Questions Asked on
November 12, 2016

  1. chemistry

    If 200. mg of fluorine-18 is shipped at 7:00 A.M., how many milligrams of the radioisotope are still active when the sample arrives at the radiology laboratory at 4:10 P.M.?

    asked by Jae
  2. Physics

    A car is traveling at 7.0 m/s when the driver applies the brakes. The car moves 1.5 m before it comes to a complete stop. If the car had been moving at 14 m/s, how far would it have continued to move after the brakes were applied? Assume the braking force

    asked by Kayla
  3. Physical Science

    A 68.4-g sample of potassium chloride was added to 200.0 g of water at 20 C. Is the solution saturated, unsaturated, or supersaturated?

    asked by Steve
  4. Maths

    Given that 3^9 + 3^12 + 3^15 + 3^n is a perfect cube number. Calculate the value of n.

    asked by Help
  5. Math

    If the weight of a class 4 truck is increased by 2 tons will it still be classified as a class 4 truck

    asked by Cristal
  6. Chemistry

    Copper (I) chloride, CuCL, has Ksp = 1.9 x 10^ -7.calculate the molar solubility of CuCL in A)pure water, B)0.0200M HCl solution C) 0.200M HCl solution, and d) 0.150M CaCl2 solution. I used the ice table and for a) i got 0.000435 M sort of lost for the

    asked by priya
  7. Goverment

    list the advantages and disadvantages of confederal system of government

    asked by Angelflora
  8. Math

    A manchine prints 1500 newspaper in 45 minutes . How many will it print in 2 hours solution?

    asked by Sandhya Pandey
  9. Math

    Yuki has a ribbon that is 11 1/4 feet long. She divides it into pieces that are each 1 7/8 feet long. She uses three pieces to make a bow. How many bows can she make in all?

    asked by Ashani
  10. Help SS!

    In what ways were Federalists and Democratic Republicans similar? Both believed in promoting trade. Both had plans for a national bank. Both were strong supporters of the free market. Both were strong supporters of the Constitution. **??

    asked by Stampy
  11. Calculus

    A ladder a = 20 feet long is leaning against the wall of a house. The base of the ladder is pulled away from the wall at a rate of b = 4 feet/second. Consider the triangle formed by the side of the house, the ladder, and the ground. Find the rate at which

    asked by Anonymous
  12. Math

    select each situation in which one quantity at a constant rate in relation to another quantity. A. Brad drives 45 miles per hour. B. Frank earns 3% interest on his savings account C. Steve doubles the amount of water he drinks every week. D. Dan earns $12

    asked by Blub
  13. Maths

    Evaluate : 20142015×20152014 – 20142014 ×20152015

    asked by Shal
  14. Math

    an individual has purchased 275000 worth of savings certificates. Certificates expires in 25 years and a simple interest rate is computed quarterly at 3%per quarter. Interest checques are mailed to certificates holders ever 3 months. The interest the

    asked by Shahzaib
  15. Physics

    Imagine you are driving a car up Pike’s Peak in Colorado. To raise a car weighing 1000 kilograms a distance of 100 meters would require about a million joules. You could raise a car 12.5 kilometers with the energy in a gallon of gas (if all stored

    asked by JAY
  16. Government

    Which of the following statements about congress is not true? a.) in the senate, seniority still plays a role as to who is appointed committee chairpeople b.) in the house, rules on debate are more restrictive than in the senate c.) senators have more

    asked by Raichel
  17. maths help plz&plz

    The 79 members of a spot club play at least one of the following games Tennis, Football and Volleyball. 19 play Football & Volleyball and 29 play Tennis & Volleyball, n play all the three games. 2n people , each play only one game. How many play Volleyball

    asked by Anonymous
  18. maths

    a ships leaves port R, sails to S and then to port T. the bearing from R is 112, the bearing of T from S is 33 and the distance is 75km and the distance RS is 56. a) draw the diagram showing the journey of the ship from R to T. showing on your diagram i

    asked by sheniel
  19. Math (Algebra)

    A chemistry student needs to make 60 liters of a 30% alcohol solution. He has a 20% alcohol solution and a 40% alcohol solution in the lab. How many liters of each strength does he need to mix together *The system of equations I did was: a+b=60 &

    asked by Amber
  20. physics

    a uniform wooden beam 10 m long ang weighting 200 N is used to support a load of 300 N on the left end , and 500 N on the right end. Determine the center of the gravity if another load of 80 N is 2 m from the left end

    asked by angelan
  21. Math

    For every 5 highlighters that Agnes buys , she gets 1 free. If Agnes needs 80 highlighters, what is the least number of highlighters she has to buy?

    asked by Karen
  22. Geometry

    In Parallelogram PARK, angle P = (7x) degree angle A = (3x - 20) degree angle K = (5y - 10) degree. What is x + y?

    asked by Angel
  23. 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

    asked by Kay
  24. Math

    Alvin has some marbles in a box. He keeps 1/3 of them and gives the remainder to Joyce and Sean. Joyce gets 5/8 of the remainder. What fraction of the marbles does Sean get?

    asked by David
  25. Algebra

    An object is dropped from a bridge. Find the distance the object has fallen when the speed reaches 60ft/s. Use the equation v=square root 64d, where v is the speed in feet per second and d is the distance in feet

    asked by Anonymous
  26. College algebra

    Sample of 500gms radioactive substance decays according to the function A(t)-500-0.044t where t is the time in years. How much of the substance will be left in the sample after 20 years?round to the nearest whole gram

    asked by Deborah
  27. Chemistry

    How many Cu+2 ions are in 5.33 mol of CuCl2? I did this so far: n-> 5.33 mol Ncu-> ? ions M= 134.45 g =5.33 mol x (602x10^23 ions/ 1 mol) =3.21x10^24 ions

    asked by Sunny
  28. math

    the square root of 5 less than 6 times a certain number is divided by the number and the quotient is 1.Find the number

    asked by Sofia

    To pull a car out of a ditch, one end of the rope POR is tied around a pillar at P and the other end is tied to the car at R. A force of 100N is applied to the Center O of the rope and perpendicular to PR. find the tensions in the rope if the angle POR =

    asked by Anonymous
  30. Physics

    A child pushes a wagon with a passenger of total mass 42 kg along a horizontal surface as fast as the child can run, and then releases the wagon, which continues for another 16 m before stopping. The coefficient of kinetic friction acting to slow the wagon

    asked by Jatin
  31. Math

    determine whether the graphs of the following equations are parallel or perpendicular y=2/3x + 3, y=3/2x, 2x-3y=8

    asked by JJ
  32. Science

    Can resultant magnitude of two vectors be smaller than the magnitude of either vector?

    asked by Aashna Chapagain

    Heat transfer Q and work done W are always energy in transit, whereas internal energy E is energy stored in a system. Give an example of each type of energy, and state specifically how it is either in transit or resides in a system.

    asked by JAY
  34. Maths

    The angle of elevation of the top of a tower from a point 42m away from its base on level ground is 36°. Find the height of the tower

    asked by Andrea
  35. math

    Mom has 2 apples and 3 bananas. Every morning for 5 days she is going to give her son an apple or a banana. What is the probability that the boy will get a banana at least two days in a row during these five days?

    asked by allie
  36. Math- HELP!

    If a population of fruit flies doubles every 3 days. What is k, the proportionality constant? How would I solve this problem? What would initial value be?? Thanks!

    asked by Ellie
  37. Business Math

    An investor has $ 500000 to spend. There investments are being considered, each having an expected annual interest rate. The interest rates are 15, 10 & 18 percent respectively. The investor`s goal is an average return of 15 percent in the three

    asked by Abdul
  38. Maths

    Evaluate: 5 + 8 + 11 + 14 + … … +395 + 398.

    asked by Joker
  39. Math

    A bus holds 32 passengers. 150 people want to go on a bus trip. How many buses are needed? And how many empty seats are there?

    asked by Charlotte
  40. maths too hard help

    At a conference of 100 people. There are 29 india women and 23 india men. Of these india people 4 are doctors and 24 are either men or doctors . There are no foreign doctors. How many women doctors are attending the conference step pl

    asked by fui
  41. Chemistry

    How many mL of acetone are required to make a 8.42 % v/v aqueous solution in a 300 mL volumetric flask?

    asked by Hannah
  42. Math

    The ratio of band students to choir students at Waldon is 75 to 30. What is the fraction of band students?

    asked by Jo jo
  43. statistics

    there are 7 blue socks,5 red socks,3 green socks and 4 yellow socks in a drawer. 1.find the sample space many socks should I take out without looking to get a pair of socks 3.what is the probability that the first socks that I draw is red 4.what is

    asked by varghese
  44. chemistry

    what volume of a 0.20M potassium sulfate solution contains 57g potassium sulfate?

    asked by jen
  45. Physics - Energy

    An airplane is flying with a speed of 250km/h at a height of 3610m above the ground. A parachutist whose mass is 75.2kg, jumps out of the airplane, opens the parachute and then lands on the ground with a speed of 3.75m/s . How much energy was dissipated on

    asked by Kidd
  46. Biology

    Which of the following best describes the genotypes of the offspring when Mendel crossed true-breeding (pure-breeding) yellow seed plants with true-breeding green seed plants? A) The offspring had a combination of yellow and green seeds. B) The offspring

    asked by HELP ME!!!!!!
  47. chemistry

    calculate what volume of sulfuric acid solution(specific gravity=1.07;and containing 10%sulfuric acid by mass)contains 18.50g of pure sulfuric acid at a temperature of 25 Celsius.

    asked by jen
  48. math

    A basketball player had scored 865 points in 31 games. What was the rate in points per​ game?

    asked by dion
  49. Maths

    Asmo is putting some ping pong balls into 10 boxes. In each of the boxes, number of ping pong balls shall not be less than 11, not equal to 17 and is not the multiple of 6. If the number of ping pong balls are different in each box, at least how many ping

    asked by Vault boy
  50. Algebra

    A man drives from city to village a distance of 48 km ,in 45 minutes. Where the road surface is good , he drives at 72 km/hr and where it is bad , at 48 km/hr. Find the number of kilometres of good surface. (Form an algebraic equation and solve it).

    asked by Zia
  51. Material mechanics

    following data was obtained from a tensile test of steel. The test specimen was 15mm in diameter and 50 mm in length Load (kN) Elongation(mm) 5 0.005 10 0.015 30 o.048 50 0.084 60 0.102 64.5 0.109 67 0.119 68 0.137 69 0.160 70 0.229 72 0.300 76 0.424 84

    asked by Ali
  52. Math

    Kerri's father bill was a baker. Out of his usual morning batch of cookies bill burned the first 2 dozen cookies. He gave half of what was left to Keri to take to school. He wrapped up half of the remaining cookies and have them to a group of fireman. He

    asked by Jessica
  53. Chemistry

    What is the minimum volume of 2.00 M hydrochloric acid necessary to neutralize completely the hydroxide in 800.0 mL of 0.3 M calcium hydroxide?

    asked by Kim
  54. Math

    a rental car company charges a fee based of $44.82 plus $0.55 per mile driven. If x represents the miles driven, write an equation that could be used to find y, the total cost of the bill. My answer(s): 0.55 + x = y 0.55(x) = y X + 0.55 = y 44.82 + x = y

    asked by Blub
  55. chem

    At 25ºC and 1 atmosphere the following equilibrium is eatablished : 2NO (g) N2O4 (g) The partial equilibrium pressure of N2O4 is 0.7 atm. A) calculate Kp of the above system at 25ºC. B) calculate the partial pressure of the above two gases at equilibrium

    asked by angy
  56. chemistry

    the word "proof" on alcoholic beverages is defined as twice the percentage by volume. How many ml of alcohol are in a one-liter bottle of 80-proof gin?

    asked by jen
  57. English

    1. I will guide you around today. 2. I will guide you round today. 3. I will guide you about today. ----------------------------- Are they all the same? ======================= Does #1 mean #4, 5, or 6? 4. I will guide you here and there today. 5. I will

    asked by rfvv
  58. Physics

    A 125-g arrow is shot vertically upward with an initial speed of 28 m/s. Assuming 30% loss in total mechanical energy while ascending, what maximum height above the position from which it was shot does the arrow reach?

    asked by Matt
  59. math

    A soccer goalie has saved 7 goals out of 10 shots. How many goals will she likely let in on 100 shots?

    asked by srikar
  60. English

    1. That's fine with me. (Does 'with' mean 'being related to'?) 2. It's raining much. 3. It's raining a lot. 4. It's raining hard. 5. It's raining heavily. 6. It's raining cats and dogs. (Are they all the same in meaning? Can we use 'much' instead of 'a

    asked by rfvv
  61. Math

    A machine prints 1500 newspaper in45 min . How many will print in 2 hours ?

    asked by Anonymous
  62. Math

    At the market, 0.2 of the pieces of fruit are peaches, 0.25 is apples, 0.05 is lemons, 0.1 is cherries, 0.2 is grapes, and 0.15 is plums. There are also 8 pineapples and 4 mangos. How many peaches are for sale at the market? How many apples? How many

    asked by David
  63. urgent math

    Paul is standing on a 39 m high building. The angle of elevation to the top of a taller building is 47 degrees and the angle of depression to the bottom of the same building is 36 degrees. What is the height of the taller building to the nearest tenth.

    asked by Sarah
  64. Math

    In a standard set of dominoes, a face of each domino has a line through the center, with 0 to 6 dots on each side of the line. Each possible combination of dots is used exactly once, one combination per domino. What is the probability that a randomly

    asked by Alyssa
  65. English

    1. I will be a musician one day. 2. I will be a musician some day. (Which one is correct? Are both OK? Then which one is commonly used?) 3. She is putting on cosmetics on her face. 4. She is wearing cosmetics on her face. 5. She is puting on makeup on her

    asked by rfvv
  66. math

    if jake can ride his bike to the store that is 20 miles away in 45 minutes how far can he bike i i hr

    asked by hgfhgfh
  67. Math

    The sum of real values of k for which the cubic x^3-kx+k-1=0 has exactly tho distinct real solution.

    asked by Nikhil
  68. Trigonometry

    If Sin Teta =3/5.Find Tan Teta For Teta Degree

    asked by Ikechukwu
  69. maths help sir steve

    sir steve what about these i just solved it now i didnt get it if x^2+2xy+3y^2=1 prove that (x+3y)^3d^2y/dx^2+2(x^2+2xy+3y^2)=0 i solve with implicit derivative like these 2x+2(xdy/dx+y)+6ydy/dx=0 2x+2xdy/dx+2y+6ydy/dx=0 2xdy/dx+6ydy/dx=-2y-2x

    asked by practising and need help
  70. chemistry

    how many grams of potassium nitrate are needed to prepare 250.0ml of a 0.03M potassium nitrate solution?

    asked by jen
  71. science

    what is the animal that can sleep by his backbone in the world?

    asked by teferi olana
  72. Math

    Directions are "Order these integer decimals from least to greatest: +.125, -.1428, -0.025 (with a repeating 5), 0.2. I'm thinking that ordering from least to greatest would be: -.1428, -0.025, .125, 0.20

    asked by paula
  73. Accounting

    Rented an office and paid three months rent in advance to property Management check #001 $4,500. How would this journal entry be posted to the general journal.

    asked by Maria
  74. Math

    Jack and John have heights in the ratio 5:6. If John's height is 186cm, what is Jack's height?

    asked by Oli
  75. Maths

    Ten students sit a test consisting of 20 questions. Two students get 8 questions correct and one student gets 9 questions correct. The remaining seven students all get at least 10 questions correct and the average number of questions answered correctly by

    asked by AMT help
  76. mathematics

    a fraction is such that the denominator exceeds the numerator by 3.if both the numerator and numerator are reduced by 2,the fraction is decreased by 1/8.find the fraction

    asked by Isaiah
  77. math- Trigonometry

    A wire is attached to a cell phone tower at Sunshine Village. The wire is 15.6m in length, and the angle of elevation is 54°. What is the distance between the wire and the base of the cell phone tower, along the ground, correct to the nearest tenth of a

    asked by Emily
  78. maths

    sir steve plz am a little confuse (x-y)³=A(x+y) prove that (2x+y)dy/dx=x+2y if y is a function of x and x=e^t/(e^t+1) show that dy/dt=x(1-x)dy/dx plz explain to me very well sir damon answered that but i still dont get it If u want me to show my work i

    asked by practising and need help
  79. L'Hospital's Rule and Indeterminate Forms

    I understand LHR can be applied to limits of the indeterminate form 0/0 and inf/inf. However, can it be applied to the other indeterminate forms of 1^inf, inf-inf, inf^0, 0^inf, and inf*inf?

    asked by Tim
  80. math

    From the whole numbers 1 to 100, how many cannot be divided by 6 or 9?

    asked by Dran
  81. physics

    Rain drops do not accelerate for long terminal speed due to the vicious drag of the air.if this did not happen rain drop would hit us with a dangerous high speed.discuss

    asked by ameen
  82. math

    -(-2)^3+0.2-/2-11/-4=-5 How to show work for the answer -5

    asked by Tricia
  83. math

    there are 63 animals. 2 are horses .there 5 more chickens than 3 times the pigs. there are 2 less chickens than half pigs times 7

    asked by firn
  84. math

    By how much does 17 exceed the difference of 5 and -5?

    asked by Alex
  85. Math Word Problems

    Bart, Lisa and Maggie went to the "Integers Only Really Expensive Fruit Stand" to buy some fruit. Bart bought 2 pomegranates and 1 kiwi for exactly $16. Lisa bought one pomegranate and 2 kiwis for exactly $11. Maggie bought 1 pomegranate and 1 kiwi. How

    asked by Anonymous
  86. Math

    Aaron and Ben have a total of 976 trading cards. Ben has 7 times as many cards as Aaron. How many cards should Ben give Aaron so that Aaron will have 3 times as many cards as Ben?

    asked by Karen
  87. chemistry

    how much solute are present in a solution that contains 100.0g of water, and is 9.0% by weight sodium bicarbonate?

    asked by jen
  88. math

    x + 2y= -2 y= -2x-13

    asked by dashawn
  89. math

    (x-1)+(x-2)+ ...+(x-10)=0 Find the answer?

    asked by ela
  90. math

    which of the following is a Pythagorean triple and why A:8,3,6 B:13,12,5

    asked by dude
  91. Geometry

    In Parallelogram PARK, angle P = (7x) degree angle A = (3x - 20) degree angle K = (5y - 10) degree. What is x + y?

    asked by Anonymous
  92. Math

    Order the numbers GREATEST to LEAST. 6.5, 31/5, √40, 6.6 My answer: 6.6, 6.5, √40, 31/5 (6.5 is a repeating decimal btw)

    asked by Blub
  93. Math

    How could Jason solve for T in this equation? T - 8 = 40 A) add 8 to the left side B) add 8 to the left side and subtract 8 from the right side C) add 8 to each side D) divide each side by 8

    asked by David
  94. Math

    One-quarter of Steve's baseball cards are from his dad's collection. Another 0.2 are from his uncle, and 0.5 are from his brother. The rest are from Steve's cousin. Thirty of the cards from his cousin are National League players; the other half are

    asked by David
  95. math

    My average in AP world history is a 90, The weight on the class is 1.10% with the weight, whats my average?

    asked by Tom
  96. Math

    What is the solution to (4 x 10^3) x (6 x 10^6) written in scientific notation? 24 x 10^9 2.4 x 10^9 24 x 10^18 2.4 x 10^10

    asked by Cody
  97. Linear Algebra

    Let v1 = (1, 0, −1) v2 = (0, 2, 2) v3 = (−3, 4, 7) and let W = Span{v1, v2, v3}. Show that W = Span{v1, v2}? How would I go by doing this? Thanks in advance.

    asked by Zabe
  98. physics

    What is the kinetic energy gained by a 500kg car accelerating from rest to 27m/s? 1/2=mv^2 > 1/2(500)(27m/s)^2= 182,250J a. What is the power output in watts of the engine that causes this acceleration in 4.00s? 27m/s*4s= 108m/s^2 1/2(500)(108)= 27,000

    asked by JAY
  99. Calculus

    Suppose that f(x+h)-f(x) =-4 h x^2 - 1 h x + 4 h^2 x + 3 h^2 -3 h^3. Find: f^1(x)

    asked by Amy
  100. math

    Two-third of a number is 72 less than its 120%.What is the product of the digits of the number?

    asked by Divya Mallick
  101. Math

    In a class where there are as many girls as boys, 2/5 of the boys and 1/2 of the girls went to a local fair. What fraction of the students in the class did not go to the local fair?

    asked by David
  102. computer

    A square with each side 70 long.

    asked by yashdeep
  103. maths

    mary is now three times as old as susan. Three years ago,the sum of their ages was 22. how old is susan now

    asked by Anonymous
  104. Math

    What should Edna do to solve for m in the equation? 65 = m + 29 A) add 29 to each side B) add 29 to the left side C) subtract 29 from the right side D) subtract 29 from each side

    asked by David
  105. maths sir steve plz reiny plz sir damon plz help

    express 1.1 in surd form pllllllz

    asked by Anonymous
  106. Linear Algebra

    Let B be the set of vectors in R^3 given by B = (1, 1, 0) , (1, 1, 1) , (0, 1, −1). 1. For x = (x1, x2, x3)^T a vector in R^3, find the scalars c1, c2, c3 (that will depend on x1, x2, x3) such that x = c1(1, 1, 1) + c2(1, 1, 1) + c3(0, 1, −1) Can

    asked by CSCE
  107. Math

    What is the first common number among: palindromic numbers, Triangular numbers and Fibonacci numbers?

    asked by Adam
  108. Math

    simplify ratio 1/5:1=

    asked by Dorce
  109. science

    Who is the father of computer?

    asked by Anonymous
  110. maths sir steve plz reiny plz sir damon plz help

    express 1.1 in surd form pllllllz step

    asked by Anonymous
  111. Material mechanics

    A flat plate specimen of a soft metal alloy is to be tested by pulling on round pins inserted through the ends of the plate, as illustrated below (a) Calculate the required diameter of the pins, given that the plate is 8.0 mm thick, the maximum tensile

    asked by Ali
  112. math

    find the 8th term in the expension of [(x)^1/2 +2/(x)^1/2]^12

    asked by shahzeb
  113. math


    asked by dona
  114. Biochemistry

    How does acetyl coA get out of the mitomatrix and into the cytoplasm? If you could explain this process, or reference me to a good picture or graphic of this process I would greatly appreciate it! Thank you so much for your help!

    asked by Student
  115. Science

    In many country celcius scales are used give reasons

    asked by Anonymous
  116. Maths

    If Sin X=4/5.Find Cos X Where X

    asked by Ikechukwu
  117. Linear Algebra

    Let v1 = (1, 0, −1) v2 = (0, 2, 2) v3 = (−3, 4, 7) and let W = Span{v1, v2, v3}. What is the dimension of W? Is it 2? Any explanation would be great too. Thanks.

    asked by Zabe
  118. English

    1. On the way to Dokdo(small island), it was so windy that I got sick. -------------------------- Does 'got sick' mean 'became ill' or 'became seasick'?

    asked by rfvv
  119. satistics

    What is t? What is r2? n = 25 MD 4.7 s2 = 64

    asked by Tracy