# Questions Asked onSeptember 9, 2012

1. ## math

mr. Rodriguez, a college instructor, can grade his class papers in 3 hours while it takes his assistant 4 1/2 hours. If Mr. Rodriguez graded the papers for 1 hour and then left the job for his assistant to complete, how long will it take his assistant to

2. ## Trigonometry

Points A and B 1000 meter apart are plotted on a straight highway running east and west. from A, the bearing of tower C is N32*W and from be, the bearing of C is N64*E. approximate the shortest distance of the tower from the highway. please explain........

3. ## chemistry buffers

What molar ratio of HPO4 2- to H2PO4 - in solution would produce a pH of 7.0? Phosphoric acid (H3PO4), a triprotonic acid, has pKa values: 2.14, 6.86, and 12.4. Only one of the pKa values is relevant here. how do i know which pka value to use.. please

4. ## physical science

What is the kinetic energy of a 29 kg dog that is running at a speed of 8.8 m/s (about 20 mi/h)?

5. ## Algebra

If m angle BGC =16x-4 and m angle CGD = 2x+13,Find the value of x so that angle BGD is a right angle.

6. ## physical science

How much work does gravity do on a 0.140-kg ball falling from a height of 14.0 m? (neglect air resistance)

7. ## physic

You are driving into St. Louis, Missouri, and in the distance you see the famous Gateway-to-the-West arch. This monument rises to a height of 192 m. You estimate your line of sight with the top of the arch to be 7.37 ° above the horizontal. Approximately

8. ## science

Your neighbor has fertilized her lawn. Several weeks later, she is alarmed to see that the surface of her ornamental pond, which sits at the bottom of the sloping lawn, is covered with a green layer of algae. (a) Suggest a feasible explanation for the

9. ## Math

A scuba diver located 20 feet below the surface of water spots a shipwreck at a 70 degree angle of depression. After descending to a point 45 feet above the ocean floor, the diver sees the shipwreck at a 57 degree angle. Draw a diagram to represent the

10. ## Economics

1. An economy's production possibilities frontier is also its consumption possibilities frontier. a. under all circumstances b. under no circumstances c. when the economy is self-sufficient d. when the rate of tradeoff between the two goods being produced

11. ## Algebra

If m angle FGE =5x+10, Find the value of x so that line FC is perpendicular to Line AE. Line AE is a striaght line

12. ## Trigonometry

A plane is headed due east with airspeed of 240 mph. if a wind at 40 mph is bloiwing from the north , find the ground speed of the plane.

13. ## physics

A basketball player is standing on the floor 10.0 m from the basket as in the figure below. The height of the basket is H = 3.05 m, and he shoots the ball at an angle, θ = 37.6°, with the horizontal from a height of h = 2.20 m. (a) What is the

14. ## geography

what factors account for the similarities and differences between the subdivisions in tropical climate zones?

15. ## Finance

Use the following financial statements for Lake of Egypt Marina, Inc. LAKE OF EGYPT MARINA, INC Balance Sheet as of December 31, 2012 and 2011 (in millions of dollars) 2012 2011 2012 2011 Assets Liabilities and Equity Current assets: Current liabilities:

16. ## Calculus

An open top box is made by cutting congruent squares from the corners of a 12 inch by 9 inch sheet of cardboard and then folding the sides up to create the box. What are the dimensions of the box which contains the largest volume?

17. ## Math

A 3m wide path runs along the inside of a sq. Park of side 125m.find d cost of constructing it at Rs 4.50per square meter. Gve me soltn and ans. Is Rs 6588

18. ## math

Can you each make up an example in which "Some A are not B" is true, but the statement "Some B are not A" is false? An example would be "Some dogs are not poodles" is true but "Some poodles are not dogs" is false

19. ## math

The equation for: Judy and Linda agree to share the cost of a \$21 pizza based on how much each one ate. If Judy ate 3/4 of the amount that Linda ate, how much should each pay? what is the formula please.

20. ## Ana

A group of hikers on a mountain began at an elevation of 3040 feet above sea level and stopped at elevation of 2319 feet above sea level. What was their change in elevation between these points? How can you tell from the change in elevation whether the

21. ## science

If a strong west wind is blowing at 35 milers per hour, how fast is the wind moving: in kilometers per second? in meters per second?

22. ## chemistry

Make up a 500mL solution of 4.8M solution HCl (HCl gmw= 36.5g)

23. ## Math

Kerri's father bill was a baker. Out of his usual morning batch of cookies bill burned the first 2 dozen cookies. He gave half of what was left to Keri to take to scol. He wrapped up half of the remaining cookies and have them to a group of fireman. He

24. ## physical science

A 136-lb. student races up stairs with a vertical height of 4.8 m in 6.0 s to get to a class on the second floor. How much power in watts does the student expend in doing work against gravity?

25. ## physics

Part 1 A motorist traveling at 17 m/s encounters a deer in the road 48 m ahead. If the maximum acceleration the vehicle’s brakes are capable of is −5 m/s^2, what is the maximum reaction time of the motorist that will allow her or him to avoid hitting

26. ## Physics

Margaret walks to the store using the following path: 0.440 miles west, 0.245 miles north, 0.300 miles east. What is her total displacement? That is, what is the length and direction of the vector that points from her house directly to the store?

27. ## physics

Some hydrogen gas is enclosed within a chamber being held at 200 whose volume is 0.0250 . Initially, the pressure in the gas is (14.8 ). The chamber is removed from the heat source and allowed to cool until the pressure in the gas falls to . At what

28. ## College Algebra

The period (the time required for one complete swing) of a simple pendulum varies directly as the square root of its length. If a pendulum 12 feet long has a period of 4 seconds, find the period of a pendulum 3 feet long.

29. ## algebra

Jeremy is building a deck for the community center. The deck is shaped as rectangle. The width of the deck is 29ft. The perimeter of the deck is to be at least 134ft. Write an inequality that represents all possible values of the length of the deck. Find

In what ways do different ideologies and political systems influence the environment in which MNCs operate?

31. ## CHEMISTRY

Assume an organic compound has a partition coefficient between water and diethyl ether equal to 7.33. If there are initially 9.81 grams of the compound dissolved in 100.0 mL of water, how many grams will remain in the aqueous layer after extraction with

32. ## physics

The highest barrier that a projectile can clear is 11.5 m, when the projectile is launched at an angle of 15.4° above the horizontal. What is the projectile's launch speed?

33. ## geometry

ye has 44 feet of fencing to enclose a rectangular garden. She wants to to enclose as much area as possible. use trial and error to find maximur are faye can enclose with all 44 feet of fence. name the lencth and width that gives maximum area.

34. ## Physical science

A man pushes a lawn mower on a level lawn with a force of 192 N. If 50% of this force is directed downward, how much work is done by the man pushing the mower 7.3 m?

35. ## Geometry

An angle is 15 less than four times its supplement. Find both angle measures.

36. ## Physics

Jerry bicycles from his dorm to the local fitness center: 3.06 miles east and 2.07 miles north. Cindy's apartment is located 1.5 miles west of Jerry's dorm. If Cindy is able to meet Jerry at the fitness center by bicycling in a straight line, what is the

37. ## math/science

If a bee flies 6km/h how long will it take to reach a flower that is 1.2 km from the hive?

38. ## chem(molarity)

a buffer contains 0.010 mol of lactic acid and 0.050 mol of sodium lactate per liter . How do I find the molarity of the acid and base?

39. ## Hypothesis Statistics

At one school, the average amount of time that tenth-graders spend watching television each week is 18.4 hours. The principal introduces a campaign to encourage the students to watch less television. One year later, the principal wants to perform a

40. ## Physics

A car traveling at a constant speed of 39.6 m/s passes a trooper hidden behind a billboard. One second later the trooper starts the car with a constant acceleration of 2.25 m/s^2 . How long after the trooper starts the chase does he overtake the speeding

41. ## physics

During extreme hypothermia, a young women's temperature dropped to 20.6 degrees C. What was her temperature on the Fahrenheit scale?

42. ## maths

a cook goes into the store room & take out 1/6 of rice from a 72 kg sack.if he uses 2/3 kg of this rice each day,how many days will the rice he took out last?

43. ## Trigonometry

Three ships are situated as follows: A is 225 miles west of C while B, due south of C, bears S25*10'E from A. a. How far is B from A? b. How far is B from C? c. what is the bearing of A from B? PLEASE EXPLAIN

44. ## Math

A square field of side 25m and a rectangular field of length 28m have the same perimeter. Which field has a larger area? Gve me ful soltn plz

45. ## Precalculus

an air traffic controller spots two planes at the same altitude flying towards one another. their flight paths form a right angle at point p. One plane is 150 miles from point p and is moving 450mph. the other plane is moving at 450mph but is 200 miles

46. ## college physics

A race driver has made a pit stop to refuel. After refueling, he leaves the pit area with an acceleration whose magnitude is 5.40 m/s2; after 4.0 s he enters the main speedway. At the same instant, another car on the speedway and traveling at a constant

47. ## Chemistry

List 6 factors that might influence the solubility of a solute in a given solvent. Describe how these factors might influence solubility.

48. ## Chemistry

Which hydrocarbon is least likely to dissolve in water - hexane, butane, decane?

49. ## physics

A hot-air balloon is rising upward with a constant speed of 3.06 m/s. When the balloon is 9.31 m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much time elapses before the compass hits the ground?

50. ## physics

Compute your average velocity in the following two cases: (a) You walk 73.6 m at a speed of 1.79 m/s and then run 73.6 m at a speed of 4.31 m/s along a straight track. (b) You walk for 1.00 min at a speed of 1.79 m/s and then run for 1.30 min at 4.31 m/s

51. ## chem

Annual production of sulfuric acid in the United States last year was 400. million tons. If the density of sulfuric acid is 1.37 g/mL, find the total volume in m^3 produced in the U.S. last year.

52. ## Hypothesis Statistics

A two-tailed test is conducted at the 5% significance level. What is the P-value required to reject the null hypothesis?

53. ## Health and Nutrition

Define carbohydrates, chemical make up and basic functions of sugars and starches in the body.

54. ## math

each question on a five-question multiple-choice quiz has answer choices labeled a, b, c and d. how many different ways can a student answer the five questions

55. ## chemisrty

calculate the delta H when 0.150 mmol of AgCl dissolves in water?

56. ## chemistry

Assuming the density of a 5% acetic acid solution is 1g/ml, determine the volume of the acetic acid solution necessary to neutralize 25ml of 0.1m naoh also record this calculation on your report My calculation 1g/ml x 1000ml x 0.05/61 = 0.81M 0.81m = 25ml

57. ## SCIENCE

Unit of measure for the international system of measurement-what unit is used for temperature, mass, volume, and length? please answer :) I NEED TO STUDY AND HAVE A QUIZ TOMORROW

58. ## Math

The length and bredth of a rectangular field are in d ratio 5:3.If the cost of reaping the field at 85paise per sq. Meter is Rs.624.75,find the cost of fencing it at the rate of Rs. 4per meter. Plz give me full solutn nd ans is Rs.448

59. ## math-algebra

Factor the polynomial 64x^3-27

60. ## Fluid Mechanics

A circular disc having a diameter of 125cm is immersed in water so that the distance of its perimeter measured vertically below the water surface varies between 60cm and 150cm. Find the total force due to the water acting on one side of the lamina, and the

61. ## math

how many different outfits can be made if jessica chooses 1 each from 11 skirts, 9blouses, 3 belts, and 7 pairs of shoes

62. ## Geometry

How do I factor 2x^2-16x-66

63. ## calculus HELP

Find the values of a and b that make f continuous everywhere. f(x) = (x2 − 4)/(x − 2) if x < 2 ax2 − bx + 3 if 2 ≤ x < 3 4x − a + b if x ≥ 3 solve for a and b? HELP ive tried everything

64. ## English

Please help me understand these questions so that I can do the rest, thanks! 1)The following infinitive and past participle verb forms found in Dutch. Root Infinitive past participle" Wandel wandelen, gewandeld, "walk" 2)Consider the following nouns in

65. ## Calculus

A snowball has a radius of 3 inches. Assume the rate with which the volume of the snowball melts is proportional to its surface area. If, after 1 hour, the radius of the snowball is 2.9 inches, predict what the radius will be after one day. using

66. ## Stats

A two-tailed test is conducted at the 5% significance level. What is the right tail percentile required to reject the null hypothesis?

67. ## Math

an air traffic controller spots two planes at the same altitude flying towards one another. their flight paths form a right angle at point p. One plane is 150 miles from point p and is moving 450mph. the other plane is moving at 450mph but is 200 miles

68. ## physics

A lighthouse that rises 46.0 ft above the surface of the water sits on a rocky cliff that extends 19 ft out into the ocean from the base of the lighthouse. A sailor on the forward deck of a ship sights the top of the lighthouse at an angle of 25.0 degrees

69. ## pre calc

f(x)=-3x+2 a) express the slope of the secant line of each function in terms of x and h. b) find msecant for h=.5, .1, and.01 at x=1. c) find the equation for the secant line at x=1 with h=1.01 I got -3 for a but don't know how to do the others becaus a

70. ## chemistry

a magnesium (Mg) atom with a mass number of 25 contains ?

71. ## Math

a man cashed a check for \$63. the bank teller gave him six bills, but no one- dollar bills and no change. what did she give him?

72. ## Fluid Mechanics

A circular disc having a diameter of 125cm is immersed in water so that the distance of its perimeter measured vertically below the water surface varies between 60cm and 150cm. Find the total force due to the water acting on one side of the lamina, and the

73. ## NEED HELP!! ALGEBRA

A motorboat can maintain a constant speed of 26 miles per hour relative to the water. The boat makes a trip upstream to a certain point in 35 minutes; the return trip takes 17 minutes. What is the speed of the river current?

74. ## Chemistry

Help with any of these: 21. Aluminium sulphate is often used by gardeners to acidify soil and can be produced by the reaction 2Al(OH)3(aq) + 3 H2SO4(aq) à Al2(SO4)3(aq) + 6 H2O(l) The volume of 0.275 mol/L H2SO4(aq) needed to react completely with 112 mL

75. ## physics

A rock is dropped from a sea cliff and the sound of it striking the ocean is heard 4.1s later. If the speed of sound is B40 m/s, how high is the cliff? ____m

76. ## Math

Adjacent sides of parellogram are 36cm and 27cm in length. If the perpendicular distance btn. the shorter sides in 12cm,what is the distance btn. The longer sides? Gve me ful solutn

77. ## Health and Nutrition

what is the difference between simple and complex carbohydrates?

78. ## Precalculas

The sum of the first 30 terms of one arithmetic sequence is 300 more than the sum of the first 30 terms of another arithmetic sequence. what could the sequences be?

79. ## science

Analysis of forelimb anatomy of humans, bats, and whales shows that humans and bats have fairly similar skeletal structures, while whales have diverged considerably in the shapes and proportions of their bones. However, analysis of several genes in these

80. ## Math

an air traffic controller spots two planes at the same altitude flying towards one another. their flight paths form a right angle at point p. One plane is 150 miles from point p and is moving 450mph. the other plane is moving at 450mph but is 200 miles

81. ## sociology

how does the sociological imagination help people to understand the effects of society on their personal lives

82. ## physic

A partly-full paint can has 0.66 U.S. gallons of paint left in it. (a) What is the volume of the paint, in cubic meters? (b) If all the remaining paint is used to coat a wall evenly (wall area = 13 m2), how thick is the layer of wet paint? Give your answer

83. ## finance

Knight has a property tax base with an appraised value consisting of \$142,000,000 of taxable real property and \$78,000,000 of taxable personal property. The assessment ratio is 50%. Exemptions for the elderly reduce assessed value by \$3,000,000. The city

84. ## Scirnce/ math

If a pinecone was thrown from a height of 45 meters and hit the ground 4.5 seconds later, how fast was the pinecone traveling

85. ## Physics

Which of the following statements related to vectors is not correct? a) A "one way" road sign is an example of a vector. b)A vector is a physical description that includes both a number and a direction. c)If someone states, "Joe is traveling at 30 miles

86. ## physical

An automobile starts from rest and accelerates to a final velocity in two stages along a straight road. Each stage occupies the same amount of time. In stage 1, the magnitude of the car's acceleration is 3.19 m/s2. The magnitude of the car's velocity at

87. ## physics

The Space Shuttle travels at a speed of about 7.88E+3 m/s. The blink of an astronaut's eye lasts about 107 ms. How many football fields (length = 91.4 m) does the Shuttle cover in the blink of an eye?

88. ## Math

It took Markus half an hour to drive home from work.He averaged 34 miles per hour. How far does Markus live from work?

89. ## physics

During a hard sneeze, your eyes might shut for 0.43 s. If you are driving a car at 125 km/h, how far does it move during that time?

90. ## physics

A hare and a tortoise compete in a race over a course 4.90 km long. The tortoise crawls straight and steadily at its maximum speed of 0.440 m/s toward the finish line. The hare runs at its maximum speed of 14.00 m/s toward the goal for 0.800 km and then

91. ## Physics

A bug completes one lap along the edge of a circular planter of radius 22.4 cm in 16.45 s. How fast was it traveling? Answer in units of cm/s.

92. ## Math

A tile is in the shape of a parellogram of base 5cm and corresponding height equal to 3cm.Calculate the number of tiles required to cover an area of 45m^2.

93. ## Spanish check

Pedero es de Peru ¿de dónde eres soy tus amigos? Tu eres ser de Atlanta Mi profesora es de español ser Mexicano ser ustedes de Mexico ¿dónde sois vosotros ser de?

94. ## Physics 2A

A position vector has an x component of -2.5 m and a y component of 4.2. (a) What is the vector's magnitude and directions? b) suppose a spider took 10 minters to first walk -2.5m in the x direction and then 17 mintures 4.2 m in the y direction? Find the

95. ## Geometry

Use the figure below in which ec bisects ad at c. Find the value of x and the measure of the indicated segment.

96. ## physics

A duck flies south at a constant speed of 20 m/s. A man stands 30 meters below the duck, he fires a shot upward at an initial velocity of 30 m/s. Half a second later the duck instantly commences a constant acceleration forward of 16 meters/sec^2. How far

97. ## calculus

A snowball has a radius of 3 inches. Assume the rate with which the volume of the snowball melts is proportional to its surface area. If, after 1 hour, the radius of the snowball is 2.9 inches, predict what the radius will be after one day.

98. ## Spanish

Write a complete sentence in Spanish using the verb ser. 1.Andy García y Jimmy Smits / los Estados Unidos 2. Julia Álvarez / la República Dominicana 3. Enrique y Julio Iglesias / España

99. ## chemistry

the distance between new york and san francisco is 4741000m. Now that may sound impressive but to put all those digits on a car odometer is slightly inconvenient. in this case kilometers are a better choice for measuring distance. change the distance to

100. ## Spanish

How do you conjugate the verb ser in different sentences?

101. ## physics

The largest stone jar on the plain of jars in laos has a mass of 6.0 x 10^3 Kg. Express this mass in miligrams.

102. ## chemistry

How would a chemist make up 100g of 10% aqueous solution of HCl (using 12M HCl)

103. ## CHEMISTRY

Assume an organic compound has a partition coefficient between water and diethyl ether equal to 7.33. If there are initially 9.81 grams of the compound dissolved in 100.0 mL of water, how many grams will remain in the aqueous layer after extraction with

104. ## Calculus

Use the shell method to find the volume of the solid generated by revovling bounded by the curves and lines about the x-axis. y= sqrt(x) y=0 and y=(x-5)/4. I tried thsi problem and got 775/6pi as the final exact answer and its wrong. please someone help!

105. ## Physics

Vector A is directed along the positive y-axis and has magnitude 5.0 units. Vector B is directed along the negative x-axis and has magnitude 6.0 unit. (a) What are the magnitude and direction of A + B? (b) What are the magnitude and direction of A − B?

106. ## math

A circular walkway has a diameter of 182 m. Approximate the distance around the walkway. Use for 22/7 for square root?

107. ## Math 8R - HW Qs. Check

Topic - Logic In the clues below, each variable represent a different digit ranging from 0-9. Determine what digit each variable represent g+g+g = d (3+3+3 = 9) j+e = j (2+0 = 2) g (to the 3rd power) = d (3, to the 2nd power = 9) b+9 = d (6+3 = 9) f-b = c

108. ## algebra 1 stat question

fastest recorded speeds of various large wild cats (miles per hour) 70,50,30,40,35,30,30,40,15. The standard deviation of is 14.01 and the mean is 37.7 I have created a dot plot of the data and now I need to find out within how many standard deviations of

109. ## Physics

What is the speed of the rocket when it is 350 above the surface of the earth? A rocket starts from rest and moves upward from the surface of the earth. For the first 10 of its motion, the vertical acceleration of the rocket is given by a(y)=2.9, where the

110. ## Math 8R - Help!

Sara went to the park and saw that there were a total of 15 bicycles and tricycles. If the total number of wheels was 39, how many tricycles were there? bi = 2 wheels tri = 3 wheels Please help me, I'm really struggling with this problem

111. ## Physical science

A 6.2 "kil" bag of sugar is on a counter. How much work is required to put the bag on a shelf a distance of 0.31 m. above the counter?

112. ## math

The ratio of red jelly beans to yellow jelly beans in a dish is 2:3. If I eat 3 red jelly beans and 6 yellow ones the ratos is 4:5. How many yellow jelly beans were orginally in the dish?

113. ## math

The population of a town is given by P =350t + 5000, where t is years after 1980. Teh input variable is what? and the Outpur variable is what? the ordered pairs are in the form of what. and what is the meanng of P(0) = 85000 in the context of this problem

114. ## HISTORY

what 3 major beliefs were at the hear of Martin Luther's teachings?

115. ## chemistry

c= q/m*(delta)T q= heat or energy, measured in joules (J) c= specific heat of the substance m= mass of substance (delta)T= change in temperature It requires 14,749 J to heat 75.0 g of water from 20.0 degrees C to 67.0 degrees C?

116. ## physics

A hot air balloon is traveling vertically upward at a constant speed of 5.3 m/s. When it is 25 m above the ground, a package is released from the balloon. After it is released, for how long is the package in the air? The acceleration of gravity is 9.8

117. ## Fluid Mechanics

Calculate the pressure at a point 5 m below the free water surface in a liquid that has a variable density given by equation o =(350+Ay)kg/m3, where A = 8 kg/m4 and y is the distance in meters measured from the free surface.

118. ## Chemistry

When hydrogen reacts with a metal, does it form a cation or an anion?

119. ## Health and Nutrition

What foods are considered healthy sources of carbohydrates?

120. ## physics

ajuggler tosses a ball up in the air with initial speed u. at the instant it reaches the maximum height H, he tosses a second ball with the same initial speed the two balls collide at what height

121. ## physics

The eye of a hurricane passes over Grand Bahama Island in a direction 60.0° north of west with a speed of 36.1 km/h. Three hours later, the course of the hurricane suddenly shifts due north, and its speed slows to 26.9 km/h. How far (in km) from Grand

122. ## Math 8R - HW Qs. Check

Topic - Logic In the clues below, each variable represent a different digit ranging from 0-9. Determine what digit each variable represent g+g+g = d (3+3+3 = 9) j+e = j (2+0 = 2) g (to the 3rd power) = d (3, to the 2nd power = 9) b+9 = d (6+3 = 9) f-b = c

123. ## Physics

An airplane moves at 300 mi/hr relative to the air. It must fly from city A to city B, 600 miles due east. One day the wind is blowing at 100 mi/hr in a direction of 30 degrees north of east. Draw a diagram. b. What will the velocity of the plane relative

124. ## physics

On a spacecraft two engines fire for a time of 581 s. One gives the craft an acceleration in the x direction of ax = 5.21 m/s2, while the other produces an acceleration in the y direction of ay = 7.34 m/s2. At the end of the firing period, the craft has

125. ## algr.1

1/4n+12>3/4n-4 solve the inequality and please show the steps I don't understand how to work it Thanks

126. ## physics

Samantha is 1.15 m tall on her eleventh birthday and 1.32 m tall on her twelfth birthday. By what factor has her height increased?

127. ## Spanish-someone could check these

DIRECTIONS: Write a complete sentence using the verb ser. 1. Andy García y Jimmy Smits / los Estados Unidos -Nosotora somos de los Estados Unidos 2.Ricky Martin / Puerto Rico -El es de Puerto Rico 3. Enrique y Julio Iglesias / España - Ellos es de

128. ## STATISTICS

if the mean is 85 and the SD is 8 what percentage of students will receive a grade less than 58 and greater thAN 110

129. ## English 8R - Business Letter Assignment Check

(my English teacher's name) Care of (my full name) (school's address) 9/10/12 President Barack Obama The White House 1600 Pennsylvania Avenue NW Washington, DC 20500 Dear President Obama: Hello my name is (my name). I'm doing this assignment for my English

130. ## CHEMISTRY

In a chemically active extraction, a three-component mixture of acetylsalicylic acid, acetaminophen, and caffeine in ethyl acetate solution is separated into its individual components first by extraction with a pH 8 buffer solution, then a subsequent

131. ## Chemistry

What does the reaction of alkaline earth metals with water tell you? Thanks in advance.

132. ## case management

Identify the differences and similarities of case management in the community setting and in the managed care environment?

133. ## Physics

An experimental rocket car starting from rest reaches a speed of 530 km/h after a straight 370 m run on a level salt flat. Assuming that acceleration is constant, answer the following questios. - what was the time of the run?(s) - What is the magnitude of

134. ## Chemistry

Elements with an even number of protons and neutrons A. never undergo alpha decay emission. B. have a single magic number of protons or neutrons C. always have a proton-to-neutron ratio of about one D. are usually stable E. are usually unstable

135. ## algebra 1

I have found standard deviation and the mean for a data set and have created a plot of the data now I have to find within how many standard deviation of the mean does all the data fall and I am not sure how to do this

136. ## Grammar

Exercise C: (1) Select one of the subjects below. (2) Make a list of ideas to support your subject. (3) Decide what you main points should be and group the other ideas under them. (4) Prepare the outline according to the proper form. Make sure your points

137. ## finite math

Given n(A')=23, n(B')=16, and n((A [intersect] B) U (AUB)'))= 24, find (A [intersect] B) I apologize but intersect was the best way I found to represent the upside down U symbol.

138. ## science

I need helping locating information about the environment of Costa Rica so that I can analyze data about the country.

139. ## chemistry

How many moles are in 15 grams of Lithium oxide? I got 5.0205 mol Lithium oxide but I just wanted to see if anyone else got this.

140. ## Math

Hey guys this is a precalculus honors question and im stuck, appreciate it if i could get your help. Lauri is a sea level and uses surveying equipment to sight the top of Mount Tam. The angle of elevation to the top is 22 degrees 10 minutes. She moves 1000

141. ## algebra/trigonometry

find the smallest positive number that is the difference of two three-digit integers made up of the digits 1, 2, 3, 6, 7, 8 where each digit is used once.

142. ## math

price of 5 litres of cooking oil is rs. 302.50. find the price of 1 litre cooking oil

143. ## Math

The three lines x-y+1=0 ,2x+y-4=0 ,and x+y+5=0 intersect to form a triangle. Find the coordinates of the vertices of the triangle.

144. ## Physics

While standing on a bridge 18.3 m above the ground, you drop a stone from rest. When the stone has fallen 2.60 m, you throw a second stone straight down. What minimal initial velocity must you give the second stone if they are both to reach the ground at

145. ## math

if the universal set U is defined by U={1,2,3,4,5,6,7,8,9,10}and A={1,2,3,4} B={3,4,5,6,7} what is contained in A n B'=the intersection of A and B'?

146. ## Math

Write an algebriac expression 1. the quotient of m and two Tell rather the statement is true or false: 2. quotient of 3 and 12 is 4

147. ## Physics

i.imgur. com/VWFwb. png

148. ## Health and Nutrition

Describe how sugars are used in the body. What is insulin and its primary role? What is glucagon and its primary role? what is glycogen?

149. ## Literacy

What are the subject headings for the 2002 edition of Invisible Man

150. ## English

I don't really understand what this quote means ? "Fiction must stick to facts and the truer the facts the better the fiction.”

151. ## Geometry

Line MN is perpendicular to line NP. Point R is in the interior of the angle MNP. If angle MNR = 5x+12 and angle PNR =6x+23. Find both angle measures

152. ## Math 8R - Help!

Sara went to the park and saw that there were a total of 15 bicycles and tricycles. If the total number of wheels was 39, how many tricycles were there? bi = 2 wheels tri = 3 wheels Please help me, I'm really struggling with this problem

153. ## Chemistry

Why is the use of tin limited?

154. ## Math

Write 23 in base five

155. ## CHEMISTRY

HOW MANY GRAMS OF CALCIUM IS 3.08 MOL OF Ca?

156. ## physics, science

if proton is fired from west is moved to north by magnetic field what is direction of magnetic field

157. ## economics

main characteristics of the market system

158. ## algebra

Compute the following sums and differences -7+(-2) Does that mean just add them or...

159. ## physics

i.imgur . com/jXIYL. png is it 20 and 10??

160. ## Physics

A car races at a constant speed of 25 m/s around a circular track with a radius of 150 meters. Consider 1/4 of a lap starting on the south side (heading east) and ending on the east side (heading north). A. How much time does the car take to travel between

161. ## physics

i.imgur. com/cqwun. png

162. ## Psyhology

Why is it important to consider non-verbal communication from a cultural perspective when performing a patient diagnosis?

163. ## Calculus

Show that non positive rational number, x, exceeds its cube, x^3 by exactly 1.

164. ## College Biology

Calculate the concentration in Moles for a 5mgMgCl2 sample in 2L of solution. Then how many ions are in it?

165. ## math

What is the compatible estimation for 329 + 64

166. ## math

It was kind of windy the other day bring the temperature from -10 degrees centigrade to 18 degrees centigrade in 24 hours. How much did the temp. rise in 24 hours? on average, how much per hour did the temp. rise?

167. ## Linear Algebra

So I'm studying for my first exam and I'm stuck on this number. Given both lines: D1: (x,y,z) = (2,0,0) + k(0,3,0) D2: (x,y,z) = (2,0,2) + k(0,0,1) (a) Give the algebraic equation of the plane containing both lines. I know that I have to start off by

168. ## Crossword

7 letter word for deepest part of a body of water

169. ## Math

Convert 1111two to base ten

170. ## math

I have a math question for my cell biology class. A molecule exchanges places with its neighbor every 10^-7 seconds. It will diffuse from one end of a 2 micrometer cell to the other in 1second. Ok now I have a 6M x 6M room filled with 4cm ping pong balls.

171. ## science

how do you do the worksheet JELLY SIDE DOWN?

172. ## Chemistry

What is the density of a solution of 9.0% Calcium chloride dissolved in water?

173. ## Math

Simplify 5(-3+3)

174. ## physics

what is the displacement of the ball? i.imgur. com/8ljWh . png i don't know calculus!

175. ## math

what is the length of a diagonal of a rectangular picture whose sides are 3 inches by 4 inches

176. ## Physics

A 0.5kg ball is thrown over a net and gains 36J of energy. What is the velocity of the ball as it passes over the net?

177. ## Physics

While standing on a bridge 19.1 m above the ground, you drop a stone from rest. When the stone has fallen 3.40 m, you throw a second stone straight down. What minimal initial velocity must you give the second stone if they are both to reach the ground at

178. ## Algebra 1

when the cost of a car is multiplied by 0.07 the results is \$1710. Find the cost of the car.

179. ## Math

The base of tringular field is twice its altitude. If the cost of levelling the field at the rate of Rs 10per m^2 is Rs 4000,find its base and altitude.

180. ## math

If A, then B is equivalent to If not B, then not A Not (A and B) is equivalent to not A OR not B Not (A or B) is equivalent to not A AND not B Can you give an equivalent statement to 1. If an Iowa farmer does not grow corn or beans, then he grows alfalfa.

181. ## Algebra

So I'm working on this diamond thing and it looks like this right now -8 (Blank) (Blank) 7 And I usually I multiply to get the top number and add to get the bottom one, but since the top and bottom are filled how do I get the left and right blank ones?

182. ## Health and Nutrition

Information on lactose intolerance related to carbohydrates and how it effects the body. And some actions used to manage and treat the disorder.

183. ## calculus

If (x) =3x squared - x cubed, find f prime(1) and use it to find an equation of the tangent line to the curve y=3(x) squared - x cubed at a point (1,2)

184. ## ancient world history

To what continents did homo sapiens migrate from Asia

185. ## Chemistry

How do “chemical” salts form? Thank you in advance.

186. ## School counsil

What benefits would you receive when you help out school orientation? How grocery shopping with elders?

187. ## Chemistry

A watch is to be electroplated with gold. - provide a solution that would make a suitable electrolyte for this cell. This is the only question I'm having a little trouble with. I'm not quite sure how to figure out what the electrolyte solution is made of.

188. ## math

combine and simplify... 1/(1+(1/x)) I don't know how to start this one? I know I have to get rid of the bottom x

189. ## chemistry

how to complete (2.8 x 10 to the 7th) x (8.8 x 10 to the 4th) in scientific notation

190. ## History

How did geography of North America help or hinder our nation's development?

191. ## math

8.897*10^6/ 3.2*10^4= ? in scientific notation form

192. ## Linear Algebra 2

This is another question I can't figure out. Given planes pie1 and pie2 defined as: pie1: 2x + 5y - 7x + 2 = 0 pie2: x + y - z + 3 = 0 (b) Give the equation of the line of intersection of these two planes. I only found the answer for (a) where they ask to

193. ## Calc2

Find the volumes of the solids generated by revovling the region in the first quadrant bounded by the curve x=4y-4y^3 and the y-axis about the given axes: a. the x-axis b. the line y=1 NO idea how to set it up!!! HElP!!

194. ## legal research and writing

review the sentences and determine which one is correct A. The judge admonished the prosecutor and defense attorney who was distracting the jury from the facts of the case. b. The judge admonished the prosecutor and defense attorney who were distracting

195. ## Geometry

If AB=3x, BC=2y+16, AC=60 and B is midpoint of AC, what are the values of x and y?

196. ## legal research and writing

Review and revise the following paragraph. After reviewing al the pleadings the underlining records the party arguments; pertinent caselaw and the other recommendations filed byt eh party's, this court remains of the opinion and view point that the

Add (9.3x10^3) + (9.3x10^4) + (0.011x10^6) using correct significant figures?

198. ## English

1. You must have walked long, musn't you? 2. Tom must gets up early, mustn't he? 3. Ann seldom goes to the movies, does she? (Are they all grammatical?)

199. ## CHEMISTRY

HOW MANY MOLES OF CALCIUM IS 139g OF Ca?

200. ## HISTORY

why did the clergy support Martin Luther's ideas?

201. ## Math

Find the equivalent number on the 12hour clock -22

202. ## Precalculus

Assume the two planes are heading 'towards P'. For now, let's not get too wound up about the x and y aspects. We'll always 'know' the two places are at right angles to each other. First let's create two equations that represent the 'location' of each

What is meant by: Make three tracks from what you've read today.

204. ## Physics

The displisacement from A to B is 36 miles at 12 degress N of West. The displacement from B to C is 39 miles at 21 degrees N of E. What is the displacement from A to C by graphical means and by compnents?

205. ## science

Has anyone written up a Lab for the Sponge Capsule lab? I am trying to do a graph

206. ## Sociology

When a parent gives a child a time-out for misbehavior, the parent is using what type of sanction? a) Positive formal b) Positive informal c) Negative formal d) Negative informal I'm thinking either (b) or (d)

207. ## mahar

what is scientific notation for 778

208. ## chemistry

what is the density of a substance if a 2.50 ml sample has a mass of 0.880g at room temperature? what is the specific gravity of the substance?

209. ## History

What are three ways in which the Americas might have been populated?

210. ## Math

In a trapezium ABCD,ABperpendicular DC.if angle A=4x degree,angle B=(6x+10degree),angle C=(3x-10degree) & angle D=5x degree.find each angle of trapezium.

7/11~3/5=

212. ## CHEMISTRY

HOW MANY MOLES OF LITHIUM IS 2.69XE9

213. ## CHEMISTRY

HOW MANY ATOMS 0.151 MOL OF LITHIUM?

214. ## Math

Simplify 5(-3x+3)

215. ## math

1. Ronnie has 4 pennies and 5 dimes in her pocket. How much money does she have in all? 2. Sophie picked 7 apples ad gave 2 to Jules. Ho may does she have left? 3. Melville is 104 miles east from Seville. Medburg is 206 miles east of Seville. How many

216. ## Math

Find the value of y in the mod 11system 10+y=1

217. ## Algebra

x*x= x+x= axb= a+b=

218. ## precalculus

if f(x)=2x and g(x)= x+1 , what do you think someone means by (f+g)(x)? what about (f/g)(x)?

219. ## math

35% in building A,20% in building B ,and 26% in building c what percent of employees are in building D

220. ## history

where did martin luther start his revolution?

221. ## algebra

Perform the subtraction. (4x/x^2+2x-8)-(x/x^2-16)

222. ## College Physics

A 6107 kg elevator is moving 4.6 m/s up. The tension in the elevator cable is 66,512.6 N. Determine the acceleration of the elevator (state the appropriate mks units).

223. ## intentive spellers typically

a. write only words they are certain can be spelled corrctly. b. never learn conventional spelling c. omit consonants in words d. Progress through a serious of stages

224. ## math

8.875*10^-5/ 3.65*10^3= ? in scientific notation form

225. ## math

the sum of 16 and 3 is greater then the product of 9 and 2

226. ## math

how can you determine whether a sum of several numbers such as 13plus45plus24plus17 is even or odd?

227. ## History

What are the new understanding of the population of the Americas before Eropian contact?

228. ## maths

If f(x)=x(2pi-x) in 0

229. ## math

the second largest six-digit number in which no digit appears more than three times

230. ## Math

Perform the multiplication on the 12 hour clock 11x(4x8)

231. ## math

how many different license plates are possible with two letters followed by three digits between 0 and 9

232. ## math

how to solve 3m-6=3x10-6

233. ## Philosophy

What is your philosophy of education?

234. ## math

Think about the expression xy=50. What are six possible values for x and y?

235. ## social studies

how i identify 5-7 positive and negative benefits of the government systems for canada ?

236. ## Algebra....HELP!!

Use the elimination method to solve the system of equations a + 6b =4 a + 3b = -2 What is the solution in an ordered pair?