1. science

When was the origin of the universe?

2. Chemistry

In a chromatography experiment, a solution was prepared by mixing 12.98 mg of isopropanol plus 10.00 mL of an unknown containing some acetone, and diluting to 25.00 mL. Signal of 5.97 and 6.38 were observed for the acetone and isopropanol, respectively. In

3. english

She thought she saw a stranger, but he turned out to be her neighbor who was back from vacation early. this would be a compound sentence, correct?

4. Mathematical methods

Following completion of your weekly readings, complete the exercises in the “Projects” section on page 397 of Mathematics in Our World. You should be concise in your reasoning. For Project #1, work only equations (a) and (c), but complete all 6 steps

7. Newton's Law of Cooling

You are a forensic doctor called to a murder scene. When the victim was discovered, the body temperature was measured and found to be 20°C. You arrive one hour later and find the body temperature at that time to be 18°C. Assuming that the ambient

8. trig/precalculus

A crate weighing w pounds sits on a ramp positioned at an angle of x with the horizontal. The forces acting on this crate are modeled by the equation Mwcosx = wsinx, where M is the coefficient of friction. What is an expression for M in terms of x? A. M =

9. calculus

Use the fundamental theorem of calculus to evaluate the following integral ∫^π/2 **the bottom is zeroe. |cosx| dx

10. calculus

Sketch the region bounded by the graphs of the algebraic functions & find the area of the region: f(x)=10/x, x=0 , y=2, y=10 I started idk how to keep going y = 10/x for x -->x = 10/y

11. math

draw apieceof yarn3 counters

12. math

a refreshment stand at the fair was open for 3 hours. four people each took turns working at the stand for the same amount of time hoe many minutes did each person work ?? HELP PLEASE !!!

13. MATH

cereal is good source of protein . how many quarter cups of cereal are there in 6 1/4 cups ??

14. oceanography

how did the ocean form?

15. PreCalculus

I need help with a Matrix Algebra problem A small school has 100 students who occupy three classrooms A, B, and C. After the first period of the school day, half the students in room A move to room B, one-fifth of the students in room B move to room C, and

16. Anthro

“How do images challenge our assumptions and understanding of society as relatively cohesive, homogenous and stable social units?” (feel free to simply summarize potential ideas)

17. Finite Mathematics

I just need help with the set up of this problem, that's where I'm getting lost. A mining company operates two coal mines, M1 and M2. The company sells the coal to three purchasers: two steel mills P1 and P2, and a power generating station P3. The cost of

18. english

Should i use the word by, of, as..in this sentence? John doesn’t know who or what to believe, for he has never experienced the cruelties by white people, like his father had.

19. physics

A 43 kg, 5.3-{\rm m}-long beam is supported, but not attached to, the two posts in the figure . A 23 kg boy starts walking along the beam.How close can he get to the right end of the beam without it falling over?

20. physic:(

Two ice skaters, Daniel (mass 70.0 ) and Rebecca (mass 45.0 ), are practicing. Daniel stops to tie his shoelace and, while at rest, is struck by Rebecca, who is moving at 14.0 before she collides with him. After the collision, Rebecca has a velocity of

21. physic:(

Starting at = 0 , a horizontal net force 0.280 (-0.440 is applied to a box that has an initial momentum -2.90 4.10 .

22. English

Is it correct to use the simple past when referring to Poe's ideas and the present when referring to the characters in his tales? 1) Poe believed(simple past) that this impulse, which was hidden in every material and spiritual portion of the universe,

23. Math for Liberal Arts

You have a 5 minute hour glass and an 8 minute hour glass. You need to cook something for exactly 9 minutes. How will you use the two hour glasses to determine the exact time? There is no way to determine where the halfway mark is with the hourglasses.

24. physics

Two motorcycles are traveling in opposite directions at the same speed when one of the cyclists blasts his horn, which has frequency of 544 Hz. The other cyclist hears the frequency as 522 Hz. If the speed of sound in air is 344 m/s, what is the speed of

25. English

I left out the last two sentences. Thank you. 1) Walton is the double of Frankenstein since he manifests the same ambition, the wish to overcome (go beyond is possible?) human limits in his travelling towards the unknown. 2)Frankenstein and his creature

26. oceanography

What is the relative density of seawater. granite rock. basaltic rock. mantle

27. Statistics

Suppose you gave a skill test to 3 different PE classes and want to know if they differ in terms of their scores. The skill tests scores are as follows: Class 1: 23, 21, 19, 22 Class 2: 18, 19, 21, 18 Class 3: 21, 20, 19, 22 Conduct an ANOVA and report the

28. Chemistry

A compound of the element A and oxygen has a mole ratio of A:O=2:3. If 8.0 grams of the oxide contains 2.4 grams of the oxygen, a. What is the atomic weight of A? b. What is the weight of one mole of the oxide? c. What theoretical weight of the oxide is

29. pharcare

human development and its dominant characteristics,please give me the link I can't find it.thanks:)

30. chemistry

Compound C (MW = 550) is provided at a concentration of 25g/100mL. 1mL is taken and compound D is to be added (MW = 1025, concentration = 75mM) to give a final ratio of compound C:D of 4:1 . What volume of compound D is to be added? ''DR BOB 222 IT IS A

31. chemistry

By reference to Molecular orbital Theory and giving the appropriate MO diagrams explain why the bond in N2 is very strong short (bond dissociation entalpy 945 kjmol-1,bond length 109.8 pm) while that in O2 is weaker and longer (bond dissociation entalpy

32. chemistry

using VSEPR THEORY SHOW WHY 1)BF4- is a tetrahedral molecule 2)SF3+ is a Trigonal pyramidal molecule 3)ICI4- IS A SQUARE PLANER molecule 4IF5 IS A SQUARE pyramidal molecule 5)PF5 IS A TRIGNAL BIPYRAMIDAl molecule

33. chemistry

using VSEPR THEORY SHOW WHY 1)BF4- is a tetrahedral molecule 2)SF3+ is a Trigonal pyramidal molecule 3)ICI4- IS A SQUARE PLANER molecule 4IF5 IS A SQUARE pyramidal molecule 5)PF5 IS A TRIGNAL BIPYRAMIDAl molecule

34. chemistry

using VSEPR THEORY SHOW WHY 1)BF4- is a tetrahedral molecule 2)SF3+ is a Trigonal pyramidal molecule 3)ICI4- IS A SQUARE PLANER molecule 4IF5 IS A SQUARE pyramidal molecule 5)PF5 IS A TRIGNAL BIPYRAMIDAl molecule

35. chemistry

explain what is meant by the term 'Hybridisation' in molecular orbital theory and show how the concept can be used to explain the structure and bonding in ethane C2H6 ETHENE C2H4 AND ETHYNE C2H2

36. math

Hi would you please show how to know if the function is differentiable or not ? please show me the answer with examples

37. Language Arts

having some trouble deciding between which verb completes the sentence. Would it be "A bell lays or lies on its side? Also having trouble on the sentence, "The piano sets or sits on a platform." Thanks...

38. Statistics

What electrical changes occur in muscles as they get tired? student subjects are instructed to hold their arms above their shoulders as long as they can. Meanwhile, the electical activity in their arm muscles is measured. This is

39. Statistics

What electrical changes occur in muscles as they get tired? student subjects are instructed to hold their arms above their shoulders as long as they can. Meanwhile, the electical activity in their arm muscles is measured. This is

40. physics

Calculate the Mechanical Advantage for an incline plane that raises the load to 2.4 meters and has a length of 13.8 meters.

41. alg II

linear functions if g(fx) = 2x+6 f(gx) is a line through origin what is f(g2011)

42. psychology

What are the effects of type of processing and channel of presentation on recall of words? HELP!!!!!!!!!!!

43. MATH-IN URGENT NEED OF HELP!

About sequences.... (i) 32, 25,18,11,4 ____(Answer?) (ii)1,3,6,10,15 ____ (iii) 1,3,9,27,81 (iv)64,16,4,1,1/4(this is NOT a typo!)

44. statistics

Consumer Reports rated airlines and found that 80% of flights involved in the study arrived on time (that is, within 15 minutes of scheduled arrival time). Assuming that the on-time rate is representive of the entire commercial airline industry, consider a

45. chemistry

What is the pH of 14g of Ca(OH)2 dissolved to 350ml

46. math

Aimi is making Valentine's Day cards for everyone in her class. She plans to use a whole sheet of paper for each of her 5 closest friends. She will use 1/2 of a sheet of paper for everyone else in the class. She has 15 sheets of paper. How many cards can

47. trig/precalculus

A crate weighing w pounds sits on a ramp positioned at an angle of x with the horizontal. The forces acting on this crate are modeled by the equation Mwcosx = wsinx, where M is the coefficient of friction. What is an expression for M in terms of x? A. M =

48. Chmistry

Sodium metal dissolves in liquid mercury to form a solution called a sodium amalgam. The densities of Na(s) and Hg(l) are 0.97 g/cm3 and 13.6 g/cm3, respectively. A sodium amalgam is made by dissolving 1.0 cm3 Na(s) in 20.0 cm3 Hg(l). Assume that the final

49. Physics

Why did the chicken cross the road?

50. Chem

Zinc reacts with HCl to produce ZnCl2 and Hydrogen gas, H2. What volume, in ml of a 1.25 M solution would be required to completely react with 3.27 g of Zn? Zn(s) + 2 HCl (aq) -------> ZnCl2 + H2

51. Algebra

Solve (x-1)^2 = 16 please show steps

52. Algebra

Solve: squareroot 2x-1 - squareroot x+3 = 1 please show steps

53. math

Aimi is making Valentine's Day cards for everyone in her class. She plans to use a whole sheet of paper for each of her 5 closest friends. She will use 1/2 of a sheet of paper for everyone else in the class. She has 15 sheets of paper. How many cards can

59. Alg 2

Suppose you deposit a principal amount of p dollars in a bank account that pays compound interest. If the annual interest rate r (expressed as a decimal) and the bank makes interest payments n times every year, the amount of money A you would have after t

60. MATHS

a gun is fired at a distance of 24.3km away from man. he hears the sound after 27 second. find the speed of sound at which it travels.

61. Physics

A crate of mass 0.812 kg is placed on a rough incline of angle 35.3 degrees. Near the base of the incline is a spring of spring constant 1140 N/m. The mass is pressed against the spring a distance x and released. It moves up the slope 0.154 meters from the

62. physics

A gas of volume 2m^3 at 27C is heated to 327C at constant pressure. What is its new volume?

63. Literature

3. In "Of Plymouth plantation, at the first Thanksgiving, the Pilgrims are most thankful for a. the treaty they made with the American Indians b. the departure of loathsome sailors c. their store of game and corn d. the arrival of more people from England

64. Could you please check over my english? :)

I'm working on an English assignment and I've answered most of them, but I'm not too sure about these ones.. If you could check over my answers that would be amazing! Thank you so much in advance :) In the following sentences identify the main clause. Find

65. chemistry

If you make a solution by dissolving 25.0g of sodium chloride in 100.0 mL of water. What is the boiling point of the solution?

66. Stats

Consumer Reports rated airlines and found that 80% of flights involved in the study arrived on time (that is, within 15 minutes of scheduled arrival time). Assuming that the on-time rate is representive of the entire commercial airline industry, consider a

67. english

Fill the bags with donated gifts for the orphanage. The word BAGS is what kind of compliment? I.e. predicate adjective, direct object, indirect object, predicate nominative

68. Calculus

I'm doing test corrections, and it's been a few weeks since we did this, so I'm a little fuzzy. I'm supposed to find the zeros, relative extrema, and inflection points of f(x) = x^3 - 6x^2 + 3x + 10. The zeros would be -1, 2, and 5 right? Then I would take

69. confidentiallity in allied health

when should the computer bureau destroys or erases records,should the erasure be verified by the bureau to the physician?

70. chemistry

Jenny please show me in better detail the set up of the answer.

71. physics

The fist ball is thrown up ward with avelocity of 20m/s at the same instant. The second ball is dropped at 40m hight from the first ball at what time the two ball collide each other?

72. algebra

question can u answer 6x + 12 = 30

73. Language Arts

On the sentence, "The choir sat/set their hymnals on the bench." Would the correct verb be set?

74. physics

A speaker is designed for wide dispersion for a high frequency sound. What should the diameter of the circular opening be for a speaker where the desired diffraction angle is 11° and a 9100 Hz sound is generated? The speed of sound is 343 m/s

75. chemistry

balanced reaction for reaction between ferrous sulphate and nittric acid

76. chemistry

What mass of hydrogen peroxide should result when 1.50g of barium peroxide is reacted with 25.0mL of 0.50 M hydrochloric acid?

77. geometry

a regular hexagon is composed of 12 congruent 30,60,90 degree triangles. if the length of the hypotenuse of one of those triangles is 18 square root 3 find the perimeter of the hexagon

78. math

an equilateral triangle has an altitude length of 36 feet. determine the length of a side of the triangle

79. math

.) An architect is building a model of a tennis court for a new client. On the model, the court is 6 inches wide and 13 inches long. An official tennis court is 36 feet wide. What is the length of a tennis court? The architect decides to build a larger

80. math

for the event of rolling one die, find a.P(rolling atlease a 3) b.P( ROLLING AN ODD NUMBER)

81. Physical Science

A 75 kg astronaut in space pushes against a 200 kg navil. when the astronaut lets go of the anvil pushing it:

82. Economics

what is an economist view on this statement "It is not from the benevolence of the butcher, the brewer, or the baker that we expect our dinner, but from their regard to their own interest."

83. math

a ladder leaning against a wall makes a 60 degree angle with the ground. the base of the ladder is 4m from the building. how high above the ground is the top of the ladder?

84. plz plz plz help in science

An elastic object strikes to ground and compress when it touches the ground. What is energy transformation? a- gravitational to electric b- electric to gravitational c- A ---Answer i don't know which one is right for the second one. A study shows treatment

85. calculus

the curve f(x)=x^2 from x=0 to x=4 is revoloved around the axis x=5. Determine the volume of the solis of revolution using the method of curcular cross sections

86. algebra

Hi guys: Can any one please tell me what does this means? Thanks ---------------------------------------------------------------------- The second matrix is simply the symmetric version of the first. This 1 2 3 4 5 6 7 1 0 2 3 x 2 4 x 2 2 3 11 2 3 5 3 3 9

87. physics and guns

A spring gun is made by compressing a spring in a tube and then latching the spring at the compressed position. A 4.97-g pellet is placed against the compressed and latched spring. The spring latches at a compression of [01] cm, and it takes a force of

88. statistics

A consumer at a bread factory would like to know if there are differences (gender) in bread preferences. Forty adults were randomly selected and asked the following questions: Which type of bread do you prefer? They were instructed to only pick one bread

89. participles

Participles are sometimes confused with verbs because they _____? are the same forms used to make verb tenses appear in the sentence where the predicate usually goes always follow the subject describe nouns?

90. statistics

If 20% of the people in a community use the emergency room at a hospital in one year, find the probabilities for a sample of 10 people, a.At the most three use the emergency room. b.Exactly three use the emergency room c.At least five use the emergency

91. statistics

A researcher has collected statistics pretest scores for students representing 3 different age groups 18-30 31-45 45 and up 3 5 10 7 10 2 9 9 8 6 8 8 4 6 5 Do hypothesis test using ANOVA to find if significant difference. Use alpha .05. All hypothesis

92. math

What type of graph is best suited for displaying the range and frequency distribution of the number of hours the students in a class spend on homework while still showing each individual amount of time spent on homework?

93. MATH

Show that the direct sum of two integral domains (E and H) is never an integral domain.

94. participial phrases

Which sentence contains a participial phrase with an embedded clause? Running, giraffes look like something that was designed in a bad dream. Running when they heard the gunshots, the giraffes fled to safety. Tired and hot, they stopped when they found

95. English/Commas

I was asked to put all the commas in the correct place for each sentence. I am unsure about some. Are these correct? Thanks 1. As I understand it, John Pearson has lived in Winston Colorado, a small almost unknown tourist resort since August 10, 2002. 2. I

96. algebra

a particular hybrid car travels approximately 288mi on 6 gal of gas. find the amount of gas required for a 912-mi trip

97. physics

2. A freight train traveling with a velocity of 18.0 m/s to the south begins braking as it approaches the train yard. The train’s acceleration while braking is -0.33m/s2. What is the train’s speed after 23 seconds?

98. Geometry

Quadrilateral WXZY is a square. If YX = 30 and WT = 2x – 7, then find the value of x. (Points : 2) 4 18.5 11 15 or Quadrilateral JKLM is a rhombus. The diagonals intersect at N. If the measure of angle JKL is 104o, find the measure of angle JKN. (Points

99. Math

You are required to design a QBASIC program that receives a student test score and prints out her grade, the grading criteria is as follows =90 is A.

100. English

Hello. I'll appreciate some help. Do you think it's possible to use "accent" in the same meaning and context as "stress" or "emphasize", for example: "He accented that the administration would take further measures to stabilize the situation"? Thank you

101. math

how to find the first three zeros to the right of origin in a sinusoidal function?

102. math

consider the function: f(x)=3sin(2(x-30))-1 determine the first three x-intercepts to the right of the origin, rounded to the nearest tenth of a degree.

103. Stats

A new extended-life light bulb has an average service life of 750 hours, with a standard deviation of 50 hours. If the service life of these light bulbs approximates a normal distribution, about what percent of the distribution will be between 600 and 900

104. Biology

What is the difference between thromboplasin and factor Xa? I have in my notes that they both convert prothrombin to thrombin.

105. basics and tools of floral design

The fabric label doesn’t say if the linen was preshrunk. You test the fabric for shrinkage and determine it needs to be shrunk. How do you do this? A. Wash the material in cold water and dry on high in dryer. B. Immerse the material in hot water and drip

106. Social studies

How can I study my Western states for a test

108. pre calculus

Find the domain of the function h(x) = (x/ x-1) I need to know how to solve this, not just the answer! Help!

109. physics

the great gray-green, greasy zambezi river flowa over victoria falls in south central africa. the falls are approximately 108 m high. if the river is flowing horizontally at 3.60 m/s just before going over the falls, what is the speed of the water when it

110. physics

the great gray-green, greasy zambezi river flowa over victoria falls in south central africa. the falls are approximately 108 m high. if the river is flowing horizontally at 3.60 m/s just before going over the falls, what is the speed of the water when it

111. Algebra

The cost, in millions, to remove x% of pollution in a pond is modeled by the equation: . What is the cost to remove 75% of the pollution? Hint: Plug in and calculate, do not convert to a decimal.

112. geometry

Below is a scale of my garden. It is drawn at 3in: 8ft scale. To the nearest whole squre foot what is the area of my garden? **picture of octagon with one side 8in**

113. Algebra

Scientists want to set up and test animals in the area for West Nile. The costs to test are $2,200 for setup plus$1.50 to administer each test. Write an expression that gives the total cost to test x animals. Hint: An expression is a combination of known

114. algebra

there are approximately 4lb of muscle for every 5lbs of body weight of a certain animal for a 115-lb animal how much of the weight is muscle

115. algebra

how high is a tree that casts a 30ft shodow at the same time a 12ft pole casts a shodow which is 6ft long

116. science

1. What was wrong or why do you think people rejected Wegner's idea of continental drift? 2. Explain why some partly molten lava rises toward Earth's surface.

117. English

Is it "'un-acknowledged" or "unacknowledged" or neither of these and there is no such word? (I'm trying to write an essay.) Thanks!

3(d+2)-d=16

30=3c+2(3c-3

120. physics

an astronaut on the planet zircon tosses a rock horizonally with a speed of 6.95 m/s. the rock falls through a vertical distance of 1.40 m and lands a horizontal distance of 8.75 m from the astronuat. what is the acceleration of gravity on zircon?

122. college english

what does denotation mean when referring to writing?

123. algebra

The period t ( in seconds) of a simple pendulum as a function of its length l(in feet) is given by t(l) = xpie sqrt 1/32.2 a. Express the length l as a function of the period t b. How long is a pendulum whose period is 3 seconds. Is the answer 2 sec for a

124. people

Justin's new telephone number is 663-7589. He frequently tells people that it is 633-7589. He is puzzle as to why he keeps doing that until he realizes that the first three digits of his socils security number are 633. Justin realizes that his problem is

125. physics

playing shortshop, you pick up a ground ball and throw it to second base. the ball is thrown horizontally with a speed of 22 m/s ditectly toward point a. when the ball reaches the second baseman 0.45 s later, it is caught at ponit b. (a) how far were you

126. college english

what would an exemplification essay be about?

127. Math - Exponentials

How do I approach the following problem. Please don't give answer but just guidance as to how to approach these in general. I need to be able to solve without a calculator. 3^(2x+1)-16(3^x)+5=0

128. Algebra

Can anyone solve this PPPPPlease 5/x-3 + 2/x+3= -7x/x^2-9

129. social studies

"mission civilisatrice" is best described as A) a movement in which the french tried to implant french culture into first nations peoples B) a french residential school designed to civilize the iroquois C) the french version of social darwinism D a

130. Algebra

Speed of passenger train is 6mph faster than the freight train. The passenger train travels 260 miles at the same time the freight train travels 230 mph. WHAT would be the speed of both the passenger and freight trains?????

131. physics

a mountain climber jumps a 3.0 m wide crevasse by leaping horizontally with a speed of 8.0 m/s. (a) if the climber's direction of motion on landing is -45 degrees, what is the height the difference between the two sides of the crevasse? (b) where does the

132. History

Compare and contrast the war efforts of the united states to remain neutral in World War 1 and World War 2.

133. algebra

find the variation constant and an equation of variation where y varies directly as x and y=35 when x=5 the variation constant is k=

A researcher has collected statistics pretest scores for students representing 3 different age groups 18-30 31-45 45 and up 3 5 10 7 10 2 9 9 8 6 8 8 4 6 5 Do hypothesis test using ANOVA to find if significant difference. Use alpha .05. All hypothesis

135. math

7k-8k=1 how would you do this?

136. marine systems

What 3 physical factors determine the distribution of life in the ocean?

137. English

Could you please check these sentences? Thank you. 1) Prospero lost his dukedom because of a plot set up by his wicked brother Antonio together with the king of Naples. 2) Prospero is not native to the island. 3) Thanks to his magic art Prospero subdued

138. Science

How do fluids move towards rocks??? plz answer me :D

139. physics

a truck is moving 15m/s North. after 7.9 has elapsed it is moving 55m/s North. determine the truck's acceleration and determine its displacement during the elapsed time.

140. plz plz plz help me with this problem!

A consumer at a bread factory would like to know if there are differences (gender) in bread preferences. Forty adults were randomly selected and asked the following questions: Which type of bread do you prefer? They were instructed to only pick one bread

141. physics

The Near Earth Asteroid Rendezvous (NEAR), after traveling 2.1 billion km, is meant to orbit the asteroid Eros at a height of about 15 km from the asteroid's center. Eros is roughly box-shaped, with dimensions 40 km 6 km 6 km. Assume Eros has a density

142. Physics

A race driver has made a pit stop to refuel. After refueling, he starts from rest and leaves the pit area with an acceleration whose magnitude is 5.4 m/s2; after 3.7 s he enters the main speedway. At the same instant, another car on the speedway and

143. Science

Hi, Could someone help me with this science homework? Symbiotic Relationships in the Baltimore Checkerspot Butterfly's Habitat Under this it has 2 titles: 1. Organisms _______________ _______________ _______________ _______________ 2. Type of symbiosis

144. Physics

In getting ready to slam-dunk the ball, a basketball player starts from rest and sprints to a speed of 11.1 m/s in 2.30 s. Assuming that the player accelerates uniformly, determine the distance he runs.

145. Physics

A jetliner, traveling northward, is landing with a speed of 66.5 m/s. Once the jet touches down, it has 766 m of runway in which to reduce its speed to 13.1 m/s. Compute the average acceleration (magnitude and direction) of the plane during landing (take

146. Physics

Before starting this problem, review Multiple-Concept Example 6. The left ventricle of the heart accelerates blood from rest to a velocity of +20.6 cm/s. (a) If the displacement of the blood during the acceleration is +2.87 cm, determine its acceleration

147. Physics

In preparation for this problem, review Conceptual Example 7. From the top of a cliff, a person uses a slingshot to fire a pebble straight downward, which is the negative direction. The initial speed of the pebble is 6.46 m/s. (a) What is the acceleration

148. Physics

A diver springs upward with an initial speed of 2.23 m/s from a 3.0-m board. (a) Find the velocity with which he strikes the water. [Hint: When the diver reaches the water, his displacement is y = -3.0 m (measured from the board), assuming that the

149. Physics

A race driver has made a pit stop to refuel. After refueling, he starts from rest and leaves the pit area with an acceleration whose magnitude is 5.4 m/s2; after 3.7 s he enters the main speedway. At the same instant, another car on the speedway and

150. geometry

A farmer has 30yd of fencing and wants to enclose an area beside his barn. What are the dimensions of the region of maximal area, and what is that maximal area if the region is an is isosceles triangle with its base along side of the barn. Given -> legs of

151. physics

Over a time interval of 2.37 years, the velocity of a planet orbiting a distant star reverses direction, changing from +23.4 km/s to -15.7 km/s. Find (a) the total change in the planet's velocity (in m/s) and (b) its average acceleration (in m/s2) during

152. physics

In an historical movie, two knights on horseback start from rest 90.6 m apart and ride directly toward each other to do battle. Sir George's acceleration has a magnitude of 0.340 m/s2, while Sir Alfred's has a magnitude of 0.346 m/s2. Relative to Sir

153. physics

A drag racer, starting from rest, speeds up for 384 m with an acceleration of +19.3 m/s2. A parachute then opens, slowing the car down with an acceleration of -6.33 m/s2. How fast is the racer moving 302 m after the parachute opens?

154. physics

The velocity of a diver just before hitting the water is -11.1 m/s, where the minus sign indicates that her motion is directly downward. What is her displacement during the last 1.18 s of the dive?

155. english

what is the complete subject and complete predicate in this sentenance A program arranges pictures on a page, and it lays out type as well.

156. physics

Two stones are thrown simultaneously, one straight upward from the base of a cliff and the other straight downward from the top of the cliff. The height of the cliff is 6.86 m. The stones are thrown with the same speed of 9.78 m/s. Find the location (above

157. math

there are 33 students in Miss benton's class. There are 5 more girls than boys. How many girls are in Miss Bentons class

158. math-probability

betsy goes running 2 days out of 7 and james goes running 5 days out of 7. What is the probability that one of them is running on any given day.

159. Developmental Psychology

According to continuity theory, the Big Five personality traits

160. pigskin

I need help with week 14 please!!

161. History

Why Do You Think It Was Hard For Spain To Maintain It's Empire ?

162. physics

two canoeists start paddling at the same time and head toward a small island in a lake. caneist 1 paddles with a speed of 1.35 m/s at an angle of 45 degrees north of east. canoeist 2 starts on the opposite shore of the lake,a distance of 1.5 km due east of

163. social studies

"mission civilisatrice" is best described as A) a movement in which the french tried to implant french culture into first nations peoples B) a french residential school designed to civilize the iroquois C) the french version of social darwinism D a

164. world history

What were the goals and results when rejected Darius' peace settlement of all land west of Euphrates river

165. Can anyone do statistics?

I am trying to get help with my statistic hw. There are ANOVA test and hypothesis testing. If someone is able to help me please let me know! So far noone has been brave enough!

166. Extra Credit Projects

I'm doing some extra credit projects for all of my classes (maybe gym idk). Is there any extra credit ideas I can do for the following classes: English, Math (something small), Fine Art, Social Studies, and Gym. Science I got it covered (doing 2 huge extra

167. trig

By expressing 3x as (2x + x) prove that cos3x = 4cos^3x - 3cosx

168. healthcare quality management and outcomes

why is risk management important in organizations? what benedits are gained by implementing a risk-management program

169. trig

By expressing 3x as (2x + x) prove that cos3x = 4cos^3x - 3cosx

170. chemistry

If you filled three balloons with eaqual volumes of hydrogen, argon, and carbon dioxide gas all at the same temperature and pressure, which ballon would weigh the most? The least?

171. English

what is the complete subject and complete predicate on the following sentances 1. Angela's favorite program changes the colors and sixes of images. 2. Graphic artists can choose a percentage of red, blue or yellow. 3. They can also focus a photograph, or

172. algebra

how high is a tree that casts a 30ft shodow at the same time a 12ft pole casts a shodow which is 6ft long

173. Math- Anova

A researcher has collected statistics pretest scores for students representing 3 different age groups 18-30 31-45 45 and up 3 5 10 7 10 2 9 9 8 6 8 8 4 6 5 Do hypothesis test using ANOVA to find if significant difference. Use alpha .05. All hypothesis

174. algebra

the number of kilograms of water in a human body varies directly as the mass of the body an 87kg person contains 58kg of water how many kilograms of water are in a 72-kg person

175. Calculus

The marginal cost of a certain commodity is C'(x)= 3x^2 -36x + 120 If it costs 5 dollars to produce 1 unit, then find the total cost of producing x units is... Please how do I find the total cost?

176. math

Divanna scored 67% on her last test, If she had paid closer attention to signs, she would have had 2 more problems right and would have scored 80%. Write the expression for how many problems in all she would have answered correctly.

177. Trig

Which trigonometric function can equal or be greater than 1.000? A Sine B Cosine C Tangent D none of the above

178. algebra

the stopping distance d of a car after the brakes are applied varies directly as the square of the speed r if a car travelling 80mph can stop in 360ft, how many feet will it take the same car to stop when it is travelling 70mph

179. chemistry

list the numbers and types of atoms represented by these chemical formulas. a.Fe2O3 b.KMnO4 c.CH3 d.NH4NO3

180. physics

The Near Earth Asteroid Rendezvous (NEAR), after traveling 2.1 billion km, is meant to orbit the asteroid Eros at a height of about 15 km from the asteroid's center. Eros is roughly box-shaped, with dimensions 40 km 6 km 6 km. Assume Eros has a density

181. Trig

How do you find cosine, tangent, and cotangent periods?

182. Trig

In ABC, vertex C is a right angle. Which trigonometric ratio has the same trigonometric value as Sin A? A Sin B B Cosine A C Cosine B D Tan A

183. math

What is the length ofthis piece of string measure to the mearest 1/4 inch? A. 1 3/4 B. 2 1/4 C. 2 3/4 D. 3 1/4

184. math

Jackie is making window curtains for her window.Each curtain will be 108 inches long.Fabric is sold in yards.What is the length of each curtain in ysrds? A. 3 yards B. 9 yards C. 27 yards D. 36 yards

185. math

I need help please help me. There's a chart that has to have 16boxes. It has to be 4 by 4. Lable boxes that are vertical top to bottom 1,2,3,4 and boxes that are horizontal left to right A,B,C,D. Box 1A has to be 28,Box 1C has to be 34, box 2C has to be

186. Math

Do you have any ny state number and operation booklets for 7th graders.

187. Marh

Add or subtract to solve . Teri has 42 cent. Her mom give her 19 cent .now teri has

188. socials

[4:06:00 PM] shreya2010: question: Helping my brother Mohammad. What was foreign policy of canada in 1950's and 1970's.We are not sure what policy was. 1950's canada policy was to stay with u.s no matter what lend hand whenever they ask. and in 1970, it be

189. writing or literature

My teacher writes this prob. on the board but i don't get it!!_self-satisfaction _don't leave her at the alter _sea water _the very edge brick What is that!!!!!!!!!!!!!!!!!!!!!!!! Please please please help me!!!!!!!!!!

190. Science

What is the Range of Temperature of LukeWarm Water in Farenheit. Like 72 degrees to 89 degrees. Somewhat like that. please Help.

191. Scientific Method sort of relating to science

What are Two Factors that can affect how fast water evaporates?

192. Science

What are some observations about water? Such as the Different Perceptions from what you see. Included all your senses. I am Very Confused on how to write an observation for water? Please and thankyou i believe its cold water.

193. Trig

The set of solution(s) of 2 cos^2 (θ) - 13 cos(θ) + 6 = 0 that is(are) in the interval (0,π/2) is one of following a. {π/6} b. {π/3} c. {π/4} d. {π/3, π/6} e. {π/6, π/4}

194. Physics

What is the vector sum of a 65 N force acting due east and a 32 N force acting due west?

195. science

what are some good high school science fair project ideas that i can do in one month?

196. english

How do I cite APA Reference for an online site with no author that reads acknowledege Newpaper articles: The Statesman,The Telegraph Timir Ganguly's web site: Need ASAP Thanks

197. statistics

We want to determine the correlation between the height (in inches) and scoring average (points per game) of women on a college basketball team. To do this, we record the height and scoring average of two players on the team. The values are

198. physicsss ;o

a 12 V car battery is found to be capable of storing 2.0 kW*h of eletrical energy. for a certain eletric car, it is necessary to develop 10 kW of power to drive at 20 km/h. a)suppose that the car has 10 such batteries. how long(hours)could it run if all 10

199. Math- Really need help!

A consumer at a bread factory would like to know if there are differences (gender) in bread preferences. Forty adults were randomly selected and asked the following questions: Which type of bread do you prefer? They were instructed to only pick one bread

200. socials

Canada not with Vietnam war that happen after 1950's and that when Canada start getting independent on own. Defense line happen early years and that when Canada was with U.S. But what were the foreign policies?

201. Physics

What is the vector sum of a 65 N force acting due east and a 32 N force acting due west?

202. trig

A tree casts a shadow 203 feet long. Find the number of feet in the height of the tree knowing that the angle of elevation of the sun is 16 degrees. Give your answer to the nearest integer. a. 57 b. 56 c. 61 d. 58 e. 55

203. socials

UN which was United Nations was to keep peace, but how it not work? It not tell us that.

204. Physics

A crate of mass 0.812 kg is placed on a rough incline of angle 35.3 degrees. Near the base of the incline is a spring of spring constant 1140 N/m. The mass is pressed against the spring a distance x and released. It moves up the slope 0.154 meters from the

205. Physics

A bucket of mass M = 5.47 kg is attached to a second bucket of mass m = 3:52 kg by an ideal string. The string is hung over an ideal pulley as shown in the gure. Mass M is started with an initial downward speed of 2.13 m/s. What then is the speed (m/s) of

206. chemistry

The vapor pressures of several solutions of water-propanol(Ch3Ch2Ch2OH) were determined at various compositions, with thefollowing data collected at 45C: XH2O Vapor pressure (torr) 0 74.0 .15 77.3 .37 80.2 .54 81.6 .69 80.6 .83 78.2 1.00 71.9 a.) Are

207. english

In our courts of law, 12 members of a jury (decides,decide) a defendant's gulilt or innocence.

208. Chemistry

A 1.42-g sample of a pure compound, with formula M2SO4, was dissolved in water and treated with an excess of aqueous calcium chloride, resulting in the precipitation of all the sulphate ions as calcium sulphate. The precipitate was collected, dried, and

209. Algebra

The cost, in millions, to remove x% of pollution in a pond is modeled by the equation: . What is the cost to remove 75% of the pollution? Hint: Plug in and calculate, do not convert to a decimal. what value of x would make the equation undefined? Hint:

210. Math

Problem solving Marie takes 22cent from her coin bank.Now she has 49cent left .how much did she start with?

211. Algebra

HELP!!!!!!!If 59 people use 15,045 cans in 1 year. How maNY CANS are used in a city with a population of 1,562,000???

212. algebra

a sample of 144 firecrackers contained 8 duds how many duds would you expect in a sample of 2016 firecracker.

213. Trigonometry

In the right triangle below, a = 53 cm, b = 45 cm and c = 28 cm. Find sec(θ) .

214. algebra

10cm2 of a normal specimen of human blood contains 1.2g og hemoglobin how many grams does 47cm3 of the same blood contain

215. math

In the right triangle below, a = 53 cm, b = 45 cm and c = 28 cm. Find sec(θ) .

216. I am really in need of someone help! Please

A researcher has collected statistics pretest scores for students representing 3 different age groups 18-30 31-45 45 and up 3 5 10 7 10 2 9 9 8 6 8 8 4 6 5 Do hypothesis test using ANOVA to find if significant difference. Use alpha .05. All hypothesis

217. calculus

what is the domain of f if f(x)=2cos(4x+pie)-1

218. English

In a slang expression, what is the use of 'chilling'? 1. play with friends 2. hang out (with friends) 3. cool, excellent Which one is right?

219. Physics

True or False: If no friction forces are present the work done by a force on an object increases either its kinetic energy or its potential energy.

220. history- civil war

What did Abraham Lincoln mean by saying slaves represented money? He meant that without the slaves the South would have no income. The more slaves they had, the more income. Please check if this is correct. Thanks.

221. math

mr.diaz measured the length of the garden.It measured 9 meters long.How many centimeters long was the garden.

222. Study unit main ideas

Which one of the following passages best suggest an indirect cause?

223. math

Tim works at a hardware store has 8 1/2 pounds of nails to be sorted into bags. How many bags will Tim be able to fill if he puts 1/4 pounds of nails into each bag?

231. Physics

True or False: If a cannon fires a cannonball in an easterly direction, the tendency of the cannon to move to the west is a result of the principle of conservation of energy.

232. math

What is the length of this piece of string measured to the nearest 1/4 inch.

252. algebra

the speed of a passenger train is 20mph faster than the speed of a freight train. the passenger train travels 300 miles in the same time it takes the freight train to travel 200miles find the speed of each train.

253. Gov

Who is sometimes viewed as 2nd powerful federal official after the president?

260. Geometric Proofs

Given: line AB is congruent to line AC, Angle BAD is congruent to angle CAD. Prove: line AD bisects BC Picture: An upside down triangle divided inhalf to form two triangles Angle BAD and angle CAD. They share a common side of AD. and point D bisects line

asked by Tengo anos Cuarenta y uno
261. Intermediate algebra

The number of trout in America, since 1970, is given by the following: y = x2 + 3x + 2 Where x is the number of years and y is the number of trout in the millions. What is the number of trout in the years 1975, 1980, and 1985? Describe the trend of the

which of the following is made of many cells that work together? a. bacteria b. virus c. insect d. amoeba

263. College Algebra

A carpenter is cutting a 3ft by 4ft elliptical sign from a 3ft by 4ft piece of plywood. The ellipse will be drawn using a string attached to the board at the foci of the ellipse. A)How far from the ends of the board should the string be attached? B)How

264. math

A rectangular garden has a length of 5 units and a perimeter of 16 units . A. Draw a diagram of the garden . B. Find the width of the garden . C. Find the area of the garden .

Y+3/2Y-5=6/7

266. Math

a 10 question multiple choice test has 4 possible answer for each question. A student selects at least 6 correct answers. Find probability of this event: (multiple choice) A) .118 B) .995 C) .068 D) .571

267. Math

Find the accumulated value of quarterly deposits of three hundred dollars each immediately after the 32 deposit If the deposits earn 10% quarterly for the first five years and 12% for the last three years.

269. com156

Quoting, Summarizing, and Paraphrasing a Source Part 1: Summarizing Review the following passage and summarize it in the box as though you were including this information in a research paper. Use the reference to create an appropriate APA-formatted,

270. Physics

The Near Earth Asteroid Rendezvous (NEAR), after traveling 2.1 billion km, is meant to orbit the asteroid Eros at a height of about 15 km from the asteroid's center. Eros is roughly box-shaped, with dimensions 40 km 6 km 6 km. Assume Eros has a density

271. algebra

a long distance trucker traveled 64miles in one direction during a snow strom. the return trip in rainy weather was accomplished at double the speed and took 2 hours less time. find the speed going.

4x+y