unowen

Popular questions and responses by unowen
  1. physics

    Robin Hood has to shoot an arrow at an apple that sits on a wall 400 meters away, at a height of 40 meters. He must shoot at an angle of 60 degrees. What must the initial velocity of the arrow be to hit the target? Assume he's shooting laying down on the

    asked on July 8, 2017
  2. math

    What is the maximum number of pieces you can divide a circular pizza into with 4 cuts? [All cuts must be distinct straight lines from one point on the edge of the pizza to another point on the edge of the pizza, and you may not move the pizza slices.]

    asked on July 6, 2017
  3. maths

    You have a calculator with 4 buttons.They can multiply the current value shown on the calculator by 2, divide the current value by 3, add 5 to the current value, or subtract 7 from the current value. If the screen starts at 6, what is the fewest button

    asked on July 27, 2017
  4. physics

    A car moving at 15 m/s skids to a stop after 20 m. How far will it skid if it is moving at 45 m/s, assuming that the braking force is constant?

    asked on June 9, 2018
  5. probability

    Amy and Blake are each dealt two cards from a standard, 52-card deck. Amy's cards are known, Blake's cards are unknown. In which of these two scenarios is it MORE LIKELY that Blake has a pair: A) Amy: Queen Queen Blake: face down, face down B) Amy: Queen

    asked on August 10, 2017
  6. maths

    Find the sum of primes p such that p²+11 has exactly six different positive divisors (including 1 and the number itself).

    asked on July 13, 2017
  7. probability and statistics

    Roll a fair six-sided die until you roll a number that is less than one of your previous rolls. To three decimal places, what is the expected value of the number of rolls made?

    asked on December 1, 2017
  8. maths

    What is the maximum number of coins that can be placed on squares in an 8x8 chessboard such that each row, each column, and each long diagonal contains at most 4 coins? (Note: Only 1 coin is allowed per square.)

    asked on July 12, 2017
  9. statistics and probabilities

    You have two coins that look identical, but one of them is fair and the other is weighted. The weighted coin has a 3/4 chance of flipping heads and a 1/4 chance of flipping tails. Unfortunately, you've forgotten which coin is which! You decide to keep

    asked on July 10, 2017
  10. Percentages

    In an examination, 40% students pass in Math, 45% pass in Science and 55% pass in English. 10% pass in Math and Science, 20% in Science and English and 15 % in English and Math. Find the percentage of students who passed in all the 3 subjects

    asked on March 27, 2020
  11. Conditional Probability

    Please refer to the illustration at screenshotsfirefoxcom/jZoizoMJf8a3H0UZ/ds055uzetaobbcloudfrontnet to help answer the following question: Zeb's coin box contains 8 fair, standard coins (heads and tails) and 1 coin which has heads on both sides. He

    asked on February 26, 2018
  12. algebra

    Solve for x: (2e^2x)-(7e^x)=15

    asked on November 20, 2017
  13. logic

    Ali and Zoe reach into a bag that they know contains nine lottery balls numbered 1-9. They each take one ball out to keep and they look at it secretly. Then, they make the following statements, in order: Ali: "I don't know whose number is bigger." Zoe: "I

    asked on August 12, 2017
  14. logic

    On a certain island there live only knights, who always tell the truth, and knaves, who always lie. One day you find 10 island natives standing in a circle. Each one states: "Both people next to me are knaves!" Of the 10 in the circle, what is the minimum

    asked on July 24, 2017
  15. maths

    A group of students decide to attend a concert. The cost of renting a bus to take them to the concert is $450, which is to be shared equally among the students. The concert promoters offer discounts to groups arriving by bus. Tickets normally costs $59

    asked on July 18, 2017
  16. statistics

    You have two coins that look identical, but one of them is fair and the other is weighted. The weighted coin has a 3/4 chance of flipping heads and a 1/4 chance of flipping tails. Unfortunately, you've forgotten which coin is which! You decide to keep

    asked on July 13, 2017
  17. spatial reasoning

    You have a pile of 1 x 2 unit dominoes. There's one way to tile a 1x2 area, 2 ways to tile a 2x2 area, 3 ways to tile a 3x2 area, and 5 ways to tile a 4x2 area. How many ways are there to tile a 5x2 area with your 1x2 domino tiles?

    asked on July 10, 2017
  18. surface area

    A unit cube with side lengths of 1 unit is cut into cuboids with heights of 1/2, 1/3, and 1/6 units, respectively. The pieces are then placed adjacent to each other to form a staircase. The total surface area of the original unit cube was 6 units. What is

    asked on July 10, 2017
  19. Geometry

    Which takes up more space: A single circle inscribed in a triangle, touching each side at a single point? Or, four identical circles, with 3 of them touching the center circle, and those same 3 touching one point each on the three sides of the

    asked on July 10, 2017
  20. Physics

    An archer lying on the ground shoots an arrow at a target that is 400 meters away, and 40 meters high. The initial velocity of the arrow is 120 m/s At what angle does he need to point his bow in order to hit the target? (Assume the value of g as -9.81

    asked on July 10, 2017
  21. math

    2x is a perfect square, 3x a perfect cube, and 5x a perfect 5th power. Find the sum of the exponents in the prime factorization of the smallest such positive integer x. Thank you.

    asked on June 30, 2017
  22. physics-density

    A solid right circular cone of uniform mass density is initially at rest above a body of water, so that its vertex is just touching the water's surface with its axis of symmetry along the vertical. Now, the cone falls into the water, and has zero speed at

    asked on June 16, 2017
  23. geometry

    What is the blue area in the graphic at the following link: drivegooglecom/file/d/1w4WF6LfpJB34pkmeRnN5EJsOPuk-ZQUS/view

    asked on March 23, 2020
  24. physics

    A stone is dropped from a ledge 45m high. What will its speed on reaching the Earth be?

    asked on June 13, 2018
  25. calculus

    If a ball is thrown at the height of 10m then it bounces by 3\5 of the 10 meter and continues to resting condition, what is the total distance covered by the ball until rest?

    asked on June 9, 2018
  26. algebra

    Given: a-b/c-d = 2 and a-c/b-d= 3 Given that a,b,c and d are real numbers, find the value of a-d/b-c...

    asked on April 9, 2018
  27. physics

    The illustration for this problem is at ds055uzetaobbcloudfrontnet/image_optimizer/142fdba0bc53bb9ae12ecea6de058f57fef01274.png A rope of length 90cm lies in a straight line on a frictionless table, except for a very small piece at one end which hangs down

    asked on March 30, 2018
  28. physics

    The illustration for this problem is at ds055uzetaobbcloudfrontnet/image_optimizer/142fdba0bc53bb9ae12ecea6de058f57fef01274.png A rope of length 90cm lies in a straight line on a frictionless table, except for a very small piece at one end which hangs down

    asked on March 28, 2018
  29. fractals

    The images for this question can be seen at ds055uzetaobbcloudfrontnet/image_optimizer/6e5bfce857320dea5985406428cba570440e5181.png and ds055uzetaobbcloudfrontnet/image_optimizer/8b43e0b9075d5c33c65862955d90fa767bb63dac.png A fractal pattern is created in

    asked on March 23, 2018
  30. algebra

    If a + 1/a=7, what is the value of a³ + 1/a³?

    asked on March 9, 2018
  31. physics

    The illustration for this problem can be seen at screenshots(dot)firefox(dot)com/atwXACAA9akaoAji/null The army is testing out a new prototype artillery cannon with an uncommonly high muzzle velocity of 1000 m/sec . The design bugs haven't been fully

    asked on March 8, 2018
  32. physics

    The illustration for this problem can be seen at screenshots(dot)firefox(dot)com/atwXACAA9akaoAji/null The army is testing out a new prototype artillery cannon with an uncommonly high muzzle velocity of 1000 m/sec . The design bugs haven't been fully

    asked on March 6, 2018
  33. logical reasoning

    You are asked to guess an integer between 1 and N inclusive. Each time you make a guess, you are told either: (a) you are too high, (b) you are too low, or (c) you got it! You can guess as many times as you like, but are only allowed to guess too high 10

    asked on February 21, 2018
  34. logical reasoning

    You are asked to guess an integer between 1 and N inclusive. Each time you make a guess, you are told either: (a) you are too high, (b) you are too low, or (c) you got it! You can guess as many times as you like, but are only allowed to guess too high 10

    asked on February 17, 2018
  35. algebra

    For the following question, please reference the graphic at: screenshotsfirefoxcom/cjbaIYetsJhJJimy/ds055uzetaobbcloudfrontnet Pictured is the graph of the equation 4x²=y(1-y)(2-y)² rotated around the y-axis. Find the volume of the egg.

    asked on February 17, 2018
  36. physics

    Please reference the illustration at screenshotsfirefoxcom/fDDGSaztdbf0b7Uh/brilliantorg for the following problem: A bunch of bananas of total weight W is hung at one end of a string passing over a perfectly smooth pulley. At the other end, a monkey

    asked on December 28, 2017
  37. algebra

    Please reference the photo at: screenshotsfirefoxcom/ak1Ss85a8nhM4o2t/brilliantorg for the question. What is the value of XY??? Thank you

    asked on December 18, 2017
  38. algebra

    15 can be written as the difference between two positive perfect squares: 15=4²-1²=16-1 Which of the following numbers cannot be written as the difference of two positive perfect squares? 16 17 18 19 20

    asked on December 1, 2017
  39. geometry

    Please reference the illustration at screenshotsfirefoxcom/kzZjGCIcg9EMQ0MH/brilliantorg to answer the following question: What percentage of the square's area is colored blue? 30% 35% 40% 45% 50%

    asked on December 1, 2017
  40. physics

    Please reference the illustration at: screenshotsfirefoxcom/kBXqJ4tycTCPwjUw/brilliantorg to answer the following question: On the edge of a wall, you build a brick tower that only holds because of the bricks' own weight. Your goal is to build a stable

    asked on December 1, 2017
  41. logic

    Three hats are placed on the heads of three men standing in a line. Each man can only see the men and hats in front of him. In addition, the men all know that the hats came from a bag with 3 red hats and 2 blue hats. Each man is asked if he knows which

    asked on November 29, 2017
  42. physics

    Philip forms three equal portions of leftover mashed potatoes into three shapes: a cube, a sphere, and a cylinder. Each portion is heated in the oven to the same uniform temperature. When he takes the portions out of the oven and leaves them at room

    asked on November 28, 2017
  43. math

    x is a positive integer such that the sum of its digits times 5 equals itself. What is x?? For example, 32 does not qualify because (3+2)x5=25, not 32. Prove there is only one possible value for x

    asked on November 28, 2017
  44. geometry

    Consider ann equilateral triangle, a circle, and a square that all have equal areas to each other. Which one would have the largest perimeter?

    asked on November 26, 2017
  45. geometry

    Please reference the illustration at screenshotsfirefoxcom/Cl7zsk8ZAmzCoMDM/brilliantorg to answer the following question: The Pharaoh would like to cover the lateral sides of his square pyramid with the finest marble. In order to save the cost of

    asked on November 26, 2017
  46. maths

    1,2,3,4,5 These five numbers are written on a whiteboard. You start with a score of 0. You pick two numbers, add their positive differences to your score, and erase your choice of one of the two numbers. This process is repeated until there is only one

    asked on November 26, 2017
  47. Mathematics

    Find the smallest positive integer which ends in 17, is divisible by 17, and whose digits sum to 17.

    asked on November 24, 2017
  48. probability

    There are 100 people in line to board a plane with 100 seats. The first person has lost his boarding pass, so he takes a random seat. Everyone that follows takes their assigned seat if it's available, but otherwise takes a random unoccupied seat. What is

    asked on November 23, 2017
  49. geometry

    Please refer to the following photo to answer this question: screenshotsfirefoxcom/0F0pXhMjyyk0fnnP/brilliantorg A kite is divided into four regions by two line segments that connect the midpoints of opposite sides. Is the total blue area equal to the

    asked on November 22, 2017
  50. physics

    Please reference the following picture for this question: screenshotsfirefoxcom/V57wh6MYWUXfnx5M/brilliantorg Initially, the U-tube shown above is filled with water, and the level on each side is l0. After some oil is poured on side A, the level on that

    asked on November 22, 2017
  51. calculus

    "screenshotsfirefoxcom/8POFA7yOO7VQ1QGz/null"

    asked on November 19, 2017
  52. math

    Calculate the sum of the series: π²/3!-π^4/5!+π^6/7!-π^8/9!+π^10/11!....

    asked on November 19, 2017
  53. math

    The pyramid of integers above is constructed in such a way that each "father" has exactly 3 "children": 1>2,3,4 2>5,6,7 3>8,9,10 4>11,12,13 5>14,15,16 6>17,18,19 . . . What number is the father of 2017?

    asked on November 19, 2017
  54. physics

    A rectangular box of length 2/3m is initially traveling at 2 m/s with its entire length over a smooth (perfectly frictionless)surface .The box gradually moves onto a rough surface and stops the instant that its entire length is positioned within the rough

    asked on November 19, 2017
  55. algebra

    Rob is 21 years old, angie is twice as old as Rob was when Angie was old as Rob is now, how old is angie?

    asked on November 16, 2017
  56. math

    There are 10 coins, 5 of which are heads up and 5 of which are tails up. On each turn, you choose exactly 3 coins and flip them over. What is the minimum number of turns needed to make all of the coins heads up?

    asked on November 16, 2017
  57. logic

    What is the least number of unit squares that you need to remove from a 5 by 3 checker board in order to make it impossible for anyone to put an "X" in 3 remaining squares to make a connected vertical, horizontal, or diagonal set of 3 (a set that looks

    asked on August 26, 2017
  58. logic

    What is the least number of unit squares that you need to remove from a 5 by 3 checker board in order to make it impossible for anyone to put an "X" in 3 remaining squares to make a connected vertical, horizontal, or diagonal set of 3 (a set that looks

    asked on August 24, 2017
  59. algebra

    For how many different pairs of numbers, a and b, are the following equalities true: a+b=a*b=a/b ??????? Thank you for your help.

    asked on August 23, 2017
  60. probability and statistics

    An ice-cream store has exactly 6 flavors of ice-cream. Each of 6 friends likes exactly 4 flavors. Is there guaranteed to be a flavor which at least 4 friends like?

    asked on August 7, 2017
  61. computer science

    Sara needs to needs to trek from an oasis to a destination 10 miles away across a barren desert. However, she finds herself dealing with the following limitations: a) Crossing one mile of desert requires using 1 gallon of water. b) She can only carry 6

    asked on August 7, 2017
  62. physics

    Suppose we are given an arbitrary form for the acceleration a(t) of a particle that starts from rest at r(t_i)=0. What would be the derivation of its' position at r(t_f): a)(t_f - t_i)⌠t_f a(t)dt ⌡t_i b) v(t_f)+v(t_i)/2 ((t_f-t_i)) c)⌠t_f dt ⌠t

    asked on August 7, 2017
  63. logic

    40 matchsticks are arranged to form a 4 by 4 grid of 16 smaller squares, 4 matchsticks to a small square. What is the fewest number of matchsticks that need to be removed so that there are no squares (of any size) remaining?

    asked on August 5, 2017
  64. logic

    40 matchsticks are arranged to form a 4 by 4 grid of 16 smaller squares. What is the fewest number of matchsticks that need to be removed so that there are no squares (of any size) remaining?

    asked on August 2, 2017
  65. maths

    The values A,B,C, and [(A/B)+C], are all integers which are divisible by 3. Then, which of the following statements must be true: A is divisible by 9 B is divisible by 9 C is divisible by 9 A and B are both divisible by 9 A,B,and C are all divisible by 9

    asked on July 27, 2017
  66. number theory

    The values A,B,C, and [(A/B)+C], are all integers which are divisible by 3. Then, which of the following statements must be true: A is divisible by 9 B is divisible by 9 C is divisible by 9 A and B are both divisible by 9 A,B,and C are all divisible by 9

    asked on July 26, 2017
  67. maths

    A group of students decide to attend a concert. The cost of renting a bus to take them to the concert is $450, which is to be shared equally among the students. The concert promoters offer discounts to groups arriving by bus. Tickets normally costs $59

    asked on July 20, 2017
  68. probability

    There are 100 people in line to board a plane with 100 seats. The first person has lost their boarding pass, so they take a random seat. Everyone that follows takes their assigned seat if it's available, but otherwise takes a random unoccupied seat. What

    asked on July 15, 2017
  69. physics

    Robin Hood has to shoot an arrow at an apple that sits on a wall 400 meters away, at a height of 40 meters. He must shoot at an angle of 60 degrees. What must the initial velocity of the arrow be to hit the target? Assume he's shooting laying down on the

    asked on July 9, 2017
  70. number theory

    If you wrote down at all whole numbers from 1 to 1000... 1,2,3,4,5....999,1000 ...which digit would appear the least?

    asked on July 6, 2017
  71. math

    A right triangle has vertices on a grid at (0,0), (8,0), and (8,6). There is a point on the hypotenuse, (4,3), made up of integers. The question is: If the corners of the triangle were instead at (0,0), (1200,0), and (1200,1000),how many dots from the grid

    asked on July 6, 2017
  72. math

    The positive number X is divisible by 42, and is composed of only 1s and 0s when written in base 10. What's the smallest number that X might be?

    asked on July 6, 2017
  73. geometry

    find the focus of x^2+4y^2+2x+24y++28=0. Thank you

    asked on July 3, 2017
  74. Physics

    Robin Hood is known for stealing from the rich to give to the poor. He finds himself surrounded by some angry noblemen who demand he return their gold chest. Outnumbered, he takes an arrow from his quiver and fires it straight into the air, scattering the

    asked on June 16, 2017
  75. Physics

    A solid right circular cone of uniform mass density is initially at rest above a body of water, so that its vertex is just touching the water's surface with its axis of symmetry along the vertical. Now, the cone falls into the water, and has zero speed at

    asked on June 15, 2017
  76. physics

    A solid right circular cone of uniform mass density is initially at rest above a body of water so that its vertex is just touching the waters surface with its axis of symmetry along the vertical. Now, the cone falls into the water, and has zero speed at

    asked on June 15, 2017
  77. Physics

    An interplanetary probe speeding in deep space suddenly needs to make a left turn. It is presently traveling at v=20000 m/s , and needs to make a quarter circle turn, continuing at the same tangential speed. It is equipped with an ion thruster rocket

    asked on June 14, 2017
  78. Geometry

    An equilateral triangle, ABC, has two of its vertices, A and B, below the x-axis; has the third vertex C above the x-axis, and contains the points (0,0) on segment AC, and (0,1) on segment BC. How long is the path traced out by all possible points C to two

    asked on June 13, 2017
  1. geometry

    Thanks for your help, guys. This problem's been nagging me for a while. The area of the square was 4x², once you solved for x............

    posted on March 25, 2020
  2. algebra

    3+1.5=4.5 4.5+1.5=6 6+1.5=7.5 . . . Since each subsequent number can be found simply by adding a constant to the previous number, the sequence is, by definition, an arithmatic progression

    posted on March 23, 2018
  3. math

    Out of 10 questions, you answer 4 1-pointers and 5 two-pointers, leaving one question incorrectly answered. If there are 4 1-point questions, and 6 2-point questions, this gives you 16 points total for the quiz. You miss one 2-point question, giving you a

    posted on March 2, 2018
  4. alegbra

    If the creator receives 8% of each game sold, then the company that produces the game gets the remaining 100-8, or 92% of the revenue. Let n be the selling price of the game. Then: .92n=10.10 n=10.10/.92=10.98 price of the game ☺☺☺☺

    posted on March 2, 2018
  5. algebra

    Let n be the amount contributed in 2002. In 2003, the contributions were 15% greater, or 1.15n. In 2004, the contributions were 10% greater than that, or 1.1(1.15)n. So: 1.265n=8855 n=7000 ☺☺☺☺

    posted on March 2, 2018
  6. Mathematics

    The cells divide every 5 minutes, starting from 1. Let x equal every 5 minute period. Then: 1,000,000=1*2^x ln 1,000,000=ln 2^x=x ln 2 x=19.93 19.93 x 5=99.66 minutes before the cell population reaches 1,000,000.

    posted on February 27, 2018
  7. Math

    The penny's height at any time, t, seconds would be given by the equation h(t)=-16t²+10t+300. It reaches its' maximum height at -10/-32, or 0.3125 seconds (-b/2a). This gives it a maximum height of 301.5625 ft. The penny lands at h(t)=0, or

    posted on February 27, 2018
  8. Math

    The architect was not hired because those side lengths are impossible to construct a triangle. Imagine the 2nd piece, 37 ft. Now, take the other two sides: 15 and 21 ft. The two shorter pieces would be, when added together, shorter than the first piece

    posted on February 26, 2018
  9. Algebra 1

    If this baseball is propelled upwards with a velocity of 30 ft/s, then the formula for its' height after t seconds would be: h(t)=-16t²+30t+6 It's maximum height is reached at -b/2a seconds, from the equation h(t)=a(t)²+b(t)+c. In this case, that would

    posted on February 26, 2018
  10. Math

    Let c be Christian, and m be Marie. Then: c=3m and m=c-12 So: 3(c-12)=c 3c-36=c 2c=36 c=18 ☺☺☺☺

    posted on February 17, 2018
  11. Math

    19/25 x 25000=19x25000/25=19 x (25000/25)=19x1000=19000 ☺☺☺☺

    posted on February 16, 2018
  12. math

    4πr²=4π(1.25)²=6.25π=19.63 in² 4/3 πr³=4/3 π(1.25)³=8.18123 in³ ☺☺☺☺

    posted on February 15, 2018
  13. math

    Let n be the total amount of registered doctors that year. Then: 0.233n=46800 n=46800/0.233=200858.37 doctors registered (rounds down to 200,858) ☺☺☺☺

    posted on February 15, 2018
  14. math

    Let d be the distance between Abigail's apartment and her campus. Then: d/3=d/12 +36/60 20d=5d+36 15d=36 d=36/15, or 12/5 miles between Abigail's apartment and the campus ☺☺☺☺

    posted on February 15, 2018
  15. math

    f(x)=3x²+12x+2 f(x)/3=x²+4x+2/3 f(x)/3 +4=x²+4x+4+2/3=(x+2)²+2/3 f(x)/3=(x+2)²-10/3 f(x)=3(x+2)²-10 Hope this helps ☺☺☺☺

    posted on February 12, 2018
  16. math

    y=2.9046(1.9798)^x Solve for y=13. So: 13=2.9046(1.9798)^x 13/2.9046=1.9798^x 4.47566=1.9798^x ln 4.47566=ln 1.9798^x=x ln 1.9798 x=2.1942355 The number of days, at that rate, would be 2.1942355 ☺☺☺☺

    posted on December 2, 2017
  17. Pre cal

    -3x^4+27x^2+1200=0 0=3x^4-27x^2-1200 (3x²+48)(x²-25)=0 3(x²+16)(x+5)(x-5)=0

    posted on November 29, 2017
  18. Mathematics

    thanks

    posted on November 25, 2017
  19. français

    why are researchers and scientists from african countries migrating to Western countries?

    posted on November 25, 2017
  20. Álgebra

    Let n be the common factor between the two pieces. Then, the length of each piece is given by 3n and 7n, respectively. The length of the longer piece would be 7n/v+4 So: 3n+7n=v+4 3n+7n/v+4=1 3n/v+4 +7n/v+4=1 7n/v+4=1-3n/v+4

    posted on November 24, 2017
  21. Algebra

    1.1^6=1.771561 1.771561*2100=3720.28

    posted on November 22, 2017
  22. Math

    4 ft=48 in 48 in/8 in=6 ☺☺☺☺

    posted on November 22, 2017