Posts by Kay

Total # Posts: 817

  1. Chemistry

    HA(aq) <-> H+(aq) + A-(aq) K = 5.0 x 10 -9 The initial concentration of HA is 0.30 M What is the final equilibrium concentrations of HA, H+, A-? Show work, solve if you can
  2. Chemistry

    The rate equation for the hydrolysis of sucrose to fructose and glucose is first order. After 27 minutes the sucrose concentration decreased from 0.0146M to 0.0132M. Find the rate constant K. Please help me!
  3. Social studies

    Why were the island shown on this map most likely acquired or annexed by the United States?
  4. Genetics

    Given the following portion of a double stranded DNA molecule, 3’GATCTCGATGTCGAGATC5’ draw the bands as they would appear on a Sanger DNA sequencing gel using the following primer 5’GATCTCGA3’
  5. Trig

    A tourist looks from the observation deck of the space needle in Seattle. The deck is at a height of 520ft. She sees her friend on the ground below at an angle of depression of 83.1 degrees. What is the distance between the two? Round to the nearest tenth of a foot. Options: ...
  6. Trig

    Last question! Just seeing why I’m getting these wrong In a right triangle with a leg of 4 and a hypotenuse of 8, find the measure of all angles. Correct answer: 30deg, 60deg, 90deg How?
  7. Trig.

    Thank you
  8. Trig.

    Given sin ? 3/5, find a, the other angle in the right triangle The answer is 30,60,90 How is this someone explain?
  9. Trigonometry

    Thank you
  10. Trigonometry

    a 10ft ladder is resting against the wall. the ladder touches the ground 6ft away from the wall. what angle, rounded to the nearest tenth, id the bottom of the ladder making with the ground The correct answer is 53.1 degrees Can someone explain how to get this?
  11. physics

    The height of the Empire State building is 318.00 meters. A pebble is dropped from the top of the building, what is the stones velocity just before it strikes the ground?
  12. Chemistry

    If the pressure of the gas inside the flask were increased and the height of the column in the open-ended arm went up by 0.5mm, what would be the new pressure of the gas in the flask, in torr? ANSWER IS 807.3 TORR
  13. math

    The temperature on Saturday was -4 degrees Fahrenhit.The temperature on sunday was 9 degrees warmer than the temperature on Saturday.Was the temperature in degrees Fahrenhit positive or negative explain,
  14. german

    1. Ich ___ warmes Wetter gern. ( 2 points ) A. bist B. habe C. bin D. hat 2. Wur ___ Sport gern. ( 2 points ) A. habe B. habt C. hast D. haben 3. ___ du Schnee gern? ( 2 points ) A. hast B. haben C. hat D. habt 4. Herr Barker ___ Amerikaner. ( 2 points ) A. sind B. ist C. seid...
  15. corrected LA

    if your wrong let me know I don't want to fail
  16. American Government

    1d 2a 3d 4b 5c 6a 7b 8b 9a 10 d 11 b 12 c 13 c 14 c 15 b 16 d Lesson 10 unit 8 Have a amazing day : )
  17. social studies

    they are mountains
  18. social studies

    The types of crops grown by farms in the Andes is influenced in large part by A. elevation. B. latitude. C. longitude. D. pampas.
  19. Science HELP

    Although the Amazon Basin receives more than 80 inches of rain per year, South America also has the driest place on Earth, known as A. Death Valley. B. Gobi Desert. C. Atacama Desert. D. the Caribbean.
  20. geometry

    apply the transformation m to the triangle with the given vertices. name the coordinates of the image points. identify and describe the transformation m: (x, y) -> (1.5x, 1.5y) l(-1, 4), m(-4, 4), n(-4, 3)
  21. Math

    Which of these is a step in constructing and inscribed regular hexagon using technology? Create circle B with radius AB. Draw line FG. Draw point E anywhere on segment DB. Mark the points of intersection between circle A and line AB.
  22. Science

  23. Math

    How to use the hundredths grids to subtract 1.65-0.98
  24. algebra

  25. math

    On average, the earth is 93 million miles away from the center of the sun. The complete revolution around the sun takes 1 year. how fast is the earth moving in this orbit in feet per second?
  26. PreCal

    a car went 44 feet through an intersection in only 0.5 seconds. How fast was the car going in miles per hour?
  27. PreCal

    On average, the earth in 93 million miles away from the center of the sun. a.) assuming that the earth's orbit is circular, estimate the number of miles our planet travels in one complete revolution around the sun.
  28. algebra

    1. simplify the rational expression by rationalizing the denominator? 4 over sqrt 150 __________________ sqrt 189x
  29. Algebra B

    1. simplify the rational expression by rationalizing the denominator? 4 over sqrt 150 __________________ sqrt 189x
  30. Chemistry

    The half life of a radioactive material is 120 months. How much of this material will be left after 350 months if the initial concentration is 2.40M?
  31. Science

    The periodic table is arranged according to several trends. Which of the following is true as you move from left to right along the periodic table: A the element's atomic mass decreases and the atomic number increases B the element's productivity increases C the ...
  32. P.E

    Anger is a normal emotion that all humans feel at some time. It is important to express this emotion in a healthy way. Which of these ways of dealing with anger might affect your health in a negative way? A.) Accept your feelings B.) Ignore your triggers C.) Talk about the ...
  33. Accounting

    No idea
  34. Math

    A circle is divided into 20 equal parts. Find the angle measure of one of the parts .
  35. Math

    6 friends share 5 apples equally. How much apple does each friend have?
  36. Social studies

    Is it b
  37. Physics

    Question: A 62 kg astronaut floats outside a 3200 kg spacecraft. She's initially stationary with respect to the spacecraft. Then she pushes against the spacecraft and moves away at .50m/s to the left. I got an answer of .0096kg from doing 62*.50/3200 but that is incorrect...
  38. Science

    Identify six stages of the process of scientific inquiry (scientific method) and explain why the process is not a rigid sequence of steps.
  39. Social studies

  40. Math

    Meghan and Sabrina compared the amount of interest they each earned on their savings accounts. Each had deposited $1000, but Meghan earned $140 interest and Sabrina earned $157.50. Whose savings account had a higher interest rate? Explain.
  41. Math

    Nick borrowed $7150, to be repaired at an annual simple interest rate of 6.25%. How much interest will be due after 5 years? How much will Nick have to repay?
  42. Physics

    A helicopter rises vertically with a constant upward acceleration of 0.40 m/s2 . As it passes an altitude of 20 m, a wrench slips out the door. A) How soon does the wrench hit the ground? B) At what speed does the wrench hit the ground?
  43. Physics

    After solving a difficult physics problem, an excited student throws his book straight up. It leaves his hand at 2.5 m/s from 1.5 m above the ground. A) How much time does it take until the book hits the floor? B) What's its velocity then?
  44. Physics

    You're approaching an intersection at 50 km/h (13.9 m/s ). You see the light turn yellow when you're 35 m from the intersection. Assume a reaction time of 0.6 s before braking begins and a braking acceleration of -3.0 m/s2. A) will you be able to stop at before the ...
  45. Physics

    A stock car starts from rest at time t=0 with velocity (m/s) increasing for 4.0 s , according to the function Vx=1.4t2+1.1t. a) Find the car's velocity at the end of the 4.0 s interval. b) Find the average acceleration for this interval.
  46. Physics

    A car travels a straight road at 140 km/h for 30 min then at 90 km/h for 10 min. It then reverses and goes at 90 km/h for 20 min. a) Find the average velocity for the entire trip. b) Find the average speed for the entire trip.
  47. Physics

    The winner of the Kentucky Derby runs the 1.25-mile race in 2 minutes, 2.0 s. What's the horse's average speed in m/s? A Message from Your Instructor: Velocity refers to the displacement from the initial point to the final point. For the first part, determine where the...
  48. Algebra

    a submarine was cruising at a depth of 1,375 feet. The captain gave an order to climb 450 feet. Compared to sea level , find the depth of the sub
  49. SAT Math

    The function w is defined by w(x)=6+3x. If 4? w(z)=96, what is the value of z? So is w(x)=w(z)?
  50. SAT Math Question?

    Lindsey and Stephen work at a factory. Lindsey can complete one full job in three hours, and Stephen can complete the same job in five hours. If Lindsey and Stephen work together on the job for one hour, then how long, in minutes, will it take Stephen to finish the job himself?
  51. SAT Math

    The correct answer is 3/5, but I don't know how. Thank you!
  52. SAT Math

    All of the students who took chemistry at Groveton High School last year were juniors or seniors, as shown in the table below. If 80% of the students who took chemistry passed, then what fraction of the students in the combined junior and senior classes took chemistry? Class ...
  53. SAT Math

    If m percent of 50 is equal to 20 percent of n, then what is the value of m/n? Thank you!
  54. SAT Math Question?

    Which of the following accurately defines all possible values of p-q if 15?p?30 and 7?q?19? The answer is -4?(p-q)?23, but I'm not sure how. Thank you!
  55. American Government

    Yes! thank you
  56. Math

    There are 12 more girls than boys in the class. 35 % of the class are boys. How many pupils are there in the class?
  57. physics

    an aeroplane has a mass of 15 tonnes. At cruising speed,air flows over the top of it's wing at 150 m/s and under the wing at 120m/s. Calculate the pressure in difference between the top and the bottom of the wing and the surface area underside the wing
  58. Physics

    An object is sliding along a flat surface with an initial speed of 30 m/s. What must the coefficient of kinetic friction be between the object and the surface if the object slides to a stop in 10m? What would be the speed of the object after it had only slide half that distance?
  59. English

  60. English

    There is no need for you to be rude Les. She meant how are we suppsoed to help if you dont give out a list of the stories we had read. Im also in this class.
  61. Chemistry

    One-third cup of vanilla ice cream provides about 145 kcal of energy. A typical adult uses about 195 kcal/hr of energy while walking. If all of the energy in one third of a cup vanilla ice cream were to be burned off by walking, how many minutes would it take for this energy ...
  62. English

    is it A or not?!?
  63. Algebra

    The formula I = PRT where I = Interest, P = principal, R = rate, and T = time is used to calculate the amount of simple interest earned. Solve this formula for T.
  64. History

    In what way was the government of ancient Athens different from that of the United States? A. Athens was direct democracy in which citizens voted on laws themselves B. Athens was an oligarchy ruled by the wealthy members of the council of 5 hundred. C. Athens was a republic in...
  65. Math

    You are buying 4 tickets for a football game on stub hub for tickets are $60 each you have to pay a handling fee of $5 per ticket and a shipping fee of 10 for the entire order How much is or going to cost? How much does each person owe you for their fair share?
  66. Math

    Jay can jump rope at a rate of 8 jumps for every 10 seconds . Find the rate
  67. spanish 2

  68. Maths

    0.5 of peters money is 3.50 how much money has he altogether
  69. math

    If one person can do a job in 60 minutes and another per can do it in 90 minutes, how long will it take them, working together, to do the job?
  70. Physics

    You are testing a car on the Nevada salt flats traveling 85 m/s. Your parachute deploys and you decelerate at 13 m/s^2. How long does it take to come to a complete stop?
  71. Math 6th grade

    Tony owns a personal training business. He makes a total of $500 for every 3 clients he acquires. If Tony is saving to purchase 2,2000 in new equipment , how many clients will he need?
  72. Science

    Hemlocks are a common type of tree in the northern forests of the United States. In studying one forest, a forester noticed that mature hemlocks were abundant but there were very few young hemlocks. She wondered why there were so few young hemlocks. By reading the records that...
  73. Math

    Which equation represents the situation? The sum of three consecutive integers is 36. x+(x+3)+(x+3)=36 x+(x+1)+(x+2)=36 x+(x+2)+(x+4)=36 x+x+x=36
  74. ss

    i mean d
  75. ss

    A. By gaining control of Quebec, the British could increase financial and military support from the colonists.*** B.By gaining control of Quebec, the British would disrupt French supplies from reaching forts further north. C. Without capturing Quebec, the British would have ...
  76. astronomy (check my answer)

    I think it's a, that Regulus is further away than Denebola.
  77. astronomy

    At your telescope, you measure the parallax of the star Regulus to be one-half of the parallax of the star Denebola. What do you immediately know about their relative distance from us? a) That Regulus is further away than Denebola. b) That Regulus is closer than Denebola. c) ...
  78. math

    A popular snack food reduced the amount of sodium in one serving from 700 milligrams to 630 milligrams. What is the percent decrease in the amount of sodium in this snack?
  79. Social Studies Help ASAP

    1. b 2. correct 3. b & c 4. b
  80. Algerbra

    BK--go to the site called openstudy they will actually tell you the answers and help you.
  81. Social Studies (check my answers))

    1. b 2. d
  82. math

    33 pounds of bananas cost $163.50. how much would 18 pounds cost? how much would a one pound banana cost?

    A gumball machine contains 150 gumballs. If the probability of getting a yellow gumball is 1/7, what is the probability of not getting a yellow gumball?

    if one coin is flipped and then a second coin is flipped, what is the probability that both coins land on tails? A) 1/8 B) 1/32 C) 1/16 D) 1/4

    A soda company determines that there is a 3% chance that a soft drink bottle is under filled. If two bottles are selected at random, find the probability that both bottles are under filled

    if a die is tossed and a coin is flipped, what is the probability of getting a number less than five on the die or tails on the coin? (write answer as a fraction in lowest terms)

    A letter is chosen at random from the word mathematics. what is the probability of choosing either a T or an M? A) 4/11 B) 3/11 C) 1/11 D) 2/11

    a bag contains seven red balls numbered 2,4,5,6,7,8,10 and three white balls numbered 1,3, and 9. If a ball is drawn, what is the probability the ball is white or the number on the ball is less than 3? Write your answer as a fraction in lowest terms.

    from a bag containing 6 white balls, 3 black balls and 13 red balls, two balls are drawn at random. what is the probability that they are both red?
  90. Math

    Every 1 1/2 on a wilderness map represents 1 mile. If the actual distance between two likes is 10 miles how far apart are the lakes on the map?
  91. physics

    A reflecting telescope is used to observe two distant point sources that are 3.50 m apart with light of wavelength 600 nm. The telescope's mirror has a radius of 5.0 cm . What is the maximum distance in meters at which the two sources may be distinguished?
  92. CHEM 2: Boiling Point

    Which Aqueous solution has the highest normal boiling point? a.) 0.1 m NaCl b.) 0.1 m C2H5OH c.) 0.1 m CaCl2 d.) They all have the same boiling point. I think that the answer is D, the all have the same boiling point. Is this correct? Because Delta T= K(b)msolute .... and if ...
  93. CHEM 2 Question

    For A+2B <---> 2C : K=2.23 For 2C <---> D : K=0.27 What is the value of the equilibrium constant for the reaction: 2D <---> 2A + 4B ? I calculated it and got this: k=(k1)(k2) =(2.23)(.27)=0.6021 =(1/0.6021)=1.67 =(1.67)^2= 2.76 Is this answer correct? I am ...
  94. Science Chemistry

    So the answer is: 43.78 / 46.068 = 0.929 M?
  95. Science Chemistry

    A sample of beer is 4.6% by Mass C2H5OH. The density of beer is 0.93 g/mL. What is the molar concentration of C2H5OH in this sample of beer?
  96. Algebra

  97. science

    the answer is D. I just took the test and got it right
  98. Math

    Don't trust the person "helping you" at all . They are a lier!!!
  99. math

    Math star . What are the answers?
  100. Chemistry

    What is osmolarity of a 0.20M MgSO4 solution, which is 50% dissociated?
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