Questions Asked on
April 23, 2014

  1. statistics (10)

    Annual starting salaries for college graduates with degrees in business administration are generally expected to be between $30,000 and $45,000. Assume that a 95% confidence interval estimate of the population mean annual starting salary is desired. What

  2. math

    A pulley whose diameter is 9 inches is connected by a belt to another pulley whose diameter is 6 inches. If the larger pulley runs at 1200 revolutions per minute, at how many revolutions per minute does the smaller pulley run? a. 800 b. 1080 c. 1600 d.

  3. Physics

    A small plane can travel at 200 km/h in still air. If a 50.0 km/h wind is coming from the east, determine the ground velocity of the plane if the pilot keeps the plane pointed [N].

  4. English

    If it snows tomorrow, what will you do? 1. If it snows tomorrow, I will go out with my dog. 2. If it snows tomorrow, I will make a snow man at the back yard. 3. If it snows tomorrow, I will meet my girl friend. 4. If it snows tomorrow, I will do snow

  5. chemistry

    Helpful steps? Calculate the predicted atomic radius for potassium, K, given the atomic radius of rubidium, Rb, (0.247 nm) and cesium, Cs, (0.265 nm).

  6. algebra

    To make a special mix, the owner of a fruit stand wants to combine cashews that sell for $7.00 per lb with walnuts that sell for $5.50 per lb to obtain a 35 lb hat sells for $6.50 per lb. How many pounds of each type of nut should be used in the mixture?

  7. Calculus

    a) Estimate the area under the graph of f(x)=7+4x^2 from x=-1 to x=2 using three rectangles and right endpoints. R3= ???? Then improve your estimate by using six rectangles. R6= ????? Sketch the curve and the approximating rectangles for R3. Sketch the

  8. Algebra please help

    $11,000, invested for 9 years at 3% compounded quarterly.

  9. geometry

    A satellite launch rocket has a cylindrical fuel tank. The fuel tank can hold V cubic meters of fuel. If the tank measures d meters across, what is the height of the tank in meters?

  10. Math

    You draw five cards from a standard deck of 52 cards. P(heart) = 4/5 (fraction). What type of probability is illustrated and why? Theoretical; the result is based on the number of possible outcomes** Theoretical; the result is found by repeating an

  11. math

    a circular pizza box logo has a sector with a central angle of 80 degrees and a diameter of 16 inches. Find the area of this sector

  12. geometry

    1.what is the area of a sector with a central angle of 160 degrees and a diameter of 5.8m? round the answer to the nearest tenth A. 8.1 m^2 B.4.0 m^2 C.47.0 m^2 D.11.7 m^2 2.what is the area of a regular octagon with a side of 8 in round the answer to the

  13. chemistry

    Please Help!what will happen if 50mL of 0.022M Na2S2O3, 50mL of 0.010M AgNO3 and 50mL of 0.097m KCl are mixed together? for AgCl, ksp=1.8x10^-10, for Ag(S2O3)2^3-, Kf =2.9x10^13. !

  14. chem

    Calculate the amount of heat required to convert 17.5g of ice at -33.5∘C to steam at 100.0∘C.

  15. Algebra

    Suppose that y varies inversely with x, and y = 0.2 when x = 2. What is an equation for the inverse variation? y = 1.8x y = 0.4/x x = y/1.8 y = x/0.4

  16. *math (6)

    The quantity demanded x (in units of a hundred) of the Mikado miniature cameras per week is related to the unit price p (in dollars) by p = −0.2x^2 + 220 and the quantity x (in units of a hundred) that the supplier is willing to make available in the

  17. Trigonometry

    The Leaning Tower of Pisa in Italy leans because it was built on unstable soil—a mixture of clay, sand, and water. The tower is approximately 58.36 meters tall from its foundation (see figure). The top of the tower leans about 5.45 meters off center. Use

  18. science


  19. statistics

    Data were collected on 100 students regarding their class and major. The data are summarized in the following contingency table. What is the probability of randomly selecting a sophomore or an undeclared student?

  20. Physcs

    A pilot is flying from City A to City B which is 300 km [NW]. If the plane will encounter a constant wind of 80 km/h from the north and the schedule insists that he complete his trip in 0.75 h, what air speed and heading should the plane have?

  21. math

    Your organization is holding a pizza party. A group of 24 women eat es031-1.jpg slices each and 20 men eat es031-2.jpg slices each. How much would you have to spend to feed the group 8-slice pizzas costing $11.99 each?

  22. physics

    In Figure 20.2 is a velocity selector that can be used to measure the speed of a charged particle. A beam of particles is directed along the axis of the instrument. A parallel plate capacitor sets up an electric field E which is oriented perpendicular to a

  23. Math

    In the diagram, a building casts a 20-ft shadow and a flagpole casts a 7-ft shadow. If the flagpole is 12 ft tall, how high is the building? Round to the nearest tenth.

  24. math

    which is larger .007 or .700

  25. math

    A plane P cuts a sphere O in a circle that has a diameter of 20. If the diameter of the sphere is 30 how far is the plane from O?

  26. algebra

    Perform the indicated operation. x/2+y/3-z/4

  27. math

    The area of a triangle whose legs are in the ratio of 2:3 is 48. The length of the hypotenuse is a. square root 13 b. 8 c. 2 square root 52 d. 12 e. 208 please answer and explain

  28. Language Arts

    Please check answers! Choose the type of punctuation that is missing from the following sentence It's no wonder that Mark is tired after staying up all night. A. APOSTROPHE **** B. SEMICOLON C. COLON D. HYPHEN Can't you just see the look on his face when

  29. Algebra

    7(√6/32) I came until 7(√192/32). How do I proceed from here?

  30. geometry

    The volume of a cone is 180cm^3 , if the radius and the height are 3 times more, what would be the volume ???

  31. History8

    Lincoln best demonstrated the qualities of the Republican Party in that ___________________ . a.he supported Congress’ decision in the Dred Scott Case b.he believed that blacks and slaves were equal to whites c.he supported secession by the Southern

  32. programming

    Using Dynamic memory allocation demonstrate how to resize an array of integers in c++

  33. social studies

    What major land form and body of water cover much of northern south america?

  34. geometry

    Im sorry i know you just answered this but can you go a little in depth like im very confused right now "The volume of a cone is 180cm^3 , if the radius and the height are 3 times more, what would be the volume ???"

  35. geometry

    In a arcade game, the "monster" is the shaded sector of a circle of radius 1 cm, as shown in the figure. The missing piece (the mouth) has a central angle of 60 degrees. What is the area of the monster in cm^2

  36. math

    Square ABCD is incribed in Circle O. If the side of the square is 2 find the area of Circle O. a. pi b. 2 pi c. 4 pi d. 8 pi e. 16 pi please answer and explain

  37. math

    sweets are shared equally among 20 children at a party. if there were 1 more sweet and 1 more child, each child would get 1 sweet less. how sweets were shared at the party? thats how the question ends.

  38. *math (1)

    The demand function for a certain make of replacement cartridges for a water purifier is given by the following equation where p is the unit price in dollars and x is the quantity demanded each week, measured in units of a thousand. p = -0.01x^2 - 0.1 x +

  39. math

    an unbiased coin is tossed six times. find the probability of the given event. the coin lands heads more than once.

  40. calculus help

    A particle is moving with the given data. Find the position of the particle. a(t)= (t^2 - 5t +7) , s(0)=0 , s(1)=20 Thanks!

  41. World History

    1.Greek and Roman legacies to the modern world include contributions to modern law and government. Briefly describe how modern law and government have been influenced by classical Greece and Rome. Include at least two examples from the Greeks and two

  42. Chemistry URGENT/DR BOB

    Can someone may sure that I balanced the following groups of equations correctly. Write an equation to show how acetic acid reacts with water to produce ions in solution. C2H4O2 + H2O >>>>>>> H3O + C2H3O Write an equation for the neutralization of HCl and


    The spring in the figure has a spring constant of 1000 N/ m. After being compressed by 15 cm it launches a 200 g block out onto a frictionless horizontal surface. The block then moves up an incline, where the coefficient of friction is 0.20, eventually

  44. Probability

    For each of the following sequences, determine the value to which it converges in probability. (a) Let X1,X2,… be independent continuous random variables, each uniformly distributed between −1 and 1. Let Ui=X1+X2+⋯+Xii,i=1,2,…. What value does the

  45. Algebra

    (-1/3)√18c^5 * (-6√8c^9) 2√144c^14 ---> I came until here but then didn't know how to proceed.

  46. math

    A rectangle has side lengths of 5 centimeters and 3 centimeters. if the side lengths are doubled, will the area also doubal? Explain


    Find the equation of the circle with radius 1 and center C(1, -2). Then sketch its graph. AND... Sketch a graph of the circle given by the equation. (x + 6)2 + (y – 4)2 = 16

  48. physics

    The pressure at the bottom of a cylindrical container with a cross-sectional area of 46.5 cm2 and holding a fluid of density 480 kg/m3 is 115 kPa. (a) Determine the depth of the fluid. (b) Determine the pressure at the bottom of the container if an

  49. Math Help? Check my answers.

    1. Find the next three terms in the sequence. 30, 22, 14, 6, ... -3, -12, -21 -1, -8, -15** -1, -2, 3, -2, -10, -18 2. Find the next three terms in the sequence. 3, 6, 9, 12, ... 15, 18, 20 15, 19, 20 15, 18, 21 14, 18, 21** 3. Find the next three terms in

  50. geometry

    name a pair of obtuse adjacent angles

  51. physics

    a great amount of water vapor changes phase to become liquid water droplets in the clouds that form a thunder storm. Does this phase change release or absorb energy?

  52. Stats.

    Another one that I need help.... At Ajax Spring Water, a half-liter bottle of soft drink is supposed to contain a mean of 520 ml. The filling process follows a normal distribution with a known process standard deviation of 4 ml. (a) Which sampling

  53. Physics

    A golf ball, mass 0.048 kg, rests on a tee. It is struck by a golf club with an effective mass of 0.225 kg and a speed of 44 m/s. Assuming the collision is elastic, find the speed of the ball when it leaves the tee (remember: you can not assume the club is

  54. Math

    The Leaning Tower of Pisa in Italy leans because it was built on unstable soil—a mixture of clay, sand, and water. The tower is approximately 58.36 meters tall from its foundation (see figure). The top of the tower leans about 5.45 meters off center. Use

  55. Chemistry URGENT/DR BOB

    Hello Dr. Bob I have been sick and missed some of my classes and my classmates want to act stupid. So if its not too much trouble could you just make sure that I am on the right track and let me know what is wrong and how I can fix them. I have a lot of

  56. Math

    Jabari is thinking of three numbers. The greatest number is twice as big as the least number. The middle number is three more than the least number. The sum of the three numbers is 75. Find the numbers.

  57. Math: Compass Bearings

    two people start walking from the same point. Person A walks due east for 3.5 km and the person B walks in the direction 123 degrees until they are due south of person A. How far did the second person walk?

  58. programming

    in c++ how is memory allocated on the heap

  59. math

    I am an interger greater than 0 and less than 100. I am a multiple of 3 The sum of my digits is a multiple of 9 Show all work and explain how you obtained your answer.

  60. programming

    How can memory leak occur in c++

  61. programming

    Explain the term "dynamic memory allocation" in C++? Please explain it in such a way i will understand it

  62. Geometry

    Sandy decides to try golfing. She stands on the outer edge of a circular putting green. In the very center of this putting green is the hole;it is 8m away from where she is standing. Sandy is inexperienced. She hits the ball incorrectly and it veers

  63. geometry

    3 times the complement of an angle is 30 more than the supplement of the original angle. What is the measure of the angle?

  64. maths

    It wil be greatful if u help me in solving these problems: 1.)The number of solutions of x + [x] = 2013, where [x] is greatest integer less than or equal to x, is

  65. accounting

    If you can earn 4 percent, how much will you have to save each year if you want to retire in 35 years with $ 1 million?

  66. statistics (4)

    For a t distribution with 16 degrees of freedom, find the area, or probability, in each region. a. To the right of 2.120. (Use 3 decimals.)

  67. statistics (6)

    The International Air Transport Association surveys business travelers to develop quality ratings for transatlantic gateway airports. The maximum possible rating is 10. Suppose a simple random sample of 50 business travelers is selected and each traveler

  68. Physics

    A small plane can travel at 200 km/h in still air. If a 50.0 km/h wind is coming from the east, determine the ground velocity of the plane if the pilot keeps the plane pointed [N].

  69. physics

    ssume all temperatures to be exact. A 0.240-kg coffee cup at 27∘C is filled with 0.200kg of brewed coffee at 96∘C. The cup and the coffee come to thermal equilibrium at 84∘C. Part A If no heat is lost to the environment, what is the specific heat of

  70. maths

    1.)The complete solution set of √x-2 < 2 is ? 2.)The area of the region bounded by √x^2 + √y^2= 1 is ½ sq. units

  71. algebra

    Gabby walks 12 blocks east from school and then 16 blocks south and each block is 50 yards how far is Gabby from school in yards?

  72. Algebra Work Check

    1. 5√6 * 1/6√216 5/6 * √1296 5/6 * √144 * √9 = 30 2. -9√28a^2 * 1/3√63a -3√1764a^3 -3√49a^2 * √36a -3*7a*6√a = -126a√a

  73. statistics (7)

    The average cost per night of a hotel room in New York City is $273 (SmartMoney, March 2009). Assume this estimate is based on a sample of 45 hotels and that the sample standard deviation is $65. a. With 95% confidence, what is the margin of error (to 2

  74. math

    Please help me with this one, I am stymied! ; Does weight + height affect force? Please explain!

  75. History8

    In 1861, the boundary between the Union and the Confederacy ran from where to where?

  76. science!

    Does weight + height affect force? Please explain!! I am doing this to explain for mg science essay! I will furthermore add on to the current info.

  77. Math

    (6/7c)^2 Is this 6/7c^2?

  78. trig

    if the balloon is currently floating 60 feet in the air (measure from the bottom of the basket) , what is the approximate angle of depression of the person in the basket?

  79. Biology help

    How does a gene determine a trait?

  80. letter

    How can I write a feel better letter to Miley Cyrus? please help and give me so examples please help

  81. geometry

    A cross-section of a sphere (when cut by a plane through its center) is a circle of area 100pi cm^2 what is the surface area of the sphere ?

  82. ch

    A 0.160-g sample of unknown metal (X) reacts with hydrochloric acid to produce 66.5 mL? Help please

  83. Math

    A triangular piece of land has a base of 12 yards and a height of 16 yards.what is the area of the piece of land?

  84. physics

    Gamma rays (γ-rays) are high-energy photons. In a certain nuclear reaction, a γ-ray of energy 0.306 MeV (million electronvolts) is produced. Compute the frequency of such a photon

  85. Math

    A sidewalk borders a rectangular play area.the play area measures 20ft by14ft.the width of the sidewalk is 2 ft.what is the perimeter of the outside borders of the sidewalk?

  86. physics

    (a) A hydrogen atom has its electron in the n = 5 level. The radius of the electron's orbit in the Bohr model is 1.323 nm. Find the de Broglie wavelength of the electron under these circumstances. (b) What is the momentum, mv, of the electron in its orbit?

  87. Math

    Can you guess my number? The number is less than 30. The sum of the digits is 10. The number is even. What number am I?

  88. Science

    Is Dilithium real and what can it be used for. should i go find it this cuz it is close to me.I found Dilithium unused on a craiglist ad.

  89. Math - Urgent!

    Can you show that you can share a square pizza equally between two people by cutting it four times using vertical, horizontal and diagonal (45 degree cuts) through any point inside the square? If you could give an explanation as well as an answer I'd be

  90. math (8)

    Find the area of the region enclosed by these graphs and the vertical lines x = 3 and x = 5 f(x)=x^2+5 g(x)=1

  91. math (9)

    Find the area of the region enclosed by these graphs and the vertical lines x = 0 and x = 3 f(x)=-x^2+2x+4 g(x)=-x+4

  92. constructions

    explain how to construct the legs of the ironing board to ensure that the surface is always parallel to the floor

  93. Math (6)

    Find the area of the following two curves. y= sqrt(x) y= x-2

  94. English 30

    How does the short story "Happy Event" by Nadine Gordimer relate to the impact of an individual's ambition on self and others?

  95. math (2)

    Find the area of the shaded region y= 2x/(x^2+4) from x= -1 and x= 1

  96. Math

    You pay 3.3 cents per minute for long-distance phone calls on your phone. Your phone bill is $3.40. Write and solve an equation to find the number of minutes m of long-distance calls you made. A. ; 103 minutes B. ; 11 minutes C. ; 83 minutes D. ; 10

  97. math (4)

    Sketch the graph (Do this on paper. Your teacher may ask you to turn in this graph.) and find the area of the region bounded below by the graph of the function and above by the x axis from x = 0 to x = 1. f(x) = -xe^(-x^2) x=0 x=1

  98. Math

    (-1/3)√18c^5 * (-6√8c^9) 2√144c^14 ---> I came until here but then didn't know how to proceed.

  99. Math (3)

    Find the area of the shaded region. the following curves are; y=x^3 y=x+6 y=-1/2x

  100. math

    A diver is wroking 30 meters below sea level. Another diver is taking a break on a platform directly above him that is 5 meters above sea level.How far apart are the two divers? a. 5 meters b. 25 meters c. 35 meters d. 40 meters please answer and explain

  101. *math (2)

    The demand function for a certain brand of CD is given by p = −0.01x^2 − 0.2x + 10 where p is the wholesale unit price in dollars and x is the quantity demanded each week, measured in units of a thousand. Determine the consumers' surplus if the market

  102. math

    Tricia wants to create a path out of pebbles. She has 8 bags of pebbles and each bag covers an area of about 6 square feet. If she wants to make the path 2 feet wide, about how long can she make the path ? Show your work

  103. *math (3)

    A supplier of portable hair dryers will make x hundred units of hair dryers available in the market when the unit price is p = 324 + 4x dollars. Determine the producers' surplus if the market price is set at $22/unit. (Round your answer to two decimal

  104. Algebra

    7(√6/32) I did: 7(√6/32) * (√32/√32) 7(√192/32) ...but then what?

  105. *math (4)

    The demand function for a certain brand of CD is given by p = −0.01x^2 − 0.2x + 12 where p is the unit price in dollars and x is the quantity demanded each week, measured in units of a thousand. The supply function is given by p = 0.01x^2 + 0.5x + 3

  106. *math (5)

    The management of the Titan Tire Company has determined that the quantity demanded x of their Super Titan tires/week is related to the unit price p by the relation p = 160 − x^2 where p is measured in dollars and x is measured in units of a thousand.

  107. Math

    A rectangular backyard measures 15 meters by 20 meters.there is a square flower bed in the middle of the yard with three sides of 3 meters.what is the area of the yard only?

  108. Algebra 2

    if an object is thrown vertically upward with an initial velocity of v from an original position of s, the height h at any time t is given by: h=-16t^2+vt+s (where h and s are in ft t is in seconds and v is in ft/sec) If a rock is thrown upward from a

  109. math

    Kyle reduced his investment in Collins Company from $11,700 to $4,300. What was the percentage rate of decrease?

  110. Chemistry

    A 0.160-g sample of unknown metal (X) reacts with hydrochloric acid to produce 66.5 mL of "wet" gas at 20 °C and 754 mm Hg. What is the unknown metal (X)? (The vapor pressure of water at 20 °C is 18 mm Hg. Help please?

  111. math!!

    Roy Landers bought 3,000 shares of stock for $59 per share. Six months later he sold the 3,000 shares of stock for $75 per share. If the stockbroker's commission was $975, how much profit did Roy make on the transaction?

  112. Math

    An electronics store usually sells 18 remote control devices per week at a retail price of $12.49. This week the manager put the remotes on sale for a markdown of 20%, and sold 25 of them. How much more revenue was earned this week by having the sale?

  113. History

    Both Hitler and Churchill were gifted orators. Compare their styles. I was thinking something like that they both used nationalism to make themselves popular within the people. And they spoke to create nationalism in their country. Does this make sense and

  114. physics

    Three resistors, each of resistance 6 Ω, are connected in such a way that that they form the three sides of a triangle. What is the equivalent resistance between any two vertices of the triangle?

  115. math

    Greg and Verena both work for the Spelling Company. Greg earns $18.60 per hour as an assembler, and Verena earns $12.20 per hour as a technician. Last week Greg worked es031-1.jpg hours and Verena worked es031-2.jpg hours. What was their combined earnings

  116. science

    A bat moving at 5.6 m/s is chasing a flying insect. The bat emits a 60 kHz chirp and receives back an echo at 60.63 kHz. At what speed is the bat gaining on its prey? Take the speed of sound in air to be 338 m/s. Answer in units of m/s

  117. math

    a-x=1 b+1=x ab=? a. x^2-1 b. x^2 c. (x+1)^2 d. (x-1)^2 e. X^2+1 I don't know how to do it, any body can answer this question and step by step tell me how to do it, thank you

  118. History

    Mark the statement if it describes Roman society during the time of Cincinnatus. A. Rome’s government was based on law in which many people had a voice. B. Rome was being surrounded and threatened by outside forces. C. People in Rome admired those who

  119. biology

    The agricultural research facility during a research accidentally changed the DNA sequence of a wheat plant from GCCATGTT to GCGTACTT and this mutation resulted in a stronger plant variety. What kind of mutation did the plant undergo?

  120. math, calculus

    1. Consider the region bounded by the curves y=|x^2+x-12|, x=-5, and x=5 and the x-axis. A. Set up a sum of integrals, not containing an absolute value symbol, that can be used to find the area of this region. B. Find the area of the region by using your

  121. physics

    a cylinder with movable piston contains 40 moles of an ideal gas it is placed in an ice water bath where it reach thermal equilibrium. it is then compressed slowly with 7500 j of work done to compress it to a smaller volume. how much does its internal

  122. Radioactivity

    If you were trying to design the most effective nuclear fission reactor possible, what ratio of U-235 to U-238 would you want? Explain why What happens to the reaction as the proportion of U-238 nuclei increases? Explain why this happens.

  123. math

    Wyatt earned $316.50 each week for the first 3 weeks of February and $425.25 the last week of February. How much money did Wyatt earn in all in February ?

  124. Math

    Next year Geoff hopes to be able to run 5 mi in 1/2 his previous time.How long should it take him to run 5 mi?

  125. math

    Wyatt used $1,024.87 to pay bills and spent $89.35 to buy a new coat. He put the rest of the money into his savings account. How much money did Wyatt put into his savings account?

  126. math


  127. Statistics

    Prof. C is studying a population of the elementary school pupils in a school district with data on all its children. Another prof. suggests he calculate a confidence interval to estimate the mean age of the children. Prof C responds that it is not

  128. math

    An item originally cost $16.95 and is on sale or 22%. Find the cost of the item. Explain each step

  129. math

    the sum of an integer and the next greater integer is at least 27. find the lesser integer.

  130. trig

    16cos(x)-3sec(x)=0 Find all solutions for x in [0, 2pi)

  131. math

    In triangle ABC, AF and CE meetin D. If AE=EB, BF=FC, then AD x CD/DF x DE equals a. 1 b. 2 c. 4 d. 6 e. 8 please answer and explain

  132. calculus help

    Find f. f'(x) = 9/(square root of (1-x^2)) , f(1/2) = 1 f(x) = ??????

  133. Statistics and probability

    a sample of 500 drivers was asked whether or not they speed while driving. The following table gives a two-way classification: speed Never Speed totals male 222 78 300 female 128 72 200 totals 350 150 500 We wish to test whether gender and speeding are

  134. science

    If Two bodies of same mass is thrown from top of a tower with same speed (x) is thrown vertically downward and another(y) is thrown horizontally then what will happen?

  135. internet

    Consider sending a series of packets from a sending host to a receiving host over a fixed route. List the delay components in the end-to-end delay for a single packet. Which of these delays are constant and which are variable?

  136. Math

    Simplify the product. -9 sqrt 28a^2 * 1/3 sqrt 63a I came until -3 sqrt 49a^2 * sqrt 36a, but then I got confused...

  137. internet

    What are the causes of packet jitter?

  138. science-chemistry

    We performed a titration with NaOH solution with KHP. Now I need to calculate the average molarity of NaOH based on this data Weight of khp= 0.1083 g Volume of naoh = 6.4 ml Then if i get this how do i get the molarity of ch3cooh totrated in naoh with the

  139. internet

    What method at the application layer can be used to reduce the effects of jitter?

  140. chemistry urgent

    I think I balanced these equation right please check and let me know. i am suppose to complete and balance the equations representing the reactions. NaHCO3 (s) + HCL (aq) >>>> NaCl + 2CO+H2O CaCo3 (s) + HCL (aq)>>> CaCl + CO3H Thanks

  141. internet

    Explain the difference between the operation of virtual-circuit networks and datagram networks by listing the advantages and disadvantages of each.

  142. Ap Physics

    An escalator in a shopping centre carries people up through a height h at a vertical speed of v, but you’re in a hurry when you step onto it, so you climb the moving steps (each with a height of hs) at a rate of n steps/s. Determine: the amount of

  143. chemistry

    Lactic acid, CH 3 CHOHCO 2 H, is found in sour milk, in sauerkraut, and in muscles after activity. K a for lactic acid = 1.4 x 10 -4 . a. If 2.75 g of NaCH 3 CHOHCO 2 , sodium lactate, is added to 5.00 x 10 2 mL of 0.100 M lactic acid, what is the pH of

  144. English

    He has been on the go. ---------------------- Instead of 'on the go', what other expressions can we use to have the same meaning?

  145. science

    an aircraft travelling at 600km/hr accelerates steadily at 10 km /h every second. Assuming speed of sound is 100 km /h t the aircrafts altitude , how long will it take to reach the sound barrier

  146. Probability

    Let X be a continuous random variable. We know that it takes values between 0 and 3, but we do not know its distribution or its mean and variance. We are interested in estimating the mean of X, which we denote by h. We will use 1.5 as a conservative value

  147. maths

    Experience in investigating insurance claims shows that the average cost to process a claim is approximately normally distributed with a mean of 80 dollars. New cost-cutting measures were started and a sample of 25 claims was tested. The sample mean of the

  148. Probability

    For any given flight, an airline tries to sell as many tickets as possible. Suppose that on average, 10% of ticket holders fail to show up, all independent of one another. Knowing this, an airline will sell more tickets than there are seats available

  149. 6th grade math

    Elisa is writing an algebraic expression for the phrase 5 less tan a number.

  150. Math

    In what shape are lateral faces of a pyramid?

  151. Science

    We just learned about mitosis and my teacher is giving a test over it and other things tomorrow. We have to write the mitosis steps in order, label the chomatids, nuclear membrane, spindle fibers, and centrioles, and have a sentence describing them. How

  152. Buddo. Chemistry

    when excess dilute sulphuric acid was added to coppper II oxide

  153. Physics

    Jack is driving with a pail of water along a straight pathway at a steady 25 m/s when he passes Jill who is parked in her minivan waiting for him. When Jack is beside Jill, she begins accelerating at the rate of 4.0 × 10−3 m/s2 in the same direction


    Which of the following forms when igneous rocks are weathered and eroded? (1 point) igneous rock sediment sedimentary rock metamorphic rock is it sediment or sedimentary rock!!???

  155. Math

    How do you simplify this problem? (x + 4y − 5z) − (x − 3y + 6z)

  156. chemistry

    A sample of helium at 20 °C occupies a volume of 3.63 L at a pressure of 3.07 atm. What volume does this helium sample occupy if the pressure is reduced to 2.43 atm while maintaining the temperature at 20 °C?

  157. Algebra

    I would appreciate the steps to the answer please... Suppose that y varies inversely with x, and y = 6 when x = 8. What is an equation for the inverse variation? • y = x/48 • y = 2x • x = y/2 • y = 48/x

  158. History

    Can someone please help me? Thanks Select one way World War II changed the roles of women or blacks in the United States and South Carolina. Explain the change you selected. Provide examples of how these events changed South Carolina’s society.

  159. physics

    Assume that the dots in the painting are separated by 1.0 mm and that the wavelength of the light is vacuum= 500 nm. Find the distance at which the dots can just be resolved by (a) the eye and (b) the camera. I know that the resolving equation is

  160. U.S. History

    was hitler a political or military leader

  161. Chemistry

    A solution has a pH of 2. How does the pH change if 1 mL of the solution is diluted to 100 mL with pure water? How does the pH of a solution with pH 10 change under the same dilution?

  162. Chemistry

    How many grams of acetic anhydride are needed to react with 3.82g of salicylic acid?

  163. social studies

    PLEASE CHECK 1. what was one immediate effect of the Cold War on South Carolina and the nation? a. travel for pleasure was drastically reduced b. it was more difficult to obtain goods from foreign countries* c. the united states and germany continued to be

  164. math

    Uniform rod AB with end B resting against rough vertical wall. Coefficient of friction between wall and rod is μ. Rod is 2m long and has mass 3kg. Rod is kept in limiting equilibrium by a light inextensible string, one end of which is attached to the end

  165. physics

    a certain hamornic motion has amplitude of 0.7m and a period of 1.3s.find(a)the frequency of oscillation(b)the maximum velocity(c)the maximum acceleration

  166. physics

    The planet Jupiter has a satellite, Io, which travels in an orbit of radius 4.220×108 m with a period of 1.77 days. Calculate the mass of Jupiter from this information.

  167. maths

    The heights of 40 student in a class to the nearest centimer are as followsy

  168. math

    find the inverse of the function, f(x)=x-1

  169. physics

    explain why we sweat when it is hot? How does it help us? In terms of heat and temperature what happens

  170. physics

    A mass attached to a spring oscillates with a period of 3.04 s. If the mass starts from rest at x = 0.0420 m and time t = 0, where is it at time t = 2.75 s?

  171. Stats.

    I don't know where to begin with this one.... When told that over a 10-year period a mammogram test has a false positive rate of 50 percent, Bob said "That means that about half the women tested actually have no cancer". Correct Bob's mistaken

  172. English

    Traditional African marriage is an advantage for men only,not women

  173. science

    A 2kg box is suspended from the ceiling by a rope that weighs 1kg.find the tension at the top of the rope?

  174. maths

    A person runs 5/8 for race calculate what fraction is left show calculation

  175. Maths

    Determine the eigenvalues of the following matrix ( −4 1 −3 0 8 2 0 0 7 )

  176. Maths

    Reduce the matrix ( −4 1 0 6 1 0 −1 3 0 −3 6 9)

  177. English Help Please!!! Check!!

    Concision Rewrite the sentences using concision techniques (replacing phrases with words, combining sentences, etc.) discussed in class to simply these wordy sentences. a)Your explanation concerning your comatose state during the required reporting period

  178. Math

    A regular hexagon with a perimeter of 24 meters is dilated by a scale factor of 5 2 to create a new hexagon. What is the perimeter of the new hexagon?

  179. science 1 question

    4. How are ocean trenches formed? (1 point) Ocean trenches are formed when oceanic plate cools and moves to the surface of the ocean. Ocean trenches are formed when the denser oceanic plate sinks.*** Ocean trenches are formed when molten rock cools and

  180. Algebra II

    Please help me out with this The numbers 1 through 50 are written with red marker on slips of paper while the numbers 51 through 100 are written with blue marker on slips of paper. All the papers are put into a bag and shuffled. One card is randomly

  181. algebra

    Can someone explain, showing steps, why this wouldn't have a solution? 12/(x^2+9) + 3/(x+3) = 2/(x-3) Thanks. :)

  182. Math 70

    At a county fair, an adult ticket sold for $6.00, a senior citizen’s ticket for $4.50, and a child’s ticket for $2.00. On Friday, the number of adults and senior citizen’s tickets sold was 5 more than the number of children’s tickets sold. The

  183. language arts3rd grade

    difference between noun, pronoun and propernoun how it is used

  184. finance

    $11,000, invested for 9 years at 3% compounded quarterly.

  185. computer science

    IHow do you refractor this: public class Employee { private boolean isPartTime; private int seniority; private int monthsDisabled; public Employee(boolean isPartTime, int seniority, int monthsDisabled) { this.isPartTime = isPartTime; this.seniority =

  186. math

    When the population of a town rose from a million to a + x million, the per cent increase was a. x/a % b. 100a/x % c. 100x/x-a % d. x/a-x % e. 100x/a % please answer and explain

  187. algebra

    sqrt(3x+4) + 4 = 2x can you solve this with steps to help me please?

  188. math

    Mrs walkers ordered 10 pizza's for a party . Each pizza is cut into 8 slices the list below show the fraction of each pizza that was left after the party. 3/8,4/8,4/8,5/8,6/8,7/8,2/8,4/8,5/,3/8 1.Make a line plot of the fractions of pizzas that were left.

  189. Chemistry URGENT/DR BOB

    I have a couple of unfinished experiments i need help with as well. If you can help me. Thanking you in advance. If I tested the ph of NaOH and its H+ was 12.2 how would I express this in a power of 10? I really have no clue. Need help.

  190. DNA

    Do the two DNA double helices following DNA replication have the same, or a different, composition?

  191. Algebra II

    help please There are 12 red checkers and 3 black checkers in a bag. Checkers are selected one at a time, with replacement. Each time, the color of the checker is recorded. Find the probability of selecting a red checker exactly 7 times in 10 selections.

  192. math

    how much is 8 liters jug water he fills 9750 millimeters pitchers with water how much water is left?

  193. ALG> and graphs

    I have no idea how to do this Find the equation of the circle that passes through the point P(8, -2) and whose center is the point C(4, 1). Then sketch its graph

  194. maths

    next year Geoff hopes to be able to run 5 mi in 1/2 his previous time how long should it take him to run 5 mi

  195. grammar

    One swallow do not make a summer. what is it mean?

  196. social studies

    What do people in Catalonia celebrate every April 23rd?

  197. 3rd grade math

    Sven is thinking of two numbers. The sum is 12. The difference is 4. What are the two numbers?

  198. math

    what is the distributive property of 15 x 3 1/5

  199. Algebra II

    am i correct? 1(2x)^3 + 3(2x)^2*(-5y)^1 + 3(2x)^1*(-5y)^2 + 1(-5y)^3 answer (2x-5y)^3

  200. government

    These are the federal government financial instruments such as bonds notes certificates? Answer Are Securities Discount Rates Uncontrollable Thank you

  201. physics

    Three tug boats are pulling on a cruise ship with three ropes. Two pull with a force of 1800 N each at angle of [N15°E] and [S24°E]. If the net force on the ship is zero, what must the tension in the third rope be?

  202. english

    places in his life conflicts in his life men in his life can it be his father? people he worked with etc mistakes he made victories he celebrated having kids publishing his poetry/plays elizabethan cultures and traditions that influenced his life and

  203. Circle geometry

    The endpoints of the arms of an inscribed angle are the endpoints of a diameter. What is the measure of the inscribed angle? How do you know? Please help and please explain how I would draw a diagram of thus. Think you for your help!

  204. Math

    List the following numbers from greatest to least; 3/8 , 2/9 , 5/16

  205. physics

    Calculate the energy in kcal used by a 53-kg woman who does 55 deep knee bends in which her center of mass is lowered and raised 0.400 m. (She does work in both directions.) You may assume her efficiency is 20%.

  206. Physics

    Could you explain these in a very easy term that I could understand, give the definitions of the 3 thing below Static Friction Dynamic Friction Rolling Friction

  207. Physics

    could you explain friction in a very easy term please

  208. Math

    Earl Watkins is ready to retire and has saved up $250,000 for that purpose. He places all of this money into an account which will pay him annual payments for 20 years. How large will these annual payments be if the account earns 17% compounded annually?

  209. Math

    When you return hone, you have $30 in your pocket. If the movie costs $8.00 and the pizza costs you $6.00, which equation could you use to determine how much money you had at the beginning of the day?

  210. Math

    Tim deposits $10 every month into retirement account which averages 18% interest compounded monthly. How much will be in this account after 45 years? (The number of years from age 20 to 65).

  211. math

    How do you find the sum of the mode from each set of data? Set A: ( 4,9,7,2,4 ) Set B: ( 11,6,4,6,2 ) Set C: ( -3,2,9,-3,-3)

  212. Math ~ Check Answers ~

    A number cube with the numbers 1 through 6 is rolled. Find P (number is greater than or equal to 3). a.) 4/6 b.) 1/6 c.) 2/6********** d.) 5/6

  213. math

    The stadium has a maximum seating capacity of 19,968 at an NBA game. If the New Jersey Nets play 41 games there and each game is sold out, what is the best estimate for the number of fans attending the games during the regular season?

  214. math

    How to find the interst rate on an investment of 3000 after four years received 4105.71. What is the interest rate

  215. maths,science and gengraphy

    what are the impacts and consequences of xenophobia

  216. physics

    A proton moves in a circular path perpendicular to a constant magnetuc field. If the field strengrh of the magnet is increased, does the diameter of the circular path incresse, decrease, or remain the same?

  217. analytical techniques

    If V2-10ml,N1-0.092*10 to the power of 6 and N2-0.5*10 to the power of 6,V2-?

  218. physics

    A 225-kg box is pushed horizontally with a force of 620N. If the coefficient of friction is 0.20, calculate the acceleration of the box.

  219. maths

    a cartoon can hold 1,000 unit cubes that measure 1 inch by 1 inch by 1 inch describe the dimension of the cartoon using unit cubes

  220. science 1 question

    7. What is the force that results from a 3,000 kg car accelerating at 20.00 m/s2? (1 point) 150.0 N 3,000 N 3,020 N 60,000 N

  221. english

    theater in london that stands near where globe theatre once stood