# Questions Asked onNovember 26, 2016

1. ## Calculus

The base of a solid is the circle x2 + y2 = 9. Cross sections of the solid perpendicular to the x-axis are equilateral triangles. What is the volume, in cubic units, of the solid? 36 sqrt 3 36 18 sqrt 3 18 The answer isn't 18 sqrt 3 for sure.

2. ## math

If f is a function such that the limit as x approaches a of the quotient of the quantity f of x minus f of a and the quantity x minus a equals 7, then which of the following statements must be true?

3. ## Differential calculus

Find the most economical proportions for a covered box of fixed volume whose base is a rectangle with one side three times the other.

4. ## Math

Find the resultant in magnitude and direction of forces 10N, 20N, 30N, 40N, acting respectively in the direction 60,120,180 and 270. I tried drawing out the forces with the respective angles but the angles are more than 360.#confused

5. ## mechanical behaviour of materials

Iron carbide (Fe3C) particles are dispersed in iron. The surface energy of Fe3C is 2J/m2, the shear modulus of iron is 64GPa and the Burgers vector of iron is 0.25nm. What minimum surface energy of the obstacle is required to induce dislocations to be

6. ## pre calculus

Forces with magnitudes of 250 pounds and 130pounds act on an object at angles 45degrees and -60degrees respectively with the positive axis. Find the direction and magnitude of the resultant of these forces.

7. ## Math

Using the letters A and B, the following two-letter code words can be formed: AA, AB, BB,Ba. Using the letters A, B, and C, how many different three-letter code words can be formed? I know that the answer is 27 from the answer sheet, but how? Can you

8. ## Algebra

A private plane traveled from Seattle to a rugged​ wilderness, at an average speed of 420 mph. On the return​ trip, the average speed was 300mph. If the total traveling time was 6 ​hours, how far is Seattle from the​ wilderness?

9. ## Biology

What do plants and algal cells need to produce proteins? Where do plants and again cells get this supple from? THANKS!!!

10. ## American Government

A woman is asked to serve on a jury. Instead of hearing two sides of the case, she only hears from the prosecutors, who ask the jury to decide whether they think someone is probably guilty. The state will only arrest the person and hold a formal trial if

11. ## finance

A client in the 26 percent marginal tax bracket is comparing a municipal bond that offers a 6.4 percent yield to maturity and a similar-risk corporate bond that offers a 9.10 percent yield. Determine the equivalent taxable yield. (Round your answer to 2

12. ## math

Which of the following is the best linear approximation for f(x) = sin(x) near x = π seconds?

13. ## math

If f(−1) = −3 and f prime of x equals the quotient of 4 times x squared and the quantity x cubed plus 3 , which of the following is the best approximation for f(–1.1) using local linearization

14. ## Differential calculus

A light is placed on the ground 30 ft from a building. A man 6 ft tall walks from the light toward the building at the rate of 5 ft/sec. Find the rate at which the length of his shadow is changing when he is 15 ft from the building.

15. ## English

1. The fluorescent lamp is over the desk. 2. An ant is beneath the table. 3. The cat is under the table. 4. A book is on the table. ----------------------- Does #1 mean that the fluorescent lamp is right above the table? If the fluorescent lamp is in the

16. ## precalculus

Forces with magnitudes of 250 pounds and 130 pounds, act on an object at angles 45°and -61° respectiviley , with the positive axis. Find the direction and magnitude of the resultant of these forces.

17. ## Differential calculus

A ladder 20 ft long leans against a vertical wall, If top slides downward at the rate of 2 ft/sec, find how fast the lower end is moving when it is 16 ft from the wall.

18. ## Transcription

Her pupils were reactive to light. run-on fragment correct

19. ## Math

The Kelvin scale is an absolute temperature scale threat can be used to calculate percent change in temperatures.The formula to convert Celsius to Kelvin is K=C+ 273.15.What is the percent change if the temperature rises from 21*C to 29*C?Round to the

20. ## pre calculus

A triangular parcel of land has borders of lengths 55 meters, 85 meters, and 100 meters. Find the area of the parcel of land.

21. ## Physics

A plank 3m long and having a mass of 20kg is supported at its ends. Imagine that a person with a mass of 50 kg stands m from one end. What are the magnitudes of the force exerted by the supports?

For each of the three-digit numbers with no digits zero, the difference between the number itself and the product of its digits is calculated. The largest such difference is A. 110 B. 270 C. 902 D. 910 E. 927

23. ## stat

In an extensive study involving thousands of British children, Arden and Plomin (2006) found significantly higher variance in the intelligence scores for males than for females. Following are hypothetical data, similar to the results obtained in the study.

24. ## precalculus

Find the component form and magnitude of the vector w that has initial point(-8,-12) and terminal point (4,1)

25. ## pre calculus

Find all of the solutions of the equation x^4-625i=0 and represent the solutions graphically.

26. ## Math

As a tornado moves, its speed increases. The functions S(d) = 93logd+65 relates the speed of the wind, S, in miles per hour, near the center of a tornado to the distance that the tornado has traveled,d, in miles. a) Graph this function. b) Calculate the

27. ## Algebra

The equation h = -16t^2 + 32t + 9 gives the height of a ball, h, in feet above the ground, at t seconds after the ball is thrown upward. How many seconds after the ball is thrown will it reach its maximum height? What is its maximum height?

28. ## Differential calculus

reservoir has the shape of a right-circular cone. The altitude is 10 feet, and the radius of the base is 4 ft. Water is poured into the reservoir at a constant rate of 5 cubic feet per minute. How fast is the water level rising when the depth of the water

29. ## pre calculus

how do you use e^a+bi = e^(cos b + i sin b) to derive the equation eπi + 1 = 0

30. ## physics

A pendulum clock has a pendulum shaft made of aluminum which has a coefficient of linear expansion of 24.0*10^-6K^-1. At 22 degrees celsius the period of the swing of the pendulum is 1.00seconds. If the temperature is reduced to 5 degrees celcius, how much

31. ## physics

An airplane is flying above the Earth's surface at a height of 9.30 km. The centripetal acceleration of the plane is 18.2 m/s2. What is the angular velocity of the plane moving in uniform circular motion? Take the radius of the earth to be 6400 km.

32. ## chemistry

CH4+2O2-->CO2+2H2O If 22.75g of carbon dioxide is obtained when 9g of methane is burned in excess oxygen, what is the percent yield? Show work too please

asked by help pls
33. ## analogies

Letter is to mail as money is to (a)bank (b)savings (c)invest (d)account

34. ## American Government

The federal government sets requirements that all public schools must follow, while state governments set standards listing what students need to learn. This is an example of what constitutional system? A. dual federalism B. cooperative federalism C.

35. ## hdhs

A box open at the top has its outer dimensions 10cm,9cm & 2.5cm and its thickness 0.5mm. Find the volume of the metal

36. ## Algebra

The sum of 2 numbers is 40, the smaller no. Is 6 less than the larger no. Find the numbers w/ solutions. Thanks

37. ## precalculus

Use Demoivre's theorem to find the indicated power of the complex number. Write the result in standard form. 1.(3(cos5pi/4+i sin 5pi/4))^8 2.(3-3i)^6

38. ## Trigonometry

Write an algebraic expression for y=tan (cos^-1 x/3)for 0

39. ## finance

You note the following yield curve in The Wall Street Journal. According to the unbiased expectations theory, what is the 1-year forward rate for the period beginning one year from today, 2f1? (Round your answer to 2 decimal places.) Maturity Yield One day

40. ## Instructional Materials

exam 026039RR

41. ## Science

The radius of solid gold sphere is 0.5 cm ,if density of gold is 1.95*10qo power 8 kg/meter cube .Calculate its mass

42. ## Physics

If the angle of incidence is 30degree and refractive index is 2 find the angle of refraction.find whether the medium is denser or rarer

43. ## ENGLISH

1.what are the behavior of students towards school rules and regulation ? 2.why do the students need to follow the school rules and regulations? 3.how does it affects to the behavior of the students

44. ## English

On the hill, there is a house. When we walk down a little, there is a lake. In that case, we can say as follows. 1. The house is above the lake. 2. The house is over the lake. 3. The lake is below the house. 4. The lake is under the house. In this case, #1

45. ## Riddle

Long_short,round_square,good_broken,painted_plaine. What are they.

46. ## English

There is a crib next to the wall. There is a picture on the wall. In this case, do we use #1? In this case, #1 is not the same as #2. Is that right? #4 is not suitable, either. 1. The picture is above the crib. 2. The picture is over the crib. 3. The crib

47. ## science

What is the average speed of a race cow that travels 60 meters in 20 seconds?

48. ## Physics

A bank robber, after completing his heist, jumps into his getaway car and drives away from the scene of a crime, down a straight highway at 40 m/s. A police vehicle follows in pursuit, leaving the bank 2 minutes after the robber left. If the police travel

49. ## calculus

your friend left his home 2 hours ago and cycles due north at 30 km/h. you have been cycling due west at 20 km/h and arrives at his home now. At what time were the two of you closest to each other?

50. ## Calculus

Find the volume of the solid formed by rotating the region bounded by the graph of y equals 1 plus the square root of x, the y-axis, and the line y = 3 about the line y = 5.

51. ## 7th grade Pre- Algebra

R/5 - 6 = -1 I know the answer is 25, but can you show me the steps. Thank you.

52. ## pre calculus

Use the information to solve the triangle. If two solutions exist find both. 1.A=36°, B=98°, c=16 2.a=4, b=8, c=10 3.A=35°, b=8, c=12

53. ## Science

One ship, sailing east with a speed of 7.5 m/s, passes a certain point at 8A.Mand a second ship sailing north at the same speed, passed the same point at 9:30 A.M. At What time are they closest together and what is the distance between them then?

54. ## Math

The doubling function (y = y base0 2^(1/D)) can be used to model exponential growth when the doubling time is D. The bacterium Escherichia coli has a doubling period of 0.32 h. A culture of E. coli starts with 100 bacteria. a) Determine the equation for

55. ## Maths

A stick is 88m 42cm long. We cut it in two equal parts, what will be the length of each part?

56. ## Differential calculus

A piece of wire of length 2 m. is cut into two parts, one of which is bent into the shape of a square and the other into a shape of a circle. How should the wire be cut so that sum of the enclosed areas is minimum.

57. ## Algebra

A private plane traveled from Seattle to a rugged​ wilderness, at an average speed of 220 mph. On the return​ trip, the average speed was 264mph. If the total traveling time was 5 hours, how far is Seattle from the​ wilderness?

58. ## Calculus

Determine the relative extremum for the function , f(x,y)=((x^2)+(y^2))(e^-x)

59. ## Maths

Defg is a parallelogram find the measure of angle f

60. ## Calculus

Find dz/dy for the following : z=(e^xy)+2ycos(xy-1)

61. ## Calculus

I am working on a regression model , if my residuals don't exceed 0.6 does that mean this model is OK for my data?,

62. ## Physics

A satellite orbits the Earth in an orbits 750 km high. Find (*) the satellite's orbital speed and (**) period. (The mass and radius of the Earth are 5.98E + 24 kg and 6370000 m, respectively.)

63. ## Chemistry

What volume of 0.1244M hydrochloric acid is required to neutralize 24.81 ml of 0.1026M barium hydroxide? from the mole to mole ratio and the given information I came up with .00509 mols of HCl. would I multiply this by 0.1244 or divide by .1244. I'm not

64. ## calculus

A rocket has been launched from Russia International Terminal towards the point (√tk, 〖te〗^k, k) at a speed 2000 feet/second. What is the position of the rocket after half an hour?

65. ## science

A system contains 0.15 m3 of a gas at a pressure of 3.8 bar and 150 C. It is expanded adiabatically till the pressure falls to 1 bar. The gas is then heated at a constant pressure till its change in enthalpy is 70 kJ. Determine the total work done.

66. ## MATH HELP NEEDED

. –2v – 7 = –23 (1 point) 15******** 8 –8 –15 2. start fraction x over 3 end fraction – 10 = –12 (1 point) –6 –66 6****** 66 3. start fraction x over 5 end fraction + 6 = 10 (1 point) 44 30 20******** –20 4. 3(4 – 2x) = –2x (1

asked by Bill Cipher
67. ## MATH HELP NEEDED prt 2

–2v – 7 = –23 (1 point) 15******** 8 –8 –15 2. start fraction x over 3 end fraction – 10 = –12 (1 point) –6 –66 6****** 66 3. start fraction x over 5 end fraction + 6 = 10 (1 point) 44 30 20******** –20 4. 3(4 – 2x) = –2x (1 point)

asked by Bill Cipher
68. ## Physics

A tension spring opposes being stretched, but offers no resistance to being compressed (think of a slinky!). A tension spring, with an equilibrium length of 1.25 m, is suspended by one end from a ceiling at a height of 2.5 m above the ground; a mass of 100

69. ## pre calculus

ea + bi = ea(cos b + i sin b) This formula gives rise to the equation eπi + 1 = 0. . Show how Euler’s formula can be used to derive this equation.

70. ## Chemistry

The equilibrium constant, K, for the following reaction is 1.54×10-2 at 506 K: PCl5(g) PCl3(g) + Cl2(g) An equilibrium mixture of the three gases in a 15.7 L container at 506 K contains 0.207 M PCl5, 5.64×10-2 M PCl3 and 5.64×10-2 M Cl2. What will be

71. ## math

you want to buy three books that are on sale at 20% off. the original prices of the books are \$2.50, \$4.95, and \$6.00. How much will you save?

72. ## math

your school is putting on a prom fashion show, and you are in charge of building a platform to serve as a stage. Main stage is a rectangle and the runways is a square. the length of the main stage is three times the length of the runway and the width of

73. ## Math

If the internal diamter of a steel tube is 3cm and thickness 4mm,what is the external diamter?

74. ## AP Calculus

I am doing the 100 meter men's freestyle swimming lab (in case you know what I am referring to) and I need to fibd the lower limit analytically. I am given a table of data containing the years after 1900 and the time in second of each country , for

75. ## pre calculus

Write the complex number z=-2+2i in trigonometric form.

76. ## pre calculus

Write the complex number 100(cos240°+ i sin240°) in standard form.

77. ## Math

How many 1/3 are there in 25/5

78. ## Math

Sean walk 3/4 of a mile in 15 minutes. At that same pace, how far, in miles, can Sean walk in 1 hour and 20 minutes?

79. ## Math

1. What type of graph does not show the number of times a response was given? (1 point) box-and-whisker plot line plot stem-and-leaf plot bar graph 2. Which of the following types of information is suited for display on a scatter plot? (1 point)

80. ## chemistry

2Na+2H2O-->2NaOH+H2 what is the mass of reactant left over? pls show work too thank you

asked by help pls
81. ## pre calculus

find (a)2v+u, (b)u-3v, and (c)5u-v u=, v=

82. ## pre calculus

Find the component form and magnitude of the vector w that has initial point(-8,-12) and terminal point (4,1)

83. ## An airline requires carry-on luggage to weigh at m

An airline requires carry-on luggage to weigh at most 40 pounds. Your suitcase currently weighs 10 pounds. How many pounds p are available for you to fill your suitcase with other items?

asked by Bill Cipher
84. ## Discrete Math

I need help for this question. I need to find the number of integer solutions for x1 + x2 + x3 + 2x4 + x5 = 68 I'm not sure what to do for 2x4

85. ## Physics

(a) Would the pattern change if you were to use a shorter wavelength of light? Clearly state what change(s) would occur (if any) and briefly explain why. (b) The apparatus is surrounded by air. Would the pattern change if it were immersed in water instead?

86. ## History

How did Andrew Jackson view his relationship with the native Americans?

87. ## math

Tanisha's mother buys 38 lemons. They know it takes 8 lemons to make 80 ounces of lemonade. Does Tanisha need more lemons ?If not ,how many extra lemons does she have? If so, how many more lemons does she need ? Explain how you found your answer.

88. ## pre calculus

find (a)2v+u, (b)u-3v), and (c)5u-v u= v=

89. ## Algebra 2

Rewrite x^2+9 as a product using complex numbers and the polynomial identity below. a. (x+3)(x-3) b. (x+3i)(x-3i) c. (3x)(3i) d. (x+9i)(x-9i) I'm not sure if it's b or d, if I'm on the right path. Please help? Thanks

90. ## Math

marvin wrote the following clues to describe a multiplication sentence. the product is close in value to 10. both factors are decimal number.the product has 3 decimal places.one factor is greater than one . The other factor is less than 1. Explain how you

91. ## Algebra 2

In the equation x^2-6x+c=0, find the values of c that will give two imaginary solutions. a. c >= 5 b. c > 6 c. c < 6 d. c > 9 I figured out the equation with 6 (so I believe either b or c is the answer) being there, but is would it be > or

92. ## Physics

A diver accustomed to standard snorkel tubing of length 25 cm tries a self-made tube of length 8.6 m. During the attempt, what is the pressure difference (in kPa) between the external pressure on the diver's chest and the air pressure in the diver's lungs?

93. ## Chemistry

If there are 10 groups performing an experiment and each group needed 25.0 mL of 0.250 M NaOH, how would you prepare the NaOH solution for the whole lab using the NaOH pellets?

asked by Mason Rutledge
94. ## Physics , static fluids

hello, I hope you can help... A diver accustomed to standard snorkel tubing of length 25 cm tries a self-made tube of length 8.6 m. During the attempt, what is the pressure difference (in kPa) between the external pressure on the diver's chest and the air

95. ## Calculus

Find dz/dy for the following : xln(1-2y) = zsin((x^2)z)-3y+z

96. ## American Government

When Alabama's governor refused to end the policy of segregation in public universities, he invoked which common argument for separation of powers under federalism? A.states' rights B.checks and balances C.direct initiative D.bicameral legislation I think

97. ## Physics , static fluids

A particular object weighs 313 N in air and 264 N when immersed in alcohol of density 0.70 g/cm3. What is the volume (in L) and the density (in kg/m3) of the object? I had origionally used the 264N as the force of buoyancy and did the Fb=density*volume*g,

98. ## pre calculus

find (a)2v+u, (b)u-3v), and (c)5u-v. 1.u=i-j, v=6i+9j 2.u=2i+3j, v=-i-2j

99. ## Physics , static fluids

The density of ice is ρ(ice) = 920 kg/m3, and the average density of water is ρ(water) = 1.00 g/cm3. What fraction of the total volume of a block of ice is exposed when floating in water? what does this even mean?

100. ## الرياضيات

اثبت انlog1/32-log32 =-10

asked by سجاد جمعه
101. ## Math

I am a two digit odd number between 80 and 90 my digits have the sum of 15 what i'm I.

102. ## Calculus

I am working on a regression model , if my residuals don't exceed 0.6 does that mean this model is OK for my data?,

103. ## Math

The sum of two nos is 40, the smaller no is 6 less than the larger no, Find the nos

104. ## precalculus

Is this correct if not could you explain how to make it correct? find (a)2v+u, (b)u-3v), and (c)5u-v. u=i-j v=6i+9i a. 2v+u u=i-j, v=6i+9i =(12i+18j) + (i-j) =13i+ 17j b. u-3v (i-j)-(18i+27i) -17i - -26j c. 5u-v (5i-5j)-(30i+54j) -25i - -59j

105. ## Trigonometry

Evaluate please: a.) arcsin(sin 13pi/16) b.) arccos(cos[-pi/18]) c.) arcsin(sin pi/18 d.) arcsec(-√2) e.) arctan(-√3/3)

106. ## precalculus

Can you please check these answers. In exercises 10-13 , find (a)2v+u, (b)u-3v), and (c)5u-v. 10.u=, v= a) 2v+u =

107. ## science

An electron in the hydrogen atom makes a transition,an energy state of principal quantom numbers ni to n2 state if the photon emitted has a wavelength 434nm what is the value of ni

asked by peace bethel
108. ## math

Thr sum of three numbers is 33.The first no.is twice the third no.The second no.is one more than the first.Determine the nos.

109. ## science

Molecular reactions involved when mohr'salt is provided to find the strength, molarity of KMnO4

110. ## finance

On March 11, 20XX, the existing or current (spot) 1-, 2-, 3-, and 4-year zero coupon Treasury security rates were as follows: 1R1 = 0.40%, 1R2 = 1.00%, 1R3 = 1.40%, 1R4 = 1.55% Using the unbiased expectations theory, calculate the 1-year forward rates on

111. ## finance

NikkiG’s Corporation’s 10-year bonds are currently yielding a return of 7.00 percent. The expected inflation premium is 1.20 percent annually and the real risk-free rate is expected to be 2.40 percent annually over the next ten years. The liquidity

112. ## maths

The Ages Of Two Children Are 11 And 8 Years.In How Many Years Time Will The Product Of Their Ages Be 208

asked by Ibrahim Kabir
113. ## math

Ways by which you can dress up if you have 3 skirts 4 shirts and 3 pairs of sandals?

114. ## finance

Consider a 2.55 percent TIPS with an issue CPI reference of 187.8. At the beginning of this year, the reference CPI was 196.5 and was at 204.4 at the end of the year. What was the capital gain of the TIPS in dollars? (Do not round intermediate calculations

115. ## math

Use a table to llustratethe permutation of the following set of object A. A strawberry a chocolate and a sugar glazed donut arranged in a row B.A cup a glass and a might arranged in a row C. The five vowels of the alphabet arranged in a row D.Ways by which

116. ## finance

A 7.10 percent coupon bond with 14 years left to maturity is priced to offer a 7.8 percent yield to maturity. You believe that in one year, the yield to maturity will be 7.4 percent. What is the change in price the bond will experience in dollars? (Do not

117. ## finance

New York Times Co. (NYT) recently earned a profit of \$1.31 per share and has a P/E ratio of 19.25. The dividend has been growing at a 6.50 percent rate over the past six years. If this growth rate continues, what would be the stock price in four years if

118. ## finance

Ecolap Inc. (ECL) recently paid a \$0.42 dividend. The dividend is expected to grow at a 10.50 percent rate. The current stock price is \$47.32. What is the return shareholders are expecting? (Do not round intermediate calculations and round your final

119. ## Math

Biologists tagged 180 fish in a lake on January 1. On February​ 1, they returned and collected a random sample of 4545 ​fish, 1515 of which had been previously tagged. On the basis of this​ experiment, approximately how many fish does the lake​

120. ## Math

Suppose that Hortense and Mort can clean their entire house in 7 ​hours, while their​ toddler, Mimi, just by being​ around, can completely mess it up in only 5 hours. If Hortense and Mort clean house while Mimi is at her​ grandmother's, and then

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122. ## Math grade7

Macy's is having a special on Tuesday .you can buy each tshirt at its regular price or you can buy tshirt for \$ \$ 25 Julie bought one of each tshirt at sale price of \$ 25.00 what percentage of the original total rice did Julie save. Harry Julie's best

123. ## English

Posted by rfvv on Monday, November 21, 2016 at 4:44am. 1. Korea drew the game against Japan. 2. Korea tied the game against Japan. 3. Korea and Japan drew in the game. 4. Korea and Japan tied in the game. 5. The game between Korea and Japan ended/finished

124. ## Statistics

18 of the 50 dvrs in an inventory are known to be defective. What is the probability you randomly select an item that is not defective?

125. ## chemistry

Cu+HNO2-Cu(NO3)2+NO solved by oxidation no. Method

126. ## Math

A cooperation must appoint a president, CEO, COO,and a CFO. It must also appoint a planning committee with 3 different members. There are 15 candidates and officers can also serve on the planning committee. How many different ways can the officers be

127. ## science

Discuss scientific and technical concepts related to materials science for plastics

128. ## Maths help asap please

What is the smallest integer of c that satisfies the inequality of 3c-7 > 5c+4 Many thanks.

129. ## science

Provide an example of an application or object that is made of materials specifically engineered for that purpose.

130. ## science

Discuss how materials science has advanced to the stage where materials can be engineered to fit a specific purpose.

131. ## Mathmatics help please

a and b are two positive intergers which are greater than 5. The hcf of a and b is 5. The lcm of a and b is 75. What is a and b. Thank you.

132. ## Math

There was 2/3 of 12 slice pizza on the table.Joe are 6 slices from that. what fraction of the whole pizza was left?

133. ## science

Discuss current or future applications of nanotechnology in fields such as medicine, engineering, space exploration, fuel cell development, air and water purification, and agriculture.