Questions Asked on
March 6, 2012

  1. English literature

    What figure of speech is 'the heavens let loose' in a comprehension implying a heavy rain

  2. math

    how many 2 card hands are possible with a 26 card deck?

  3. physics

    power supply has an open-circuit voltage of 39.0 V and an internal resistance of 2.00 Ù. It is used to charge two storage batteries connected in series, each having an emf of 5.50 V and internal resistance of 0.300 Ù. The charging current is to be 3.30

  4. physics

    A string is wound is tightly around a wheel. When the end of the string is pulled through a distance of 10 cm, the wheel rotates through 5 revolutions. What is the radius of the wheel?

  5. Math

    Stan's Cans, Inc. expects to earn $150,000 next year after taxes on sales of $2,200,000. Stan's manufactures only one size of garbage can and is located in the small, but beautiful, town of Mount Dora, Florida. Stan sells his cans for $8 a piece and they

  6. Physics

    What type of spectrum is produced by a hydrogen gas when a high potential difference is applied to it? a visible spectrum emission spectrum absorption spectrum a continuous spectrum I've been all through my notes and cant figure this one out :/

  7. Chem 2

    5 drops of 0.10M NaOH were added to 20mL of the buffer problem, the pHwent from 3.40 to 3.43. Write a net ionic equiation to explain why the pH did not go up to about 10, as it would have if that amount of NaOH were added to distilled water or to 20mL

  8. AP CHEM please help

    Write the standard line notation for each cell below. IO3-(aq) + Fe2+(aq)--> Fe3+(aq) +I2(aq) ________________________________________ H2O2 + 2 H+ + 2 e- --> 2 H2O E = 1.78 V O2 + 2 H+ + 2 e- --> H2O2 E= 0.68 V ________________________________________ Mn2+

  9. physics

    Consider the Sun to be at the origin of an xy-coordinate system. A telescope spots an asteroid in the xy-plane at a position given by (1.8 1011 m, 3.1 1011 m) with a velocity given by (-8.4 103 m/s, -6.3 103 m/s). What will be the magnitude of the

  10. Physics

    Two horizontal forces F1 and F2 act on a 1.7 kg disk that slides over frictionless ice, on which an xy coordinate system is laid out. Force F1 is in the negative direction of the x axis and has a magnitude of 3.0 N. Force F2 has a magnitude of 9.0 N. What

  11. ALGEBRA II

    The sum of a number and 20 times its reciprocal is 9. Find the number(s). Please show working

  12. Math problem solvimg

    Sally's grandfather is 67 tears old. Sally is 19 years old. At what age will Sally be exactly one third of her grandfather's age? How old will her granfather be then?

  13. physics

    The value of g at Earth’s surface is about 9.8 m/s^2. If Earth were of uniform density (same mass/volume throughout), what would the value of g be inside Earth at half its radius?

  14. Math

    18. Carla earns $8.43 per hour working 40 hours a week. If she worked 7 overtime hours one week, what would be her earnings? $396.21 $366.74 $425.75 19. Lauren earns $3.75 per hour as an usher. In 5 days her tips were $19.75, $25.30, $18, $21.50, and

  15. geometry

    A blueprint for a house has a scale factor of 1:35. A wall in the blueprint is 3inches. What is the length of the actual wall? Can someone explain how to figure scale factor?

  16. Chemistry

    How would the titration curve of hydrochloric acid solution differ if barium hydroxide was used to titrate instead of sodium hydroxide? How would the titration curve of hydrochloric acid solution with sodium hydroxide differ from the titration curve of

  17. physics

    An R-C circuit is driven by an alternating voltage of amplitude 110 and frequency . Define to be the amplitude of the voltage across the capacitor. The resistance of the resistor is 1000 , and the capacitance of the capacitor is 1.00 . I need help on what

  18. Physics

    A child drops a ball onto the road 28 m in front of a car travelling at 50 km/h. If the car can decelerate at a rate of 3.5 m/s2, will it stop before hitting the ball?

  19. calculus

    if f(x) = square root of e^2x +1, then then f'(0) equals what?

  20. math

    the ratio of boys to girls is 9 to 10. There are 189 boysin the school. How many girls are there?

  21. physics

    A small light source located 1 m in front of a 1 m^2 opening illuminates a wall behind. If the wall is 1 m behind the opening (2 m from the light source), the illuminated area covers 4 m^2. How many square meters will be illuminated if the wall is 3 m from

  22. math

    A wooden pyramid, 12 inches tall, has a square base. A carpenter increases the dimensions of the wooden pyramid by a factor of 5 and makes a larger pyramid with the new dimensions. Describe in complete sentences the ratio of the volumes of the two

  23. physics

    An ocean liner experiences broad waves, called swells, with a frequency of one every 20 seconds (0.05 Hz) and a wavelength of 440 feet. Assume the waves are moving due east. If the liner maintains a speed of 15 miles per hour, will it have a smoother trip

  24. chemistry

    Zinc combines with hydrochloric acid to form aqueous zinc chloride and hydrogen gas. If 300.0 mL of a 0.150 M solution of HCl is allowed to react with excess zinc, how many moles of hydrogen gas would be produced? Part two: if this reaction happens at STP

  25. solve nP5 = 120 x nC3

    nP5 = 120 x nC3

  26. geometry

    A microscope shows you an image of an object that is 80 times the actual size. Therefore, the scale factor of the enlargement is 80. An insect has a body length of 7 millimeters. What is the body length of the insect under the microscope? I know it's 560,

  27. Physics

    Two charges are located along the x-axis. One has a charge of 6.3 μC, and the second has a charge of −3.4 μC. If the electrical potential energy associated with the pair of charges is −0.043 J,what is the distance between the charges? The value of

  28. physics

    Rank the microtidal forces on your own body, from greatest to least, produced by the:A. JupiterB. PlutoC. Earth greatest to least.

  29. Chemistry

    find the ph of 0.100M NaC2H3O2 solution. do i just write an equation and solve for x NaC2H3O2 +H2O= Na2O + HC2H3O2- 0.100 0 0 so x^2/0.100-x =1.8 X10^-5 x=1.3X10^-3 then do ph=-log(1.3X10-3) ph=2.9 is this right?

  30. Physics

    An R-C circuit is driven by an alternating voltage of amplitude 110 V and frequency w. Define V0 to be amplitude of the voltage across the resistor. The resistance of the resistor is 1000 ohms and the capacitance of the capacitor is 1 microFarad. What is

  31. math

    given the function F(x)=7x+8. find each of the following f(10)= f(-6)= f(0)= please explain

  32. Math

    what is 0.0878 rounded to the nearest tenth?

  33. 3 grade english

    a graphic source is an image that help you understand what you read. common graphic source include charts, graphs,and diagrams. study the following graphic source. then answer the questions below. the worst volcanic eruptions in history VOLCANO| LOCATION|

  34. Science

    Radioactive substance decays so that after t years, the amount remaining, expressed as a percent of the original amount, is A(t)=100(1.6)^(-t). a) Determine the function A’, which represent the rate of decay of the substance. b) what is the half-life for

  35. Geometry

    isaac is landscaping a yard , to see how well a tree shades are area of the yard. He needs to know the trees height . The trees shadow is 18 feet long at the same time isaacs shadow is 4 feet long if isaacs is 6 feet tall how tall is the tree

  36. Math

    A weight attached to a spring is pulled down so that it is 10 cm from the floor and is released so that it bounces up and down. When the effects of friction and gravity are ignored. It's height can be modeled by a sine function of the time since it started

  37. Biology

    Explain how skin, bones and muscles are related to each other and Why is this relationship important to the understanding of the skeletal and muscular systems?

  38. Calculus

    1.Determine the maximum value of the function f(x)= 5^x -x^5 on the interval 0≤x≤≤2. 2. Determine the minimum value of the function f(x)= e^(-x) - 2e^x on the interval -1≤x≤2.

  39. astronomy

    A body has four times the mass of the Earth but its radius is two times larger. What is the acceleration of gravity on the surface of this planet? If you were on this planet, should you be able to jump (on average) farther distances, shorter distances or

  40. physics

    A bicycle odometer (which measures the distance traveled) is designed for 27” wheels. What happens if you use it on a bicycle with 24” wheels? Will the odometer show the same, a larger or small distance traveled? Explain.

  41. math

    Your apartment's monthly rent was $300 last year. This year it is $350. What is the rate of inflation, to the nearest tenth percent?

  42. physics

    When the string is pulled a distance of 40 cm in 2.50 s, the wheel turns though 5 revolutions. What is the average speed of the string, and what is the average angular velocity of the wheel? What is the radius of the wheel?

  43. physics

    The string is pulled so that it accelerates at3 m/s^2. What is the angular acceleration of the wheel?

  44. Mechanics M1

    A child is splaying with a toy aero plane. the aero plane is flying with velocity (6i + 2j)m/s. A breeze begin to blow with velocity 0.5j m/s affecting the motion of the aero plane. a) find the magnitude of the resultant velocity of the plane b) find the

  45. Calculus

    2. Determine the minimum value of the function f(x)= e^(-x) - 2e^x on the interval -1≤x≤2. Answer is minimum value 7.12?

  46. MATH

    If the mean score on a set of 24 tests is 81and two more students took the test and score a 70 and a 59 what would be the new mean?

  47. PHYSIC

    TWO BLOCKS ARE CONNECTED BY A LIGHT STRING THAT PASSES OVER A FRICTIONLESS PULLEY AS SHOWN IN THE DIAGRAM. THE COEFFICIENT OF KINETIC FRICTIONBETWEEN THE 6.0KG BLOCK AND THE SURFACE IS 0.25.FIND THE ACCELERATION OF THE 8-KG BLOCK AND THE TENSION OF THE

  48. Social 30-1

    hello i am doing a recearch project on Hong Kong and one of the questions are: what are your countries Fiscal and monentary policies? i cant find them anywhere. if i could get your help that would be great!

  49. science

    An amusement park has 2 roller coasters, a red one and a blue one. The first hill on the red roller coaster drops 10 meters. The blue roller coaster drops 25 meters. On which roller coaster will cars have the greater kinetic energy at the bottom of the

  50. Physics

    An object is placed in front of a converging lens in such a position that the lens (f = 14.0 cm) creates a real image located 27.0 cm from the lens. Then, with the object remaining in place, the lens is replaced with another converging lens (f = 18.0 cm).

  51. Physics

    I have no idea how to do this question. Would be appreciated if someone help =) The velocity of a car is given by v(t)=60(1-[0.7]^t), where v is measured in m/s and t is measured in s. Determine the following: a)What is the acceleration function? b) What

  52. math

    Solve. Check for extraneous solutions. 1) (/3x+7) = x-1 2) (3/2x)-3=9 Note: (/3x+7) is the square root of 3x plus 7 and (3/2x)-3=9 is 3 times the square root of 2x - 3 equals 9.

  53. Science-Space

    Compare Earth and the moon in terms of size and surface gravity.Explain please. What is the relationship between the moon's surface gravity, lack of an atmosphere, and temperature range? Explain please!

  54. Physics

    Which of the following statatements is correct? a. Thermos bottles keep food warm by combating heat loss through convection. b. A thick quilt is an example of an isulator with a low R value c. An object that is cool to the touch at room temperature is a

  55. Geometry

    An A-frame house is 40 feet high and 30 feet wide. Find the angle that the roof makes with the floor. Round the angle nearest degree.

  56. geography

    where will you be if you travel 6380 km around the world in any direction?

  57. Chemistry

    If 14.0 kilograms of Al2O3(s), 57.4 kilograms of NaOh(l), and 57.4 kilograms of HF(g) react completely, how many kilograms of cryolite will be produced?

  58. math

    had a balance of $2,539.78 in her savings account. She withdrew $150.00 and the teller credited her account with $6.19. What is her new balance?

  59. math

    Ms. S 's classrõm has 35 desks arranged in 5 by 7 rows.How many students does Ms. S have in her class if there are 6/7*4/5 desks occupied

  60. scientist

    WHAT IS GENE?

  61. math

    What is the maximum number of perpperoni slices that will fit on an 8 inch pizza? (They may touch, but not overlap)First make an estimate and then test yourself.

  62. Math

    A weight attached to a spring is pulled down so that it is 10 cm from the floor and is released so that it bounces up and down. When the effects of friction and gravity are ignored. It's height can be modeled by a sine function of the time since it started

  63. books

    WHO IS THE FOUNDER OF PAKISTAN?

  64. books

    WHERE WAS THE QUID-E-AZAM BORN?

  65. Math<3

    What is the Value of -2(x-4)+1 when x=9? i got -9 is that right?

  66. Physics

    To move a crate across a rough floor, you pull on it at an angle of 21 degrees above the horizontal. How much force is needed if the mass of the crate is 32kg and the coefficient of static friction between the crate and floor is 0.57

  67. English

    What was so great about Henry Wadsworth Longfellow when it came to his work? What inspired him make write the types of poetry that he had?

  68. math! help please wont take long

    find the value of K so that 3x^2-6x+k=0 has a double root answer is 3. how do you find that

  69. ALG/TRIG

    I cannot seem to get the right answer. Animal Pulse Rate According to one model, an animal’s heart rate varies according to its weight. The formula N(w)=885w^-1/2 gives an estimate for the average number N of beats per minute for an animal that weighs w

  70. physics

    You throw a 141 g ball straight up to a height of 45.0 m. Assume that the displacement of your hand is 0.70 m as you throw the ball straight up. How long is the ball is in your hand?

  71. Calculus

    I have no idea how to do this question. Would be appreciated if someone help =) The velocity of a car is given by v(t)=60(1-[0.7]^t), where v is measured in m/s and t is measured in s. Determine the following: a)What is the acceleration function? b) What

  72. 4 th grade Math

    Of the first graders who were asked, 1/6 like math best, 2/3 like reading best, and 12 like science best. How many first graders were asked their favorite subject? Into how many equal parts should the picture be divided?

  73. math

    Ryan wants to use 22 feet of fence to surround a section of grass for his dog to play in. He wants the area of this section of grass to be 30 square feet. Which dimensions could Ryan use for this section of grass? 2ft by 9 ft 3ft by 8 ft 4 ft by 7 fy 5 ft

  74. calculate ratios

    Calculate the amount of drug in a ratio solution. How many micrograms are in 1ml of a 1:5000 solution?

  75. Chemistry

    How to set up to solve the equation 2 KCLO^3 ---> 2KCL + 3O^2 HOW MANY MOLES OF O^2 CAN BE PRODUCED BY LETTING 12.00 MOLES OF KCLO^3 REACT?

  76. physics

    A 55-kg woman contestant on a reality television show is at rest at the south end of a horizontal 148-kg raft that is floating in crocodile-infested waters. She and the raft are initially at rest. She needs to jump from the raft to a platform that is

  77. books

    I am having trouble finding the birth date of Lady Montague from Romeo and Juliet. If you can please help me i would really appreciate it!!!!!!!!!!!!!!! Thanks sooooooooooo much, Isabel

  78. Math

    What Is 48cm in inches?

  79. physics

    A batter hits a baseball at a speed of 38.0 m/s and an angle of 65.0^\circ above the horizontal. At the same instant, an outfielder 70.0 m away begins running away from the batter in the line of the ball’s flight, hoping to catch it.

  80. physics

    A car initially traveling eastward turns north by traveling in a circular path at uniform speed as in the figure. The length of the arc ABC is 214 m, and the car completes the turn in 40.0 s (Figure shows coordinate plane with point A on -y axis point C on

  81. Math

    Assume k is a constant. the function g(x)= x4- 6k(x2) + 6k2 + x has at least one point of inflection a- if and only if k>0 b- if and only if k >= 0 My answer: g'(x) = 4x3 - 12kx + 6k2 g''(x) = 12x2 - 12k = 12(x2 - k) k has to be greater than 0 to make

  82. English

    Writeacher, I urgently need you to check this email. In particular, I wrote a few things I need to express better. 1) He has such a strong determination he always menages to achieve his goals. Thank you very much for your prompt reply. 2) Our students

  83. Physics

    A block P of mass 2.75 kg is lying on a rough inclined plane of angle è=0.87 radians. Block P is attached via a model string that passes over a model pulley to a second block Q of unknown mass M kg hanging vertically. The coefficient of static friction

  84. maths urgent

    The cost of 2 badminton rackets and 2 tennis rackets is $240. The cost of 3 tennis and 2 badminton rackets is $300. How much is a tennis racket?

  85. Physics

    A uniform beam AB of mass 65.3kg rests against the smooth vertical wall at A, and the rough horizontal floor at B, at an angle 45deg. The coefficient of static friction between the beam and the horizontal floor is ì=0.242. Calculate the magnitude of the

  86. Math

    How much more crust does a large pizza with a diameter of 12 inches have than a small pizza with an 8-inch diameter?

  87. physics

    Careful measurements of local variations in the acceleration due to gravity can reveal the locations of oil deposits. Assume that the Earth is a uniform sphere of radius 6370 km and density 5500 kg/m3, except that there is a spherical region of radius 1.7

  88. LAW

    well, i am not a student of Law..nut i have got a question to do..and i have searched it on the net..but i did not found the required answers..thats why am posting it here: What are the materials used for interpretation by Judge? Briefly can someone tell

  89. Pre-Cal

    solve and round your answer to 4 dec. sinx= .4 in [0,2pi] secx= -3 in [0,pi]

  90. language arts

    I am writing a letter from the view point of an Italian immigrant in the 1920s. I am having trouble finding some sites that would give me reliable information about what their life is like and what kind of working conditions they have (hours, pay,

  91. Math

    The size of a bacteria population is given by P=C*e^(kt) Where C is the initial size of the population, k is the growth rate constant and t is time in minutes. a) If the bacteria in the population double their number every minute, what is the value of k? I

  92. chemistry

    A student found that there are 93 drops of glacial acetic acid in 2.00 mL. Calculate the number of drops of glacial acetic acid

  93. Math

    # 1 if the area of the parallelogram is 39cm2, what is its base? ____cm # 2 if the base of the triangle is 2 times its height, what is its area? ____cm need help

  94. Pre-Cal

    given the function y=2sin3x-1, identify the following below. also show its graph for the primary cycle. (identifying parts of a trig. equation) asymptotes= k= c= axis= primary cycle= period=

  95. English

    What does it mean that H.W. Longfellow reached the "household name" status?

  96. math

    paula and sam played in the park for 30 minutes. How many quarter hours did they spend in the park?

  97. math

    four rectangular pictures each have an area of 2400cm2 the sides are all multiples of 5 what sizes could the pictures be

  98. Life Orintation

    Define the following terms.....Patriarchy,Social Norm,Gender Roles,Gender Stereotypes,Gender Equality.

  99. Science

    How can scientists use the geologic time scale by sequencing the events of the earth in a time line?

  100. statistics

    A company that manufacturers bookcases finds that the average time it takes an employee to build a bookcase is 23 hours with a standard deviation of 8 hours. A random sample of 64 employees is taken. What is the likelihood that the sample mean will be 18

  101. Physics

    A car traveling at 58 km/h hits a bridge abutment. A passenger in the car moves forward a distance of 63 cm (with respect to the road) while being brought to rest by an inflated air bag. What magnitude of force (assumed constant) acts on the passenger's

  102. Calculus

    For this problem, consider the function y=f(x)=x3 x2 – 1

  103. english

    In the story "pecos bill: the cyclone" how were the great plains formed?

  104. MS. SUE PLEASE ANSWER

    how do you write a fraction for a decimal?

  105. physics

    For S.H.M, a graph of acceleration against displacement gives a slope of 16 unit. The period is

  106. Maths

    For ghana lotto if 44-88 play closed in the first and second position respectively what order two number must follow in the next draws.

  107. west oktibbeha school

    chemistry question help me find the answer to this question How many atoms of chlorine are present in 6 moles of chlorine gas

  108. math

    A data set has one outlier. Why does the mode remain the same when it is calculated with and then without the outlier?

  109. English

    Just two more things. I can't find a proper verb to include in 1. 1) Can I officially inform the parents about the existing cooperation between our schools, which will be accomplished (??)through various projects? 2) As I wrote you or as I wrote to you in

  110. English

    I urgently need you to check the following sentences. Thank you,Writeacher. 1) They left to go back home. 2) They always sulk about having to do too much homework. 3) He's having a sulk about ... (could you help me complete this sentence?) 4) Peter and

  111. PHYSICS

    What is the acceleration (in meters/second^2) of a freely falling 73.0 kg sky-diver, if air resistance exerts a force of 273 N?

  112. Science

    During beta-particle emission, a neutron splits into a proton and an electron two protons two electrons two neutrons

  113. Singapore Math

    An animal shelter has 1008 cats, dogs and rabbits. The ratio of the number of dogs to the number of cats in the animal shelter is 3:7. The ratio of the number of rabbits to the number of dogs is 2:5. How many rabbits are there in the shelter?

  114. Statistics

    I need to find the measures of spread and center for each data set in a problem I am doing. How do I do that? Also, is the center the mean(average)? Or the median?

  115. English

    Writeacher, I clarified all the instances of "Prospero" and "Caliban". Thank you very much. 1) Who is Caliban? How did Caliban behave towards Prospero when Prospero first arrived on the island? Does Caliban regret his behaviour now? What does Caliban wish?

  116. English

    I varied my original email including other information. I wonder if you could help me express the new things, in 4 and 7. Thanks a lot! 1) Thank you very much for your prompt reply. 2) Our students would really like to be involved in a student exchange

  117. math

    15x-5=1+12x

  118. calculus

    find the volue of the solid that is obtained by revolving the baout the indicated axis or line y=1/2 x^2 +2 y=2 -2

  119. please help me

    A ball starts from rest and rolls down a hill with uniform acceleration, traveling 170 m during the second 5.5 s of its motion How far did it roll during the first 5.5 s of motion? x=

  120. please answer this Ms. Sue

    how do you write a fraction as a decimal?

  121. Math

    Suppose that the amount of algae is a pond doubles every 3 hours. If the pond initially contains 70 pounds of algae, how much algae will be in the pond after 9 hours? Is the answer 560? I was not sure how to set it up, but doubled it every 3 hours. If this

  122. what does this mean?

    What does it mean when my teacher says "quantify your conclusion." ???

  123. Chemistry

    If 3.70 mol calcium carbide (CaC2) reacts with an excess of water, how many moles of acetylene (C2H2) will be produced?

  124. physics

    The speed of sound in water is 1498 m/s. A sonar signal is sent straight down from a ship at a point just below the water surface, and 1.95 s later, the reflected signal is detected. How deep is the water?

  125. Math

    4 3/7 + 7 1/2 = Thanks

  126. Social Studies

    Of the problems experienced by the Confederation Congress, which do you think was the most harmul? and why

  127. physics

    A car is up on a hydraulic at a garage. The wheels are free to rotate, and the drive wheels are rotating with a constant angular velocity. Does a point on the rim of the wheel have (A) a tangential velocity, (B) a tangential acceleration and (C) a

  128. Algebra 208

    Write a formula that converts x hours to y seconds

  129. English

    What was Longfellow's literary zeal??

  130. Maths

    Using a cramers and guassian elimination method solve this; a+2b+3c=600 2a+3b+c= 900 3a+b+2c=800

  131. physics

    a right triangle has a side of 41.2 m and a side of 9.8 m. find the length of hypotenuse

  132. trig

    16. Let W(ƒá ) be a point in Quadrant I on the unit circle with center O. W(ƒá )B is perpendicular to the x-axis at B, OB = 0.6. and W(ƒá )B ƒ­ 0.8. Find:

  133. math

    Compare these voting methods: Majority, Plurality, Borda, Hare, Pairwise Comparison, Tournament, and Approval by: o Indicating the advantage and disadvantage of implementing each method in conducting the next presidential election. o Give an example where

  134. 4th grade iconimics

    a total of 200 raffle tickets have been sold, and 50 of those tickets will win prizes.if you have only one raffle ticket, what are the chances that you that you will win a prize? A- 1 in 3 B- 1 in 4 c- 1 in 5 D- 1 in 6 E- NG (not given) I think the answer

  135. College Algebra

    Let U = {5, 6, 7, 8, 9, 10, 11, 12, 13, 14}, A = {6, 8, 10, 12}, B = {9, 13}, and C = {6, 9, 12, 13, 14}. List all the members of each of the sets. (a) (A ¿ B) ¿ C , (b) A ¿ B ¾ C

  136. Math

    14 1/2 - 5 1/4 =

  137. math

    andy is wrapping a present to give to his mother which is in the shape of a cube.each edge of the cube measures 12 inches. how much wrapping paper does he need.

  138. Stats

    What is the spread? How can it be found from a set of numbers?

  139. Math

    Two children sit on a seesaw that is 14 ft long. One child weighs 95 lb, and the other child weighs 69 lb. If x is the distance of the 69-pound child from the fulcrum when the seesaw balances, state the value of each of the other variables in the

  140. Calculus-derivatives

    Verify if these are correct answers. 1. The derivative of f(x)=e^2x -e^-2x is f'(x)=2e^2x - 2e^-2x? 2.A certain radioactive substance is decaying so that at time t, measured in years, the amount of the substance, in grams, given by the function

  141. math

    Jean has 4 times as many marbles as Peter. If Jean gave 18 marbles to Peter, they would then have the same number of marbles. How many marbles does each have?

  142. chemistry

    At 50 fahrenheit the maximum amount of water vapor in air is 9g/m3 if the relative humidity is 40% what is the mass of water vapor in 1m3 of air

  143. chemistry

    how many moles of suctose are in 0.8L of a 2M solution? How many molecules of sucrose is this?

  144. physics

    Give 1 word term 1.changing momentum. 2.unimpeded motion of an object. falling under the influence of only gravity. 3.the phenomen that waves bend around the edges of an obstacle. 4.The force per unit charge at a point in an electric field. 5.the vector

  145. bus 100

    "Information Technology" Please responds to the following: Predict how technology will positively impact business over the next ten (10) years. Describe what specific changes or paradigm shifts you expect to see. Within the same 10-year period, discuss the

  146. math

    The fixed cost to set up a manufacturing business for gizmos is $1200. In addition, each gizmo costs $12 to produce. What is the fewest number of gizmos that a manufacturer must sell at $20 a piece to break even on costs?

  147. bus 100

    Operations Management" Please responds to the following: Review the major responsibilities of the operations manager and determine which responsibility is the most challenging. Assess and discuss your ability to succeed in this type of position. Discuss

  148. Math

    A triangle has an angle whose sine is equal to 1/2. The angle is larger that 43 degrees in measure. Find the exact measure (in degrees) of the angle. I did sin x = 1/2 and got 150 for the answer Is this right? Thank You!

  149. geometry

    An oval indoor running track with semicircular ends has the dimensions of 80' long, 34' wide, and the individual lane width is 5' wide. If the track is to be resurfaced how many square feet of material will be required? Help Please!

  150. math

    If a trend line had the equationy=x+9 what y value would you expect bto obtain when x is 20

  151. IPS

    why do glass bottles containing carbonated drinks sometimes explode when left in the sun for too long?

  152. Math

    Helle, i need help for simplify the expression: [( cos x) ( sin x) - ( sin x) ( - sin x)] / ( sin x) ²

  153. Sociology....

    Explain why is the best method for studying human social development is by using Piaget's Theory of Cognitive Development?

  154. MATH

    Need Answer to the Following Please: Using the 9 digits, 1, 2, 3, 4, 5, 6,7, 8 and 9 you can arrange four different digits to form a four-digit number that is NOT divisible by 7. The digits 1238 cannot be arranged to create a four-digit number that is

  155. math

    30, 29, 7. 29, 32 What is the effect of the outlier on this data set?

  156. physics

    The electric motor of a model train accelerates the train from rest to 0.680 m/s in 23.0 ms. The total mass of the train is 580 g. Find the average power delivered to the train during its acceleration.

  157. Chemistry

    I need to find the tested and published pH values of the following solutions: (1) 1.0 M NaCl (2) 1.0 M sodium acetate (3) 1.0 M sodium sulfate (4) 1.0 M Sodium Bisulfate (5) 1.0 M Sodium Carbonate (6) 1.0 M Ammonium Chloride\ Is there a reliable MSDS

  158. writing skills

    if we were teenagers at the time these signified our passage to adulthood.

  159. Math :(

    A rectangular pyramid with the base of 12 feet by 8 feet need to be filled with balloons. if the pyramid 16 feet tall, how much space is available for the balloons?

  160. physics

    pound a nail

  161. Chemistry

    Calculate the heat (in kJ) required to change 40.0g of ice at -30.0 deg C to steam at 150.0 deg C?

  162. Calculus

    Determine the maximum and minimum value of the function f(x)=-xe^x + 2.

  163. physics

    The speed of sound in water is 1498 m/s. A sonar signal is sent straight down from a ship at a point just below the water surface, and 1.95 s later, the reflected signal is detected. How deep is the water?

  164. math 208

    -8-(-9)+(-1)-24=

  165. Chemistry

    What is the ph of the final solution when 10 mL of HCl is completely neutralized with 11mL of 0.1M Na(OH)?

  166. Chemistry

    I need to calculate the valueof Kc for 5 test tubes for an experiment that I completed on determination of Kc. The equation used was Fe^3+ + SCN^-= FeSCN^2+ After creating an ice table for the first test tube my values for Fe and SCN were 6.5e-4M and for

  167. math

    everyday when lisa returns from school she puts her change from buying lunch into a jar on her hair dresser. this weekend she decided to count her savings. she found that she had 72 coins all nickels and dimes. the total amount was $4.95. how many coins of

  168. Physics

    AM radio signals are broadcast at frequencies between 540 kHz and 1585 kHz (kilohertz) and travel 3.0 X 10^8 m/s. a. What is the range of the wavelengths for the signals? (from shortest to longest). b. FM frequencies range between 88MHz and 108 MHz

  169. math

    what are the odds in favor of randomly drawing the letter m from the letters in the word remember? would it be 2 out of 8 would you simplify it to 1 out of 4??? help

  170. Chemistry(Please help, thank you!)

    If the time elapsed is 4.26 min, what is the value of the rate constant, k? ln[R]t / [R]o = -0.0237 I am not sure how to slove this. Is Rt 4.26 min?

  171. math

    at hill school 112 new books arrived for each grade 2nd, 3rd and 4th which shows one way to find about how many books arrived at the school in all

  172. Calculus

    Determine the slope of the tangent to the function f(x)=5xe^x at the point with x-coordinate x=2 a) -1/5 b) 10e^2 c) 15e^2 d) -5e^2

  173. social studies

    what happened to florida at the end of the american revolution

  174. Math help

    If a trend line had the equation: y=x+9 what y value would you expect to obtain when x is 20??

  175. Physics

    A car is doing a loop-the-loop. The loop has a radius of .4m. Assume the car is starting with the minimum speed it needs in order to stay in contact with the track at all times (at the top of the track, the car is not applying a force to the track).

  176. english

    latin, greek, english, and balto-salvic are all____ languages.

  177. Algebra 2

    How would I graph this function as a parabola: f(x)= -2(x+9)^2

  178. physics

    Which of these cannot occur? A) A satellite orbiting about the equator.B) A satellite orbiting about the Earth's poles.C) Actually all these can occur.D) A satellite orbiting about the Arctic Circle.

  179. Social Studies

    Was the TVA program in the New Deal aimed at relief or reform? I've seen different answers on the internet. Thanks.

  180. physics

    What net force is needed to accelerate a 1.6 × 103kg automobile forward at 2.0 m/s2?

  181. math 208

    s-7/11=26/11

  182. Algebra1

    x(x-32)=0

  183. math

    What quality represents four and one tenth more than some number is greater than eight and nine tenths

  184. geometry

    A hot air balloon is in the shape of a sphere. Approximately how much fabric was used to construct the balloon if its diameter is 32 feet? Use 3.14 for . Round to the nearest hundred square feet.

  185. English

    I've added a few more things to a sentence. I'd like you to check it. I included another doubt. 1) In particular, we may be interested in two different types of two-week courses: one for students, whose level usually ranges from low intermediate to upper

  186. math

    A rectange has dimensions of 1 and 6. Another rectangle was drawn from it using a scale factor of 1.5. A. The area of the large rectangle is how many times the area of the small rectangle? B. The perimter of the large rectangle is how many times the

  187. math

    110lb/d=__oz/wk

  188. algebra

    A building has 5 walls each wall is between 170 and 190 feet long what is the total estimated distance around the building

  189. math

    For parts a-c, explain what would happen to a figure if you transformed it using the given rule A) (3x,6y) - B) (x+2,y+1)- C) (2x,2y+5)-

  190. math

    Which decimal is equivalent to 25/100 A.2.5 B.2.05 C.0.25 D.0.025 C

  191. Medical billing and coding

    compare and contrast contributory negligence with comparative negligence.

  192. science

    a bicycle coasting on a level sidewalk kinetic or potential energy?

  193. Chemistry

    How much heat in kJ is lost when 100.0g of steam at 200 deg C is cooled down until it forms ice at -30.0 deg C?

  194. physics

    A boy wishes to row directly across a river but the current flows at 1.5m.s-1 east. He can row at 3m.s-1. Draw a labelled vector diagram

  195. Math

    How to solve- |-4(7-x)|=3

  196. Math help

    If a trend line had the equationy=x+9 what y value would you expect bto obtain when x is 20

  197. Math help

    If a trend line had the equation: y=x+9 what y value would you expect to obtain when x is 20??

  198. Organic Chemistry

    how many grams of ZnCl2 are needed to prepare 250 ml of an aqueous solution with an osmolarity equal to 0.300?

  199. grammar

    What should i put? Five dollars (was,were)lying on the ground,so i turened them in at the office.

  200. Physics

    A converging lens ( f = 12.2 cm) is held 7.65 cm in front of a newspaper, the print size of which has a height of 1.88 mm. Find the image distance (in cm) and the height (in mm) of the magnified print. d = cm h = mm

  201. frost

    whatt is the significance of the poem The Road not taken by Robert Frost?

  202. algebra

    -7/3x+2/3=-11

  203. Organic Chemistry

    how many grams of ZnCl2 are needed to prepare 250 ml of an aqueous solution with an osmolarity equal to 0.300 osmol? I posted this question a few minutes ago, but forgot to add the last part of the sentence. Thanks!

  204. Physics

    Red light (n = 1.520) and violet light (n = 1.538) traveling in air are incident on a slab of crown glass. Both colors enter the glass at the same angle of refraction. The red light has an angle of incidence of 26.50°. What is the angle of incidence of

  205. physics

    Calculate the force of gravity on a 1 kg mass at Earth's surface. The mass of Earth is 6.0×10^24 kg , and its radius is 6.4×10^6 m.

  206. math

    at 2 p.m., the level of the water in the pool was 10 feet. at 6 p.m., the level of water was 2 feet. find the constant rate of change in the water.

  207. physics

    I am moving 3 blocks with a force of 3 newtons over a distance of 1 meter in 10 seconds. What is the power?

  208. 6th grade math

    If the volume of a rectangular solid is 80 cu inches, what dimensions will give the least amount of surface area?

  209. Math

    Rounding each mixed # to nearest whole #. 1 7/8 - 2 1/4 Plz explain answer, thx

  210. Chemistry

    If Kc = 0.450 at 40 degrees C and Kc = 0.545 at 90 C, what is the delta H for the reaction? X Y ____ kJ would this problem include using a van hoff factor..?

  211. math

    Numbers from least to greatest, which number could follow this order: 0.23,2/5,1/2

  212. physical science

    6. If one body is positively charged and another body is negatively charged, free electrons tend to [A. move from the negatively charged body to the positively charged body.] B. remain in the positively charged body. C. remain in the negatively charged

  213. Chemistry

    An equilibrium mixture of PCl5(g), PCl3(g), and Cl2(g) has a partial pressure of 217.0 torr, 13.2 torr, and 13.2 torr, respectively. A quantity of Cl2(g) is injected into the mixture, and the total pressure jumps to 263.0 torr. The appropriate chemical

  214. chemistry

    2. Aluminum chloride was a product in step 6. How could you instruct your lab partner to recover it.

  215. Math

    Parallelogram problem find the lenth of th base H- 5.9m area is 50.15square meters = base is

  216. algebra

    log(base6)3600=5x Whats the exact answer? show work please

  217. math

    Solve. Check for extraneous solutions. 1) (/3x+7) = x-1 2) (3/2x)-3=9 Note: (/3x+7) is the square root of 3x plus 7 and (3/2x)-3=9 is 3 times the square root of 2x - 3 equals 9.

  218. stats

    A survey shows that 60% of people who listen to a song on the internet will buy the song. A sample of 30 people who listened to a song is taken. What will be the mean and standard deviation of the number who will buy the song?

  219. math

    Solve. Check for extraneous solutions. 1) (/3x+7) = x-1 2) (3/2x)-3=9 Note: (/3x+7) is the square root of 3x plus 7 and (3/2x)-3=9 is 3 times the square root of 2x - 3 equals 9.

  220. Liu

    Find the present value of 9000 due at the end of 18years at 11%per year compounded monthly

  221. math

    Solve. Check for extraneous solutions. 1) (/3x+7) = x-1 2) (3/2x)-3=9 Note: (/3x+7) is the square root of 3x plus 7 and (3/2x)-3=9 is 3 times the square root of 2x - 3 equals 9.

  222. Chemistry

    find the ph of 0.100M NaC2H3O2 solution. do i just write an equation and solve for x NaC2H3O2 +H2O= Na2O + HC2H3O2- 0.100 0 0 so x^2/0.100-x =1.8 X10^-5 x=1.3X10^-3 then do ph=-log(1.3X10-3) ph=2.9 is this right?

  223. Chemistry

    If two titrations were completed were completed: 1) the titration of HCl with Na(OH) 2)the titration of HCl with Ba(OH)2 (the concentrations of acid and base for both titrations are the same) How would the titration curves of each solution be different? I

  224. Physics

    What minimum speed does a 100 g puck need to make it to the top of a 5.9 m-long, 29 degree frictionless ramp?

  225. MATH

    find a number that is 15 more than 4 times it's oppisite

  226. Physics

    A force of 150N is exerted horzontally to dispalacement through adstance of 400cm.how much work done?

  227. Physics

    (the drawing is of a square with each side equaling L and the opposites of each corner are equal to each other, so the mystery corner would be 3I) Four parallel long straight wires are carrying current perpendicular to the page, and the points at which

  228. calculus

    for abs value of x

  229. Science

    How can scientists use the geologic time scale by sequencing the events of the earth in a time line?

  230. math

    My question is write 3 improper fraction that equal 42/3

  231. Strayer

    I need Face Books financial statements, do you know what links I can go to?

  232. chemistry

    If 0.500 mol of nitrogen gas occupies a volume of 11.0 L at 0°C, what volume will 2.15 mol of nitrogen gas occupy at the same temperature and pressure?

  233. Chemistry

    I don't know how to reply to an answer. First of all thank you! For the question I just asked about the titration curves. Would that mean that titrating with barium hydroxide would take half the volume that is used when titrating with sodium hydroxide? Oh

  234. Math

    3 1/6 - 1 1/3 =

  235. algebra

    x^+6x+9 using the diamond and generic rectangle

  236. Science HELP!!!!!

    Why isn't there a solar eclipse and a lunar eclipse each month??????? Compare the size of high and low tides in a spring tide and a neap tide.What causes the difference???????

  237. english

    How teachers of secondary school students can engage and capture their students in spite of all temptations in life. what i think teacher can do is to make some jokes in between class. i don't know what else to write please help.

  238. physics

    A car is coasting backwards down a hill at -5.0 m/s when the driver gets the engine started. After 4 seconds, the car is moving uphill at a velocity of +3 m/s. What is the car’s average acceleration?

  239. physics

    Calculate the weight (in English units) of a 2300 kg tiger.

  240. ....

    what does "bifocal" mean?

  241. ALG/TRIG

    Lost is an understatement..please help me understand this. Orbits and Distance Johannes Kepler (1571–1630)discovered a relationship between a planet’s distance D from the sun and the time T it takes to orbit the sun. This formula is , where T is in

  242. Math

    Solve each equation for 0≤x

  243. Maths

    increasing orignal price of an article by 15% and then increasing the new price by 15% again is equivalent to increasing the orignal price by what %?

  244. geometry

    What's the missing side length in simplest form of 45 degrees, 45, & 10

  245. Physics

    Lake Erie contains about 4.8 x 10^17 grams of fresh water. Assume that the lake has frozen solid and that the ice starts off at -3 C. How much energy would the lake need to absorb from the Sun to cause it to evaporate completely? Each gram of water will

  246. Biology

    Which of the following would be the most sigificant between mitosis and meiosis? A. Chromosomes are duplicated before mitosis B. Meiosis is not followed by cytokinesis C. Homologous Pairs of chromosomes are split up in meiosis. D. Crossing over occurs in

  247. Physics

    A particle is projected vertically upwards from ground level with an initial velocity of 34.94m/s. Neglecting air resistance, calculate the total time taken, in seconds, for the particle to hit the ground again. Take the magnitude of the acceleration due

  248. physics

    Find the change in the gravitational force between two planets if the masses of both planets are doubled but the distance between them stays the same. Express your answer as an integer. I have no idea what exactly they are wanting here?? please help!

  249. English

    Writeacher, I urgently need you to check these questions. Thank you. (I also included the answer, which you have already revised). 1) Who is Caliban? How did Caliban behave towards Prospero when he first arrived on the island? Does he regret his behaviour

  250. calculus

    find dy/dx if y= (x^5)(e^(x^4))

  251. PHYSICS

    A person heats up a can of soup on a stove. If he does 250 joules of work on the soup by stirring it as the burner adds 1675 joules of heat, what is the change in its internal energy? I took 1675j - 250 j = 1425j

  252. Physics

    A dockworker loading crates on a ship finds that a 23-kg crate, initially at rest on a horizontal surface, requires a 75-N horizontal force to set it in motion. However, after the crate is in motion, a horizontal force of 50 N is required to keep it moving

  253. math

    Bob made a square table top with 100 white square tiles. He painted the tiles along the edge of the table red. How many tiles are red? You must show your work

  254. Principle

    "the maximum blood pressure in the upper arm of healthy person is about 12mmHg.If a vertical tube open to the atmosphere is connected to the vein in the arm of the person,determine how high the blood will rise in the tube.Take the density of blood to be

  255. English

    Writeacher, what time is in your country now? I really need you to check my last sentence. I hope you are not too busy with your grandchildren. Thank you very much for your invaluable help. 1) In particular, we may be interested in two different types of

  256. science

    If 14.0 kilograms of Al2O3(s), 57.4 kilograms of NaOh(l), and 57.4 kilograms of HF(g) react completely, how many kilograms of cryolite will be produced?

  257. chemistry

    Using standard heat of formations. (Appendix II in text). Calculate the standard enthalpy change for the combustion of methane. CH4 (g) + 2 O2 ---¨ 2CO2(g) + 2H2O (l) ƒ¢H0 = ?

  258. math

    From the pizza shop, James walks 12 blocks south, 22 blocks east, 18 blocks north, and 30 blocks west. What is the least number of blocks that he must travel if he returns to the pizza shop? Explain how you got your answer – draw a picture or write a

  259. Life orientation

    Explain three checks and balances that are in place in south africa that control and regulate the media

  260. Chemistry(Please help)

    I had to make a graph using lnK vs 1/T and find the slope. The slope was -1.23e4 and now I have to find Ea. Do I divide the slope by R

  261. physics

    Three blocks are connected on the table as shown below. The coefficient of kinetic friction between the block of mass m2 and the table is 0.370. The objects have masses of m1 = 5.00 kg, m2 = 1.40 kg, and m3 = 2.30 kg, and the pulleys are frictionless.

  262. math

    Which X|Y X|Y 1|~1 2|6 Y is 8 less than 8 timesX Y is 8 less than 7 times X Which

  263. PHYSICS

    A cylinder contains 0.1 cubic meters of gas at atmospheric pressure. This gas is allowed to expand until its pressure drops to 7800 Pa. What is the gas volume after this expansion has taken place? answer: 7800/10130 = 0.770

  264. PHYSICS

    At he lowest point in its swing, a 2.5 kilogram pendulum bob has 40 joules of kinetic energy. How high will it swing when it reaches the highest point in its swing? 40/2.5 x 9.8 = 1.63 joules

  265. English Law

    what is an arbitration clause? What is a cancellation clause? What is a prevailing law clause? What is a complaints procedure?

  266. physics

    Jose can jump vertically 1 meter from his skateboard when it is at rest. When the skateboard is moving horizontally, Jose can jump ____________________. A) no higher.B) appreciably higher.C) somewhat higher.

  267. algebra

    find mid point of line segment whose end points are given (-3,-2) (-10,-9)please explain how this is done

  268. Math

    Jesse has 2 1/3 pints of soup.He makes dinner for his friends and serves 1/2 of his soup.How much did he serve?

  269. calculus

    Use the trapezoidal rule and simpson's rule to approximate the value of the definite integral ∫2,1 ln xdx; n =4

  270. English

    This is about the book Oedipus the King. What are three distinct moments of suffering? How could these moments apply to Aristotle's theory: a critical component of tragedy is a scene of suffering.

  271. physics

    Atop a cliff, a projectile is fired horizontally with an initial speed of 10 m/s. Neglecting air drag, what is its speed 1 second after it is fired? A) 20 m/s.B) 14 m/s.C) 30 m/s.D) 28 m/s.E) 10 m/s. would this be 10 m/s?

  272. jake

    Suppose that you're facing a straight current-carrying conductor, and the current is flowing toward you. The lines of magnetic force at any point in the magnetic field will act in [A. a counterclockwise direction.] B. a clockwise direction. C. the

  273. accounting

    Write the journal entries to record the following transactions. A) Sold merchandise on account, $11,000, terms 2/10, net 30. The cost of merchandise sold was $8,000 (2 entries required). B) Issued a credit memorandum for $500 to the customer for

  274. math

    sec cube dx

  275. Geometry

    2 root3 = square root of xsquared + 5x

  276. statistics

    he mean height of a certain kind of plant is 190 centimeters. Suppose we want to carry out a hypothesis test to see if the mean height when these plants are treated with a certain chemical differs from 190 . State the null hypothesis and the alternative

  277. Chemistry(Please check)

    I need to calculate the valueof Kc for 5 test tubes for an experiment that I completed on determination of Kc. The equation used was Fe^3+ + SCN^-= FeSCN^2+ After creating an ice table for the first test tube my values for Fe and SCN were 6.5e-4M and for

  278. math

    sec cube dx

  279. math

    what is the prime factorization of 63?

  280. maths

    if the width of a rectangle was 38 and the length is 57 what is its perimeter

  281. accounting

    Write the journal entries to record the following transactions. A) Purchased $4,900 of merchandise from a supplier on account, terms FOB shipping point, 1/10, n/30, transportation charges of $80 were added to the invoice. B) Received a credit memorandum