Questions Asked on
November 23, 2016

  1. English-change the sentences into passive voice

    1.Rita is writing a story. 2.I was buying vegetables. 3.seema was eating apples. 4. The family was watching a cricket match.

  2. science

    parasitic worm infestation is hypothesized to be damaging to the host. However scientists have recently discovered that worm infestation of certain autoimmune disorders. in which of the following ways should the hypothesized to be modified , given the new

  3. vertical motion physics

    a body projected vertically up from ground crosses a point Pafter 4 seconds and again after 6 seconds Maximum height reached by that body above the ground is (g=10m/s)

  4. Analytical chemistry

    Calculate the expected concentrations of vitamin B6 and caffeine in the stock solution assuming exactly 0.0506 g of pyridoxine hydrochloride (vitamin B6) and 0.1253 g of caffeine are dissolved in a 100 mL volumetric flask.

  5. math

    the perimeter of a farm is187.2m .if its width is 39m,then find the ratio between its length and width.

  6. Gaussian Elimination Method

    Write the system of equations as an augmented matrix. Then solve for x and y. 5x-4y=12 -5x+3y=9

  7. physics

    A boy has a mass 40kg and a girl of mass 30kg play on a see-saw, where must the girl sit to make it balance?

  8. Language Arts

    Which sentence use coordinate adjectives? A. Talia wore a pink, striped shirt.*** B. Talia wore a shirt, shorts, and shoes. C. Talia wore a pink shirt with stripes. D. Talia wore a pink shirt and shorts yesterday.

  9. The Graphical Method

    A manufacturer produces two models of mountain bikes. Model A requires 5 hours of assembly time and 2 hours of painting time, and Model B requires 4 hours of assembly time and 3 hours of painting time. The maximum total weekly hours available in the

  10. maths

    If the ninety term of an A.P is 30, find the Sum of its first seventeen terms

  11. physics

    Find the gravitational force of attraction between two balls each weighing 10 kg,when placed at a distance of 1 meter apart

  12. English

    Unit 4 Lesson 4: Writing Workshop: Compare & contrast essay I have to compare Nethergrave with something that's science fiction, from a book, movie, or even a video game... Any ideas what I should compare Nethergrave with?

  13. Algebra 2 (Please help Ms. Sue!)

    Use the Remainder Theorem to find the remainder when P(x)=x^4-9x^3-5x^2-3x+4 is divided by x+3. How do I do this?

  14. Further mathematics

    Given that x squared + y squared = 5xy,show that; (a) 2log(x+y\√7)=log x + log y. (b). Log ( x- y\√3) = 1\2( log x + log y)

  15. math

    I think of a number,multiply it by 3 and add 7.i get the Same answer if I multiply the number by 4 and subtract 12.find the number

  16. calculus

    Find the domain of the vector-valued function. r(t) = sin ti + 4 costj + tk plz help me working

  17. Consider the linear programming problem

    A farmer has a field of 70 acres in which he plants potatoes and corn. The seed for potatoes costs $20/acre, the seed for corn costs $60/acre, and the farmer has set aside $3000 to spend on seed. The profit per acre of potatoes is $150 and the profit for

  18. Language Arts

    Which resource would be most helpful in finding a synonym for sentimental? A. a thesaurus*** B. a dictionary C. an article D. an anthology

  19. homework

    There are 13 fewer pigs than goats on the farm. There are 8 pigs. How many goats are there?

  20. simplex method

    Maximize P=60x+50y. ⎧ ⎪x+y≤80 ⎪ ⎪5x+10y≤560 ⎪ ⎪50x+20y≤1600 ⎪ ⎪x≥0 ⎨ ⎪y≥0 ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎩ Use the simplex method to solve the problem. Use s, t, and u as your slack variables for the first, second, and third

  21. Calc

    Evaluate the surface integral S F · dS for the given vector field F and the oriented surface S. In other words, find the flux of F across S. For closed surfaces, use the positive (outward) orientation. F(x, y, z) = y i − x j + z2 k S is the helicoid

  22. algebra

    A number is double of another number.If the difference of the number is twenty, find the number.

  23. Science

    A piece of wood float on water and sinks in a methylated spirits .if the density of the wood is 0.8g/cm,explain why it would float on water and sink in methylated spirits .what can you say about the methylated spirit

  24. Calc

    Evaluate the surface integral S F · dS for the given vector field F and the oriented surface S. In other words, find the flux of F across S. For closed surfaces, use the positive (outward) orientation. F(x, y, z) = xy i + yz j + zx k S is the part of the

  25. physics

    Does the kinetic energy of a car change more when it speeds up from 10 to 15 m/s or from 15 to 20 m/s? Explain.

  26. social studies

    The Athenian assembly appointed 10 generals who a. collected taxes b. led armies into battle c. carried out the assembly's law d. tried to increase trade I think its B

  27. Calculus

    An object at the origin at time t= 0 has velocity measured in meters per second, v(t) = t/30 if 0

  28. Calculus

    Find the biggest value of c that satisfy the Mean Value Theorem for integrals for f(x)= 1/(x+1)^6 on the interval [0,7]

  29. Math

    Consider ∠C such that sin C = 7/25 a) What are the possible quadrants in which ∠C may lie? b) If you know that cos C is negative, how does your answer to part a) change? c) Sketch a diagram to represent ∠C in standard position, given that the

  30. science

    Two rods of equal length and temperature at end of the rods is T1 and T2. What is the condition for equal flow of heat through them

  31. Algebra 2

    One hundred liters of a 57.84% acid solution is obtained by mixing a 75% solution with a 42% solution. How many liters of each must be used to obtain the desired mixture? A) 40 liters of 75% acid and 60 liters of 42% acid B) 53 liters of 75% acid and 47

  32. Math

    The distance between two stars is 0.009 light years. A light year is equal to 5.88 x 10^12 miles. What is the distance,in miles, between the two stars? Represent your final answer in scientific notation

  33. pre calculus

    Use the following vectors to answer the question. u: v: What is ||u||2?

  34. pre calculus

    Use the following vectors to answer the question. u: v: What is ||v||2?

  35. pre calculus

    Use the following vectors to answer the question. u: v: What is the projection of u onto v?

  36. Linear Programming

    A farmer is going to divide her 60 acre farm between two crops. Seed for crop A costs $20 per acre. Seed for crop B costs $10 per acre. The farmer can spend at most $700 on seed. If crop B brings in a profit of $60 per acre, and crop A brings in a profit

  37. chemistry

    give the name of the process when anhydrous copper sulphate becomes wet

  38. physics

    A girl uses a spanner of length 20cm to tighten a nut. IF she pulls at right angles to the end of the spanner with a force of 50N, calculate the moment of her pull

  39. Physics

    A 5 gm bulet initial velocity is 300ms-1 and after penetrating a 5cm plank then the bulet stopped . So how much time is needed to penetrate the plank..?

  40. business maths

    Susan would like to set up an endowment fund which would award a student with a scholarship of $500 at the end of each year. The scholarship will continue in perpetuity. The interest rate is 6% compounded semi-annually, and the first award is made one year

  41. English

    1. I still could not understand him. 2. I still don't understand. 3. He was still waiting for her . 4. He has still been looking for the kid. ----------------------------- Is the position of 'still' correct? Are they all acceptable in terms of grammar?

  42. Algebra 1 A

    I am a little unsure of how to answer this question: Write an inequality to represent the limit you may not exceed when spending to make your product. Here's the background information I have. You are going to decide on a summer business to start. Figure

  43. Ptofit and Loss

    If oranges are bought at $60.00 per dozen and sold at $10 each. What is the profit or loss

  44. Math

    Draw four non_collinear points on a paper and draw all possible line segments. How many line segments can be drawn.

  45. English

    Q1. Does a recipient's address mean a receiver's address? Q2. Are the following all correct? They are for the date under the sender's address? 1. 29/4/92 2. 29th March 1992 3. 29 March 1992 4. 4/29/92 5. March 29th, 1992 6. March 29, 1992 (#1,2, and 3 seem

  46. Science Physics

    An air plane flies 20 km in a direction 60 degree west of north then 40 km straight east and then 10 km in a direction 30 degree north of east . How far and at what direction is the plane from the starting point?

  47. Calc 3

    Evaluate the surface integral S F · dS for the given vector field F and the oriented surface S. In other words, find the flux of F across S. For closed surfaces, use the positive (outward) orientation. F(x, y, z) = x i + y j + z4 k S is the part of the

  48. math-IS MY ANSWER RIGHT?

    Evaluate the surface integral S F · dS for the given vector field F and the oriented surface S. In other words, find the flux of F across S. For closed surfaces, use the positive (outward) orientation. F(x, y, z) = x i + y j + z4 k S is the part of the

  49. help me plz

    Evaluate (if possible) the vector-valued function at the indicated value of t. r(t) = rt{t}i + [t^(3/2)]j + [e^(-t/4)]k at t = [9 + delta(t)] show me step plllllz

  50. Science

    Mammals whose young develop in a pouch on the mother's body are called: a.placental mammals b.monotremes c.marsupials d.gymnosperms thx

  51. Calculus

    Find the average value of the function defined by f(x)= x^2 sin 3 x^3 on the interval [0, 3rd Root (pi)]

  52. physical education

    what are the reason for the olympic games to be largest of all sporting events

  53. Calculus

    The radius of a conical tank is 2.7 meters and the height of the tank is 4.3 meters. Water is flowing into the tank at a constant rate of 59.5 m3/minute. At the instant the the depth of the water is 0.6 meters, answer the following: (A) At what rate is the

  54. Physics

    How could you use 100 pounds of force to lift a 200 pound weight? Explain precisely, listing any necessary distances and details. (This will take some converting!) I don't understand this question, could someone please help me? I think I only need the

  55. math

    Four friends contribute sums of money to a charitable organization in the ratio of 2:4:5:7. if the largest amount contributed is $1.40, calculate the total amount contributed used by the four people?

  56. Linear Programming to Maximize Profit

    Brian runs a factory that makes Blu-ray players. Each S100 takes 6 ounces of plastic and 4 ounces of metal. Each D200 requires 3 ounces of plastic and 8 ounces of metal. The factory has 300 ounces of plastic, 608 ounces of metal available, with a maximum

  57. Calculus

    find the point(s) of inflection on the function f(x)= 10x + 10/x

  58. Darwin Assumed that evolutionary change was always

    Darwin Assumed that evolutionary change was always slow and gradual.

  59. Math

    Bart and Bethany play a game. They each roll a regular 6-sided die labeled 1to 6. Use an outcome table to show all possible outcomes: (2 marks) is the total number of outcomes 12?

  60. Math

    An angle θ satisfies the relation csc θ cos θ = -1. A) Use the definition of the reciprocal trigonometric ratios to express the left side in terms of sin θ and cos θ. B) What is the relation between sin θ and cos θ for this angle? C) Determine two

  61. Calculus

    determine all asymtote(s) of f(x)= 1/(x(x-1)^2) using limits

  62. Math grade 9

    James and slyvie need to paint the line around the soccer field. To know how much paint to buy they must find out the perimeter of the field. James claims, "I can calcuate the perimeter of the field by using the formula P= 2(l+w) while slyvie says that the

  63. Physics

    A water tank is20m deep if the water barometer reads10m at that place then what is the pressure at the bottom of the tank in atmosphere

  64. English

    WHen the question asks, what is the basic premise of the environmental act. What is it asking me for, what it covers? I interpreted as what it covers but when i searched up the definition for premise, it said previous statement or base of argument. So now

  65. Physics

    A water tank is 20 metre Doon Ek Baar water barometer is estimated that Palace then what is the pressure at the bottom of the tank in atmosphere

  66. physics

    a curve along the highway is to be banked for traffic expected to move at 80km/hr. find the angle of banking if the radius of the curve is 100 meters

  67. Calc

    Use Stokes' Theorem to evaluate C F · dr where C is oriented counterclockwise as viewed from above. F(x, y, z) = xyi + 5zj + 7yk, C is the curve of intersection of the plane x + z = 8 and the cylinder x2 + y2 = 9.

  68. Calc

    Evaluate the surface integral S F · dS for the given vector field F and the oriented surface S. In other words, find the flux of F across S. For closed surfaces, use the positive (outward) orientation. F(x, y, z) = x i + y j + z4 k S is the part of the

  69. Calc

    Evaluate the surface integral S F · dS for the given vector field F and the oriented surface S. In other words, find the flux of F across S. For closed surfaces, use the positive (outward) orientation. F(x, y, z) = xy i + yz j + zx k S is the part of the

  70. Chemistry

    How would I make a 93.1% w/w solution from 96% sulfuric acid using volume

  71. Physiscs

    A 3kg bar is laying on a smooth vertical wall of 3L of height and a floor of 2L. Determine the force that the wall exerts over the bar. I have tried to get to length of the bar by using Pitagoras but no, then I tried using a free body diagram but I don't

  72. wirting

    how to use APA citing on the following phase "The movie Silver Linings Playbook"

  73. Math

    The figure is made up of two rectangles measuring 7cm by 3 and a square of side 4cm. Find the area of the figure.

  74. Find the solution to the system of equations:

    Are my answers correct? x-2y+z=1 y+2z=2 x+y+3z=3 Solution : 100 010 001 x = 0.429 y = 0.429 z = 0.714

  75. Physics

    Suppose that at least 14.7 eV is needed to free an electron from a particular element, i.e., to ionize the atom. What is the lowest frequency photon which can accomplish this? And, what is the corresponding wavelength for that photon?

  76. math

    2+3Log a

  77. Math

    A trapezium measures 9.5cm (b1) 17cm (b2) & 6cm (h). Now, divide the trapezium into a rectangle & a triangle to find their areas. Hence, find the area of the trapezium.

  78. Maths

    Calculate the total amount (loan and interest)to be paid on a loan of N1 000.00, borrowed for 2 years at a simple interest rate of 10% p.a.

  79. math!

    You have 48 minutes to take an exam of 21 questions. After you finish the first 10 questions, you realize you must answer the remaining questions twice as fast to finish the exam. How many questions per minute were you answering? Also, how many questions

  80. Algebra

    I am a little unsure of how to answer this question: Write an inequality to represent the limit you may not exceed when spending to make your product. Here's the background information I have. You are going to decide on a summer business to start. Figure

  81. algebra~help me

    18^(4-4y)=54(sqrt(2))^(3y-2) step plz help me

  82. Language Arts

    Which word in the following sentence is modified by an adverb? The baby crawled slowly toward her favorite toy. A.Crawled B.Baby C.Favorite D.Toy

  83. physics

    A stone of 400g is whirled by a string of length 2.8m so that it moves in horizontal circle of radius 0.7m.find the tension on the string.

  84. Gaussian Elimination Method

    Is my answer correct? Write the system of equations as an augmented matrix. Then solve for x and y. −4x−y=6 12x-2y=-8 Solution = -1,-2

  85. Math aglebra

    I need help RIGHT NOW!!!!!!!!!!!!!! On the blueprints of Adam's office building, the length of his rectangular office space is 5 1/4 inches. If the actual length of Adam's office space is 10 1/2 feet, what is the scale of the blueprint?

  86. pre calculus

    Given: u and v Find: (u • v)(u + v) ________________________________________

  87. Chemisty

    2C2H6(g) + 7O2(g) = 4CO2(g) + 6H2O(g) How many L of oxygen gas is needed to produce 18.0 L of CO2

  88. Language Arts

    Which word in the following sentence is a possessive pronoun? Joe's sister showed me the new puppy her family adopted. A.her*** B.Joe's C.me D.sister

  89. Math

    I am a little unsure of how to answer this question: Write an inequality to represent the limit you may not exceed when spending to make your product. Here's the background information I have. You are going to decide on a summer business to start. Figure

  90. calculus

    how do you work out what ||u||2 is when you are given u: and v:

  91. Calculus - Fundamental Thm of Calc

    Suppose F(t) is an antiderivative of t^{3}. Then F'(t)= t^3. According to the Second Fundamental Theorem of Calculus, x ∫ (t^3)dt = ??? 1 Answer using the function F

  92. Algebra 2 (Please help Ms. Sue!)

    Use synthetic division and the given factor to completely factor the polynomial. x^3-x^2-24x-36; (x-6) How do I do this?

  93. Maths

    How long will it take for prices to double if inflation rate is 6% per annum for the next 15 years

  94. system of equations

    Write the system of equations as an augmented matrix. Then solve for x and y. -4x-y=6 12x-2y=-8

  95. Maths

    Two masses are connected by a light cord over a frictionless pulley. is M1 = 8.5kg and m2 = 6.6 kg. calculate the tension in the cable (in N) . Take the coefficient of kinetic friction between M and the horizontal surface to be 0.4 and asume the

  96. Calculus - fundamental theorems

    d/dx integral e^t^2 dt from 1 to x^3 Please help. I think I'm supposed to use substitution for the x^3 and then apply the chain rule but I'm not sure how to do that.

  97. HCC

    An investment is made at 77% interest for 1 year. It grows to ​$3509.60. How much was originally invested​ (the principal)?

  98. Math

    The relationship of red ribbons to green ribbons is 10 : 1/4. How mini red ribbons are used for every 4 1/2 green ribbons?

  99. mathematics

    a survey of reading habits of 100 students showed that 30 read both comics and novels. 10 read neither comics nor novels and twice as many students read comics as read novels. 1. illustrate the information on a Venn diagram. 2. how many students read only

  100. Calculus

    If f(x) = integrate t^2 from x to x^2, then f'(x)= f'(-1)= Please help! I have no idea how to approach this.

  101. Math

    Solve the set of linear equations by the matrix method. a+3b+2c= 3, 2a-b-3c= -8, 5a+2b+c=9, solve for a

  102. Math

    The number of diagonals D I a polygon of n sides is given in the formula D=n(n-3)/2. Use the formula to find: A. The number of diagonals in a polygon with 9 sides. B. The number of sides of a polygon with 90 diafonals.

  103. English

    They are closings at the end of a letter 1. Yours sincerely 2. Sincerely 3. Sincerely yours 4. Faithfully yours 5. Faithfully 6. Truly yours 7. Truly ------------------------ I know that 'Sincerely' is used. What about #5 and #7? Can they be used as

  104. texas history

    i need help on figuring out a topic "The topic of your report must be an issue that is being addressed by both the state and federal government"

  105. Economics(pls Help)

    Zoe Goggles is a deep sea underwater photographer. Her camera and lenses are valued at $4,000. There is a chance of 1/20 that she will lose her equipment on a dive over the course of the year. Her wealth, including the value of her equipment, is $30,000.

  106. Economics(Help)

    Nancy is indifferent between a gamble that pays $625 with a probability of 20% and $100 with a probability of 80%, versus a sure payment of $269. She is also indifferent between another gamble that pays $269 with a probability of 50% and $10 with a

  107. Science

    A 8.8-kg object is moving at 5.3 m/s. A 7.4-N force is applied in the direction of motion and then removed after the object has traveled 4.7 m. The work done by this force is:

  108. English

    1. The helicopter is flying over the clouds. 2. The helicopter is flying above the clouds. ----------------------------- What is the difference between them?

  109. science

    what makes us cry while chopping the onions?

  110. English

    1. I happened to meet he on the sidewalk. 2. I chanced to meet her on the sidewalk. 3. I met her on the sidewalk by chance. 4. I met her on the sidewalk by accident. 5. I met her on the sidewalk by happen. ------------------- Are they all the same in

  111. math

    8x+9y=40 5x+3y=10

  112. Calculus

    Find all values of c that satisfy the Mean Value Theorem for integrals for f(x)= x^{2} on the interval [-3, 3]

  113. Calc

    Use Stokes' Theorem to evaluate C F · dr where C is oriented counterclockwise as viewed from above. F(x, y, z) = yzi + 9xzj + exyk, C is the circle x2 + y2 = 1, z = 3.

  114. Calc

    Use Stokes' Theorem to evaluate C F · dr where C is oriented counterclockwise as viewed from above. F(x, y, z) = xyi + 5zj + 7yk, C is the curve of intersection of the plane x + z = 8 and the cylinder x2 + y2 = 9.

  115. English

    80 Green Road Mosely Birmingham B13 9PL -------------------------- This is a sender's address. What is the meaning of 'B13 9PL'? This address for a formal letter is from the UK>

  116. Physics

    A ball thrown downward with an initial velocity of 20m/s.what will be itsvelocity after 5s

  117. pre calculus

    Can you explain how to find (u • v)(u + v) when u and v

  118. pre calculus

    can you please explain what steps you take to find ||u||2 when u: v: ?

  119. English

    1. Spring is still a long way off. 1-2. Spring is still a long way away. 2. Spring is still far off. 3. Spring is still far away. ------------------------------- Can we use all the sentences?

  120. Social Studies

    How were the lives of white people in the North and the South alike and different?

  121. English

    The Personal Manager Cratex Ltd. 21 Firside Road Birmingham B15 2RX --------------------------- This is a recipient's address for a formal letter. What is the meaning of "B15 2RX"? This one is from the UK for a formal letter sample.

  122. فيزياء

    A 8.4-kg block is lifted vertically 9.0 m at constant speed by a boy. The work done by the boy is about:

  123. math

    what divided by 7 equals 15

  124. chemistry

    normality of a solution containing 2g sodium carbonate in 250mL solution

  125. English

    1. He was flying above the clouds. 2. He was flying over the clouds. (Are both the same in meaning?) 3. The bird is flying to the south above the clouds. 4. The bird is flying to the south over the clouds. (Is there any diferences between them?) 5. The

  126. Physics

    While analyzing a sample of one, geologist finds that it weighs 2n in air and 1.3N when immersed in water. Calculate the density of the one

  127. English

    Posted by rfvv on Tuesday, November 22, 2016 at 12:22pm. An airplane is a vehicle with wings and one or more engines that enable it to fly through the air ----------------------- In this sentence, what does 'it' refer to? Does 'it' refer to 'an airplane'

  128. Statistics

    A box contains 4 red marbles and 5 blue marbles. Michelle picks 3 marbles at a random. If Z is the random variable, representing the number of blue marbles picked from the box. Do the ff: A. Express the probability function in tabular and formula form. B.

  129. MATH

    The length of three sides of a triangle are (x+1)cm 2xcm and 3x+1)cm its perimeter is 30cm. Find the value of x and the length of wach sides of triangle

  130. physics

    Does the kinetic energy of a car change more when it speeds up from 10 to 15 m/s or from 15 to 20 m/s? Explain.

  131. history-asap-

    How revolutionary was the Scientific Revolution? Provide at least three examples as evidence to support your opinion. I need help answering this.

  132. maths

    Find the two natural no in the ratio of 5:7 such that it's lam is 210 with method

  133. Physics

    You are given five identical resistors each of resistance r. How can you arrange all these resistors (in series, in parallel, or both) in order to have an equivalent resistance of 7r/2, 7r/3 or 2r

  134. Differential calculus

    Sketch the graph of the curve y=(x-2)(x+1)(x+3)

  135. Math

    If a car travels 180km in 4hrs how much time will it take to cover 400km

  136. Business management

    Technology factor of L'Oreal

  137. Science

    How does a cockroach protect itself?

  138. Physics

    How could you use 100 pounds of force to lift a 200 pound weight? Explain precisely, listing any necessary distances and details. (This will take some converting!) I don't understand this question, could someone please help me? I think I only need the

  139. science

    How much work is done by the system if the internal energy decrease by 100j when 200j applied to the system

  140. Math please explain how to do this

    how do I find the value of x in the following: (x-520,000)/[(800,000+880,000)/2]=

  141. math

    How do you use a conversion chart?

  142. algebra

    Three times the difference of two numbers is 3 more than the larger and three times their sum is less than 8 Times the smaller by 2 .find the numbers

  143. Calculus

    A particle moves along line segments from the origin to the points (3, 0, 0), (3, 3, 1), (0, 3, 1), and back to the origin under the influence of the force field F(x, y, z) = z2i + 2xyj + 3y2k. Find the work done.

  144. algebra

    The difference between the length and the breathe of a rectangle is 12 m.the perimeter of a rectangle is 144m.find the dimensions.

  145. Calculus

    Use Stokes' Theorem to evaluate C F · dr where C is oriented counterclockwise as viewed from above. F(x, y, z) = yzi + 9xzj + exyk, C is the circle x2 + y2 = 1, z = 3.

  146. Chemistry

    A 2.00L flask was filled with 4.00 mol of HI at a certain temperature and given sufficient time to react. At equilibrium the concentration of H2 was 0.400 M. Find the equilibrium concentrations of I2 and HI and then find the Keq at this temperature 2HI(g)

  147. science

    a stone is dropped from the tower of hight 125m; calcute (1) Time taken to reach the ground. (2) Find velocity of stone.

  148. Algebra 2

    You have 48 minutes to take an exam of 21 questions. After you finish the first 10 questions, you realize you must answer the remaining questions twice as fast to finish the exam. How many questions per minute were you answering?

  149. algebra

    The sum of the two digits of a number is 11 .the difference between the original number and the number formed by interchanging the digits is 9 .find the number.

  150. Algebra 2

    One hundred liters of a 57.84% acid solution is obtained by mixing a 75% solution with a 42% solution. How many liters of each must be used to obtain the desired mixture? A) 40 liters of 75% acid and 60 liters of 42% acid B) 53 liters of 75% acid and 47

  151. Calculus

    The number of people expected to have a disease in t years is given by y(t)=A•3^(t/4) i) if now year(2016) the number of people having disease is 1000, find the value of A? ii) how many people expected to have the disease in five years? iii) when are

  152. Physics

    A force F =(8.700 N)i +(−9.000 N)j F→=(8.700 N)i +(−9.000 N)j is exerted on a particle located at r=(−8.400 m)i +(7.700 m)j r→=(−8.400 m)i +(7.700 m)j. What is the torque on the particle about the origin?

  153. Math

    Evaluate the surface integral S F · dS for the given vector field F and the oriented surface S. In other words, find the flux of F across S. For closed surfaces, use the positive (outward) orientation. F(x, y, z) = x i + y j + z4 k S is the part of the

  154. Math

    How to you write an equation of a line with no slope and no points?

  155. Trigonometry

    All values of theta are positive. From left to right, the first peak occurs at (pi/2,1) and the second peak occurs at (9pi/2). A. Write the graphs equation as a cosine function. B. Write the graphs equation as a sine function.