Questions Asked on
November 3, 2011

  1. Physics

    An Alaskan rescue plane traveling 36 m/s drops a package of emergency rations from a height of 137 m to a stranded party of explorers.Where does the package strike the ground relative to the point directly below where it was released

    asked by Katie
  2. chemistry

    a 10.0mL sample of an unknown H3PO4 solution requirs 112mL of 0.100 M KOH to completely react with the H3PO4. What was the concentrartion of the unknown H3PO4 solution? H3PO4 + 3KOH -----> 3H2O + K3PO4 Ive seen these problems with one volume but not two

    asked by Monique
  3. Math

    The length of a track around a football field is 1/4 mile. How many miles do you walk if you walk 2 3/4 times around the track?

    asked by Mia
  4. Math

    how many faces does rectangular prism have? and How many vertices does rectangular prism have?

    asked by krys
  5. Physical Science

    DISTANCE-TIME for RUNNERS Time(s) 1 2 3 4 Sally's Distance(m) 2 4 6 8 Alonzo's Distance(m) 1 2 2 4 Make a distance-time graph that shows the motion of both runners. What is the average speed of each runner? Which runner stops briefly? Over what time

    asked by Ashley
  6. social studies

    What do you think Deganawida meant when he said, "All shall receive the Great Law and labor together for the welfare of man"?

    asked by dakota
  7. Physics

    A baseball bat balances 61.1 cm from one end. If a 0.600 kg glove is attached to that end, the balance point moves 22.7 cm toward the glove. Find the mass of the bat.

    asked by Cooper
  8. Chemistry

    Okay so I kinda understand where to put the numbers into the formula but i'm not sure how to calculate the distance so could someone kindly walk me through the problem so i can understand it. Thank you so much. Calculate the amount of energy required for

    asked by Amanda
  9. Math

    A box of cereal cost $3.59 for 30 oz. Find the unit rate.

    asked by Adam
  10. physics

    A 60 kg skydiver moving at terminal speed falls 50 m in 1 sec. What power is the skydiver expending on the air? The terminal speed of the falling object is the maximum constant speed the object will reach due to the opposing force of air resistance.

    asked by pakilina
  11. physics

    A tennis player receives a shot with the ball (0.0600 kg) traveling horizontally at 56.0 m/s and returns the shot with the ball traveling horizontally at 44.0 m/s in the opposite direction. What is the impulse delivered to the ball by the racket?

    asked by sarah
  12. geometry

    In ∆RST, RS = 10, RT = 15, and m∠R = 32. In ∆UVW, UV = 12, UW = 18, and m∠U = 32. Which of the following statements is correct? 1. ∆RST ∼ ∆WUV and the similarity ratio is 56. 2. ∆RST ∼ ∆UVW and the similarity ratio is 56. 3. ∆RST ∼

    asked by chris
  13. Chem AP!!! please help!!!!

    Select all that follow the trends of lattice energy: BaO > KF 1. Fluorine is more electronegative than oxygen. 2. The ions in BaO are +2 and -2; whereas in KF they are +1 and -1. 3. The atomic radii of Ba and O are smaller than those of K and F. 4. The

    asked by Kajri
  14. statistics

    A density graph for all the possible speeds between 0 mph and 320 mph is in the shape of a triangle. What is the height of the triangle?

    asked by Bob
  15. Physics

    a stone is dropped from a 75m building. when a stone has dropped 15m, a second stone was thrown downward with an initial velocity such that the two stones hit the ground at the same time. what was the initial velocity of the second stone.

    asked by Oscar Zambrano
  16. Algebra

    83. Minimizing Marginal Cost The marginal cost of a product can be thought of as the cost of producing one additional unit of output. For example, if the marginal cost of producing the 50th product is $6.20, it cost $6.20 to increase production from 49 to

    asked by Terry
  17. Physics

    A set of fossilized triceratops footprints discovered in Texas show that the front and rear feet were 3.2 m apart. The rear footprints were observed to be twice as deep as the front footprints. Assuming that the rear feet pressed down on the ground with

    asked by Cooper
  18. CHEMESTRY

    Which of the following solutions would have the lowest boiling point? A.1.0 M NaCl B.2.0 M NaCl C.3.0 M NaCl D.4.0 M NaCl

    asked by SANDRA
  19. MATH HOMEWORK HELP PLEASE ANSWER

    Lee Holmes deposited $15,000 in a new savings account at 9% interest compounded semiannually. At the beginning of year 4, Lee deposits an additional $40,000 at 9% intrest compounded semiannually. At the end of 6 years, what is the balance in Lee's account?

    asked by Kelitis
  20. LiteratureSATIRE143

    PLEASE CORRECT!! _______ 1. A Modest Proposal satirizes — A English policy in Ireland B Irish bankers C people who do not pay rent D problems caused by overpopulation ______ 2. The narrator of AModest Proposal assumes the character of a(n) — F American

    asked by lucy
  21. chemistry

    Calculate the molarity of the commercial bleach before it was diluted. bleach 6.25%

    asked by Anna
  22. Physics

    Jill of the Jungle swings on a vine 6.4 long. What is the tension in the vine if Jill, whose mass is 59 , is moving at 3.0 when the vine is vertical?

    asked by Chris
  23. Math

    Lance Jackson deposited $5,000 at Basil Bank at 9% interest compounded daily. What is Lance's investment at the end of 4 years?

    asked by Lidsay
  24. science

    On Apollo missions to the Moon, the command module orbited at an altitude of 150 above the lunar surface. How long did it take for the command module to complete one orbit?

    asked by jessica
  25. physics

    A man whose mass is 70 kg walks up to the third floor of a building. This is a vertical height of 12 m above the street level. (a) How many joules of work has he done? (b) By how much has he increased his potential energy? (c) If he climbs the stairs in 20

    asked by pakilina
  26. Physics

    A bicyclist is coasting down a road that is sloped downward at an angle of 8°. The bicycle and bicyclist have a total mass of 80 kg. If the bicycle wheels roll freely, without any effect from friction or air resistance slowing the motion, how fast would

    asked by Pat
  27. Math

    Lee Holmes deposited $15,000 in a new savings account at 9% interest compounded semiannually. At the beginning of year 4, Lee deposits an additional $40,000 at 9% intrest compounded semiannually. At the end of 6 years, what is the balance in Lee's account?

    asked by Linda
  28. chemistry

    Write a formula for the compound that forms from potassium and acetate.

    asked by Anonymous
  29. consumer mathB

    Your box of raisin bran cost $1.89 last year. This year it costs $2.25. What is the inflation rate?

    asked by jacob
  30. ENGLISH

    PLEASE HELP !! Identify the pronoun in the sentence below. Also identify the class and noun function of the pronoun using the abbreviations from the chart. For intensive pronouns, put NONE for noun function. 1.Robert was successful because his planning

    asked by sammy
  31. Chemistry

    Which equation does not fit the definition of oxidation? 1. Na ® Na+ + e- 2. C2H6 ® H2 + C2H4 3. C + O2 ® CO2 4. Ag+ + e- ® Ag Can some one help. I do not know which one. I am working on a practice test and there are no answers in the back of the book.

    asked by nan
  32. physics

    A body slides down a curved track which is one quadrant of a circle of radius R. If it starts from rest at the top of the track and there is no friction, find the speed at the bottom of the track is R equals 5 m.

    asked by pakilina
  33. algebra

    mei salary starts at 16,000 per year with annual raises or 1,500. janet salary is 19,300 with annual raise of $950.00. After how many years will the two women be earning the same salary?

    asked by mdm
  34. Maths

    Consider the curve defined by y4= y2- x2. At what ordered pair (x,y) is the line 4x√3-4y=1 tangent to the curve y4= y2- x2?

    asked by Anju
  35. MATH...PLZ HELP

    The width of the Confidence Interval is inversely related to the Maximum Error of Estimate. T or F? Why or why not?

    asked by Jen
  36. chemistry

    Calculate the molarity of the commercial bleach before it was diluted. bleach 6.25%

    asked by Anna
  37. PHysics

    A thin, light wire is wrapped around the rim of a wheel, as shown in the following figure. The wheel rotates without friction about a stationary horizontal axis that passes through the center of the wheel. The wheel is a uniform disk with radius 0.400 m.

    asked by omg
  38. world history

    How did powerful families of Japan like the Fujiwara legitimate their power at court

    asked by tasha
  39. Calculus

    a) Find the volume formed by rotating the region enclosed by x = 6y and y^3 = x with y greater than, equal to 0 about the y-axis. b) Find the volume of the solid obtained by rotating the region bounded by y = 4x^2, x = 1, and y = 0 about the x-axis. c)

    asked by Beth
  40. Physics

    A torque of 0.13 N*m is applied to an egg beater. If the egg beater starts at rest, what is its angular momentum after 0.50 s?

    asked by Cooper
  41. math ( algebra 2 )

    a newspaper company currently charges $11 a week to its subscribers, but is considering raising their price. the company found that the weekly revenue y can be modeled by the function y= -750(x-40)(x+20) where x is the number $.50 increases in the weekly

    asked by Mike
  42. science (PLEASE HELP)

    Why is condensation on the beaker resulted from burning methane a chemical reaction?

    asked by Lily
  43. Chemistry

    If in an experimental reaction 32.5 mL were collected of hydrogen gas at 23.5 degrees celsius and 745.2 Torr what would be the volume corrected to STP conditions?

    asked by Maria
  44. chemistry

    How much heat is required to warm 250.4 g of water from 22.6 C to 75.8 C given that the specific heat capacity of water is 4.184 J/gx degrees C?

    asked by Teresa
  45. Can somebody answer this question?????????????????

    Lance Jackson deposited $5,000 at Basil Bank at 9% interest compounded daily. What is Lance's investment at the end of 4 years?

    asked by Kelitis
  46. physics

    A centrifuge is a common laboratory instrument that separates components of differing densities in solution. This is accomplished by spinning a sample around in a circle with a large angular speed. Suppose that after a centrifuge in a medical laboratory is

    asked by marie
  47. Algebra 2

    An extruder can fill an empty bin in 2 hours and a packaging crew can empty a full bin in 5 hours. If a bin is half full when an extruder begins to fill it and a crew begins to empty it how long will it take to fill the bin?

    asked by GY
  48. science

    On Apollo missions to the Moon, the command module orbited at an altitude of 150 above the lunar surface. How long did it take for the command module to complete one orbit?

    asked by Tyler
  49. Physics

    On Apollo missions to the Moon, the command module orbited at an altitude of 150 above the lunar surface. How long did it take for the command module to complete one orbit?

    asked by Chris
  50. Programing

    write a pseudocode for a program that asks for the Employee ID, the hours worked and the pay rate, then returns the employee's gross pay for the week?

    asked by Amanda
  51. Chemistry

    will acidic foods cooked in a cast iron skillet become Fe+2 enriched because of a reaction beteen the acidic food and the skillet?

    asked by Veronica
  52. chemistry

    Iron reacts with superheated steam(H2O) to form hydrogen gas and the oxide Fe2O3. (write) Balance this chemical reaction. And if 10grams of Iron react with excess steam, how many grams of Fe2O3 are produced? How many grams of H gas? How many grams of H2O

    asked by leslie
  53. English

    I am writing a comparison essay how Miley cyrus song the climb argument is better than katy perry fireworks. I need help finishing my conclusion. my thesis restated is: Miley Cyrus's argument for how every person is an individual is more compelling than

    asked by lalala
  54. math

    Karen says, "When I have a factor with exactly 2 zeros at the end, my answer will always have 2 zero at the end." Do you agree? Explain. Thanks

    asked by Isabella
  55. economics

    Market demand is given as QD = 200 – 3P. Market supply is given as QS = 2P + 100. Each identical firm has MC = 0.5Q and ATC = 0.25Q. What is each firm’s profit?

    asked by martha
  56. maths

    write the square root of 32as a power of 2 and hence solve the equation 16to the power of x-1=2 square root of 32

    asked by helen
  57. Physics

    You pull downward with a force of 32 N on a rope that passes over a disk-shaped pulley of mass 1.3 kg and radius 0.075 m. The other end of the rope is attached to a 0.60 kg mass. Find the linear acceleration of the 0.60 kg mass.

    asked by Cooper
  58. physical science

    If a book sits on a shelf1.5 m above the floor.One frienf tells you that the book's mechanical energy is zero, and another says it is not . Who is correct?

    asked by Diane
  59. Physics

    A communications satellite with a mass of 400 is in a circular orbit about the Earth. The radius of the orbit is 3.7×104 as measured from the center of the Earth. Calculate the gravitational force exerted on the satellite by the Earth when it is in orbit.

    asked by Chris
  60. lab math

    If 0.5 ml of serum is added to 1.5 ml of saline, what is the dilution

    asked by Shaquilla
  61. Physics

    A uniform metal rod, with a mass of 3.0 kg and a length of 1.0 m, is attached to a wall by a hinge at its base. A horizontal wire bolted to the wall 0.64 m above the base of the rod holds the rod at an angle of 40 degrees above the horizontal. The wire is

    asked by Cooper
  62. calculus

    Lim (1+(a/x))^(bx) x->infinity I'm having a lot of trouble with this limit.

    asked by John
  63. chemistry

    How many milliliters of a 110mL solution of 1.5 M AlCl3 must be used to make 70mL of a solution that has a concentration of 0.2M Cl–?

    asked by Dave
  64. physics

    find the force of gravity between 74.0kg physics students that are sitting 85.0 cm apart

    asked by Anonymous
  65. geometry

    You have 32 feet of fencing and want to determine the maximum area that can be enclosed with the fencing to make a flower garden. You do not want to deal with fractions or decimals, so you are limiting the dimensions to whole numbers. Also, the area is to

    asked by Anonymous
  66. Physics

    A 8.0×10−2- toy airplane is tied to the ceiling with a string. When the airplane's motor is started, it moves with a constant speed of 1.30 in a horizontal circle of radius 0.49 , as illustrated in the figure . Find the angle the string makes with the

    asked by Chris
  67. physics

    A 2 kg block is pushed 2 m along a fixed horizontal surface by a horizontal force of 20 N. The coefficient of kinetic friction of the surface is µk= 0.40. (a) How much work is done by the 20 N force? (b) what is the work done by the friction force? (c)

    asked by pakilina
  68. chemistry

    Given the following reaction and enthalpy change, calculate the amount of heat for converting 100.4g of liquid water (18.02g/mole) to a vapor? delta H= +44kJ

    asked by Teresa
  69. Algebra ii

    A certain town is at a latitude of 35.2 degrees N. Find the distance in miles from the town to the north pole.

    asked by Arielle
  70. Physics

    Find the centripetal acceleration at the top of a test tube in a centrifuge, given that the top is 4.5 from the axis of rotation and that its linear speed is 76 .

    asked by Chris
  71. PHYSICS

    m1 = 2.7 kg block slides on a frictionless horizontal surface and is connected on one side to a spring (k = 40 N/m) as shown in the figure above. The other side is connected to the block m2 = 3.6 kg that hangs vertically. The system starts from rest with

    asked by joe
  72. physics

    A 2kg block is placed onto a vertically oriented spring whose spring constant k is 1960 N/m. Find the distance that the spring will be compressed.

    asked by pakilina
  73. Algebra 2

    A boat has a 10 gallon gasoline tank and travels at 20mi/hr with a fuel consumption of 16mi/gal when operated at full throttle in still water. The boat is moving upstream into a 5mi/hr current. How far upstream can the boat travel and return on 10 gallons

    asked by GY
  74. advanced math

    Suppose you have 168 meters of fencing with which to make two side-by-side rectangular enclosures against an existing wall. If the rectangular enclosures are adjacent and of the same depth, what is the maximum are that can be enclosed?

    asked by thomas
  75. chemistry-light

    the SI Unit of length is meter,which is defined as the lenght equal to 1,650,763.73 wavelengths of light of the light emitted by a particuar energy transition in krypton atoms.calculate the frequency of the light to three significan figures.

    asked by nja
  76. world history

    Which group forced the Chinese to acknowledge their claim to the mandate of heaven and sign a treaty in 1127 C.E

    asked by tasha
  77. English 10

    In the autobiographical selections "Hair" and "It Can't Be Helped," the authors describe how racial prejudice affected their early lives. Identify the key event described in each of the selections. Then explain how each author responded to the event at the

    asked by Sabrina
  78. english

    Identify the pronoun in the sentence below. Also identify the class and noun function of the pronoun using the abbreviations from the chart. For intensive pronouns, put NONE for noun function. That was a very long phone call.

    asked by sammy
  79. physics.pls help

    The volume of a cylinder is defined by the formula V=pie R squared h. If initially have a cylinder with a volume of 10m cubed. Find the volume of the cylinder if the height doubles and if the height is cut in half. pls i really need help.

    asked by ted
  80. physics

    a 1540 kg truck is traveling at 95 km/hr. what average force is required to stop in 10 seconds

    asked by cody
  81. Algebra ii

    City B is due north of city A. City A has a latitude of 14.6 degrees N, and city B has a latitude of 47.2 degrees N. find the distance in kilometers between the cities.

    asked by Arielle
  82. physics

    A uniform disk with a mass of 27.3 kg and a radius of 0.309 m is free to rotate about a frictionless axle. Forces of 90.0 N and 125 N are applied to the disk, as the drawing indicates. (b) What is the angular acceleration of the disk?

    asked by Sami
  83. Physics

    A fish takes the bait and pulls on the line with a force of 2.2 N. The fishing reel, which has a friction clutch that exerts a restraining torque of 0.048 N m, is a cylinder of radius 0.055 m and mass 0.84 kg. Part A What is the angular acceleration of the

    asked by Cooper
  84. Chem 152

    if x moles of PbCl2(s) dissolve in 1.00L of water, how many moles of Pb2+(aq) are produced? how many Cl- produced?

    asked by kevin
  85. English

    HELP. How do would you annotate this? and answer the questions under the passage..??? But now, fearing death, all eyes fixed on Charybdis now Scylla snatched six men from our hollow ship, the toughest, strongest hands I had, and glancing backward over the

    asked by Sarah
  86. science, ocean currents

    waste produced by people in delaware has been dumped into the atlantic ocean, where it is distributed by surface ocean currents. which coastal area is most likely to become polluted by this waste

    asked by zoey
  87. english

    Can somebody help me restate my thesis please. statement for the conclusion. My thesis is: An analysis of the literary devices in Katy Perry " Fireworks" and Miley Cyrus " The Climb" reveals Miley Cyrus creates a better argument for how every person is an

    asked by jane
  88. chem

    A 2.30 L sample of O2(g) was collected over a liquid at a total pressure of 785 torr and 25°C. When the O2(g) was dried (vapor of that liquid removed), the gas had a volume of 1.93 L at 25°C and 785 torr. Calculate the vapor pressure of this liquid at

    asked by Anonymous
  89. math

    a runner time in the 100 meter dash is 32second when rounded to the nearest whole number. Name the fastest and slowest time in decimal to hundredths.

    asked by sunny
  90. Science

    At an accident scene, 276-m long skid marks are found on the road. If the car that made these skid marks can decelerate at –9.8 m/s2, how fast was the car going before braking?

    asked by Ray
  91. MATH....

    Determine the level of the confidence given the confidence coefficient z(α/2) for the following situation: z(α/2) = 1.96

    asked by Jen
  92. english

    for my comparison essay i am analysis of the 2nd device for katy perry song fireworks.. i need help explaining this line into details. could somebody give me like at least 1-2 sentence explaining it. this is what i got so far: Perry then uses imagery when

    asked by lalala
  93. english

    my comparison essay introduction paragraph. can someone help me think of what to wrtie before the "an analysis...." i just need a general idea of what to write because im stuck. here the intro: Miley Cyrus song “The Climb” is not only one of my

    asked by lalala
  94. Math

    How are cube and a rectangular prism alike? How are they different?

    asked by Dyna
  95. University studies

    According to the Center for Mathematics Excellence, which of the following is a math myth? A. Knowing the rules and how to use them is the most important part of math. B. Even people who are highly skilled in mathematics and science find these subjects to

    asked by lil Bee
  96. Physics

    Driving in your car with a constant speed of 12 , you encounter a bump in the road that has a circular cross-section, as indicated in the figure . If the radius of curvature of the bump is 35 , find the apparent weight of a 70- person in your car as you

    asked by Chris
  97. confused

    serigo has 30 gifts numbered from 1 to 30. There is a kite in each gift with a number that is multible of 4. There is a baseball cap in each gift with a number that is multiple to 6. Which gifts have a kite? Which gifts have a baseball ? Which gifts have

    asked by help please !!!!!!!!!!!!!!!!!!!!
  98. Physics

    Find the linear speed of the bottom of a test tube in a centrifuge if the centripetal acceleration there is 5.1×104 times the acceleration of gravity. The distance from the axis of rotation to the bottom of the test tube is 7.7 .

    asked by Chris
  99. please someone answer this question

    A tortoise can run with a speed of 16.0 cm/s, and a hare can run exactly 25 times as fast. In a race, they both start at the same time, but the hare stops to rest for 2.00 min. The tortoise wins by 20.0 cm. (a) How long does the race take? (b) What is the

    asked by joy
  100. science, ocean currents

    waste produced by people in delaware has been dumped into the atlantic ocean, where it is distributed by surface ocean currents. which coastal area is most likely to become polluted by this waste

    asked by zoey
  101. Chemistry

    A stock solution is prepared by adding 20mL of 0.2M MgF2 to enough water to make 80mL. What is the F– concentration of 20 mL of the stock solution?

    asked by aDRIAN
  102. physics

    A 700-N girl jumps from a balloon 36.0 m above the ground, and is brought to rest (instantaneously) 4.00 m above the ground by an elastic cord attached to the balloon. (a) Is the girl’s acceleration upward, downward or zero at this time? Explain. (b) If

    asked by Anonymous
  103. math

    Write in expanded form. 7.37 Is this the correct answer? 7+3/10+7/100

    asked by Ruby
  104. Social Studies

    How do you think the founders of the roman republic would have viewed the roman empire

    asked by Adam
  105. math ( algebra 2 )

    a newspaper company currently charges $11 a week to its subscribers, but is considering raising their price. the company found that the weekly revenue y can be modeled by the function y= -750(x-40)(x+20) where x is the number $.50 increases in the weekly

    asked by Mike
  106. math

    A piece of plywood is cut into strips 2 1/2 inches wide. How many strips of this width can be cut? HELP!!!

    asked by Linta
  107. economics

    A monopolist faces market demand given by P = 200 – Q. For this market, MR = 200 – 2Q and MC = 3Q. What quantity of output will the monopolist produce in order to maximize profits?

    asked by martha
  108. Math-System of Equations

    1. Solve for x, y, z in the following system: 2x-3y-2=z y-x+z=1 -y-2z=7 The answers are: x=-7 y=-5 and z=-1 however I don't know how to go about this.

    asked by Lilly
  109. AP Physics b

    Design a carnival ride on which standing passengers are pressed against the inside curved wall of a rotating vertical cylinder. It is to turn at most at 1/7 revolution per second. Assuming a minimum coefficient of friction of 0.10 between clothing and

    asked by gaston
  110. Calculus

    If the normal to f(x)= (3x/(1+x)) at (2,2) cuts the axes at B and C, determine the legnth of BC.

    asked by keya
  111. algebra 2

    the perimeter of a triangle is 49 centimeters. find the lenghts of its sides, if the longest side is 9 centimeters longer than the shorter side, and the remaining side is 4 centimeters longer than the shorter side.

    asked by takeidra
  112. English Composition

    What makes Z.Z. Packer's "Every Tongue Shall Confess" difference from other short stories?

    asked by Lorraine
  113. sci

    1. A penny is dropped from the 82nd Floor Observatory of the Empire State Building. The penny will fall from a height of 320 meter (1,050 feet). (a) How long will it take to fall? (b) How fast is it going when it hits the ground? 2. Aim the Mythbuster’s

    asked by ray
  114. Trigonometry

    Add 3+ 4i and -4+2i graphically My class got 1+ 2 radical 10 /2 and 1-2 radical 10 /2 . whenever i put this into the y= graph, nothing shows up on the graph. Can someone tell me how to solve this algebraically and graphically?

    asked by Tomtom
  115. Social studies world history

    What are the similarities between the northern and middle colonies. I only have one by far seeking relgios freedom but may anyone tell me more? And some similarities if you can about southern and middle colonies. Please and thank-you!

    asked by Apple
  116. Chemistry 121

    How much oxygen would be needed to completely burn 250g of propane?

    asked by Tim
  117. Sentences

    Are my sentences correct with the following directions? (Sentences below directions) Using California as a topic, number and write one example of each of the following: 1. A completely correct simple sentence with an appositive in it. 2. A sentence with

    asked by Alyssa
  118. Algebra 1

    First of all, we're learning how to solve equations with variables on both sides. Write and solve an equation for the situation. An architect is designing a rectangular greenhouse. Along one wall is a 7-ft storage area and 5 sections for different kinds of

    asked by Mercedez
  119. Chemistry

    This question seems too simple to me but i was just wondering if someone could help me with it? 8 a) Explain why the first ionisation energy values for the Group 1 elements become less positive as you go down the group? I have done this part it's b which

    asked by Carol
  120. Physics

    When you take your 1000- car out for a spin, you go around a corner of radius 57 with a speed of 19 . The coefficient of static friction between the car and the road is 0.88. Assuming your car doesn't skid, what is the force exerted on it by static

    asked by Chris
  121. Chemistry

    9. Iron is produced by reducing iron(III) oxide with CO: Fe2O3 + 3 CO → 2 Fe + 3 CO2 ∆H = –23 kJ . How much heat is produced when 1.00 kg of Fe2O3 are reduced?

    asked by Ashley
  122. grammar

    James walked to the park. Is the predicate "walked to the park" or just "walked?"

    asked by Haroldine
  123. MATH

    Assume that the population of heights of male college students is approximately normally distributed with mean of 72.83 inches and standard deviation of 6.86 inches. A random sample of 93 heights is obtained. Show all work. (A) Find the mean and standard

    asked by Jen
  124. geometry

    On a graph, the points (4,-2),(7,-2),(9,-5) and (2,-5) are connected in order to form a trapezoid. To the nearest tenth, what is its perimeter?

    asked by Millwe
  125. physics

    A projectile of mass 0.550 kg is shot straight up with an initial speed of 22.0 m/s. (a) How high would it go if there were no air friction? I get 24.7m for this. (b)If the projectile rises to a maximum height of only 13.6 m, determine the magnitude of the

    asked by Kelsey
  126. Science

    How much work does the hiker do if he uses 800 n of force to walk 100 meters?

    asked by jill
  127. probability

    One container contains 6 red and 4 white balls, while a second container contains 7 red and 3 white balls. A ball is chosen at random from the first container and placed in the second. Then a ball is chosen at random from the second container and placed in

    asked by alex
  128. Chemistry

    I have 93.954 mL of a generic cola solution. The solution contains: Molarity of H++1.005e-7 Molarity of OH- = 1.005e-7 Molarity of Sucrose(aq) = 6.386e-1 Molarity of Dye= 5.322e-3 Calculate the mass percent, molarity, molality and mole fraction.

    asked by Emily
  129. science!

    1. A plane accelerated from a speed of 2.0 m/s at the rate of 3.0 m/s2 over a distance of 530 m. What is its speed after traveling this distance? 2. A jet plane must achieve a velocity of 71 m/s for takeoff. From rest and with a 1,000 m long runway, what

    asked by ray
  130. Chemistry 121

    How many grams of KCl would be produced from the complete decomposition of 2.75g of KClO3?

    asked by Tim
  131. physics

    Suppose you need to measure the mass of an object, but have only a 7-kg standard mass and a meter stick. Place a knife edge under the 50-cm mark of the meter stick. Then put the 7-kg standard mass at the 39.1-cm mark and place the object so as to balance

    asked by Sami
  132. 8th grade math

    How do you simplify problems like 8x + 3 (7x-6) -9(4x-8) + 2x? Please help!! Thank you!

    asked by saranghae12
  133. sci

    1. A penny is dropped from the 82nd Floor Observatory of the Empire State Building. The penny will fall from a height of 320 meter (1,050 feet). (a) How long will it take to fall? (b) How fast is it going when it hits the ground? 2. Aim the Mythbuster’s

    asked by ray
  134. Trigonometry

    A ship travels S 62 E and for 48 km and then turns and travels N 28 E for 37 km.

    asked by Shiann
  135. Algebra ii

    A 1.25 m long pendulum swings 5.75 degrees on each side of the vertical. Find the length of arc traveled by the end of the pendulum.

    asked by Arielle
  136. English

    Can someone let me know if these answers are right? Thanks in advance! Questions 1-7 all have the same format and answer choices. The answer choices are fully explained here, but they are in shortened versions in the remaining questions. Although you do

    asked by Anonymous
  137. Chemistry

    n our text book the following equation is given: P=(pm - p)g * R where P is the pressure drop R is the manometer reading pm is the density of the manometer fluid p is the density of the process fluid in the pipe g is the acceleration do due to gravity Then

    asked by Bella
  138. Math,fraction word problem

    a total of 9litres of orange syrup was poured equally into 6jug. Susan poured 2over5 litres of orange syrup from a jug into a glass&drank it.she found the syrup too sweet,so she added 4over5 litres of water into the jug she had.find the total amount of

    asked by Da S
  139. Cal 1

    A trough is 10 ft long and 2.6 ft across the top. Its ends are isosceles triangles with an altitude of 2.1 ft and vertex down. Water is being pumped into the trough at a rate of 2.4 ft3/min. How fast is the water level rising when the water is 1.39 ft

    asked by ninzyy
  140. physics

    Your electricity usage for a one month period is 500 kilowatt-hours. Assuming one month is equal to 30 days and that the electricity usage is uniform across the whole month, what would be the velocity of a 1 kg mass if it was given the kinetic energy

    asked by pakilina
  141. Physics

    A projectile of mass 0.800 kg is shot straight up with an initial speed of 28.0 m/s. (a) How high would it go if there were no air friction? (b) If the projectile rises to a maximum height of only 26.8 m, determine the magnitude of the average force due to

    asked by Heather
  142. Mathematics

    The firts terms a of an A.P is equal to twice the common difference d.Find, in term of d, the 5th term of the A.P.

    asked by Yinka
  143. Math

    Which would amount to more money on December 31 of this year: $500 invested on January 1st of this year at 10% annual interest compounded quarterly; or a lump sum payment of $580? (a) the $500 investment (b) both are the same (c) the $580 lump sum (d)

    asked by Michael
  144. Chemistry

    Sorry Dr. Bob, I wsa looking for the Sucrose, not all 16 calculations. Can you help me with the Sucrose? I have 93.954 mL of a generic cola solution. The solution contains: Molarity of H++1.005e-7 Molarity of OH- = 1.005e-7 Molarity of Sucrose(aq) =

    asked by Emily
  145. 4th grade Math

    hello, I'm helping my son with his assignment but unsure if the answer is correct. Please help advise. Milton needs to find the product of two numbers. One of the numbers is 9. The answer also needs to be 9. How will he solve this problem? Explain. 3 x 3 =

    asked by Zack
  146. Physics

    A 6.5- bowling ball and a 7.1- bowling ball rest on a rack 0.80 apart. Part A- What is the force of gravity exerted on each of the balls by the other ball? Part B- At what separation is the force of gravity between the balls equal to 2.2×10−9 ?

    asked by Chris
  147. Chemistry

    Obtain the radius of a sphere of zinc if its mass is 0.23 mg. The density of zinc is 7.14 g/mL. The given formulas are: d=m/v v=(4/3)pi r^3

    asked by Jacob
  148. History Please Please

    The agricultural revolution occurred at different time and in different places around the world. In most regions it happened in river valleys, as it did in the Near East. Focus your attention on the similarity of the locations of Mesopotamia and Egypt. Why

    asked by Malena
  149. Calculus

    Answer the following questions for the function f(x) = sin^2(x/3) defined on the interval [ -9.424778, 2.356194]. Rememer that you can enter pi for \pi as part of your answer. f(x) is concave down on the interval ? Please help, im REALLY stuck.

    asked by Anonymous
  150. Physics

    If t is 04.00s, then what is the percentage uncertainty in t^2?

    asked by Anonymous
  151. Math

    the time x (in days), that it takes a planet to revolve around the sun can be approximated by the equation x=0.407√(d^3),where d is the mean distance of the planet from the sun in millions of miles. It takes Venus approximately 226 days to complete one

    asked by Mary
  152. Science

    Technology has been used for centuries to study the ocean. Trace the history of one piece of technology. What do you think is the most important technology to study the ocean? And why do you think so?

    asked by Kevin
  153. science

    How much potash alum is prepared by 6g Al2(SO4)3 & 1.5g K2SO4?

    asked by Meena Garg
  154. PLZ ANSWER CHEM QUESTION

    a chemist reacted 64 grams of Ru with O2. This reaction produced 160 grams of ruthenium oxide and 4 grams of leftover O2. How much of the reactants would this scientist need to make 320 grams of the product with no leftover O2? Ru + O2 = RuO2 + O2 leftover

    asked by Griffinson
  155. Algebra II

    A capstan on a magnetic tape drive rotates at 3600 rad/min and drives the tape at a speed of 45.0 m/min. Find the diameter of the capstan in millimeters

    asked by Arielle
  156. math

    Pork is sold for $18.46 per kilogram.What is the cost of 0.35 kilogram of pork convrted to the nearest cent.

    asked by shervina
  157. english

    for my comparison essay i have finish the conclusion paragraph. can someone edit it or improve it if possible. also do anybody know how i could conclude my essay. here the paragraph: Miley Cyrus’s argument for how every person is an individual is more

    asked by lalala
  158. Math

    How many compounding periods are in a 5 year loan compounded semiannually? (a) 10 (b) 5 (c) 2.5 (d) 15 (e) 20

    asked by James
  159. calc

    Use the Mean Value Theorem to show: -x < sinx < x for all x > 0 (and where I have the inequalities, it's supposed to be less than or equal to for the first two and greater than or equal to for the last one, I just didn't know how to type it)

    asked by nate
  160. physics

    c) Find the height of the rock after 10.1 seconds

    asked by Anonymous
  161. Economics

    Explain why quotas are more effective than tariffs. Thanks! :)

    asked by Candice
  162. geometry

    P (3, 3) and Q (4, 8). Which is the distance from P to Q

    asked by Anonymous
  163. Chemistry

    a chemist wanted to make 100 grams of SO2. She had only 12 grams of sulfur and 4 grams of oxygen. Unfortunately, the amounts of reactants were not enough to make the desired product. How much S and O2 would she need in order to obtain the desired grams of

    asked by jermain
  164. physic

    Average Speed 1. In the 2008 Summer Olympics, Usain Bolt won the 100-m race in 9.69 s. What was his average speed? 2. Light from the sun reaches Earth in 8.3 min. The speed of light is 3.0108 m/s. How far is Earth from the sun? 3. In Major League Baseball,

    asked by ray
  165. maths

    solve the simultaneous equations: y=x-2 ysquared+xsquared=10

    asked by nabiha
  166. English

    I included a few more sentences I need you to check. Thank you very much for your help. 1) He likes zapping/switching channel/changing channel/zooming/trolling Do they have the same meaning? 2) Even in very large cities like London the majority of people

    asked by Henry2
  167. chem

    does (aq) mean a precipitate or (s) Ie BaCl2(aq) Mg(OH)2

    asked by anonymous
  168. math

    What are constants? Please give me an example...

    asked by Colette
  169. Pre- Algebra

    Solve the equation. Be sure to show all of your work. 3x - 3 = 3

    asked by Kameesha
  170. Algebra

    Use slopes and intercepts to determine if the following system is consistent, inconsistent, or dependent. -4x - 5y = 20 -12x - 30y = 60

    asked by Christina
  171. World History

    Which of the following is MOST symbolic of mother teresas dedication to working with poor ? A. She wore a blue-bordered sari like the one worn by the poor women of india. B. She founded a new order in the poorest area of calcutta. C. She resided among the

    asked by Ciara's Sister
  172. math

    At 5:00 a.m. the temperature in Orlando, Florida was already 80 degrees F. By 3:00 p.m. the temperature had risen to 97 degrees F. What is the difference in the temperatures?

    asked by Sally
  173. mutually exclusive-PROBABILITY

    Please explain to me why they are exclusive or not exclusive. Event A is that atleast three of toni's five cousins are female Event B is that atleast three of toni's five cousins are male.

    asked by HM
  174. science

    How did Archimedias prove mathematically that salt water and diving were related to buoyancy?

    asked by Justin
  175. calculus

    at what point is the function y=cos/(5x) continuous?

    asked by Bubu
  176. math

    the lappans buy three large sandwich wraps to serve at a picnic. nine people in all will be at the picnic. showthree different ways to cut the sandwich so that each person gets an equal share

    asked by tori
  177. math

    what is the pattern of 6 starfish with 5 arms each.

    asked by nr
  178. world history

    In the eleventh and twelfth centuries, the Song Dynasty had all of the following characteristics except

    asked by tasha
  179. Math

    Stacy requires $3,000 in three years to make a down payment on a new car. She will receive 8% compounded annually for the three years. How much must she invest today to have the $3,000 in three years? (a) $ 2,381.49 (b) $ 2,419.35 (c) $ 2,000.00 (d) $

    asked by Mike
  180. MATH ( please help me)

    How do you write 9% in a decimal form? Is it x's 100? Is 0.09 the answer?

    asked by Tonya
  181. Math

    Find the present value needed to have $ 1.00 compounded quarterly for 5 years at 6% using the formula (a) 74 ¢ (b) 75 ¢ (c) 76 ¢ (d) 77 ¢ (e) 78 ¢

    asked by Timothy
  182. world history

    What was the most effective remedy for plague

    asked by tasha
  183. Math

    How many compounding periods are in a 5 year loan compounded semiannually? (a) 10 (b) 5 (c) 2.5 (d) 15 (e) 20

    asked by James
  184. statistics

    For a single sample t-test we don't need to know.................of the population, instead we will have access to the ............of the sample.

    asked by Nettie
  185. to Katie A A

    #1 - The school subject is MATH, not "help" -- I've never heard of a school subject called help. #2 - To quote one of our very good math and science tutors: “You will find here at Jiskha that long series of questions, posted with no evidence of effort or

    asked by Writeacher
  186. chemistry

    calculate the quantity of heat (cal, J) required to change the temperature of 1500g water from 25C to 75C. do i have this right 1500 X 4.18J/g C X 50C = 313500

    asked by Doss
  187. Math

    Factor the trinomial. If the trinomial cannot be found, say so. 11m^2 + 14m - 16 I just want to make sure...would the answer be (11m-8)(m+2) ?

    asked by Linda
  188. physics

    The scale of a certain spring balance reads 1200 N when the spring is stretched 0.1m. (a) What is the potential energy of the spring when it is stretched 0.1m and when it is stretched 0.5 m? (b) What is the potential energy when a 50 kg mass hangs from the

    asked by pakilina
  189. help

    wich of these is more heavier, 10liters of water, 10liters of oil or 10kilogrammes of gold

    asked by nester
  190. physics

    (a)Calculate the work done by moving a 50 kg mass along each of the legs of the path shown below. What is the total work expended when going along the entire path? Show all work. Don't just state any obvious results, if any. AB= 5m BC= 10m CD= 19.14m DA=

    asked by pakilina
  191. xeco 212

    I need an example of the "Price Elasticity of Demand" for my economics homework.

    asked by kgirl
  192. Algebra

    x/4 - y/2 = -11/4 x/4 + y/2 = 1/4 solve the system

    asked by Christina
  193. Chemistry 121

    Is 450g of oxygen enough to burn 125g of butane according to the following equation? C4H10 + O2 ---> CO2 + H2O? show why or why not?

    asked by Tim
  194. chemistry

    a sample of iron (35.0g) absorbs 5.50J. of heat. calculate the increase in temperature that occurs

    asked by payton
  195. math

    Dominoes pizza offers 30 different types of pizza and 9 of them contain pepperoni. what percentage of their total number of pizza types have pepperoni on it? Can someone explain to me the procedure please

    asked by jazmin
  196. Social Studies

    Why did the first americans migrate to the amercias. Where did they come from and what were they following? I really don't need a huge history about this qs. I just need to write 2-3 sentences to answer this qs. Please help me I really don't get this.

    asked by Laruen
  197. College math

    Can you explain to me how to write 1/3 as a percent?

    asked by Tonya
  198. Math

    Use the present value formula to compute the amount that should be set aside today to ensure a future value of $ 2,000 in 1 year if the interest rate is 12% annually, compounded annually. (a) $ 1,776.97 (b) $ 1,765.89 (c) $ 1,785.72 (d) $ 1,786.97 (e) $

    asked by Paul
  199. computer science 104

    Create a method areaOfaTrapeziod when given a, b, and h (all doubles), will return the area (double) of a trapezoid. Use the equation pictured below In the code, i should 1. Create the prototype for the method 2. create the method 3. call it from the

    asked by Nan
  200. Math

    serigo has 30 gifts numbered from 1 to 30. There is a kite in each gift with a number that is multible of 4. There is a baseball cap in each gift with a number that is multiple to 6. Which gifts have a kite? Which gifts have a baseball ? Which gifts have

    asked by help please !!!!!!!!!!!!!!!!!!!!
  201. Elememtary Math

    (c)squared-2c+6, for c = 4 I replaced all c's with 4 and my answer is 14. Am I correct.

    asked by Anonymous
  202. chemistry

    How much heat is absorbed by the calorimeter if the temperature change is 10 C and the calorimeter constant (Heat Capacity) is 3.3 J/K?

    asked by Ashley
  203. Math

    Solve the equation 40^2 + 4a = 0 What I did was 4a (10a + 1) = 0 then I'm not sure what to do next...

    asked by Linda
  204. SCIENCE

    Conservation of natural resources could include- A. the use of more renewable sources of energy B. cutting down on the use of fossil fuels C. replacing soil and planting trees D. all of the above

    asked by lance
  205. calculus

    let f(x)= 9(x/(x-1)square)= 9x/ x square-2x+1 find the domain of f and compute the limit at each of its endpoint. then list all horizontal and vertical asymptotes

    asked by laura
  206. english

    do anyone know where i could get information on roles and experiences of women in afghanistan (under Taliban rule) - position in society (economy, politics, religion). also from a reliable website and i am able to reference on my work cited list

    asked by lalala
  207. chemistry

    a sample of carbo (12.5g) abosorbs 888J of heat its temperature changing form 27.0 C to 127 C . Calulate specific heat of Carbon

    asked by payton
  208. Economics

    Explain how the emergence of the global marketplace has been linked to increased integration of the world’s economies. I think globalisation is involved, how can I structure my answer? Thanks!

    asked by Candice
  209. chemistry

    how do you find how many hydrogens there would be in 2,5,6 trimethylnonane?

    asked by lauren
  210. Physics

    A football bobble-head figure sits on your car dashboard. The 83-g head of the figure is attached to a spring with a spring constant of k = 21 N/m. You are driving along a straight road when you notice a series of hoses lying across the road, perpendicular

    asked by Logan
  211. physic

    Block _____ Name ________________________________________ Date __________ Average Speed 1. In the 2008 Summer Olympics, Usain Bolt won the 100-m race in 9.69 s. What was his average speed? 2. Light from the sun reaches Earth in 8.3 min. The speed of light

    asked by Anonymous
  212. Math: Intro to Proofs

    Given: Let f: X -> Y be a function. Then we have an associated function f^(-1): P(Y) -> P(X), where f^(-1) (B)⊂X is the inverse image of B⊂Y. Question: Show that f^(-1) is one-to-one if and only if f is onto. [Notes: ⊂ represents subspace, I just

    asked by Nic
  213. Stats

    I'm having some trouble with a stats portion of an animal behavior lab. We have to do chi-sqaure tests to test 3 hypothesis, which are 1) percent prey captured will decline as prey group size increases 2) percent successful hunts will decline as prey group

    asked by Jackie
  214. spanish

    How do you day, Tell Vicente to come back next Tuesday in Spanish?

    asked by Mike
  215. Algebra ii

    The pulley attached to the turning knob of a radio has a radius of 35 mm. How far will the needle move if the knob is turned a quarter of a revolution?

    asked by Arielle
  216. Algebra ii

    Find the latitude of a city that is 1265 mi from the equator.

    asked by Arielle
  217. chemistry

    a complex apparatus has heat capacity 891J/c . calculate the heat absorbed by the apparatus to change its temperature by 1.3 C

    asked by payton
  218. Math Word Problem!!!!

    Sidney told sam that that he would love a lot that is a trapeziod shape and is being sold for $25,000. It is a regular trapeziod with the top being 500' the sides being 250' each and the bottom being 1000'. George doesn't know if it's worth it so he wants

    asked by Kate
  219. Math

    How could you describe a cylinder to someone who has never seen one?

    asked by Neil
  220. math

    Round to the nearest hundred. 483.9 Is 500 the correct answer?

    asked by Ruby
  221. Math

    If gas cost $3.97 per gallon, what is the cost of filling a 13.8 gallon gas tank? Do I multiply this? Is $54.78 the correct answer? Thank you

    asked by Samantha
  222. English

    Could you please check these sentences? Thank you. 1) Where can I find a complete list of uncountable nouns in English? 2) What kind of television programmes do you like watching? I like watching current affairs programmes so I can keep up to date with

    asked by Henry2
  223. World History

    Which is the best reason vaclav havel was chosen as the first president of the czecj republic after the "fall" of communism. A. He was a well known political activist for freedom. B. He was well known for his anti-government plays. C. He was well-known for

    asked by Ciara's Sister
  224. Math

    (c^6/7 q^5/7)^4/7 To solve would I add the 6+7=13 (cq^13)^4/7 then i end up with cq^28561 I think I am missing something

    asked by Abby F
  225. Math

    Suppose $1.00 amounts to 1.082431 at 8 % compounded quarterly. How much does $200 amount to? (a) $ 126.82 (b) $ 101.46 (c) $ 216.49 (d) $ 380.47 (e) $ 250.00

    asked by Jack
  226. Math

    Find the future amount after one year on $ 2,000 at 5% compounded annually. (a) $ 200 (b) $ 100 (c) $ 2,100 (d) $ 400 (e) $ 550.00

    asked by Frank
  227. calculus

    f(x)=(1+x) what is f'(x) when x=0

    asked by Ben
  228. Equation Help

    In our text book the following equation is given: P=(pm - p)g * R where P is the pressure drop R is the manometer reading pm is the density of the manometer fluid p is the density of the process fluid in the pipe g is the acceleration do due to gravity

    asked by Angel
  229. Maths

    A boy cycled from his home to a friend's house 24km away at an average speed of 16km/h. Finding his friend absent, he returned home immediatly at an average speed of 12km/h. Find the average speed I know how to find the average speed, just that I need to

    asked by 10M1
  230. chemistry

    calculate the quantity of heat (J) which flows froma 125g sample of magnesium as it cools from 650K to 300K

    asked by payton
  231. chemistry

    a sample of carbo (12.5g) abosorbs 888J of heat its temperature changing form 27.0 C to 127 C . Calulate specific heat of Carbon

    asked by payton
  232. calculus

    Find the inflection points of f''(x)= x(x+1)(x-2)^2. Explain

    asked by John
  233. Basic math

    Find the median of the numbers 3, 6, 10, 12, 27, 62 How do I answer this?

    asked by Ruby
  234. geometry

    what is a similiar triangle to one that has a perimeter of 16 inches and an area of 43 square inches

    asked by page
  235. math

    How does a constant relate to an expression?

    asked by Colette
  236. SCIENCE

    Most electricity is produced using fossil fuels. Some people think electricity should be produced using resources such as wind,water,and solar energy. Why might people have this opinion?

    asked by Ally
  237. Accounting

    Present value analysis-cost of capital National Leasing is evaluating the cost of capital to use in its capital budgeting process. Over the recent past, the company has averaged a return on equity of 12% and a return on investment of 9%. The company can

    asked by Linda
  238. english

    for my comparison essay i am analysis of the 2nd device for katy perry song fireworks.. i need help explaining this line into details. could somebody give me like at least 1-2 sentence explaining it. the device im using is imagery and the line is:“After

    asked by lalala
  239. English

    When do you use "will" to make an offer or request? 1) Will you have a sandwich? Will you do me a favour? 2) Will you want me to (is not possible) 3) I need other examples. 4) Will you have your children picked up from school(is not possible)

    asked by Henry2
  240. math146

    equation for subtract the result in C form the result in A ... is it C - A

    asked by MAYA
  241. chemistry

    how many hydrogens would there be in 2,5,6 trimethylnonane and how do you find them

    asked by lauren
  242. to Ms. Sue

    I would like to thank you Ms. Sue I am starting to understand Distributive property more now. I didn't really understand was because the subsitute didn't really explain it that well. So thank you!!!! :-) :)

    asked by saranghae12
  243. Basic math

    The company Acceptance had employees with monthly salaries of $1,700, $1400, $7,000, $1550, and $2,500. Find the median of these salaries. How do I answer this?

    asked by Ruby
  244. History

    What types of stoves were used during 1692? And specifically if you know what type was used in Salem?

    asked by Anonymous
  245. ap chemistry

    How many grams of ammonium

    asked by jenell
  246. physics

    A piano of mass 800 kg is hoisted up to a 15 meter height. Just then, the rope breaks with the piano plummeting down to the ground. What is the velocity of the piano when it strikes the ground?

    asked by pakilina
  247. psychology

    I need articles that show how music improves memory? My school's database is not working, so if anyone has links to specific websites (not Google-I know how to do that) it would be appreciated

    asked by Anonymous
  248. MATH PLEASE HELP

    Given: Let f: X -> Y be a function. Then we have an associated function f^(-1): P(Y) -> P(X), where f^(-1) (B)⊂X is the inverse image of B⊂Y. Question: Show that f^(-1) is one-to-one if and only if f is onto. [Notes: ⊂ represents subspace, I just

    asked by Nic
  249. Organic Chemistry!

    Hi, I'm just really confused about how to explain the electrophilic and nucleophilic reactions. For instance, if you have an alkene and bromine molecules, they undergo electrophilic addition, because the alkene has an electron rich pi bond. But do you

    asked by Hailey
  250. math

    a savings account has increased over a 12 month period from 8765 to 9006.04. No deposits or withdrawals were made. What percent interest did he receive in a 12 month period

    asked by ann
  251. math

    blank times 14=a where a is greater than 100

    asked by ambriel
  252. math

    blank times 24 equal b where b is less than 100

    asked by ambriel
  253. math

    a phone company wants to create some new area codes. each area code will be 3 numbers . using the digits 1,5,and 7 only once in each code, how many codes can the phone company create?

    asked by joe
  254. Math

    28% of what number is 3 1/2 ? Is 12.50 the answer?

    asked by Tonya
  255. English

    I'm posting you the ones I'm most doubtful of. 1) Where can I find a complete list of uncountable nouns in English? 2) What kind of television programmes do you like watching? I like watching current affairs programmes so I can keep up to date with what

    asked by Henry2
  256. world history

    One of the benefits that the Mongols brought to Russian lands was

    asked by tasha
  257. world history

    Which pope wanted Christians to unite to redress what he saw as an imbalance of power between Christianity and Islam

    asked by tasha
  258. Math

    Sidney told sam that that he would love a lot that is a trapeziod shape and is being sold for $25,000. It is a regular trapeziod with the top being 500' the sides being 250' each and the bottom being 1000'. George doesn't know if it's worth it so he wants

    asked by Kate
  259. Math

    If the value of $1 is 1.082431 in one year at 8 % compounded quarterly, what is the effective interest rate? (a)82.4% (b)8% (c)0.824% (d)8.24% (e)824.31%

    asked by Mathew
  260. MATH

    What are the factors of 65

    asked by Austin
  261. apa format

    when doing references for a paper-do we include all the page numbers (the whole article) or just the page number that I'm citing from

    asked by Anonymous
  262. math

    out of 150 students, 20% of them earned straight A's. how many students earned straight A's?

    asked by matthew
  263. Nutrition

    how do you determine the total lethality (in equivalent D250 minutes) of a thermal process?

    asked by Ainsley
  264. Chemistry

    My mobile phase for HPLC (High Performance Liquid Chromatography) test consists of 3 components in the ratio 5:250:745. In preparing the mobile phase, is it advisable to first measure 745ml of component A, followed by 250ml of component B and lastly 5ml of

    asked by angie
  265. science

    How much potash alum is prepared by 6g Al2(SO4)3 & 1.5g K2SO4?

    asked by Meena Garg
  266. URGENT Chemistry question

    a chemist wanted to make 100 grams of SO2. She had only 12 grams of sulfur and 4 grams of oxygen. Unfortunately, the amounts of reactants were not enough to make the desired product. How much S and O2 would she need in order to obtain the desired grams of

    asked by jermain
  267. MATH help

    Please explain to me why they are exclusive or not exclusive. Event A is that atleast three of toni's five cousins are female Event B is that atleast three of toni's five cousins are male.

    asked by HM
  268. English

    which way is correct Tuesday November 1st, 2011 or Tuesday, November 1st, 2011?

    asked by Mina
  269. English Captilization

    I just want to know if i got all of these quiz questions right for captilization. Thanks 1. Which answer best fits into the blank? Drive _____ on I-270 to get to Grove City. A.South B.south C. the south I think it is B. 2. Which answer best fits into the

    asked by Anonymous
  270. math

    tony want to be a magician but the book said she needed to learn at least 100 magic tricks. if he learns 14 tricks each week how long willit take him to learn 100 magic tricks?

    asked by Anonymous
  271. chem

    what is not a function of specific rotation temperature concentration wavelength

    asked by lo
  272. basic math

    I am not sure the solvent in this problem, as far as what you do when lining this problem up. The math problem..... Add 150 and 93.17. I don't know if I should be placing 150 at the first decimal or the second. I know I would usually do 150.00 93.17 but

    asked by kristen
  273. Chem

    middle-aged man has been diagnosed as being at high-risk of developing Coronary Artery Disease. •State the chemical composition of the sterol that is present in high levels in most people who belong to the high-risk group. •Distinguish between the

    asked by Anonymous
  274. General Chemistry 1

    What is the FBF bond angle for BF^4- ?

    asked by Courtney
  275. algebra

    order from least to greatest. -1/4, -2/3, 7, -8, 9

    asked by Angela
  276. social

    Why did christianity become the religion of western civilization?

    asked by jon
  277. math

    4x-8=28. find x

    asked by mike
  278. english

    Most people need a budget, a plan for keeping track of their income and expences. is the comma in the right place?? thank you

    asked by jill
  279. math

    31 x 19 array and an expanded algorithm

    asked by larry
  280. trig

    y= -(x-5)2 -3

    asked by shanteria
  281. History

    What would best describe a southern planters world accuratley?

    asked by Anonymous
  282. English

    Could you please check these sentences? Thank you very much. 1) Young people aged between 12 and 16 lived and worked for forty days without adults to see if they were able to survive without them. Some of them didn't like being folled by cameras when they

    asked by Henry2
  283. math

    kayla spends $48 on gym clothes. she buys at least of each item. shorts cost $16, t-shirt cost $18 and socks cost $2 a pair how many ways can kayla spend $48 on her gym clothes

    asked by b renda
  284. MATH

    0.11966667 round to the tenths would it be 0.120

    asked by Adam
  285. math

    tony want to be a magician but the book said she needed to learn at least 100 magic tricks. if he learns 14 tricks each week how long willit take him to learn 100 magic tricks?

    asked by Anonymous
  286. Algebra 1

    What is the answer to 10-3x is less than or equal to 7x? I tried the problem, but I keep getting x is less than or equal to 1. Is that right?

    asked by Sara
  287. english

    for my comparason essay. now that i have finished every paragraph except the conclusion paragraph. so far i got: Miley Cyrus’s argument for how every person is an individual is more compelling than Katy Perry’s argument to just express your self. The

    asked by lalala
  288. math

    blank times 24=B where B is less than 100

    asked by ambriel
  289. math

    solve 7^(11/13) would the answer be 7^-2 don't you subtract the Poweras or is it 2/7?

    asked by Abby F
  290. math

    If a shapes area is 48 cm and the perimeter is 38 cm then what does the shape look like?

    asked by Anzzy
  291. natural disasters

    i need a creqative way to memorize this things for my upcoming test next week. 1)plates tetonics 2)shockwaves after earthquakes 3)tsunami 4)volcanoes

    asked by lalala
  292. arithmetic

    on a ruler where is the 32nd?

    asked by Anonymous