Popular questions and responses by Jonathan
  1. life orientation

    Define risk behavior and explain why it is important for teenagers to investigate and be knowledgeable about it.

    asked on August 21, 2015
  2. mathematics

    two observer p and r 15 meters apart observes a plane in the same vertical plane and from the same side of the kite,the angles of elevatio of the plane from p and r are 30 60 respectively.find the height of the plane to the nearest meter.

    asked on July 29, 2020
  3. physics please help

    A golfer, driving a golf ball off the tee, gives the ball a velocity of +40 m/s. The mass of the ball is 0.045 kg, and the duration of the impact with the golf club is 4.05E-3s. (a) What is the change in momentum of the ball? (b) Determine the average

    asked on November 5, 2010
  4. trig

    Two ships, one sailing at 30 km/hr and the other at 45 km/hr, left port at the same time. Three hours later they were 120 km apart. If you had to find the angle between their courses an equation that could be used to solve this problem is:

    asked on February 24, 2008
  5. Physics

    a stone is projected at an angle of 60 degree and an initial velocity of 20 m/s .determine the time of flight

    asked on October 27, 2019
  6. Geometry

    10. Which of the following quadrilaterals always have diagonals that are congruent. Circle all that apply Parallelograms Rectangles Rhombi Squares Isosceles trapezoids 19. Given square ABCD: if the measure of angle ACB = (1x - 32) degrees, find the value

    asked on February 7, 2018
  7. Geometry

    Point $G$ is the midpoint of median $\overline{XM}$ of $\triangle XYZ$. Point $H$ is the midpoint of $\overline{XY}$, and point $T$ is the intersection of $\overline{HM}$ and $\overline{YG}$. Find the area of $\triangle MTG$ if $[XYZ] =150$.

    asked on April 21, 2016
  8. Physics

    Two perpendicular forces have a resultant of 13N.if one of the forces is 5N, the other force is?

    asked on March 11, 2017
  9. Calculus

    The position of a particle on the x-axis at time t, t > 0, is s(t) = ln(t) with t measured in seconds and s(t) measured in feet. What is the average velocity of the particle for 1 ≤ t ≤ e? a)1 b)e c)e-1 d)1/(e-1)

    asked on November 29, 2016
  10. Organic Chemistry

    What is the white solid that quickly forms when the methyl salicylate is added to the sodium hydroxide solution? I know that it is this equation but I wanted to know what is the name of the white solid: HOC6H4COOCH3 + NaOH „³ HOC6H4COO- Na+ + CH3OH

    asked on April 3, 2010
  11. Geometry

    A photographer enlarged a picture. If the width of the image is 5 inches and the width of the pre-image was x, what is the scale factor for the dilation in terms of x?

    asked on January 5, 2016
  12. Maths

    if COS A=3/5 and Sin B=7/25, when A us acute and B is obtuse, find without using tables. the value of COS(A+B)

    asked on January 7, 2020
  13. Math

    A spinner is divided into 8 equal sections. Each section is numbered 1-8. Find each probability for one spin.

    asked on January 19, 2017
  14. Science

    1. Aquaculture is the practice of farming sea organisms as a renewable food source. A. True B. False. 2. Selectively cutting down trees on an area of land can be best described as A. cutting down certain trees while leaving other trees standing B. cutting

    asked on February 3, 2014
  15. Math

    In a class of 20 students, 40% are boys. Twenty-five percent of the boys and 50% of the girls wear glasses. How many students wear glasses?

    asked on March 6, 2018
  16. Calculus

    The driver of a car traveling at 60 ft/sec suddenly applies the brakes. The position of the car is s(t) = 60t − 1.5t^2, t seconds after the driver applies the brakes. How many seconds after the driver applies the brakes does the car come to a stop? a)60

    asked on November 29, 2016
  17. lively

    Suppose that four times the square of a number equals 20 times that number. Whatis the number? It'll take you 45 seconds if you just plug in a few numbers Again -- putting the subject in the subject line helps. =) 4 n^2 = 20n zero is one solution. Solve

    asked on November 26, 2006
  18. Chemistry

    What is the balanced equation between mannitol and boric acid

    asked on October 2, 2019
  19. maths

    express log9 in terms of log3 x and log3 y and solve for x and y simultaneously

    asked on January 21, 2017
  20. English Check

    The advice was meant for ____ A)you and i B)she and i C) you and me Hello i need help. My original answer was A)you and I. But then I started reading a book on English grammar and it says it should be C)she and I since they are subject pronouns.

    asked on September 1, 2016
  21. Help with science

    1. Aquaculture is the practice of farming sea organisms as a renewable food source. A. True B. False. 2. Selectively cutting down trees on an area of land can be best described as A. cutting down certain trees while leaving other trees standing B. cutting

    asked on February 3, 2014
  22. US History

    Why Is Alfred T Mahan Important To Us Today?

    asked on October 4, 2012
  23. Statistics

    Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate. Student's grades - A, B, or C, on a test.

    asked on June 26, 2011
  24. math question corrected

    a farmer bought chickens, goats and sheep. the cost of a chicken is .50 goat is $3.50 and sheep is $10 He bought 100 animals and spent $100. how many of each animal did he buy please help! I need this for school tomorrow Since you have two equations and

    asked on August 18, 2005
  25. Chemistry

    What's the resulting solution if 2000cm3 of 1MH2S04 is mixed with 20cm3 of 1M NaOH? i got 0.5M,acidic in concentration.

    asked on March 10, 2017
  26. Math

    In lowest gear on a 10-speed bike, each turn of the pedals makes the wheels turn 3.4 times. In the highest gear, each turn of the pedals makes the wheels turn 1.8 times. With each turn of the wheels, the bike travels 6.5 feet. How much farther does the

    asked on September 24, 2012
  27. Calculus

    Sketch a possible graph for a function that has the following characteristics. f(0)=2.5 -horizontal asymptote is y=3 -Vertical x=4 -f'(x)0 for x>4. -f'(x)

    asked on March 2, 2012
  28. physics

    To enter the main pool at an amusement part, a swimmer uses a water slide which has a vertical height of 2.65 m. Find her speed at the bottom of the slide if she starts with an initial speed of 0.950 m/s.

    asked on November 10, 2011
  29. physics

    A putting green is located 240ft horizontally and 64ft vertically from the tee. What must be the magnitude and direction of the initial velocity if a ball is to strike the green at this location after a time of 4 seconds?

    asked on January 27, 2011
  30. Geometry

    D is between C and E. CE=6x, CD=4x+8, DE=27. Find CE

    asked on November 5, 2010
  31. Physical Science

    If 30 N of force is exerted over an area of 20 m2, how much pressure is being applied in pascals?

    asked on May 31, 2010
  32. Math - Pre- Clac

    Prove that each of these equations is an identity. A) (1 + sinx + cos x)/(1 + sinx + cosx)=(1 + cosx)/sinx B) (1 + sinx + cosx)/(1 - sinx + cosx)= (1 + sin x)/cosx Please and thankyou!

    asked on December 14, 2009
  33. Trig word problem

    A park ranger at point A sights a redwood tree at point B at an angle 23 degrees from a fire tower at point C, From the fire tower, the Angle between the ranger and the tree is 123 degrees. If the ranger at point A is 2.3 miles from the fire tower at point

    asked on February 24, 2008
  34. Algebra II

    Solve x^2+2x=-2 by graphing and indicate the roots.Please and thank you We can't draw graphs for you here. The roots are x = -2.73 and -0.73 I suggest you make your own graph of y = x^2 + 2x and see where it crosses the horizontal line y = -2. Choose x

    asked on August 8, 2007
  35. math

    a farmer bought chickens, goats and sheep. He bought 100 animals and spent $100. how many of each animal did he buy If this is an algebra problem, you need to know the cost of each animal. There is not enough information. sorry, the cost of a chicken is

    asked on August 18, 2005
  36. Algebra

    In a rectangular room 10 feet wide, 40 feet long and 15 feet high there are four windows, each 30 inches by 48 inches. What is the ratio of window surface to floor area in this room?

    asked on May 7, 2020
  37. math

    The scale of two similar triangles is 1:4. The perimeter of the smaller triangle is 60 centimeters. What is the perimeter of the larger triangle?

    asked on March 15, 2020
  38. Biology

    Based on current evidence, what process most accurately describes how chloroplasts and mitochondria evolved? a.photophosphorylation b.endosymbiosis c.photosynthesis d.cellular respiration I personally think the answer is d.

    asked on March 5, 2019
  39. social studies

    Which of these were holy Hindu scriptures written by gurus to help connect people to heavenly forces?

    asked on November 4, 2018
  40. Using Geometry in Probability

    Allen and Bethany each arrive at a party at a random time between 1:00 and 2:00. Each stays for 15 minutes, then leaves. What is the probability that Allen and Bethany see each other at the party?

    asked on July 6, 2018
  41. Health

    How might a forest fire affect the health of people in nearby communities? (Select all that apply.) a. increased risks of asthma attacks b. increased risks of viral infections c. increased risks of bacterial infections d. increased risks of heart problems

    asked on May 14, 2018
  42. Health

    Why are routine screenings for cervical cancer important? (Select all that apply.) a. Cervical cancer screenings guarantee a longer life. b. Cervical cancer screenings can identify precancerous cells. c. They can identify cancer cells before symptoms

    asked on May 14, 2018
  43. math

    Find the area of the rhombus. Round to the nearest tenth if necessary. M(0,4), N(3,0), P(0,-3), Q(-3,0)

    asked on April 4, 2018
  44. math

    Given the coordinates of the vertices of a quadrilateral, determine whether it is a square, a rectangle or a parallelogram. Then find the area of the quadrilateral. E(–7, –1), F(2, –1), G(–4, –8), H(5, –8)

    asked on April 4, 2018
  45. Biology

    What's the largest and most successful kingdom in the animal kingdom?

    asked on March 11, 2017
  46. 10th Grade Math

    A history class is comprised of 6 female and 9 male students. If the instructor of the class randomly chooses 5 students from the class for an oral exam, what is the probability that 2 female students and 3 male students will be selected? Round your answer

    asked on August 30, 2016
  47. pre calc


    asked on July 31, 2016
  48. chemistry

    what volume of glycerine C3H8O3, with a density of 1.26 g/mL should be taken to obtain 2.50 ml of glycerine?

    asked on April 17, 2016
  49. maths

    4x+16y:32 and 4x+y:17

    asked on February 13, 2016
  50. physics

    A capacitor,consisting of two metal plates each of area 50cm2 and space 0.2mm apart in air ,is connected across a 120V supply.Calculate (1)the energy stored..(2)the electric flux density and the potential gradient..

    asked on February 13, 2016
  51. Calculus

    Givenƒ(x) = ex, verify that lim h->0 (e^x+h - e^h)/h + e^x and explain how this illustrates that ƒ′(x) = ln e • ƒ(x) = ƒ(x)

    asked on July 22, 2015
  52. chemistry

    Determine the limiting reactant for this reaction if 3.027 grams of Aluminum are reacted with 60.00 mL of a solution that is 6 M KOH. Determine the amount of KAl(SO4)2•12 H2O that can be produced from this reaction. Molar mass Alum = 474 g/mol 2 Al (s) +

    asked on March 29, 2015
  53. Probability

    Consider 10 independent tosses of a biased coin with the probability of Heads at each toss equal to p, where 0

    asked on March 3, 2015
  54. math

    Michaela makes original stationary to give away as gifts. She likes to put a small bow in the corner of each card. She purchased a piece of ribbon that was 3 1/4 ft long. She can make each bow out of 1/3 ft of ribbon. Which equation would be used to show

    asked on January 16, 2015
  55. Calculus

    A 13 foot ladder is leaning against the house when it's base starts to slide away. By the time is 12 feet from the house the base is moving at the rate of 5 ft/sec. 1.How fast is the top of the ladder sliding down the wall at that moment? 2. At what rate

    asked on October 16, 2014
  56. Physics

    A 2050 kg truck is traveling east through an intersection at 2.3 m/s when it is hit simultaneously from the side and the rear. (Some people have all the luck!) One car is a 1200 kg compact traveling north at 4.5 m/s. The other is a 1600 kg midsize

    asked on March 8, 2014
  57. math

    The graph shows the cost C in dollars to rent a car for one day as a function of the number m of miles driven. Which of the following functions models the situation?

    asked on December 1, 2012
  58. Us History

    In need of help, Who Did Alfred T Mahan Look Up To As A Child?

    asked on October 4, 2012
  59. Physics

    Electrical conductivity in liquid solutions depends on the presence of free 1) neutrons 2) protons 3) molecules 4) ions explain please I really don't understand this question

    asked on March 7, 2012
  60. U.S History

    Why was there an Agricultural boom during WW1? Why did the boom come to an end?

    asked on March 7, 2012
  61. physics

    wo packages at UPS start sliding down the ramp shown in the figure. Package A has a mass of 4.50 and a coefficient of kinetic friction of 0.190. Package B has a mass of 10.5 and a coefficient of kinetic friction of 0.170.

    asked on February 20, 2012
  62. Korean

    how do you say merry christmas in korean?

    asked on December 6, 2011
  63. STATS

    Scientists wish to test the mind-readiing ability of a person who claims to have ESP. They use five cards with different and distinctive symbols( square, cicrle, triangle, line, squiggle). Someone picks a card at random and thinks about the symbol. The

    asked on October 17, 2011
  64. Pre-Calc-Please check I'm desperate

    Please check my answers I really need to do my homeowrk!;This are polar coordinates we're studying-I'm almost positive the first two are correct. 1.Which of the folowing is another representation of (-3,pi)? (3,120degree) (3,0 degree)I think it is this

    asked on September 27, 2011
  65. MATHS


    asked on May 4, 2011
  66. Chemistry

    Phosphorous trichloride (PCl3) is produced from the reaction of white phosphorous (P4) and chlorine: P4(s) + 6Cl2(g) ! 4 PCl3(g) . A sample of PCl3 ofmass 280.7 g was collected from the reaction of 70.86 g of P4 with excess chlorine. What is the percentage

    asked on March 23, 2011
  67. Physics

    A child rides a toboggan down a hill that descends at an angle of 11.5 degrees to the horizontal. The hill is 36.6 m long. What is the horizontal component of the child’s displacement? Answer in units of m. What is the vertical component of the child’s

    asked on March 16, 2011
  68. stoichiometry

    Ammonia gas reacts with oxygen gas according to the following equation: 4NH3 + 5O2----4NO + 6H2O a. How many moles of oxygen gas are needed to react with 23 moles of ammonia? (29 mole) b. How may grams of NO are produced when 25 moles of oxygen gas react

    asked on February 9, 2011
  69. Math

    I am working with bases. I don't understand. What, if anything, is wrong with the following numerals? A. 306four B. 1023two

    asked on January 20, 2011
  70. physics

    A daredevil jumps a canyon 10.6 m wide. To do so, he drives a car up a 19° incline. (The daredevil lands on the other side of the canyon at the same elevation as takeoff.) What minimum speed must he achieve to clear the canyon?

    asked on October 21, 2010


    asked on April 21, 2010
  72. Government.

    The main reason why the Constitution dealt specifically with the crime of treason was that: A. The framers wanted to prevent all treason in order to protect the democracy. B. Treason was not considered a serious crime before the Constitution was written.

    asked on April 21, 2009
  73. Maths

    if cosA = 4/5; sin

    asked on April 17, 2008
  74. Chemistry

    The nuclide 12 N 7 is unstable. What type of radioactive decay would be expected??? my guess is either gamma or beta. are either of those correct?

    asked on March 4, 2008
  75. Chemistry

    HELP! we just started kinetics and i have no clue how to solve this problem. For the reaction between reactants A and B below, if 4.925 moles of A is placed into a flask with excess B it is found that the amount of A remaining after 6.85 seconds is 2.737

    asked on February 20, 2008
  76. Physics

    The 2-cm (radius) current loop shown in the figure is changing from θ1 = 11 degrees to θ2 = 66 degrees in a magnetic field 2 T in 0.5 seconds. What is the magnitude of the induced emf to the nearest hundredth of a millivolt? The wire in Problem 2 has

    asked on March 27, 2007
  77. Japan

    social studies) Question:How many distance is Japan from the US? It is 6760 from New York Ciy to Tokyo It is 4791 miles from Seattle to Tokyo It is 3862 miles from Honolulu to Tokyo It is 2444 miles from Anchorage to Sapporo Take your pick The last entry

    asked on January 22, 2007
  78. Algebra

    From fours cans with 96 bolts in each 3/4 of the bolts In one can are used, as are 5/8 of the bolts in the second can are used, 1/2 of the bolts in a third can, and 1/4 in the remaining can. What is the fraction in the total number of bolts remaining in

    asked on May 8, 2020
  79. Algebra

    The average number of bends which an electrician can finish per hour on a defective conduit bender is 2/3 the number that can be finished per hour on a bender in good repair. If it requires 45 minutes to bend 9 conduits with a defective bender, how many

    asked on May 6, 2020
  80. Physics

    Two point charges of equal magnitude repel each other with a force of 5.49 Newtons when separated by 15.1 cm. Find the magnitude of the charge (in Coulombs).

    asked on March 13, 2020
  81. Physics

    A force of 0.460 N exists between a positive charge of 8.50 10-6 C and a negative charge of -3.22 10-6 C. What distance separates the charges?

    asked on March 13, 2020
  82. Math

    Maribeth works in a dog rescue centre. At feeding time, 5 of the dogs each get 3/4 kg of food and 3 dogs each get 3/5 kg of food. How much food does Maribeth feed to the dogs?

    asked on February 3, 2020
  83. Programming

    In HTML, we can include any Unicode characters. All special characters in HTML are specified in the form: &spec; These special characters all start with the ampersand and end with a semicolon. How would you specify the symbols ¬ , ∨ , and ∧ in HTML?

    asked on January 29, 2020
  84. Math

    What colors are specified by these hexadecimal values? How many bits are assigned to each color? What is the range of values for each of the primary colors used on web pages?

    asked on January 29, 2020
  85. Math

    How many hexadecimal digits are used to specify a color in a web page?

    asked on January 29, 2020
  86. Physics

    While decorating her apartment, Julie pushes a 608-N dresser across the floor by applying a 578-N horizontal force. The coefficient of friction between the dresser and the floor is 0.745. Determine the magnitude of the acceleration (in m/s/s) of the

    asked on January 11, 2020
  87. Physics

    Block B is on a resistance-free surface and a horizontal force of 4.54 N acts on the block. This force produces an acceleration of 2.44 m/s/s. Block A, which has a mass of 4.38 kg, is then dropped onto Block B as shown in the "after" picture. The same

    asked on January 10, 2020
  88. World History

    The death of Charlemagne and decline of his empire led to this system becoming a widespread solution to a lack of central authority. A) Feudalism B) Communism C) Confucianism D) Anarchism

    asked on December 19, 2019
  89. music

    what do neumes above text represent?

    asked on May 31, 2019
  90. Algebra

    -2y + 6x + 2 = 0 y= -4 - 2x

    asked on November 12, 2018
  91. Math

    I need help on a quiz it is called mid unit review for 7th grade

    asked on September 20, 2018
  92. physics

    A force F applied to an object of mass m causes it to move in a straight line a distance D during an interval of time T. The object gains kinetic energy K during this interval. In which of the following cases will the object gain the same kinetic energy K?

    asked on May 21, 2018
  93. Calculus

    Find d/dt integral[2 to x^2](e^x^3)dx

    asked on May 16, 2018
  94. Statistics

    What is a diagram that shows the frequency of data on a number line. I honestly don't know.

    asked on April 9, 2018
  95. math

    Find the area of the figure. Round to the nearest tenth if necessary. L(3,6), M(7,3), N(6,-1), J(2,-1), K(3,3)

    asked on April 5, 2018
  96. Math

    Solve the equation. 100^(5x+2)=1000^(4x-1)

    asked on March 14, 2018
  97. Geometry

    10. Which of the following quadrilaterals always have diagonals that are congruent. Circle all that apply Parallelograms Rectangles Rhombi Squares Isosceles trapezoids 19. Given square ABCD: if the measure of angle ACB = (1x - 32) degrees, find the value

    asked on February 6, 2018
  98. PAVCS

    How many moles of gas are in a 20 liter scuba canister is 300k and pressure is 200 atm

    asked on January 26, 2018
  99. Social Studies

    1. In the AD 600s, North africa was conquered by A. Egyptians B. Arab Muslims C. Europeans D. Africans from south of the Sahara

    asked on November 1, 2017
  100. Physics

    a golf ball is shot from a tee which is located 18.0m above the green. The initial velocity of the golf ball is 42.0 m/s at an angle of 50.0 degrees above the horizontal. The ball behaves as an ideal projectile during its flight from the tee to the

    asked on October 16, 2017


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