# Questions Asked onSeptember 6, 2010

1. ## Chemistry

A 2.52g sample of a compound containing only carbon, hydrogen, nitrogen, oxygen, and sulfur was burned in excess O to yield 4.36g of CO2 and 0.892g of H20. Another sample of the same compound of mass 4.14g, yielded g of SO3. A third sample, of mass, 5.66g,

2. ## physics

a kicker kicks a football from the 5 yard line to the 45 yd line ( on the same half of the field). Ignoring air resistance, where along the trajectory is the speed of the football a minimum. what formuls is used and show work a) at the 5 yd line, just

3. ## Physics

A record for a marathon is 2.00h, 9.00min, 21.0 sec. If the average speed of a runner achieving this record is 5.436 m/s, what is the marathon distance? Answers: 15,878 km 7,761 km 42.2 km 26.2 km We're omnly two days into the new school year and I don't

4. ## geometry

line JK bisects LM at point J. Find JM if LJ=23 centimeters.

Simplify each expression. Assume all variables are positive. 1) 3 sqrt2 - 8 sqrt128 I think you subtract the 3 from the 8 but I do not know what else to do. 2) Simplify expression. Answer should have only positive exponents. (8x^3 y^-1/2)^2/15 Do I

6. ## math

Andrew earns \$2 more than Barbara, who earned \$30 more last week than Andrew. All amounts earned were at straight time. This is a number cross word puzzle mind bender homework problem. ? Andrews hourly rate and Barbara's hourly rate

7. ## chemistry

write the net ionic equation for the following : 2CuCl(aq)-> CuCl2(aq)+ Cu(s) 4NaCl(aq)+2H2SO4(aq)+MnO2(s)-> 2Na2SO4(aq)+2H2O(l)+Cl2(g) 3KOH(aq)+Fe(NO3)3(aq)->Fe(OH)3(s)+ 3KNO3(aq)

8. ## math

A cone of height 24cm has a curved surface area 550 cm2 . Find its volume.

9. ## chemistry

A flask has a mass of 78.23 g when empty and 593.63 g when filled with water. When the same flask is filled with concentrated sulfuric acid, H2SO4, its mass is 1026.57 g. What is the density of concentrated sulfuric acid? (Assume water has a density of

10. ## STATISTICS

PERFORM THE INDICATED CALCULATIONS 5P2/12P4

11. ## Calculus

Solve for x if 5+lnx=14/lnx.

12. ## Math - Equations of plane(check)

Consider the plane that contains points A(2,3,1), B(-11,1,2), C(-7,-3,-6). a) Find two vectors that are parallel to the plane. Ans: AC, BC or AB will be parallel to the plane. b) Find two vectors that are perpendicular to the plane. Ans: if i find the

13. ## algebra

3 times the difference of 7 and d

14. ## Algebra 2

The measures of an angle and its complement differ by 22 degrees. What are the measures of the angles?

15. ## Chemistry

1. You have gone back in time and are working with Dalton on a table of relative masses. Following are his data: 0.602g gas A reacts with 0.295g gas B 0.172g gas B reacts with 0.401g gas C 0.320g gas A reacts with 0.374g gas C a) Assuming simplest formulas

16. ## Organic Chemistry

Why does the loss of a proton from cyanic acid yield the same anion as that obtained by the loss of a proton from isocyanic acid?

17. ## Physics

Vector A is directed along the positive y-axis and has a magnitude of sqrt 3.0 units. Vector B is directed along the negative x-axis and has magnitude 1.0 units. What are the magnitude and direction of A + B?

18. ## physics

A flask has a mass of 78.23 g when empty and 593.63 g when filled with water. When the same flask is filled with concentrated sulfuric acid, H2SO4, its mass is 1026.57 g. What is the density of concentrated sulfuric acid? (Assume water has a density of

19. ## physics

A model rocket is launched straight upward with an initial speed of 60.0 m/s. It accelerates with a constant upward acceleration of 2.00 m/s2 until its engines stop at an altitude of 130 m. (a) What is the maximum height reached by the rocket? m (b) How

20. ## Math - intersection of planes

You are given the following two planes: x+4y-3z-12=0 x+6y-2z-22=0 a) Determine if the planes are parallel b) Fine the line of intersection of the two

21. ## geometry+algebra

If AD = 20 and AC = 3x + 4, find the value of x. Then find AC and DC

22. ## Geometry

Suppose J is between H and K. Use the Segment Addition Postulate to solve or x. Then find the length of each segment. HJ= 2x+1/3 JK= 5x+2/3 KH= 12x-4

23. ## Astronomy

Venus orbits 0.72 AU from the sun. What is that distance in kilometers?

24. ## Physics II

A man weighs 0.80 kN on Earth. What is his mass in kilograms?

25. ## Algebra II/ Pre Calc

ln(12+x)= It is not (ln 12)(ln x) or (ln12x)

26. ## Math

Use your protractor to find the measure of the angle to the nearest degree. 1.Angle S Anyone know how am I suppose to find the degree when it only telling me the vertex(S) ?

27. ## poetry

What is the Cause and Effect of the Poem Lineage by Margaret Walker?

28. ## Physics

A plane drops a hamper of medical supplies from a height of 5210 m during a practice run over the ocean. The plane’s horizontal velocity was 133 m/s at the instant the hamper was dropped. The acceleration of gravity is 9.8 m/s^2. What is the magnitude of

29. ## science

The following statement is a vaild scientific theory. If Watson and Crick had not discovered the structure of DNA, bio - technology would be 20 years behind where it is today. TRUE FALSE true

30. ## chemistry

Which of the following are solutions? Choose all that apply. (Note: do not pick heterogeneous systems that contain a homogeneous phase.) - Cold coffee or cold tea. -Cigarette smoke. - Tap water. - Milk. - Fog. - The air typically found in a room. - Pure

31. ## physics

Consider a rock that is thrown off a bridge of height 27 m at an angle θ = 24° with respect to the horizontal as shown in the figure above. If the initial speed the rock is thrown is 12 m/s, find the following quantities: (a) The time it takes the rock

32. ## Math

The sum of Billy's and his sister Diane ages is 37. If three years ago Billy was 11 years older than Diane, then what is the age of each of them right now?

33. ## physics

A foam cube bounces to a height of 15cm when dropped from a height of 100cm. To what height will it bounce if dropped from a height of 2.5cm? How do

34. ## u.s. history

what body has the power to accept or reject a president's nominations to the supreme court?

35. ## English Literature

Question: Explain why Beowulf is an epic poem and why Beowulf is an epic hero This is what i have: Beowulf is a national epic or a long narrative poem. It involves a hero, Beowulf, who is larger than life. The poem concerns eternal serious human problems.

36. ## health

as you grow up stress in your live is sometimes caused by ?

37. ## Math

Simplify each expression (-216)^1/3 My answer is 1/6. Am I correct. (x^4y)^1/3 (xy^4)^2/3 I do not know how to simplify this.

38. ## college physical science

how much would a 80.0kg person weigh on mars if the acceleration of gravity is 3.93m/s2

39. ## physics

A quarterback is asked to throw a football to a receiver that is 32.1 m away. What is the minimum speed that the football must have when it leaves the quarterback's hand? Ignore air resistance. Assume the ball is caught at the same height as it is thrown.

40. ## science

WHAT IS AN INFERENCE? a) what is really occurring b) a conclusion that has been tested and accepted c) an observation made with a sense other than sight d) a tentative conclusion based on observation just need to know if right or wrong C

41. ## scinence

Minska has a problem. When she turns on a lamp, the lamp doesn't light. She wonders if the lamp is plugged into the outlet. She checks the outlet and discovers that it is plugged in. After Minska concludes that her explanation didn't fit the evidence, what

42. ## physics

The force exerted by the wind on the sails of a sailboat is 370 N north. The water exerts a force of 210 N east. If the boat (including its crew) has a mass of 270 kg, what are the magnitude and direction of its acceleration?

43. ## chemistry

What weight of sodium nitrate (NaNO3) must be used to prepare 511mL of a 10.8Msolution of this salt in water?

44. ## chemistry

An unknown quantity of gas at a pressure of 121.59 kPa, a volume of 31 L, and a temperature of 360 K contains how many moles of gas? Round to the nearest hundredth. Don't forget the units.

45. ## civics

why did our founding fathers choose democracy over the other governments?

46. ## physics

A model rocket is launched straight upward with an initial speed of 60.0 m/s. It accelerates with a constant upward acceleration of 2.00 m/s2 until its engines stop at an altitude of 130 m. (a) What is the maximum height reached by the rocket? Your

47. ## chemistry

iron 3 oxide reacts with carbon monoxide according to the following equation: fe2O3+3Co-->2Fe+3Co2 a) how many moles of ions are produced when one mole of iron 3 oxide reacts b) calculate the volume of carbondioxide produced when one mole of iron 3

48. ## anat. & phys.

draw & label all tissue/organs of endocrine sys. during stres response

49. ## physics

The 45-45-90 triangular prism shown in the figure has an index of refraction of 1.44, and is surrounded by air. A ray of light is incident on the left face at an angle of 46.0°. The point of incidence is high enough that the refracted ray hits the

50. ## English

In the book, Pride and Prejudice,does Elizabeth marry Mr. Darcy in the end?

51. ## physics

A round ball bounces to 2m after being dropped from an undetermined height. To what height will it bounce if dropped from a height 2.5 times as high? (how do u even calculate this problem?). (or is it just a problem that cant be solved?)

52. ## Physics

a plane has an airspeed of 200 mph. the pilot wants to reach a destination 600 miles east but a wind is blowing 50 mph 30 degrees North of East. What direction must the pilot head the plane in order to reach the destination? I asked my Lab T.A. and she

53. ## English Literature

Explain why beowulf is an epic poem and why beowulf is an epic hero.

54. ## English

1. Degas painted in his studio, and he was based on the sketches. 2. Degas painted in his studio, and he was based on the sketches. 3. Degas painted in his studio, and his paintings were based on the sketches. 4. Degas painted in his studio, his paintings

graph y=x+4

56. ## Math

Evaluate the logarithmic equation for three values of x that are greater than 1, three values of x that are between 0 and 1, and at x=1. Show your work. Use the resulting ordered pairs to plot the graph. State the equation of the line asymptotic to the

57. ## intermediate algebra

Evaluate the logarithmic equation for three values of x that are greater than 1, three values of x that are between 0 and 1, and at x=1. show your work. use the resulting ordered pairs to plot the graph. State the equation of the line asymptotic to the

58. ## chemistry

Help with Beer's Law lab experiment question! So we were told to calculate the concentration of 5 standard solutions but I don't know how to do that exactly. The Concentration of the solution in flask B was .0024 M and our lambda max (max absorption) was

59. ## science

Minska has a problem. When she turns on a lamp, the lamp doesn't light. She wonders if the lamp is plugged into the outlet. She checks the outlet and discovers that it is plugged in. Which stage of the scientific method is Minska in when she looks at the

60. ## math

How do I calcualte these conversions? 8.4cm = m 1333.8g=kg 119cm=mm 2391mL=L 3.22Mm=km 4.68fs=ps 8.86*10^11=Gm 1.57*10^-10m=picometers 381cm=in 94mm=in 5.0L=q 132kg=lbs

61. ## English Literature

This is the question:Disucuss three examples of the anglo-saxon belief in fate as shown in Beowulf. This is what i have The anglo saxons believe that fate is the grim view of life. You have no comtrol over life or destiny. Fate is the source that

62. ## Finance

9. The variable (A) in the utility formula represents the: a. investor’s return requirement. b. investor’s aversion to risk. c. certainty equivalent rate of the portfolio. d. preference for one unit of return per four units of risk.

Simplify each expression. 1)(sqrt7 + 5)(sqrt7 -6) My answer is sqrt 7 - 30 Am I correct?

64. ## chemistry

The density of air is 1.25 gram per liter determine the volume percentage of oxygen in the air at 1 atmospheric pressure and 27 degree celcius temprature? Assume air is a mixture of nitrogen and oxygen.

8-|1-y|=7

66. ## Math

If the wind is blowing from the west at 17 knots, what is its speed in miles per hour? In kilometers per hour?

67. ## science

Minska has a problem. When she turns on a lamp, the lamp doesn't light. She wonders if the lamp is plugged into the outlet. She checks the outlet and discovers that it is plugged in. Which stage of the scientific method is Minska in when she looks at the

68. ## Science/Math

If the temperature of a room is 70 degrees F, what is the temperature of the room in Celsius? In Kelvin?

69. ## science

Marlene's car won't start. She wonders if she is out of gas. She checks the gas gauge and sees that the car has gas. Then she wonders if the battery is dead. She checks the battery and discovers that it is dead. Marlene conclude that her car battery is

70. ## Chemistry

Phosphate standards used to generate the calibration curve are usually made by first preparing a stock solution of known concentration, then diluting it to the required concentration. First prepare a stock solution that is 1.00 x 10-2 M in phosphate ion.

71. ## chemistry

Which of the following properties is a chemical property of phosphorus? Answer a) it burns in air b) it is a white waxy solid c) it melts to form a viscous liquid at 44.1 oC d) Both a and c are both examples of chemical properties. e) a, b, and c are

72. ## System of equation

solve system of equations graphically and check 2x - y = 5 3x + 2y = 4

73. ## equation

solve graphically. x^2 + y^2 = 10 y = 3x

74. ## physics

A rocket is fired vertically up from the ground with a resultant vertical acceleration of (a) what is the maximum height reached? (b) After how much time from then will the maximum height be reached?(take g=10m/s2

75. ## algebra

When the quotient of a certain number and 6 is decreased by 14, the result is 4 find the number.

76. ## English III

I need help don't know how to get this information and not understanding it. The Old Man and the Sea and note five paragraphs in which images occur

77. ## Mayans and aztecs

Where can I find iinformation about the similarities and differences of the culture and life of the Mayans and Aztecs?

78. ## algebra

Solve algebraically and check x^2 + 4y^2 = 4 x = 2y - 2

79. ## Calculus

If f is a polynomial function of degree 3 with the numbers 4,5, and -6 as zeros, and if f(1)=-210, determine the formula for f(x).

80. ## equation

Solve algebraically and check y = x^2 - 3 x + y = -1

81. ## Calculus

A rational function g has the lines x=2 and x=-2 as vertical asymptotes, the line y=4 as a horizontal asymptote, and numbers 3 and 1 as zeros. Find a formula for g(x).

82. ## calculus

PLEASE write 2x+y=5 in polar form. a. -sqrt5 = r cos (theta -27degrees) b. sqrt5 = r cos (theta -27degrees) c. -sqrt5 = r cos (theta +27degrees) d. sqrt5 = r cos (theta +27degrees) is the answer c.

83. ## Physics

Sanding block weighs 2.0 N and is pushed with a force of 3.0 N at an angle of 30.0 degrees with respect to the vertical, and angled toward the wall. Moves straight up the wall at a constant speed. What is the coefficient of kinetic friction between the

84. ## statistics

the amount of time spent in North American adults watching television per day is normal distributed with a mean of 6 hours and a standard deviation of 1.5 hours

85. ## college physical science

how much would a 80.0kg person weigh on earth where the acceleration of gravity is 1.63m/s2

86. ## math

find D from the formula C= pie D WHEN pie= 3.142 and c= 27

87. ## Chemistry

A reastion consumes 5.0g of A and 6.0g of B. How many grams of C and D should be obtained? 1A + 3B -> 2C + 4D MC answers: 23 11 1 10 Not enough information to answer the question

88. ## College English

I have been pouring over this all day and would appreciate if someone could look this over for me with some good news... am I getting it? Gracias! >> represents my chosen answer. 1. Having studied small engine repair in night school, fixing the lawn mower

89. ## Chemistry

A reastion consumes 5.0g of A and 6.0g of B. How many grams of C and D should be obtained? 1A + 3B -> 2C + 4D MC answers: 23 11 1 10 Not enough information to answer the question

90. ## physics

A quarterback is asked to throw a football to a receiver that is 32.1 m away. What is the minimum speed that the football must have when it leaves the quarterback's hand?

91. ## english

could i get this paragraph edited it is a biography in the form of a speech Good morning everyone, we have a special guest here today his name is James lore. Before he comes on, I will tell you a little about him. First off, James is a grade 12 student

92. ## physics

A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 6.6 m/s relative to the ground. When the train moves at a constant velocity, the raindrops make an angle of θ = 36° when they move past

93. ## science

Virginia hears a scratching sound outside her window almost every night. She finds that no tree branches can reach the window even in the strongest wind. What should she do next to solve this problem using the scientific method? a) do another experiment b)

94. ## writing

So I read books 12-16 of The Annals by Tactius and haven't yet finished the Civil War by Lucan. But after reading these two we are suppose to come up with a thesis statement to write a paper about literature in the time of Nero. This is only a rough draft

95. ## computing

if you can answer these question and give the calculation that would be a great help thank you 1. Calculate the amount of storage required for a black and white bit-mapped graphic which has a resolution of 2000 x 1400 dpi. 2. calculate the amount of

96. ## Chemistry

A student adds 4.00g dry ice(Co2(s)) to an empty balloon after the dry ice sublimes and comes to STP?

97. ## physics

a rock is thrown horizontally with a speed of 17 m/s from a vertical cliff of height 34 m. A- I solved for t=2.63 B-How far will it land from the base of the cliff? im using x=xo+vox*t i get -6.46 and it is wrong. What am I doing wrong? C-What is the

98. ## accounting

How do I make general journal entries from a adjusted trial balance?

99. ## Physics

A particle moves in the xy plane with constant acceleration. At time zero, the particle is at x = 4.5 m, y = 6.5 m, and has velocity v(naught) = (6.5 m/s)i-hat + (−2.5 m/s)j-hat (arrow for v(naught) points toward positive x direction). The acceleration

100. ## Physics

I'm shown a graph with position on the y axis and time on the x axis. The question is what is the total displacement during the time interval. The position in (m) starts at 1.0 and goes to 6 and the time starts at 0-10.0 (s). The question is what is the

101. ## social studies

lake superior:north america::lake victoria_____________?

102. ## science

The following statement is a vaild scientific theory. If Watson and Crick had not discovered the structure of DNA, bio - technology would be 20 years behind where it is today. TRUE FALSE true

103. ## algebriacally.

x^2 - y^2 = 9 y = 4

104. ## science

Minska has a problem. When she turns on a lamp, the lamp doesn't light. She wonders if the lamp is plugged into the outlet. She checks the outlet and discovers that it is plugged in. Which stage of the scientific method is Minska in when she looks at the

105. ## Math

Directions: Use each statement as givena and draw a single conclusion using all of the statements. 1) No birds,except ostriches, are nine feet high.There are no birds in this aviary that belong to anyone but me. No ostrich lives on mince pie. I have no

106. ## chemistry

what is the density of 700 ml of a gas that has a mass of 7 g?

107. ## algebra

solve algebraically x^2 + y^2 = 16 x - y = 4

108. ## Math

I need help with this problem. Factoring with Two Variables h^2  9hs + 9s^2

109. ## physics

The speed limit in a school zone is 38 km/h. A driver traveling at this speed sees a child run onto the road 16 m ahead of his car. He applies the brakes, and the car decelerates at a uniform rate of 8.5 m/s2. If the driver's reaction time is 0.55 s, What

110. ## math

solve algebraically x^2 - 2y^2 = 11 y = x + 1

111. ## accounting

What are the qualifications for the FASB board members?

112. ## algebra

world grain demand.freeport mcmoran projectsthat in 2010 world grain supply willbe 1.8trillion metric tonsand the supply will be only3/4 world garin demand. what will world grain demand be 2010

113. ## Calculus (Reiny or MathMate)

A rational function g has the lines x=2 and x=-2 as vertical asymptotes, the line y=4 as a horizontal asymptote, and numbers 3 and 1 as zeros. Find a formula for g(x). So I got g(x)=(4x^2-16x+12)/(x^2-4) Is this correct

114. ## Health

List four ways to keep your health balanced

115. ## Calculus

How do you find the integral (antideriv) of 12 / (7t + 6) ???????? I know that the antideriv of 1/x equals ln x, so is the antideriv of [12 / (7t +6)] = 12 ln (7t +6) ???? THANK YOU SO MUCH!

116. ## Health

Why are all parts of your health equally important

117. ## chemistry

A sample of 7.83 grams of NaOH is dissolved into 620 mL of aqueous 0.250 M NaOH (as- sume no volume change). This solution is then poured into 1.67 gallons of water. (You may assume that the two volumes can be added.) What is the concentration of NaOH in

118. ## chem

If you have an insulated glass of water at 25 oC containing 10 fluid oz at 25 oC, how much ice would you have to add to end up with a final temperature of 0 oC and no ice left?

119. ## chem

If ice were to be placed in a container at a temperature of -2 oC, with a water vapor pressure of 2 torr, you would see a decrease in the volume of solid ice over time.

120. ## physics

How much work does the electric field do in moving a proton from a point with a potential of +120 V to a point where it is -60 V? Express your answer in joules. I've looked through my notes, and I'm sure the answer is really easy, but I'm not seeing it. I

121. ## chem

If this sample of dry ice were to be placed in an evacuated 1.0 L container and allowed to come to room temperature (25 oC), what would the pressure be?

122. ## physics

Vector has a magnitude of 8.80 units and makes an angle of 43.0° counter-clockwise from the positive x-axis. Vector has a magnitude of 8.00 units and is directed along the negative x-axis

123. ## geometry

measure of angle RST=5(x+1)-3

124. ## science

Lilian's car won't start. She is using the scientific method to determone the cause. The car won't jumpstart so the battery is not the casue of the problem. What should she do next? a) run another experiment b) form another hypothesis c) draw another

125. ## Physics

When James applied the brakes to his car, it slows unifromly from 15.0 m/s to 0.0 m/s in 2.50 s. How many meters before a stop sign must she apply her brakes in order to stop at the sign? Answers: 6.0m 37.5 m 18.8 m 48.0m Please help-I've just started

126. ## begining algebra

translate into a variable expression.then simplify the expression.the sum of a number y divided by four and the number.

127. ## Math

A rational function g has the lines x=2 and x=-2 as vertical asymptotes, the line y=4 as a horizontal asymptote, and numbers 3 and 1 as zeros. Find a formula for g(x). So I got g(x)=(4x^2-16x+12)/(x^2-4) Is this correct

know where this is before you begin any lab; you may need to find it in case of emergancy

make the subject (p) p+3=(pq+r)/2

2x^2+6x-16 and 14x^2-3x-2

131. ## System of equation

solve algebraically x^2 + y^2 = 16 x - y = 4

132. ## Physics

A rocket is launched at an angle of 42◦ above the horizontal with an initial speed of 76 m/s. It moves for 9 s along its initial line of motion with an acceleration of 29 m/s^2. At this time its engines fail and the rocket proceeds to move as a

133. ## Physics

A rocket is launched at an angle of 42◦ above the horizontal with an initial speed of 76 m/s. It moves for 9 s along its initial line of motion with an acceleration of 29 m/s^2. At this time its engines fail and the rocket proceeds to move as a

134. ## social science

How did forces of history lagency time epocjs events evolutions revolution affect the transformation of the western society and Ecuador and the spread of global civilization

135. ## 12th grade maths factorising expressions

make the subject (u) p=5t-u/u

136. ## science

Balance in acid solution PH3+ I2-> H3PO4+ I-

137. ## Algebra I

I am tying to determine whether the graph pairs below are parallel. x+12=y and y-x=-8. I have found the slope to x+12=y is 1. But I can't determine the slope for for y-x=-8. I am thinking maybe it is undefined, but I am not sure, since I am really new at

138. ## Physics

A particle moves in the xy plane with constant acceleration. At time zero, the particle is at x = 4.5 m, y = 6.5 m, and has velocity v(naught) = (6.5 m/s)i-hat + (−2.5 m/s)j-hat (arrow for v(naught) points toward positive x direction). The acceleration

139. ## Physics

if the speed of a moon car is .124 miles/second. How long, in minutes, would it take the moon car to go 5 kilometers.

140. ## chemistry

Naturally occuring chlorine gas has 3 isotopes 35cl-35cl, 35cl-37cl , 37cl-37cl a) mass of one molecule in terms of amu. b) mass of one molecule in terms of grams. c) mass of one mole in terms of grams. d) Naturally occuring Cl has 75% 35cl and 25% 37cl,

141. ## health

How might a novice (new person to health care) confuse advance directives within the Patient Self-Determination Act when distinguishing information as administrative or clinical when working with health records? Where would be the best website to explain

142. ## math

solve algebraically x^2 + y^2 = 25 y = x - 1

143. ## algebraically.

xy = -6 x + 3y = 3

144. ## physics

A car starts from rest and travels for 4.9 s with a uniform acceleration of +1.8 m/s2. The driver then applies the brakes, causing a uniform acceleration of -1.7 m/s2. The breaks are applied for 1.50 s. 1) How fast is the car going at the end of the

145. ## chemistry

If a soda can is 11.8 cm tall, how many would it take to make a stack to reach the moon?

Our teacher said that for trigonometry, even degree means that if we flip the graph, it is would look exactly the same. Then why is that sec is even function while csc is odd function??

147. ## Physics

Vector ~A has a magnitude of 7 and points in the positive x-direction. Vector ~B has a magnitude of 21 and makes an angle of 30â—¦ with the positive x-axis. What is the magnitude of ~A âˆ’ ~B ?

factorise: 2x^2+6x-16, and 14x^2-3x-2. Solve: 6y^2-5y-6=0, and 8x^2-2x-1=0. Rearrange: p=5t-u/u to make u the subject, and p(q+r)=(q-p). please help i've done about 40 questions and im just stuck on these. thanks for the help

149. ## partial command system

what is a partial command system

do you think the activation energy in living things is high or low

151. ## Physics

A fighter, traveling at 474 m/s fires a bullet perpendicular to its flight path. The muzzle velocity of the bullet is 515 m/s. At what angle to its intended path does the bullet actually travel? Answer between âˆ’180â—¦ and +180â—¦. Answer in

152. ## rly need help on math problem!

Directions: Use each statement as givena and draw a single conclusion using all of the statements. 1) No birds,except ostriches, are nine feet high.There are no birds in this aviary that belong to anyone but me. No ostrich lives on mince pie. I have no

153. ## Math

why is that sec is even function while csc is odd function??

154. ## Science - Physics

How long would it take you to drive from Houston to Gatorville LA (235 miles0 if you drive the first 75 miles at 60 mph, the next 100 miles at 65 mph, and the last 60 miles at 70 mph? What is your average speed for the entire trip?

155. ## Algebra

I am trying to find the equation to m= 8(3,2)This is what I did and then I get stuck, sorry m=8(3,2) y=2(8)(x-3) y=2x-? this is where I get stuck -24 or -5

156. ## precal - iterates?

Find the third iterate of the function f(t) = 9t - 3 when t0 = 1/3 + i/9.

Wha are the names of the smaller mountain ranges that make up the Rocky Mountains?

158. ## Science

How many constants can you have in a problem?

159. ## Geography

Two examples of geo-politics using knowledge on Latin America.

160. ## s.s

What is the definition for a scale on a map?

just like to check if ive got these right. if not can you help?? make the subject (q) p(q+r)=2(q-p)ans q=pr+2p/(2-p) make the subject (p) p+3=qp+r/(2) ans p=r-6/(2-q) make the subject (r) p(r-q)=2+3(q-r) ans r=2+3q+pq/(p+3) make the subject (x) y=r-qp/(x)

just like to check if ive got these right. if not can you help?? make the subject (q) p(q+r)=2(q-p) ans q=pr+2p/(2-p) make the subject (p) p+3=qp+r/(2) ans p=r-6/(2-q) make the subject (r) p(r-q)=2+3(q-r) ans r=2+3q+pq/(p+3) make the subject (x) y=r-qp/(x)

163. ## algebraically.

x^2 + y^2 = 25 y = x - 1

xy = 12 y = 2x + 2

165. ## math

9x^2 - 4y^2 = 36 y = 3x - 6

166. ## Math

Arthur has dimes and quarters, total number of coins is 35. The value of his collection is \$5.00. What number of each type is there?

167. ## Physics

sorry to keep posting this, but I have an assignment based on these problems (same equations different numbers) due in a couple hours. A rocket is launched at an angle of 42◦ above the horizontal with an initial speed of 76 m/s. It moves for 9 s along

168. ## Math

A commission of \$1,000 is to be divided between two people in a 3:5 ratio. How much should each person receive?

169. ## math

solve algebraically x^2 - 2y^2 = 11 y = x + 1

170. ## STATISTICS

THE ELECTION POLL REPORTED THAT A CANDIDATE HAD AN APPOROVAL RATIONG OF 30% WITH A MARGING OF ERROR E OF 4%. CONSTRUCT A CONFINDENCE INTERVAL FOR THE PROPORTIONS OF ADULTS WHO APPROVE OT THE CANDIDATE.

171. ## education

How would you interpret a question asking about "a lesson which provides all students an opportunity to learn about one of the sciences...."?

172. ## math

find r from the formula a=pie rl when pie= 3.142, a= 96, and i=12

173. ## geology

Refer to Figure 9.21 on p. 264 of the text. How would you determine the slope of the land surface in this figure? If you consider building a house in a location in this area, what is the best location for your house? Why?

174. ## physics

The diameter of some celestial body is 3080 km. What is the volume of this body? _____m3 How many of these celestial bodies would be needed to create a volume equal to that of Earth? The radius of the Earth is 6.38 106 m.

175. ## math

xy = 8 y = x + 2

176. ## World Religions

The gospel starts off with Jesus talking with some of his followers and telling them about sins. He continues to tell his followers about the sin of adultery. After speaking for a while Jesus gets up and leaves and the people are left confused. Then comes

177. ## Physics

I just need to clarify something in my mind- I look at a graph and the position changes from 3 to 8 over a ten second interval, to find total displacement, I just take 8-3 would equal 5 for total displacement, correct? I don't need to bother with the time

178. ## physics

A SUBWAY TRAIN IS MOVING WITH A CONSTANT VELOCITY ALONG A LEVEL SECTION OF THE TRACK. THE NET FORCE ON THE FIRST SUBWAY CAR IS ________ THE NET FORCE ON THE LAST SUBWAY CAR.

179. ## World Studies

What is the region of North America where the vikings landed?

180. ## Biology

What is the advantage of producing single sex gametophytes (heterospory) and what is the advantage of producing a bisexual gametophyte (homospory)?

181. ## maths

find d from the formula c=pie d when pi=3.142 and c=27

182. ## Biology

In pine, both the staminate and ovulate cones occur on the same tree, but not on the same branch. The ovulate cones are usually at the top of the trees, so that pollen from their own tree will not fall onto and fertilize the eggs. Why would this be an

183. ## English Literature

Dicuss three examples of the Anglo-Saxon belief in fate as shown in beowulf.

184. ## physics

A car is traveling at 28 m/s when the driver spots a large pothole in the road a distance 37 m ahead. She immediately applies her brakes. If her acceleration is -7.8 m/s2, does she manage to stop before reaching the pothole? What is this stopping distance?

185. ## Probability

Toss a fair coin ten times. Find the probabiltiy of getting heads at least once. Can anyone help me to see how this works out?

186. ## English lit

how does achilles enemy differ from beowulfs and gilgameshs

187. ## Grammar

(Check these please)Identify these sentences as compound, simple or run-on sentences. 5. Percy Shelley traveled in Europe and visited friends.(simple) 6. Shelley made friends with other poets; John Keats was Shelley's friend.(compound) 7. William Godwin

188. ## numerical method - elimination

htt\$\$p://i53.tiny\$pic.\$com/33dup2p.\$png Remove all the \$ sign. picture is of the problem. Thank you for the help!

189. ## algebra

Simplify. 3x+2y-5+3y-x=

190. ## Chemistry

A small hole in the wing of a space shuttle requires a 12.8cm^2 patch. What is the patch's area in square kilometers (km^2)? if the patching material costs NASA 3.21/in^2, what is the cost of the patch?

191. ## English lit.

Discuss history of the english language referring to major language families, branches,periods,changes, etc

192. ## algebra

help with math 116 week 8

193. ## geometry

Andelko measured the largest chord on his slice of pizza, and found it was 20 cm long. From the midpoint of the chord to the outside of the pizza, the shortest distance was 2 cm. What was the diameter of the pizza?

194. ## Physics

sorry to repost (again) but I'm not understanding how to solve this: A rocket is launched at an angle of 42◦ above the horizontal with an initial speed of 76 m/s. It moves for 9 s along its initial line of motion with an acceleration of 29 m/s^2. At this

195. ## English

Posted by rfvv on Wednesday, September 1, 2010 at 12:53am. He is standing still. (Is 'still' an adjective or an adverb?) English - karla, Wednesday, September 1, 2010 at 12:55am Is it modifying a noun(adjective) or a verb(adverb)? English - Writeacher,

196. ## chem2

If you have an insulated glass of water at 25 oC containing 10 fluid oz at 25 oC, how much ice would you have to add to end up with a final temperature of 0 oC and no ice left?

197. ## Psychology

How could Freud and Rogers have created theories that differ so fundamentally? If Rogers and Freud and changed places (turn of the century Vienna versus mid-20th-century US), would they still have developed the same theories?

198. ## calculus

Lim sin2h sin3h / h^2 h-->0 how would you do this ?? i got 6 as the answer, just want to make sure it's right. and i couldn't get this one (use theorem 2) lim tanx/x x-->0 and also this one (use squeeze theorem to evaluate the limit) lim (x-1)sin Pi/x-1

199. ## chemistry

Naturally occuring chlorine gas has 3 isotopes 35cl-35cl, 35cl-37cl , 37cl-37cl a) mass of one molecule in terms of amu. b) mass of one molecule in terms of grams. c) mass of one mole in terms of grams. d) Naturally occuring Cl has 75% 35cl and 25% 37cl,

200. ## Physics

sorry to repost (again) but I'm not understanding how to solve this: A rocket is launched at an angle of 42◦ above the horizontal with an initial speed of 76 m/s. It moves for 9 s along its initial line of motion with an acceleration of 29 m/s^2. At this

201. ## Algebra

Evaluate the logarithmic equation for three values of x that are greater than 1, three values of x that are between 0 and 1, and at x=1. Show your work. Use the resulting ordered pairs to plot the graph State the equation of the line asymptotic to the

202. ## physics

a 650 lb box is hanging by means of two ropes attached to a ceiling as shown by diagram below find the tension on the ropes

203. ## English

Can you please tell me if the following sentences are correct? They all refer to Shakespeare's The Merchant of Venice. Thank you. 1) The man who marries Portia will be the one who chooses the correct casket. 2) Shylock is notorious for charging very high

204. ## math

how many square yards of carpeting are needed for a room that measures 12.5 ft by 18.25 ft

205. ## calculus

Can someone please help me find the arc length of this curve? x = 3y^(4/3) - 3/32y^(2/3) y is between -64 and 64

206. ## chemistry

Convert a density of 2.74 x 103 g/L into a density with dimensions of kg/mL. please show how would this conversion be done.??

I need help with my math homework

208. ## Physics

2D Displacement: Particle moving, V(naught) 6.5 m/s(i-hat), -2.5 m/s(j-hat) arrow above V(naught) pointing in positive x direction. Also a= 6.5m/s^2 (i-hat), 1 m/s^2 (j-hat) I have V(sub-x) of 65 & V(sub-y) of 6.5, both after 9 seconds w/ initial point

209. ## Math

in salem, 42% of the registered voters are republicans and 44% are democrats. the other 217 are independents. how many registered voters are there in salem?

Synonyms of to imagine

211. ## math

find w from the formula k=wa+b whn k=30, b=6 and a=4

212. ## Language

Write the missing letters of each given verb. The meaning of the verb is given to help you identify the missing letters. 1.c_ _ _ _ e. To make a noise like a hen 2.p_ _ _ _ _ d. To imagine 3.h_ _e. To walk

213. ## maths

find w from the formula k=wa+b when k =30, b=6 and a=4

214. ## Physics

Sorry, I asked this question earlier but I didn't clarify it well: A plane drops a hamper of medical supplies from a height of 5210 m during a practice run over the ocean. The plane’s horizontal velocity was 133 m/s at the instant the hamper was dropped.

215. ## Chemistry

8.4cm = m 1333.8g=kg 119cm=mm 2391mL=L 3.22Mm=km 4.68fs=ps 8.86*10^11=Gm 1.57*10^-10m=picometers 381cm=in 94mm=in 5.0L=q 132kg=lbs

216. ## chemistry

the density of a certain aqueous solution is 1.17g/ml, and the solution is 3.57% by mass NaOH. how many mL of this solution would you need to use in order to prepare 100.0 mL of .150 M NaOH solution?

217. ## Physics

A fireman, 45.1 m away from a burning building, directs a stream jet of water from a ground level fire hose at an angle of 34.1 degrees above the horizontal. The acceleration of gravity is 9.8 m/s^2. If the speed of the stream as it leaves the hose is 58.8

218. ## Mathematics

Evaluate:- (a) (4/5 + 1/3)÷ 2/3 (b) (3/4 x 1/3 - 1/12)÷ 1/2 my answer of b comes 12 is it right? and if its not then can u explain me thanks

219. ## Mathematics

Evaluate 3 1/9 x (-3 3/5) ÷ 2 1/10 INTEGERS [3x(-3)-4x(-2)+5x2]+[-2x(-3)+8x(-2)-8x2]

220. ## Government

Im supposed to find an article from this summer (June- August 30) on how the Democratic or Republican party is trying to influence or control the governmental action then write about it. Please help me find an article. ( I've already did 9 on different

221. ## Calculus

A rational function g has the lines x=2 and x=-2 as vertical asymptotes, the line y=4 as a horizontal asymptote, and numbers 3 and 1 as zeros. Find a formula for g(x). So I got g(x)=(4x^2-16x+12)/(x^2-4) Is this correct Math Mate?