# Questions Asked onMarch 9, 2011

1. ## physic

A car is driven east for a distance of 44 km, then north for 25 km, and then in a direction 27° east of north for 28 km. Determine (a) the magnitude (in km) of the car's total displacement from its starting point and (b) the angle (from east) of the car's

asked by keef lam
2. ## PHYSICS

The hydraulic gradient in an 10-ft-thick aquifer at a site of uniform flow prior to pumping is -0.02. The hydraulic conductivity is 100 ft/day. True or False: After pumping starts at a well at a rate of 10,000 cubic feet per day, the distance from the well

3. ## Calculus AB

Consider the region trapped between the graphs of y=9-x^2 and y=11-3x. a) find the area of this region b) set up an integral which computes the volume of the solid of rotation obtained by rotating this region about the x-axis c) set up an integral which

4. ## statistics

Let X be the average of a sample of 16 independent normal random variables with mean 0 and variance 1. Determine c such that P (X< c) = .5

5. ## math

The ratio of dimes to nickels in jan's change box is 2/3. jan has 75 cents in nickles. how many nickes does jan have? 15? would that be correct? and would she have 10 dimes?

6. ## math

how do i solve this S(1)=10000(1-e^-.5(1)) the answer for this is 3935 buy i don't know how it came up with that answer. could anyone please explain to me how thanks in advance!

7. ## Logarithms

I'm working on logarithmic equations and I'm stuck on how my book arrives at the next step. First, they use the change of base formula on, log(sqrt(2))(x^3 - 2) (sqrt(2)) is the base,changing to base 2 log(sqrt(2))(x^3 - 2)= log2(x^3 - 2)/(log2(sqrt(2)) I

8. ## math

Turn 7 21 into a percent and decimal. First simplify the fraction. Show your answer on the number line.

9. ## math

Your Porsche's gas mileage (in miles per gallon) is given as a function M(x) of speed x in miles per hour. It is found that M'(x) = 3,600x−2 − 1 (3,600x−1 + x)2 . Estimate M'(10), M'(60), and M'(110). (Round your answers to seven decimal places.)

10. ## english

Do all essays require a thesis

11. ## Math

Can someone please simplify this i am lost. X(x+1)+(x+1)(x+2) show your work

asked by Tshepiso mphehlo
12. ## Geography

what is an Icelandic home's average room temperature?

13. ## Calculus

Could someone please explain this to me? Differentiate. h(u)= 10^(sqrt(u)) h'(u)= 10^(sqrt(u))*log(10)(d/du(sqrt(u))) h'(u)= 10^(sqrt(u))*((1)/(2*sqrt(u)))*log(10)

14. ## calc

f'(x)=(24)/((2sinx+6cosx)^2) find equation of line y=mx+b

15. ## statistics

Describe the major difference between a population of scores with a mean=50, standard deviation=6, and a sample means of n=36 selected from a mean=50, standard deviation=6.

16. ## english

is there such thing as "exercising of oversight on" ....

17. ## PHYSICS

A plank of uniform construction 5 metres in length and of mass 25kg. is balanced on a sawhorse stand which acts as a fulcrum. a bag of sand having a mass of 20kg. is suspended from one end of the plank. on the other end of the plank, a concrete block of

A box is lifted with a pry bar, by slipping the bar under the box and lifting up on the bar. If the pry bar is 2m in length and it is grasped at the end, and the box is located at the opposite end, the fulcrum, with its center of gravity at a distance of

19. ## Chemistry

what is the numerical value of the equilibrium constant Kgoal for the reaction CO2(g) C(s) +O2(g)? by making use of the following information: 1. 2CO2(g)+2H2O(I) = CH3COOH(I)+2O2(g), K1=5.40x10^-16. 2. 2H2(g)+O2(g) = 2H2O(I), K2=1.06x10^10. 3. CH3COOH(I) -

20. ## physics

How much heat is absorbed by an electric refrigerator in charging 2 Kg of water at 15°C to ice at 0°C?

21. ## physics

Determine the resulting temperature when 150g of ice at 0°C is mixed with 300g of water at 50°C

22. ## English

Can you please check these five sentences for me I find it difficult to correct. 1)1984 can be considered (as) an anti-utopian novel because it provides the description of a society in which a totalitarian government controls any action of the people. 2)In

23. ## science

what will it cost to heat 1.5Mg of water from room temperature to 90degrees celcius using electricity at 60% efficiency?

24. ## Physics

On a dry road, a car with good tires may be able to brake with a constant deceleration of 4.17 m/s2. (a) How long does such a car, initially traveling at 22.4 m/s, take to stop? (b) How far does it travel in this time?

25. ## hum/176

In this week's video, Bill Goodykoontz discusses the effects of violence on audiences and gamers. How much responsibility do filmmakers, game manufacturers, etc. bear when it comes to depicting violence? How much responsibility do parents have in allowing

26. ## literary

Give examples of literary and non-literary prose by citing examples from any source of your choice - 350 words (you may quote the source).

27. ## physics

1.A car is traveling a road that includes two sides of an equilateral triangle with a constant speed s. What is the magnitude of the average velocity v of the car? 2.A ship crosses a river aiming at the angle theta to the left from the straight courses.

28. ## college physics

two balls of equal mass,moving with speeds of 5 meter/seconds,collide head on.find the velocity of each after impact if (a)they are stuck together (b)the collision of perfectly elastic. (c)the coefficient of restitution in 1/3?

asked by Jeff Rey
29. ## chemistry

if i want to change the pH of any solution from 5 to 8 what the volume of NaOH 0.1 N needed

30. ## science

what is a traige according to first aid

31. ## physics

1.A car is traveling a road that includes two sides of an equilateral triangle with a constant speed s. What is the magnitude of the average velocity v of the car? 2.A ship crosses a river aiming at the angle theta to the left from the straight courses.

32. ## geometry

A segment 12" long is divided into two segments having lengths in the ratio of 2:3. Find the length of each segment. (Hint: Let 2x and 3x represent the length of the parts.) x = ? segment 1 = (2x) = ? inches segment 2 = (3x) = ? inches

33. ## goemetry

A segment is divided into two parts having lengths in the ratio of 5:3. If the difference between the length of the parts is 6," find the length of each part. x = ? segment 1 = (5x) = ? inches segment 2 = (3x) = ? inches

34. ## Physical science

what is the concentration hcl react with zn

35. ## MATH

The ratio of the distances a 7-iron and a 5-iron will drive a golf ball is 5 to 6. If a golfer averages 153 yards with a 7-iron how far should he average with a 5-iron Express your answer as an integer or mixed number. 183.6 The appliance store where the

36. ## College Math

Use the functions to find the stopping distance on wet pavement and dry pavement for a car traveling at 55 MPH.Identify the graph for each stopping distance.Explain how well your answers to item 1 model the actual stopping distances shown in Figure 3.41 on

37. ## AP Calculus

An object moves along the x-axis with a velocity of v(t) = sin(pi/3)t for time t greater than or equal to 0. What is the total distance traveled by the object over the time interval 0 less than or equal to t less than or equal to 4?

38. ## English

Could you please check the correction of your first sentence? I included a few more sentences on Stevenson's novel. Could you please have a look at them? Thank you. 1 a) 1984 can be considered as anti-utopian novel. 1)The single dominant theme in Dr Jekyll

39. ## AP Physics

Two radioactive isotopes are extracted from spent nuclear fuel and placed in a metal container, which is then sealed and deposited in a nuclear waste disposal facility. The graph above shows how many nuclei of isotopes 1 and 2 remain as a function of time.

40. ## trig

I need to state the period and 2 consecutive asymptotes on the graph for the following questions. 1: y = -3 tan pi*x period: pi (?) asymptotes: ? 2: y = 2 sec 4x period: ? asymptotes: ? 3: y = csc (x/3) period: ? asymptotes: ? 4: y = 3 cot (pi*x/2) period:

41. ## English - Native speakers

Hello! Which expression do you use the most in English? Don't take amiss to me or something similar? I am looking for a verb but I can't seem to find it in English. Is there also an expression like to take harm on someone? I hope you get the idea which

42. ## English

I still have a few doubts. I hope you can have a look at them, too. 1) Winston is a thry-nine-year-old man characterized (?) by blonde hair and a ruddy complexion, caused by the use of blunt razor blades. 2) At the beginning of the book he enters his modes

43. ## English

I forgot to include the following sentences. I hope you can have a look at them, too. 1) 1984 can be considered an anti-utopian novel, which shows Orwell's sympathy for all the people who were murdered and exhiliated in totalitarian dictatorships (?) in

44. ## IV help

What is the drip rate for infusing an IV at a KVO rate using a 60 ttys/mL administration set?

45. ## Calculus

Find the domain: f(x)= x2-7x+12/x4-8x3+13x2+30x-72

46. ## Calculus

Find the derivative of f. you may simplify before differentiating f(x)= x2-7x+12/x4-8x3+13x2+30x-72

47. ## science

How mny moles of Mg would you need to react with 2.5 moles of O2?

48. ## science

what is the mole ratio of C5H12-> C5H8 + 2H2?

49. ## math

Determine whether the graph of each function is symmetric with respect to the origin. F(X)=-12/x

50. ## Physics

Suppose a cube that measures 0.020 m on each side were made of water. Find its volume, mass, and weight.

51. ## Geography/History

Which of the countries listed below receives the most rainfall? A) Somalia B) Namibia C) Democratic Republic of Congo D) Central African Republic I cant find the answer to this anywhere, can someone help?

52. ## general

can we ask personal advice questions on here too? or just homework?

53. ## art

can anyone help with art/101 final

54. ## Geography/History

I'm doing an alternate test on Sub-Saharan Africa, and Africa. I cant find all the answers in the book, and i can't find a good website. Can someone help me find a good website for Sub-Saharan Africa?

55. ## chemistry

How many grams of water should you add to 31.0g of sucrose,C12H22O11, to get a 0.855 m solution?

56. ## gcse geography

please could someone help me find the definition of a sandy beach. ive looked but cant find anything.thanks:-)

57. ## chemistry

What is the vapor pressure (in mm Hg) of a solution of 12.5 g of glucose ( C6H12O6) in 75.0 g of methanol (CH3OH) at 27 degrees celcius? The vapor pressure of pure methanol at 27 degrees celcius is 140 mm Hg.

58. ## Algebra

19/21 divided by 4 6/7 give estimate anser & exact answer

59. ## English

I have a few more sentences on Dorian's death I'd like you to check. Thank you. 1)Dorian throws himself on the sofa and starts thinking of his past. He recognizes he has filled his mind with corruption, committed horrible crimes and has exerted an evil

64. ## chemistry

What is the pH of a solution made by dissolving the 37 g of KOH in 500 mL of water, with no buffer in it?

65. ## Science

AWhen it is time to leave the part, the familhy could only drive at 60 km/h in the mountains. How long would it take them to travl the 270 km to their home? How fast would they need to travel to make the trip in 3h? I want to see how i write the formula

66. ## Calculus A

1. Find the slope m and an equation of the tangent line to the graph of the function f a the point (2, 38) f(x)=9x -2x +6

67. ## Economics

Could you give me two reasons why it is a good idea for the BBC to be funded through advertising. I have already got that it generates a higher amount of revenue. Also could you give me two reasons why it is not a good idea for the BBC to be funded through

68. ## Science

when a kayak races downstreamm, its speed is clocked at 3 m/s. How far does the kayak travel in 35 s? in 1 hour?

69. ## science

Thank you so much, Ms. Sue. Is this correct? A family backpacking at yosemite took 5 hours to climb a mountain trail 7.5 km long. What was the family's average speed? I did it like this. speed=7.5km/5h = 1.5km over h. Is this right? Thank you - why am i so

70. ## Child Care

1. The interaction between a child's biological makeup and the environmental influences that affect his or her development and behavior is called the a) balanced systems approach b) ecological systems theory c) body in the classroom analysis d) me/them

71. ## science

At the speed of 2.5 m/s, how many seconds will it take the kayak to run a 4,500 m course? What is the speed of the kayak inn kilometer per hour? I want to work it on my own, just need help with formula please thanks

72. ## Chemistry

Determine the volume (in mL) of 0.844 M hydrochloric acid (HCl) that must be added to 38.0 mL of 0.650 M sodium hydrogen phosphate (Na2HPO4) to yield a pH of 6.92. Assume the 5% approximation is valid and report your answer to 3 significant figures. Look

73. ## science

Okay, Ms. Sue. I got this and I don't think that it is right. this is the question - I wrote the answer at the bottom. I don't think that its right. speed=4,500km/2.5h*60min/1 h=270,000/2.5=108,000km/h I think that i'm confused. Thanks

74. ## science

Ms. Sue, I want to check an answer ok? A kayak races 100m in 50s. What is its speed? This is my answer speed=100m/50s=2m/s. Thank you

75. ## Math

how many degrees does the hour hand move in 6 hours?

76. ## Visual Basic

How do I display 1/2 as a signle character in a text box?

77. ## science

Thank you. I don't know if this one is right- At the speed of 2.5m/s, how many seconnds will it take the kayak to run a 4,500 m course? what is the speed of the kayak in kilometers per hour? speed= 4,500km/2.5h*60min/1 h =270,000/2.5=108,000km/h Thank you

78. ## Chemistry

A mixture containing CH3OH, HF, CH3F, and H2O, all at an initial partial pressure of 1.04 atm, is allowed to achieve equilibrium according to the equation below. At equilibrium, the partial pressure of H2O is observed to have increased by 0.43 atm.

79. ## Science

I want to thank you for all the help, I just found this sight today. I think that you and the sight are realy COOL!!!!! thanks :-)

80. ## english

I don't understand the book I'm reading. Its called Goodnight Mr Tom. We writing exams on this but I really need help understanding this book. Please help me.

81. ## HELP NOW MATH

4n − 5 = 3n + 2 I know its 6 but i don't know how to solve it.!!!!!!!!@@@23q9

82. ## English

I checked the spelling mistakes and I reworded some of the sentences. Can you please check them and tell me how I can improve them? Thank you. 1)Dorian throws himself on the sofa, and starts thinking of his past. He recognizes he has filled his mind with

83. ## critical thinking

What is one important distinction you could not overlook making when critically evaluating the information provided in these materials about the Boston Tea Party?

84. ## physics

A proton with a speed of 3.5 × 10 6 m/s is shot into a region between two plates that are separated by a distance of 0.23 m. As indicated in the figure, a magnetic field exists between the plates, and it is perpendicular to the velocity of the proton.

85. ## Child Care

1.At what age does exercise begin to result in strength in boys and girls? a)between ages 1 and 2 b)between ages 3 and 4 c)between ages 5 and 6 d)between ages 6 and 7 2.Temperatures in child care education setting should be set at __ in the summer and __

86. ## geometry

How do you find the diagnol length on a 12 ft. by 12 ft. square

87. ## geometry

uvw=xyz if so name the postulate that applies

88. ## Algebra

1) the ideal surface area of a rubber ball shipped from the factory is 50.25 square nches. the company inspector insists that the balls shipped vary no more than .3 square inches of this total. To the nearest hundreth, what is the minimum value for the

89. ## Chemistry

A student titrates 0.100M KOH into 50.00 ml of weak acid HX. The pH of the solution is 4.25 after 20.00 ml of the base has been added, and equivalence point is reached when 40.00 ml of the base is added. 1. What is the concentration of the acid, HX ? 2.

90. ## ALGEBRA II

In circle O, chords AB and CD are congruent. AB measures 2x + y, while CD has a length of 16.5. Two smaller chords, GH and KL, are also congruent. GH measures x + 2y, while KL has a length of 13.5. Find the values of x and y.

91. ## Algebra

which number is not written n scientfc notaton? a)15.5 x 10^4 b)2.567x 10^-5 c)6.7 x 10^3 d) none of these I think D

92. ## Chemistry

X + Y --> Q The reaction above has the rate law: rate = k[X]³. When [X] is doubled the rate increases by a factor of ?

93. ## chem

1.02 mols of helium contain how many atoms?

94. ## English

Thank you for improving my punctuation. Here are some more sentences I'm doubtful about.In particular, I find it difficult to express numbers 7 and 9. 1) However, while looking at the picture, a cry of pain and indignation comes from him. 2) He can see no

95. ## physics Dx

Compute the de Broglie wavelength associated with a ping-pong ball that is moving with a velocity of 4 meters per second. The mass of the ping-pong ball is 20 grams

96. ## Calculus

I am supposed to find when there will be 40 berry bushes. I am given the function p(t)=(16t+50t^3)^1/3. P is the population of a certain type of bush in a conservation area and t is time in years. I know that i am supposed to make p(t) = 40, but i don't

97. ## Economics

Could you give me two reasons why it is a good idea for the BBC to be funded through advertising. I have already got that it generates a higher amount of revenue. Also could you give me two reasons why it is not a good idea for the BBC to be funded through

98. ## Language

Clue Word Not the problem, but the... A_ S _ _ R A boat for pleasure trips Y_ _ _ T

asked by Curly Sue
99. ## physics

a glider of length 10.00 cm slides down an air track. It passes through the lower photogate in .50 sec. A little later it passes through the lower photogate 100.00 cm down the track, in .25 sec. Calculate initial velocity,final velocity, and acceleration.

100. ## Math

On three consecutive passes, a football team gains 8 yards, loses 24 yards, and gains 42 yards. What is the number that rep the total net yardage?

101. ## Chemistry

A. only evaporation occurs, but it eventually stops. B. only condensation occurs, but it eventually stops. C. Neither evaporation nor condensation occurs D. Both evaporation and condensation occur. i think its D, am i right ?

asked by Jazmin F.
102. ## Math

Find the indicated out puts for f(x)=3x squared -5x if f(0)= f(-1)= f(2)=

103. ## Calculus

Find the domain of the following function h(x,y) = sqrt(x-9y+5)?

104. ## history

besides gaining independence for India what is another change that Gandhi occurred because of his actions.

105. ## 3rd Grade Math

How many degrees does the hour hand move in 4 hours?

106. ## Chemistry

which description applies to a system in a sealed flask that is half full of water? (sorry about that) A. only evaporation occurs, but it eventually stops. B. only condensation occurs, but it eventually stops. C. Neither evaporation nor condensation occurs

asked by Jazmin F.
107. ## Calculus

A projectile is launched at an angle of 60 degrees to the horizontal from 6.5 ft above the ground at an initial speed of 150ft/sec. Assume the x-axis is horizontal, the positive y-axis is vertical (opposite g), the ground is horizontal, and only the

108. ## Physics

In the approximation that the Earth is a sphere of uniform density, it can be shown that the gravitational force it exerts on a mass m inside the Earth at a distance r from the center is mg(r/R), where R is the radius of the Earth. (Note that at the the

109. ## Trigonometry

I have some trigonometric equations to do, but I'm pretty lost, and I have to get them done in a timely fashion, so any help would be much appreciated. "Solve the following trig equations. Give all the positive values of the angle between 0 degrees and 360

110. ## math

laura has a roll of ribbon there are 29 yards of ribbon on the roll what equation can laura use to find the number of inches of ribbon on the roll

111. ## Economics - repost - assistance is appreciated

A)Who has more monopoly power---Wal-Mart or the concessionaire who has acquired the franchise to sell beer, hot dogs, colas, candy, etc., at a Washington Redskins football game? Explain. B)Who has more monopsony power---Wal-Mart or teams in the National

112. ## algebra

Simplify the following algebraic expressions: Evaluate; P(-1/2) if P(x)= 2X^4 + X^3 + 12

113. ## Calculus

find the intervals where the function is increasing and the intervals where it is decreasing f(x)= (x^3/3)-(x^2/2) ok i found its derivative which is (f1(x)=(x-1)x my options are increasing a) (0,infinity) b) (-1,0) c(-infinity,0)U(1,infinity) decreasing

114. ## Statistics and Probability

Suppose that the proportion of students who used the Internet as their major resource for school in the past was 66%. A sample of 1000 students was taken and the number of students who used the Internet for their school during the past year was recorded.

115. ## Statistics and Probability

Suppose that the proportion of students who used the Internet as their major resource for school in the past was 66%. A sample of 1000 students was taken and the number of students who used the Internet for their school during the past year was recorded.

116. ## Statistics and Probability

A computer supply house receives a large shipment of blank CDs each week. Past experience has shown that the number of flaws per CD can be described by the following probability distribution, where the random variable X represents the number of flaws per

117. ## Chemistry

If a catalyst is added to a system at equilibrium and the temperature and pressure remain constant there will be no effect on the: (1) rate of the forward reaction (2) rate of the reverse reaction (3) activation energy of the reaction (4) heat of reaction

asked by Jazmin F.
118. ## statistics

A Gallup Poll asked, "In general, how often do you experience stress in your daily life - never, rarely, sometimes, or frequently?" Gallup's report said, "Results are based on telephone interviews with 1,027 national adults, aged 18 and older, conducted

119. ## English

John Donne HOLY SONNETS 10 Death, be not proud, though some have called thee Mighty and dreadful, for thou art not so ; For those, whom thou think'st thou dost overthrow, Die not, poor Death, nor yet canst thou kill me. From rest and sleep, which but thy

120. ## Math

How to simplify this equaiton? -5[55-(14-84)]=? I know that what is in the ( ) comes first so what do I do after -5[55-(-70)] please help me understand this.

121. ## marketing

is the process of naming broad product-markets and then segmenting these broad product-markets in order to select target markets and develop suitable marketing mixes.

122. ## geometria

necesito construir un triangulo de medidas lado A 48 lado B 60 y lado C 75 grados

123. ## Math

Alyssa is a chemist with Gemco Pharmaceutical Company. She needs to prepare 12 ounces of 9% hydrochloric acid solution. The only solution she currently has available are 4% and 12% hydrocholoric acid. How much should she use of each solution to obtain the

124. ## English

I'm finding it dfficult to check a few more sentences. These are the last on this theme. Thank you. 1)He studied at Eton college, where misbehaved students used to be beaten. 2) On his return to London he experienced poverty 3) At the time (not "in this

125. ## physics

A daredevil on a motorcycle leaves the end of a ramp with a speed of 29.5 m/s as in the figure below. If his speed is 27.1 m/s when he reaches the peak of the path, what is the maximum height that he reaches? Ignore friction and air resistance.

126. ## math

How do you simplify equations; ex. 8x+3(-4x+5)2x Caxn someone explain not just post the answer.thanx(:

127. ## physics

A child and sled with a combined mass of 50.0 kg slide down a frictionless slope. If the sled starts from rest and has a speed of 3.40 m/s at the bottom, what is the height of the hill?

128. ## English

I forgot to include these last two sentences. 1) Slaves worked either on sugar cane plantations (better of sugar cane) or in their masters' houses. If they rebelled, they could have an ear cut off or be killed. 2) For them the only way to escap ws the

129. ## Calc.

Differentiate. y= (cos x)^x u= cos x du= -sin x dx ln y = ln(cos x)^x ln y = x ln(cos x) (dy/dx)/(y)= ln(cos x) (dy/dx)= y ln(cos x) = (cos x)^x * (ln cos x) (dx/du)= x(cos x)^(x-1) * (-sin x) = - x sin(x)cos^(x-1)(x) (dy/dx)-(dx/du)=

130. ## physics

i posted this before but no one answered. please help me: A net force of 1.6×10−15 N acts on an electron over a displacement of 5.0 cm, in the same direction as the net force. (a) What is the change in kinetic energy of the electron? (b) If the electron

Which sentence below has an underlined action verb? A. The poem "Easter Wings" is written in the form of wings. ("is" is underlined) B. "Paradise Lost" is an allegory. ("is" is underlined) C. In "Meditation 17," Donne compares man to an island. ("compares"

132. ## physics

A sledge loaded with bricks has a total mass of 18.9 kg and is pulled at constant speed by a rope inclined at 19.3° above the horizontal. The sledge moves a distance of 19.8 m on a horizontal surface. The coefficient of kinetic friction between the sledge

133. ## physics

A ^9 Be nucleus containing four protons and five neutrons has a mass of 1.50×10−26 kg and is traveling vertically upward at 1.70 km/s. If this particle suddenly enters a horizontal magnetic field of 1.25 T pointing from west to east, find the direction

134. ## Math

What is x to the fourth power minus 20x plus 64 equals 0

135. ## Trigonometry

how do you solve for y=sinX+2. just the phase shift and period. even how to graph if anyone knows. i got stuck with this one

136. ## math

a figure on the left is the base of a right solid whose sides are 10 centimeters tall. what is the volume of the solid in cubic centimeters?

137. ## MATH

IN 10 FREE THROWS, PAMELA MADE 3 SHOTS. WHAT IS THE EXPERIMENTAL PROBABILITY THAT PAMELA WILL MAKE HER NEXT FREE THROW?

138. ## Chemistry

In a reversible reaction, chemical equilibrium is attained when ? 1. Rate of the forward reaction is greater than the rate of the reverse reaction. 2. Rate of the reverse reaction is greater than the rate of the forward reaction, 3. Concentration of the

asked by Jazmin F.
139. ## statistics

Many companies today have a mandatory drug testing policy for their employees. To minimize the cost of testing, sample from 6 people are combined. If the mixture tests negative then all 6 individual employees are also negative. Find the probabilty of a

140. ## Pre-Calculus

Completing the Square 1) 9m^2 - 20m - 21 = 0 2) 10x^2 - 4x -32 = 0

141. ## Geometry

"Find the length of the altitude, x, to the nearest hundredth of a meter." The base of the triangle is 14 feet.

142. ## Chemistry-help needed

0.3g of clotrimazole (C22H17ClN2) was dissolved in 80ml of anhydrous acetic acid. This was titrated with 0.1M perchloric acid using 0.3ml of naphtholbenzein as indicator until the colour changes from brownish-yellow to green. 1ml of 0.1M perchloric acid is

143. ## geometry

if a triangle has a perimeter of 72 and a ratio of 3:4:5. what is the length of all three sides and angles

144. ## physics

A ball moving with a speed of 26 m/s strikes an identical ball that is initially at rest. After the collision, the incoming ball has been deviated by 1 = 50° from its original direction, and the struck ball moves off at 2 = 29° from the original

145. ## chemistry

Calculate the volume needed to dissolve 11.2g CuSO4 to prepare 0.140M?

146. ## physics

A ball moving with a speed of 26 m/s strikes an identical ball that is initially at rest. After the collision, the incoming ball has been deviated by angle 1 = 50° from its original direction, and the struck ball moves off at angle 2 = 29° from the

147. ## physic

How much work does gravity do on a 0.0150kg ball falling from a height of 10.0m

148. ## chemistry

How many grams of sodium chloride are needed to prepare 250 mL of a 2% solution?

149. ## basics and tools of floral design

a pick machine affixes a

150. ## Geometry

Find the length of the altitude of an isosceles triangle if one side has a length of 20 ft and a base of 14 ft?

151. ## PreAlgebra

If x=yz, which of the following must be equal to xy? a. yz b. yz^2 c. y^2z d. z^2\y

152. ## math: pre calculus

How do I find the exact value of sec(2.4)?

153. ## chemistry

a weak acid has a pKa of 6.0. what is the ratio of conjugate acid to conjugate base at pH 5?

154. ## algebra

0 cm^3 0f a normal specimen of human blood contains 1.2 g of hemoglobin. how many grams does 45 cm^3 of the same blood contain?

155. ## chemistry

When a solution is diluted with water, the ratio of the initial to final volumes of solution is equal to the ratio of final to initial molarities. true or false?

156. ## Geometry

You are designing dinnerware. What is the length of a side of the smallest square plate on which a 20-cm chopstick can fit along a diagonal without any overhang?

157. ## prealgebra

In the equation A=ur^2, if r is doubled, by what number is A multiplied and why? a. 2 b. 1\2 c. 4 d. 1\4

158. ## URGENT CHEMISTRY

A solution of hydrogen peroxide is 24.26% by mass and has a density of 1.11g/cm^3. the molarity of the solution? 7.54M .273M 8.03M 8.37M none of these

asked by Cotton McKnight

Does anyone know of a good short story that has to due with confidence or dedication? If so do you know the website where i can read the story? Thanks

160. ## Chemistry

consider the equation for the following reaction at equilibrium. X+Y2Z+heat the concentration of the product could be increased by 1.adding a catalyst 2.adding more heat to the system 3.increasing the concentration of Y 4.decreasing the concentration of X

asked by Jazmin F.
161. ## Math

Have to explain how to use a graph to determine the number of solutions system. Am lost on what they want.

162. ## English

Can you please check my last sentences. I really need to know which expressions are best. Thank you. 1)He studied at Eton college, where misbehaved students used to be beaten. 2) On his return to London he experienced poverty. 3) At the time (not "in this

163. ## Science

How did people shape the Earth? Please answer thanks

164. ## MATH

Erika spent 5/6 hr on her computer visiting the history channel and the discovery channel websites. She spent 1/5 hr at the history channel website. How many hours did she spend at the discovery channel website? please help I have no idea where to begin

165. ## Physics

I am a little confused about kinetic and potential energy regarding roller coasters. I understand that the first hill has to be the highest to gain the potential energy (PE). I hope someone can help with this example I just made up to help me understand:

166. ## social studies

How do you feel about medical testing on disable people, and prison inmates.

asked by josh howard
167. ## physics

A lumberjack (mass = 98 kg) is standing at rest on one end of a floating log (mass = 270 kg) that is also at rest. The lumberjack runs to the other end of the log, attaining a velocity of +2.9 m/s relative to the shore, and then hops onto an identical

168. ## PHYSICS

How does the magnitude of the electrical force between two charged objects depend on the distance between the charges? I really frustrated right now, and I can't figure out the answer too this question. Help pleeease :)

169. ## Social Studies Paper

I have to write a paper about my neighborhood (east flat rock NC) using 3 of the 5 themes of geography. The 3 that I used were: Place, Location, and Human-Environment Interaction. I need some help on some ideas I could use for human-environment

Discuss the pros and cons of imposing quotas on some imported goods. How would this affect the American economy?

171. ## Geography

What's the importance of the Mississippi River? Thanks in advance

172. ## biology

Which of these characteristics is NOT found in the amphibians?

173. ## Grammar

My aunt works at Woods Hole as a scientist. What are the nouns in the sentence? Is is aunt, Woods hole and scientist?

174. ## chem

...A dioxin-contaminated water source contains 0.044% dioxin by mass. How much dioxin is present in 6.5 L of this water? (Assume that the density of the solution is 1.00 g/mL.) thanks

175. ## Biology

We extract energy from macronutrients primarily from which of the following types of chemical reactions?

212. ## spanish

. Hay una variedad de las bebidas y los postres deliciosos también My teacher marked that sentence down, and according to her there is suppose to be a verb between postres and deliciosos, which i am having trouble figuring out. Can any one help?

213. ## trig

solve each equation for 0 less than or equal to x greater than 2ð. cot²x-cscx=1 thanks:) step by step please :)

214. ## prealgebra

The length of a rectangle is 7cm greater than the width. Find the length and the width if the perimeter is 54cm

215. ## math

In the square if part A is 1/4 of the square and part C is 1/10 of the square, what percent of the square is part B?

216. ## alg 1

how do you work out d2+3d-10=0?

asked by andrea hammock
217. ## algebra

The function H described by H(x) = 2.75x + 71.48 can be used to predict the height, in centimeters, of a woman whose humerus (the bone from the elbow to the shoulder) is x cm long.

218. ## Auburn University

Two 95.0 W (120 \rm V) lightbulbs are wired in series, then the combination is connected to a 120 V supply How much power is dissipated by each bulb?

219. ## math

one fifth of my life I wanted to become a teacher. 3/25 of my life I was a teenager. 9/25 of my life I was married to my husband. Three-fifth of my life my son was born. Fifteen years after that, my daughter was born. Seven years after that I got a divorce

220. ## Math

If Alex and Steven are spinning to see who gets to take 711 on a trip. Alex decides to spin himself to make sure Steven doesn't cheat. He spins himself 14 times. They decide if Alex spins a 4 or any number less than 4 he gets to go on a trip with 711. If

asked by A. Plz Answer My Queation I NEED TO GO TO SLEEP
221. ## 5th grade math

How to change 6/8 into a decimal, and into a percent can someone help me please

222. ## physics

The voltage across the terminals of a 8.90 V battery is 8.00 V when the battery is connected to a 50.0 \Omega load.What is the battery's internal resistance?

223. ## Calculus

Find the derivative of (b/(a+z^2))^2 Assuming that a and b are constants...

224. ## math

what is the greater common factor of 6/12 need all divisible numbers for both and put in lowest form as a fraction

225. ## Algebra

an investment of 72,000 was made by a business club. the investment was split into three parts and lasted for one year. the first part of the investment earned 8% interest. the second 6% and the third 9%. total interest from the investments was \$5640. the

226. ## chemistry

how much of a 0.225 M KCl solution contains 55.8g of KCl

227. ## math?

4/11 into a prcnt

228. ## math

I MUST DRAW TWO CARDS WHOSE SUM IS NINE, FROM A STACK OF CARDS NUMBERED ONE THRU TEN. AFTER THE FIRST DRAW, I REPLACED THE CARD AND SHUFFLE THE STACK AGAIN FOR THE SECOND DRAW. WHAT IS THE CHANCE THAT MY TWO CARDS WILL HAVE A SUM OF NINE IF I DREW

229. ## English

Is impacted an action word?

230. ## Liberal Arts Math

what is k(p)= (p+3)(p-7)

231. ## science

how much of a 0.225 M KCl solution contains 55.8g of KCl

232. ## science

how much of a 0.225 M KCl solution contains 55.8g of KCl

233. ## Mathematics .

I need some help with this specific question. In a computer catalog, a computer monitor is listed as being 19 inches. This distance is the diagonal distance across the screen. If the screen measures 10 inches in height, what is the actual width of the

234. ## Chemistry

What is the volume of 0.05-molar HCl that is required to neutralize 50 ml of a 0.10-molar Mg(OH)2 solution?

235. ## math?

9/54 ito percent

236. ## Math

How to change 320% into a decimal and a fraction

237. ## geometry

I have a isosceles trapezoid question. The top line is 13" long, the sides are 60" long, and the bottom is 27" long. I do not know what is the equation or formula is to determine the acute angle between the bottom and sides or top and sides. Can you please

238. ## statistic

Given a normal population with ì = 40 and ó = 8, what is the probability of obtaining a sample mean between 39 and 41 for a sample of n = 16 scores?

239. ## Story about my future Part 2

Down below is the other path I have written about. Could you please check to see if it covers all these factors. - cost of living on your own -factors that add to your achievement in the workplace -educational attainment and earning potential -current

240. ## AP Chem

What is the pH of 0.2 M solution of sodium propanoate?

241. ## science

determine the molar concentration of Ca^2+ and Cl- in a .075 M CaCl2 solution

242. ## Statistics

Recently, a case of food poisoning was traced to a particular restaurant chain. The source was identified and corrective actions were taken to make sure that the food poisoning would not reoccur. Despite the response from the restaurant chain, many

243. ## Chemistry

What is the boiling point of a solution made by mixing 115 g NaCl in 1 kg of water? (Kb for water is 0.512 C/m)

244. ## Science

Determine the molar concentration of Ca^2+ and Cl- in a .075 M CaCl2 solution

245. ## calculus

how can I determine the domain of a function h(x): integrate from 0 to 2x-1 f(t)dt, when the f(x) function is a graph shown and equations for both semicircles in the graph are: square root of 4x-x(squared) and for the second one -square

246. ## English

I'm writing an easy about my hero. I need s strong into sentence with a a action work. So carving have "Taylor swift has impacted my life..''

247. ## physics

safiya places a 5.o-kilogram brick on chair in the classroom.the chair is 1.o meter off the ground.what is the gravitation potential of the brick if it falls off the chair?remember that gravity equals 9.8 meter per second squared.

248. ## math

Please help my equivalent fraction. I am greater than 1/5 and less than 1/2. My denominator is between 2 and 4. What fraction am I? Thanks for the help..

249. ## FRENCH

Okay so for this question Qu'est-ce que tu viens de faire aujourd'hui? Je viens de parler au Francais. D'après toi, est-ce qu'il faut être content(e)? Oui, d'après moi, il faut être riche pour être content. Est-ce que tu as une amie qui est souvent en

250. ## MATH

-9 is a member of which subset of real numbers

251. ## math

my son has to draw a figure with an area of 63 and a perimeter of 32.how do he go about doing it?

252. ## math

a college conducted a survey and determined that 68% of the students attending the college owned a car.what is the ratio of the number of students who own cars to total numbers of students

253. ## lang

What is preposition phrase in the follow sentence: When you are seasick, you are not really sick from the sea.

254. ## math

what would 120/18 reduce to? 6 1/3

255. ## HCA 220

I am in week 4 and need guidance on where to begin my power point presentation. I have only did one other power point and it was nothing like this. I am completely at a loss. I just need an example of what to do as this seems way over my head. Help! Gem

256. ## Chemistry

When 100mL of 1.00 M Ba (NO3)2 and 100 mL of 1.00 M Na2SO4, both at 25 degrees celsius, are mixed in a constant pressure calorimeter, a white precipitate is formed and the temperature rises to 28.1 degrees celsius. A. What is the precipitate? B. If all of

257. ## ETH 125

I'm reviewing the current issues between the federal government and the Native Americans for a CheckPoint Assignment in week 6. My question; when reviewing the article, on the Indian Country website, how do I decipher which legislation is linked to the

258. ## chemistry

What mass of melamine, C3N3(NH2)3, will be obtained from 159.5 kg of urea, CO(NH2)2, if the yield of the overall reaction is 79.0 %?

259. ## Alg 1

A farmer has 165 feet of fencing material in which to emclose a rectangle area. He wants the length x to be greater than 50 feet and width y to be no more than 20 feet. write a system to represent this situation.

260. ## Physics 1

A meter stick has a mass of 200g and its center of gravity is at the 50.0 cm mark. If 150g is attached to the stick at the 10 cm mark, where would an upward force on the stick need to be placed to balance the stick and the added mass?

261. ## Calculus

Find the derivative of y=cos^6w+cos(w^6) The answer I have is -6(cosw^5sinw+wsin(w^6)) but it's not right...

262. ## Alg 1

The popultion of Medford High is 800 students & the population of WEstville High is 1240 students. Medfords pop. has been increasing by 30 students per year, while westville has been decreasing by 25 students per year. In how many yearas will the

263. ## Chemistry

Why is potassium hydrogen phthalate (KHP) a primary standard but sodium hydroxide is not?

264. ## math

In an 8 inch square cake pan and a 10 inch square cake pan. what is the difference in volume each pan will hold. each pan is 1.5 inches high

265. ## Chemistry

A 25.0cm^3 aliquot of a solution containing Fe2+ ions and Fe3+ ions was acidified and titrated against KMnO4 solution. 15.0cm^3 of 0.020M KMnO4 was needed. A second 25.0cm^3 aliquot was reduced using Zn, then titrated. This time, 19.0cm^3 of the 0.020M

266. ## chemistry

I am not understanding this molarity stuff. Can someone please show me step by step on how to solve this question? What is the molarity of 0.50 L of solution containing 40.0 g of CaCO3?

267. ## Math- Algebra II

SOLVE.. Please show the steps so I'll understand it 8^x-2=(1/16)

268. ## chemistry

I don't understand this zwitterion form . Here is the question. write the zwitterion form of the amino acid cysteins shown in the follwing figure. If the pI for cysteine is 5.1 at what pH will the zwitterions be the predominant form? Can you please show me

269. ## English

Please check for any errors. Let me know if i need to place commas anywhere or delete. Attached are the Widget Sales figures for the past six months. My principle concern is the lack of effectiveness of the sales manager in the Southwest Division. The

270. ## Calculus

Find the derivative of f(x)=sqrt(9−sinx/1−cosx) Everthing is included in the square root...

271. ## science

need to unscramble these letters to make a four word message using this pattern xxxxx xxx xxx xxx letters are teeuobftrdhsye or teeuobflrdhsye please help

272. ## French

How would you say Ash Wednesday and Easter in French? My French teacher said it today, but I just can't recall what it was now...