Questions Asked on
April 2, 2013

  1. math

    1) An antique dresser was purchased for $7500 in 2005. The dresser increases in value by 9% per year. Find the value of the dresser in 2025. 2) a) Find the slope of the secant to the curve f(x) = 0.25(4)^(x) - 2 between: p1) x=0 and x = 1 p2) x=0 and x=0.5

    asked by Jonathan
  2. math

    Inflation is currently causing the cost of items to increase by about 2.5% per year. In 2009 a litre of gasoline costs approximately $0.90. What will it cost to fill a 60 litre gas tank 10 years from now. Round your answer to the nearest dollar. Name at

    asked by Daniel
  3. physical science 2nd semester

    what is the reactant in this equation ?2HBr(aq)+ca(OH)2(aq)-->2H2O(i)+CaBr2(aq)

    asked by josh
  4. Math

    Jeremy and Cynthia leave at the same time to travel 75 miles to an area. Jeremy drives 15 miles in 12 minutes. Cynthia drives 26 minutes in 20 minutes. If they continue at the same rates, who will arrive at the area first?

    asked by Alyssa
  5. stats

    Given a standard normal variable. What is the probability that z lies between 1.48 and 2.13

    asked by chris
  6. stats.

    The amount that airlines spend on food per passenger is normally distributed with mean $8.00 and standard deviation $2.00. What is the probability that a randomly selected airline spends more than $12.50.

    asked by chris
  7. stats.

    The mean number of bumped airline passengers per day s 1.35 and the standard deviation is 0.25. For a random selection of a group of 40 days, what is the probability that the mean number of bumped passengers for the 40 days will be between 1.25 and 1.50?

    asked by chris
  8. physics

    define waves

    asked by alax
  9. physic

    what is a wave?

    asked by alax
  10. health

    what can a person do to foster a positive self image?

    asked by Anonymous
  11. physic

    Three 30mm diameter cables support the car in a cable elevator. Inside the car is a safety notice. SAFE WORKING LOAD 33 PERSONS 2244 KG The yield stress of the cables is 200MPa. What factor of safety has been applied at the safe working load? Factor of

    asked by alax
  12. math

    Flight Path. In this problem you will use a cosine function to model the flight path of a plane that begins its descent from 20000 ft when it is 45 miles from the airport. Find the fuction p(x)= ACos(wx)+B that that gives the altitude in ft when the plane

    asked by T-Man
  13. Spanish 2

    Conjugate Past Tense Resulta que todo el mundo _____ que mi novio me estaba enganando porque el ____ con otra chica y los dos estaban bailando juntos y besandose toda la noche. Choices: decir, tener, querer, poner, saber, poder, and venir I tried different

    asked by Jayda
  14. Math/ Calculus Please HELP!!!

    An object at rest begins moving horizontally on the x-axis, starting at position x(t) = 0 feet at time t = 0 seconds.Suppose, after exactly 2 seconds we measure the position of the object to be 3 feet to the right of the origin AND measure the object to be

    asked by Marto
  15. Chem

    Predict the values of m/z and the most abudent fragments you would observe in the mass spectrum of di-n-propyl ether?

    asked by Anonymous
  16. Chem

    Predict the values of m/z and the most abudent fragments you would observe in the mass spectrum of di-n-propyl ether?

    asked by Anonymous
  17. 7th Grade Language Arts URRGEENT!!!!

    What was the first South American nation to receive independence? (1 point) Chile Argentina Paraguay Brazil ok this question IDK... however I think it's Chile OR Argentina though to be honest idk I've read the book 17 times (i counted) I looked it up in

    asked by Gabby
  18. Physiology

    How does nervous system control the activity of writing

    asked by Jumoke
  19. MAths algebra

    A rectangular plot measures 16 meters by 34 meters ,find the distance from one corner of plot to the corner diagnolly opposite Answer is 38 meters

    asked by Firdous
  20. MAths algebra

    Consecutive bases of a square shaped baseball diamond are 90 feet apart .Find to the nearest tength of a foot the distance from first base diagonally across the diamond to third base

    asked by Firdous
  21. MAths algebra

    A diagonal of a square parking lot is 75 meters.Find to the nearest meter, the length of a side of a lot

    asked by Firdous
  22. maths algebra

    Suppose that there is a cube with edges 12 centimeters in length.Find the length of a diagonal from a lower corner to the diagonally opposite upper corner .

    asked by Firdous
  23. MAths algebra

    Suppose that there is a rectengular box with a length of 8 centimeters a width of 6 centimeters and a height of 4 centimeters.Find the length of a diagonal from a lower corner to the upper corner diagonally opposite. Answer is 10.8 centimeters

    asked by Firdous
  24. algebra!!!!

    The population in a town called Atown in December 1900 is a perfect square. In January 1901, 48 people moved in, and the population is 1 more than a perfect square. In February 1901, 48 more people moved in, and the population is a perfect square. Assuming

    asked by please help me out!!
  25. GEOMETRY(POLYGON)

    A regular polygon has interior angles of 150∘. A,B,C,D are 4 consecutive points of this polygon. What is the measure (in degrees) of ∠ADC?

    asked by please help me out!!
  26. GEOmetry(Special Coin Placement)

    Three coins are randomly placed into different positions on a 4×10 grid. The probability that no two coins are in the same row or column can be expressed as a/b where a and b are coprime positive integers. What is the sum of a+b?

    asked by please help me out!!
  27. physics

    I am helping my friend move into his new apartment. During the move, we have to load boxes into the back of his truck. To make it easier to load them, we've set up a metal ramp so that we can slide the boxes up to the deck of the truck. The box shown in

    asked by Dan
  28. PROBAbility!!!!

    A bag contains 150 balls numbered 1 through 150. Three balls are drawn and placed on the table. The probability that the balls were drawn in increasing order can be expressed as a/b where a and b are coprime positive integers. What is the value of a+b?

    asked by please help me out!!
  29. simple PHYISCS

    A teenager accidentally falls off a 10 m high platform diving board. His friend whips out his camera and takes a picture when the teenager is halfway to the water below to commemorate the embarrassing event and post it on Facebook. How many seconds after

    asked by Anyone....out...help..please!!!
  30. PHYSIcs!!!

    You want to figure out how fast you can throw a ball, but don't have access to a radar gun. You measure the height from the ground to your hand as you throw and discover that when you throw a ball it leaves your hand at a height of 2 m from the ground. You

    asked by Anyone....out...help..please!!!
  31. physics...

    A kayaker paddles due north at 2 m/s. The river the kayaker is paddling in flows towards the east at 1 m/s. After 5 seconds of paddling, how far is the kayaker from where she started in m?

    asked by HELP ME...uRGENT!
  32. physics

    You and your friend, both of mass 70 kg, are playing catch with a frisbee on frictionless ice. Initially, you are both at rest. You throw a 0.175 kg frisbee at 10 m/s horizontally at your friend, who catches it. After they catch the frisbee, what is the

    asked by HELP ME...uRGENT!
  33. physics

    block 1 has mass m1 = 480 g, block 2 has mass m2 = 540 g, and the pulley is on a frictionless horizontal axle and has radius R = 5.2 cm. When released from rest, block 2 falls 76 cm in 5.2 s (without the cord slipping on the pulley). What is the pulley's

    asked by Ashley
  34. Math

    If y = sin−1 x, then sin y = x,−π/2 ≤ y ≤ π/2. Therefore, to find y = sin−1(−3/22, we must find an angle y whose sine is -3/2. There are many possible angles with this sine, but the range of y = sin−1 x is restricted to [ , ] and so y must

    asked by HELP!!!!
  35. biology

    ) To test linkage between the feather texture and feather color genes you complete a test cross with the F1, and find that the feather texture and feather color genes are linked. Only part of the data from the test cross is given below. Complete the table

    asked by john
  36. DPS

    An isotope has a 12.4 hour half life. If it has an activity of 30mCi at noon today, what was its activity at 3 p.m. yesterday?

    asked by Gajender Goswami
  37. machanics

    A space aircraft is launched straight up.The aircraft motor provides a constant acceleration for 10 seconds,then the motor stops.The aircraft's altitude 15 seconds after launch is 2 km.ignore air friction .what is the acceleration,maximum speed reached in

    asked by shone
  38. chemistry

    Rank these elements according to electron affinity. Br, S, Ne most energy released by gaining an electron: most energy absorbed by gaining an electron:

    asked by anonymous
  39. Chemistry

    The sizes and shapes of the hydrogen atom orbitals was revealed through graphical analysis of the corresponding wave functions. These wave functions also predict areas that the electrons have a zero probability of being found. These areas are known as

    asked by anonymous
  40. Chemistry

    What would be the speed of the following particles if they had the same wavelength as a photon of green light (λ = 500.0 nm)? Proton (mass = 1.673*10^(-24)g) =_____ neutron (mass = 1.675*10(-24)g) =_____ electron (mass = 9.109*10^(-28)g) =_____ alpha

    asked by Anonymous
  41. chemistry

    Suppose you take a trip to a distant universe and find that the periodic table there is derived from an arrangement of quantum numbers different from the one on Earth. The rules in that universe are: 1. principal quantum number n = 1, 2, . . . (as on

    asked by Anonymous
  42. Chemistry

    To resolve an object in an electron microscope, the wavelength of the electrons must be close to the diameter of the object. What kinetic energy must the electrons have in order to resolve a protein molecule that is 2.10 nm in diameter? Take the mass of an

    asked by Anonymous
  43. chemistry

    The first ionization energy of a carbon atom is 1.81 aJ. What is the frequency and wavelength, in nanometers, of photons capable of just ionizing carbon atoms? v=______s^(-1) lambda =_____nm Assuming an ionization efficiency of 47.0%, how many such photons

    asked by Anonymous
  44. chemistry

    The first ionization energy of a carbon atom is 1.81 aJ. What is the frequency and wavelength, in nanometers, of photons capable of just ionizing carbon atoms? v=______s^(-1) lambda =_____nm Assuming an ionization efficiency of 47.0%, how many such photons

    asked by Anonymous
  45. chemistry

    Would the following procedural errors result in an incorrectly high or low calculated percent NaOCl in commercial bleach solution? A student failed to allow the volumetric pipet to drain completely when transferring the diluted bleaching solution to the

    asked by Brooke
  46. Please solve it.Logarithm

    Please help me because I do not any idea in Logarithm topic.Solve for the value of X: 6log(x^2+1)=5

    asked by Seth
  47. advance functions gr 12

    use the asymptotes and intercepts to make a quick sketch of the function f(x)= x-2 (numerator) x+4(denominator) and its reciprocal f^r = x+4 (numerator) x-2 (denominator) on the same set of axes. b) describe the symmetry in the graphs in part a) c)

    asked by james
  48. advance functions gr 12

    Using rational functions solve 7+ 1(numerator) x (denominator) = 1 (numerator) x-2(demominator)

    asked by james
  49. physics

    Find modulus,Direction cosines,Unit vectors of (1)4a-2b+c,(2)a-7b+5c,(3)4a-3b+c.

    asked by Samson
  50. physics

    Find modulus,Direction cosines,Unit vectors of (1)4a-2b+c,(2)a-7b+5c,(3)4a-3b+c.

    asked by Samson
  51. Physics

    Mars has a mass of about 6.09x10^23 kg and it's moon Phobos has a mass of about 9.4 x10^15N how far apart are mars and Phobos? The value of the grav constant is 6.673 x10^-11 answer in units of N

    asked by Lexi
  52. math

    Which of the following could NOT represent the intersection of a plane and a triangular prism? A. a triangular prism B.a triangle C. a rectangle D. a point I had D, a point because if you cut a triangle in half you can not get a point out of it. If this is

    asked by B6
  53. Physics

    A helium-4 atom falls from a height h into a tank of gaseous helium atoms at 300 K. What is h in meters if the temperature of the helium atoms remains at 300 K after the falling atom enters the tank? Details and assumptions The acceleration of gravity is

    asked by Crow
  54. Physics

    A plane flies horizontally at constant ground speed v=720km/h. The pilot is informed by an air traffic controller that he must immediately change his direction of flight while keeping the same altitude. The pilot performs a turning maneuver by rolling the

    asked by Crow
  55. Math

    Let f(x)=x2−1. How many distinct real roots are there to f(f(f(x)))=0?

    asked by Crow
  56. physics

    A space aircraft is launched straight up. The aircraft motor provides a constant acceleration for 10seconds, then the motor stops. The aircraft's altitude 15seconds after launch is 2km. Ignore air friction. Determine (i) the acceleration, (ii)the maximum

    asked by Kemmone
  57. science "Genetics" Mendel

    You are studying genetics in domestic chickens (Gallus gallus) and you find a mutant with no wings. Assume that the mutant wingless phenotype is due to a mutation at a single gene. In contrast to mammals, chickens use ZZ/ZW sex-linkage. That is, male

    asked by grad2013
  58. World Geography

    In any particular culture, an idea or way of doing things that is common to the culture is called a ____________. A. cultural landscape B. culture C. cultural trait D. cultural norm

    asked by abreanna
  59. physics111

    a river flows due south with a speed of 2.0m/s. a man steers a motorboat across the river;his velosity is 4.2m/s due east.the river is 800m wide. (A) what is his velocity(magnitude and direction)relative to the earth? (B)how much time is required to cross

    asked by yonela
  60. Biology "Genetics"

    Red-green Color Blindness and Hemophilia A are both sex-linked traits in humans. Both genes are on the X-chromosome and are tightly linked. Consider the pedigree below. Individual 1 is homozygous normal. Individual 2 is both red-green color blind and a

    asked by grad2013
  61. math

    y1=6+2x x1 y1 -3 ? -2 ? -1 ?

    asked by lily
  62. information Literacy

    in the subject guide search on edseek's homepage enter the following subject term: paleobotany. Based on the results from this search, choose the best answer to this question

    asked by Anonymous
  63. Math algebraic factprization

    1) (x+3)^2 - (x+1)^2 2) (x-4)^2 - 16(x+2)^2

    asked by Jim
  64. Math

    Algebraic factorization 1) (x+3)^2 - (x+1)^2 2) (x-4)^2-16(x+2)^2 3) 4(x+1)^2 -(2-x)^2

    asked by Jim
  65. English

    The sure solution to unemployement is a better quality of education

    asked by Valencia
  66. math

    HOW YOU CAN PREPAIR 1M OF SODIUM CHROLIDE IN 250CMCUBE

    asked by carina
  67. MATH

    Below are some sale prices for soda .Which offers the best price ? a. 6 for $1.75 b.8 for $1.90 c.12 for $3.15 d.30 for $7.50

    asked by CARINA
  68. Math

    if kelly gave 1/3 of a pizza to holly and 1/5 to diane how much did she have left

    asked by Kelly
  69. Chemistry

    At the normal boiling point of toluene,Δ Hvap=33.2 kJ/mol and ΔSvap= 86.5J/mol•K. What is the normal boiling point of toluene?

    asked by Viv
  70. Math

    A newly designed international airport is planning to label its gates. Each gate must be assigned a letter from the alphabet from A to M (13 in all), and a number from 1 to 15. To avoid confusion, any two gates must be assigned a different letter, or a

    asked by Hale
  71. pre calculus

    1.)A utility company has the following rate schedule for natural gas usage in a city’s business district: Monthly service charge: $8.80 Per therm service charge 1st 25 therms : $0.6686/therm Over 25 therms: $0.85870/therm (a) What is the charge for using

    asked by alexis
  72. pre calculus

    2. Graph the following function using transformations. Be sure to graph all of the stages on one graph. State the domain and range. y= -2 lxl +2 For example, if you were asked to graph y= x^2 + 1 using transformations, you would show the graph of y= x^2

    asked by michelle
  73. math

    A carpenter is building rectangular walls for a room addition. The width of a section of wall is two times the height h. Each section has a brace that connects two opposite corners of the section. What is a simplified expression for the length of a brace?

    asked by Jane
  74. Physics

    A player kicks a soccer ball from ground level and sends it flying at an angle of 30 degrees at a speed of 26 m/s. How far did the ball travel before it hit the ground? Round the answer to the nearest meter.

    asked by Anonymous
  75. math

    A walking path is shaped like a rectangle with a width 7 times its length "l". What is a simplified expression for the distance between opposite corners of the walking path?

    asked by Jane
  76. Math

    A newly designed international airport is planning to label its gates. Each gate must be assigned a letter from the alphabet from A to M (13 in all), and a number from 1 to 15. To avoid confusion, any two gates must be assigned a different letter, or a

    asked by Mark
  77. advance functions gr12

    use the asymptotes and intercepts to make a quick sketch of the function f(x)= x-2 (numerator) x+4(denominator) and its reciprocal f^r = x+4 (numerator) x-2 (denominator) on the same set of axes. b) describe the symmetry in the graphs in part a) c)

    asked by james
  78. advance functions gr12

    Using rational functions solve (7+ 1)/x = 1/(x-2)

    asked by james
  79. Physics

    Find the frequency of a sound wave moving in air at room temperature (20.0) with a wavelength of 0.667 m. Is the formula F=1/T?

    asked by Denise
  80. advance functions gr12 HELP ASAP

    using rational functions solve (x+5)/(x-3)= (2x+7)/(x) thank you

    asked by ALEX
  81. Chem

    a gas has a volume of 410 mL at 27 degrees c and 740 mm Hg. what volume would this gas occupy at STP?

    asked by Anonymous
  82. Chem

    a gas has a volume of 410 mL at 27 degrees c and 740 mm Hg. what volume would this gas occupy at STP?

    asked by Anonymous
  83. algebra

    Can anyone help explain how to work this problem out? One factor in flood safety along a levee is the area that will absorb water should the levee break. the coordinates that make up the boundry area are (0,0),(2.8,2.1)and(4.3,4.4) what is the area of the

    asked by lee
  84. Physics

    The coil in the figure below contains 425 turns and has an area per turn of 3.00 10-3 m2. The magnetic field is 0.21 T, and the current in the coil is 0.27 A. A brake shoe is pressed perpendicularly against the shaft to keep the coil from turning. The

    asked by Anonymous
  85. Math

    A state lottery requires you to choose 4 cards from an ordinary deck: I heart, 1 club, 1 diamond, and 1 spade in that order from the 13 cards in each suit. If all four choices are selected by the lottery, yo win $5,000. It costs $1 to play. Find the

    asked by Devin
  86. advance functions gr12 (SORRY LAST ONE HAD A TYPO)

    Using rational functions solve 7+ (1)/x = 1/(x-2)

    asked by james
  87. math

    how much is 12 quarters?

    asked by me
  88. algebra

    For problems 13 and 14, assign each letter and a blank space to a number as shown by the alphabet table below. Use the code [1,-2_-3,7] encode the phrase "ONE QUESTION TO GO" The matrix C=[1,-2_-3,7] was used to encode a phrase to

    asked by lee
  89. math

    A gardener is mowing a 20 yard-by-40 yd rectangular pasture using a diagonal pattern. He mows from one corner of the pasture to the corner diagonally opposite. What is the length of this pass with the mower? Give your answer in simplified form. Please

    asked by Jane
  90. Chemistry

    The enthalpy of vaporization of chloroform (CHCl3) is 29.2 kJ mol-1 at its normal boiling point 61.2 Celsius. what is the standard change in entropy for vaporization of chloroform at its normal boiling point? Answer I got was 29.2/334.2 = 0.0873.

    asked by Viv
  91. college algebra

    How much paper would you need to wrap a box 10cm wide, 25cm high, and 50cm long?

    asked by tom
  92. 7th Grade Language Arts~!!!

    What was the first South American nation to receive independence? (1 point) Chile Argentina Paraguay Brazil My Answer: 1) Argentina Is this correct?

    asked by Gabby
  93. maths

    A group of 5 people are going to meet weekly at the library for 4 weeks. Each week, two people are selected at random to speak. Each person may speak in multiple weeks, but no pair of people will speak together more than once. The probability that there is

    asked by stranger
  94. math

    2y(4y-2) simplify help

    asked by Boobear
  95. geometry

    a point F is at a certain distance from a line AB .Another point P is moving in a plane such that the ratio of it's distance from F and line AB remains constant .find the locus of the point P

    asked by mani
  96. college algebra

    f(x)=√x-2 Find the domain of the function is it x-2 the range of function is it (00,-2) the domain of the inverse is it x>-2 The range of the inverse is it (-2,00) Thanks

    asked by Anonymous
  97. advance functions gr12 HELP ASAP

    Using rational functions solve 7+ (1)/x = 1/(x-2) thank you

    asked by james
  98. advance functions gr12 HELP ASAP

    use the asymptotes and intercepts to make a quick sketch of the function f(x)= x-2 (numerator) x+4(denominator) and its reciprocal f^r = x+4 (numerator) x-2 (denominator) on the same set of axes. b) describe the symmetry in the graphs in part a) c)

    asked by james
  99. Algebra

    Find the range of the function rule y = 5x - 2 for the domain D = {-5, -1, 0 2, 10}

    asked by Anonymous
  100. Physics

    What is the wavelength of a 512 Hz sound wave in 20 degree C air?

    asked by Kari
  101. geography

    Check my answers, please? I put an asterisk next to which ever ones are my answer. Thanks! Why do you think the Inuit have retained aspects of their early culture? *A.because they are used to that lifestyle B.because such adaptations allow them to survive

    asked by anon
  102. Physics

    Joe stands 150 m from the edge of a canyon wall. How long will it take him to hear his echo if the air temperature is 250 degree C?

    asked by Stephanie
  103. advance functions gr12

    write an equation for a rational function whose graph has all of the indicated features: -vertical asymptote with equation x=3 -horizontal asymptote with equation y=2 -hole at x=1 no x intercept thank you

    asked by sam
  104. Physics

    Jill screams and hears her echo 4.4 seconds later. How far from the canyon wall is she if the air temperature is 25 degree C?

    asked by Stephanie
  105. Physics

    One way to determine the distance to the moon is to bounce a laser beam off a mirror on its surface. How far away is the moon if it takes 2.56 seconds for the laser to "echo" off the moon?

    asked by Denise
  106. 7th Grade Social Studies

    1. Which of the following are accomplishments of the Incas? (1 point) pyramids floating gardens hieroglyphics roads and aqueducts 2. All of the following contributed to the Spanish victory over the Aztecs except (1 point) disease wiped out many of the

    asked by Anonymous
  107. chemistry

    Write the complete structures (don’t forget the lone-pairs) for the following compounds: C2H5OH; HOCH2CH2NH2; HOCH2CH2NH2; CH3NH2; CH2Cl2

    asked by nicole
  108. Calculus

    The altitude (in feet) attained by a model rocket t seconds into flight is given by the function h(t) = -1/3t^3 + 4t^2 + 20t + 2,for t _> 2 a)Find the maximum altitude attained by the rocket. b)Why does it not make sense to use this function after t = 16

    asked by Deeno
  109. Alg 1

    Simplifying Radicals A gardener is mowing a 20-yd-by-40 yd rectangular pasture using a diagonal pattern. He mows from one corner of the pasture to the cxorner diagonally opposite. What is the length of this pass with the mower? Give your answer in

    asked by Jane
  110. physics

    A rocket ship at rest in space gives a short blast of its engine, firing 26 kg of exhaust gas out the back end with an average velocity of 182 m/s. What is the change in momentum of the rocket during this blast?

    asked by Marty
  111. Calculus

    If a company’s sales (in millions of dollars) for time t months is given by f(t) = 0.003t^3 + 0.5t^2 + 2t + 3 a. Find f'(t). b. Find f'(5). c. What does this tell you about the company’s position in the month of May (i.e.,t = 5)?

    asked by Deeno
  112. math

    If line 1 passes through (2, -6) and (-2, -2) and line 2 passes through (-3, 2) and (2, 12), where will line 1 and line 2 intersect? a)(-4,0) b)(-2,-3) c)(-6,2) d) (-2,-2)

    asked by lily
  113. math

    Look at the revenue for videos rented (v) on a given day at two different video rental stores below r = 2v + 10 r = 1.6v + 18 After how many video rentals will the revenues of both stores be equal? a)25 b)45 c)70 d)20

    asked by joe
  114. Maths

    How many ordered sets of positive integer triples (a,b,c) are there such that a+b*c=100

    asked by Mary
  115. Math

    David and Joseph have a total of 328 marbles. Matthew and David have 176 marbles. Joseph has 5 times as many marbles as Matthew. How many marbles does Davis have?

    asked by Janet
  116. math

    if i had 7 bags of sand that were 2/3 full and i had 14 pounds of sand how much would it take to fill each one?

    asked by Anonymous
  117. Biology

    I'm doing a lab for gel electrophoresis and we added the digests in the wells of the agarose gel Lane 2 – λ Hind III (a standard) Lane 4 – Tube 1 Lane 5 – Tube 2 Lane 6 – Tube 3 Lane 7 – Tube 4 Now will DNA in tube 1 which only has dh20, 10x

    asked by Michelle
  118. Maths

    The vertices of a cube are labeled with the numbers 0,1,2,3,4,5,6 and 7, such that no two vertices are labeled with the same number. The sum of any 2 numbers on an edge is prime. What is the maximum sum of the 4 numbers on a face?

    asked by Mary
  119. Physics

    Two lenses are in contact. One of the lenses has a focal length of +10.0cm when used alone. When the two are in combination, an object 20cm away from the lenses forms a real image 40cm away from the lenses. What is the focal length? I am not sure how to

    asked by Jul
  120. Physics

    Jill screams and hears her echo 4.4 seconds later. How far from the canyon wall is she if the air temperature is 25 degree C?

    asked by Cindy
  121. Maths

    Suppose Z=a+bi , where a and b are integers and i is the imaginary unit. We are given that |1+iZ| = |1-iZ| and |Z-(13+15i)|

    asked by Mary
  122. Physics

    What is the wavelength of a 512 Hz sound wave in 20 degree C air?

    asked by Mary
  123. Physics

    What is the frequency of a wave that has a period of 5.0 seconds?

    asked by Denise
  124. Applied Calculus

    For its beef stew, Betty Moore Company uses aluminum containers that have the form of right circular cylinders. Find the radius and height of a container if it has a capacity of 29 in.3 and is constructed using the least amount of metal. (Round your

    asked by Jacob
  125. Armwood

    Abby’s bus left at 2:00, going southbound at 55 mph. Bob’s went northbound starting at 3:00, going only 45 mph. How long will it take for them to get 420 miles apart? Round to the nearest tenth if necessary

    asked by Anonymous
  126. math

    Flight Path. In this problem you will use a cosine function to model the flight path of a plane that begins its descent from 20000 ft when it is 45 miles from the airport. Find the fuction p(x)= ACos(wx)+B that that gives the altitude in ft when the plane

    asked by tom
  127. Chemistry

    At a certain temperature, the equilibrium constant for the following chemical equation is 2.00. At this temperature, calculate the number of moles of NO2(g) that must be added to 2.64 mol of SO2(g) in order to form 1.10 mol of SO3(g) at equilibrium. SO2(g)

    asked by Dee
  128. math

    find the exact value of [sec(-30 degrees)- cot 120 degrees]/1-cosec^2(45 degrees) Find the exact value of [sin^2(355 degrees) + cos^2 (355 degrees)]/ tan^2 (30 degrees)

    asked by lindsay
  129. Chemistry

    Phosphorus pentachloride decomposes according to the chemical equation PCl5(g) ⇌ PCl3(g) + Cl2(g) A 0.304 mol sample of PCl5(g) is injected into an empty 4.75 L reaction vessel held at 250 °C. Calculate the concentrations of PCl5(g) and PCl3(g) at

    asked by Dee
  130. Chemistry

    At a certain temperature, the Kp for the decomposition of H2S is 0.755 H2S (g) H2 (g) + S (g) Initially, only H2S is present at a pressue of 0.201 atm in a closed container. what is the total pressure in the container at equilibrium?

    asked by Dee
  131. Chemistry

    If a 4.30 M sample of A is heated to 500 K, what is the concentration of B at equilibrium? A(aq) -->

    asked by Dee
  132. Chemistry

    At equilibrium, the concentrations in this system were found to be [N2]=[O2]=0.100 M and [NO]=0.500 M. The balanced chemical equation is N2+O22NO. If more NO is added, bringing its concentration to 0.800 M, what will the final concentration of NO be after

    asked by Dee
  133. maths-statistics

    The median of the following incomplete frequency distribution is 10: x= 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 f= 0 , 2 , 5 , 6, 3 , 1 , 2 , Y Calculate the frequency of 8

    asked by anoynomous
  134. life orientation

    Human and environmental factors that causes ill-health,sickness,trauma,accidents,crises and disaster

    asked by khanyisile
  135. science

    Calculate the de Broglie wavelength of a 0.44 kg ball moving with a constant velocity of 26 m/s (about 60 mi/h).

    asked by annie
  136. Physics

    An iron railroad track 1000 feet long is at a temperature of 0 oC. How much does it expand when heated to 33 oC?

    asked by Marie
  137. math

    A rectangular room has an area of 120ft squared. Marge drew a scale drawing of the pool using the scale 1.5cm=2ft. What was the area of the scale drawing? a) 213.3cm2 b) 67.5cm2 c)53.3cm2 d)1.5cm2 I don't think any of the choices match the answer (90cm2)?

    asked by pitigoiu
  138. MAth

    14% of students say they love school. If 8 students are chosen at random, what is the probability that at least one of them loves school?

    asked by Anonymous
  139. MAth

    14% of students say they love school. If 8 students are chosen at random, what is the probability that at least one of them loves school?

    asked by Anonymous
  140. Chemistry

    Calculate the mass of 0.0122 moles of: a) Si3N4 b) (CH3)3 N

    asked by Madison
  141. calculus

    An airplane is flying at a velocity of 300km/h S30degrees W in a wind blowing at a velocity of 50km/h S20degrees E. What is the true speed and direction of plane?

    asked by Nasi
  142. SCIENCE/ECOLOGY

    I NEED HELP IN PREPARING A DEMOPRAPHIC AND ENVIRONMENTAL TIMELINE WHICH INCLUDES DEATH RATES, BIRTH RATES, POPULATION CHANGES, AND MAJOR HISTORY CHANGES

    asked by EVELYN
  143. maths-statistics

    If the mean of y1 and y2 is M1 and that of y1, y2, y3, y4 is M2, the mean of ay1, ay1.y3/a, y4/a is

    asked by anoynomous
  144. life Orientation

    ways in which you critically discuss how life style/behaviour diseases impact on the teenage

    asked by ronewa
  145. agriculture

    outline and explain the objectives of fencing a farmland

    asked by lucas
  146. geometry

    n the xy -plane, the graph of y = x^2 and the circle with center (0,1) and radius 3 have how many points of intersection?

    asked by naomie
  147. agriculture

    what are the important features of a building which could be used as a milking shed(parlour),dairy(milk room) and food store to ensure production of clean fresh milk?

    asked by lucas
  148. physics

    A 75.0 kN truck is parked in the middle of a 20.0 m long bridge. How much force must each end of the bridge exert to support the truck?

    asked by name
  149. agriculture

    state and explain what records should be kept for the efficient management of a dairy herd

    asked by lucas
  150. maths-urgently needed

    If the mean of y1 and y2 is M1 and that of y1, y2, y3, y4 is M2, the mean of ay1, ay1.y3/a, y4/a is

    asked by anoynomous
  151. Math 7

    What type of angle is angle x is clock is used to display the time of 7:15. Each minute represents 6 degrees A. Obtuse B. Acute C. Straight D. Right

    asked by Connie
  152. agriculture

    explain how any three of the records which are kept for the efficient management of a dairy herd be used to improve management

    asked by lucas
  153. Genetics part b only

    You are studying genetics in domestic chickens (Gallus gallus) and you find a mutant with no wings. Assume that the mutant wingless phenotype is due to a mutation at a single gene. In contrast to mammals, chickens use ZZ/ZW sex-linkage. That is, male

    asked by grad2013
  154. physics

    A uniform, 264-N rod that is 2.05 m long carries a 225-N weight at its right end and an unknown weight W toward the left end. When W is placed 47.9 cm from the left end of the rod, the system just balances horizontally when the fulcrum is located 82.7 cm

    asked by Matt
  155. English

    Can someone check these sentences I need to prepare for tomorrow? Thank you. 1) Troy has been at the BRIT School since he was 14. Before that he was in a normal secondary school. 2) Unlike in a normal secondary school, students at the BRIT study all the

    asked by John
  156. agriculture

    name one intensive and one extensive system of poultry farming

    asked by lucas
  157. Chemistry

    A student dissolved the KHP in 100.0mL of water instead of 50.0mL. Will the molar concentration of the NaOH solution determined from titrating be greater, less than, or unaffected by this mistake? Explain.

    asked by Lola
  158. 8th Math - Probability

    A basket contains 5 green lollipops, 12 red lollipops, and 7 orange lollipops. When a lollipop is taken from the basket, it is not replaced. What is P(orange, then orange)? I know the answer. It's 42/552. But HOW do I figure this out? I can do the first

    asked by L0velyLayna
  159. chemistry

    how does the solubility of gases in water compare to the solubility of solids in water as the temperature of the solution increases?

    asked by maggie
  160. Chemistry

    Can the reaction 2Ni(s)+MgSo4(aq) occur.Explain why?

    asked by Anonymous
  161. Statistics

    Two cards are drawn from an ordinary deck of cards, and the first is not replaced before the second is drawn. What is the probability that one card is an ace and the other is a king

    asked by Michelle
  162. Alg 1

    An area rug is shaped like a golden rectangle. Its length is 8 ft. What is the rug's width? Write your answer in simplified radical form and rounded to the nearest tenth of a foot. Please explain how to work this. Thanks.

    asked by Jane
  163. Chemistry

    Of the 3 types of fat, which type of fat would react with the greatest amount of bromine? Least amount of bromine? a. saturated fat b. mono-unsaturated fat c. poly-unsaturated fat

    asked by Ashley
  164. Math

    What is 120.06 / 24? We started a new unit, dividing decimals and I find it hard to understand.

    asked by Anonymous
  165. Math

    A computer technician keeps track of his earnings throughout each month. the technician observes that his earnings are a linear function of the number of hours he works during the month. The technician finds that when he works 55 hours during the month, he

    asked by Jayson Angole
  166. math

    Consider the pair of linear equations below. 4x+6y=12 2x+3y=6 Part A: What is the relationship, if any, between 12 and 6? Part B: Do the two equations have one solution, no solution, or infinitely many solution? Explain. Part C: How can you verify your

    asked by Jayson Angole
  167. Science

    Abiotic means non living Biotic means living The following list is to enter into a Venn Diagram where the circles are labeled Abiotic and biotic whale is biotic clock is abiotic water is abiotic fish is biotic paper is both glass is abiotic aluminum is

    asked by Jerald
  168. Finite

    The quantity demanded each month of Russo Espresso Makers is 250 when the unit price is $136. The quantity demanded each month is 1000 when the unit price is $106. The suppliers will market 750 espresso makers when the unit price is $72 or higher. At a

    asked by rich
  169. math

    which shape will create tessellation using only translations? A. scalene triangle B. regular hexagon C. equilateral triangle D. isosceles trapezoid

    asked by andrea
  170. math

    A lab needs a 20 liters of a 15% acid solution. The lab only has a 10% acid solution and a 30% acid solution. How much of the 10% acid solution will they need to mix with the 30% solution to obtain 20 liters of a 15% solution?

    asked by Anonymous
  171. math

    A box contains 4 red pencils, 3 blue pencils, and 3 yellow pencils. What is the probability that a student randomly selects a blue pencil, keeps it, then a second student randomly selects a yellow pencil? A. 1/10 B. 3/10 C. 6/10 D. 9/10

    asked by andrea
  172. math

    Which statement is true? A. All vertical lines have a slope of zero. B. All vertical lines have a slope positive slope. C. All vertical lines have a negative slope. D. All vertical lines have a undefined slope. WHY?

    asked by andrea
  173. chemistry

    the equilibrium constant for the synthesis of HBr(g0 from hydrogen and bromine gas is 2.18*10 exponent 6 at 730 degrees celcius.if 3.75 mol of HBr(g) is put into a 15L reaction vessel,calculate the concentration of H2,Br2 and HBr at equilibrium

    asked by tracy
  174. Earth science

    Waste produced by people along the East Coast of the United States 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 Michelle
  175. Earth science

    Earth’s troposphere, hydrosphere, and lithosphere contain relatively large amounts of which element?

    asked by Rihanna
  176. la

    shoud students who fail their classes be retained and have to repeat the grade ?

    asked by kate
  177. la

    shoud students who fail their classes be retained and have to repeat the grade ?

    asked by kate
  178. math

    What is the value of u in the following system of linear equations? 4u + 3v = –1 3u + 2v = 1 a) 5 b)-11/2 C)-7 d)19/3

    asked by joe
  179. math

    If Jo is supposed to read one-half of a 100-page book for an English assignment and she has finished 38 pages, what percent of the assignment does she have left to do? Please answer and explain.

    asked by Anonymous
  180. math

    What is the value of t in the solution to this systems of linear equations? 2s – 3t = –1 3s – 4t = 0 a)–5 b)3 c)-7/3 d)4

    asked by tom
  181. math

    Emily,Zeke,Harry,& Brook each conducted surveys on the number of books people have in their homes. Then they answered the question below. "MUST ALL MEASURES OF CENTRAL TENDENCY APPEAR AS A NUMBER IN A SET OF DATA COLLECTED? A. Emily says this is always

    asked by andrea
  182. STATs 353

    Find the 98% confidence interval for estimating ìd based on these paired data and assuming normality. (Give your answers correct to one decimal place.) Before 68,58,64,62,58,67 After 40,42,46,37,45,38 Lower limit: Upper limit:

    asked by Kim
  183. social studies

    How are the governments of Israel and Saudi Arabia different? How do you think this affects the daily lives of people who live in these countries? I don't know what to put What do they mean?

    asked by Jayce
  184. Find the domain, range and horizontal asymptote

    Find the domain, range and horizontal asymptote f(x)=2^-x-2

    asked by Alley
  185. math

    Students submitted pictures for the school yearbook. Only 4/5 of the submitted pictures fit in the yearbook. There were 105 pictures that did not fit. Approximately how many total pictures were submitted for the yearbook? A. 105 B. 210 C. 420 D. 500

    asked by andrea
  186. Algebra 1

    The student council is buying school T-shirts to sell during a fundraiser. The cost (y) of school T-shirts is a linear function of the number of T-shirts bought (x). The student council can buy 100 T-shirts for $825 and 300 T-shirts for $2,425. Write an

    asked by Amy
  187. math

    How do you find 60% of 20?

    asked by Anonymous
  188. Physics

    A constant torque of 22.9 N·m is applied to a grindstone whose moment of inertia is 0.168 kg·m2. Using energy principles, and neglecting friction, find the angular speed after the grindstone has made 17.1 rev, assuming it started from rest. Answer in

    asked by dallas
  189. Math

    Lou eats 6/8 of a pizza. What fraction of pizza is left over?

    asked by Anonymous
  190. math

    Max,Owen,Elise, and Cara went to a school carnival. They each played the dart throw,ring toss,water shoot,and basketball throw. Each student won a different game. CLUES:*Max didn't score any points at the dart throw. * Elise correctly tossed 2 rings, but

    asked by andrea
  191. math

    What is the value of t in the solution to this systems of linear equations? 2s – 3t = –1 3s – 4t = 0 a)–5 b)3 c)-7/3 d)4

    asked by tom
  192. math

    Between which two consecutive integers is the value of this irrational number? square root of 117? A. 8 and 9 B. 10 and 11 C. 14 and 15 D. 20 and 21

    asked by andrea
  193. social studies

    1.Israel is much smaller in land area than Saudi Arabia, but it is the center of more conflict over land ownership.Why do you think this is the case? Because most people live along the coastal plain in Israel and the eastern interior is dry and includes

    asked by Jayce
  194. Math HELP!!!

    The booster club sold tickets to a high school basketball game. They sold 700 student tickets and 500 general admission tickets, and raised a total of $5000. The combined cost of one student ticket and one general admission ticket was $8. The equations and

    asked by JSHJHDH
  195. Math

    1.During the last 5 shifts, Gary delivered 9,8,14,17, and 12 pizzas. What is the mean number of pizzas delivered during a shift? 12 2.Stephie's science experiment produced the following results:183,204,179,191,186.What is the range? 26 3.What is the mode

    asked by Jerald
  196. Algebra 1B

    A painter can use the formula A=2/3bh to estimate the Area of space under the parabola, where b is the length of the base and h is the height from the base to the vertex. Calculate the area, in square feet under each arch.

    asked by Frank J
  197. Math - Please Answer ASAP

    A 182 cm tall man is digging a hole in the ground. He stops for a moment and says: "I am done with one quarter of the hole. When I finish the job the top of my head is going to be three times as far under the ground as far it is above the ground now." How

    asked by Nikee
  198. chemistry

    The pH of a .10M HOBr solution is 4.8 1. What is [H+] in that solution? 2. What is [OBr-]? What is [HOBr]? (where do the H+ and OBr ions come from?) 3. what is the value of Ka for HOBr? what is the value for pKa?

    asked by Ray
  199. math

    What is the value of u in the following system of linear equations? 4u + 3v = –1 3u + 2v = 1 a) 5 b)-11/2 C)-7 d)19/3

    asked by tom
  200. MATH!!

    Andy, Barbara and Chrisy play a game. Their probabilities of winning are 1/2, 1/3, and 1/6 respectively. What is the probability that each wins exatly one of the first three games played? Express your answer as a common fraction.

    asked by shaun
  201. Math

    1A piece of fabric 3/10 of a meter long was but from a bolt that held 9/10 of a meter of fabric.How much fabric was left on the bolt? Express your answer in simplest terms 7/10 2Add.Simplify 5 3/16+2 7/16 7 5/8 3Subtract.Simplify 5-2 1/2 I don't know how

    asked by Jerald
  202. Domain of composite function

    Find the domain of the composite function fog. f(x)=x^2+3;g(x)=sqrtx-4

    asked by Alley
  203. General(dont know actual subject)

    My project is research based... I chose plastic surgery.... Question is: why have you chosen this task? ( in the box below write a paragraph explaining why you have selected your particualar task idea.) I really cant think of why i chose plastic surgery

    asked by Kaitlyn
  204. Math

    16.Four students are in line to perform in the talent show. Sally is ahead of Kevin. Marcus is behind Kevin. Sally is behind Jenny. Who is first in line Jenny

    asked by Jerald
  205. Math

    Coach Hank has two children. Her daughter is twice as old as her son. The sum of their ages is 15. How old is her son? 5

    asked by Jerald
  206. Math

    The basketball team scored 38,48,42, and 38 points in four games. What was the average points scored 41 Find the median of the data set 59 64 42 51 55 55 The noon temperature for last four days were 62 58 70 and 66. What was the range and mean range is 12

    asked by Jerald
  207. English comp

    I am trying to turn a poem into prose and I am totally lost. Can some help me if I send them the poem?

    asked by Rhonda
  208. chemistry

    If a 1.59 mole sample of argon occupies 3.07 L at constant temperature and pressure then what volume will 4.35 moles of argon occupy at the same conditions?

    asked by sarah
  209. Physics

    A spring with a spring constant of 35.0 N/m is attached to different masses, and the system is set in motion. What is the period for a mass of 34 g? Answer in units of s

    asked by alice
  210. math

    find mean median and mode of 10 1 10 15 1 7 10 10 1 6 13

    asked by joseph
  211. chem

    the volume of 0.220 mol of an ideal gas at 34°C is increased isothermally from an initial volume of 12.0 L. If the final volume is 21.5 L, calculate the entropy change for the process.

    asked by hannah
  212. math

    in her coin collection, holly has 1/3 more coins than jim has in his collection. if the number of coins in 1/2 of holly's collection is 10 more than the number of coins in 1/3 of jim's collection, how many coins does each have?

    asked by Anonymous
  213. Chemistry 111

    Write the conjugate acid for each of the following: a. HCO3^1- ____________________ b. H2O ____________________

    asked by Sean
  214. BIO

    If 10 DNA template molecules are used and 20 cycles of PCR, how many copies of a template would be amplified? I am pretty sure I cannot use 2^n (n equals the number of amplification cycles)because I don't have a single molecule of starting DNA template.

    asked by Lara
  215. Physics

    The electric field lines surrounding three charges are shown in the figure below. The center charge is q2 = -15.9 µC.

    asked by Zack
  216. Chemistry 111

    Write the conjugate base for each of the following: a. HPO4^-2 ____________________ b. H2O ____________________

    asked by Sean
  217. Physics

    A force of 2000N is used to push a box up am inclined plane that is 15m long. If the 100 kg box is raised to a height of 8m,how much work is done against friction ?let g=10m/s^2.

    asked by Riana
  218. Chemisty!

    How many milliliters of concentrated ammonia, 15 M NH3, would you dilute to 250 mL to produce 0.162 M NH3?

    asked by Alex
  219. Chemistry 111

    a) Write Bronsted acid-base equilibrium equations for the following: b) Show the acid-base conjugated species, labeling all species (1) HSO4- + C2O4-2 (2) HPO4-2 + NH4+

    asked by Sean
  220. Math

    Find the mode of the data set 48 52 29 38 29 36 42 29 Charlotte read five books with the following number of pages 185,212,146,165,and 197. What was the mean number of pages in the books 181 Enochs scores on seven tests were 85 68 91 75 82 79 and 93 What

    asked by Jerald
  221. Math

    Point A represents what fraction 0 1/8 2/8 3/8 4/8 A 6/8 7/8 1 5/8? Write a symbol > < or = to compare the fractions 3/4___17/20 < Add. Simplify 3 5/8+2 2/3 1 7/24

    asked by Jerald
  222. Math

    Paula invested into two accounts; one pays 5% simple interest and the other 6% simple interest. She invested $3000 more in the account paying 6% than in the other account 5%. At the the end of the first year, Paula total return was 730. How much did she

    asked by Sandra
  223. math

    Please help 1. 3 x (8 + 5) + 2 2. 9 x (8 / 4 x 5) By the way / means dividing

    asked by Anonymous
  224. Math 112

    Can you use the numbers 1 - 9, along with any math symbols and operations, to arrive at the answer of 100 when the 6 and 9 have a negative sign in front of them?

    asked by Vanessa Help please
  225. math

    in her coin collection, holly has 1/3 more coins than jim has in his collection. if the number of coins in 1/2 of holly's collection is 10 more than the number of coins in 1/3 of jim's collection, how many coins does each have?

    asked by chrissy
  226. chemistry

    How many milliliters of commercial hydrochloric acid, which is 11.6 M, should be used to prepare 6.94 L of 0.52 M HCl?

    asked by Alex
  227. fraction

    41/2+21/2

    asked by julieta
  228. Chemistry

    What is the effect of aqeour ammonia on (NH4)2SO4.FeSO4.6H2O?

    asked by Paul
  229. Math

    Paul baby sat for 4 1/5 hours on Friday and 2 1/4 hours on Saturday how many more hours did he baby sit on Friday 1 19/20

    asked by Jerald
  230. Public Speaking

    1. When your speech adds to your listeners’ knowledge, it is meant to: A. inform. B. persuade. C. entertain. D. celebrate. is it A 2. In choosing a topic for your first speech, it is wise to: A. ask advice from others. B. start with what you know. C.

    asked by Amy
  231. chemistry

    Calculate the new molarity when 150 mL of water is added to 125 mL of 8.55 M HBr.

    asked by Alex
  232. math

    find the ratio of the circumference 44ft to the diameter 14ft of a circle. write answer as a fraction in simplest form

    asked by Jasmine
  233. help making equations

    Superbats, Inc., manufactures two different quality of wood baseball bats, the Wallbanger and the Dingbat. The Wallbanger takes 8 hours to trim and turn on a lathe and 2 hours to finish it. It has a profit of $17. The Dingbat takes 5 hours to trim and turn

    asked by kim
  234. Public Speaking

    1. Effective public speaking is: A. audience-centered. B. message-centered. C. speaker-centered. D. channel-centered. is it A 2. When a speech attempts to influence the audience s beliefs, attitudes, and opinions about something, it is generally meant to:

    asked by Amy
  235. Philosophy

    True or false 1.Friedrich Schleiermacher argued that to understand the meaning of the Bible or any other text, it is necessary to consider the time and place of its author(s), and to ascertain the intention of the author(s) in producing the text. True

    asked by Christopher
  236. Pre calc

    Given the (x,y) coordinates of a point are (-1,-2) find 2 different (r, feta) coordinates? one with r > 0 and one with r< 0. a. Feta between zero and 2pie b. Feta between negative pie and pie c. Feta between 2pie and 4pie

    asked by Rebekah
  237. Math

    What is a attribute?

    asked by Grace
  238. Chemistry

    Urgent... Someone please help!! Can someone please check to see if I am doing these correctly, I have a test tomorrow... Thank you :) Q) Calculate the new molarity of a 35mL sample of 0.450 M CaCl2 solution that is diluted with enough water to make 250 mL

    asked by Kishwa
  239. physics

    7. No work is done by gravity on a bowling ball resting or moving on a bowling alley because the force of gravity on the ball acts perpendicular to the surface. But on an incline, the force of gravity has a vector component parallel to the alley. Discuss

    asked by Anonymous
  240. public Speaking

    1. Which of the following is a demographic characteristic of an audience? A. Size B. Lifestyle C. Gender D. Values is it C 2. When speaking about the awareness of breast cancer, the most important thing to consider when analyzing your audience is: A.

    asked by Amy
  241. Math

    The sunglasses that Ramon wants to buy are 50% off the original price of 85$ .How much did he have to pay?

    asked by Grace
  242. Vocabulary

    Researchers who study this have come up with some [convincing] exanples. In this sentence, the word convincing means: A) interesting B) persuasive C) expected D) humorous Check: B. persuasive

    asked by Celest
  243. Public speaking

    Attitudes, beliefs, values, and motivation are characteristics of: A. psychographics. B. demographics. C. the speaker’s profile. D. the audience’s response to the speech. is it B 2. Nicole was asked to speak to the French Club about her trip to

    asked by Amy
  244. hodges

    which has the largest radius K, Ca, K+ or Na?

    asked by reb
  245. Algebra

    A rock is dropped from a riverbank that is 4 feet above the surface of the river. After how many seconds does the rock hit the surface of the water? At highest?

    asked by Mary
  246. public speaking

    1. A speaker talking about the benefits of cosmetic surgery to an audience primarily of women is appealing to which level of needs in Maslow’s Hierarchy of Needs? A. Physiological needs B. Esteem needs C. Belongingness and love D. Safety needs.. is it B

    asked by Amy
  247. chemistry

    ch4(g)+nh3(g) translate into words help!

    asked by lolol
  248. Math

    One half of 9.76

    asked by Grace
  249. stats

    Question Part Points Submissions Used The number of ships to arrive at a harbor on any given day is a random variable represented by x. The probability distribution of x is as follows. (Give your answers correct to two decimal places.) x 10 11 12 13 14

    asked by kim
  250. Math

    What property is this? 4(7+9)=(4x7)+(4x9)

    asked by Grace
  251. Physics

    The earth's Field is Roughly equivalent to an axial centered dipole. Find the vertical rate of change of the vertical component of the earth's field in gammas/foot here at flagstaff. Given" vertical component of earth's magnetic field at flagstaff is equal

    asked by Jessica
  252. Math

    Need help on the question below. Which of the following questions is best suited for an experiment? a. what conditions do peppers need to grow? b. do peppers grow taller with 10ml of daily watering or with 15ml of daily watering c. what conditions do

    asked by Brandi
  253. Physics

    You are standing on a beach and 5 wave crests land on shore in 50 seconds. Each wave is 32m apart. Find Frequency, period, wavelength and speed.

    asked by Andrea
  254. math

    one gallon of paint will cover 200 squar feet of wall. the room has walls 7.5 feet high. what is the greatest lengh of wall that can be covered by one gallon of paint?

    asked by dylan lopez
  255. Physics

    Three forces act on an object at the same time. F1 = 10.0 N 50.0degrees north of east, F2 = 15.0 N 25.0degrees south of west, and F3 = 15.0 N 38.0degrees east of south. What is the magnitude and direction of the net force?

    asked by Rosa
  256. Math

    Need help with one more question. Which best describes a statistical question? a. a question that contains numbers b. a question about numbers c. a question about designing an experiment d. a question about a population or sample. I was thinking it might

    asked by Brandi
  257. Math

    A stock opened at 62 1/4 points and closed at 57 5/8 points. Find the change in the stock price 4 10/16

    asked by Jerald
  258. Physics

    Three forces act on an object at the same time. F1 = 100. N at 30.0degrees north of east, F2 = 200. N at 45.0degrees north of west, and F3 = 100. N at 30.0degrees east of south. What are the magnitudes and direction of both the resultant force and

    asked by Rosa
  259. English

    American Life, stereotypes? Just like television, commercial, etc. When we are watching TV, it gives us a "snapshot" of American life. If you look at the commercials alone, what would this tell you about how we live? I ask you to pretend that you are from

    asked by Erin
  260. math

    random sample of 9600 students. Multistage design effect similar to an SRS (for those still in school) 46% had at least one parent who was a college graduate. Estimate with 99% confidence the proportion of all students who had at least one parent who was a

    asked by Please Help
  261. math

    T and S share a digital music player that randomly selects songs to play. Together T and S have loaded 3476 songs. T and S want to know if each have loaded a different proportion of songs. When in random-selection mode, 22 of first 30 songs selected were

    asked by Nabil
  262. Math 1 question

    solve for c : 5c/6 + 1/2 = c/4 Please help, thanks :)

    asked by Olly
  263. math

    10cm^3 of a normal specimen of human blood contains 1.2g of hemoglobin. How many grams does 47cm^3 of the same blood contain?

    asked by pam
  264. government

    which of the following determines who holds the position of speaker of the house?

    asked by john
  265. Algebra 2

    4t^2-4/9(t+1)^2 * 3t+3/2t-2

    asked by Abbi
  266. math

    A long distance trucker traveled 300 miles in one direction during a snow strm. The return trip in rainy weather was accomplished at double the speed and took 5 hours less time. What was the speed going?

    asked by pam
  267. algebra 1

    The length of a rectangle is 4m more than the width. The area of the rectangle is 45 m squared. Find the length and width. Please help!

    asked by suzy
  268. government

    which of the following determines who holds the position of speaker of the house? a the president b the house c the senate d the joint houses of congress

    asked by john
  269. MATH

    Jack usually mows his lawn in 3 hours. Marilyn can mow the same yard in 5 hours. How long would it take them to mow the lawn together?

    asked by pam
  270. government

    congress shares power with the president in the field of foreign affairs. what other powers do congress and the president share? a judicial powers b postal powers c territorial powers d war powers

    asked by john
  271. Chemistry

    How much 1.0 M NaOH would be required to completely neutralize 40.0 mL of 0.60 M HCl?

    asked by Cary
  272. Chemistry

    4. A 5.309 g antacid tablet, with CaCO3 as the active ingredient, was mixed was 30.0 mL of 0.831 M HCl. It took 15.3 mL of 0.7034 M NaOH to neutralize the excess acid. a) Calculate the volume of HCl neutralized by the NaOH. b) Calculate the amount of HCl

    asked by Josh
  273. math

    sonya spent 2/5 of her money and then had $18 left. how much money did she originally have?

    asked by renee
  274. Chemistry

    1. If a student forms CaCO3 from the presence of carbon dioxide, but continued with the trial anyway, how would this affect his/her calculations (too high, too low, or no effect)? Explain your answers. a) The volume of NaOH required for the back titration.

    asked by Josh
  275. Chemistry

    Some antacid tablets actually contain a mixture of calcium carbonate and magnesium hydroxide (though they usually have the same “strength” as those that only contain CaCO3). If this had been the case for the antacid you tested, but you still assumed it

    asked by Jim
  276. Chemistry

    You have .8 liters of a 0.5M HCl solution. If you use this solution to complete a decomposition reaction of HCl how many moles of hydrogen (H2) would be produced?

    asked by John
  277. math

    you are looking for a safe place to put 30,000.00 for one yr. Bank A offers 2.46% interest rate continuously. Bank B offers 2.48% quarterly and Bank C offers 2.47% monthly. Find the most effective rate of each to determine which would earn you the most

    asked by Kat
  278. government

    what is the implied power expressed by the necessary and proper clause in the constitution a congress's ability to make laws is severely limited by the Constitution b congress is given limited authority to interpret reserved powers c congress must follow a

    asked by john
  279. Chemistry

    How do you calculate the standard enthalpy change for the reaction of an aqueous solution of barium hydroxide, Ba(OH)2, with an aqueous solution of ammonium nitrate, NH4NO3, at 25 degrees C? The complete ionic equation is: Ba2+(aq) + 2OH-(aq) + 2NH4+(aq) +

    asked by Lisa
  280. math

    Identify the initial value and growth or decay factor in each of the following exponential functions: a) y= 350 x 5^x b) Q= 25000 x (1/2)^t c) P=(7 x 10^3) x 4^t d) N= 5000 x (9/10)^t

    asked by kristy
  281. Math

    Triangle Lmn is similar to triangle xyz. Triangle LMN has a side of 5 and 3. The scale factor of triangle Lmn to triangle xyz is 2:5. What is triangle xyz's length? Helppppp Meeeeeeeeeee!!!

    asked by Bre
  282. math

    When at rest, two trains have sirens that emit a frequency of 300 Hz. The trains travel toward one another and toward an observer stationed between them. One of the trains moves at 30.0 m/s, and the observer hears a beat frequency of 3.6 beats per second.

    asked by lucy
  283. math

    the length of a photograph is 1 cm less than twice the width. the area is 28 cm squared. find the dimensions of the photograph.

    asked by sally
  284. precalculus

    Evaluate the following expressions. Your answer must be an angle in radians and in the interval [(-pi/2),(pi/2)] . (a) sin^(-1)(0) = (b) sin^(-1)((-sqrt3)/2) = (c) sin^(-1)(-1/2) =

    asked by Anonymous
  285. geometry

    Chris is making a painting with only triangles. He wants each side of the triangles to be the same length. What kind of triangle will he paint?

    asked by Ms.Vargas
  286. finite math

    What is the present value of an ordinary annuity which has payments of $1100 per year for 19 years at 5% compounded annually.

    asked by Debra
  287. math

    a) A linear function f(t)=b + mt has a slope of -4 and vertical intercept of 20. Find its equation. b) An exponential function g(t)=Ca^t has a decay factor of 1/4 and an initial value of 20. Find its equation. Plot both functions

    asked by Gabriella
  288. Chemistry 2

    A titration is performed by adding 0.124 M KOH to 40 mL of 0.159 M HNO3. a) Calculate the pH before addition of any KOH. b) Calculate the pH after the addition of 10.26, 25.65 and 50.29 mL of the base.(Show your work in detail for one of the volumes.) c)

    asked by Antonio
  289. math

    Subjects were asked to taste two wine samples in sequence. Both samples given were the same wine although subjects were expecting to taste two different samples. Of the 32 subjects in the study, 22 selected the wine presented first when presented with two

    asked by sushmitha
  290. math

    Jeremiah made a pitcher of iced tea. Which is most likely the capacity of the pitcher?

    asked by Ms.Vargas
  291. English/writinh

    Im having a hard time starting my introduction for my essay. I already wrote my thesis statement which is: " In Nathaniel Hawthorne’s, The Scarlet Letter, it suggests that one must find their own internal strength and strive for individual redemption by

    asked by Sarah
  292. cal

    a rancher has 4000 feet of fencing for constructing a rectangular corral. one side of the corral will be formed by a barn and requires no fence. three exterior fences and 2 interior fences partition the corral into 3 rectangular regions. what dimension of

    asked by Lufy
  293. Science

    How many grams of CaCl2 are required to prepare 2.00 liters of 7.00 M CaCl2?

    asked by Destiny
  294. math

    find the solution of the following system of equations x-y=0 x+y=4

    asked by adriana
  295. math

    George painted his room yesterday. he use 1/8 of the paint in can in the morning and 5/8 of the paint in the afternoon.his much of the did he use?

    asked by reyna German
  296. math

    George painted his room yesterday. he use 1/8 of the paint in can in the morning and 5/8 of the paint in the afternoon.his much of the did he use?

    asked by reyna German
  297. math 141

    Three machines turn out all the products in a factory, with the first machine producing 40% of the products, the second machine 35%, and the third machine 25%. The first machine produces defective products 12% of the time, the second machine 3% of the time

    asked by Tim
  298. Physics 2

    Light with λ = 530 nm passes through a single slit and then illuminates a screen 9.0 m away. If the distance on the screen from the first dark fringe to the center of the interference pattern is 3.20 mm, what is the width of the slit?

    asked by Madison
  299. physics

    c). at what speed does it hit the ground? d). what total length of time is the ball in the air

    asked by sue
  300. science

    if a ball that has a density of 1.17 g cm3 placed in the beaker, where will the ball come to rest

    asked by diana
  301. chemistry

    At 10°C below the melting point of aluminum, 0.08% of the atom sites are vacant. At 484°C only 0.01% are vacant. Given this information, determine the energy of vacancy formation (ΔHv) for aluminum. Energy of vacancy formation (in joules / vacancy):

    asked by adex
  302. chemistry

    Determine the radius of the largest atom that can be accommodated in the interstices of BCC iron (Fe) without stress. (Hint: the center of the largest site is at ½, ¼, 0; draw a unit cell - it helps.) Radius (in centimeters):

    asked by adex
  303. chemistry

    An activationenergy of 2.0 eV is required to form a vacancy in a metal. At 800°C there is one vacancy for every 10-4 atoms. At what temperature will there be one vacancy for every 1000 atoms? Temperature (in degrees Kelvin): unanswered

    asked by adex
  304. Math

    I need to verify this equation and I get stuck after trying everything I can think of. Help! cos(4x)=4[sin(x)cos(x)-sin^3(x)cos(x)]

    asked by Matt
  305. college physics

    a tennis ball is thrown straight up with an initial velocity of 22.5 m/s. it is caught at the same distance above the ground. a). how long does it take to reach its maximum height? b). how high does the ball rise? c). at what speed does it hit the ground?

    asked by confused
  306. science

    can you simply explain what happens to ice that breaks off a glacier that lands in the water

    asked by kathy