Questions Asked on
April 1, 2013

  1. Chemistry

    Write a chemical equation representing the second ionization energy for lithium. use e- as the symbol for an electron.

    asked by anonymous
  2. calculus

    Consider a window the shape of which is a rectangle of height h surmounted by a triangle having a height T that is 1.1 times the width w of the rectangle If the cross-sectional area is A, determine the dimensions of the window which minimize the perimeter.

    asked by sam
  3. Physics-friction problem

    A 0.170 kg hockey puck is initially moving at 21.2 m/s [W] along the ice. The coefficient of kinetic friction for the puck and the ice is 0.005. (a) What is the speed of the puck after traveling 58.5 m? my solution: Fnet=Fk ma=μk.Fn ma=μk.mg

    asked by LG
  4. Chemistry

    Calculate the standard free-energy change for the following reaction at 25 C degrees. 2Au^3+(aq)+3Ni(s) 2Au(s)+3Ni^2+(aq) Ni2+(aq) + 2e- -> Ni(s) E=-0.26 Au3+(aq) + 3e- -> Au(s) E=+1.498 G= ? KJ Would it be G=1.758? •Chemistry - DrBob222, Sunday, March

    asked by Anon
  5. Chemistry

    Use Coulomb's Law to calculate the energy of a copper ion and an oxide ion at their equilibrium ion-pair separation distance. Cu^2+ radius(pm)= 77 O^-2 radius (pm)=140 answer in aJ

    asked by anonymous
  6. Chemistry

    For a particular redox reaction NO2– is oxidized to NO3– and Cu2 is reduced to Cu . Complete and balance the equation for this reaction in basic solution. Phases are optional.

    asked by Connor
  7. chemistry

    Use the molar volume to find the volume, in liters, of 6.40g of O2 at STP.

    asked by kate
  8. math

    One ordering of the letters T, U, V and Wfrom left to rightis UTVW. What is the total number of orderings of these letters from left to right, including UTVW?

    asked by naomie
  9. Chemistry

    Here are the effective nuclear charges, Zeff, for the valence electrons of four different atoms. 1.30, 1.95, 2.60, 3.25 In order, these values could belong to what list of elements? Sr, Ca, Mg, Be Be, Mg, Ca, Sr C, B, Be, Li (or) Li, Be, B, C Here are the

    asked by marie darling
  10. Chemistry

    H2C2O4.2H2O(s) is primary standard substance. 2.3688g of oxalic acid hydrate were completely neutralized by 42.56ml of NaOH solution. Calculate the molar concentration of the NaOH solution. Write the balanced equation for the reaction.

    asked by Sean
  11. Pre-Algebra

    How many different ways can you choose 3 frozen yogurt toppings from 20? 6,840 1,140 60* 2,260 I think it is 60 because 3*20 however not positive.

    asked by Kate
  12. Chemistry

    If 3.21 mol of a gas occupies 56.2 L at 44*C and 793 torr, 5.29 mol of this gas occupies __________ L under these conditions. . -How will I solve this using PV= nRT? I tried using PV= nRT. By just plugging in the value and got 131 but the answer is around

    asked by Shadow
  13. Physics

    A combination lock has a 1.2 cm -diameter knob that is part of the dial you turn to unlock the lock. To turn that knob, you grip it between your thumb and forefinger with a force of 0.62 N as you twist your wrist. Suppose the coefficient of static friction

    asked by Leanna
  14. Urgent Chemistry Problem!!

    Calculate Delta G at 298 K for the following reactions. Ca(s) + CO2(g) + 1/2O2(g) -> CaCO3(s) 2KClO3(g) -> 2KCl(s) + 3O2(g) CH4(g) + 3Cl2(g) -> CHCl3(g) + 3HCl(g) Delta G^0f CHCl3 is - 70.4 kJ/mol The following reactions are important ones in catalytic

    asked by Amy
  15. Math

    A theater group made appearances in two cities. The hotel charge before tax in the second city was $1000 higher than in the first. The tax in the first city was 4% , and the tax in the second city was 7% . The total hotel tax paid for the two cities was

    asked by jess
  16. math

    The total fencing around a square field is 80 yards. The field has an area of how many square yards?

    asked by mary
  17. BIOSTATISTICS PLEASE HELP

    exercise: The average number of sick days an employee takes per year is believed to be about 10. Members of a personnel department do not believe this figure. They randomly survey 8 employees. The number of sick days they took for the past year are as

    asked by yao
  18. Chemistry

    A galvanic (voltaic) cell consists of an electrode composed of magnesium in a 1.0 M magnesium ion solution and another electrode composed of copper in a 1.0 M copper(I) ion solution, connected by a salt bridge. Calculate the standard potential for this

    asked by Anon
  19. 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
  20. Chenmistry

    Fe2O3 + 3C = 2Fe + 3CO How many grams of C are required to react with 2.50 moles of Fe2O3 ?

    asked by Marcie
  21. Math

    190 students like the program 135 students think the program is unnecessary 220 students plan on running for student government next year. If a circle graph were made from this data, what would the measure of the central angle be for the group that likes

    asked by Katie
  22. algebra

    Which property would allow you to use mental computation to simplify the problem 27 + 15 + 3 + 5?

    asked by Candice
  23. Math

    Pythagorean Theorem A rectanglar box is 9 in. wide, 11 in. tall, and 20 in. long. What is the diameter of the smallest circular opening through which the box will fit? If necessary, round to the nearest tenth of a centimeter.

    asked by Jane
  24. Physics

    Question 2. 3 Consider a box that explodes into two pieces while moving with Fig. 9-24 a constant positive velocity along an x axis. If one piece, with mass : m1, ends up with positive velocity v1, then the second piece, with : mass m2, could end up with

    asked by Michelle
  25. Chemistry

    How do you differentiate between fluorene and acetanilide? Suggest procedures and steps involved other than melting point and chromatography.

    asked by Albert
  26. trig

    An airplane pilot wishes to maintain a true course in the direction 250° with a ground speed of 400 mi/hr when the wind is blowing directly north at 60 mi/hr. Approximate the required airspeed and compass heading

    asked by Caroline
  27. Chemistry

    I am so overwhelmed. can somebody please help me? Consider a solution that is 0.022 M in Fe^2+ and 0.014 in Mg^2+ A) if K2CO3 is to selectively precipitate one of the cations while leaving the other cation in solution, which cation will precipitate first?

    asked by Jennifer
  28. Physics 1

    A coin rests 12.0 cm from the center of a turntable. The coefficient of static friction between the coin and turntable surface is 0.350. The turntable starts from rest at t = 0 and rotates with a constant angular acceleration of 0.749 rad/s2. After what

    asked by Emily
  29. physics

    A test charge of +3.00 10-6 C experiences a downward electrostatic force of 15 N when placed at a certain point in space. What are the magnitude and direction of the electric field at this point?

    asked by Amy
  30. Chemsitry

    For a particular redox reaction NO2– is oxidized to NO3– and Cu2 is reduced to Cu . Complete and balance the equation for this reaction in basic solution. Phases are optional.

    asked by Connor
  31. civil engineering

    A stone (on the edge of the roof) thrown from the top of a building is given an initial velocity of 20.0 m/s straight upward. The building is 50.0 m high, as shown in Fig. 4. Using tA = 0 as the time the stone leaves the thrower’s hand at position ○A .

    asked by hamze
  32. physics

    a climber with a weight of 590 N is held by a belay rope connected to her climbing harness and belay device; the force of the rope on her has a line of action through her center of mass. The indicated angles are θ = 35˚ and φ = 35˚. If her feet are on

    asked by ANS
  33. Personal Finance

    Janice Jacobs is planning for her retirement. She knows what assets and liabilities she has now and expects to have in the future. She knows what her spending patterns are likely to be and adjusted them for inflation. She also has identified all of her

    asked by bree
  34. chemistry

    how many moles of aluminum are needed to react completly with 1.2 mol of FeO 2Al(s)+3FeO(s)=3Fe(s)+ Al2O3(s)

    asked by carlos
  35. Math algebra

    A motel clerk counts his $1 and $10 bills at the end of a day. He finds that he has atotal of 56 bills having acombined monetary value of $191. Find the number of bills of each denomination that he has

    asked by Evelyn
  36. Physics

    A parachutist relies on air resistance (mainly on her parachute) to decrease her downward velocity. She and her parachute have a mass of 55.5kg and air resistance exerts a total upward force of 620N on her and her parachute. What is the combined weight of

    asked by Ben
  37. chemistry

    How many electrons in an atom could have these sets of quantum numbers? n=3 n=5, l=2 n=6, l=1 ml=-1

    asked by anonymous
  38. Math Statistics

    The annual per capita consumption of fresh apples (in pounds) in a nearby state can be approximated by a normal distribution, with a mean of 15.9 pounds and a standard deviation of 4.2 pounds. (a) What is the smallest annual per capita consumption of

    asked by Ann
  39. Chemisty

    Calculate the standard enthalpy change for the following reaction at 25 °C. MgCl2(s)+H2O(l)-->MgO(s)+2HCl

    asked by Orton
  40. Physics

    Suppose that the resistance between the walls of a biological cell is 4.9 × 10^9 ohms (a) What is the current when the potential difference between the walls is 68 mV? (b) If the current is composed of Na+ ions (q = +e), how many such ions flow in 0.45 s?

    asked by Drue
  41. Introductory Chemistry

    A sample of 0.255 mole of gas has a volume of 748 mL at 28C. Calculate the pressure of this gas.

    asked by Toni
  42. Physics

    The drawing shows a sulfur dioxide molecule. It consists of two oxygen atoms and a sulfur atom. A sulfur atom is twice as massive as an oxygen atom. Using this information and the data provided in the drawing, find (a) the x coordinate and (b) the y

    asked by Dee
  43. AP CHEMISTRY

    The molar mass of an unknown organic liquid (M~100) is determined by placing 5 mL of the liquid in a weighed 125-mL conical flask fitted with a piece of Al foil with a pin hole in it. The flask is heated in a boiling water bath until the liquid evaporates

    asked by Someone
  44. Physics

    When a charged particle moves at an angle of 12° with respect to a magnetic field, it experiences a magnetic force of magnitude F. At what angle (less than 90°) with respect to this field will this particle, moving at the same speed, experience a

    asked by Anonymous
  45. chemistry

    How to calculate the molarity of commercial bleach

    asked by Brooke
  46. Physics

    A test rocket is fired up from rest. The net acceleration is 20m/s^2 upward and continues for 4.0 seconds, at which time the rocket engines cease firing. What maximum elevation does the rocket reach?

    asked by Kim
  47. NOVACC

    A circular loop of wire (radius = 6.0 cm, resistance = 40 miliamps) is placed in a uniform magnetic field that makes and angle of 30 degrees with the plane of the loop. The magnitude of the field changes with time according to B = 30 sin (20t)mT, where t

    asked by J
  48. Combinations

    Anna was opening a new restaurant, so she went to the sign store to get letters to make a sign to hang above the storefront. When she got to the sign store, the only letters they had in stock were two copies of the letter 'X,' two copies of the letter 'E,'

    asked by Anna
  49. math: Algebra

    Three cylindrical tubes with with a 12 in diameter are strapped together by a plastic band. How long is the band?Suppose that four of the same tubes are strapped together with a snugly fitting plastic band how long is the band?

    asked by John
  50. chemistry

    a 23.74 ml volume of .0981 M NaOH was used to titrate 25 mL of a weak monoprotic acid solution to the stoichiometric point. determine the molar concentration of the weak acid solution. Express your answer to the correct number of significant figures.

    asked by Joann
  51. Math

    Tonya took out a loan to help pay for her house. She borrowed $50,000 for 15 years at a yearly simple interest rate of 5%. How much interest will she end up paying the bank?

    asked by Sanya
  52. Physics

    Suppose you wish to make a vertical leap with the goal of getting your head as high as possible above the ground. At the top of your leap, your arms should be... a. held at your sides. b. raised above your head. c. outstretched, away from your body.

    asked by Leanna
  53. Math

    Please help! 1. A taxi cost $2.25 for the first mile plus .15 for each additional tenth of a mile. For a 5.2 mile trip Eric paid $10 and told the driver to keep the change. How much was the drivers tip? 2. 2 trillion is how much more than seven hundred

    asked by Erin
  54. dynamics

    a motorcycle traffic police starts from rest at point A two seconds after a car speeding at the constant rate of 120 km/h passes point A (where speed limit is 100 km/h only) if the policeman accelerates at the rate of 6 m/s^2 until he reaches the speed of

    asked by mahdi
  55. Physics

    A large spool in an electrician's workshop has 52 m of insulation-coated wire coiled around it. When the electrician connects a battery to the ends of the spooled wire, the resulting current is 2.3 A. Some weeks later, after cutting off various lengths of

    asked by Drue
  56. US History

    Which of the following required land to be paid for in gold or silver, instead of paper money?

    asked by Anonymous
  57. chemistry

    A 23.4 mL sample of 0.300 M trimethylamine, (CH3)3N, is titrated with 0.399 M perchloric acid. After adding 6.67 mL of perchloric acid, the pH is

    asked by Sean
  58. Economics

    The price of cranberry juice suddenly increases. As a result, Glenda begins drinking more grape juice, which is less expensive, but tastes just as good to her. In this case, Glenda’s elastic demand is due to A. availability of substitutes. B. relative

    asked by bree
  59. Physics

    A 45-m length of wire is stretched horizontally between two vertical posts. The wire carries a current of 67 A and experiences a magnetic force of 0.15 N. Find the magnitude of the earth's magnetic field at the location of the wire, assuming the field

    asked by Anonymous
  60. math

    Susan Borrowed $5000. The term of the loan is 12% compouned monthly for 3 years. what is the monthly payments? How much must she pay at the end of of 1 year to pay the balance off? How much did she save in interest by paying the loan off in one year??

    asked by Rose
  61. Math

    If you deposit P dollars into a bank account paying an annual interest rate r, with n interest payments each year, the amount A you would have after t years is A=P(1+r/n)^nt. Kevin places $100 in a savings account earning 6% annual interest, compound

    asked by Amber
  62. Statistics Math

    The annual per capita consumption of fresh apples (in pounds) in a nearby state can be approximated by a normal distribution, with a mean of 15.4 pounds and a standard deviation of 3.8 pounds. (a) What is the smallest annual per capita consumption of

    asked by TJ
  63. Algebraic

    Joan Arlington has twice as much money invested at 5% simple annual interest as she does at 4%. If her yearly income does she have at each rate? At 4%, she has At 5%, she has

    asked by Evelyn
  64. 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
  65. physics

    Julie throws a rock vertically upward. From a height of 64.0 meters above thehow ground. The initial velocity of the rock is 31.0 meters per second neglect air resistance How long does it take for the rock to hit the ground? What is the velocity of the

    asked by kieshà
  66. Physics

    There are approximately 110 million TVs in the United States. Each uses, on average, 80 W of power and is turned on for 5.9 hours a day. If electrical energy costs 0.11 dollars per kWh, how much money is spent every day in keeping the TVs turned on?

    asked by Drue
  67. Finance

    . Suppose the December CBOT Treasury bond futures contract has a quoted price of 80-07. If annual interest rates go up by 1.00 percentage point, what is the gain or loss on the futures contract? (Assume a $1,000 par value, and round to the nearest whole

    asked by KBrown
  68. Physics

    A stone is thrown from the edge of a cliff into the ocean below. It is thrown somewhat upward, but mostly outward. The stone has a mass of 2.0kg and is thrown with a speed of 10m/s from an initial height of 5.0m above the ocean. A. What is the kinetic

    asked by Jay
  69. physics

    A charge of 12 ìC, traveling with a speed of 9.0 x 106 m/s in a direction perpendicular to a magnetic field, experiences a magnetic force of 8.7 x 10-3 N. What is the magnitude of the field?

    asked by adrienne
  70. Physics

    A jogger starting morning run accelerates from a stand still to their jogging pace of 8km/hr. They reach a speed of 8km/hr 5 seconds after starting. How long does it take the jogger to reach the end of their 20m driveway?

    asked by Parshu Ram
  71. S S T

    THE LONGEST RIVER IN INDIA IS?

    asked by NISHI
  72. algebra 1 part 2

    What are the minimum, first quartile, median, third quartile, and maximum of the data set? As cars passed a checkpoint, the following speeds were clocked and recorded. Speed (mph): 55 62 61 54 68 72 59 61 70

    asked by melinda
  73. Chemistry

    Na2SO4 solution is slowly added to a solution which contains .10 M Ba (2+) and .1 M Pb(2+). which of the following statements descrives the result of the addition of Na2SO4

    asked by Joe
  74. Chemistry

    Explain clearly which out of the following combinations of solutes would result in the formation of a buffer solution? A) NH3 and HCl in a 2:1 molar ratio B) HCl and NaOH in a 1:2 molar ratio C) NH3 and NH4Cl in a 2:1 molar ratio D) NaOH and CH3COOH in a

    asked by Jill
  75. CHM 1010

    Under pressure of 862kPa, a gas has a volume of 752ml. The pressure is increased, without changing the temperature, until the volume is 624ml. What is the new pressure

    asked by Jocelyn
  76. physics

    In a solar water heater, energy from the Sun is gathered by water that circulates through tubes in a rooftop collector. The solar radiation enters the collector through a transparent cover and warms the water in the tubes; this water is pumped into a

    asked by Ashley
  77. Chemistry

    A ground state hydrogen atom absorbs a photon of light having a wavelength of 93.77 nm. It then gives off a photon having a wavelength of 2630 nm. What is the final state of the hydrogen atom?

    asked by marie darling
  78. 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
  79. Physics

    The fundamental frequency of the G string of a guitar is f=196Hz. The fundamental vibrational mode of the string is described by the standing wavey(t,x)=acos(2πft)sin(πxL)where L=65cm is the length of the string and a=1mm is the amplitude of the

    asked by stranger
  80. LEATURE

    In The Call of the Wild, what valiant, tragic figure among the dogs must finally be put down for the good of the lives of the team? A. Pike B. Spitz C. Dub D. Sol-leks

    asked by Anonymous
  81. Math/ Calculus Please HELP!!!

    The following table gives the velocity v(t) (in feet per sec) at different instances of time t (in sec) of a particle moving along a horizontal axis. t 0 4 8 12 16 20 v(t) 43 42 40 35 25 5 Estimate the distance traveled by the particle between t = 0 sec

    asked by Marto
  82. Physics

    A stone is thrown from the edge of a cliff into the ocean below. It is thrown somewhat upward, but mostly outward. The stone has a mass of 2.0kg and is thrown with a speed of 10m/s from an initial height of 5.0m above the ocean. A. What is the kinetic

    asked by Jay
  83. math

    The ratio of dimes to nickels is 2/3. He has $.75 innickels. How many dimes does he have?

    asked by bella
  84. Economics

    The price of cranberry juice suddenly increases. As a result, Glenda begins drinking more grape juice, which is less expensive, but tastes just as good to her. In this case, Glenda’s elastic demand is due to i think is a but im not sure

    asked by bree
  85. chemistry

    determine how many grams of N2 are produced by 9.12 g of H2O2 and 6.90 g of N2H4. 2H2O2+N2H4= 4H2O+N2

    asked by lee
  86. physics

    A light beam containing red and violet wavelengths is incident on a slab of quartz at an angle of incidence of 50.0°. The index of refraction of quartz is 1.455 at 660 nm (red light), and its index of refraction is 1.468 at 410 nm (violet light). Find the

    asked by Lara
  87. physics

    What mass (in grams) of steam at 100°C must be mixed with 446 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 65.0°C? The specific heat of water is 4186 J/kg·K. The latent heat of fusion is 333 kJ/kg, and

    asked by safc
  88. Math

    Sorry but how do you convert 24.375 into a fraction?

    asked by Anonymous
  89. pre calculus

    If you are driving down a 10% grade, you will always be 10% below where you would have been if you could have driven on flat ground from where you started. Suppose you descend to where you are 20 feet below your starting point. What concept does the

    asked by sharon
  90. math help

    suppose that the functions p and q are defined as p(x)=x^2+3 q(x)= squarex+2 (q*p)(2)= (p*q)(2)=

    asked by sw
  91. Physics

    Multiple-Concept Example 9 reviews the concepts that are important to this problem. A light bulb is wired in series with a 116-Ω resistor, and they are connected across a 120.0-V source. The power delivered to the light bulb is 20.7 W. What is the

    asked by Drue
  92. math

    two equal sides of an isoscles triangle with fixed based 'a' are decreasing at the rate of 9cm/second how fast is the area of triangle decreasing when the two sides are equal to 'a'

    asked by shweta
  93. math

    a boy is walking at dusk and notices his shado from a nearby street light. the boy is 5 feet tall and the street light is 12 feet above the ground. When the boy is 4 feet from the base of the street light how long will his shadow be?

    asked by Ro
  94. 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 ANS
  95. Gen English

    Ok im still confused in the poem dreams by langston hughes describe how the poem is structured, or arranged in lines and stanzas.

    asked by Shay
  96. math

    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
  97. chem

    how many calories of heat energy are required to warm 250ml of water from 35 degrees celsius to 64 degrees celsius?

    asked by Denise
  98. physics

    If the specific heat of water = 4190 J/kg /°C and a total of 120g of hot water at 95°C is poured into the calorimeter, resulting in a final equilibrium temperature of 73°C, how many joules of heat are lost by the water? 11061.6 If the specific heat of

    asked by Shay
  99. Chem

    What will be the temperature of a 3.5 gram sample of carbon dioxide gas in a 2.5 liter container at .955 atm

    asked by Ben
  100. physics

    The average rate at which energy is conducted outward through the ground surface in a certain region is 66.8 mW/m2, and the average thermal conductivity of the near-surface rocks is 2.13 W/m·K. Assuming a surface temperature of 8.01°C, find the

    asked by Ashley
  101. Maths

    During the month of January, temperatures can decrease by 18° per week. If this happens, and the temperature on January 12th was 9°, what is the temperature on January 19th?

    asked by Sanya
  102. Gen English

    In the poem Dreams by Langston Hughes, Describe how the poem is structerd,or arranged in lines and stannnzas.

    asked by Shay
  103. Chemistry

    Can someone please check to see if I am doing this correctly. 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 of solution. A) 0.450 m CaCl2 x 35mL/250mL = 0.063 mL

    asked by Kishwa
  104. Math 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
  105. math help

    The one-to-one functions and are defined as follows. g={(-3,6),(-2,4),(3,7),(6,-9)} h(x)=2x-9 find the following g^-1(6)= h^-1(x)= (h^-1 oh)(1)=

    asked by sw
  106. Physics

    How much work is done by the horizontal force F = 150 N on the 18 Kg block when the force pushes the block 5.0 M up along the 32 degree friction-less incline?

    asked by Anyi
  107. science

    What are 4 examples of physical systems designed by people?

    asked by kole
  108. Algebraic

    Salem and Vernon ville are 168 miles apart. A car leaves Salem traveling towards Vernonville, and another car leaves Vernonville at the same time, traveling towards Salem. The car leaving Salem averages 10 miles per hour more than the other and they meet

    asked by Evelyn
  109. health

    Why are fad diets considered unhealthy?

    asked by melissa
  110. Physics

    Two objects with masses 4.90 and 2.10 hang 0.800 above the floor from the ends of a cord 7.20 long passing over a frictionless pulley. Both objects start from rest. Find the maximum height reached by the 2.10 object. The heavier object will move .8 m down,

    asked by Ben
  111. maths

    The probability that Katarina will correctly solve a given Brilliant math problem is 1/8. The probability that Layla will solve the same problem correctly is 1/12. The probability that they will give the same incorrect numerical result is 1/1001. Suppose

    asked by rohit
  112. Algebra

    Find the 1st four hexagonal numbers and the formula The difference of two squares a2 - b 2 can be found in 16sq2 – 13sq2 = 3(16 + 13) = 3 . 29 = 87

    asked by Ernie
  113. Chemistry

    How many moles of H2O are produced when 6 moles of o2 is consumed in burning meyhyl Alchohol

    asked by George
  114. Math

    There are about 5 ml in one teaspoon. There are 3 teaspoons in one tablespoon. How many ml are there in 10 tablespoon?

    asked by TJ
  115. chemistry

    The heat of solution of potassium acetate in water is -15.3 ,What will be the final temperature when 0.132 is dissolved in 550 water that is initially at 25.1 ?

    asked by Anonymous
  116. math

    what is the slope of the graph? what does it mean in the context of the problem? the slope for the problem is 2 i don't understand the second question then it says what is the y-intercept and what does the y-intersept represent. for the problem the

    asked by lily
  117. MATHS

    A SUM OF MONEY IS KEPT IN A BANK AT 8% INTEREST COMPOUNDED ANNUALLY.HAD THE INTEREST BEEN AT 10% COMPOUNDED SEMI ANNUALLY THE AMOUNT AFTER 1 YEAR WOULD HAVE BEEN 225 MORE.WHAT WAS THE PRINCIPAL AMOUNT KEPT IN THE BANK?

    asked by NISHI
  118. math

    This is a matrix question. R is the matrix (3r 1) (s 2s) 1. State, in terms of s and r the determinant of R 2. If r=1/3 and s=4 determine the inverse of R 3.State the pair of r and s not including 0, which would make the matrix R a singular matrix

    asked by lindsay
  119. algebra

    Solve with fractions. 6x^(2/3)-11x^(1/3)+4=0 How do I solve? Thanks

    asked by Anonymous
  120. Maths

    For a Chinese New Year celebration, James and Zhou are making a dragon costume similar to the one shown above. In total, the costume requires 58.6 meters of fabric. Zhou already has 11.5 meters of fabric, and James just purchased 20.2 meters of fabric. How

    asked by Sanya
  121. Math

    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 Chris
  122. Science Physics

    An object weighs 12 N on earth. When it is brought to Mars, it has a weight of 4.8 N. What is the acceleration due to gravity on Mars? (Taking the acceleration due to gravity on earth is 10 m/s²)

    asked by Sarah
  123. Math

    1. Number sense. Could the frozen yogurt survey help restaurants choose flavors of frozen yogurt? Explain. 2. Give an example of a topic for a survey question where the results for the answers could be similar.

    asked by Mike
  124. algebra

    Consider making a four-digit I.D. number using the digits 3,5,8, and 0 a. How many I.D. numbers can be formed using each digit once? b. How many can be formed using each digit once and not using 0 first? c. How many can be formed if repetition is allowed

    asked by Karina
  125. math

    what is the slope of the graph? what does it mean in the context of the problem? the slope for the problem is 2 i don't understand the second question then it says what is the y-intercept and what does the y-intersept represent. for the problem the

    asked by lily
  126. physics

    A battery with an emf of 14.5 V and internal resistance of 0.83 Ω is connected across a load resistor R. If the current in the circuit is 0.81 A, what is the value of R?

    asked by Ray
  127. maths

    Find the largest possible value of x^3+y^3+z^3 for realx, y, z, such that xyz^2=−64y−128x x^2yz=−32y−32z 3xy^2z=128x−64z

    asked by stranger
  128. Math

    The gravitational acceleration, g, on the Earth is proportional to the mass, M, of the Earth and inversely proportional to the square of the distance, r, from the Earth's center. If the gravitational acceleration on the center of the Earth is 9.8 m/s^2,

    asked by Lorie
  129. PHYSICS

    1kg of fat is equal to 30MJ of energy.the efficiceny of converting fat to energy is 20%. suppose you life a mass of 12kg 2.0m vertically,500 times, how much work do you do? if all the energy used to do the work comes from the burning fat how much fat is

    asked by Riana
  130. Science ASAP

    1. Angiosperms have organs such as ______________ and produce seeds. The are described as _________________plants. (1 point) flowers; vascular stems; pollinated rhizoids; vascular leaves; non-vascular 4. Of the following, which is NOT a characteristic of

    asked by Delilah
  131. chemistry

    You wish to make n-type silicon. Select all suitable dopant atoms from the following list:P, B, Mg, Ga, As, In, Sb, Al, Tl, H

    asked by adex
  132. MATHS

    IF ONE OF THE INTERIOR ANGLES OF A REGULAR POLYGON IS TO BE EQUAL TO (9/8) TIMES OF ONE OF THE INTERIOR ANGLES OF A REGULAR HEXAGON,THEN THE INTERIOR SIDES OF THE POLYGONS IS .......?

    asked by NISHI
  133. math

    What is the angle relationship notes for the test i have to take? please help me someone thanks for the help you guys... oh yeah almost forgot this some 7th grade math..

    asked by lola
  134. Chemistry

    Can someone please tell me if I am doing this problem correctly. Thank you! Given: 450 mL (0.450L); 0.250 M KNO Need: Mass of KNO Q) What mass of KNO3 (MW=101) is needed to prepare 450mL of 0.250 M KNO3 in water? A) 0.450 L Solution x 0.250 M KNO/1 L

    asked by Kishwa
  135. English

    1. What is bibimbap? It is a popular Korean dish. 2. What do we have today? We have a special dessert today. 3. What is today's special dessert? It's chocolate ice cream. 4. Who are they? They are student reporters. 5. What is the opening hours of the

    asked by rfvv
  136. Chemistry

    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 of solution. A) M1V1 = M2V2 M1 = 0.450 M2 = ? V1 = 0.035 L V2 = 0.250 L M2 = M1 X V1/V2 0.450 X (0.035L/0.250L) = 0.063 Did I set this

    asked by Kishwa
  137. English

    1. When is the library open? It is open from 8 a.m. to 5 p.m. 2. What time is the library open? It is open from 8 a.m. to 5 p.m. 3. What are the opening hours of the library? The opening hours are from 8 a.m. to 5 p.m. 4. What are opening hours of the

    asked by rfvv
  138. English

    7.Me definition of a(n) (optimist misapprehension) is someone who looks at an almost empty bottle and says, "This bottle is one quarter full." optimist 8.The worst way to deal with disappointments is to become (fluent sulky) the best way is to smile and

    asked by Jerald
  139. algebra

    A fair six-sided die is rolled. If the number showing is even, you lose a point for each dot showing. If the number showing is odd, you win a point for each dot showing. a. Find E(x)for one roll if x represents the number of point s you win. b. Find the

    asked by Karina
  140. science need help

    2 H2 + O2 = 2H2O 2 grams + 32 grams=_ _ _ _ _grams how would the mass of water formed in the reaction compare to the mass of oxygen and hydrogeb that reacts. in your response be sure to: include they type of change illustrated in the balanced eqaution

    asked by jeff
  141. English

    Word box adhere affirm atrocity audition cope deter disquieting empower fluent lag mangle misapprehension optimist prowl stupefy sulky supplement surge trait unscrupulous 1.He is so careless in handling his textbooks that by the end of the term he has

    asked by Jerald
  142. science help ASAP please

    1. Angiosperms have organs such as ______________ and produce seeds. The are described as _________________plants. (1 point) flowers; vascular stems; pollinated rhizoids; vascular leaves; non-vascular 4. Of the following, which is NOT a characteristic of

    asked by Delilah
  143. algebra

    factor 24x^2+123x+15

    asked by patti
  144. Math (Number Theory)

    The tortoise and the rabbit were in a 42 kilometer marathon. The rabbit can run 5 times as fast as the tortoise. Less than halfway into the race, the rabbit dropped his lucky rabbit's foot, and so stopped to try and find it. After finding it, he started

    asked by Hale
  145. Math

    Ericand frank want to equally share 1 and 1/3 feet of rope. What lenght of rope should each friend get?

    asked by Avery
  146. chemistry

    Chemical analysis of a germanium crystal reveals indium at a level of 0.0003091 atomic percent. Assuming that the concentration of thermally excited charge carriers from the Ge matrix is negligible, what is the density of free charge carriers (free

    asked by adex
  147. chemistry

    Determine the amount (in grams) of boron that when substitutionally incorporated into of silicon will establish a charge carrier density of carriers/cm .

    asked by adex
  148. geology

    If the tilt of the earth’s axis increased to 30 degrees, which of the following statements would be correct? (a) There would likely be a greater variation between summer and winter positions of the Sub Tropical Ridge. (b) Summers are likely to become

    asked by alex
  149. Mechanics

    Two objects with masses 5.60 and 2.40 hang 0.600m above the floor from the ends of a cord 8.00m long passing over a frictionless pulley. Both objects start from rest.Find the maximum height reached by the 2.40kg object

    asked by Sarah
  150. Economics

    A market failure is when markets do not bring about profit maximization?

    asked by Linda
  151. Physics

    An electrical cable is atteched to the electrical pole 25m apart. The cable weighs 2.5N/m and can resist a pull of 300N . assuming that the cable takes a parabolic shape, detrmine the smallest value of sag in the cable

    asked by Nirpendra
  152. chemistry

    How will an increase in pressure influence the amount of SO2(g) present at equilibrium?explain.

    asked by Pearl
  153. English

    1.Shortly after World War II, Japan began the great economic (sure, trait) that has put her among the world's top industrial nations surge 2.All those smooth words and vague promises are not going to (adhere, deter) us from doing what we know is needed to

    asked by Jerald
  154. Information Literacy

    Which of the following is true regarding doing an online search for information?

    asked by Anonymous
  155. Math-Help

    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
  156. Probabilities

    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 Anna
  157. calculus

    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 !@#$%^&tion p(x)= ACos(wx)+B that that gives the altitude in ft when the

    asked by Tom
  158. English

    16.Jackals and other scavengers now (prowl deter) through the ruins of what is once a great city prowl 17.A loud groan went through the class when we got the (unscrupulous disquieting) news that there would be a full period test later in the week

    asked by Jerald
  159. 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 its period for a mass of 2.4 kg? Answer in units of s

    asked by alice
  160. Chemistry

    Does Pb(NO3)2 + Cu has a reaction? if so, what will it be?

    asked by LG
  161. Chemistry

    Can someone please explain how to convert this, sadly I was absent the day we figured out how to do this in class. (H+1) pH (OH-1) pOH M M 2.5 2.5x10^-5 5.2x10^-2 5.2 These are the only answers given, I have to calculate the rest from them. Ive been

    asked by Kishwa
  162. quiz

    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 Anna
  163. quiz

    We are given 7 squares of side lengths 1, 2, 2, 2, 3, 4, 5. They can be fitted to form a rectangle, with no overlap or gaps in-between. What is the perimeter of the rectangle?

    asked by Anna
  164. Chemistry

    use the Hendeson-Hasselbalch equatio. To calculator the pH of a solution at is A) 0.15 M on C5H5N and 0.10M in C5H5NHCl. Kb:1.7x10^-9 B) 15.0 g of HF and 25.0g of NaFin 125 ml of a solution. Ka 3.5x10^-4

    asked by Jill
  165. geometry

    Derive the distance formula (d) shown below for points A = (x1, y1, z1) and D = (x2, y2, z2). 2 2 1 2 2 1 2 d = (x2 − x1) + (y − y ) + (z

    asked by denise
  166. please HELP ASAP :( pleasseee

    Exercise : A machine is set up such that the average content of juice per bottle equals μ . A sample of 36 bottles yeilds an average content of 48.5cl. Test the hypothesis that the average content per bottle is 50cl at the significance level. Assume that

    asked by yao
  167. weight

    If you decided to lose weight then ____ help?

    asked by melissa
  168. Algebraic

    Joan Arlington has twice as much money invested at 5% simple annual interest as she does at 4%. If her yearly income does she have at each rate? At 4%, she has At 5%, she has

    asked by Evelyn
  169. physics

    If the water had lost 12000 joules and the calorimeter gained 1300 joules as the temperature of both rock and calorimeter increased from 22°C to 73°C and the mass of rock in the calorimeter was 185 grams, what is the specific heat, c, of the rock

    asked by Shay
  170. health

    national weight control registry

    asked by melissa
  171. Physics

    Find the modulus direction cosin unit (1)4a-2b+3c (2)a-7b+5c (3)4a-3b+c

    asked by Angela
  172. Physics - Electric Potential

    A charge of - 0.15 C is moved from a position where the electric potential is 13 V to a position where the electric potential is 60 V. What is the change in potential energy of the charge associated with this change in position?

    asked by Danielle
  173. chemistry

    Calculate the lattice constant in palladium . Use only the information available in the class Periodic Table, and express your answer in angstroms.

    asked by adex
  174. Chemistry

    How much Pb(OH)2(in mg) can be added to 4.0liter of a 0.095 M KOH solution before precipitation starts? Ksp 4.2x10^-5

    asked by Joy
  175. physics

    Two particles, each of mass 3.00 kg and speed 5.41 m/s, travel in opposite directions along parallel lines separated by a distance 3.15 m. What is the magnitude of L, the angular momentum of the two-particle system around a point midway between the two

    asked by safc
  176. Geometry

    What is the surface area and lateral area of a regular triangular pyramid if the slant is 7 and the altitude is 5?

    asked by K
  177. science

    If a scale model of the planets are built with Earth's diameter set to 10 centimeters, how big would the model of Jupiter have to be in centimeters?

    asked by wyatt
  178. Maths

    Show proof of deriving the Quadratic Formula from the Quadratic Equation ax^2 + bx + c = )

    asked by Jeconiah
  179. Science

    Okay, I need help with balancing equations. It's so frustrating for a 7th grader! -_- My problem is: _Na3PO4 + _KOH = NaOH + _K3PO4

    asked by Chastity
  180. math

    Noor has 24 blockst .3 are red,7 are blue and the rest are white.what fraction of her blocks is white.write the fraction in simplest form

    asked by zainab mohammed
  181. science need help

    2 H2 + O2 -> 2 H2O 2 grams + 32 grams -> _ _ _ _ _ grams how would the mass of water formed in the reaction compare to the mass of oxygen and hydrogen that reacts? include types of change illustrated in the balanced equation. explain the conversation of

    asked by jeff
  182. math

    Please simplify and explain to me how to do each of these. Greatly appreciated. x = multiply sign (not a variable) a)((9)^(1/2) (4)^2) / 24 b) (16)(2)^(x+2) The x here is a variable, not multiplication sign) c) (3)^(-8)/ (3)^(-6) (3)^(-5) d) ((4)^(-2) +

    asked by Alicia
  183. advance functions gr 12

    Using rational functions solve x+5(numerator) x-3 (denominator) = 2x+7 (numerator) x(demominator)

    asked by Fadak
  184. Math advance functions gr 12

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

    asked by alex
  185. English

    1. Who are they? They are student reporters. 2. What are they? They are student reporters. 3. What's their job? They are student reporters. 4. What do they do? They are student reporters. (Which questions are suitable for the answer?)

    asked by rfvv
  186. Math-Help

    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
  187. English

    6. I will adhere affirm to the great ideas for which our ancestors suffered so much adhere

    asked by Jerald
  188. English

    10.After the conductor (auditioned supplemented) all the candidates for the position of first violinist he made his final choice auditioned 11.Everything that I have learned about Abraham Lincoln from history books (stupefies affirms) my reverence for this

    asked by Jerald
  189. Chemistry

    what are the products of Ca +H +OH-->?

    asked by LG
  190. FUNCTION TABLES

    I NEED TO WRITE AN EQUATION TO REPRESENT THE FOLLOWING FUNCTION INPUT X 1 2 3 4 5 OUTPUT Y 2 6 10 14 18 PLEASE HELP THIS IS MAKING US CRAZY

    asked by JOAN BELL
  191. LA

    For questions 7–11, each sentence is missing one type of punctuation. Choose the letter of the punctuation that correctly completes each sentence. 7. The pet stores shelves were filled with items I wanted for my pets. (1 point) apostrophe semicolon colon

    asked by Anonymous
  192. Algebra help!!

    help please!! 1. There is an E like symbol that has a 7 at the top. On the bottom k=1 and on the right side (-1)^k K 2. There is an E like symbol that has a 8 at the top. ON the bottom K=3 and on the right side (-1)K/K(k-2)

    asked by john
  193. BIOSTATISTICS

    Exercise : A machine is set up such that the average content of juice per bottle equals μ . A sample of 36 bottles yeilds an average content of 48.5cl. Test the hypothesis that the average content per bottle is 50cl at the significance level. Assume that

    asked by yao
  194. PLS HELP

    Which of the following statements is an opinion? A. a pet depends on it's owner for it's very life B.every one should have a pet c. studies have shown the health-related benefits of pets d. countless animals need homes i think it's a but im not sure

    asked by Anonymous
  195. Number Theory

    Yan was opening a new restaurant, so she went to the sign store to get letters to make a sign to hang above the storefront. When she got to the sign store, the only letters they had in stock were two copies of the letter 'X,' two copies of the letter 'E,'

    asked by Lily
  196. math

    if 3/4 of property cost rs 15000 what is the cost of 1/2

    asked by vaidehi
  197. English

    Wait 7 is stupefy 14 is disquieting and 20 is atrocity? 7.We were so ____ by the bad news that for a few moments we just sat there without moving or speaking 14.Naturally we were upset when we received the ____ news that our uncle had been taken to the

    asked by Jerald
  198. math

    mr.periwinkle owns a ranch.he wants to add an area in the shape of an equilateral triangle to one of his rectangular fields.if the length of the rectangular field is 3x feet and its area is (9x^2-6x)square feet,write an equation for the amount of fencing

    asked by lori
  199. Calculus

    Determine the equation ofthetangent line in slopeintercept form at x=1 of y^3 +2x^2=1 at x=1. Please show work so I can follow the process. Thanks!

    asked by Rene
  200. weight

    Obesity can cause a person to develop what type of conditions?

    asked by melissa
  201. Math110

    how many 6 - slots codes can be made up using 2 letters followed by 2 digits followed by 2 letters where All of the following conditions must be met: a. the allowable letters are A through G b. the allowable digits are 2 through 7 c. no digit can be

    asked by Demon
  202. Physics

    Find the modulus direction cosin unit vector 1) 4a-2b+3c (2) a-7b+5c (3)4a-3b+c

    asked by Angela
  203. maths

    What is the largest possible integer that can be chosen as one of five distinct positive integers whose average is 10? Details and assumptions The elements of a set are distinct, if no two of them are the same.

    asked by rohit
  204. Math

    1. The function r(w) = 2aw-2 + b + c where a, b and c are constants. w You are given that r(1) = 5; r’(4) = 12 and r′’(2) = 18. By substituting for w in the above function and its derivatives or otherwise, show that the three given function values

    asked by Amy
  205. Math

    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
  206. chemistry

    Which material would you expect to have a greater bandgap energy between indium nitride and indium phosphide ?

    asked by adex
  207. maths

    Let f(x)=x^2−1. How many distinct real roots are there to f(f(f(x)))=0?

    asked by rohit
  208. 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 rohit
  209. chemistry

    Gallium nitride is a semiconductor with a bandgap 3.2eV . Calculate the absorption edge of GaN . Express your answer in units of m .

    asked by adex
  210. chemistry

    what is the crystal system of the crystal structure of cesium chloride

    asked by adex
  211. math 6 grade

    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 Sue
  212. physics113

    find the modulus direction cosin unit vector 1)4a-2b+3c, 2)a-7b+5c, 3)4a-3b+c.

    asked by Angela
  213. Physics

    Find the modulus direction cosin unit vector 1)4a-2b+3c, 2)a-7b+5c, 3)4a-3b+c.

    asked by Angela
  214. Fundementals of Art

    Do you find that Claude Monet painting at the edge of a wood by John Singer Sargent depicts good contrast with asymmetrical balance or would Van Gogh's Starry Night be a better choice.

    asked by Candy
  215. Indonesian culture

    Q1: What is the puppet made of in the Indonesian shadow puppet show, wayang kulit? Q2: What is the white sheet made of in the Indonesian shadow puppet show, wayang kulit?

    asked by rfvv
  216. clinical

    a female aged 63 has high bp about 226/123 and develops diabetes type 2, and has a history of heart attack once. what medication n care should be provided to her?????

    asked by yao
  217. SST

    'SINGLE TRANSFERABLE VOTING SYSTEM OF PROPORTIONAL REPRESENTATION IS USED FOR THE ELECTION OF'

    asked by NISHI
  218. Algebra

    25sq2 – 21sq2 = 4(25 + 21) = 4 . 46 = 184

    asked by Ernie
  219. Maths

    Show proof of deriving the Quadratic Formula from the Quadratic Equation ax^2 + bx + c = O

    asked by Jeconiah
  220. math

    For a rock, paper, scissors experiment, there are 30 tries with a partner. I won 16/30 times. What's the probability of winning between 10 and 16 times inclusively? How do you solve this?

    asked by Liza
  221. Algebra 8th grade

    3a + 5b = 70 6a + 9b = 135

    asked by Anon
  222. advance functions gr 12

    Using rational functions solve x+5(numerator) x-3 (denominator) = 2x+7 (numerator) x(demominator)

    asked by Fadak
  223. English

    5.It is far better to know you are ignorant of something than to act on the basis of wrong information and (misapprehensions auditions) misapprehensions

    asked by Jerald
  224. advance functions gr 12

    Using rational functions solve 3(numerator) 2x-4 (denominator) < (with a "-" underneath) 4 (numerator) x-2(demominator)

    asked by james
  225. English

    1. What is the cooking classroom like? It's just like a big kitchen. 2. What does the cooking classroom look like? It looks just like a big kitchen. (Are both grammatical?) 3. What is the score? It's 3 to 1. 4. What is the score between them? The score is

    asked by rfvv
  226. Math

    Whats the answer for 0.15 divided into 0.1845

    asked by Ava
  227. math

    a bag of marbles contains 5 green 4 red and 6 yellow what is la probability of drawing 2 yellow with replacement.

    asked by juan
  228. Math

    Which is the last step in taking a survey? (Choices)... A. Explain the results B. write a survey questions C. Count tallies D. Make a tally chart and ask question.

    asked by Thea
  229. math

    what does the second term and the fourth term mean?

    asked by emma
  230. Algebra help

    I need some help I posted the first question to this a bit ago but didn't enter it correctly so sorry to those who helped! I also have a 2nd half which I understood till they added the dividing part. I need to find the first five terms of each recursive

    asked by John
  231. Algebra

    I have two problems that I need some help with. I believe I got to the answer but not quite sure if its right. I need to expand and evaluate each series. 1. There is an E like symbol that has a 7 at the top. On the bottom k=1 and on the right side (-1)^k K

    asked by John
  232. math

    7^6 divided by 7^7

    asked by rhianna
  233. 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
  234. Algebra

    I have several of these problems and am having trouble getting the hang of it. Can you help me? Factor. If the result is the square of a binomial, write it as such. If the result is prime, so state. Here are the first couple of problems. 1) x^2 + 7x + 12

    asked by Mary
  235. math

    Nancy made the following statement: The range of f(x) = ax + b is the set of all real numbers given that a and b are real numbers. Which produces a counter example to her statement?

    asked by Tara
  236. Math

    Which is the best estimate of -15/16 divided (-1/2)?

    asked by Hannah
  237. Fitness

    If your use soymilk on regular basic, you should select a variety that’ A. fortified with protein. B enriched with calcium and vitamins. C. chocolate or vanilla flavored. D. Naturally fat fee I think the answer is "A"

    asked by Jen
  238. Chemistry

    Does mass affect pressure? I understand volume, and temperature does but not sure about mass. If I have a gas with mass 15 g, wont this exert less pressure than a gas have a mass of 30 g?

    asked by Shadow
  239. weight

    why is having abdominal fat a serious concern

    asked by melissa
  240. health

    for adults which ranges reflect an accurate BMI category

    asked by melissa
  241. 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!!...MS SUE!
  242. algeBRA!!!

    What is the sum of the rational roots of f(x)=x^3−4x^2+16x−39?

    asked by please help me out!!
  243. inTEGERS!

    How many positive integers less than 1000 are odd but not a multiple of 5

    asked by please help me out!!
  244. math

    This is a matrix question but I can't get a single bracket so I will use two. (a b)(5 1) =(12 -2) (3 0)(-2 4) (15 3) Find the values of a and b.

    asked by lindsay
  245. maths

    x,y and z are positive reals. What is the maximum value of ((x+y+z)^3−x^3−y^3−z^3)^2/(x^2+y^2+z^2)^3−x^6−y^6−z^6

    asked by rohit
  246. maths

    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 ab where a and b are coprime positive integers. What is the probability of a+b?

    asked by rohit
  247. math

    a family wants to build a pool their yard is 20 yards wide and thirty yards deep. unfortunately, the dealer only deals in liter size pools. what is the biggest size pool they can get?

    asked by kara
  248. maths

    6 7 7 divided by 7

    asked by rhianna
  249. maths

    6 7 7 divided by 7

    asked by rhianna
  250. Life orientation

    Identify and describe 3 environental health hazards that cause ill health,accidents

    asked by Unesio
  251. math 6 grade

    A discount store is having a sale on CDCs.7 CDs cost $65.45 ,what is the price per CD?

    asked by carina
  252. Algebra

    When factoring an equation, how do I know if the result is prime? For example, I have a problem x^2 - 2x + 4 and I think it is prime because I can't solve it. Am I right?

    asked by Mary
  253. Math

    Find the area of a figure with the dimensions being 7 1/2 ft x 3 1/4. Please answer and explain.

    asked by Anonymous
  254. English

    I'm writing a comparison paper on artworks and I'm just thinking either to write about two women painting (European/modern women) OR two churches Gothic/Romanesque). Which one do you think will have more visual/background information? I was thinking to

    asked by Katie
  255. physics

    Two forces acts on a point. 100N at 170⁰ from the tx-axis and 150N at 50⁰. Find their resultant force and the direction, from the tx-axis.

    asked by ehm
  256. 4th math

    a game is played with a spinner labeled a-d and a cube numbered 1-6. determine the number of possible outcomes. make a tree diagram.

    asked by pollo
  257. college algebra

    I need help solving this equation. 3√z+1=-3 How do I do this problem? Thanks for your help.

    asked by Anonymous
  258. math

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

    asked by lily
  259. math

    what is 5/12+7/8

    asked by pemba
  260. maths

    Find the number of different ordered quadruples (a,b,c,d) of complex numbers such that a^2=1 b^3=1 c^4=1 d^6=1 a+b+c+d=0

    asked by stranger
  261. math

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

    asked by lily
  262. Information Litreacy

    Search engines are most useful for finding?

    asked by Anonymous
  263. Probabilities

    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 are coprime positive integers. What is the value of a+b

    asked by Anna
  264. Math

    If a data set is: 18, 9, 14, 10, 15.... What would be the mean absolute deviation? What I got was 13.2, but it seems incorrect. Please help!

    asked by Ginny
  265. Math

    5+5*9/56 How do I fing this in the order of operations?

    asked by DomoOrregatoMrRoboto
  266. Maths

    Let f(x)=x^2 -1 . How many distinct real roots are there to f(f(f(x)))

    asked by Anna
  267. 7th Grade Language Arts

    Cultural context involves all of the following except the group's __________. (1 point) values wealth customs I think its wealth.. but not sure, am i correct?

    asked by Gabby
  268. computers

    what is a softeware and it is uses.

    asked by mohdwhid
  269. Choosing Numbers That Sum to 50

    What is the largest possible integer that can be chosen as one of five distinct positive integers whose average is 10?

    asked by please help me out!!
  270. math

    This is a matrix question. R is the matrix (3r 1) (s 2s) 1. State, in terms of s and r the determinant of R 2. If r=1/3 and s=4 determine the inverse of R 3.State the pair of r and s not including 0, which would make the matrix R a singular matrix

    asked by lindsay
  271. CHEMYSTRY

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

    asked by NAYLA
  272. Math 0098

    U^2/3 Over U^2/3 Simplify. The fractions are powers just so you know.

    asked by Anonymous
  273. math

    what is 0.06% of 250? show me the problem

    asked by doretha
  274. Math

    Ryan is making an apple design with 28 stencils.the bottom 3 row are shown at the rigth. How many more rows will Roy need to put on top to complete the pattern?

    asked by Pietro