stranger

Most popular questions and responses by stranger
  1. maths

    ABC is an acute triangle with ∠BCA=35∘. Denote the circumcenter of ABC as O and the orthocenter of ABC as H. If AO=AH, what is the value of ∠ABC(in degrees)?

    asked on March 30, 2013
  2. Physics

    A 80 kg climber is standing horizontally on a perfectly vertical cliff face. The climber is 1.8 m tall and is attached by a 2 m long rope fastened around their middle to a point on the cliff above them. What is the normal force the cliff face exerts on the

    asked on March 18, 2013
  3. physics

    Consider a horizontal road with such a set of traffic lights, each spaced 100 m apart. A car sits at the first traffic light. At t=0 the light turns green and the car accelerates. What is the maximum time t in secondsthe next light must turn green

    asked on May 27, 2013
  4. Physics

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

    asked on April 1, 2013
  5. Geometry

    ABC is a right angled triangle with ∠ABC=90∘ and side lengths AB=24 and BC=7. A semicircle is inscribed in ABC, such that the diameter is on AC and it is tangent to AB and BC. If the radius of the semicircle is an improper fraction of the form a/b,

    asked on March 18, 2013
  6. Geometry

    Convex quadrilateral ABCD has sides AB=BC=21, CD=15 and AD=9. Given additionally that ∠ABC=60∘, what is the length of BD?

    asked on April 8, 2013
  7. physics

    Three identical conducting spheres are located at the vertices of an equilateral triangle ABC. Initially the charge the charge of the sphere at point A is qA=0and the spheres at B and C carry the same charge qB=qC=q. It is known that the sphere B exerts

    asked on May 13, 2013
  8. Probability

    A school is running a raffle for two prizes. 59 tickets were sold for the raffle, numbered 1,…,59. All the tickets are put into a hat and a teacher picks out two tickets which have numbers i and j from the hat. What is the expected value of |i−j|?

    asked on April 8, 2013
  9. geometry (help steve)

    A circle of radius 1 is drawn in the plane. Four non-overlapping circles each of radius 1, are drawn (externally) tangential to the original circle. An angle γis chosen uniformly at random in the interval [0,2π). The probability that a half ray drawn

    asked on June 24, 2013
  10. Maths

    ABC is a right angled triangle with ∠ABC=90∘ and side lengths AB=24 and BC=7. A semicircle is inscribed in ABC, such that the diameter is on AC and it is tangent to AB and BC. If the radius of the semicircle is an improper fraction of the form a/b,

    asked on March 19, 2013
  11. Trignometry

    ABCD is a square where M and N are midpoints of AD and CD, respectively. If sin∠MBN=a/b, where a and b are coprime positive integers, what is the value of a+b?

    asked on March 18, 2013
  12. Geometry

    Find the number of 6 -term strictly increasing geometric progressions, such that all terms are positive integers less than 1000.

    asked on May 16, 2013
  13. Geometry

    There are 100 runners, each given a distinct bib labeled 1 to 100. What is the most number of runners that we could arrange in a circle, such that the product of the numbers on the bibs of any 2 neighboring runners, is less than 1000?

    asked on April 20, 2013
  14. Science

    What is the likability of a earthquake and volcanic eruption happening in Minnesota

    asked on May 4, 2015
  15. Geometry(first one is typo)

    Let ƒÆ=sin −1 7/25 . Consider the sequence of values defined by a n =sin(nƒÆ) . They satisfy the recurrence relation a n+2 =k 1 a n+1 +k 0 a n ,n¸N for some (fixed) real numbers k 1 ,k 0 . The sum k 1 +k 0 can be written as p q , where p and q are

    asked on April 11, 2013
  16. Geometry

    Let ƒÆ=sin −1 7 25 . Consider the sequence of values defined by a n =sin(nƒÆ) . They satisfy the recurrence relation a n+2 =k 1 a n+1 +k 0 a n ,n¸N for some (fixed) real numbers k 1 ,k 0 . The sum k 1 +k 0 can be written as p q , where p and q are

    asked on April 11, 2013
  17. math

    ABC is a triangle with circumcenter O, obtuse angle BAC and AB

    asked on April 10, 2013
  18. maths

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

    asked on April 1, 2013
  19. Trigonometry

    Every point (x,y) on the curve y=log(3x)/log2 is transferred to a new point by the following translation (x′,y′)=(x−m,y−n), where m and n are integers. The set of (x′,y′) form the curve y=log(12x−96)/log2. What is the value of m+n? Details

    asked on March 25, 2013
  20. calculas

    At time t=0 s, the radius of a circle is equal to 15 cm. The radius of the circle increases at a rate of 0.5 cm/s. The rate of change of area at t=20 s is equal to mπ cm^2/s, where m is a positive integer. What is the value of m?

    asked on March 22, 2013
  21. math

    25 independent, fair coins are tossed in a row. What is the expected number of consecutive HH pairs? Details and assumptions If 6 coin tosses in a row give HHTHHH, the number of consecutive HH pairs is 3.

    asked on March 19, 2013
  22. Combinations Maths

    25 independent, fair coins are tossed in a row. What is the expected number of consecutive HH pairs? If 6 coin tosses in a row give HHTHHH, the number of consecutive HH pairs is 3.

    asked on March 18, 2013
  23. Number theroy

    What is the 50th smallest positive integer that can be written as the sum of distinct non-negative integer powers of 3?

    asked on March 18, 2013
  24. Limit Math

    Evaluate lim x→∞ 2x/(√(x^2+3)-4) in words 2x divide by(root(xsq +3) -4)

    asked on March 18, 2013
  25. Trignometry

    Let m and M be the minimum and maximum values of the domain of f(x)=sin^−1(x2−35), respectively. What is the value of M−m? sin^-1 is sin inverse

    asked on March 18, 2013
  26. Algebra

    A is a 2 by 2 matrix. Given that A=(5 1) (1 5) , what is the value of det(A)? det(A) is determinant of A

    asked on March 18, 2013
  27. geometry

    ABC is a triangle with AC=139 and BC=178. Points D and E are the midpoints of BC and ACrespectively. Given that AD and BE are perpendicular to each other, what is the length of AB?

    asked on June 24, 2013
  28. statics

    A bag contains 4 balls, each of which have a positive integer written on it. Let X be the random variable of the value written on a single ball drawn from the bucket. If E[X]=8, what is the maximum possible value of E[X^2]?

    asked on June 24, 2013
  29. physics

    An airplane of a certain density and shape flies at a constant speed. To do so, it must fly with a certain velocity v0. If the size of the airplane is scaled up in length, width, and height by a factor of two, it can only fly above a new velocity v1.

    asked on May 27, 2013
  30. physics

    Many of you may have noticed the phenomenon that basketballs get flat if the weather is cold. If a basketball was inflated to a gauge pressure of 60,000 Pa when the temperature outside was 20∘C, what is the gauge pressure inside the basketball in

    asked on May 27, 2013
  31. physics

    Two point charges +q=1 μC and −q=−1 μC with mass m=1 g are fixed at the positions ±r⃗ 0 with |r0|=1 m. The charges are released from rest at t=0. Find the time τ in seconds at which they collide.Hint: Can you do it without

    asked on May 13, 2013
  32. Geometry

    If two six-sided dice are rolled, the probability that they both show the same number can be expressed as a b where a and b are coprime positive integers. What is the value of a+b ?

    asked on April 11, 2013
  33. maths

    A group of 5 people are going to meet weekly at the library for 4 weeks. Each week, two people are selected at random to speak. Each person may speak in multiple weeks, but no pair of people will speak together more than once. The probability that there is

    asked on April 2, 2013
  34. maths

    A group of 5 people are going to meet weekly at the library for 4 weeks. Each week, two people are selected at random to speak. Each person may speak in multiple weeks, but no pair of people will speak together more than once. The probability that there is

    asked on April 1, 2013
  35. maths

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

    asked on April 1, 2013
  36. Algebra

    As x ranges over all real values, what is the minimum value of f(x)=|x-123|+|x-456| + |x-789|

    asked on March 26, 2013
  37. Maths Probability

    When writing a math expression, any time there is an open bracket "(", it is eventually followed by a closed bracket ")". When we have a complicated expression, there may be several brackets nested amongst each other, such as in the expression

    asked on March 25, 2013
  38. Combinations Maths

    For how many positive integers n are there exactly ⌊n/2⌋ or ⌈n/2⌉ primes less than or equal to n?

    asked on March 18, 2013
  39. Geometry

    BC is a triangle with ∠BAC=60∘,AB=5 and AC=25. D is a point on the internal angle bisector of ∠BAC such that BD=DC. What is AD^2? It is not stated that D lies on BC. This assumption is not necessarily true.

    asked on March 18, 2013
  40. Algebra

    Let S(N) denote the digit sum of the integer N. Let M denote the maximum value of N/S(N), where N is a 3-digit number. How many 3-digit numbers N satisfy N/S(N)=M? The digit sum of an integer is the sum of all its digits. For example, the digit sum of

    asked on March 18, 2013
  41. Algebra

    We define n♡ recursively as follows. 1♡=1; n♡=((n−1)♡)⋅n+1 Find the largest n

    asked on March 18, 2013
  42. Algebra

    How many positive integers n≤1000 cannot be written in the form a2−b2−c2 where a,b and c are non-negative integers subject to a≥b+c?

    asked on March 18, 2013
  43. Slope Maths

    What is the slope of the line tangent to the quadratic f(x)=4x^2−3x+6 at x=7?

    asked on March 18, 2013
  44. Trignometry

    The angles in triangle ABC satisfy 6sin∠A=3√(3)sin∠B=2√(2)sin∠C. If sin^2∠A=a/b, where a and b are coprime positive integers, what is the value of a+b?

    asked on March 18, 2013
  45. Algebra

    The function f(x)=x^4−10x^3+40x^2−80x+64 has four complex roots, one of which is 2−2i. What is the sum of all real and imaginary coefficients of these roots? i here is imaginary unit i.e. i^2 = -1

    asked on March 18, 2013
  1. L.A

    All is wrong or eighter the questions are switched

    posted on May 14, 2019
  2. Language arts

    I think there similarity would be they both want to help Milo in anyways that they can. But they both differ in character as well as beliefs in life. Tock is responsible, brave and loyal. He wants Milo to learn that time should not be wasted but rather it

    posted on March 22, 2019
  3. math

    Thx So much although I'm late

    posted on March 21, 2019
  4. math

    Whats the answer tho

    posted on February 14, 2019
  5. Social Studies

    ^ BETTTTTTTTTTT

    posted on October 16, 2017
  6. Science

    Correct.

    posted on October 16, 2017
  7. connections Academy sucks

    same I turned in a portfolio and did everything they told me too do and turned it in and then I couldent do my lesson for the next day cause they said I did not do it, I turned in my work and they said "oh it was not good enough do it again" and I had to

    posted on November 8, 2016
  8. Math

    1 because she only has 1 pair of jeans

    posted on October 4, 2016
  9. math

    Nothing is helpful I got 1 13/20

    posted on October 4, 2016
  10. math

    Why do you just use the denominators?

    posted on October 4, 2016
  11. geometry

    -7

    posted on July 29, 2016
  12. SS

    Is it C or D?

    posted on January 25, 2016
  13. social studies

    wow thanks a lot I go to connections two and it is ok ig

    posted on April 15, 2015
  14. physics

    Lol brilliant cheaters wtf

    posted on January 14, 2014
  15. geometry

    150

    posted on August 5, 2013
  16. SCIENCE,PHYSICS

    3 is the answer Ohh brilliant cheateres rockzzz Calvin shokzzz Plz tell other answers to public

    posted on July 4, 2013
  17. math

    wrong 326

    posted on June 1, 2013
  18. physics

    P1/t1=p2/t2

    posted on May 28, 2013
  19. math

    He is correct only 1 integer satisfy he mean

    posted on May 2, 2013
  20. Maths

    yes it is 3

    posted on April 14, 2013
  21. Geometry

    What is a and what is b?

    posted on April 11, 2013
  22. maths

    I got it till now maximize a+b, if Re (b)=-Im(a), Re (a)-21

    posted on April 3, 2013
  23. maths

    thanks

    posted on April 1, 2013
  24. Algebra

    Strange r meets stranger

    posted on March 26, 2013
  25. Physics/math

    Can't get it, Didn't studied this topic, Would you please work the solution.

    posted on March 26, 2013
  26. GEOMetry(TRIANGLE)

    how

    posted on March 25, 2013
  27. Trigonometry

    Suppose N = xyzyx, where x is nonzero but y and z could be any digit. Then there are 9(10^2) = 900 possible palindromes to consider. Recall that a number is divisible by 4 iff its last two digits are divisible by 4. Thus, if N is divisible by 4, then "yx"

    posted on March 21, 2013
  28. Math

    700 $ make 42281 $ in ten years Totally wrong this cant be true He had invested money that will be get in a collection not in payment

    posted on March 19, 2013
  29. algebra

    Let no. of men be x No. of women = 5x + 2 Total students = No. of men + women 50=x + 5x+2 48=6x x=8 No. of women = 5x + 2 = 5 * 8 + 2 =42 (ans)

    posted on March 19, 2013
  30. Math

    This Compound interest using Amount = principle * ((Rate + 100)/100)^time Here Rate is per time period i.e 8% per annum will be 2% per quater Time period is 10 years = 40 quater year P=700 $ Putting values Amount = 700 * ((2+100)/100)^40 =700 * (51/50)^40

    posted on March 19, 2013
  31. math

    30 + 20/((1*5)*2) since 1*5 = 5 and 5*2 = 10 this become 30 + 20/10 30+2 32

    posted on March 19, 2013
  32. Physics help ASAP please

    No direction no length of river how broad river is then how to find?

    posted on March 19, 2013
  33. math

    how

    posted on March 19, 2013
  34. Arithmetic

    B-1/2 Let no. of books be x No. of history books equal x into 1/3 I.e.x/3 No. Of English books equal x into 1/3 I.e. x/6 Rest books = no. Of science books =total books -(history books+English books) =×-(×/3 +×/6) =x-(3x/6) =x-x/2 =x/2 books are of

    posted on March 19, 2013
  35. Mathematics

    Try to use remainder therom reverse it from divident subtract remainder then divide with no remainder ans will come

    posted on March 18, 2013
  36. Combinations Maths

    okk

    posted on March 18, 2013
  37. Physics

    i could not get there hw to put angle

    posted on March 18, 2013
  38. physics

    0.0928 kg

    posted on March 18, 2013
  39. easy algebra!

    10

    posted on March 18, 2013
  40. math

    2 & 3 are both factors of 6. Meaning whenever 6 goes in a set, it can be replaced by two 3's or three 2's. 6 * 4 6 * 3; 3 * 2 6 * 3; 2 * 3 6 * 2; 3 * 4 6 * 2; 2 * 6 6 * 2; 3 * 2; 2 * 3 6 * 1; 3 * 6 6 * 1; 2 * 9 6 * 1; 3 * 4; 2 * 3 6 * 1; 3 * 2; 2 * 6 6 *

    posted on May 9, 2012
  41. Psychology

    According to Freud, defense mechanisms are protective methods, by the ego, that reduce anxiety by unconsciously distorting reality. Definitions & Examples: Repression - banishing anxiety-arousing thoughts, feelings, and memories from consciousness. e.g.

    posted on May 9, 2012
  42. Calculus

    Oops, sorry about that, the correct answer is 7 (4 * 6) + (5 * -2) + (-1 * 7) 24 + (-10) + (-7) 14 + (-7) 7 7.

    posted on May 9, 2012
  43. Calculus

    The Dot Product is a scalar (number) (4 * 5) + (5 * -2) + (-1 * 7) 20 + -10 + -7 10 + -7 3 3.

    posted on May 9, 2012
  44. algebra

    Let x = side of square to cut off from each corner 20 - 2x = width of bottom rectangle 28 - 2x = length of bottom rectangle V = x(20 - 2x)(28 - 2x) = 4x(10 - x)(14 -x) = V = 4x(140 - 24x + x²) V = 4(140x - 24x² + x³) Differentiating and equating to zero

    posted on May 9, 2012
  45. Math

    There are 16 oz in 1 lb. So, 1 lb 4 oz = (1 * 16) + 4 = 20 oz -- Each day, Robert feeds his dog 20 oz If the bag is 40 lbs, and 1 lb = 16 oz -- The bag is 640 oz 640 oz of food, divided by 20 oz servings -- It will last 32 days.

    posted on May 9, 2012
  46. choice

    Healthy behaviors and choices are decisions made when one is conscience of their overall health status, and thus will lead to minimized negative consequences. Overtime, this will positively affect an individual's health status. Conversely, behaviors that

    posted on May 9, 2012