# Questions Asked onMarch 18, 2017

1. ## math

Mrs. Morton has a special reward system for her class. When all her students behave well, she rewards them by putting 333 marbles into a marble jar. When the jar has 100100100 marbles or more, the class has a party. Right now, the jar contains 242424

2. ## Science

Two point charges q1=4uc& q2=9uc are placed 20cm apart.the electric field due to them will be zero on the line joining them at a distance of

3. ## Math 120

A city council consists of eight Democrats and seven Republicans. If a committee of six people is​ selected, find the probability of selecting three Democrats and three Republicans.

4. ## Chem

What is the least number of carbon atoms, in a non-cyclic alkane molecule that has a chiral centre.

5. ## Science

The linear magnification produced by a spherical mirror is -1.Analysing this value state the type of the mirror and position of the object with respect to the pole of the mirror. Draw the ray diagram to justify your answer.

6. ## Math

The Angle Of Depression Of the Top And The Foot Of A flag Pole As Seen From The Top Of A buildings 145 Meters Away Are 26Dgree And 34Dgree Respectively. Find The Heights Of The Pole And The Buildings.

7. ## Algebra

can somebody please help me with this question I've spent more than 3 hours on this, still nothing Let L1 be the line passing through the point P1=(2, −4, −6) with direction vector →d1=[1, 0, 2]T, and let L2 be the line passing through the point

8. ## physics

Two Children,A and B, fire identical 10g ball bearing from a catapult. The elastic band of each catapult is elastically extended by 0.10m and then released to fire a the ball bearings. Child A's elastic band has a spring constant of 144 N/m. Calculate the

9. ## Linear algebra

Let L1 be the line passing through the point P1=(−1, −1, 8) with direction vector →d1=[1, 0, −3], and let L2 be the line passing through the point P2=(7, −11, 14) with direction vector →d2=[1, 2, −3]. Find the shortest distance d between

10. ## Chemistry

The enthalpy of combustion of butane C4H10 is described by the reaction: C4H10(g) + (13/2) O2(g) -> 4CO2(g) + 5H2O(g) ΔH°rxn = –2613 kJ/mol Given the following enthalpies of formation: ΔH°f[CO2(g)] = -393.5 kJ/mol ΔH°f[H2O(g)] = -241.8 kJ/mol

11. ## math

The tires mary wants to buy for her car cost \$200 per tire. A store is offering the following deal: Buy 3 tires et the 4th tire for 75% off ! Mary will buy 4 tires using the deal . The sales tax is 8%. how much will mary save using the deal versus paying

12. ## Biology

The gene for red hair is recessive to the gene for black hair.What will be the hair colour of a child if he inherits a gene for red colour from his mother and a gene of black hair from his father?Express with the help of a flow chart..if you can..otherwise

13. ## biochemistry

What is the concentration of H+ in a solution of 0.2 M NaOH? i got [H+] = 5x10^-14, is this correct? all i did was [H+][OH-] = Kw

14. ## chemistry

Under the same condition temperature and pressure hydrogen diffuses 8 times as fast as gas y calculate the rmm of gas y the rmm of h=2

15. ## statistics

Find the third quartile Q3 of the list of 24 sorted values shown below. 30 32 33 34 37 37 40 42 43 48 49 50 50 52 57 59 60 61 63 65 67 71 72 7430 32 33 34 37 37 40 42 43 48 49 50 50 52 57 59 60 61 63 65 67 71 72 74

16. ## science

2 lenses in contact of power 3D and -5D form a composite lens. An object is placed around a distance 50 cm from this composite lens,find the position of the image.

17. ## physics 1

) An oil tanker’s engines have broken down, and the wind is blowing the tanker straight toward a reef at a constant speed of 1.5 m/s (Fig.1). When the tanker is 500 m from the reef, the wind dies down just as the engineer gets the engines going again.

A carnot’s engine with air as working substance is initially at 3270C and pressure of 12 atmospheres. The volume is one litre to start with. The expansion or compression ratio is 1:6. Find the lowest temperature and efficiency. (γ= 1.4)

19. ## Maths

What is the probability of a question (mcq)you are writing now to get 1 Mark out of it.

A machine was purchased with money borrowed from the bank at a cost of k50000.00 which is expected to last for 6 years and depreciated at 12.5% per 6,the depreciated value and the accumulated interest for year two (2)year (6) .The first calculation has

21. ## Pre calc

The general function P(t)= 640ekt is used to model a dying bird population, where Po = 640 is the initial population and t is time measured in days. Suppose the bird population was reduced to one quarter of its initial size after 9 days. How long will it

22. ## Physics

4. Two vehicles of equal mass collide at a 90° degree intersection. If the momentum of vehicle A is 1.20x10^5 kg km/h east and the momentum of vehicle B is 8.50x10^4 kg km/h north, what is the resulting momentum of the final mass?

23. ## Educational Technology

Of the following websites, the least trustworthy is the one that: A: Has the author's name and the current year as the date the site was posted. B: Has in-depth information and has a .gov URL. C: Has photographs and a copyright date of 1997. D: Has a

24. ## Chemistry

1)What is the pH of a 0.25 M solution of acetate (CH3COO-) with a pKa of 4.76? 2)If the [OH] of a solution is 2.95 x 10-5M, what is the pH of the solution? 3)Determine the pH at the equivalence point when 25.00 mL of 0.1056 M CH3COOH is titrated with

25. ## Chemistry

What mass of ammonia is necessary to produce 500 kJ of heat? 4 NH3(g) + 5 O2(g) → 4 NO(g) + 6 H2O(g) ΔrH = -906 kJ mol-1

26. ## science

While conducting the experiment to measure the weight of water displaced by the body precaution should be taken to immerse the solid in water without touching the walls or bottom of the container. Why?

27. ## math

The tires mary wants to buy for her car cost \$200 per tire. A store is offering the following deal: Buy 3 tires et the 4th tire for 75% off ! Mary will buy 4 tires using the deal . The sales tax is 8%. how much will mary save using the deal versus paying

28. ## Trigonometry

10. Rewrite 2tan 23° / 1 - tan223° as a single function of an angle. I'd appreciate it if someone could help me out with this question! Don't just give me the answer though, please and thank you!

29. ## Physics

3. Two vehicles collide at a 90 degree intersection. If the momentum of vehicle A is 6.10 x10^5 kg km/h south and the momentum of vehicle B is 7.20 x 10^5 kg km/h east, what is the magnitude of the resulting momentum of the final mass?

30. ## calculs

Find the volume when the plane area bounded by y=-x^2-3x+6 and x+y-3=0 is revolved about (1) x=3 and (2) about y=o B. Find the volu6 of focus generated by revolving the circule x^2+y^2=4 about the line x=3

31. ## ALGEBRA

An aircraft factory manufactures airplane engines. The unit cost C (the cost in dollars to make each airplane engine) depends on the number of engines made. If x engines are made, then the unit cost is given by the function =Cx+−0.2x248x21,748 . What is

32. ## Biology

Why does our fingers have a number of hinge joints rather than one or two?

33. ## American Government

As the country has grown and evolved, so too has the Executive Office of the President and the independent agencies. Give FOUR specific examples demonstrating how the evolution of the executive branch has mirrored the evolution of the nation. Include at

34. ## Human resource

Suppose you are a staff nurse in a hospital that uses an incentive compensation system. Do you have an obligation to disclose the nature of the compensation arrangement to patients? if so, how should this information be communicating, and by whom?

35. ## math

Translate one less than the quotient of a number and -5

36. ## math

A bank account was opened with a deposit of \$2750 at an APR of 3.5% compounded one of the following ways. Find the amount in this account after 6 years with compounding of: (round answers to nearest 100th) annually: \$ semi-annually: \$ quarterly: \$ monthly:

37. ## College Algebra

What would be an extraneous solution to the equation 4/(x+7) +3 = -2/13

38. ## English

Write the correct form of the word. His ____ made him the perfect victim for the con man's scheme. (credulous) Choices: credulous, credulity, or credulousness Answer: credulity

39. ## math

A block of wood is in the form of cube whose edge is 3 metre how many rectangular pieces of size 30×20×15cm can be cut from the block

40. ## social studies

In Medieval Europe areas like England, France, the Papal States, the Holy Roman Empire, and the Byzantine Empire had a different leader. Why do you think Europe had no single government during the Middle Ages? So I was kind of thinking that maybe it was

41. ## Science

Mass of iron cube having edge length 1.8m is 70g.Find it's density.

42. ## Maths Trig

A 60m long bridge has an opening in the middle and both sides open up to let boats pass underneath. The two parts of the bridge floor rise up to a height of 18 m. Through what angle do they move?

43. ## Maths

How many 0.75litre bottles of water will Jim fill from a 20litre bucket in order to empty the bucket?

44. ## East Asia Politics

I am writing a research paper on China's One Child Policy and do not know what angle I should approach my thesis statement. Any thoughts as to what I can focus on with this paper? It has to be 7 pages long. Thanks for your thoughts!

45. ## algebra

Please, Completely factor 5c^2-24cd-5d^2 Thank so much

46. ## math

Write a related addition sentence 26-24=2

47. ## History

In Asia and the Americans identify whether political, social, or economic interests were the main motivation for imperialist nations in both regions. Use two examples for each region. I don't want you write it for me I just want to know if there is a site

48. ## Maths

At present what you are answering my question ,what is the probability of getting 1 out of 1 marks

49. ## science

A ball is projected vertucally upward from ground with avelocity of 20m/s .How high willit go.a 5m b10m c15m d20m e25m correct options of this question.

50. ## Calculus

What are the dimensions of a rectangular field of area A that requires the least amount of fencing?

51. ## science

A ball is projected vertucally upward from ground with avelocity of 20m/s .How high willit go.a 5m b10m c15m d20m e25m correct options of this question.

52. ## maths

(p+(pq^2)^1/3+(p^2q)1/3)/p-q*(1-q1/3/p1/3)

53. ## College Algerbra

the value of a particular investment follows a pattern of exponential growth. In the year 2000, you invested money in a money market account. The value of your investment t years after 2000 is given by the exponential growth model A = 1600e^(0.052t). By

54. ## math

£25 per month is invesed in a fund for a year and attract intrest of 10.5% compounded monthly. How much is the fund worth at the end of the year

55. ## science

If two balls made of iron and aluminium of equal volumes are immersed in a liquid then will they experience equal up thrust? Justify your answer.

56. ## Physics

A spaceship travels through space at a constant velocity of 3.00 x 10^2 m/s. What is the net force acting on the spaceship?

57. ## science

If eye color is determined by 4 possible genetic combinations,RR-Brown/RL-Brown/LR-Brown/LL-Blue,what percent of the possible genetic combinations are carriers for the Blue-eyed offspring?

58. ## math

A cargo ship can carry containers weighing up to 50,000 tonnes. If it costs £1 million to rent out the entire space on this ship, how much will it cost if I want to rent out 3/5 of the entire space? How many tonnes of space do the firm have left to sell

59. ## 9th Math

Find the length of a side and the perimeters of a regular nine sidedpolygon with radius 5 units.

60. ## Chemistry

Given below is a reaction 2Mg+O2 = 2MgO Mass of magnesium oxide formed by buring 24g of magnesium in air is a.16g b.80g c.20g d.40g

61. ## chemistry

according to the data in the merck index,if 1,0g of aspirin is dissolved in 100ml of water at 37,how much aspirin will precipitate out of solution when it is cooled to 25.

62. ## Maths

please explain this mcq- According to Euclid's division of Lemma, for a and 5 if a=5q+r is unique then r = ...... is not possible. A. 0 B. 2 C. 4 D. 6

63. ## science, Health

RATE of diffusion must be expressed as number of particles moved per unit time. Write this as a word. Can you please teach me this?

64. ## Chemistry

Calculate the tota bond energy of ethanol from this info:(C_C=347,C_H=414,H_O=464,C_O=360)kJmol-1.Thanks for responding

65. ## Math

Amy, Betty and Clara went shopping together. Amy spent 20% more than Betty. Betty spent 25% more than Clara. If Amy spent \$58 more than Clara, how much did they spend altogether? (Please Show Working Clearly and try not to use Algebra)

66. ## Math

My brother gets paid £70 a week. If he owes me 1/2 of his salary . If he pays me 1/7 of what he owes me how much money will he still take home?

67. ## Chemistry

Determine the final temperature of water if 17.6 kJ of heat is added to 350 g of water initially at a temperature of 24.10 C. (specific heat of water is 4.184 Jg^-1K^-1)

5N*2m=

69. ## Trigonometry

5. If a trig equation has one answer, how many answers will it have? (Provided you do not restrict the domain?) 6. Why are the graphs of the inverse functions restricted to one period of the function? I only need to answer these two to finish my homework

70. ## math

If I work for 4/7 of a week, how many days off do I get in total over three weeks?

71. ## College

Two motorcycles of equal mass collide at a 90 intersection. If the momentum of motorcycle A is 450 kg km/h west and the momentum of motorcycle B is 725 kg km/h south, what is the magnitude of the resulting momentum of the final mass?

72. ## Physics

1.Two motorcycles of equal mass collide at a 90 degree intersection. If the momentum of motorcycle A is 450 kg km/h west and the momentum of motorcycle B is 725 kg km/h south, what is the magnitude of the resulting momentum of the final mass?

73. ## Physics

2. Two pickup trucks crash at a 90 degree intersection. If the momentum of pickup A is 4.60 x10^4 kg km/h north and the momentum of pickup B is 6.25 x 10^4 kg km/h east, what is the magnitude of the resulting momentum of the final mass?

74. ## d

I have read your article that Liane Beam Wansbrough produced, on the topic of cosmetic plastic surgery, and I am writing to express my beliefs and feelings on the topic that you have issued out. I can understand your point of view, why you chose to help

75. ## math

mark is making gift bags for his friends. there are stickers in 1/4 of the gift bags. If mark makes 12 gift bags. how many wil contain stickers? 1/4x12=3 is this correct

76. ## Chemistry

c) Now make up 500 mL of a 0.025M phosphate buffer using the 0.1M phosphate buffer. Show all your workings. The 0.1M is made of 120.1ml conjugate base and 379.9ml acid.

77. ## MATH

I NEED MATH PASS QUESTION

78. ## English

Anyone know of any short poems during the period 1910s? It can be of any subject

79. ## Maths

What is the probability of the question that you are answering To get 1Mark out of 1mark in that question.

80. ## Math

The average debt for juniors exceeds the debt for sophomores by \$ 458\$458​, and the average debt for seniors exceeds the debt for sophomores by \$1165. The combined debt for a​ sophomore, a​ junior, and a senior is \$6543. Determine the average debt

81. ## calculs

Find the point of the parabola z= x^2+y^2 which is closest to the point (3 -6 4) B_ find the centroid of the first quare the area bounded by parabola y=x^2 and the line y= x2bar Cadet ermine the centroid of the first quarter to area of the curve

82. ## English

Anyone know 1920-1939 poems? I need at least 1 to do a project

83. ## STATISTICS

Consider a t distribution with 30 degrees of freedom. Compute P(t "greater than or equal to" -1.50). Round your answer to at least three decimal places. Consider a t distribution with 6 degrees of freedom. Find the value of c such that P(-c

84. ## english

Surely no one could blame you for your careless acts you have inputted towards the younger generations. You have degraded, deluded the innocents. They have no concept that this cruel cosmetic surgery can scar their life permanently. How should i improve

85. ## Math

Find The Height Of A Tree,if The Angle Of Elevation Of Its Top Changes From 25 Dgree T0 50 Dgree As The Observer Advaces 15 Meters Towards Its Base.

86. ## math

A cargo ship can carry containers weighing up to 50,000 tonnes. If it costs £1 million to rent out the entire space on this ship, how much will it cost if I want to rent out 3/5 of the entire space? How many tonnes of space do the firm have left to sell

87. ## Math

To The Nearest Degree,find The Angle Of Elevation Of The Sun When A 9 Meters Vertical Casts A Shadow 3 Meters Long.

88. ## maths period help

find the period cos(theta/4) step plz

89. ## Chemistry

c) Now make up 500 mL of a 0.025M phosphate buffer using the 0.1M phosphate buffer. Show all your workings. The 0.1M is made of 120.1ml conjugate base and 379.9ml acid.

90. ## ss

who was the riveter 1 point)

91. ## Chemistry Titration-emergency :(

[HCl]=0.1213M Avg Amount HCl added: 14.15mL Volume of Saturated Solution of Ca(OH)2 in NaOH used: 25 mL and its concentration was 0.05349 M. 1.)Calculate the total [OH ] in the saturated solution of Ca(OH)2 in sodium hydroxide -> for this do I only find

92. ## Philosophy

1. For each of the following underlined statements identify any vagueness, semantic ambiguity or syntactic ambiguity in the statement. If the statement is vague, explain why. If the statement is ambiguous, provide at least two alternative interpretations