# Questions Asked onMay 1, 2016

1. ## Dissociation Equations Answer Check

1. Write the equation for the dissolution of potassium iodide in water. KI(s) + H20 --> K+ (aq) + I- (aq) 2. Write the equation for the dissolution of magnesium bromide in water. MgBr2(s) + H20 --> Mg2+ (aq) + 2Br- (aq)

2. ## Art

Which of the following items is the best example of functional art? Stones. A vase. (MY ANSWER) A paper clip. A rag.

3. ## Language Arts, can anyone check?

1. Which statement is shared by both "Zoos: Joys or Jails?" and "Why Do We Need Zoos?" a. clearly stated claim b. humorous introduction c. unsupported facts d. one-sided argument 23 Read the passage. What technique is the author using to develop point of

4. ## Math

Given the box plot, will the mean or the median provide a better description of the center? box plot with min at 6, Q1 at 7.5, median at 8, Q3 at 23, max at 32.5 The mean, because the data distribution is symmetrical The median, because the data

5. ## Exponential Modeling

The half-life of a radioactive substance is one day, meaning that every day half of the substance has decayed. Suppose you have 100 grams of this substance. How many grams of the substance would be left after a week?

6. ## Language Arts

In Act II, Scene 4 of "A Christmas Carol: Scrooge and Marley", what are the two women and the man selling to Old Joe? A. items they stole from Scrooge's room after he died - (I believe it's this one.) B. items Scrooge gave them before he died C. items

7. ## language arts

Both "Grandma Ling" and "your little voice . . ." use imagery to convey the emotions or attitudes of the speakers. Choose one of these poems. In a paragraph, discuss how the poet uses imagery to present the speaker's feelings. Support your response with

8. ## MATH

The median number of goals scored by 8 players in a certain soccer season is 5. The range of the number of goals scored by those players that season is 4. Determine if the following statement is true, is false, or does not contain enough information. At

9. ## mathematics-change of subject of formula

A=πr√(h^2-r^2) make "r" the subject of the formula show workings #thanks

10. ## Exponential Modeling

Suppose a tortoise is 2000 feet from the ocean. Each day the tortoise travels one-half of the remaining distance to the ocean. Use this information to: Compute the remaining distance to the ocean after 4 days of travel.

11. ## economics

Does south Africa has a desirable mix of free trade and trade protection or not?

12. ## Exponential Modeling

A can of soda in 1972 costs \$0.10, by 2012 it cost \$1.25. Find the rate at which the cost of a can of soda increases over this time period.

13. ## Exponential Modeling

Atmospheric pressure decreases by about 12% for every kilometer you climb. The pressure at sea level is about 1013 atmospheres. How many atmospheres of pressure will you feel at 8.848 km?

14. ## Algebra

A circle’s area is represented by A = π(x2 − 22x + 121). What expression represents the radius of the circle? A. x + 11 B. x − 11 C. x − 22 D. x + 22 I got B. please correct me if I am wrong/ Thank You sir

15. ## Math

Which triangle is not possible to construct? A a right isosceles triangle B an acute equilateral triangle C an obtuse scalene triangle D a right equilateral triangle This is the second time ive posted but the last thread got confusing

16. ## geography

what are the causes of poor service delivery

17. ## Chemistry

A solution contains 14% by mass of h2so4.find the number of moles of h2so4 in 155g of solution

18. ## Algebra 1

Which function best models the geometric sequence 2, 4, 8, 16, 32, … ? A. A(n) = 2n B. A(n) = 2^n C. A(n) = n^2 D. A(n) = n^2 + 1 I got B is that correct? Please correct me if I am wrong

19. ## math

Draw a number line to show 3/4 and 6/8 are equivalent.

20. ## Calculus

One ship is sailing south at a rate of 5 knots, and another is sailing east at a rate of 10 knots. At 2 P.M. the second ship was at the place occupied by the first ship one hour before. At what time does the distance between the ships not changing?

21. ## Exponential Modeling

You invest \$230 to start a sandwich stand and decide to charge \$4.25 per sandwich. How much money will you make if you sell 75 sandwiches?

22. ## English

1. He admitted cheating on the test. 2. He admitted that he had cheated on the test. 3. He admitted that he cheated on the test. (Does #1 mnean #2 or #3?) 4. I'll admit cheating on the test. 5. I'll admit that I cheat on the test. 6. I'll admit that I

23. ## Algebra

An investment grows according to the exponential equation y = 15,000 · 1.07x, where x is the number of years invested. Which of the following statements is true? A. The investment will continue to grow at a rate of 7% per year compounded quarterly. B. The

24. ## algebra tricky q

Clem Colfax had \$10 to buy groceries. He needed milk at 70 cents a carton, bread at 60 cents a loaf, breakfast cereal at 50 cents a box, and meat at \$1.50 a pound. He bought twice as many cartons of milk as loaves of bread, the number of boxes of cereal

25. ## Math

The function b(h) models the percent of a certain wildflower that blooms during months in which the average daily sunlight is h hours. Name the most appropriate domain for this function. A. Integers, h ≤ 24 B. Integers, 0 ≤ h ≤ 24 C. Real numbers, 0

26. ## English

Which of the following is an example of an emotional appeal? A. Many organizations have offered recommendations. B. It will have global impact in the near future. C. It will be the greatest environmental tragedy. D. More than 90 percent of the scientists

27. ## Exponential Modeling

A certain vehicle loses 35% of its value each year. Compute the value of the vehicle at the end of the 3rd year if the car has an initial value of \$25,000

28. ## Exponential Modeling

A species of beetles grows 32% every year. Suppose 100 beetles are released into a field. How many beetles will there be in 10 years?

29. ## health and PE

The brain and spinal cord make up the reflex pathway. peripheral nervous system. central nervous system. the fight-or-flight response is it b?

30. ## math

a student takes up a True or false exam of 10 questions. he is completely unprepared and so he starts guessing randomly. he may toss a coin and use the outcome to determine the guess. compute the probability that he guesses correctly atleast five times.

31. ## accounting

Below is budgeted production and sales information for Flushing Company for the month of December: Product XXX Product ZZZ Estimated beginning inventory 32,000 units 20,000 units Desired ending inventory 34,000 units 17,000 units Region I, anticipated

32. ## Calculus

A cardioid r=1+cos(theta) A circle r=3*cos(theta) a) Define the domain of the region enclosed inside both the cardioid and the circle. b) Use polar coordinates to calculate the area. (We can use symmetry about x-axis)

33. ## History

why was the conversion experience artifact made?

34. ## chemistry

HF hydrolyzes according to the following equation: HF(aq)+H2O(l) H3O+(aq)+F-(aq) When 0.0300 mol of HF dissolves in 1.0 L of water, the solution quickly ionizes to reach equilibrium. At equilibrium, the remaining [HF]=0.0270 M. a.) How many moles of HF

35. ## math trick question

Trick question? Suppose m

36. ## chemistry

14. 100 g of water, H2O, is heated from 25C to 50C. What is the entropy change for the process? Cp = 4.2J/K·mol for water?

37. ## chemistry

Calculate no: of moles of cl2 produced at equilibrium when 1 mole of pcl5 is heated in 10 DM vessel kc 0.041

38. ## Bio

Does diffusion and osmosis move from high to low concentration?

39. ## language arts

Write a brief essay discussing the use of imagery in both "Grandma Ling" and "your little voice." Examine the ways in which each poem uses images to convey the emotions or attitudes of its speaker. I figured out the your little voice one i need help with

40. ## Chemistry

What are the number of molecules in 16g of h2co3??

41. ## Math

Mrs.thomas bought a new blanket shaped like an equilateral triangle that measures 3 feet on each edge.how long should the ribbon be?

42. ## Physics

A 1.8 kg piece of a metal initially at a temperature of 180oC is dropped into the water with mass of 14 kg. The water is in a container made of the same metal with mass 3.6 kg. The initial temperature of the water and container is 16.0oC, and the final

43. ## life orientation

critically discuss six way that the humans rights violation influence groups and the broader south africa

44. ## Bio

How is information for a specific protein carried on the DNA molecule? A. As a sequence of nucleotides B. In the double helix shape of the condensed chromosome C.In the ratio of adenines to thymines D.As a pattern of phosphates and sugars A C D are all

45. ## Calculus

Air expands adiabatically in accordance with the law PV^1.4=Const. If at a given time the volume is 14 cubic feet and the pressure is 40 pounds per square inch, at what rate is the pressure changing when the volume is decreasing 1 cubic foot per second?

46. ## political science

Which of the following is NOT a component of judicial review? The supremacy of local laws when they conflict with national laws or treaties. The power of the courts to declare national laws invalid if they violate the Constitution The supremacy of national

47. ## chemistry

What is the concentration of IO3- (total volume: 20mL) when you have .00001mol of HSO3- (total volume: 10mL)? Use the balanced equation IO3-(aq)+3HSO3-(aq)>>>I-(aq)+3SO4^2-(aq)+3H+(aq)

48. ## Algebra 1

Make an equation to represent the area of a square whose sides are given by the expression x + y. A. A = 2x + 2y + 2xy B. A = x2 + 2xy +y2 C. A = 2(x2 + y2) D. A = x2 + y2 I got D please correct me if wrong. Thx!

49. ## MEASUREMENTS

jOSE HAS A 15-M^2 GARDEN AND PLANS TO BUY SOME MULCH TO COVER HIS GARDEN. ON THE BAG OF MULCH IT SAYS ONE BAG OF MULCH WILL COVER 20FT^2. iF EACH BAG COST \$2.00 . hOW MUCH WILL IT COST TO MULCH THE GARDEN? 20FT^2*1YD^2/9FT^2*\$2.00/1YD^2

50. ## Math

24. A radio signal travels at 3.00 x 10^8 meters per second. How many seconds will it take for a radio signal to travel from a satellite to the surface of Earth if the satellite is orbiting at a height of 3.54 x 10^7 meters?

51. ## MATH

Which triangle is not possible to construct? A a right isosceles triangle B an acute equilateral triangle C an obtuse scalene triangle D a right equilateral triangle Would it be A

52. ## math-middle school

Kendra says that she can draw ,A and

53. ## math

Given one side of a golden rectangle is 3.7 inches, find the possible lengths of the other side. Notice that the other side can be either longer or shorter than 3.7 inches. Round your answers to the nearest tenth and use Greek Phi symbol=1.618.

54. ## Trigo

A point on the ceiling of a room is 12ft. from each of the vertices of a triangle on the floor whose legs are 6ft. A and 8ft. respectively. find the length of the ceiling

55. ## life prentation

list and discuss any four factor that could threaten or limit the core functions of the media

56. ## english

i need a help to write a speech about traditional african marriage is an advantage for men only not women

57. ## Math

Compound Interest A Interest paid on the principal and the interest of a deposit or loan. B Percentage of discount on a purchase C The amount on income taxes paid by a business D Interest paid only on the principal of a deposit or loan Is it d?

58. ## chemistry

Hi, I posted this question earlier.. 100 g of water, H2O, is heated from 25C to 50C. What is the entropy change for the process? Cp = 4.2J/K·mol for water? I was told 100*4.2ln(323 K/ 298k) was the way to calculate it, it does not produce the correct

59. ## Math

angle theta is in standard position on a co-ordinate grid. the terminal arm of theta is in quadrent 2 on the line that's equation is 3x-4y=0. Determine the sine of this angle and then the measure of angle theta.

60. ## Plane trigonometry

Hi, could you help me solve the one cycle graph and the 5 points of this equation: Y=2sin pi(x+1/2)+1 thank you in advance!

61. ## Math

A florist used 12 flowers to make a bouquet, including 4 daisies. What is the probability that a randomly selected flower will be a daisy?

62. ## French

I need some french grammatical questions that I can ask and then answer. I don't have any questions on grammar.

63. ## math

in a series of 5 one day cricket matches between A and B, the probability of B winning or making draw are 1/3 & 1/6 respectively. If a win, loss or draw gives 2,0 or 1 points respectively, find the probability that B will score 5 points in the series.

64. ## Chemistry

A current of 10 amps passes for an hour through a solution of sodium chloride with a volume of 1L by poles of pt,calculate the pH of the solution after the electrolysis is finished.

65. ## chem

If a solution initially contains (9.5x10^-2) M of HC2H3O2, (and no H3O+ or C2H3O2– ),what is the equilibrium concentration of H3O+ (aq) in the mixture?

66. ## Math

45% liked literature, 70% liked music and 15% liked none.if 60 students liked both subjects. Find the number of students participated in this survey.

67. ## Math

Gunny has a sheet of plywood that is 4 feet by 8 feet she wants to saw the plywood into pieces 1 foot high and 2 feet long for signs How many signs can she make with the sheet of plywood?

68. ## math

Give me steps to find log of32 in log table

69. ## Solid Mensuration

The diagram is formed from 6 identical closed-packed circles. If the height of the figure is 2 feet, find the radius of each circle in inches. Show your complete solution with formula.

70. ## Life orientation

Assess the extent to which bad road use has a direct impact on the physical,emotional,social and economic aspects to the family,the community and the country

71. ## Geometry

A ladder resting against a wall forms an angle of 60 degree with the level ground. If the foot of the ladder is moved out from the wall 8ft. the ago forms with the ground is 45 degree. Find the length of the ladder.

72. ## Chemistry- polarity

Is 2,4-Hexadiyne-1,6-diol a polar or non-polar compound? I think it is non-polar, based on the the high retention factor (0.89) I got from the TLC.

73. ## language arts

What does Annie's dialogue in the passage reveal about her character? a.she is proud and indifferent b.she is sarcastic and cynical c.she is timid and nervous d.she is confident and persistent from the miracle worker by William Gibson act 3 please help

74. ## Math NEED HELP!!!!!!

Explain how to construct a perpendicular bisector.

75. ## Chemistry

If i have 0.5 mole of hydrogen peroxide how many moles of oxygen would be produced assuming all of the hydrogen peroxide decomposes?

76. ## physics

A rifle of mass 3.0 kg fires a 15 gram bullet with a muzzle speed of 1.5 km/s. The initial speed of the rifle’s recoil would be ?

77. ## Physics

If an electron has a total energy of 5.6 MeV, how would I find the kinetic energy and momentum??

78. ## PED

shooting basketball jump shots from different sports around the key is an example of which type of practice?

79. ## Math

The sum of the first three terms is 24 and the sum of the next three terms is 51. Find the first term and the common difference

80. ## English

"High Court" is "Supreme Court in the USA, right? In the UK, it is different?

81. ## math

A draws a card from a pack of n cards marked 1,2,3,...,n. The card is replaced in the pack and B draws a card. Find the probability that A draws I)the same card as B. Ii)higher card than B.

82. ## math

three digit numbers are to be formed from digits 0,1,2,3...9 if repetitionis allowed. (a) how many of such numbers can be formed? (b)how manyof the numbers in(a)are divisible by 3 and how many of 9? (c) find the sum of all the numbers divisible by 3 but

83. ## Math

Calvin and Brain drive at a speed of 70 km/h and 80 km/h respectively. Calvin sets off from City A. Brain sets off from City B. The distance between the City A and City B is 300 km. If they set off at the same time towards each others, when will they meet?

84. ## Chemistry

Describe the procedure you would follow to determine the concentration of Vitamin C in a sample if the volume of DCPIP required to reach the endpoint was more than the 25-mL flask could hold. Note the titration must still be carried out in the flask. Be

85. ## science

Calculate how many grams of NaOH must be added to 75.0 ml of H2SO4 1,000m to get a tampon that has pH = 1,920

86. ## Algebra

What is the answer when you see this? "x + x + 2x" Does it become 2x^3?

87. ## science

Calculate the pH of a solution of ammonium acetate (CH3COONH4) 0,85M knowing that for NH3 Kb = 1,79x10-5 and CH3COOH Ka = 1,76x10-5 and commented on the result obtained. Then calculate the percentage of acetic acid product at equilibrium

88. ## riddle

Am always here but I stay in another house

89. ## Trig

Problem: A cable from the top of a 60 foot high tower is to be attached to the ground (x) feet from the base of the tower. A) if the cable makes an angle of t radians with the ground when attached, express t as a function of x. B) if t = pi/5, how far is

90. ## Math

Given u = 1/SQRT(10) (-2,1,-1,2). Find a unit vector v satisfying the condition that u . v = -1.

91. ## Algebra 1

An investment grows according to the exponential equation y = 15,000 · 1.07x, where x is the number of years invested. Which of the following statements is true? A. The investment will continue to grow at a rate of 7% per year compounded quarterly. B. The

92. ## Precalculus(Please check and help)

Find the Equation. Please check the answers and help. Thanks! 1.) Ellipse with center (0,0), foci on x-axis; x intercepts; major axis of length 12, minor acis of length 8. I got : x^2/144 + y^2/64 = 1 2.) A parabola with vertex (0, 0) and focus (5, 0). I

93. ## Math

What is 5/6 of 1/2

94. ## LA

2. Read the passage. What technique is the author using to develop point of view? "Though zoos are meant to be a joy to viewers and teach lessons about our earth, the zoo jails its inhabitants and passes on faulty knowledge." a. state a claim b. persuasive

95. ## chemistry

Which conducts better, BeCl MgCl2

96. ## Biology

8. Presenting with symptoms of recurrent infections, weakness, and frequency of urination over a 6 month period, a 34-year-old man is found to have a blood glucose level of 142 mg/dl and an elevated hemoglobin A1c level. His most likely diagnosis is: A.

97. ## English

Literary Analysis: Author’s Voice Read the selection. Then, answer the questions that follow. I’ve come to terms with my dreaminess, my absent-mindedness—well, okay, my ditziness! Why do I characterize myself this way? A few examples might make this

98. ## English

Literary Analysis: Plot Read the selection. Then, answer the questions that follow. I smiled to myself as I remembered the game that made me a star ten years ago . . . The rain was pouring down as I stepped out onto the football field. It was the last game

99. ## language

What is the figurative language for it's hard to see the pain behind the mask?

100. ## English

Literary Analysis: Character and Characterization Read the selection. Then, answer the questions that follow. People who don’t know Harry tend to underestimate him. They cast a skeptical eye on his typical outfit: ragged jeans and shirts that bear

101. ## English

Literary Analysis: Character and Characterization Read the selection. Then, answer the questions that follow. People who don’t know Harry tend to underestimate him. They cast a skeptical eye on his typical outfit: ragged jeans and shirts that bear

102. ## English

Literary Analysis: Character and Characterization Read the selection. Then, answer the questions that follow. People who don’t know Harry tend to underestimate him. They cast a skeptical eye on his typical outfit: ragged jeans and shirts that bear

103. ## Algebra

Maximize the following objective function using simplex method: Z=10 X_(1 )+8 X_2 Subject To: 3 X_1+1X_2 ≤4500 2 X_1+2X_2 ≤4000 X_1+3X_2 ≤4500 With X_1 ≥0 X_2 ≥0

104. ## MAKGOKA LO

WHO THE ROLE PLAYERS ARE WHO GOT INVOLVED, THE EXTENT TO WHICH IT LINKED TO OTHER CRIMES , ROLE PLAYED BYTHE MEDIA ANDTHAT THE STATE TO DEAL WITH THIS CRIMEAND WHO THE FRAUD AND CORRUPTION AFFECTED THE OFFENDERS CAREER IN SOUTH AFRICA

105. ## Bio

The differences between two molecules include the type of sugar that forms a section of the molecules and the identity of one of the four nitrogenous bases that make up another section of the molecules. These two molecules are A. proteins B. lipids C

106. ## Chemistry

How many mL of a 0.5M Ca(OH)2 solution are needed to neutralize 38 mL of a 2M HNO3 solution? ANSWER IS: x = multiply / = divide 38mL HNO3 X 1 L HNO3 x 2M HNO3 x 1 L Ca(OH)2 x 2M Ca(OH)2 x 1000 mL / 1000 mL/1L HNO3/..5mL Ca(OH)2/1M HNO3/1L = 304 mL Ca(OH)2

107. ## Physics

A ball of mass m1=3kg moving south at 6m/s collides with a ball of mass m2=2kg initially at rest. The incoming ball is deflected in the direction 60 degrees S of W and the target ball moves off at 25 degrees E of S. Consider that the Collison happens on a

108. ## Physics

When a charged particle moves at an angle of 17.0o with respect to a magnetic field, it experiences a magnetic force of magnitude F. At what angle (less than 90o) with respect to this field will this particle, moving at the same speed, experience a

109. ## calculus

Given the area is in the first quadrant bounded by y²=x, the line x=4 and the 0X What is the volume generated when this area is revolved about the 0X? the answer is 25.13 but I don't know how. help me please

110. ## Art

Which of the following best explains why a colorful tulip is not typically viewed as a work of art? Tulips cannot be displayed in a gallery. Tulips are not human made. (MY ANSWER) Tulips do not have artistic patterns.

111. ## Math

Is this answer correct? 55% of x = 2 The answer I got was 40/11.

112. ## Physics

A 100 kg block is hanging from a frictionless pulley with another block of unknown mass on the other side of the pulley. It is released from a height of 1 meter above the ground. It then takes 0.9 seconds to reach the ground. What is the weight of the

113. ## TEMPERATURES

In April, the average high temperatures in Khatmandu is 24 degrees Celsius. In April, the average high temperatures in Lihueis 79 degrees. Which city tends to be warmer in April and how much warmer. C= 5/9(F-32); C=5/9(24-32)-4.44 F=9/5 79=32

114. ## Art

They collected works that were culturally popular. They collected works that depicted revolutions. They collected works that depicted the history of cities. They collected works that supported new, unusual artists.(MY ANSWER) What did Henry Walter's

115. ## English

1. He admitted cheating on the test. 2. He admitted that he cheated on the test. 3. He admitted that he had cheated on the test. cf. He admitted having cheated on the test. (Does #1 mean #2 or #3?) 4. He admits cheating on the test. 5. He admits that he

116. ## political science

On the spectrum of international ideologies, what group is most likely to oppose other nations monitoring human rights conditions in the U.S., and favor national tariffs, import quotes, and government subsidies to national businesses? International

117. ## life orientation

Explain in paragraph what is human rights violation or discrimination

118. ## English

1. I thought of other names but I was not satisfied with any of them. 2. I thought of other names but I was satisfied with none of them. (Are both the same?) 4. I always watched him "working" when I was young. (Did "I" watched him working for some time?)

119. ## anatomy and phys

ATP provides an essential energy source in the CNS for A) division of neurons B) maintenance of ionic gradients via ATPase C) generation of action potentials D) ESPSs and IPSPs

120. ## English

"Admit" is a gerund taker and the gerund can connote the action happened prior to "admit". So "she admitted making a mistake". ========================= 1. She admitted making a mistake. 2. She admitted cheating on the test. (Did the action "making a

121. ## diameter

The famous rotunda of the Capital Bldg has a floor that is 96 feet in diameter. A marble restoration company charges \$40 per sq. yard for its services. How much would it cost to restore the entire floor in the rotunda? My answer 96 feet in diameter C=πd

122. ## MEASUREMENTS

162 3/4 ACRES =_______MI^2 1642.75 ACRES/1 * 1 MILE/640 ACRES =1642.75/640=2.57 MILES

124. ## Exponential Modeling

The landscaper pours 200 gallons of herbicide in a pond. The herbicide degrades 10% each week. How much will be in the pond after 1 week?

125. ## CONVERSIONS

18 1/2 YD^2 =________FT^2

126. ## Life orientation

The 3 human rights violation and explain in a introductory paragraph why you choose the specific human rights violation

127. ## chemistry

How to find the moles of IO3- reacted when you have .00001mol of 10mL HSO3-? Using the equation IO3-(aq)+3HSO3-(aq)>>>I-(aq)+3SO4^2-(aq)+3H-(aq)

128. ## Life orientation

Evaluate the physical,social and economic consequences of this crime to the offender

129. ## Trigonometry

prove the ff: a.) sin(x/2) - cos(x/2) = +-sqrt(1 - sin(x)) b.) tan(x/2) + cot(x/2) = 2csc(x)

130. ## TRIGO

prove the ff: a.) sin(x/2) - cos(x/2) = +-sqrt(1 - sin(x)) b.) tan(x/2) + cot(x/2) = 2csc(x) HELP PLEASE!!

131. ## Language Arts

In the multi-drafting process, what does a reader look for in the second reading of a drama? A)How each scene moves the story forward B)When and where the action takes place(I PICK THIS) C)The theme of the drama D)The internal and external conflicts

132. ## geography

what are the results/effects of poor service delivery socially,environmental and economic problems?

133. ## Math

Potatoes are sold in 2.25 pound bag. how many whole bag must tanisha buy in order to have enough potatoes?

134. ## math

It the track is 1/4 mile around and you do 3 laps in 4 and 1/2 min, how many mile per hour do you run?

135. ## Math

A circle’s area is represented by A = π(x2 − 22x + 121). What expression represents the radius of the circle? A. x + 11 B. x − 11 C. x − 22 D. x + 22 I got d please correct if wrong thx.

136. ## Math

I need help please. 89°F= ___C

137. ## Chemistry

In a laboratory, the following reaction is performed by combining 358 g of H2O and a sufficient amount of CaC2. The percent yield for this reaction is 94.5%. Calculate the actual yield of acetylene (C2H2) in grams from this reaction. CaC2 + 2H2O C2H2 +

138. ## Chemistry

Suppose the osmotic pressure of blood at 37 °C is 7.65 atm and you are preparing an intravenous (IV) NaCl solution for a patient. What concentration (in M) of NaCl solution should you prepare so the resulting IV solution is isotonic with blood, if the

139. ## math

six girls are to enter a dance with ten boys so that every girl is between two boys. what is the probability that some specified boy remains between two boys?

140. ## Physics

An engine works between the two temperatures 200 C and 120 C. Calculate its efficiency in percentage?

141. ## Physics

A 100 kg block is hanging from a frictionless pulley with another block of unknown mass on the other side of the pulley. It is released from a height of 1 meter above the ground. It then takes 0.9 seconds to reach the ground. What is the weight of the

142. ## Chemistry

Describe the procedure you would follow to determine the concentration of Vitamin C in a sample if the volume of DCPIP required to reach the endpoint was more than the 25-mL flask could hold. Note the titration must still be carried out in the flask. Be

143. ## math

how much sugar am i using if i use 3 tablespoons and want it in teaspoons? 1/2 teaspoons = 0.16 tablespoons

144. ## mathematics-change of subject of the formula

A=πr√(h^2-r^2) make "r" the subject of the formula show workings #thanks

145. ## Physixs

In my homework example, it says that there are 234 nucleons (140+94) bound in the products of this reaction: n-1 + U-235 ---> Ba-141 + Kr-92 + 3n-1 Where are they getting that number??? I though you added up the protons and neutrons to find how many

146. ## chemistry

the air in a 4.00L tank has pressure of 1.70atm what is the pressure in atmospheres 1L

147. ## algebra

Graph the direct variation y=−1.5x. Using the graph, find: Reference b The value of x when y=−3; 4.5; 6

148. ## MEASUREMENTS

Dan wants to pour a concrete patio in his backyard. He measures the length, width, and thickness of the patio and finds that the amount of concrete he needs is 200ft^2. When he called the concrete company they asked him how many cubic yards of concrete

149. ## History

The United States cut off sales of oil to Japan after the ? A. Japanese attack on Dutch Indonesia. B. Japanese attack on Pearl Harbor. C. Japanese occupation of southern Indochina. D. Japanese occupation of Hong Kong. I think it is C. Am I right please

150. ## Math

1 Constant of Proportionality A a number that has more than two factos B The distance between the numbers on a scale of a graph C polygon that has four sides D equation to represent a proportional relationship Im pretty sure its D right?

151. ## Geometry ( helllppp pleaaassse )

A point on the ceiling of a room is 12ft. from each of the vertices of a triangle on the floor whose legs are 6ft. A and 8ft. respectively. find the length of the ceiling. 2. With a 12ft. pole marked in feet, how can one determine the foot of the

152. ## trig

tan(theta)/tan(2theta)-tan(theta)= cos(2theta)

153. ## Math

1 dandelion = 4 wildflowers 3 ferns = 8 wildflowers How many dandelions equal 12 ferns?

154. ## MATH- HELP PLEASE. IM LOST

Given one side of a golden rectangle is 3.7 inches, find the possible lengths of the other side. Notice that the other side can be either longer or shorter than 3.7 inches. Round your answers to the nearest tenth and useGreek Phi normal.svg=1.618.

155. ## trig2

given real numbers x, a, b with x>= a>= b>= 0, show that sqrt x+b - sqrt x-a >= sqrt x+a - sqrt x-b

156. ## trig3

color each point in the coordinate plane either red or blue. prove that no matter how the coloring is done there must exist two points of distance one that are the same color.