Questions Asked on
March 28, 2017

  1. Algebra

    An amplifier has a 50 watt output and a 5 watt input. What is the gain in decibels for this amplifier, rounded to the nearest decibel?

    asked by Anonymous
  2. physics

    Driving in your car with a constant speed of v= 22 m/s, you encounter a bump in the road that has a circular cross-section, as indicated in the figure (Figure 1) . Part A If the radius of curvature of the bump is 52 m, find the apparent weight of a 66-kg

    asked by alex
  3. Math 120

    You are dealt one card from a​ 52-card deck. Find the probability that you are not dealt an ace.

    asked by Beth
  4. Math ASAP

    Which number is irrational A. 3/17 B. 25/ C. 0.6 D. 33/

    asked by Savanna Reed
  5. hi

    Fourteen soccer players want to share nine protein bars after the game. What fraction of a protein bar will each player get?

    asked by Anonymous
  6. chemistry

    How many grams of NaHCO3 should be added to one liter of 0.100 M H2CO3 (Ka = 4.2 x 10-7) to prepare a buffer with pH = 7.00? I got molefrom.100/1L equal .100mole. where do I go from here?

    asked by KO
  7. Math- Graphing (check answer)

    Determine which ordered pair is a solution of y= -5x + 10. A. (-15,5) B. (2,0) C. (-1, -5) D. (3, 25) My answer is A. Am I correct?

    asked by
  8. math - algebra

    write (1/81)^(1/4) in radical form

    asked by anonymous
  9. math

    240 people attended a for adults were R60 and for children R40. The concert raied R12800. How many adults and how many children attended???

    asked by Anonymous
  10. Math

    During an epidemic, the number of people who have never had the disease and who are not immune (they are susceptible) decreases exponentially according to the function where t is time in days. f(t)=15,000e^-.05t Determine how long it will take for the

    asked by Aria

    Two springs, with force constants k1=175N/m and k2=270N/m, are connected in series, as shown in (Figure 1) . Part A: When a mass m=0.50kg is attached to the springs, what is the amount of stretch, x? k1 I k2 I m ? ] x

    asked by ANA
  12. calculus

    The path of a baseball relative to the ground can be modelled by the function f(t)=−t^2+8t+1, where d(t) represents the height of the ball in metres, and t represents time in seconds. What is the speed of the ball when it hits the ground?

    asked by judah

    A 2.0kg block of wood starts at rest and slides down a ramp. Its initial height is 12.0m. If the final velocity of the block is 13m/s, determine the energy of this system that has been turned into heat.

    asked by Student12
  14. chemistry

    Give the IUPAC name of thish hydrocarbon ch3ch2c(ch3)2ch2ch2ch2ch3

    asked by Elijah
  15. Designing Specialty Areas

    The book discusses "creating a sense of place." Amelia, a teacher who lives near Lake Erie, wishes to implement this concept. Which of the following playground structures would help her achieve this goal? A. A rowboat for pretend play B. A wooden

    asked by Priscila
  16. Chemistry

    A 152 g sample of ice at –37 degree C is heated until it turns into liquid water at 0 degree C. How do you find the change in heat content in the system? I've found H(I) [Change in heat of the ice] to be 11416.72 but im still stuck on the change of heat

    asked by Safld
  17. Algebra

    A rectangle's width is 6 inches less than its length. If it's area is 216 square inches find the dimensions of the rectangle. Write an equation and solve

    asked by Kevin
  18. Physics

    A uniform meter rule is balanced at the 30cm mark when a load of0.8 newtons is hung at the zero mark .at which point is the center of gravity.

    asked by Johnnathon
  19. physics help

    At a playground, a 20-kg child sits on a spinning merry-go-round, as shown from above in (Figure 1) . The merry-go-round completes one revolution every 6.2 s, and the child sits at a radius of r=1.8m. a) What is the force of static friction acting on the

    asked by anonymous
  20. Math Answer Check

    2.on which of the following lines does the point (7, 1) lie A. y - 5x = 4 B.y = x - 10 C. y=-4x + 3 D. y= -x + 8 Is it B? 3.Find the slope of the line through (-9, -10) & (-2, -5) A -5/7 B 7/5 C 5/7 D -7/5 Is it D? 10. The equation t=0.07c represents tax,

    asked by
  21. biology

    HELP PLEASE!!!! How does the outcome of a chemical reaction that absorbs energy differ from one that releases energy?

    asked by ray
  22. MATH

    Evian's average no five tests were 90%. The average of the four highest test scores was 93%, and the average of the four lowest test scores was 87.75$. What was the sum of the lowest mark and the highest mark?

    asked by HELP NOW PLEASE
  23. College Math

    Michael is a software salesman. Let y represent his total pay (in dollars). Let x represent the number of copies of History is Fun he sells. Suppose that x and y are related by the equation 1700+90x=y .

    asked by Michelle
  24. geomoetyr

    Given: LM || KN , KL || NM , LP = h­1 = 5 cm, MQ = h2 = 6 cm, PKLMN = 42 cm Find: Area of KLMN.

    asked by alec taitano
  25. Mat222

    Suppose that the functions S and T are define for all real numbers x as follow. s(x)=x-3 t(x)=3x+1 Write the expressions for (s-t)(x)and (s.t)(x) and evaluate (s+t(-2)

    asked by Samantha
  26. Social studies

    How are capital resources used in production? A:They allow producers better access to world markets B:They make it possible to employ more skilled labor C:They provide tools that make production more efficient D:They purchase raw materials needed for

    asked by Sunny Dreams <3
  27. chemistry

    the half time of a radioisotope is found to be 4.55 minutes. if the decay follow first order kinetics. what percentage of isotope will remain after 2.00 hours?

    asked by Linda Nnenna
  28. Algebra

    30 is the product of Chrissy's height and 2.

    asked by Michelle
  29. Biology

    A 2n cell has 23 pairs of chromosomes. At the end of Meiosis 1, how many individual chromosomes will each daughter cell have? ____ IS it 46?

    asked by lilly
  30. math

    Find the slope of the line through (-9,-10) and (-2,-5) A. -5/7*** B. 7/5 C. 5/7 D. -7/5

    asked by Sally
  31. Math

    Write an addition equation must have one two and a three digit addend and use all of these digits 662-228-8000

    asked by Melissa
  32. chemistry

    What type of chemical reaction is this equation? CuO (s) + [2H+ + SO4 2-](aq) [Cu2+ + SO4 2-] (aq) + H2O (l)

    asked by Anonymous
  33. definitions

    define anti-urban define urban transformations DO NOT link me to any sites thanks

    asked by lila
  34. Math

    In a state legislature there were 119 more members in the House of Representatives than in senate. If there were m members in senate, write an expression to represent the totial members in the state legislature. PLZ HELP!!!!!

    asked by Liza
  35. Algebra

    Please help! Give the square and the cube of each expression in simplified form. -2t^2k

    asked by Nina
  36. Math

    You rent x pairs of shoes for $2 each. You buy the same number of drinks for $1.50 each. You also pay $9 for a bowling lane. Write an expression in simplest form.

    asked by Nina
  37. Math

    2. Estimate the radius of a circle with the circumference of 272.2 inches. Use 3.14 for pi. Round to the nearest tenth. a. 43.3 b. 136.1 c. (86.7) d. 5,887.2

    asked by Help I need somebody not just anybody
  38. Chemistry

    a group of grade three students, along with their science teacher, were outside the classroom observing plant species. upon observation, the students recognized that some plant leaves were very pale yellow and weak looking while some looked healthy.

    asked by riohni
  39. Math

    Solve the missing variable e^(x+6)+5=1

    asked by Aria
  40. algebra

    A copper conductor 130metrrs long hasa resistance of 4.30ohms. If the resistivity of a copper is 1.42*10ohms determine the cross sectional area of the conductor in mmsquared

    asked by sai
  41. physics

    A 2.51 kg particle moves in the xy plane with a velocity of v = ( 4.98 , -3.58 ) m/s. Determine the angular momentum of the particle about the origin when its position vector is r = ( 1.73 , 1.15 ) m.

    asked by matt
  42. physics

    A playground merry-go-round of radius R = 1.1 m has a moment of inertia of I = 280 kg*m^2. and is rotating at a rate of ω = 9 rev/min around a frictionless vertical axis. Facing the axle, a 37 kg child hops onto the merry-go-round and manages to sit down

    asked by matt
  43. Physics

    A billiard ball 0.62 kg moving at 8.2 m/a elastically strikes a bowling ball, 3.2 kg moving in opposite direction at 1.2 m/s Calculate final velocities The kinetic energy before the collision The kinetic energy after the collision

    asked by Jen
  44. Math - calculus

    Suppose f(x)=x^p where p>1 and [a,b]=[0,1]. According to the Mean Value Theorem there is at least one number c such that f(b)−f(a)=f′(c)(b−a). In this particular case the number c is unique but it depends on p. c=____ Your answer will be in terms of

    asked by Anonymous
  45. chemistry

    Use the table of complex ion formation constants to calculate the molar concentration of free Fe^2+ in 0.510M aqueous solution of potassium hexacyanoferrate(II) K4(Fe(CN)6) at 25 degrees celsius. I know the answer is 1.96*10^-6 m, but I'm at a loss on how

    asked by Jacob
  46. Mathematics

    Which shapes could this pentagon be decomposed into to find its area? Choose all that Apply. A) Three Triangles * B) Two Trapezoids C) Five Triangles ** D) One triangle and One Trapezoid *** (My answers are A,C and D).

    asked by @AmeliaTheGamer
  47. Math

    Graph the two functions below, determine if they wre inverses based off the graph. Explain f(x)=x^2-3,g(x)=square root x+3

    asked by Pam
  48. Math

    I have to estimate the area of a circle and use 22/7. The diameter of the circle is 28 cm.

    asked by Help I need somebody not just anybody
  49. chemistry

    How do you rationalize an infrared spectrum of salicylic acid and aspirin? How do you know which is which?

    asked by Nicole
  50. Social Studies

    The Ottoman empire... only allowed Islam. persecuted Christians.

    asked by Someone who needs help
  51. Calculus

    Harold is in an airplane that is flying at a constant height of 4505 feet away from a fixed observation point. Maude, whose eyes are 5 feet from the ground, is standing at this point and watching the plane; the angle between her line of sight (the line

    asked by Anonymous11
  52. Math/Algebra

    Explain the composition of an algebraic expression, 3 sentences, an example

    asked by Nina
  53. Trigonometric Identities

    Triangle ABC is given where angle A=33 degrees, a=15 in., and the height, h, is 9 in. How many distinct triangle can be made with the given measurements. Please explain your answer

    asked by Shannon
  54. differential equation

    i need help understanding this question? can some one tell me what exactly i have to do in it 7. Suppose a student carrying a flu virus returns to an isolated college campus of 1000 students. Determine a differential equation for the number of people x(t)

    asked by javeria
  55. History/American Government

    Find one difference between the Arizona state constitution and the US Constitution. Explain why you think this difference occurred.

    asked by bean
  56. social studies

    what is a corporate farm? its part of a short answer and i cant find a definition that is easy for me to understand.

    asked by Natasha
  57. Physics

    3 particles of masses m1 = 1.5 kg , m2 = 2.5 kg and m3 = 3.5 kg form an equilateral triangle of edge length l= 135 cm. Determine the center of mass of the system.

    asked by Happinessdelight
  58. maths

    a spinner is split into 3, red blue and yellow. you need to land on blue in the next 2 goes to win, what is the probability of losing?

    asked by carol

    equation in graphing form: f(x)=(x+3)^2+2 original equation: f(x)=x^2+6x+ 11 state the vertex??

    asked by person
  60. Math

    A book on Tameka's shelf weighs 3 (pounds). How many ounces does the book weigh?

    asked by Tasleem
  61. Math

    a school bus has 1000 students. on wednesday, 300 students went on a field trip. what percent the students did not go on the field trip.

    asked by tazzy
  62. Physics

    Determine the amount of work required for each of the following: a) to lower a 35kg sack of rice through a height of 3.5m b) to carry the 30kg sack of rice 10m along a corridor c)to crave the sack of rice 15m along the corridor at a constant velocity

    asked by Amy
  63. word problem

    In 1994 the moose population in a park was measured to be 6400. By 1996, the population was measured again to be 6800. If the population continues to change linearly: Find an equation for the moose population, y,in terms of x, the years since 1994. Ive

    asked by Carlos
  64. 6 grade math

    Middle School Mathematics How can I write a question In words that could be answered using expression for each and a diagram. 3/4 ÷ 1/2 and vise versa 1/2 ÷ 3/4 OK so I found a sample but I just can't think how would I write it out for my problems.

    asked by Jessica
  65. maths

    write down the first four terms of the following expansion (1+x)^1/4 stating in each case, the values of x for which the expansions are valid

    asked by johnkings
  66. science discussion

    What evidence is there that the human species has been successful so far? Explain. What environmental pressures in the past do you think were most important in shaping the human species as it exists today? What environmental pressures exist now that you

    asked by kk
  67. maths


    asked by mulai
  68. Math

    In an isosceles triangle,the shorter side is 20% shorter than the long sides.the perimeter is 15.4cm. how long is the shorter side?

    asked by Abe
  69. Math

    A college football coach wants to know if there is a correlation between his players' leg strength and the speed at which they can sprint 40 yards. He sets up the following test and records the data: Every day for a week, he counts how many times each

    asked by Anon
  70. algebra

    Isaac was 51cm when he was born. When he was 10, he had grown in length by 174% how tall was he?

    asked by Abe
  71. Algebra

    I need help with these Algebra problems in which I need to give the square and the cube of each expression in simplified form. 1. -2t^2k 2. 3rs^4 3. 5m^3n 4. -4x^2y^2

    asked by Drew
  72. Math

    A speed camera recorded 1637 speeders in six months. This represented 3÷1000 of all the cars that passed off the camera. How many cars passed the speed camera per day on average?

    asked by Abe
  73. Geography

    What was the goal of the philosophes? Did their movement have an impact on our lives today?

    asked by LUIS PORTILLO
  74. Chemistry

    Neutralization of water containing H2SO4 and HNO3 with CaSO3. What is the pH in water if the volume is 1000 liter and the concentration of H2SO4 is 0,0013 M and concentration of H2SO4 is 0,0010 M ? And how much of CaCO3 is needed for neutralization of the

    asked by Chemistry
  75. MATH

    Jenny agreed to work for a year for $9000 plus a motorcycle. At the end of 5 months, she left the job and received $250 plus the motorcycle for her pay. What was the value of the motorcycle?

    asked by HELP NOW PLEASE
  76. physics

    a) a driver of mass 55kg needs to jump to a height of 1.1m above her take off height, at which point her speed needs to be 0.5m/s^. How fast just she be travelling the instant her feet leave the diving board? So we know eg=mgh =9.8*55*1.1 I assumed we're

    asked by alex
  77. Alex

    Express x^3-4/x^2(x+2) into partial fractions

    asked by Cooper
  78. Math

    A school has 1200 pupils of 3/4 of the pupils travel to school by bus how many of the pupils travel to school by bus

    asked by Seungbae Kim
  79. Percentage

    If Safia have 10 percent more cookies than Rohit, how many percent fewer cookies does Rohit have than Safia?

    asked by Sara
  80. Algerba

    Solve for x. Round answers to the thousandths place. 3^x=17 5.667 2.579

    asked by Jass
  81. Math

    30 red socks, 22 gold socks and 14 black socks. How many socks would he have to pick up before getting a matching pair?

    asked by Khalifa
  82. stats

    The Information Systems Audit and Control Association surveyed office workers to learn about the anticipated usage of office computers for personal holiday shopping (USA Today, November 11, 2009). Assume that the number of hours a worker spends doing

    asked by paige
  83. Maths

    The difference between the digits of a two digit number is 1.The number itself is 1 more than 5 times the sum of its digits.If the units digits is greater than the tens digit,find the number.

    asked by Rilwan
  84. Algebra

    A triangle has a height that is 4 inches less than its base. If the triangle has an area of 86 square inches, set up and resolve an equation to find its base and height.

    asked by Kevin
  85. math

    A rectangular closet is three feet longer than twice the width. The area of the closet is 65 square feet. Find the perimeter of the closet.

    asked by jack
  86. Math

    nine kids and two adults are going to the circus. kids tickets are on sale for only half the price of adult tickets. the total cost was $72. how much is one kids ticket. how much is one adult ticket

    asked by Drake
  87. Science

    For an experiment, you place 15 g of ice with a temperature of -10 degrees C into a cup and label it A. You also place 25 g of ice at the same temperature into another cup and label it B. Which of the following statements is true? A. The average kinetic

    asked by Not Tellin' Ya Ma Name
  88. Math

    Anna is buying 2/5 of a pound of beans for dinner . Mercy is buying 7/4the amount of beans that Anna is buying how many pounds of beans is mercy buying

    asked by Anonymous
  89. math

    what is -3.5 + 17? The online calculator says 13.5 and I don't get how that is the answer. I got 14.5 and I am confused. Please help me and explain this to me

    asked by Anonymous
  90. science

    How are suspensions and solutions similar? How are they different? (can use a Venn diagram) I do not understand how these are similar.

    asked by Sophia
  91. English

    1. I want to buy a plain bag. (What is a plain bag? Does it mean a bag without patterns?)

    asked by rfvv
  92. Biology

    The p53 enzyme system prevents progression to which stage of the cell cycle? choices are: 1. G1 2.Cytokineses 3.S phase 4. Mitosis 5. G2 * I think it's S phase, It's not G1 right?

    asked by sarah
  93. science

    DNA is synthesized during which of the following stages of the cell cycle? Choose all that apply A.mitosis B.G2 C.S D.G1 E.interphase F. cytokineses I answered with A,C,E am I missing one? I am pretty sure I am

    asked by marie
  94. bio

    Haploid (1n) cells are produced at the end of ___.CHOOSE ALL THAT APPLY A. meiosis 2 B.mitosis C.meiosis D.meiosis 1 I picked A, and D Am I missing one? I think I am

    asked by gaia
  95. english

    If you are very good with people, you have a high level of __________ intelligence.

    asked by Adrianna
  96. Trig Identities

    secx - sinxtanx

    asked by sarah
  97. calculus

    y' = 2y(1/2) , y(0) = 8 The function starts with y0 = 4 ,what is Euler’s method for computing yk+1 from yk with step size ∆t.

    asked by melina
  98. Geometry

    Express answer in exact form. Find the area of the larger segment whose chord is 8" long in a circle with an 8" radius. (Hint: A chord divides a circle into two segments. In problem 1, you found the area of the smaller segment.) I've no idea how to do

    asked by Jessica
  99. Physics

    Using Coulomb's law to solve: Charge A is +2.0x10^-6C and charge B is +3.0x10^-6C. The two changes are 3 m apart. What is the force between them?Is the force attractive or repulsive? Okay so here's what I have so far (2.0x10^-6)(3.0x10^-6)/(3)^2 It is

    asked by ANONYMOUS
  100. Geometry

    What is the scale factor of the area 78in2/128in2? I know area is a2/b2. Now I took the square root and would that be my answer? Can you please do the square root because I get a looooong decimal. Thank you!

    asked by Karen Shek
  101. Calculus

    The point on the parabola y=x^2 that is closest to the point (2,1/2) is (___,___). The distance between the two points is _______.

    asked by Jaime
  102. math

    if m

    asked by Sunny Dreams <3
  103. Math

    When drawing box and whisker plots, how do you know when you no longer need to draw the whiskers? For instance, in the following data points: 3,42,45,55,56,58,and 84, you do not need whiskers. However, in the data points: 12,35,37,41,53,58,59,91, you do

    asked by Elizabeth
  104. Science

    anatomical differences of humans What possibilities and/or dangers does this difference imply for humans from other animals? Use the arms and hands

    asked by Keon Meadowsawdos
  105. gerund phrases

    1. identify the gerund phrase(s) 1.Setting turquoise stones in silver is a common jewelry-making practice. setting turquoise stones

    asked by plz check answers
  106. calculus

    in your own words, describe how limits can be used to find the instantaneous rate of change of a function.

    asked by judah
  107. Pre-Cal/Trigonometry

    Triangle ABC is given where angle A=64 degrees, a=16 in., and the height, h, is 15.3 in. How many distinct triangles can be made with the given measurements? Please explain your answer to your best ability

    asked by Emily
  108. History

    What weapon/technology would be the most beneficial during WW1? Trench warfare, machine guns, field guns, rifles, poison gas, flame thrower, aircraft, tanks, U-boats, or battleships? I'm not sure but I eliminated trench warfare, flame throwers, aircraft,

    asked by Anonymous
  109. Algebra 2

    What is the intersection of a cone and a plane parallel to a line along the side of the cone? Provide mathematical examples to support your opinions. You may use equations, diagrams, or graphs to organize and present your thoughts. You are encouraged to

    asked by Fading
  110. social studies homework

    3. What happened as a result of a meeting between A. Phillip Randolph and Franklin Roosevelt? (l point) I truly have no idea what this answer could be, I looked all through the lesson and found nothing. Can someone either help me by steering me in the

    asked by mali
  111. Algebra

    Find the zeros of the function f(x)=(m^2-9)(9m^2+24m+16)

    asked by Kevin
  112. Math

    In a state legislature there were 119 more members in the House of Representatives than in senate. If there were m members in senate, write an expression to represent the totial members in the state legislature. PLZ HELP!!!!!

    asked by Elle