Questions Asked on
February 20, 2020

  1. mathematics

    a car petrol tank in 0.8m long 25cm wide and 20cm deep.how many litres of petrol can it hold?

  2. social studies

    What did Jesus teach were the most important commandments? Select the two correct answers.

  3. math

    a boy is 20m away from a tree, and he observes that the angle of elevation of a bird on the tree is 58°. He is 1.7m tall. How high is the tree?

  4. Chemistry

    How can you balance Cu+HNo3=Cu+(No3)2+No+H2o by using algebric or a b c d method please show me with full workout

  5. chem

    Find the ΔHr0 for the reaction: Na2CO3(s) +2HNO3(aq) → 2NaNO3(s) +CO2(g) +H2O(l) ΔHr0=+125.7kJ ΔHr0=-67.2kJ ΔHr0=-45.3kJ ΔHr0=-140.0kJ ΔHr0=+105.8kJ

  6. calculus

    Find the volume of the solid obtained when the region under the curve y = 9 arcsin(x), x ≥ 0, is rotated about the y-axis. (Use the Table of Integrals.)

  7. Science

    A scientist crossed a white flower with a red flower.He expected some offspring to be white and others to be red.Instead,many offspring were pink.What occurred and how can you tell?

  8. Chemistry

    Given the following equation : 2Al+6HCl 2AlCl 3 +3H 2 If 3.00 grams of H 2 were produced, how many grams of Al reacted ? (Molar mass of Al = 26.98g / (mol) , molar mass of H 2 = 2.016 g/mol)

  9. algebra 2

    graph y=2x+3 and its inverse.

  10. Algebra

    2x+6y=-12 2x-5y=10

  11. science

    Select the correct answer. This map shows the population density for different regions of the world. If this trend continues, what is one likely effect in the regions with the darkest shading?

  12. Math

    a table has a circular top that has a diameter of 12 feet. Which measurement is closest to the circumference of the tabletop in feet?

  13. physics

    From the average separation between air molecules at STP, and their mean speed, estimate how long it would take one molecule to move into the region occupied by another. Assume that air consists mainly of nitrogen molecules. how do i do this question? so

  14. Math

    Prove or provide a counterexample: For all sets A, B, C, if A is subset of B and B is a subset of C^c (complement of C), then A intersection C= { }.

  15. English

    In what ways is the use of imagery in the two poems similar?

  16. History

    describe at least two challenges freedmen face immediately after the civil war explain the role of the freedmen's bureau and if you believe if it was successful or not pls help I don't know

  17. Language arts

    I need help for the questions on voices in verse

  18. Math

    Find the volume of a sphere with a radius of 6 ft. Round your answer to the nearest whole number. A.151ft^3 B.678 ft^3 C.904 ft^3 D.2,713 ft^3

  19. Math

    Use the graph below to answer the question that follows> Which statement describes the speed of the remote-control car over time? A-the speed of the car decreases from 4mi/h to 2mi/h in the first 3 seconds, increase to five mi/h in the next 2 seconds, and

  20. math

    Find the value of "a" such that the function x^2 x

  21. math

    Let f(x) = (2)sqrt(x). If f(c)=f'(c) find the value of c

  22. math

    Find the equation of each tangent line to the curve y=(1/x) that has a slope of -1. Find each point of tangency.

  23. Math

    #2: Use a proof by contradiction to prove: For all sets A, B, C, D if A intersection C= { }, then (A x B) intersection (C x D) = { }.

  24. Math

    Call a relation R “orbital” if xRy and yRz imply zRx. Prove that R is an equivalence relation if and only R is both reflexive and orbital. (Note that this is an “if and only if” statement, which is bi-conditional. So there are actually two

  25. math

    Identify any outliers in the following data set by first calculating the median and the interquartile range. Number of texts sent Frequency Cumulative Frequency 0 10 10 1 8 18 0 5 23 0 3 26 0 1 27 Median I got was 14 (27/2 = 13.5 rounded up to 14) = score

  26. math

    If one angle in a parallelogram is twice the measure of the consecutive angle, what are the measures of the angles? Please help immediately!!! :(

  27. Physics

    A man drove his car north west for a distance of 10km,then east for 40km and then south for 60km.Calculate the overall displacement and direction of the car from the starting point.

  28. Calculus

    For what values of x does the graph of the function y=4x^3+14x^2-2x-3 lie above the function y=2x^2-x?

  29. Math

    5(4x+7) - 2 x = ___ x +21 A.-20 B.20 C.18 D.-18

  30. Math

    How can I find the area of a half circle thats on top on a square with both sides being 4 inches?

  31. Physics

    A source consists of three charged particles located at the vertices of a square (see figure below), where the square has sides of length 0.213 m. The charges are q1 = 33.0 nC, q2 = −64.0 nC, and q3 = 54.5 nC. Find the electric potential at point A

  32. Math

    How would we go about deriving an equation which would tell us how far the maximum distance a child would travel if they jumped of a swing? Should I start with the two differential equations for maximum range for a projectile and also a shm of a pendulum

  33. Civics

    Identity some of the limitations of fundamental human rights

  34. Religion

    What role did jezebel play in the death of naboth,and what impression does her role create of her

  35. Physics

    2 bodies a&b of m 4kg 2kg move towards it other with v of 3m/s and 2m/s respectively and collide

  36. math

    kylie makes a trail mix by mixing nuts and raisins in the ratio 7:3 . she has 84 nuts and 60 raisins . how much trail mix can she make?

  37. Physics

    Copper has p= 1.7×10^-8ohm(m), what is the resistance of 20m of copper with a cross sectional radius of 0.005

  38. Stats

    Got an A given they were female

  39. Science

    Primary succession occurs when a pioneer species moves into an area that has no plants. Which organisms are common pioneer species? A. Conifer trees and tall grasses with roots that loosen the soil B. Mosses and lichens that can grow on rocky surfaces C

  40. Math

    #1: Prove or provide a counterexample: For all sets A, B, C, if A is subset of B and B is a subset of C^c (complement of C), then AC= { }. This is my proof so far, but I don't know if it is correct? Assume to the contrary that A ⋂ C = { }. This means

  41. English

    How do poetic elements increase your interest or appreciation for the story for "The Highwayman"

  42. Math

    #2: Use a proof by contradiction to prove: For all sets A, B, C, D if A intersection C= { }, then (A x B) intersection (C x D) = { }. This is my proof so far, but I don't know how to solve it fully. Assume that (A x B) ⋂ (C x D) = { }. Then (m, n) ∈ (A

  43. Math

    Call a relation R “orbital” if xRy and yRz imply zRx. Prove that R is an equivalence relation if and only R is both reflexive and orbital. (Note that this is an “if and only if” statement, which is bi-conditional. So there are actually two

  44. Math

    #1: Prove or provide a counterexample: For all sets A, B, C, if A is subset of B and B is a subset of C^c (complement of C), then AC= { }. This is my proof so far, but I don't know if it is correct? Assume to the contrary that A ⋂ C = { }. This means

  45. science

    Name 6 types of simple machines that make work easier AND an example of each 1._____ 2._____ 3._____ 4._____ 5._____ 6._____

  46. Trig

    Whatat other phenomena can be modeled using sinusoidal functions?

  47. Math

    1: if m angle sign 1=37°,nwhat is m angle sign 4? 53°mymanswer 43° 37° 27° 2: if m angle sign 1=50°, what is m angle sign 5 50° my answer 40° 35° 25° 3: if m angle sign 4=25°, then what is m angle sign 8? 105° 75° my answer 175° 25° And if

  48. algebra

    solve by factoring (i know they are are divisible by 14, but I'm stuck) Thank you 210x^3 + 266x^2 + 14x - 42 = 0

  49. algebra

    solve the polynomial by factoring (I know i can factor out 3x^3, but again idk what to do after that) thanks a bunch! -12x^5 -15x^4 + 21x^3=0

  50. Grammar

    The woman in the brown coat is ____. a) She b) Her

  51. algebra

    Which of the following lists all of the roots of X^5 - 3x^4 + 3x^3 - x^2 =0 Why is the answer ( 0, 1) your answer was this: x^5 - 3x^4 + 3x^3 - x^2 = x^2(x^3-3x^2+3x-1) = x^2(x-1)^3 but i dont get the last part..(= x^2(x-1)^3)

  52. physics

    In Fig. 10.20, the steel ring of diameter 2.5 cm is 0.10 mm smaller in diameter than the steel ball at 20° C. (a) For the ball to go through the ring, should you heat (1) the ring, (2) the ball, or (3) both? Why? (b) What is the minimum required

  53. geomertry

    Prove that A(–2, 0), B(0, 9), and C(2, 0) and D(0, –9) are the vertices of a parallelogram. A. What are the properties of a parallelogram involving slope? B. What must we KNOW (regarding slopes and sides) to confirm the shape is a parallelogram? C. Do

  54. English

    Which line from "Miracles" contains an image that primarily appeals to the sense of touch?

  55. Social studies

    In which of the following areas is there a large concentration of American Indian and first Nations people

  56. algebra

    solve the polynomial equation by finding all real roots thanks again x^3 + 6x^2 + 9x + 2 = 0

  57. Social studies

    Describe the effects of cultural diffusion in Southwest Asia. Explain what cultural diffusion is, and then tell how different groups have reacted to modern ideas in different ways.

  58. Math

    1. Find the volume of the given pyramid A.147 yd^3 B.175 yd^3 C.221 yd^3 D.441 yd^3 2. Find the volume of a square pyramid with a base of 9 cm and a height of 4 cm A.324 cm^3 B.108 cm^3 C.36 cm^3 D.152 cm^3 3. Find the volume of the given cone A.320 in^3

  59. math

    -1/y^-4

  60. Math

    CLICK HERE |!!!!PLEASE HELP WITH THISS!!!. Lesson 9: Exponents and Exponential Functions Unit Test CE 2015 Algebra 1 B Unit 2: Exponents and Exponential Functions 1.-(6)^-1 6 1/6 -1/6 -6 2. (-8.3)^0 1 -1 0 -8.3 3. -1/a^-2 -a^2 -2/a -2a a^2 4. 4^6 times 4^3

  61. physics

    Consider the final arrangement of charged particles shown in the figure below. What is the work necessary to build such an arrangement of particles, assuming they were originally very far from one another? (Let q1 = 6.5 nC,q2 = 3.0 nC and q3 = −17.0 nC.)

  62. Math

    Use the graph below to answer the question that follows> Which statement describes the speed of the remote-control car over time? A-the speed of the car decreases from 4mi/h to 2mi/h in the first 3 seconds, increase to five mi/h in the next 2 seconds, and

  63. algebra

    Does the table represent an exponential function? x: 1 2 3 4 y: 3 9 27 81 a)no b)yes

  64. Math, Statistics

    In a genetics experiment on peas, one sample of offspring contained 435 green peas and 170 yellow peas Based on those results estimate the probability of getting offspring pea that is green is. the result reasonably close to the value of 3/4 that was

  65. algebra

    {d+e=2d−e=4

  66. English

    ms sue is this a good argumentative essay? ------------------------------- Is there too much homework assigned? Some people in my school are discussing if there is too much homework each day. Should there be less homework, or more homework? I think there

  67. Math

    C -7_> 12 but the > is over the _

  68. biology

    list and explain the 5 functions of proteins?

  69. biology

    list and explain 5 functions of proteins?

  70. Math

    Friendship’s soccer team purchased uniform and equipment for a total cost of $912.

  71. Math

    choose all decimals that are equivalent to (7×100)+(5×1)+(8×1/10)+(1×1/100) 75.081 705.810 705.801 75.810 705.81 705.081

  72. Math

    I'm wondering if someone has answers for pre algebra on formulas?

  73. maths

    The quality y is partly constant and partly veries inversely as the square of x.When y=23/4, x=4 and y=8, x=2.Find the value of x when y=17.

  74. Math

    what is the value of e 17° ** 48° 136° 360° it basically looks like an x and at the top it says 132 degrees on the left side it says e on the right it says c and the bottom says b-----sorry I cant put a picture in...

  75. Math

    Please help me to choose all decimals that are equivalent to (7×100)+(5×1)+(8×1/10)+(1×1/100) 75.081 705.810- yes 705.801- ? 75.810 705.81- yes 705.081-? I'm not sure enough if 705.81 and 705.081 have to be choosen too.

  76. Social Studies

    1. The United States fought in World War II to defeat dictators and preserve democracy. In this fight to defend democracy, however, the United States denied democracy to some of its own citizens. Describe how it happened and who was denied rights.

  77. History

    What was the goal of the lend-lease act.

  78. Social studies

    1.Which of the following social concerns did the 1885 school attendance law most clearly help? A. Temperance B. Prohibition C. Child labor D. Immigration

  79. History

    which event led to united states involvement in world war 2 A. the Japanese attacked pearl harbor B. the axis powers waged war C. the allies invaded Normandy D. U.S allies were being attacked

  80. math

    If you flip a coin 12 times, what is the best prediction possible for the number of times it will land on heads?

  81. social studies

    in what order does a dynasty gain or loose power in the mandate of heaven mandate of heaven lost by the dynasty a new dynasty rises a new dynasty rules the dynasty grows weak i think- a new dynasty rises a new dynasty tules the dynasty grows weak mandate

  82. History

    which of the following was part of U.S. preparations for war A. enacting the draft B. maintaining neutrality C. the lend lease act D. the normandy invasion

  83. Health

    Are there particular hygiene/cleanliness choices being made by the teens in your chosen magazine? I am not sure what to answer for this question, can anyone help? I need an example from any Seventeen magazine.

  84. algebra

    Astronomers measure large distances in light-years. One light-year is the distance that light can travel in one year, or approximately 5.88 x 1012 miles. Suppose a star is 3.2 x 102 light-years from Earth. In scientific notation, approximately how many

  85. maths

    A rectangular prism has a length of 8 inches, a width of 5 inches, and a height of 2 inches. What is the volume of the prism? A. 15in2 B. 40in2 C. 80in2 D. 132in2 URGENT!!!!!!!!!!!!!!!!

  86. Math

    2.Which of the following ratios is equivalent to 15/20? A.200 to 150

  87. Science

    The map below shows four volcanic islands in the Caribbean Sea. What do these volcanic islands tell you about the plate interaction that is occurring to form these islands? Group of answer choices The volcanoes form an island arc, indicating a continental

  88. math

    Kevin is mixing a wild bird feed . He needs to use seeds a , b , c in the ratio 3:5:1 by weight. Kevin needs to make 360g of the seed mix. He has 150 g of seeds A , 205 g of seeds B and 30 g of seed C. does he have enough seeds

  89. Physics

    Two small metallic spheres, each of mass 0.11 g are suspended as pendulums by light strings from a common point as shown. The spheres are given the same electric charge, and it is found that the two come to equilibrium when each string is at an angle of

  90. History

    Which of the following is the most likely reason that so many people turned to the Catholic Church during the Middle Ages?

  91. algebra

    identify the number of zeros ....thank you 2x^4-250x=0

  92. Math

    Lester deposited $400 into a savings account earning 4.5% simple interest and 450 into an investment account earning 3.2% interest compound annually. What was the total interest he earned in 3 years for both accounts?

  93. Physics

    A 9.00-nC charged particle is at point B in a uniform electric field with a magnitude of 975 N/C (see figure below). What is the change in electric potential experienced by the charge if it is moved from B to A along the following paths? (Consider that l =

  94. math

    In December, Carlos called within Canada, to the United States, and to Mexico. The charges are $0.28/min within Canada, $0.30/min to the U.S., and $0.84/min to Mexico if the following conditions applied. His total bill for the month was $90.96. He talked

  95. Calculus

    What are two solutions of cosx=2/3 between 0 ad 2pi?

  96. algebra

    oobleck thank you for trying to help me, but I don't get this (algebra) at all. It really is like Chinese to me. I have been studying using your help for hours and hours and I am so lost! When I ask the teacher she explains it the same way every time. I

  97. Pre-Algebra

    calculate the slant height for the given cone. Round to the nearest tenth. diameter=8cm height=9cm A-10.2 B-11.4 C-9.8 D-12.0 can someone plz help?

  98. science

    One of the most important factors in determining the rate of weathering _____.

  99. Math

    A certain virus infects one in every 300 people. A test used to detect the virus in a person is positive 80% of the time if the person has the virus and 5% of the time if the person does not have the virus.

  100. Math

    So I've been having trouble with things like mean median mode and range. Also I have been having trouble with things like absolute range. There aren't any specific answers to the question but if you have trouble too, or you are really good at it lets