# Questions Asked onFebruary 15, 2012

1. ## AP CHEMISTRY

Sufficient strong acid is added to a solution containing Na2HPO4 to neutralize one-half of it. what will be the pH of this solution? Explain please

2. ## AP CHEMISTRY

What would be the pH of a solution prepared by combining equal quantities of NaH2PO4 and Na2HPO4? Explain with an equation.

3. ## geometry

A triangle has side lengths of 14 cm, 48 cm, and 50 cm is it acute, obtuse, or right

4. ## AP CHEMISTRY

Phosphoric acid is triprotic acid (three ionizable hydrogens). The values of its stepwise ionization constants are Ka1= 7.5E-5, Ka2= 6.2E-8, and Ka3= 4.2E-13 1) Write the chemical equation for the first ionization reaction of phosphoric acid with water

5. ## AP CHEMISTRY

Phenolphthalein would not be an appropriate indicator to use to determine the Ka1 of phosphoric acid Why not? what indicator would be appropriate? I Think its 8-11 as it is a small range but i'don't know if its right.

6. ## Math

In a bag of marbles, 3/5 of them are blue and the rest are red. If the number of red marbles is doubled and the number of blue marbles stays the same, what fraction of the marbles will be red?

Elemental mercury was first discovered when a mercury oxide was decomposed with heat, forming mercury metal and oxygen gas. When a 0.204-g sample of the mercury oxide is heated, 0.189 g of mercury metal remains. a)what is mole ratio of mercury to oxygen in

8. ## physics

A couple of astronauts agree to rendezvous in space after hours. Their plan is to let gravity bring them together. She has a mass of 66.0 kg and he a mass of 72.0 kg, and they start from rest 25.0 m apart. 1)Find his initial acceleration. 2)Find her

9. ## physics

What is the magnitude of an electrostatic force experienced by one elementary charge at a point in an electric field where the field intensity is 3.0 x 10^3 newtons per coulomb? a) 1.0 x 10^3 N b) 1.6 x 10^-19 N c) 3.0 x 10^3 N d) 4.8 x 10^-16 N

10. ## physics

a bullet is fired at 660 m/s and strikes a target 200 meters away. what is the duration of the bullet?

11. ## Physics!! Help!!!!!

A wire of length L and cross-sectional area A has resistance R. What will be the resistance R_stretched of the wire if it is stretched to twice its original length? Assume that the density and resistivity of the material do not change when the wire is

12. ## Math

We are studying pythagorean Theorem. How do I set this up to solve? A jogger goes half a mile north and then turns west. If the jogger finishes 1.3 mi from the starting point, how far west did the jogger go?

13. ## Pre Calc

From an observation point A, a forest ranger sights a fire in the direction S32°20'W (see the figure). From a point B, 5 miles due west of A, another ranger sights the same fire in the direction S57°40'E. Approximate, to the nearest tenth of a mile, the

14. ## chemistry

The purity of a pharmaceutical preparation of sulfanilamide, C6H4N2O2S, can be determined by oxidizing the sulfur to SO2 and bubbling the SO2 through H2O2 to produce H2SO4. The acid is then titrated with standard NaOH. Calculate the purity (%w/w

15. ## home economics

What is disposal of fullness

16. ## Physics

Suppose you wish to whirl a pail full of water in a vertical circle without spilling any of its contents. If your arm is 0.93 m long (shoulder to fist) and the distance from the handle to the surface of the water is 15.0 cm, what minimum speed is required?

17. ## Physics

Comic-strip hero Superman meets an asteroid in outer space, and hurls it at 750 m/s, as fast as a bullet. The asteroid is three thousand times more massive than Superman. In the strip, Superman is seen at rest after the throw. Taking physics into account,

18. ## 11Science

A diploid organism has five pairs of chromosomes in each somatic cell. Assuming that no crossing over occurs, how many genetically distinct gametes can this organism produce?

19. ## chemistry homework help!!

CaCo3(s)+2HCl(aq)---->CaCl2(aq)+H2O(l)+CO2 How many grams of calcium chloride will be produced when 27.0g of calcium carbonate are combined with 14.0g of hydrochloric acid? Which reactant is in excess and how many grams of this reactant will remain after

20. ## chemistry

Consider the reaction 3CH4(g)= C3H8(g)+ 2H2(g).Calculate Delta G at 298 K if the reaction mixture consists of 40 atm of CH4 , 0.011 atm of C3H8, and 2.1×10−2 atm of H2.

21. ## Chemistry

How to prepare 1L of 96% v/v ethanol from 99% v/v ethanol? Can you show me the calculation steps?Thanks.

22. ## computer science C++

The variables arr1 and arr2 have been declared as pointers to integers. An array of 10 elements has been allocated, its pointer assigned to arr1, and the elements initialized to some values. Allocate an array of 20 elements, assign its pointer to arr2,

23. ## Chemistry

A string has a length of 84 cm. The string is stretched taut, and both ends are restricted to be nonmoving. Touching the string at which of the following points will not produce a standing wave when the string is plucked?

24. ## Math

A nickel pyramidal paper weight has a square base of sides 5 cm and a height of 3 cm. What is the mass of a dozen such paper weights if the mass of 1 cm^3 of nickel is 8.9g?

25. ## Ochem

Identify the following compound from its IR and proton NMR spectra. C6H10O: NMR: 3.31 (3H, s); 2.41 (1H, s); 1.43 (6H, s) IR: 2110, 3300 cm^-1 (sharp)

26. ## Chemistry

Methane has one carbon and by mass there are three grams of carbon for every gram of hydrogen. How many hydrogen atoms does methane molecule have show work

27. ## AP CHEMISTRY

Sufficient strong acid is added to a solution containing Na2HPO4 to neutralize one-half of it. what will be the pH of this solution? Explain please

28. ## Calculas

A boat is pulled into a dock by means of a winch 12 feet above the deck of the boat. The winch pulls in rope at a rate of 4 feet per second. Determine the speed of the boat when there is 37 feet of rope out. ft/sec??? can someone please tell me which

29. ## 11Science

How many genetically different gametes can be produced from a diploid cell with seven chromosome pairs?

30. ## office procedures

10. If you're introducing the company's president, Mr. Schott, to a visiting sales representative, Ms. West, you would say, A. "Mr. Schott, Ms. West, sales representative for Seascape Graphics." B. "Ms. West, Mr. Schott." C. "Mr. President, Ms. West, sales

31. ## Maths

The 3rd term of an AP is 10 more than the first term while the fifth term is 15 more than the second term.find the sum of the 8th and 15 term of AP.if the 7th term is seven times the first term.

32. ## trig

Describe the possible values of variable a such that (/72) + (/a) can be simplified to a single term. Note: (/a) is the square root of a.

33. ## physics

If you are holding a 20kg dumbbell straight out at arms length assuming your arm is .69 m long, what tourque is the dumbbell exerting on the shoulder?

34. ## statistics

Suppose that 8% of a certain batch of calculators have a defective case, 11% have defective batteries, and 3% have both of these problems. Construct the probability distribution table (categories are defective case/non-defective case, and defective

35. ## English 5 questions

1. During this time period, writers sought to capture the _____________ of the American people during this era of a new postwar economy and society. peace anger anxiety all of the above 2. Like the modernists, postmodern writers focused on _____________

36. ## physics

A man with a mass of 50 kg stands up in a 66-kg canoe of length 4.0 m floating on water. He walks from a point 0.75 m from the back of the canoe to a point 0.75 m from the front of the canoe. Assume negligible friction between the canoe and the water. How

37. ## physics

A density bottle has a mass of 35g when empty,85g when filled with water and 75g when filled with kerosene.Calculate the density of kerosene in g/cm3

38. ## Chemistry

Zinc sulfide and oxygen gas react to form oxide and sulfur dioxide. Determine the amount of ZnO that should be produced in a reaction between 46.5 g of ZnS and 13.3 g of oxygen. What is the mass of the xs reactant? Please show work

39. ## Math

Mrs. Lincoln budgets her monthly take-home pay. The remainder she deposits in her savings account. She budgets 1/3 of her take-home pay rent, 1/8 for car expenses, 1/6 for food, 1/24 for insurance and 1/16 for entertainment. What is Mrs. Lincoln's monthly

40. ## Math

Find a linear equation whose graph is the straight line with the given property. Through (5, 9) with slope 2 I can't find the correct answer. I don't know where I did wrong Thanks.

41. ## math

How much simple interest would Kaitlyn earn on \$300 at 6% for 6 months? A. \$9 B.\$18 C.\$54 D.\$27 mY ANSWER IS (B)

42. ## chemistry

determine the specific heat of a 150.0 gram object that requires 62.0 cal of energy to raise its temperature 12.0 C.

43. ## social studies

Interview a) Interview a teacher in the elementary grades regarding the teacher's social studies instruction. Include at least eight questions. b) Create your own questions such as: i) Do you use a textbook? ii) What do you think of the standards for

44. ## Finite Math

Assume that you randomly select 8 cards from a deck of 52. What is the probability that all of the cards selected are hearts?

45. ## PHYICS HELP

While a person is walking, his arms swing through approximately a 45° angle in .530s. As a reasonable approximation, we can assume that the arm moves with constant speed during each swing. A typical arm is 70.0 cm long, measured from the shoulder joint.

46. ## pennfoster

Which of the following sentences contains a verb in the simple past tense? A. I was working overtime for about six months. B. She would like to join us. C. We helped Joan to pack her things. D. Jenna has driven this route multiple times

47. ## 11Science

Using scientific concepts, explain how can you have your grandfather's eyes and your grandmother's nose.

48. ## Physics

A piano emits frequencies that range from a low of about 28 Hz to a high of about 4200 Hz. Find the maximum wavelength in air attained by this instrument when the speed of sound in air is 336 m/s. Answer in units of m

49. ## maths

the outer edge of a circular track is 440 m long.if is widened by 5m all around,find the cost of widening it at rate of 8 rs per m square?

50. ## Math / Physics

Many birds drop clams or other shell fish in order to break the shell and get the food inside. Suppose a crow drops a shell from a height of 5.2m. How long does it take to reach the ground?

51. ## Physics

Mercury has a density of 13600 kg/m3. At what depth in millimetres is the pressure in mercury equal to that of standard atmospheric pressure? (take std pressure= 101 Pa)

52. ## Chemistry

Silicon Carbide, SiC,is prepared using the chemical reaction: SiO2 + 3C ---> SiC +2CO How many grams of SiC can be produced from 15.0g of C? Thanks!

53. ## Physics

For a rollercoaster, a hydraulic catapult propels the car to the top of the ride, at a height of 430 ft. If the car and occupants weigh 1208 lb, what would be the potential energy of the loaded car at the top in joules?

54. ## physics

The power output of a tuba is 0.39 W. At what distance is the sound intensity of the tuba 1.4 × 10−3 W/m2? Answer in units of m

55. ## math

Assume that you randomly select 8 cards from a deck of 52. What is the probability that all of the cards selected are hearts?

56. ## office procedures

13. The global workplace refers to A. handling the process of sending international mail. B. understanding the development of e-mail. C. learning how to deal with clients and customers from other countries. D. taking classes in a foreign language. My

57. ## probability

The probability that a student passes Biology is 0.35 and the probability to pass Chemistry is 0.63. If the probability to pass both Biology and Chemistry is 0.4, what is the probability that he will pass either Biology or Chemistry?

58. ## chemistry

a human being requires 2700Kcal of energy per day.if the enthalpy of combustion of glucose is -1350Kcal/mol.how many grams of glucose a person has to consume everyday?

59. ## physics

A 42kg person on a merry-go-round is traveling in a circle with a radius of 2m at a speed of 5 m/s. It asked for the acceleration which I got a 12.5 m/s (second square) and it also asked for the net horizontal force which I got at 525 N but I couldn't

60. ## math

You select 8 cards randomly from a deck of 52 cards. What is the probability that all of the cards selected are face cards (i.e. jacks, queens, or kings)

61. ## math

the lawn order lawnmower factory can produce 12 lawnmowers in 8 hours. How many hours will it take the actory to produce 30 lawnmowers.

62. ## chemistry

1) Empirical formula for zinc chloride (show calculation) 2) Balanced chemical equation for the formation of zinc chloride from zinc and HCL

63. ## chemistry

Suppose you need 2.08 g of chlorine gas (Cl2) What volume at STP would you need to use?

64. ## geometry

A rhombus has base angles of 60 and 120. The length of each side is 16. What is the area of the rhombus?

65. ## chemistry

When 16.3 g of magnesiumm reacts with 4.52 g of oxygen, how many grams of magnesium oxide will be performed? Identify the limiting and excess reactants.

66. ## chemistry

Write balanced equation for: Al + NH4CLO4 (yields) Al2O3 + AlCl3 + nitrogen monoxide gas, and steam

67. ## math

A group of students who are selecting 2 of their group at random to give a report, but assume that there are 5 males and 3 females. What is the probability that 2 females are selected? 2 males?

asked by math hates me :(
68. ## Chemistry

the equation is TiCl4 + O2 (yields) TiO2 + 2Cl2. How much titanium(IV) chloride must react with excess oxygen to prepare 175 grams of the pigment? The reaction is found to be 85% efficient? (%yield)??

69. ## Math, geometry

The perimeter of a rectangular red sticker is 30 millimeters. The sticker is 4 millimeters tall. How wide is it?

70. ## algebra

Cut a piece of paper to form a triangle shape. Tear off the three corners of the triangle. Then put the three corners together. Describe what you see. What mathematical truth does this activity illustrate? I did this what mathematical truth is it and why?

71. ## Math

Players on Team; Tennis 2, Basketball 5 A community center has 3 tennis teams and 5 basketball teams. No one is on both teams. How many athletes are there? My answer is 31 athletes. Is this right?

72. ## MATH

A silver dollar is dropped from the top of a building that is 1398 feet tall. Use the position function below for free-falling objects. (Round your answers to 3 decimal places.) s(t) = -16t2 + v0t + s0 (a) Determine the position and velocity functions for

73. ## Math

A model of s skyscraper is 1.6 in. long,2.8 in. wide, and 11.2in. high.The scale factor is 8 in. 250 ft. What is the actual dimension of the skyscraper.

74. ## calculus

A hunter at a distance dx from a coconut tree points the nuzzle of his gun directly at a monkey sitting on the tree at a height dy. The monkey sees the hunters and drops vertically from the tree at the very instant of firing. Will it be hit by the bullet?

75. ## Physics

A car travelled at an average speed of 200km/h. What distance does it cover in 10minutes.

76. ## physics

High-voltage power lines are a familiar sight throughout the country. The aluminum wire used for some of these lines has a cross-sectional area of 4.7 10-4 m2. What is the resistance of ten kilometers of this wire?

A silver dollar is dropped from the top of a building that is 1398 feet tall. Use the position function below for free-falling objects. (Round your answers to 3 decimal places.) s(t) = -16t2 + v0t + s0 (a) Determine the position and velocity functions for

78. ## us history

The Socialist party a.) stood at its pinnacle in the early 1900's. b.) elected 33 candidates as mayor in the early 1900's. c.) elected two socialists to Congress in the early 1900's. d.) All of the above. I say it is d.) all of the above, am I right?

79. ## Physics

A 19.0 ohm, 9.00 ohm , and 8.00 ohm resistor are connected in parallel to an emf source. A current of 9.00 A is in the 9.00 resistor. Find the Potential difference across the source. How do i solve this?

80. ## math

An invoice quotes a price of \$620 subject to discount of 30%, 15%, and 5%. What is the selling price price? round off to the nearest cent. A.\$310.00 B.\$350.46 C.\$434.00 D.\$368.90 I need help

Manny loves to eat Cajun pizza. Each square inch of pizza is 8 calories. He orders a slice of pizza from a pizza with a diameter of 16 inches that is cut with a central angle of 20 degrees. How many calories does he eat? Answer A. about 89 calories B.

82. ## chemistry

You are given a small bar of an unknown metal, X. You find the density of the metal to be 11.7 g/cm3. An X-ray diffraction experiment measures the edge of the unit cell as 5.12 angstroms. Assuming the metal crystallizes in a face-centered cubic lattice,

83. ## math

A square kitchen has an area of 100 square feet. What is the kitchen's perimeter?

84. ## math

find the whole-number possibilities for the lengths of the bases of a trapezoid with a height of 1m and an area of 3m squared. Explain how you found your answer

85. ## physics

a car of mass 1600kg,travelling at a speed of 30ms to the left,collides head-on with 0ms to the right,the two vehicles move together as a unit in a straight line after the collision.calculate the velocity of the two vehicles after collision.2.do the

86. ## Chemistry

A solution was made by dissolving 62.07grams of a compound in 500g of water. The compound was not ionic. The freezing point of the solution was measured and found to be -1.86degrees celsius. The molar mass of this compound can be calculated to be? I know I

87. ## geometry

for linear pair angle AOC n BOC, 2 m angle AOC= 3 m angleBOC .Find measure of each of them

88. ## emergency physics

The 2nd harmonic of a string of length 40cm and linear mass density 1.11g.m has the same frequency as the 5th resonance mode of a closed pipe of length 1.4m. Find the tension in the string. use 340 for speed of sound

89. ## CHEMISTRY hw

enter the net ionic equation, including phases, for the reaction of AgNO3(aq)with Ba(OH)2(aq). 2AgNO3 + Ba(OH)2--->2AgOH +Ba(NO3)2

90. ## Probability

A card is drawn from a standard deck of cards. Find P(A U B) in each part. A= {getting a heart}, B= {getting an even number} A= {getting a club}, B= {getting a red card} A= {getting an ace}, B= getting a black card} A= {getting a prime}, B= {getting a

91. ## chem

Balance the equation and answer in terms of moles. Chlorine gas can be produced commercially by passing an electric current through a con-centrated solution of sodium chloride (brine). The unbalanced equation is NaCl(aq) + H2O(`) ! NaOH(aq) + Cl2(g) +

92. ## Chemistry

A concentration cell based on the following half reaction at 317 K (Cu^2+) + (2e-) --> (Cu) SRP = 0.34 V Has initial concentrations of 1.33 M Cu2+, 0.393 M Cu2+, and a potential of 0.01665 V at these conditions. After 4.1 hours the new potential of the

93. ## Physics

Part(1 of 3) You dip your ﬁnger into a pan of water twice each second, producing waves with crests that are separated by 0.17 m. Determine the frequency of these water waves. Answer in units of Hz Part(2 of 3) Determine the period of these water waves.

94. ## Physics

Mercury has a density of 13600 kg/m3. At what depth in millimetres is the pressure in mercury equal to that of standard atmospheric pressure? (take std pressure= 101 Pa)

95. ## 11Science

A young boy needs a bone marrow transplant, which requires a closely matching genetic donor. Who would be an ideal donor?

96. ## Chemistry - Mole Ratio

How many moles of oxygen are produced from the decomposition of 3.4g of hydrogen peroxide? How many molecules of O2 are produced?

97. ## Math

A group of students who are selecting 2 of their group at random to give a report, but assume that there are 5 males and 3 females. What is the probability that 2 females are selected? 2 males?

how much heat will be liberated if 37.8 g of Fe2O3 is allowed to react with 18.7 g of aluminum. Fe2O3(s) + 2Al(s)--> Al2O3(s) + 2Fe(s) + 851.5kJ

A balloon isin the vertical plane of two consecutive milestones of a road. The angles of depression of the stones as viewed from the balloon are 15 degrees and 17 degrees. Find the height of the balloon if (a) the stones are on opposite sides of the

100. ## physics

A particle is moving clockwise in a circle of radius 1.54 m. At a certain instant, the magnitude of its acceleration is a = 26.0 m/s2,and the acceleration vector has an angle of θ = 50° with the position vector, as shown in the figure. At this instant,

101. ## Algebra 2

Evaluate the discriminant of each equation. Tell how many solutions each equation has and whether the solutions are real or imaginary. y=9x^2 - 24x y=-2x^2 + 3x - 5 y=-4x^2 - 4x - 1

102. ## Math

Assume that you select 2 coins at random from 5 coins: 3 dimes and 2 quarters. What is the probability that all of the coins selected are dimes?

103. ## SOC313: Social Implications of Medical Issues

Assume a position either for or against managed care. Find two articles supporting your position as it relates to the client population in this course. The post will contain: • A statement identifying a support of or opposed to position • Support of

104. ## Civics

Which statement about the relationship between the judiciary and the federal bureaucracy is false? The federal bureaucracy is subject to the authority of the judicial branch. If a court finds fault with government action, it can issue an injunction. =The

105. ## accounting

Bryan company budgets sales of 1,800,000, fixed costs of 1,000,000 and variable costs of 1,080,000. what is the contribution margin ratio for Bryan Company

106. ## Art

Today, decisions in planning, selecting, and/or creating artwork for public display are made in the following way. Choices are: A. They are the decision of the artist B. by collaboration among the community, artist, and local government. C. They are the

107. ## chemistry

How do you make a 3 m solution of kbr? How many moles of kbr are in 1 liter of a .03 m solution?

108. ## algebra

how many pounds of cashew nuts that sell for 2.00 a pund should be mixed with peanuts, which sell for 80 cents a pound to make a 10 pound mixture that sells for 1.28 a pound

109. ## emily

What is the potential halfway between two point charges spaced 1 mm apart if q1=10 micro culumbs and q2= -5 micro culumbs

110. ## Math

(6q^6)^-4 When I worked this I got 1/1296q^24. One of the choices given was 1/1296q^-24. The other choices were: 6q^1296, 1296q^2, 6q^-24. Is the answer any of these choices?

111. ## physics

A racing car has a mass of 1250kg. when the brake pedal is pushed down a constant breaking force of 10 000 N is exerted on the car. Calculate the acceleration of the car.

the story name is the fosbury flop by rich wallace basedon the passage readers can conclude that compared to other styles of jumping ,the fosbury flop?

113. ## Physics

Locomotive exert on a 12560-kg boxcar to make it accelerate forward at 0.38 m/s2. How long will it take the boxcar to reach its cruising speed of 112 km/h (69.6 mph or 31.1 m/s)?

114. ## math

37. A person deposited \$500 in a savings account that pays 5% annual interest that is compounded yearly. At the end of 10 years, how much money will be in the savings account?

115. ## Civics

Which statement about the relationship between the president and the Cabinet is false? =Because the president is so busy, members of the Cabinet often have a good deal of leeway in the running of their departments. Not all executive departments are subject

116. ## maths..

if a,b,c,d are distinct integers in AP, such that d=a^2 + b^2 + c^2, then find a+b+c+d. options are as follows:- (a) 0 (b) 1 (c)2 (d) none of these

117. ## Precalculus

A woman who is 6 feet tall stand near a light that is 13 feet tall. Find a function for the length of her shadow in term of her distance from the base of the lamp.

118. ## algebra

A man is 4 times as old as his son.After 16 years he will be only twice as old as his son. find their present ages.

Ln 4 r^2 =3

120. ## physics

An apple weighs 2 KG. The earth exerts a force of 20 Newtons on the apple. How fast does the apple fall ? ( 1 Newton = kg/m/s2)

121. ## physics

A rocket has a per-ignition mass of 1100kgs-1 producing a thrust of 10000N. How long after ignition of the fuel will the rocket lift off? also explain how is it possible for a rocket to accelerate in space. (i cant work it outt. i know it involves the

122. ## gender

What arw aome example of someone being sexist

123. ## music

A lyrical movement or piece for solo voice with instrumental accompaniment is called a/an A. ostinato. C. operetta. B. aria. D. chorus.

124. ## Chemistry

35 grams of sodium phosphate are mixed with enough water to make 3.5L of solution having a densityof 1.045g/mol. Find the concentration of sodium phosphate in ppm. Using the same information, find the molarity of the sodium and phosphate ions.

125. ## algebra

a lab technician has a 15% alcohol solution. She wants to make 100 gallons of a 29% solution. How much of the 15% solution should she use?

126. ## Physics

A 40.7kg wagon is towed up a hill inclined at 18.1 degrees with respect to the horizontal. The tow rope is parallel to the incline and has a tension of 139N in it. Assume that the wagon starts from rest at the bottom of the hill, and neglect friction. The

127. ## Physics

You've got a conducting hollow sphere of rradius 0.2 m and a charge of 20 micro culumbs. What is the potential of the sphere at distance r from the center if : r=0.1 m? r=0.2 m? r=0.3 m?

128. ## calculus

A conical tank has a diameter of 9ft and is 12 ft deep. If the tank is filled with water of density 62.4 ft/cubic ft, how much work is required to pump the water over the top?

1. Which way of asking for action carries the highest level of politeness? (Points: 5) A polite order An indirect request A question (*) An order 2. Which of the following statements most effectively applies the you-attitude? (Points: 5) "We began

130. ## ap chem

: 1.0 L of an unknown gas was allowed to effuse through a small opening under constant pressure conditionssuppose you have two 1-liter flasks, one containing n2 at STP, the other containing CH4 at STP

solve and check each of the following quadratic equation (1)x^-9x=0 (2)x^+8x=0 (3)x^=6x (4)x^=-3x

132. ## statistics

The mean weight of 40 students is 50 kg. One of the student leave and is replaced by another student which reduces the mean weight of the class by 0.5 kg. If the weight of the student who left is 65kg, what is the weight of the student who joined the

133. ## Chemistry-help

Posted by anne on Wednesday, February 15, 2012 at 3:20pm. How to prepare 1L of 96% v/v ethanol from 99% v/v ethanol? Can you show me the calculation steps?Thanks.

134. ## chemistry

A 0.4515 g sample of pure CaCO3 was transferred to a 500 mL volumetric flask and dissolved using 6M HCl then diluted to volume. A 50.00 mL aliquot was transferred to a 250mL Erlenmeyer flask and the pH adjusted. Calmagite was used as an indicator the

135. ## English

love at first sight the ball romeo sees her first. their first words are a shared sonnet analyse the reason for this. analyse the language and the imagery what do we learn about her feeling? ROMEO AND JULIET

136. ## Physics

1. A model of a helicopter rotor has four blades, each 2.50 m in length from the central shaft to the blade tip and is rotated in a wind tunnel at 1800 rev/min, a. what is the linear speed of the blade tip in m/s? b. what is the radial acceleration of

137. ## chemistry

The amount of Fe in a 2.0008 g sample of an iron ore was determined by a redox titration with K2Cr2O7. The sample was dissolved in HCl and the iron brought to a +2 oxidation state. Titration required 26.48 mL of 0.034 M K2Cr2O7. Calculate the iron content

138. ## chemistry

How many grams of carbon dioxide, are needed to completely react with 112 grams of Fe

140. ## Math

Last Saturday Michaela rented 4 movies from the video store. This Saturday she rented 2 movies. Let x represent the cost of renting each movie. Write and simplify an expression for how much more Michaela spent last week renting movies. Please help me work

141. ## American Government

Why aren't all forms of discrimination unconstitutional? In what cases might it make sense for the government to discriminate between types of people?

142. ## chemistry

describe how to prepare a .50 m solution of lead nitrate using only 100.00 mls of water. aslo discribe how to prepare a .50m sloution of sodium iodide using only 100.00 mls of water. explain the differences that exist between these two solutions. OK i have

143. ## trig

If cosecant of theta equals 3 and cosine of theta is less than zero, find sine of theta, cosine of theta, tangent of theta, cotangent of theta and secant of theta

can you please check my answers to the questions i realy need to check them if they right or wrong

145. ## physics

A table is 5 feet tall, a puck slides off the table at 2 m/s. How long does it take to hit the ground ?

146. ## Accounting

Hayes Warehouse distributes hardback books to retail stores and extends credit terms of 2/10, n/30 to all of its customers. During the month of June, the following merchandising transactions occurred June 20 Purchased books on account for \$720 from Cook

147. ## math

rename the fraction 2/9 in eighteenths

148. ## algebra

Explain the words relation and function. Include in your explanation how the meanings of the two words differ. Give a real-word example of a relation that is not a function. Is it possible to give an example of a function that is not a relation? If so,

149. ## physics

a motorbike has a mass of 300kg, and is being ridden along a straight road. The rider sees a traffic queue ahead. He applies the brakes and reduces the speed of the motorbike from 18m/s to 3 m/s. Use this equation to calculate the kinetic energy lost by

150. ## language

How does language allow self-reflection, organize perceptions, and allow hypothetical thought? Explain the connection between language and perception. Use a specific example to illustrate this connection.

151. ## Physics

The tension in a string from which a 5.4kg object is suspended in an elevator is equal to 53.02N. What is magnitude of the acceleration a of the elevator? The acceleration of gravity is 9.8 m/s^2

152. ## Chemistry

How much distilled water must be added to .85% solution Of NaCL to make a 70% solution of NaCl

153. ## geometry

point A is located at (1,5) and point B is located at (3,2). What is the length of line segment AB in simplest radical form

154. ## geometry

The lengths of the sides of a rectangle become 4 times greater than the original measurements. Which statement is true about the rectangle? A. Its area becomes 4 times greater, and perimeter becomes 16 times greater. B. Its area becomes 16 times greater,

155. ## physics

Assume that the Earth is spherical and recall that latitudes range from 0° at the Equator to 90° N at the North Pole. Consider Dubuque, Iowa (42.50° N latitude), and Guatemala City (14.62° N latitude). The two cities lie on approximately the same

156. ## Math

Ok so you're supposed to solve the system by method of substitution. And the problem is: -2/3x + y = 2 2x - 3y = 6 So i put y= 2/3x into the second equation which looks like: 2x - 3(2/3x + 2) = 6 and then 2x-2x-6=6 So like everything cancels out? So then

157. ## Math

a ship leaves sydney heads and travels 45 km due east. it then returns and travels 86 km due north. how far is it from its starting point? please guys step by step.. thank you in advance.

158. ## physics

a motorbike has a mass of 300kg, and is being ridden along a straight road. The rider sees a traffic queue ahead. He applies the brakes and reduces the speed of the motorbike from 18m/s to 3 m/s. Use this equation to calculate the kinetic energy lost by

159. ## PHYSICS

You've got a conducting hollow sphere of rradius 0.2 m and a charge of 20 micro culumbs. What is the potential of the sphere at distance r from the center if: r=0.1 m? r=0.2 m? r=0.3 m? i need it step by step with explanations and solutions

160. ## Accounting

Hayes Warehouse distributes hardback books to retail stores and extends credit terms of 2/10, n/30 to all of its customers. During the month of June, the following merchandising transactions occurred June 20 Purchased books on account for \$720 from Cook

161. ## Pre- Algebra

Can someone please explain how to do this problem: 7n-5=10n+13

162. ## trig

from an observer tower, a ff.above the level of a river,the angle of depression of a point on the near shore is theta and that of a point directly beyond on the far shore is FI. show that the width of the river is a (cotan theta=p+q/r)

163. ## chemistry

How many grams of carbon dioxide, are needed to completely react with 112 grams of Fe

164. ## Physics

What is the free-fall acceleration in a location where the period of a 0.594 m long pendulum is 1.55 s s? Answer in units of m/s^2 Show equation too please.

165. ## Chemistry

If 2.44 moles of H2 are reacted with excess Cl2, how many moles of Hcl can be produced? Please explain.

166. ## HARDEST QUESTION IN THE WORLD

One day, a person went to horse racing area, Instead of counting the number of human and horses, he instead counted 74 heads and 196 legs. Yet he knew the number of humans and horses there. How did he do it, and how many humans and horses are there?

asked by HARDEST QUESTION IN THE WORLD
167. ## Physics

The distance between two successive crests of a certain transverse wave is 1.42 m. Eight crests pass a given point along the direction of travel every 19.5 s. Calculate the wave speed. Answer in units of m/s

168. ## science

a 100 mL {100 grams} of water at 4.0 degrees celsius is heated until its tempurture is 37 degrees celcus. if the specific heat of water is 4.18 joules/grams degrees celcus calculate the amount of heat energy needed to cause this rise in tempurture

169. ## chemistry

Calculate the grams of K2CO3 required to prepare 546.0 mL of a 0.789 g/L K+ solution.

170. ## Algebra 1

I need some help with Direct linear variation. I had tooken a test, and one of the questions on there said " Which equation represents a direct linear variation?" The answers were A ; y = 1/x B ; y = x + 2 C ; y = x squared D ; y = 1/2x . I choose B . But

171. ## physics

The rider sees a traffic queue ahead. He applies the brakes and reduces the speed of the motorbike from 18 m/s to 3 m/s. Use the equation in the box to calculate the kinetic energy lost by the motorbike. 1 over 2× mass × speed

172. ## chemistry

Can you determine the molecular formula of a substance from its percent composition?

173. ## math

Sunae's group of close friends are going to fifth grade in September. All are going to Belleview Elementary and their homerooms will be rooms 12, 14,or 16. All of her friends but 4 are going to room 12, all but 4 are going to room 14, and all but 4 are

174. ## family

What is extended family? Whatis a binuclear family?

175. ## accounting

the gross profit rate represents:

176. ## chemistry

The volume of a gas at 24C and 0.21 atm is 36 mL. What volume will the same gas sample occupy at standard conditions?

177. ## algebra

The temperature F, in degrees Fahrenheit, that corresponds to a temperature C, in degrees Celsius, is given by the equation F = (9/5)C + 32. If you graph this equation for 0 ¡ÜC ¡Ü100, you will notice that the point whose coordinates are (45,113) is on

178. ## physics

a satelitte is in orbit about the earth. its orbital radius 7.47x10^7. mass of satelitte 6862kg & mass of earth 5.97x10^24kg determine the orbital speed in mi/s 1mi/s=1609m/s

179. ## Biology

Why can this statement not be evaluated by the scientific method "Trees emit psychic screams when you cut them down."?

180. ## Pre-Algrebra

One gallon of liquid occupies 231 cubic inches. Write a rule that expresses the number of gallons g(c) as a function of the number of cubic inches c. Choices are: g(c)=c/231 g(c)=132/c g(c)=231c g(c)=132c

181. ## algebra II

How do you verify inverses? the question is y=3x-3... we know how to make an inverse but how do you verify it using composition?

182. ## chemistry

Calculate the volume of 2,180 ppm Pb(NO3)2 solution required to prepare 1.2550 L of a 0.0021 M Pb2+ solution.

183. ## Calculus-derivatives

Explain how to do these questions~ 1. An object moves in a straight line with its position at time t seconds given by s(t) = 3-2t+t^2, where s is the measured in metres. At what time is the object not moving? 2. Determine the coordinates of the point(s) on

184. ## james giles math

A radio station played 15 songs in 1 hour

185. ## math: elapsed time

i need a website that would teach me every thing about elapsed time. it's really kind of confusing to me

186. ## help math

solve each of the following quadratic equation (1)x^2=5x+6 (2)x^2+9x=10

187. ## Math

If I financed a computer that costs \$1500. If the simple interest rate is 21%, how much will the I owe after one month if no payments are made?

188. ## Geometry

Linda has two fish tanks in the shape of rectangular prisms. Each of the sides of the second fish tank is 3 times greater than the sides of the first fish tank. If Linda fills both the fish tanks completely with water, the volume of water in the second

189. ## Algebra

Currently, Jodi has a collection of 44 CDs and Veronica has a collection of 22 CDs. Jodi is adding 2 CDs per month to her collection; Veronica plans to add 4 CDs per month. a. Write a system of equations for this situation. Explain your method. b. Graph

190. ## math

You are a lab technician and must create 250 ml of a 17% salt solution. You have available three stock solutions. You have a one liter container of a 5% salt, a 500 ml container of a 28% salt solution, and a 400 ml container of a 40% salt solution. Show

191. ## math

You are a lab technician and must create 250 ml of a 17% salt-solution. a. If you have 500 ml of 28% salt-solution, how many milliliters of it should you mix with water in order to create 250 ml of a 17% salt-solution? b. If you have 400 ml of 40%

192. ## English

Use a pronoun that can take the place of each group of words. Use he, she, it, we or they 1. Karen and I 2. the hoses 3. Dad and I 1. we 2.they 3.we

193. ## chemistry

what volume of butyric acid would be needed to make 25.0mL of a 1.0M solution?

194. ## algebra

can anyone solve this please it is hard In a basketball game, Garrett and Logan scored a total of 19 points. Logan and Ray scored a total of 14 points. Logan scored as many points as Garrett and Ray together. How many points did each player score?

195. ## physics

A train has a velocity of 72km/h. How far does it travelled in 1/2minutes

196. ## physics

(ignore the other question i posted this is the right one) A rocket has a pre-ignition mass of 1100kg. On ignition it burns fuel at rate of 20kg s-1 producing a thrust of 10000N. How long after ignition of the fuel, will the rocket lift off? also explain

197. ## geometry

Freddy has a triangular flag. He wants to cut out a similar flag that has dimensions one-third of the original flag. If the area of the original flag is 108 square inches, what is the area of the new flag that Freddy cuts out? Answer A. 12 in2 B. 18 in2 C.

198. ## physics

Why is there always a difference between the experimentally calcuated error for resistance, and the actual components tolerance value?

199. ## algebra

how can i find an example for multiplication, division, addition and subtraction and at least one set of parentheses to write an expression that simplifies to 7, 13, or 17.

200. ## english

2. Marion needs to believe in a ____ (1 point)

201. ## Biology

I have answered all the other questions on this sheet but I am stuck on this one: Why is it fair to assume that the proportion of cells in each phase of the cell cycle represents the proportion of time spent by individual cells? This is to do with the cell

202. ## trig

Prove 1+cos X/1-cos X = (csc X + cot X)squared

203. ## Calculus

Evaluate the following expression: d/dx (integration sign: upper=1 and lower= -3) (2t^3 + 3)dt = I am given the following options: 2t^3 + 3 56 5 -28.0 None of the above Would the result of the expression be 0 or 5???

204. ## STATISTICS

A teacher wants to investigate whether there is a difference between male and female students in the amount of time they spend studying for statistics. What was the statistical test used to analyze the data? Is this a one or two tailed test? Identify Ha

205. ## Science

Label the following inherited or learned Sea turtle laying eggs on a beach=inherit Seal balancing a ball on its nose=learned Spider weaving a web=inherit Birds flying in a v-shape=learned Dogs rolling over= learned A lion returns to the same place everyday

206. ## algebra

can anyone solve this please it is hard In a basketball game, Garrett and Logan scored a total of 19 points. Logan and Ray scored a total of 14 points. Logan scored as many points as Garrett and Ray together. How many points did each player score?

207. ## Chemistry

How many formula units of (NH4)3PO4 are present in 12.25 g of K3PO4? Please explain so I can do these in the future! Very confused.

208. ## english

Two many cooks spoil the broth. (Points : 1) Two many cook To many cooks Too many cooks Two many cooks

209. ## chemistry

what volume of butyric acid would be needed to make 25.0mL of a 1.0M solution? oh i forgot to mention that butyric acid is a liquid with a density of 1.75gr/mL can you please explain the steps more? thanks

210. ## chemistry

what volume of butyric acid would be needed to make 25.0mL of a 1.0M solution? oh i forgot to mention that butyric acid is a liquid with a density of 1.75gr/mL can you please explain the steps more? thanks

211. ## Physics

A tuning fork produces a sound with a frequency of 277 Hz and a wavelength in air of 1.21 m. What value does this give for the speed of sound in air? Answer in units of m/s

212. ## English

am almost did with my parody PARIS Give me thy torch, boy: hence, and stand aloof: Yet put it out, for I would not be seen. Under yond yew-trees lay thee all along, Holding thine ear close to the hollow ground; So shall no foot upon the churchyard tread,

213. ## algebra

Al has 76 nickels and dimes worth\$5.55. How many of each coins does Al have?

214. ## intense algebra

Evaluate 27z^2 + 42z - 5?

I had to describe a picture-the girl has a yellow t-shirt , a brightly colored skirt, blue sandals, purple necklace,two pink bracelets,green earrings. Could you please check? 1.Ella lleva los aretes verdes. 2.La camisa es brillante. El color es amarillo.

216. ## chemistry

a 100 mL {100 grams} of water at 4.0 degrees celsius is heated until its tempurture is 37 degrees celcus. if the specific heat of water is 4.18 joules/grams degrees celcus calculate the amount of heat energy needed to cause this rise in tempurture

217. ## math

There is a bus stop in front of Luann's house.A bus arrives at the stop every 45 minutes and goes into fown.The first bus comes at 7:15am If the bus trip takes 12 minutes, what is the latest bus Luann can take in order to get to town by 1:00pm ?

218. ## physics

Assume that the Earth is spherical and recall that latitudes range from 0° at the Equator to 90° N at the North Pole. Consider Dubuque, Iowa (42.50° N latitude), and Guatemala City (14.62° N latitude). The two cities lie on approximately the same

219. ## Math- Alg 2

Help finding probability involving combinations? What is the probability of winning in this game ( Show calculation and all works) - The board is a number ranging from 1 - 12 - Player place a coin in the desire number 1,2,3,4 etc. - Roll 2 dice - To win

221. ## family

Whats the difference between a nuclear family amd family of orgin?

222. ## physics

A runner dashes from the starting line (x = 0) to a point 84 m away and then turns around and runs to a point 37 m away from the starting point in 30 seconds. To the nearest tenth of a m/s what is the average speed?

223. ## Calculus-derivatives

What is the slope of the tangent of each curve at given point y=√(16x^3), (4,32) If I find the derivative of y=√(16x^3) Will it be 16/-x^3

what is a binominal nomenclature mean? Please explain in a simple manner. Thank you

225. ## Math

Consider the Dosage Formula y=(S/1.73 where y = childfs dosage, a = the adult dosage, and S = the surface area of the body in square meters. The Surface Area Formula is S(w,h)=0.0101w^(.425)*h^(.725) where S = the surface area of the body in square

Thermochemistry determine the final temperature if 45.67 kJ of heat energy is removed from 18.5 g of H2O (g) at 122 degrees Celsius useful information sp. heat H2O (s) = 2.03 J/g(degree C) sp heat H2O (l) = 4.18 J/g(degree C) Sp heat H2O (g) = 2.01

227. ## math

The length of time that it takes for a pendulum to make one complete swing depends on the length of the pendulum. The time in seconds, T, is related to the length in metres, L, through the equation T=2π√ L/9.8

228. ## algebra

Explain the words relation and function. Include in your explanation how the meanings of the two words differ. Give a real-word example of a relation that is not a function. Is it possible to give an example of a function that is not a relation? If so,

229. ## geometry

A regular polygon has an interior angle that measures 90°. Which of the following statements is used to prove that the polygon is a square

230. ## algebra

this is the hardest problem people said it was the hardest andf they can not solve it can anyone solve this please it is hard In a basketball game, Garrett and Logan scored a total of 19 points. Logan and Ray scored a total of 14 points. Logan scored as

231. ## physics

A projectile is shot at an angle of 40.0 degrees with a velocity of 25.0 m/s. If a building is 50.0 m away, will this projectile strike the building, and if so, at what height?

232. ## chemistry

Calculate the volume (mL) of 2.06 M magnesium phosphate solution require to prepare 46.20 mL of 2.3998 %w/v solution of Mg3(PO4)2

233. ## Math

Name two methods that are used to solve Quadratic Equations when they are irreducible.

234. ## Maths

ben wants to buy some new surfing gear he likes a surfing board that is priced at \$360 excluding gst of 15% how much gst would he pay on his surfboard? PLEASE HELP ME

235. ## English

Can you please check these two sentences? to spend much money to safeguard (or: on the safeguard/on safeguarding?) its water resources. The verbs underlined will be included in your test. The others will be tested orally)

236. ## science

how can you determine whether an object has gravitational potential energy or elastic potential energy?

237. ## math

for linear pair angle AOC n BOC, 2 m angle AOC= 3 m angleBOC .Find measure of each of them

238. ## chemistry

Q1) For the reaction, A ¨ B, ƒ¢H‹ = +11.00 kJ mol-1 and Keq is 12.50 Calculate i) ƒ¢G‹ and ii) ƒ¢S‹ at 25 ‹C. [0 ‹C = 273.15 K; R = 8.314 J K-1 mol-1]

239. ## international law

What are the sources of the rules of international law? Are those rules legally binding? Do powerful states like the United States comply with the rules, or ignore them? Why would states bother to comply with the rules when there are no central enforcement

240. ## math:logarithms

prove that:log25+log8*log16/log64 -log14/5+log28=3

241. ## math

how many girls are there girls drink 4 cups e/a of water 7 cups are consume by the boys e/a and coach drinks 9 cups of water with a total of 43 cups consume how many girls are in the team

242. ## algebra

When graphing the equations y =2x -2,y=2x.and y = 2x + 3, what observation can you make about the graphs. Can you make the same observation before graphing the lines? How?

243. ## arithmetic

Laura sees 5 triangles she knows each triangle has 3 corners help laura sjip count to find how many corners are on 5 triangles

244. ## Calculus

Could really use a lot of help here what is the slope of the tangent line to cos(x-y)=xe^x at point (0,3pi/2)

245. ## jane

In an electric field described by E = (20i+60j) V/m calculate the change in potential for a particle that moves from the origin to the coordinates (3,3)m

246. ## English

Just a doubt on my previous post. Isn't "bacteria" plural? Can I use bacterium for the singular? 1) In particular, we prepared (have prepared)a genetically modified bacterium (?), the ..., which can survive using arsenic instead of phosphorous in building

247. ## Geometry

Simon and Jane have rectangular-shaped vegetable gardens. The width of Jane’s garden is double the width of Simon’s garden. The area of Jane’s garden is 4 times that of Simon’s garden. Which statement is true? Answer A. Jane’s garden has the same

248. ## physics HELP MEEE SO CONFUSED

What is the potential halfway between two point charges spaced 1 mm apart if q1=10 micro culumbs and q2= -5 micro culumbs

249. ## physical science

a race car having a mass of 2550 kg is accelerated by a force of 127,500n.what is the accelerration?

250. ## physics

Consider two cars, a very large one like a Hummer (mass 5m) and a small one like a Mini Cooper (mass m), both starting at the same point race toward the edge of a cliff. Assume that each car is accelerated by a constant force (same size force on each car)

251. ## Science/English

Writeacher, now that the grammar is OK, I just want to know if everything is correct from a scientific point of view. Could you please ask your science teacher, Bob Pursley? 1) After meeting with the engineer ......... we became interested in exploring the

252. ## Science

What are the animals in the tropical rainforest becoming endangered? Answer:Because the rainforest is only 5% on the Earths surface and people cut it down What adaptation helps a plant survive in a hot and dry climate? Answer:Its roots because it can get

253. ## budget

Which one of the following budget items would probably be considered a fixed expense? A. Entertainment B. Savings C. Clothing D. Insurance premiums i think c

254. ## English

I got you. (What is the meaning of this sentence? Does it have many meanings according to the context?)

255. ## English

I urgently need you to see if the sentence is OK now. Thank you!! 1) Moreover, this particular bacterium can survive in presence of arsenic and, therefore, won't die until its action of purification is completed. 2) This method is inexpensive and

256. ## math

the paper hats are in the shape of a cone. the radius of the cone in 8 cm and the slant height is 20 cm. how many square centimeters of paper are needed to make each hat?

257. ## math

FIND THE PERIMETER FOR 4YD LONG, 12YD WIDE

258. ## chemistry

Q1) For the reaction, A to B, Delta H= +11.00 kJ mol-1 and Keq is 12.50 Calculate i) delta G and ii) delta S at 25 C (degrees celcius) 0 C degrees celcius = 273.15 K; R = 8.314 J K-1 mol-1]

259. ## Calculus (Integrals and Derivatives)

Evaluate the following expression: d/dx (integration sign: upper=1 and lower= -3) (2t^3 + 3)dt = I am given the following options: 2t^3 + 3 56 5 -28.0 None of the above Would the result of the expression be 0 or 5???

260. ## biology

For this assignment you will be using the course companion Web site, MasteringBiology. View and complete the MP3 tutorial: The Process of Science. and “How Does Acid Precipitation Affect Trees?” After completing the activity, develop two alternative

261. ## chemistry

a gas has a volume of 20 liters measured at 27 degree celcius and 4 atmospheres .What will be its volume at standard temperature pressure?

262. ## English

I tried to reduce the sentences myself though I think you still need to revise it. Thank you very much. 1) We decided to create an effective and inexpensive filter using knowledge of genetic engineering. 2) In particular, we prepared (have prepared)a

263. ## algebra

this is the hardest question people said they can not solve it

264. ## math

Bob and Jack play a shooting game. In this game, they have a net at a distance. The net is made up of 1 mm thick wires. The wires run vertically and horizontally to form a mesh that has 5 mm square openings between them. A bullet 2 mm in diameter must be

265. ## essay

yoyoma here just wondering if someone can help me out with this essay... what grade do u think it deserves? constructive criticism welcomed thanks everyone :)

266. ## science

Scientists performed an experiment to determine whether there is a connection between learning ability and food. They took two groups of 20 mice each, all from the same purebred strain. The mice were deprived of food for 3 days and then given a standard

267. ## Algebra

Find the slope of the given line, if it is defined y = (x + 4)/7 I can't find the answer. I don't understand what went wrong with my calculation. Thank you.

268. ## Spanish

What does Que compras tu para tu madre? Mean

269. ## Geometry

Greg made two similar glass display boxes shaped like triangular prisms. The length of the sides of the base of the first display box is 5 feet, and the length of the sides of the base of the second display box is 10 feet. If the volume of the first

270. ## Maths

The number of apples in a basket is between 60 and 120. If i put these apples into bags of 5, there will be a remainder of 1 apple. If i put these apples into bags of 8, there will be a remainder of 6 apples. Find the total number of apples in the basket.

271. ## math

What is the nearest number of 481, 671, 1781,2021, 1111, 320,501. From 1000

272. ## Math

if the length of a rectangular pyramid is made seven times longer, how many times the volume of the original figure is the volume of the new figure?

273. ## chemistry

If you begin with 0.345 moles of Calcium Nitrate,how many moles of Potassium Phosphate were needed? How many moles of Potassium Nitrate and Calcium Phosphate are produced?

274. ## middle school math level one

what are the actual dimensions of the building in inches? i need help to slove this problem

276. ## Math

Carla has a plate that has 4 equal sides, 2 pairs of parallel sides, and no right angles. Which quadrilateral is it?

277. ## Physics i.e science

Explain why sharpening grass knives help to ease the effort in cutting grass.

278. ## Math

Is 4^33 + 3^44 divisible by 5? Please help ASAP. This is due tomorrow. Thank you very much :)

279. ## Political Science

From the 1970s to the present, a shift in the evolution of public policy moved toward a New Federalism. How did this effect public policy? Was this positive or negative? Why?

280. ## geometry

graph on a rectangular coordinate y-2x+3=0

281. ## Grammar

i treid my best to make the sentnce sound good, but its still sounds funny. can you please correct this sentence for me. Thank You so much! It is not surprising that polar bears in the north are decreasing in population due to glacial deterioration nor the

282. ## algebra

If you are looking at a graph of a quadractic equation, how do you determine where the solutions are?

283. ## physics

A shuffle board table is 5 feet tall. A puck slides off the table at 2 m/s. How far across the room does it travel in 1 second ?

284. ## mats

Factorise into prime factors: 2m^20-1/8

285. ## Chemistry

What is the stoichiometry of elements in c2h6

286. ## geometry

suppose AB is thge diameter of a circle C is any pt on the circumfernce of the circle. wht is the measure of angle

287. ## Math

A cube has all sides with a length of 7k^9n^8. The volume of a cube is found by raising the length of one side of the 3rd power. What is the final value of the coefficient when simplifying the expression? Is the answer 343?

288. ## chemistry

DrBob222- Is STP = to 273K? If so, would i use P1V1/T1 = P2V2/T2??

289. ## chemistry 1

If the mas of liquid nitrogen originally placed in the flask was 1.8 g, what is the density of the nitrogen gas?

290. ## chemistry

Dr.Bob222: I attempted to solve the problem numerous times but keep ending up with the wrong answer. If you would be kind enough to show me the steps I would appreciate it. I'll pose the question once more: The volume of a gas at 24C and 0.21 atm is 36

291. ## algebra

Explain why the point-slope formula cannot be used to find the equation of a line that is parallel to the y-axis.

292. ## math

If y=8(5)^x then write ln y as a linear function of x I don't know how to do this.??

293. ## Differential Euation

How do you find the primes denote derivatives with respect to x. Such as xy'+ 5y= 7x^2, y(2)= 5

294. ## Algebra

How can you us a graphing calculator to determine if a set of equations are inconsistent,dependent, or independent

295. ## math

How do I figure the degree of measure from 18-24 people = 11%

296. ## Science n math

What is the molecular geometry n the electron domain for HCN

297. ## math

I am a set of 5 whole numbers that are less than 30. My median is 10. My range is 15. My mode is 10. The smallest number in my set is 10. My mean is 14. What are my numbers?

298. ## help in math

solve and check each of the following quadratic equation (1) x^2=6x (2) x^2=3x (3)x^2=17x (4) x^2=5x+6 (5) x^2+9x=10

299. ## Algebra

The Hansons are considering two possible vacation destinations. A trip out west will cost \$1075 in total airfare plus an average of %450 per day in expenses. A trip south will cost \$1500 in total airefare plus an average of \$365 per day in expenses. How

What is the potential halfway between two point charges spaced 1 mm apart if q1=10 micro coulombs and q2= -5 micro coulombs? Attempt at solution: no idea but need to get this right our homework is graded

301. ## Maths

Abena's middle finger is 5cm long how long is it in mm?

302. ## Chemistry

#sig fig in 6.0223010000 x 10-24 = ? Can someone help me solve this equation showing the steps involved to get the answer?

303. ## Laws

Sam sold his horse to Ben for \$4000. No date or consideration was stipulated for the delivery of the horse. While still in the possession of Sam, the horse gave birth to a colt. Who has the right to the colt?

305. ## biology

Create and describe a data set including independent and dependent variables (be creative) and a table of the data. Explain how this would best be graphed to accurately present the results of the research (type of graph, axes, and scale limits – minimum

306. ## Social Studies

Who was able to find work more easily during the Great Depression....men or women? Thanks

307. ## percents

Dealer sold 26 of 34 boats. What percentage was not sold?

308. ## math

In the following problems, Θ = 20 + units digit of your day of birth. For example, if you were born on April 1st, then Θ = 20 + 1 = 21. If you were born on March 30th, then Θ = 20 + 0 = 20. You can solve any three of the seven given problems. 1. Alok

309. ## English

Please help write a reaction on this Article, I want to give good presentation. How can I make it interesting? Thank you! So, far I think the Author is Energy literate and motivates readers through his words. Please tell me how I can include "Energy

310. ## science

time travel question in km 0 - 240, a vehicles started at 30km at 2:30, where would the truck be at 3:30?

311. ## math

A student was given the function f(x) = x2 and asked to write the result of translating this function 1 unit to the left. The student wrote the following: g(x) = (x+1)2. Is this statement correct? Explain.

312. ## physic

if the beam current in a particular TV is 50 micro A and the charge on a single electron is 1.6x10^-19 C. how many electrons hit the face of the picture tube in one second?

313. ## math

what is 14 decreased to 12

314. ## Algebra

Find the slope of the given line. 2x + 3 = 0 Do I use the slope formula? I don't know how to do it. Thanks

315. ## Calculus

Find dy/dx if x^2+y^2= /5 *(/5= square root of 5)*

316. ## Science

What adaptations do ALL organisms in a tropical rainforest need for survival?

317. ## analytical chemistry

Calculate the volume (mL) of 2.81 M magnesium phosphate solution require to prepare 43.20 mL of 2.1000 %w/v solution of Mg3(PO4)2 . [Answer in 3 decimal places].

318. ## algebra

i need to know how to do (4m -3power n5power)0 / mn

319. ## Math

Posted a question on the 2/12/12 at 3:48PM and was never given an answer. Guess the math problem is too hard for anyone to solve. How do they expect me to answer it if no one else can? Thanks for your time. Parker.

320. ## physical science

A child pushes a book a distance of 17m. If 5J of work was done, how much force was used?

321. ## English

Could you check this sentence, please? 1) Great Britain became the master of a powerful empire that brought her (Britain) in contact with various cultures.

322. ## spanish

How do i say following: I have nothing left to say. No tengo nada que digo? Thanks in advance!

323. ## Spanish - beginner

Is this right? 1. How does it look like? 2. Describe yourself. 3. Who is he? 4. He receives much money. 1. Don't know how to say when something "looks like".. 2. Describes tu 3. Que es? 4. Recibes muchos dineros? Many thanks in advance!

324. ## pschology

what is the educational implication of middle age?

325. ## pre-calculus

What is the domain of (x+2)/(x-2)?

326. ## all subjects

are there on line tutor for sale

327. ## random

How many 4 digit combinations can you get using numbers 0-9..?

328. ## Calculus (Integrals)

Evaluate the following expression: d/dx (integration sign: upper=1 and lower= -3) (2t^3 + 3)dt = I am given the following options: 2t^3 + 3 56 5 -28.0 None of the above

329. ## Math

in the equation 6p+4(70-P)=300. how do i find the value of p ?

330. ## algebra

Explain why the point-slope formula cannot be used to find the equation of a line that is parallel to the y-axis. When graphing the equations y =2x -2,y=2x.and y = 2x + 3, what observation can you make about the graphs. Can you make the same observation

331. ## math

Which of the following would be simplified the most if it were multiplied by 3/13. a. 13x+39 b. x+39/13 c. x+9/3 d. 3x+9

332. ## Math

Simplify: (-h^4)^5 Would it be -h^20 or h^20

333. ## us history

what is the term referring to the growing number of older Americans as the baby boomers age?

334. ## math

what is the estimated product of 3 2/3 x 5 1/9

335. ## math

What is the meaning of |x+3| (absolute value)and what is its purpose? In other words, where would we use this in real life and why?

337. ## Chemistry

A liquid has a 1.5g/cm^3. Calculate the mass of 2000cm^3 of this liquid?

338. ## Calculus

I have to use integration by parts to integrate tan^-1 (1/x)dx. I'm not sure what to use as u or dv. We were taught to use uv-integral of (vdu) to do this.

2/3+7/9

340. ## math

What is array

1+4(x)

342. ## trig

cos^4 15-sin^4 15 with out using calculator

343. ## physics

How does tidal energy work

345. ## math

wats the positive root of the equation x^-3x=10?

346. ## Calculus

if vector a is parallel to vector b, but in the opposite direction, express the magnitude of a+b in terms of magnitudes of vectors a and b

347. ## Pre-Algebra

Can somebody help me... I need to know how to do 2x - 8 = 16

348. ## English

Here is a presentation entitled "treatment plant from arsenic and pathogenic bacteria". I don't know how to check it as I'm not familiar with the content. I'd like you to help me check the grammar. The paragraph contain long-winded sentences with no

2x + 4

350. ## MATH

does 2+2-2+2-2+2-2-2+2=2 ??

351. ## Math

Round 33.56 to the nearest tenth?

352. ## math

4240 concert tickets sold for two concerts if concertA sold twice as many as concertB how many did concertA sell

353. ## algebra

how do you graph c =40t+ 250

354. ## math/calc

find y'' if x^4+y^4=16

356. ## Spanish

How do you say "I want a cat for christmas" in Spanish

solve and check each of the following quadratic equation (1)x^+x-6=0 (2)x^+8x+15=0 (3)x^+2x+1=0 (4)x^-3x-4=0 (5)x^-4x-32=0

358. ## geography(africa)

which is not a direct rule?

359. ## College algebra

I would like to build a fench for my poodle 8 feet long and 4feet high. What is the inches, feet yards and miles or meters. and determine the perimeter.