Questions Asked onMay 7, 2017

1. Statistics

Find the probability of getting a prime number thrice by tossing a die 10 times.

2. Chemistry

What volume of 0.200 M K2C2O4 is required to completely react with 30.0 mL of 0.100 M Fe(NO3)3? 2Fe(NO3)3 + 3K2C2O4 --> Fe2(C2O4)3 + 6KNO3

3. Trig Help Please

A smokestack is 200 ft high. A guy wire must be fastened to the stack 30.0 ft from the top. The guy wire makes an angle of 42.0° with the ground. Find the length of the guy wire.

4. trigonometry

Rewrite 4sin(x)-5cos(x) as Asin(x+phi)

5. Chem

Using this redox equation: Mn(OH)2(s) + MnO4-(aq) → MnO42-(aq) When the equation is balanced with smallest whole number coefficients, what is the coefficient for OH-(aq) and on which side is it present? ------I think its 4 and on the reactant side but i

6. Chemistry

How many grams of copper are deposited on the cathode of an electrolytic cell if an electric current of 2.00 A is passed through a solution of CuSO4 for a period of 19.0 min?

7. Chemistry

Which of the following statements is not true of nuclear fusion? A. It involves the joining of two atoms together into one new atom. B. It occurs in the sun and other stars. C. It only occurs in very large, heavy atoms. D. It releases very large amounts of

8. algebra

am I right? 1. Simplify radical expression sqrt 50 5 sqrt ^2*** 2 sqrt ^5 5 sqrt ^10 5 2. Simplify the radical expression sqrt 56x^2 28x 2x sqrt 14*** 2x sqrt 7 sqrt 14x2 3. Simplify the radical expression. sqrt 490y^5w^6 2 sqrt 135y^2 2y sqrt 135*** 27

asked by Carl Wheezer
9. finance

Find the final amount in the following retirement account, in which the rate of return on the account and the regular contribution change over time. \$470 per month invested at 5%, compounded monthly, for 7 years; then \$709 per month invested at 7%,

10. Chemistry

An unknown metal, m, forms an ionic compound with the formula, M2S3. Which formula represents the compound formed by the metal with oxygen? a) MO b) MO2 c) MO3 d) M2O3

11. Chemistry

What is the empirical formula for a compound of sodium and oxygen that contains 59% by mass? I am guessing it would be NaO because the molar mass of Na is 22.99 g/mol and 22.99 g/mol Na / 22.99 + 16 is approx 59%. Just wanted to make sure that is correct.

12. Science

Four equal point charge each of 16microcoulomb are placed on the four corners of a square of side 0.2m.calculate the force on any one of the charge

13. Chemistry

Which electron transition in a hydrogen atom will emit a photon with the longest wavelength? n = 2 to n = 1 n = 3 to n = 1 n = 1 to n = 2 n = 1 to n = 3 I would assume it would be a short electron transition since energy and wavelength are inversely

14. calculus

Consider the curve deﬁned by the equation y = 4x^3 +3x. Set up an integral that represents the length of curve from the point (0,0) to the point (4,268).

15. Chemistry

When a solution of a certain gadolinium salt is electrolyzed with a current of 1.0 A for 2.0 h, 0.025 mol of Gd metal forms. Calculate the charge on the gadolinium ion in the salt.

16. Chemistry

A 10.000 g sample of water contains 11.19% H by mass. What would by the %H in a 20.000 g sample of water? I got 22.38%, would that be correct?

17. math

My hundreds place is twice the lakh place

18. Chemistry

Calculate the mole fraction of ethanol in 95% by mass aqueous solution.Mol. mass of ethanol is 46.

Custody is defined by the Supreme Court as happening when: A. A person has been taken into "custody." B. A person has been formally arrested. C. A person has been derived of his freedom of action in any significant way. D. All of the above.

20. Trig

A conveyor is used to lift paper to a shredder. The most efficient operating angle of elevation for the conveyor is 35.2°. The paper is to be elevated 16.0 m. What length of conveyor is needed?

21. chemistry

Are these physical property's of a pure compound? What are physical properts off this list???? molar weight reactivity with halogens volatility melting and boiling points hardness, brittleness odor density air sensitivity flammability radioactivity colour

22. Chemistry

Which of the changes are chemical changes? a) Sugar crystals are ground to a fine powder. b) A candle is burned c) Two clear colorless salt solutions are mixed and a bright orange precipitate forms. d) Candle wax is melted e) A silver teapot turns black

23. calculus

If x = 18cos^3θ and y = 18sin^3θ, ﬁnd the total length of the curve swept out by the point (x,y) as θ ranges from 0 to 2π.

24. Chemistry

Given the following standard reduction potentials in acid solution write the formula of the weakest reducing agent.

25. English

What are the overall effectiveness of the speech "Pearson’s address on the inauguration of the national flag of Canada" What are his persuasive goal and what arguments he uses to achieve his purpose?

26. Chemistry

What mass of NO2 is formed by the complete reaction of 2 mol O3 with excess NO in the reaction? O3 + NO --> O2 + NO2 I know the molar mass of O3 is 48 g/mol and NO2 46 g/mol a) 23.0 g b) 46.0 g c) 92.0 g d) 96.0 g

27. Chemistry

What is the net ionic equation form the reaction between Na2S(aq) and Pb(HCO3)2(aq)? Just wanting to make sure this correct: 2Na+(aq) + S2-(aq) + Pb2+(aq) + 2HCO3-(aq) --> 2Na+(aq) + 2HCO3-(aq) + PbS(s)

28. Chemistry

Which element is oxidized and which element is reduced in this redox reaction? CO2(g) + H2(g) --> 2CO2(g) + H2O(g) Is Oxygen oxidized and hydrogen reduced?

29. Algebra

Bernie has \$16000 invested, part at 3% and the remainder at 5%. If the yearly interest on each investment is the same, how much interest does he receive each year?

30. CHECK my answers Physical science

1. which of the following should be classified as a suspension? A. soda** B. sand in water C. glass D. milk 2. Which of the following is an of example of a chemical property? A. density B. flammability C. hardness** D. melting point 3. Which state of

31. Algebra

A homeowner wants to enclose a rectangular piece of land beside a river. He must put a fence on 3 sides of the field (the river forms the fourth side). The field has length L (which runs parallel to the river) and width W. The homeowner has 200 yards of

32. algebra

A tower 25 meters tall casts a shadow 20.8 meters long. What is the distance from the top of the tower to the end of the shadow?

33. chemistry

"What mass of silicon carbide should result when 100.00g of silicon dioxide reacts with excess 100.00g of carbon?" SiO2 + 3 C = 2 CO + SiC (balanced) Direct question from homework; I was wondering if someone could explain how to find the solution with

asked by h. marie
34. Chemistry

When a radioactive isotope releases a beta particle, the atomic number of the new element is A. decreased by one. B. decreased by two. C. increased by one. D. increased by two.

35. Psychology

Miranda is a 23 year-old female who presents with symptoms of anxiety. She is dressed in baggy clothes and appears to be very thin. Miranda states that she worries a lot about her weight. Her father is obese, and she says that she does not want “to end

36. math

Joe went school supply shopping. He spent \$22.50 on notebooks and pencils. Notebooks cost \$2.00 and pencils cost \$0.50. He brought a total of notebooks and pencils. How many pencils did he buy? What i did n+p=15 0.50n+2.00p=22.50 i dont know who to do so

37. trigonometry

8sin^2(x)+6sin(x)-9=0 simplify

38. physics

the rate at which radiant energy from the sun reaches the earth's upper atmosphere is about 1.50kW/m2. the distance from the earth to the sun is 1.50*10^11m, and the radius of the sun is 6.96 * 10^8m. if the sun radiates as an ideal black body (e=1), what

39. stats

Consumer Reports rated airlines and found that 80% of the flights involved in the study arrived on time (that is within 15 minutes of scheduled arrival time). Assuming that the on-time arrival rate is representative of the entire commercial airline

40. Biology

A dichotomous key is used to ___________. ? A. identify dicots, only B. identify organisms C. gain entry to homes by burglars D. determine the meaning of life ' my best answer is B is that correct

41. Maths

Ryan's car get 35.7 miles per gallon on the highway His fuel tank holds 12.64 gallons then how far can he travel on one full tank of gas.Round to the nearest mile

42. Algebra

A+B

If an in-court identification is influenced by an out-of-court identification, it is called a(n): a. tainted identification. b.flawed identification. c.unreliable identification. d.improper identification.

44. Maths

round off 451.248 to the nearest mile

45. Calculus

Compute the absolute and relative errors in using x to approximate x. x=pi; c=3.18

46. science

Juggle and bangles are clowns.juggles stands on one end of a teeter-Ritter at rest on the ground.bangles jumps off a platform 2.5m above the ground and lands on the other end of the teeter-totter,launching juggles into the air.juggles rises to a height of

47. chemistry

When the equation: Al(s) + HSO4-(aq) + OH-(aq) → Al2O3(s) + S2-(aq) + H2O(l) is balanced with smallest whole number coefficients, the coefficient for the hydrogen sulfate ion will be ______.

asked by John Butch
48. math

graphic pairs function in the same set of axis (1 quadrant) g(x)=3/7x+6&h(x)=3/7-3

49. Chemistry

After balancing the following redox equation(using small whole-number coefficients), add the coefficients of all species in the balanced equation. Bi(OH)3 + SnO2^(2-) → Bi + SnO3^(2-) (basic solution) --- I separated the equation into two and i know the

50. Writing skills

When, for example you can't spell a word. How do you look up the correct spilling? (1) word. How (2) word, how (3) word how (4) word; how (5) word or how I pick # 2 is this right

asked by MyDogbear12 bear
51. math

The bases of a right prism are parallelograms with sides a=10 cm, b=6 cm, and altitude of the parallelogram towards side a, ha = 3 cm. Find the surface area of the parallelogram, if the height of the prism is h=12 cm.

52. Chemistry

Which response presents ions in order of increasing atomic radius? a) smallest Cl-, K+, Na+ largest b) smallest Cl-, Na+, K+ largest c) smallest K+, Na+, Cl- largest d) smallest Na+, K+, Cl- largest I would assume the answer would be D since the electrons

53. Science

In what fields would a lab technician need to separate & identify organic items? I looked it up and it said organic chemistry, forensics.. . I'm not which one because couldn't it range?

54. Social Studies Business

1. If a consumer makes monthly payments of \$250 to pay off a car loan, what type of credit is she using? A) Non-Revolving B) Revolving C) Short Term D) Unsecured 2. Caitlin wants to buy an airline ticket, but she's uncomfortable taking that much cash to

55. Chemistry

How much heat is absorbed when a 35.0 g aluminum block increases in temperature from 23°C to 33°C? Specific heat of Al: 0.900 J*g-1*°C-1 q=msΔT q=(35.0 g)(.900)(33°C - 23°C) q= 315 J? Just making sure there isn't anything that I am missing.

56. Educational thechnonolgy

Lines are used in a design to _____.Choose all that apply. A.Create movement B.lead the eye across the page C.describe the relationship between certain colors D.divide a page into sections

57. Gr 12 Data

Sarah tosses 5 coins, one after the other. a) How many different outcomes are possible? b) Draw a tree diagram to illustrate the different possibilities. c) In how many ways will the first coin turn up heads and the last coin turn up tails? d) In how many

58. Chemistry

How many grams of chromium could be deposited on a bracelet using 0.180 A of electricity for 4.65 hours

59. Writing skills

It is just as exasperating when you discover the definition of '' evocation '' is ''the act or fact of evoking'' If you rewrote sentence 4 beginning with. Nor are you. The next words should be (1). Just as exasperated (2) exasperated any lesser (3) any

60. Writing skills

When you are told time after time that there are no jobs. And it is time for some creative thinking and acting. (1) jobs, or it (2) jobs, it (3) jobs, if it I pick #3

61. Maths

When traveling b/w two towns the time taken varies inversely with the average speed when average is 42km/hour the journey takes 2hours20minute

asked by Michael purity
62. Writing skills

It is just as exasperating when you discover the definition of '' evocation '' is '' the act or fact of evoking'' If you rewrote sentence 4 beginning with. Nor are you The next words should be (1) just as exasperated (2) exasperated any lesser (3) any less

63. Writing skills

One of the approaches taken by these psychologists has been to investigate the foundation for a happy marriage. Which of the following is the best way to write the underline portion of this sentence? If you think the original is the best way, choose option

64. Math (Integrals) (Using given method)

∫sin(x)cos(x) dx Using the identity sin(2x) = 2 sin(x) cos(x)?

65. Math

Solve and graph the following inequality: -m/5+8>10

66. maths

Given an equation of circle(x-2)2+(y-3)2=25,find the equation of the image circle after a reflection about the line y=x+3

67. calculus

from a cardboard box 12 in by 8 inches are cut out so the sides can be folded up to make a box . What dimentions will yield a maximum volume? What is maximum volume? we got our V = 4x^3--40x^2+96x V'=12x^2-80x +96 then we know to use quadratic equation I

68. Trig

Is a triangle that has sides which measure 8, 15, and 17 a right triangle? Justify your answer, ie,

69. Trig

Right triangle PQR with the right angle at Q has one side measuring 46 feet and the hypotenuse measuring 54 feet. Find the other side as a radical in simplified radical form and to the nearest tenth.

70. Algebra

Right triangle ABC has the right angle at C. Angle B is 18.5° and side a is 17.9 centimeters.Find the length of the hypotenuse.

71. Math

A bag contains 10 yellow chips and 10 red chips what is the probability of that sara will pick a yellow chip keep it and then draw a red chip on her second draw

asked by Joe Furr
72. Calculus

At what point is the function y=csc(2x) continuous?

73. health, science

How can I explain Lung cancer to children? I don't know how to explain in easy words. "Lung cancer is the uncontrolled growth of abnormal cells in the tissues of the lungs. If not treated, lung cancer may spread to the surrounding tissues and other parts

74. Algebra

Simplify each polynomial. 6g + 8k - 9g + 2k

75. Interpreting literature and the arts

I remember mama Mama understands that that Jenny and Sigurd (1) are concerned about Trina's welfare (2) don't want Trina to become an old maid (3) want to feel superior to Trina (4) want Trina to be happily married (5) aren't interested in Trina's news I

76. Calculus

A rectangular page is to contain 8 square inches of print. The margins at the top and bottom of the page are to be 2 inches wide. The margins on each side are to be 1 inch wide. Find the dimensions of the page that will minimize the amount of paper used.

77. math

Marvin has a box containing apples and oranges. *There are a total of 100 apples and oranges in the box. *The number of apples in the box is 16 more than the number of oranges How many apples are in the same box? Answer: Its a system of equation so a+o=100

78. Maths

A man walks for 9km in the direction 246 degrees and then for 6km in the direction 096 degrees. Questions;1. Find his displacement from his starting point. And 2. Illustrate the information above in a diagram.

79. Chemistry

Which compound has the highest lattice energy? a) CaO b) LiF c) MgO d) NaF I am guessing B because Lithium has the lowest energy level?

80. Stat

4 different letters are dropped on the floor and then inserted into four differently addressed envelopes. Find the probability that exactly 2 letters are inserted into the proper envelope.

81. AVID (elective)

Hi! I have 2 questions. Teacher told me that I have to answer each question by an essay. But please just give me only 4 sentences if that's alright. 1. How does booker t. washington ideas in UP in slavery and avid's mission similar? 2. What are the similar

82. Physics

The spring of force constant k = 400 N/m is set up horizontally with a 0.300 kg mass attached on it resting on a frictionless table. The mass is pulled so that the spring is stretched 0.100 m from the equilibrium point, and is then released from rest.

83. physics

Suppose a tank contains 714 m3 of neon (Ne) at an absolute pressure of 1.01×10^5 Pa. The temperature is changed from 293.2 to 294.7 K. What is the increase in the internal energy of the neon?

84. calculus

Find the length of the curve deﬁned by the parametric equations x = 2/3t, y = 2ln((t/3)^2−1) from t =6 to t =7.

85. essay edit help

I looked around to see the Munchkins desperately running away, they screamed and rushed into their homes. The summer sun felt hot on my skin. “I thought you said she was dead” said a girl I’ve never seen before, “that was her sister the Wicked

asked by kpop bois
86. Reasoning

Deborah's father is twice as old she is now.if their ages add up to 45 years how old is Deborah.

87. physics

a stone is thrown vertically upward with an intial velovity of 12m/s, after some time it returns to the same position a)what is the displacement of the stone b)the highest point it reached if it took 2 seconds for the stone to reach this point c)the

88. math

my watch is twelve minutes slow .the bus for which I am waiting should have arrived at 3.49pm but it is five minutes late. What time would my watch show when the bus arrives?

89. precal vocabulary

What is the vocabulary word for the direction of a curve when points are plotted in the order of increasing values of t? What is the vocabulary word for the form of the equation of a graph using a pair of parametric equations?

Custody is defined by the Supreme Court as happening when: A person has been taken into "custody". A person has been formally arrested. A person has been deprived of his freedom of action in any significant way. All of the above.