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Questions Asked on
May 7, 2013

  1. Calculus

    A piece of wire 40 m long is cut into two pieces. One piece is bent into a square and the other is bent into an equilateral triangle. How should the wire be cut so that the total area enclosed is a maximum= minimum= Find the length of the wire used

    asked by Brian

  2. chemistry

    If the endpoint in the titration of KHC8H4O4 solution with the NaOH solution is mistakenly surpassed, will the molar concentration of NaOH solution be reported too high or too low?

    asked by Kerapetsi

  3. physics!

    Late one night on a highway, a car speeds by you and fades into the distance. Under these conditions the pupils of your eyes have diameters of about 7.0 mm. The taillights of this car are separated by a distance of 1.2 m and emit red light (wavelength =

    asked by Ashley

  4. Pre Calc

    Alice throws a ball straight up with an initial speed of 40 feet per second from a height of 5 feet? a) Find parametric equations that model the motion of the ball as a function of time. b) How long is the ball in the air? c) When is the ball at its

    asked by Rebekah

  5. Chemistry

    An antacid tablet containing magnesium hydroxide instead of calcium carbonate was dissolved in 100.0 mL of 0.2893 M HCL. 10 mL of this solutions was titrated to endpoint with 25.20 mL of 0.1007 M NaOH. How much magnesium hydroxide was in the antacid

    asked by Mindy

  7. chem

    how much heat is emitted when 65.6 g of isopropyl alcohol condenses at 25 degrees C

    asked by Anonymous

  8. Physics

    In a control system, an accelerometer consists of a 5.15-g object sliding on a calibrated horizontal rail. A low-mass spring attaches the object to a flange at one end of the rail. Grease on the rail makes static friction negligible, but rapidly damps out

    asked by Abdalla A.

  9. PHYSICS

    Two parallel slits are illuminated by light composed of two wavelengths. One wavelength is λA = 553nm. The other wavelength is λB and is unknown. On a viewing screen, the light with wavelength λA = 553nm produces its third-order bright fringe at the

    asked by Ashley

  10. Physics

    1- you push a coin across a tabble, the coin stops. How does this motion relate to balanced and unbalanced forces?

    asked by Kate

  11. algebra

    the vertices of quadrilateral EFGH are E(-7,3) F (-4,6) G (5,-3) and H (2,-6) what kind of quadrilateral is EFGH

    asked by jan

  12. math

    A shop sells one-pound bags of peanuts for $2 and three-pound bags of peanuts for $5. If 9 bags are purchased for a total cost of $36, how many three-pound bags were purchased?

    asked by ja'Sae

  13. College Chemistry 104

    A voltaic cell consists of a Pb/Pb2+ half-cell and a Cu/Cu2+ half-cell at 25 C. The initial concentrations of Pb+2 and Cu+2 are 0.0500 M and 1.50 M, respectively. A. What is the initial cell potential? B. What is the cell potential when the concentration

    asked by Samm

  14. Physics Need help please

    An ancient wooden club is found that contains 270g of carbon and has an activity of 8.3 decays per second. Determine its age assuming that in living trees the ratio of 14C/12C atoms is about 1.3x10^-12? t= in years

    asked by Leila

  15. Economics

    got this from my teacher, A monopolist faces a demand curve given by the following equation: P = $500 − 10Q, where Q equals quantity sold per day. Its marginal cost curve is MC = $100 per day. Assume that the firm faces no fixed cost. and have the

    asked by Julie

  16. Chemistry

    What is the equilibrium constant for the reaction: Si + O2 SiO2 ? Is the answer just [SiO2]/[Si][O2] ?

    asked by Anonymous

  18. Chemistry

    An unknown solid acid is either citric acid or tartaric acid. To determine which acid you have, you titrate a sample of the solid with NaOH. The appropriate reactions are as follows: Citric acid: H3C6H5O7 (aq) + 3NaOH (aq) -> 3H2O (l) + Na3C6H5O7 (aq)

    asked by Sarah

  19. Chemistry

    Which two elements is the second transition series (y through Cd) have four unpaired electrons in their 3+ ions?

    asked by Sarah

  20. Algebra 1

    Emily rows six miles downstream in 1 hour and her friend Ashley,rowing 1 mile per hour faster,completes the return trip in 2 hours. 1.Find the speed of the current(c) and each girls rowing speed. 2.If Emily and Ashley were rowing separately,who would

    asked by Jane

  21. Chemistry

    A substance releases 496kJ of heat as 2.60 moles condense from a gas into a liquid. What is the molar heat of vaporization of the substance?

    asked by Anonymous

  22. Algebra 2

    A culture started with 2,000 bacteria. After 6 hours, it grew to 2,200 bacteria. Predict how many bacteria will be present after 12 hours. Round to the nearest whole number.

    asked by Kevin

  23. Math

    2500 students take a college entrance exam. The scores on the exam have an approximate normal distribution with mean u = 52 points and a standard deviation o = 11 points. Estimate the percentage of students scoring 52 points or more. ^ How would you do

    asked by Ruth

  24. consumer math

    The amount that results when $2,000 is compounded at 8% annually over six years

    asked by Anonymous

  25. Math story problem

    A satellite dish is shaped like a paraboloid of revolution. the signals that emanate from a satellite strike the surface of the dish and are reflected to a single point, where the receiver is located. If the dish is 14ft across at its opening and 4ft deep

    asked by Hannah

  26. Spanish 2

    All the verbs that have not been conjugated need to be either in preterite or imperfect form. My spanish teacher hasn't really explained it that well and I am confused on how to know whether its imperfect or preterite.Now we have a test on it tomorrow. Can

    asked by Jessica

  27. Chemistry

    The voltage generated by the zinc concentration cell described by, Zn(s)|Zn2 (aq, 0.100 M)||Zn2 (aq, ? M)|Zn(s) is 23.0 mV at 25°C. Calculate the concentration of the Zn2 (aq) ion at the cathode. Can someone please breakdown how to do this so I can figure

    asked by Chris

  29. Chemistry

    A voltaic cell consists of a Pb/Pb2+ half-cell and a Cu/Cu2+ half-cell at 25 C. The initial concentrations of Pb+2 and Cu+2 are 0.0500 M and 1.50 M, respectively. A. What is the initial cell potential? B. What is the cell potential when the concentration

    asked by Samm

  30. Physics help!

    The range of human hearing extends from approximately 20 Hz to 20,000 Hz. Find the wavelengths of these extremes at a temperature of 2°C. 20 Hz? 20000 Hz?

    asked by Abdul A.

  31. Statistics

    If x is a binomial variable with p = .4 and n = 25, write the probability that you would be looking for after you have applied the continuity correction factor for the following conditions for x: 3) x = 5 4) x > 5 5) x ≤ 5

    asked by Anonymous

  32. Physics help!

    There is evidence that elephants communicate via infrasound, generating rumbling vocalizations as low as 14 Hz that can travel up to 10 km. The intensity level of these sounds can reach 105 dB, measured a distance of 4.5 m from the source. Determine the

    asked by Abdul A.

  33. Math

    A ship travels NE (45 degrees) at 18 knots with a current of 8 knots direction North. What is the bearing of the ship and speed in knots?

    asked by Elizabeth McKay

  34. Algebra

    What is the simplified form of (2a2b)2 (3ab3c)/4a4b8c2

    asked by Keondre

  35. physics HELP!!

    An object is moving along a straight line, and the uncertainty in its position is 2.40 m. (a) Find the minimum uncertainty in the momentum of the object. Find the minimum uncertainty in the object's velocity, assuming that the object is (b) a golf ball

    asked by Ashley

  36. Math

    The area of a hexagon is 42 square cm. If all the dimesions of the hexagon are multiplied by 3, what will be the area of the new figure? a) 126 cm2 b) 252 cm2, c) 378 cm 2 d) 14 cm2 I took 42 cm x 3 and got 126 cm2 did I work this correctly?

    asked by Daniel

  37. maths

    1.how many non congruent right triangles with positive integer leg lengths have areas that are numerically equal to 3 times their perimeters? 2.a triangle with side lengths in the ratio 3:4:5 is inscribed in a circle of radius 3.what is the area of the

    asked by ramesh reddy

  38. chemistry

    The density of CO2 (g) at 25°C and 715 torr is:

    asked by Anonymous

  40. statistics

    Assume that body temperatures of healthy adults are normally distributed with a mean of 98.2°F and a standard deviation of 0.62°F. Find the 90th percentile of the sample mean body temperatures for samples of size 16.

    asked by ali awan

  41. Physics

    A mechanic pushes a 2.60 103-kg car from rest to a speed of v, doing 5,000 J of work in the process. During this time, the car moves 21.0 m. Neglecting friction between car and road, find each of the following. (a) the speed v? (b) the horizontal force

    asked by Abdalla A.

  42. physics

    An object is moving along a straight line, and the uncertainty in its position is 2.40 m. (a) Find the minimum uncertainty in the momentum of the object. Find the minimum uncertainty in the object's velocity, assuming that the object is (b) a golf ball

    asked by Ashley

  43. CHEM

    IF A 50.0 ML SAMPLE OF CALCIUM HYDROXIDE IS TITRATED WITH 25.0 ML OF 0.200M PHOSPHORIC ACID, WHAT IS THE MOLARITY OF THE BASE?

    asked by SHANNA

  44. ochem

    Consider a sample that is a mixture composed of biphenyl, benzoic acid, and benzyl alcohol. Predict the order of elution of the components in this mixture on the TLC plate when solvent system a, b or c is used. a)Cyclohexane: Methylenechloride:100%:0%

    asked by bez

  45. geometry!!!! PLEASE HELP!!!!

    A,B,C,D,E,F are 6 consecutive points on the circumference of a circle such that AB=BC=CD=10,DE=EF=FA=22. If the radius of the circle is √n, what is the value of n? Details and assumptions: -The lengths given are side lengths, not arcs.

    asked by fudgee

  46. Calculus 1

    A car comes to a stop six seconds after the driver applies the brakes. While the brakes are on, the following velocities are recorded: Time since brakes applied (sec) 0 2 4 6 Velocity (ft/sec) 83 40 11 0 Give lower and upper estimates for the distance the

    asked by Dolores Ramirez

  47. accounting

    A company was recently formed with $ 50,000 cash contributed to the company by stock-holders. The company then borrowed $ 20,000 from a bank and bought $ 10,000 of supplies on account. The company also purchased $ 50,000 of equipment by paying $ 20,000 in

    asked by dan

  48. Algebra 2

    A 14 gram sample of a substance that's used to preserve fruit and vegetables has a k-value of 0.1092. Find the substance's half-life, in days. Round your answer to the nearest tenth.

    asked by Tristan

  49. URGENT~MATH For Steve or Reiny

    For questions 5-7, find the solution to the system of equations by using either graphing or substitution. 5)y=6-x and y=x-2 (1point) (2,4) (-4,2) (4,2) no solutions 6)y=2x-1 and y=x+3 (1point) (4,7) (7,4) (-7,-4) no solutions 7) y=4x and y+x=5 (1point)

    asked by Gabby

  51. statistics

    Participants from the National Health and Nutrition Examination Survey, 2003–2004, had a mean BMI of 28.3 with a standard deviation of 6.0. Assuming BMI is normally distributed, what proportion of the participants had a BMI measure over 35?

    asked by ali awan

  52. statistics

    A certain professional soccer team runs a 4-4-2 formation on the field. This means they play with 4 defenders, 4 midfielders, 2 forwards, and 1 goalkeeper on the field. If the team has 6 defenders, 5 midfielders, 3 forwards, and 2 goalkeepers, how many

    asked by amgad ahmed

  53. chemistry

    the solubility of the fictitious compound administratium fluoride in water is 3.091e-4.calculate the value of solubility product ksp

    asked by himani.

  54. calculus

    If the unicorn seat on a merry-go-round is 5 feet from the center, and the merry-go-round completes a full rotation in 6 seconds, how many feet does the unicorn travel in one second?

    asked by chely

  55. Physics Help me Someone plz

    If a galaxy is traveling away from us at 2.0% of the speed of light, roughly how far away is it? t= light years I got 2.4x10^8 light years but its wrong please help me out...thank you Physics Plz help me - Anon, Monday, May 6, 2013 at 9:17pm 5.98x10^6

    asked by Leila

  56. Physics help!

    On a hot summer day, the temperature of air in Arizona reaches 118°F. What is the speed of sound in air at this temperature? (Enter your answer to four significant figures. The speed of sound at 0°C is 331 m/s. Use the conversion 0°C = 273 K as

    asked by Abdul A.

  57. Calculus 1

    The velocity v(t) in the table is increasing,0

    asked by Dolores Ramirez

  58. Chemistry

    One chirality of CH3CHCICOOH is shown below. COOH | C H3C/ \CI - - - H Identify the image(s) below that excibit the opposite chirality. Select all that apply. (a) COOH (b) H | | C C _ | _ / \ _ | _ H3C CI _ | _ _ _ | _ _ CI | CH3 _ H COOH (c) CI (d) COOH |

    asked by Anonymous

  59. chemistry

    Why would methanol be used to halt a secondary alcohol and catalyst reaction?

    asked by Anonymous

  60. Math

    1. 0.3x0.5=0.15 2. 1.2x2.1=2.52 3. 2.5x6.7=16.75 4. 0.4x8.3=3.32 5. 2.3x1.21=2.783 6. 0.6x0.91= 0.546 7. 6.5x 0.04=0.260 8. 8.54x3.27=27.9258

    asked by Jerald

  62. Chemistry

    Estimate how many microwave photons with 1=12 cm must be absorbed to raise the temperature of your eye by 3 degree C. Assume the mass of an eye is 11 g and its specific heat capacity is 4.0 J/g/k

    asked by Sarah

  63. Math

    Evaluate each expression if x= 2.1 y =0.031 and z = 3.05 22. xy+z 3.1151 23. y+xz 6.436 24. x X 13.55 i y 27.424

    asked by Jerald

  64. Math

    This box plot shows the heights in inches of girls on a freshman basketball team. What would you say is a typical height of a team member? I can't show the box plot on here, but I would like to know what a "typical height" is. Like is this asking for an

    asked by Cassidy

  65. chemistry

    calculate the solubility product of leadchloride in pure water.your answer should be in units of molarity raised to the appropriate exponent.

    asked by himani.

  66. Science

    These are some more questions, they're not multiple answers they're S.A so the questions will be first and my answers will be on the bottom. 17. Describe the difference between thermal energy and temperature. Use the following words to help structure your

    asked by Annabelle Hartz

  67. Math

    At the Statsville County Fair, the probability of winning a prize in the basketball toss game is 0.1. a) Show the probability distribution for the number of prizes won in 8 games (round to 6 decimal places). b) If the game will be played 500 times during

    asked by Lily

  68. ENGLISH

    6. The most common rule for forming plural nouns is A. adding -es to the word. B. changing the y to i and adding -es. C. dropping the last letter and adding -ies. D. adding -s to the word.

    asked by NANA

  69. Psychology

    Personality disorders are thought to originate during childhood but many health professionals are reluctant to diagnose children. Why is this? I need to know the positives and negatives of early diagnosis of personality disorders in children. Can someone

    asked by Kelly

  70. chemistry

    what is the value of degree of polymerization of isotactic PB with a molecular weight of 3.091e5 g/mol

    asked by himani.

  71. maths

    rhombus ABCD is similar to rhombus BFDE. The area of rhombus ABCD is 24,and angle BAD=60degreees.what is the area of rhombus BFDE?

    asked by ramesh reddy

  73. Physics

    A horizontal force of 150 N is used to push a 32.5-kg packing crate a distance of 4.95 m on a rough horizontal surface. If the crate moves at constant speed, find each of the following. (a) the work done by the 150-N force? (b) the coefficient of kinetic

    asked by Abdalla A.

  74. Math

    Maximize P= 8x1+12x2 Subject to 2x1+4x2

    asked by SHelley

  75. PHYSICS

    In the lungs there are tiny sacs of air, which are called alveoli. An oxygen molecule (mass = 5.30 × 10-26 kg) is trapped within a sac, and the uncertainty in its position is 0.120 mm. What is the minimum uncertainty in the velocity of this oxygen

    asked by Ashley

  76. physics

    Two stars are 2.4 × 1011 m apart and are equally distant from the earth. A telescope has an objective lens with a diameter of 1.72 m and just detects these stars as separate objects. Assume that light of wavelength 590 nm is being observed. Also, assume

    asked by Ashley

  77. Life Orientation

    Critically discuss 10 ways in which the environmental health hazard can impact negatively on one's health

    asked by Kelebogile

  78. physics

    A wire is made of a material with a resistivity of 4.85109 × 10−8 Ω · m . It has length 5.57436 m and diameter 0.36396 mm . What is the resistance of the wire? Answer in units of Ω

    asked by Anonymous

  79. Chemistry

    A gas occupying a volume of 664 mL at a pressure of 0.970 atm is allowed to expand at constant temperature until its pressure reaches 0.541 atm. What is its final volume?

    asked by Logan

  80. ENGLISH

    7. In which of the following sentences is the underlined verb in the future perfect tense? A. They will take the dog to the park with them. B. She really should begin to pack. C. Jean's daughter has begun to drive. D. By that time, he will have been gone

    asked by NANA

  81. arithmetic

    james used the rule add 2 to create a sequence.the he used the rule add 12 to create a second sequence.what are the first five terms in each sequence james created?

    asked by katherine

  82. statistics

    Find the value of Z that is smaller than 90% of all values of Z.

    asked by ali awan

  84. Chemistry

    Explain why iron corrodes more quickly in seawater than in freshwater. I'm getting conflicting answers from searching on Google; is it because the corrosion of iron is a redox reaction, which involves a transfer of electrons, and therefore this transfer of

    asked by a Canadian

  85. chemistry

    calculate the enthalpy of mixing for the solution of 10% platinum and 90% gold .express your answer in units of kg/mole

    asked by himani.

  86. geometry

    find acute angles A and B satisfying cot(A+B)=1 , cosec(A-B)=2

    asked by ajit yadav

  87. Physics

    A 69-kg base runner begins his slide into second base when he is moving at a speed of 3.7 m/s. The coefficient of friction between his clothes and Earth is 0.70. He slides so that his speed is zero just as he reaches the base. (a) How much mechanical

    asked by Abdalla A.

  88. Algebra

    Square root 18 + 3/square root 2

    asked by Brittany

  89. Science

    Please check my answers (at the bottom) with these questions. 1. An apple quickly changes color when exposed to air. This demonstrates a ________. (1 point) physical property chemical property physical change all of the above 2. When a chunk of dry ice is

    asked by Annabelle Hartz

  90. geometry

    find acute angie A and B satisfying cot(A+B)=1 , cosec(A-B)

    asked by ajit yadav

  91. Science

    100 ml of water at 20 degrees celcius has more,less, or the same thermal energy than 500 ml of water at 20 degrees?

    asked by Abby

  92. chemistry

    Why would methanol be used to halt a secondary alcohol and catalyst reaction?

    asked by Anonymous

  93. Math

    Find the sum of the G.p.2+6+18+54+...+1458

    asked by Haleemath

  95. ochem

    Give the reaction products of sodium borohydride (followed by water addition at the end of the reaction) with the following compounds: a) Acetone b) m-nitroacetophenone c) 3-buten-2-one

    asked by ang

  96. Math (Percentage)

    An upscale clothing boutique charges $300 for a brand name pair of jeans, which is 50% more than the amount it costs the store to buy one pair of these jeans. As a benefit of working there, employees can purchase the pair of jeans at 30% off the store's

    asked by Shin

  97. chemistry

    How many moles of sodium nitrate are in 0.65L of a 0.2 M NaNO solution?

    asked by Alex

  98. stoichiometry

    what is the mole ratio of oxygen to water

    asked by jojo

  99. Science

    If A tank with a flat bottom is filled with water to a height of four meters. what is the pressure at any point at the bottom of the tank? my teacher wants me to ignore atmospheric pressure when calculating my answer A. 3.5 kPa B. 3,500 kPa C. 34.3 kPa D.

    asked by Caitlin

  100. Physic

    The composite bar BCD in the figure is composed of an inner aluminum cylindrical core of length 2L=2 m and radius R=1 cm, and a sleeve of steel of length L=1 m and thickness R=1 cm surrounding the aluminum core in the CD section of the bar. The bar is

    asked by Me

  101. Physics

    Which causes an object in motion to stay in motion? A) friction b) gravity C) inertia D) velocity Its not friction..

    asked by Kate

  102. geography

    what is granular disintergration?

    asked by aross

  103. Chemistry

    A gas occupying a volume of 664 mL at a pressure of 0.970 atm is allowed to expand at constant temperature until its pressure reaches 0.541 atm. What is its final volume?

    asked by Logan

  104. math

    kyle gave 1/4 cookies to her brother, gave 23 cookies to her friend. He gave 2/10 of remaining cookies to his mother. Then took 5/8 to school to share. how many cookies did Kyle have left

    asked by kalle

  106. Math

    A ladder is in a safe position if the height it reaches on the wall is four times the distance of the base from the wall. To the nearest tenth of a foot, find the length of the following ladder. The ladder must reach a 16-foot height.

    asked by Cass

  107. math

    One of your dresser drawers contains 10 black socks and 10 blue socks. Suppose it is dark and you can’t tell what color a sock is when you look at it. If you start taking socks randomly one at a time from the drawer, how many would you have to take to

    asked by Anonymous

  108. History

    The city of Philadelphia is located near which lines of latitude and longitude?

    asked by Ellisyn

  109. Physics

    Estimate the total binding energy for copper. 550 MeV Estimate the energy, in joules, needed to break a 3.0g copper penny into its constituent nucleons. E= in Joules Please help me out I got 1st part I need the Energy in joules am confused please help me

    asked by Leila

  110. Chemistry

    Explain, not just describe, the relationship between these rankings. Most reactive to least reactive metals: Zn, Pb, Cu, Ag Most reactive to least reactive metal cations: Ag, Cu, Pb, Zn

    asked by Jaden

  111. math

    Joey has a beach ball with a radius of 20 cm. What volume of air will it hold when fully inflated?

    asked by Nadia

  112. Bookkeeping

    Do you have the answers for the exams under bookkeeping course in pennfoster?

    asked by Chrisitna

  113. IIT-JEE

    i have to prepare for my IIT-JEE examination. But i have no knowledge about the books for preparation. Please tell me some books for the preparation of objectives for IIT-JEE. Now i am in 10+2 class.

    asked by jacob

  114. 2

    from 962 which eves number has 6 tens

    asked by maria

  115. Physics Plz help me

    If a galaxy is traveling away from us at 2.0% of the speed of light, roughly how far away is it? t= light years I got 2.4x10^8 light years but its wrong please help me out...thank you Physics Plz help me - Anon, Monday, May 6, 2013 at 9:17pm 5.98x10^6

    asked by Leila

  117. statistics

    According to the Census Bureau's 2002 American Community Survey, the average travel time to work of workers 16 years and over living in Boston, MA, who did not work at home, was 28.2 minutes with a standard deviation of 0.79 minutes. A sample of 35 commute

    asked by ali awan

  118. math

    make a line plot for each set of data. Identify any clusters, gaps and outliers. daily low temperatures 26F, 25F, 24F, 29F, 28F, 21F, 10F number of stories in town buildings 3, 3, 1, 1, 8, 6, 6, 4, 3, 23, 7, 9

    asked by eileen

  119. Math

    A woman rides her bicycle from her house to and from a lake. It takes her 1 1/2 hours to ride to the lake and 1 3/4 hours to ride back. She rides downhill at 12 kilometers per hour, on level ground at 8 kilometers per hour, and uphill at 6 kilometers per

    asked by Bob

  120. Math

    Using logarithm table,solve,0.016*0.084/0.48

    asked by Haleemath

  121. math

    A round tank hold 550 gallons filled to the brim. Its capacity is 10 gallons for every inch in height. How high is the tank in inches, in feet. How high would you fill it get to the 170 gallon level?

    asked by Jerome

  122. Interest

    It’s time to go shopping! You grab your Best Purchase credit card, which has an annual interest rate of 18%. The unpaid balance on your card for the current billing cycle is $285.76. On your shopping trip, you purchase four items: a Blu-ray player, two

    asked by Mary

  123. Science

    1. What is molarity of products? I can't decide if it's a. The concentration of the reactants measured in mol/L of solution or b. The concentration of the products measured in mol/L of solution 4. How does pressure relate to reaction rates? I'm stuck

    asked by mysterychicken

  124. hyperbolas

    Find an equation for the hyperbola whose graph has vertices (+/-5,0) and foci (+/-7,0)

    asked by dylan

  125. Math

    Can the sum of two mixed numbers be equal to 2. Also what does 21. 11/12 plus 17. 5/12.

    asked by Gurleen Kaur

  126. algebra!!!! please help me!!!!

    Suppose θ is an angle strictly between 0 and π/2 such that sin5θ=(sin^5)θ. The number tan2θ can be uniquely written as a√b, where a and b are positive integers, and b is not divisible by the square of a prime. What is the value of a+b?

    asked by flex

  128. Math

    You estimate there is an 80% chance you will get an A on your math final, and a 75% chance you will get an A for your semester grade. What is the probability that both will happen?

    asked by ValeeRo

  129. Phase Changes

    The heat of vaporization of water is 2.26 kJ/g. How much heat is needed to change 3.74 g of water to steam?

    asked by Jenny

  130. Math/Probability

    How do I calcuate probability word problems

    asked by Nikki

  131. calc

    If an open box has a square base and a volume of 91 in.3 and is constructed from a tin sheet, find the dimensions of the box, assuming a minimum amount of material is used in its construction.

    asked by Anonymous

  132. Probability Math

    A committee of four students will be selected from a list that contains six Grade 9 students and eight Grade 10 students. What is the expected number of Grade 10 students on the committee?

    asked by Lily

  133. Math

    Evaluate each expression if x= 5.07 y=1.5 and z=0.403 7. 3.2x+y 16.224 8.yz+x 5.6745

    asked by Jerald

  134. chemistry

    a stone is thrown vertically upwards from the edge of a tower with velocity 5m/s.it strikes the ground close to the base after 4s .the height of tower?

    asked by aswini

  135. Math (Probability)

    Four players are playing a game involving choosing positions on a grid of size 3×8. Each player chooses a random position on the grid, then all players reveal their choices and a token is placed on each of the positions. The probability that the tokens

    asked by Tom

  136. English II

    "Base Details" If I were fierce, and bald, and short of breath, I’d live with scarlet Majors at the Base, And speed glum heroes up the line to death. You’d see me with my puffy petulant face, Guzzling and gulping in the best hotel, Reading the Roll of

    asked by bob

  137. Math

    Two cars run at constant speeds around a one-mile racetrack. The faster car passes the slower car every two minutes if the cars run in the same direction. If they run in opposite directions, they meet every 15 seconds. Find the speed of the faster car in

    asked by Bob

  139. Math

    give a one-sentence definition fora polynomial equation

    asked by Jenny

  140. geometry

    Γ is a circle with radius 10 and center O. A and B are points on Γ such that the arc length ABˆ=13. What is the area of sector AOB?

    asked by girija prasad lenka

  141. Statistics

    You have a ten question multiple choice test in your next class and you did not study at all. Each question has four choices and only one correct answer. You are going to guess on each question. What is the probability that you score at least a 20% on the

    asked by Liz

  142. Life orientation

    Name two institutions that involved in supporting or giving redress to homelessness .

    asked by Thembelihle

  143. life orientation

    environmental or human factor that cause ill health

    asked by Anonymous

  144. Units of Volume and Capacity

    Greater than, less than, equal to: 30 mL ___ 30cm cubed 100cm cubed ___ 1 gallon Please explain.

    asked by Celest

  145. dynamics

    Mass of 2.3 kg and 4.5 kg is connected with the cord as shown. The coefficient of kinetic friction between box and floor is 0.35. Determine: a)The tension in the cord b)The acceleration of the blocks c)If the block start slides with 2.3 m/s, d)How far does

    asked by ruby

  146. Pre Calc

    A plane (A) heading south at 120 mph and a plane (B) heading west at 600 mph are rlying tword the same point at the same altitude. Plane A is 100 miles from the point where the flight patterns intersect and plane B is 550 miles from there. A) Find the

    asked by Rebekah

  147. algebra

    A coffee shop sells small cups of coffee and large cups of coffee. A small cup of coffee costs $2. A large cup of coffee costs $3. On Tuesday, the store sold a total of 155 cups of coffee for a total of $335. How many small cups of coffee did the store

    asked by anna

  148. the fallacies of generalizing PLEASE HELP!

    A quasi-scientific study was done to find some link to autism. In the study, it was found that children who had an autistic tendency were delivered after an average of about 30 hour labor. They all weighed an average of 10 pounds. The study was done in a

    asked by Steve

  150. Physics

    A rowboat crosses a river with a velocity of 3.37 mi/h at an angle 62.5° north of west relative to the water. The river is 0.590 mi wide and carries an eastward current of 1.25 mi/h. How far upstream is the boat when it reaches the opposite shore?

    asked by Abdalla A.

  151. Technology Skills class???? Grade 9???

    So I got accept to this Catholic private high school. So we are required to take "Technology Skills". What am I going to learn in this class??????

    asked by Laruen

  152. trig

    If a flywheel 8 ft. in diameter rotates at 80 rpm., what is the linear velocity of a point on the outside edge, in feet per minute in terms of pi?

    asked by Garrett

  153. SCIENCE

    IF SOMEONE WHEIGHS 12 KG ON THE MOON SO HOW MUCH HE WILL WEIGH ON THE EARTH

    asked by armaan

  154. math

    Which two rectangles have an area of 72 square centimeters? A. length 12 cm, width 6 cm B. length 20 cm, width 16 cm C. length 9 cm, width 8 cm D. length 8 cm, width 7 cm

    asked by ellie

  155. AP CALCULUS

    I have my test tomorrow. I am very weak at free response. What kind of question they ask in free response?

    asked by nitali

  156. mathematics

    Write the equation of the line satisfying the given conditions. Passing through ( 9, 7 ) with slope - 3

    asked by Anonymous

  157. mathematics

    Write the equation of the line satisfying the given conditions. Passing through ( 5, 4 ) whose slope is undefined

    asked by Anonymous

  158. Math help please

    2. –3m(m + 8) –3m^2 + 24 –3m^2 – 24m –24m^2 –4m + 5 4. (3x + 4)(x – 2) 3x^2 – 2x – 8 x – 8 3x – 2x – 8 3x^2 + 2x + 8 5. (2y – 1)(4y – 3) –2y + 3 8y^2 – 10y – 3 8y^2 – 10y + 3 8y^2 – 2y + 3 My answers: 2. –3m^2 –

    asked by Delilah

  159. hyperbolas

    Find the equation of the hyperbola that has a center at (8,1), a focus at (3,1), and a vertex at (4,1).

    asked by dylan

  161. Manufacturing process

    Product that using manufacturing process and its process.

    asked by ruby

  162. propability!!!

    A certain professional soccer team runs a 4-4-2 formation on the field. This means they play with 4 defenders, 4 midfielders, 2 forwards, and 1 goalkeeper on the field. If the team has 6 defenders, 5 midfielders, 3 forwards, and 2 goalkeepers, how many

    asked by amgad ahmed

  163. algebra

    a number cube is rolled 2 times in a row. what is the probability of rolling a number greater than 2 both times?

    asked by anon

  164. Math

    What two mixed numbers have the sum 3?

    asked by Anonymous

  165. Sports: Football

    Please help me understand football. Basically, isn't it just tackling, passing, and touchdown?

    asked by Celest

  166. geometry!!! please help me!!!!

    ABC is a triangle with ∠ACB=45∘. D is a point on AC such that AD=2DC. If ∠ADB=60∘, what is the measure (in degrees) of ∠CAB?

    asked by glo

  167. Math

    The surface area of a cylinder is about 218 in^2. What is the surface area of a smaller cylinder that is smaller by a scale factor of 1/2?

    asked by Hunter

  168. math

    Brenda earns $14,260 per year. paid 24 times a year with 1 exemption. If $19.63 in taxes is withheld from each check at what rate is she taxed

    asked by carol

  169. Math

    Evaluate each expression if x=5.07 y=1.5 and z= 0.403 7.3.2x+y 16.224

    asked by Jerald

  170. Life orientation

    Discuss 5 ways in which the human or énvironmental problem impacts.

    asked by Amanda amy roux

  172. Science help please, thanks!

    Can you maybe give me two examples for action-reaction forces? I'm curious. Thanks!

    asked by Gabby

  173. life orientation

    environmental problems impact on the community

    asked by environmental problem impacts on the community

  174. Math

    find the equations of the three perpendicular bisectors of the sides of triangle qrs.

    asked by J.J

  175. writing

    how do you write a coclusion

    asked by joann

  176. life orientation

    what five ways that have an impacts on our ommunities

    asked by samkelo

  177. Math

    What is the barbell method

    asked by David

  178. Life orentation

    Describe the life style disease/behaviour and explain 5(or more) factor that contribute to the disease

    asked by Kamogelo

  179. math

    1. Calculate the interest charge on a $5,000 balance with your current 16.5% annual interest rate. 2. Calculate the interest charge on a $5,000 balance with the Visa Student Card’s annual interest rate of 10.8%.

    asked by Mary

  180. life orientation

    in 10-15 lines critically discuss 5 ways in which the human or enviromental problem impact on the community

    asked by shalati

  181. English II

    Use the text box below to do a five-minute free-writing session. Time yourself. If you would like to try again, give yourself another five minutes. Remember, this is free-writing. You may type whatever you like. This section of your submission will not be

    asked by Carlos

  183. Life orentation

    Describe the life style disease/behaviour and explain 5(or more) factor that contribute to the disease of hiv and aids

    asked by Kamogelo

  184. English

    write sentences using these words: prejudice apartheid thanks :)

    asked by Ryle

  185. Algebra

    Find the coordinates of the vertex and determine whether the graph opens up or down. y=-x^2+x-5

    asked by Sabrina

  186. American History

    Most of the asians who immigrated to the united states in the 1850s came because a.) Of available work b.) Of the rumor of a "golden mountain" in california" c.) they were forceds to flee due to collapes of the japanese economy d.) none of these

    asked by Mac

  187. math

    find derivative of f(x)= log_5((x-4)^3) + e^((x-1)(x+1)) Log_5 means log base 5

    asked by Steve

  188. chemistry

    A sample of an ideal gas has a volume of 2.29 L at 2.90 × 102 K and 1.08 atm. Calculate the pressure when the volume is 1.57 L and the temperature is 302 K.

    asked by Alexis

  189. math

    Ok, so when you are solving an equation, and you have an answer such as 5x=0 , does that mean that it is no solution or all real #s? And, when the answer is 4=4 , does that mean it is no solution or all real #s? And when the answer is 2x=2x, does that mean

    asked by K

  190. English

    k so i tried making one: Sarah had a prejudice against doctors. I think this sentence is too simple, how can i make it better?

    asked by Ryle

  191. Algebra

    It is 74.4 miles from Dwane and Patti's house to Martha's house. Patti leaves home at 10:00 and drives toward Martha's house. Dwane and Martha set off half an hour later from their own houses and drive toward the other's house. The average speed of the

    asked by Need help fast

  192. geometry

    How to get answer for c=2 pie r 4 yards

    asked by shardae

  194. Math (Percentage)

    The price of a hat is reduced by a% from its regular price, and then is raised by a% from the reduced price. If the resulting price is an 81% discount from the regular price, what is a?

    asked by Tom

  195. Math!

    Solve the equation on the interval 0

    asked by Hannah

  196. Math

    An elevator named L in "63 Building" in Seoul is notorious for its low speed. It takes 3 seconds for L just to move one floor. It takes another 20 seconds for it to have its door open and close automatically. What is even more frustrating, is that the

    asked by Bob

  197. Math (Algebra)

    A and B are real numbers such that the two quadratic equations 13x^2 + 3x +2 = 0 and Ax^2 + Bx + 5 = 0 have a common root. What is the value of A+B?

    asked by Shin

  198. Math (Algebra)

    If f(x) is a polynomial with real coefficients such that f(7+5i) = 39 + 13i, then f(7−5i) = a + bi. What is the value of a+b?

    asked by Shin

  199. Math (Algebra)

    If a is a real number and a cubic equation f(x) = x^3 − 8x^2 + (a+12)x − 2a has a repeated root, what is the sum of all the possible values of a?

    asked by Shin

  200. chemistry

    calculate the degree of polymerization of polystyrene with a molecular weight of 3.091e6 gm/mol

    asked by himani.

  201. Math (Algebra)

    For each degree 17 polynomial f with real coefficients, let sf be the number of real roots (counted with multiplicity). Let S be the set of all possible values of sf. What is |S|?

    asked by Shin

  202. trig

    find the minimum and maximum value of sin100 degree plus cos100 degree

    asked by ria

  203. Math (Percentage)

    The price of a hat is reduced by a% from its regular price, and then is raised by a% from the reduced price. If the resulting price is an 81% discount from the regular price, what is a?

    asked by Shin

  205. Math

    Solve the equation simultaneously.1/3x+y =3,x+1/2y=4

    asked by Haleemath

  206. Math (Trigonometry)

    In triangle ABC, we have AB = 16, BC = 29 and CA = √1097. What is the integer that is closest to 100 sin∠ABC?

    asked by Tom

  207. Math (Trigonometry)

    θ is an acute angle such that tan(θ) = 12. What is the value of 5√5⋅(sinθ+cosθ)?

    asked by Tom

  208. Math

    How high is a pole if it casts a shadow 6 meters long when the sun is 30 degrees above the horizon?

    asked by Louise

  209. Hospitality

    A key difference between Social and Corporate event planner work is the days of the week that are usually worked. True or False

    asked by Jake

  210. Hospitality

    A key benefit identified as being part of the Food Service industry that Compass is not having to work nights and weekends regulary. True of False. I say True, becaue when you don't work during nights at food industries?? what do you think

    asked by Jake

  211. physics

    Two trains are moving in opposite diections on parallel tracks and are appoaching a station. Horns on both trains are producing sound of frequency of 500Hz. One train is approaching at 32m/sec. What is the speed of the other train if an observer at the

    asked by reddy22

  212. Hospitality

    According to the Farm to Table speaker's, local Farmer's Market's are a key source of produce and other food products for them weekly True False I say, true because food is what farmers produce?

    asked by Jake

  213. Math

    Joseph is going to see his favorite sports team play and wants to show his team spirit. He has 4 different jerseys and 6 different hats depicting his team. How many different combinations of jerseys and hats does he have to choose from?

    asked by bubbie

  214. ecology

    I have to write an essay about the northern spotted owl habitat, and I have to find at least 3 outside sources, I cannot copy word from word or anything, just paraphrasing and quoting I need some tips on how to put it together and how to start it from

    asked by latisha

  216. gramman

    Why does this pie have less or fewer peaches than the others. Grandmother took my brother and I or me to buy candles

    asked by eileen

  217. Multiplying Decimals

    14.83x16.7

    asked by Jerald

  218. Algebra

    what is the product of 2x and (x2 + 7x -8.

    asked by Gabriella

  219. Math

    Is 72.98 = 72.980 my answer is true.. Is it correct?

    asked by Mike

  220. Math

    11.04x6.18 I know at first I get 8832. Then I drop a zero then get 11040 for my next answer Then Do I add 8832 and 11040 to get my answer?

    asked by Jerald

  221. child care

    A study in 2005 showed that 70% of parents felt that their children were too ______ school, family finances, and divorce.

    asked by Nab

  222. Stats help

    What does the best estimate mean after doing the liner regression equation

    asked by Anonymous

  223. Physics

    The activity of a sample of 35(upper#) 16(lower#)Sulfer (T 1/2= 7.55x10^6 s) is 2.51x10^5 decays per second. WHat is the mass of the sample? m= in grams PLease help me out...Thank you! :)

    asked by Leila

  224. Math

    1. 7x2x2.1=15.12 2. 4.3x8.5=36.55 3. 2.64x1.4=3.696 4. 14.23x8.21=116.8283 5. 5.01x11.6=58.116 6. 9.001x4.2 37.8042

    asked by Jerald

  225. Physic

    A steel bar of length L=2 m, with modulus E=200 GPa and constant cross sectional area A=200 mm2 is constrained between two walls at its two ends A and B. A distributed axial load, fx(x)=−p0(1−3x2L), with p0=200 kN/m, is applied to the bar only in the

    asked by Time
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