sodium acetate if the pH (at epuilibrium) is measured to be 9.30?

187. Algebra

If I have an 83 average and I take a test that's 1/3 of my grade and get a 60 on it what would be my total average?

188. math

the top of a hill is 40m tall. the horizontal distance from the runaway is 325 m. if the pilot clear the top of the hill by 45 m, what is the angle of takeoff?

189. English

Here are some other sentences I need to check with you. Thank you very much. 1) He writes a diary with everything he does on the island (and records everything he does on the island?). 2) To feed himself, in addition to goats’ meat and milk, he plants

190. math

If a 4'x4' area equals 20% of the whole what is the size of the whole?

191. Chemistry

the reaction 2 NO + O2 2 NO2 (delta H = -114.2 kJ) has a Kc=7.00 x 10^7 at 200 degrees Celsius. what is the value of Kc at 400 degrees celsius? a. 1.25x10^4 b. 1.68x10^8 c.3.91x10^11 d. 5.74x10^22 e. answer not given

192. physics

In a series circuit, a generator (1254 Hz, 13.8 V) is connected to a 15.5-Ω resistor, a 4.25-µF capacitor, and a 5.32-mH inductor. Find the voltage across each circuit element. VR = VC = VL =

193. Physics

If you happen to be trapped inside a burning building and need to jump out of the window, should you propel yourself upwards first or just let yourself fall? No not perform any calculations. Explain your answer. Air resistance is considered negligible.

194. Math

Need help. A microwave oven sold for. \$95 and discounted to \$45. What is the percent of decrease? I got 47.4% is this right ? A men's store. Reduced. The price of a hat from \$12.50 to \$10.00 what is percent of discount? I got 1.25 or 1.3% is this right?

195. math

Taylor is planting 4 trees at the community center.She wonts to leave a 2 square foot area between each one.How many square feet does she need for the trees?

196. trig

if tan(θ)=√(33) / 4 (√ does not ride over 4) find sin(θ)

197. trig

If theta is a standard position angle and cot theta = 1.85, in which quadrant(s) could theta lie?

198. chemistry

What is (a)PH(b) POH of a solution wholes hydrogen ion consentration is 5.00x10-4?

199. math

find the zeroes of g(x)=(x^2-5x-6)/(x^2-9) I know i suppose to use synthetic division, but the denominator has x^2 in it. Does this matter or do I just divide by -9

200. math

If you have 360 books and you pick up 90 what is the percent

201. math

If you have 360 books and you pick up 90 what is the percent

202. math

If you have 360 books and you pick up 90 what is the percent

203. Chemistry

What are the units for the rate constant for a second and third -order rate law?

204. math

If I spent 3/8 of her allowance and then another 3/8, how much does she have left?

205. geometry

If the mean of a certain population is 250 and the standard deviation is 40, what x value corresponds to the z-score of -0.35.

206. math

ALANIS WALKING TA AFRIENDSHOUSE HECOVERD 6/10 OF THE DISTANCEIN 48 MINUTES IF HE CONTINES AT THE SAME SPEED ABOUT HOW LONG WILL THE ENTIRE WALK TAKE

207. AP History

What was the Talented Tenth? Who proposed it & why?

208. global culture attributes

what is global culture attributes?

209. Math

Max's pencil was 8/23ft and Ian's pencil was 6/12. How much loner is Max's pencil than Ian's? A.2/12 B.4/12 C.6/12 D.14/12 Is it A or C?

210. English

1. Wilma tried very hard to succeed as an athlete. 2. Wilma tried to succeed as an athlete very hard. (Do both sentences have the same pattern and the meaning? Is the verb 'tried' a transitive verb, and take an object the to infinitive? Or is the verb

211. Maths

Taona and Stella both live 5km from the Hospital,stella walks at a speed of 4km/hr,while taona cycles.if stella leaves home 45minutes earlier than Taona,they arrive at the same time.how fast does Taona cycle

212. Math

For a poll, 60 students were selected at random from the 6000 students at Calgon Community College. It turns out that 12 were in favor of higher parking fees to support extra police patrols of parking lots on campus. In this example, the sample proportion

213. chemistry

A gas occupies 10 liters at a pressure of 40.0 mm hg. What is the volume when the pressure is increased to 60.0 mm hg

214. Math

How to round 63 for homework

215. Earth/Space Science

Which of the following is responsible for absolute sea-level changes? A. formation and melting of ice sheets B. erosion of land surfaces by wind and water C. human activities along coastlines, such as development and grading D. movements of a tectonic

216. math

Complete the square to find the vertex of each quadratic function. State the vertex. (10 marks) A) f(x) = x2 + 8x – 3 B) f(x) = x2 – 5x + 8 C) f(x) = 2x2 – 12x + 1 D) f(x) = 3x2 + 2x – 5

217. math

If (x + 2) is a factor of m^2x^4 + 5mx^3 + x^2 – 7x – 2, find m. (4 marks)

218. math

When px^3 – 2px^2 + 3x – p is divided by (x – 1), the remainder is -5. Find p. (2 marks)

come up with 1 fraction up to 99 that has 2 different prime numbers that can work. For example: 20/30 the prime numbers there are 2 and 5. 20 divided by 2. 30 divided by 2. then it would be 10/15. then you do 10 divided by 5. 15 divided by 5. then it would

-13/18÷20/27

221. dressmaking

Which type of fastener becomes more secure when yu try to pull the garment pieces apart? a) snap fastener b)hook and eye c)velcro d)zipper I feel the answer if b)but feel it cld also be d)What do yu think is right

222. calculus

Consider ∫R∫syDA, where R is the square R=[0,1]x[0,1]. Let us compute some Riemann sums. For any positive integer n we partition R into n^2 little squares Rij each with sides 1/n long. Within each little square we evaluate the integradn at the point

223. geometry

Find the perimeter of the figure if AB = 8 inches and BC = 14 inches.

224. math

what property is being used in the equation 4p+7+7+4p.

225. Math

Suppose you invest \$8000 at a nominal interest rate of 5.75% for 5 years. Find the accumulated amount if your account is accumulated yearly.

226. Physics

If the cart weighs 3.9kg and the cart starts at a height of 7.8m, what is the final velocity of the cart?

Él no va nunca.He never goes Él ve alguien.He sees someone. Él no ve nadie.He doesn’t see anyone.

228. General math

30 3/4 x 60 3/8

229. geometry

i need to write the word that describes the lines or line segments for the following: 1> the strings on guitar : parrallel 2. the marks left by a skidding car : parrallel 3> sidewalks on opposite sides of streets: parralel 4> the segments thta make up a +

230. Math

Simplify with only positive exponents: (v^-1/2t)^-2(t^2/v^-2)^-3

231. to ms.sue

i know how to do it but I don't understand what it means when it says up to 99.

232. dressmaking

The tops of pants or a skirt is finished with facing when a)extra strength is required at the waistline b) its not possible to layer the fabric c) a stay tape cant be used in the seams d0yu don't want the waistband to be visible from the right side. My

233. math

Starting at A, count the number of linear inches to go completely around the outside of the rectangle. (Each square is 1 inch long.) what doe s this mean!?!

234. English

I urgently need to check some paragraphs with you. I hope you can help me. I repeated the same sentence many times to see all the possible variations. Thank you very much. 1)Defoe's novels are fcitional and retrospective autobiographies always pretending

235. math

16stickers are placed in a box if one sticker Is drawn from the box which color is it most Likely to be? Key:-1 Red I I I Blue I I I I Yellow I I Green I I I I I I I

236. To ms.sue

i still don't understand what it means when it says up to 99. can it be 45/99 orsomething like 4/72. can you give me an example?

237. physics

Which floats with most of its volume below the surface? A) None of these.B) An oak log.C) All of these.D) An iceberg.E) A mountain range.

238. calculus

Consider ∫R∫xydA, where R is the square R=[0,1]x[0,1]. Let us compute some Riemann sums. For any positive integer n we partition R into n^2 little squares Rij each with sides 1/n long. Within each little square we evaluate the integradn at the point

239. healthcare accounting

what is the entry when we get a gift of \$100,000 for cancer research only with the investments earnings also limited to cancer research?

240. physics

start at a 9 meter hill, standing on a 77kg skateboard whats the kenetic energy at the bottom of the hill

241. statistics

customer arrive at alocal ice cream stand at an average rate of 16 perhour. what is the probability that 2 customer will arrive during the next 15 minutes?

242. English

Here are other sentences I need to check. Can you please help me to have a look at them? Thank you. 1) In his Robinson Crusoe, Defoe uses retrospective first person (or 1-st person) narration because he recalls memories from his past adventures. (Not

243. statistics

from generation to generation, the average age when smokers first start to smoke caties. however, the standatd deviation of that age remains constant of around 2.1 years. a survey of 40 smokers of this generation was done to see if the average starting age

244. to ms.sue

which one is an example of up to 99