# Questions Asked onOctober 30, 2011

1. ## AP Chemistry

Which of the following electron configurations correspond to an excited state? Identify the atoms and write the ground-state electron configuration where appropriate. If the configuration is a noble gas, enter the noble gas in brackets, for example [Ne]

2. ## Calculus

Find the linearization L(x) of y=e^(7x)ln(x) at a=1. L(x)=

3. ## Calculus

A searchlight rotates at a rate of 2 revolutions per minute. The beam hits a wall located 8 miles away and produces a dot of light that moves horizontally along the wall. How fast (in miles per hour) is this dot moving when the angle between the beam and

4. ## calculus

A searchlight rotates at a rate of 4 revolutions per minute.? The beam hits a wall located 13 miles away and produces a dot of light that moves horizontally along the wall. How fast (in miles per hour) is this dot moving when the angle between the beam and

5. ## Math Homework

A car dealer carries out the following calculations. What is the annual percentage rate? (Round your answer to the nearest tenth.) List price \$ 5,368.00 Options \$ 1,625.00 Destination charges \$ 200.00 Subtotal \$ 7,193.00 Tax \$ 431.58 Less trade-in \$

6. ## Chemistry

Glycine amide hydrochloride (BH+) FM 110.54, pKa 8.20 Glycine amide (B) FM 74.08 b.) How many grams of glycine amide should be added to 1g of glycine amide hydrochloride to give 100ml of solution with pH 8? I tried using the henderson-hasselbalch equation

7. ## calculus

the equation of motion is given for a particle, where s is in meters and t is in seconds. find the acceleration after 2.5 seconds.

8. ## Calculus

Use the Linear Approximation to estimate ∆f=f(3.5)−f(3) for f(x)=2/(1+x^(2))? Δf ≈ Estimate the actual change. (Use decimal notation. Give your answer to five decimal places.) Δf= Compute the error and the percentage error in the Linear

9. ## physics

A boy pushes a book by applying a force of 40N.Find the work done by the force ,if the book is displaced by 25cm along the path.

10. ## Chemistry

How many grams of glycine amide (FM 74.08) should be used with 1.0 gram of glycine amide HCl (FM 110.54, pKa=8.20) to give 100 mL at pH 8.0? The buffer equilibrium reaction is: GlycineAmideHCl GlycineAmide + H+ which has the general form: BH+ B + H+ I'm

11. ## Physics

At the beginning of a new school term, a student moves a box of books by attaching a rope to the box and pulling with a force of F = 84.4 N at an angle of 64degrees. The acceleration of gravity is 9.8 m/s/s. The box of books has a mass of 14 kg and the

12. ## Physics

A box, with a weight of mg = 25 N, is placed at the top of a ramp and released from rest. The ramp measures 4.40 meters horizontally and 3.50 meters vertically. The box accelerates down the incline, attaining a kinetic energy at the bottom of the ramp of

13. ## Calculus

Suppose that you follow the size of a population over time. When you plot the size of the population versus time on a semilog plot (i.e., the horizontal axis, representing time, is on a linear scale, whereas the vertical axis, representing the size of the

14. ## Physics

A 0.5 kg wooden block is placed on top of a 1.0 kg wooden block. The coefficient of static friction between the two blocks is 0.35. The coefficient of kinetic friction between the lower block and the level table is 0.2. What is the maximum horizontal force

15. ## Calculus

A 18 ft ladder leans against a wall. The bottom of the ladder is 4 ft from the wall at time t=0 and slides away from the wall at a rate of 3ft/sec. Find the velocity of the top of the ladder at time t=1. The velocity of ladder at time t=1 is __________

16. ## Calculus

Estimate delta f using the Linear Approximation and use a calculator to compute the error. f(x)=sqrt(3+x). a=6. delta x=0.1. delta f= With these calculations, we have determined that the square root of ___________ is approximately _______ The error in

17. ## physics

A boy pushes a book by applying a force of 40N.Find the work done by the force ,if the book is displaced by 25cm along the path.

18. ## calculus

rectangle is inscribed between the x-axis and the parabola y=16-x^2 wiht one side along the x-axis as shown below

19. ## Math

completely factor the difference of two squares x^2 - 64

20. ## Calculus

A hot air balloon rising vertically is tracked by an observer located 3 miles from the lift-off point. At a certain moment, the angle between the observer's line-of-sight and the horizontal is pi/5 , and it is changing at a rate of 0.1 rad/min. How fast is

21. ## EnglishCheck

CHECK PLEASE 1. (Points: 2) The bank will not (lend, loan) money for home repairs. b. loan Save Answer 2. (Points: 2) My allergies sometimes cause me to (loose, lose) my voice. b. lose Save Answer 3. (Points: 2) Please leave the report on the desk, and

The momentum and the kinetic energy of particle A is eight times and nine times the momentum and the kinetic energy of particle B, respectively. What is the ratio of the mass of particle A to that of particle B?

23. ## Organic chemistry - Nitration

Why does the amount of dinitration increase at high temperatures?

24. ## physics

A ball of mass 1kg is thrown upwards and reaches a maximum height of 4m.Calculate the work done by the force of gravity during vertical displacement.Take g=10m/s

25. ## physics

In the Earth–Moon system, there is a point where the gravitational forces balance. This point is known as the L1 point where the L stands for Lagrange, a famous French mathematician. Assume that the mass of the Moon is 1/81 that of the Earth. (a) At what

26. ## homework

every yellow marble is expensive.one -half the orange marbles are expensive.one -half of all expensive marbles are yellow. there are 40 yellow marbles and 25 expensive marbles that are niether yellow nor orange. how many orange marbles are there?

27. ## physics

Find the amount of work done by a labourer,who carries 'n' number of bricks of mass 'm' kg each to the roof of a house of height 'h'.

28. ## physics

A boy pushes a book by applying a force of 40N.Find the work done by the force ,if the book is displaced by 25cm along the path.

29. ## calculus

find equations of the tangent lines to the curve y=(x-48)/(x+48) that are parallel to the line y=6x+6

30. ## Chem 2

What is the molar solubility of copper(II) carbonate at 25 oC in a solution that is 0.055 M in copper(II) chloride? I have done one and I am not sure I am doing it correct. If you can show your work for myself to understand. That would be awesome. Thank

31. ## maths

write the following numbers in standard form. i.49800000 ii.0.000003

32. ## chemistry

calculate the molarity of acetic acid in a vinegar sample,knowing that 5.00ml of vinegar requires 43.50ml of 0.105 M NaOH to just reach the phenolphthalein endpoint in a titration

33. ## Physics

A piece of clay is stuck to the edge of a potter's wheel. Draw a diagram to show the path of the clay if it comes unstuck while the wheel is rotating.

34. ## cemistry

when 2.13 moles of C3H8 burn in excess oxygen, how many moles of CO2 will be formed? Assume this is a complete combustion

35. ## physics

1. the pilot of a private plane flies 20km in a direction 60 degrees north of east,then 30km straight east,then 10km straight north.how far and in what direction is the plane from the starting point. 2. two forces acts on a point object as follows 100N at

36. ## Calculus

The rate (in mg carbon/m3/h) at which photosynthesis takes place for a species of phytoplankton is modeled by the function P = 110I I2 + I + 4 where I is the light intensity (measured in thousands of foot-candles). For what light intensity is P a maximum?

37. ## Math

Write and solve a system of equations for each situation. 1.Your school sells tickets for its winter concert. Student tickets are \$5 and adult tickets are \$10. If your school sells 85 ticket and makes \$600, how many of each ticket did they sell? -Could

38. ## accounting

Classify each of the following costs incurred in manufacturing bicycles as variable (V), fi xed (F), or mixed (M) cost (using number of units produced as the activity measure). Also indicate whether the cost is direct material (DM), direct labor (DL), or

39. ## accounting

Express the following comparative income statements in common- size percents and assess whether or not this company’s situation has improved in the most recent year. 5 points) MULAN CORPORATION Comparative Income Statements For Years Ended December 31,

40. ## ****college algebra****

Let g(x) = -2x + 8 and h(x) = 3x + 4. For what value of x is composition (g o h)(x) = (h o g)(x). If no such value exists, type in DNE in the space provided.

41. ## physics

What acceleration will you give to a 24.2 kg box if you push it horizontally with a net force of 82.0 N?

42. ## Physics

In this problem, use g = 9.80 m/s2. Bizarro, located at Six Flags New England, in Agawam, MA, is the name of one of the top-rated roller coasters in the country. The first drop on the roller coaster brings you down 67 meters. There are some resistive

43. ## Physics

Before the force is applied (t < 0 on the graph), the particle moves along the X axis with velocity V1 = -7.6 m/s. Find the velocity V2 of the particle after force stops acting on it. (t > 8s)

44. ## physics

A planet with a mass of (7*10^21) kg is in a circular orbit around a star with a mass of (2*10^30) kg. The planet has an orbital radius of (3*10^10) m. (a) What is the linear orbital velocity of the planet? (b) What is the period of the planet's orbit? (c)

which statement is false about Globaliztion? Free markets are effective than government rules or national boundries are increasing in importance. I think its A, that free markets are more effective than government rules.

47. ## early childhood education

the main goal of effective health education programs for young children is to a)provide children with the knowledge necessary to eat and exercise properly b)promote critical thinking skills behaviors and attitudes c)teach children that authority figures

48. ## Algebra

Find the numbers that each letter stands for. EFGHx4=HGFE E= F= G= H=

49. ## physics

An engine pulls a train 1km over a level track.Calculate the work done by a train given that frictional resistance is 5*100000N

50. ## geography (Ms. Sue)

So, My Mom was right in telling me that I was wrong in thinking it was the International Dateline. She tried to explain it to me like you did. Thank You Ms. Sue.

51. ## ****college algebra****

Let g(x) be a rational function with a numerator of 6x2 + 12x - 48 and a denominator of 2x2 - 8. Use this information to evaluate g(8).

52. ## math

what is the discount period, bank discount, and proceeds on 25000.00 at 9% for 60 days, date of note is June 8 and date note discounted is July 10?

53. ## Chemistry

It takes 208.4 kJ of energy to remove 1 mole of electrons from 1 mole of atoms on the surface of rubidium metal. How much energy does it take to remove a single electron from an atom on the surface of solid rubidium in Joules? What is the maximum

54. ## physics

a(n) 6kg object moving with a speed of 8.3 m/s collides with a(n) 18kg object moving with a velocity of 10 m/s in a direction 23(degrees) from the initial direction of motion of the 6kg object. What is the speed of the two objects after the collision if

55. ## Enlisgh

You are an upper-level manager in a large metropolitan hotel. One of your assistant managers, Jeff Clarke, has left you a voicemail message requesting emergency leave for the upcoming holiday weekend. Here's what the message stated; I'm calling to request

56. ## physics

Newton was holding an apple of mass 120 g and thinking about the gravitational forces exerted on the apple by himself and by the Sun. Calculate the magnitude of the gravitational force acting on the apple due to Newton, the Sun, and the Earth, assuming

57. ## Physics

A person with a mass of 110 kg is standing on a scale that reads weight in newtons inside of an elevator. If the elevator accelerates upward at 3.4 m/s2 , what does the scale read?

58. ## chemistry

If you burn 0.200 g of C(graphite) in an excess of O2 to give CO2, the temperature of the calorimeter, which contains 775 g water, increases from 25.00 degrees C to 27.38 degrees C. The heat capacity of the bomb is 893 J/K. What quantity of heat is evolved

59. ## Principles of Color

How could you use color to achieve a very dramatic effect?

61. ## Chemistry

Calculate the freezing point of a solution of 3.46 g of a compound,X,in 160 g of benzene. When separate sample of X was vaporised, its density was found 3.27 g/L at 116 c and 773 torr. The freezing point of pure benzen is 5.45 c, and kf is 5 .12 c/m.

On January 18, 2007, BusinessWeek reported yeilds on Treasury bills. Bruce Martin purchased a 10000.00 13-week Treasury bill at 9881.25 (a) What was the amount of interest? (b) What was the effective rate of interest?

Immediate help needed for the following two questions: 15-12A. (Break-even point) You are a hard-working analyst in the office of financial operations for a manufacturing firm that produces a single product. You have developed the following cost structure

64. ## math

Of 30 books (15 novels, 10 history books and 5 math books), how many ways can you get a bunch of four books to give to a friend?

65. ## mathematics

1. In an examination conducted for 80 candidates, those who passed in mathematics were 17 more than those who passed science and 9 failed both subjects.14 candidates passed both subjects. I. Draw a venn diagram to illustrate this information II. How many

66. ## algebra

b) The sales representative later indicates that there are two and one quarter as many homes available with the first floor plan than the second. Write an equation that illustrates this situation. Use the same variables you used in part a. Express the

67. ## accounting

Selected year- end financial statements of Cadet Corporation follow. ( All sales were on credit; selected balance sheet amounts at December 31, 2008 (prior year – you will need this to calculate certain averages), were inventory, \$ 56,900; total assets,

68. ## chemistry

Consider the last electron in Li: Values n,l,ml,and ms of 1,1,0, +1/2 are not allowable. Why not. I do not understand this question. I am not sure what the values for the last electron would be.

69. ## Math

(-4,8);6x=7y+3 Write the equation of the line containing the given points and parallel to given line express your answer in y=mx+b form

70. ## statistics

A survey is being planned to determine the mean amount of time corporation executives watch television. A pilot survey indicated that the mean time per week is 15 hours, with a standard deviation of 3.5 hours. It is desired to estimate the mean viewing

71. ## pre algebra

Use the five steps for problem solving to answer the following question. Please show all of your work. Marissa has budgeted \$65 for her monthly cell phone expense. If her plan with her wireless provider is \$15 plus \$0.25 for each minute, how many minutes

72. ## Honors chemistry

i am doing a project for school and i was told to research the alloy of 16 carat gold. I have found all the other information that i need, but i cannot find the melting or boiling point of 16 carat gold! please help soon my project is due tomorrow.

73. ## Statistical significance test

I did a biology experiment where I need to analyze the statistical significance of betweeen a data set. My experiment consisted of measuring the effects in photosynthesis and cellular respiration by exposing solutions with leaf discs to different light

74. ## Physics

A city planner is working on the redesign of a hilly portion of a city. An important consideration is how steep the roads can be so that even low-powered cars can get up the hills without slowing down. It is given that a particular small car, with a mass

75. ## Calc

How do you take the integral of dy/(y^2 + 4)?

76. ## Statistics

During a national debate on changes to health care, a cable news service performs an opinion poll of 570 small-business owners. It shows that 72 percent of small-business owners do not approve of the changes. (a) Develop a 90 percent confidence interval

77. ## Chemistry

a. Calculate the delta H, delta G, and equilibrium constant for the reaction of methane with Cl2 to give CH3Cl and HCl. Use the following information for your calculations: Bond Dissociation Energies: CH3-H (104.8kcal/mol), Cl-Cl(59.0 kcal/mol),

78. ## English

Can you help me write an essay of 450 words on the topic " Substance Abuse in schools"

79. ## History

Do you know any issues dealing with the second amendment?

80. ## physics

A 2.6 kg block of ice at a temperature of 0.0C and an initial speed of 5.3 m/s slides across a level floor. If 3.3 × 105 J are required to melt 1.0 kg of ice, how much ice melts, assuming that the initial kinetic energy of the ice block is entirely

81. ## prob and stat

Ramon has applied to both Princeton and Stanford. He thinks the probability that Princeton will admit him is 0.4, the probability that Stanford will admit him is 0.5, and the probability that both will admit him is 0.2.

82. ## calculus

A searchlight rotates at a rate of 4 revolutions per minute.? The beam hits a wall located 13 miles away and produces a dot of light that moves horizontally along the wall. How fast (in miles per hour) is this dot moving when the angle between the beam and

83. ## MATH

Thanks for the help with the sqrt problems.

84. ## Physics

Jean dangles her watch from a thin piece of string while the jetliner she is in takes off. She notices that the string makes an angle of 22° with respect to the vertical while the aircraft accelerates for takeoff, which takes about 18 seconds. Estimate

85. ## chemistry

calcium oxide reacts with water and with nitric acid. State the formula of the calcium compund when: (i) calcium oxide reacts with water (ii) calcium oxide reacts with nitric acid

86. ## Algebraic expressian

Neil spent 25 minutes on his math and some more time on his history homework

87. ## chemistry

According to the following reaction, how many moles of oxygen gas are necessary to form 0.543 moles water? hydrogen sulfide (g) + oxygen (g) water (l) + sulfur dioxide (g)

88. ## Phi103

Consider an argument you have recently had with a friend, family member,mangager,co-worker,or someone else. Identify the topic of the argument and present that argument in premise-conclusion form, Identifying both the premise and conclusion.

89. ## Climate Change

I missed the movie "An Inconvenient Truth", and now I have to answer questions about it. Does anyone know what is said about the Kyoto Protocol in that movie? Thank y'all very much.

90. ## Statistical significance (Chi squared)Please check

I did a biology experiment where I need to analyze the statistical significance of betweeen a data set. My experiment consisted of measuring the effects in photosynthesis and cellular respiration by exposing solutions with leaf discs to different light

91. ## chemistry

write the balanced formula equation and the net ionic equation for the reaction of sodium hydroxide with hydrochloric acid. Formula equation.............. net equation.............

92. ## pre-calc

"An open gift box is to be made from a square piece of material by cutting 2 centimeter squares from each corner and turning up the sides. The volume of the finished gift box is to be 200 cubic centimeters. Find the size of the original piece of material."

93. ## chem

Metabolism of one mole of glucose, C6H12O6, releases 670 kcal. How much heat is released by the combustion of 0.300 moles of glucose?

94. ## PHYSICS

1. The problem statement, all variables and given/known data A ride in an amusement park consists of a cylindrical chamber that rotates around a vertical axis as shown in the diagram below. When the angular velocity is sufficiently high, a person leaning

95. ## math

a man buys an item from delhi 10% cheaper than that at merath, incurs loss of rs. 160, but on selling the item profits rs.240. calculate the profit percentage.

96. ## Physics

A rectangularplate is rotating with a constant angular speed about an axis that passes perpendicularly through one corner, as the drawing shows.The centripetal acceleration measured atcorner A is n times as greatas that measured at corner B. What is

97. ## in-text citations

If I have an internet article, how would I do an MLA in-text citation of the article. There's no page number. Would I just put the author's last name only in parentheses? I've googled it, but I couldn't find anything,

98. ## Chemistry

Electron Configuration: What numerical values of l are possible for n=4. 1,3,5,7 what ae their corresponding letters. s,p,d,f Are these correct?

99. ## calculus

the limit represents the derivative of some function f at some number a. state f and a. lim (sin(pai/2 + t)-1)/t t->0

100. ## AP calc

A gas barrel has the shape of a right cylinder with the radius of 5 ft. and the height of 15 ft. If gas is being pumped into the barrel at the rate of 3 ft.3/min, find the rate at which the gas is rising when the gas is 8 ft. deep. any help would be

101. ## calculus

find y' by implicit differentiation: 5cos(x)*sin(y)=13

Assume that federal health investigators are pursuing a report that one of your manufacturing plants has a higher-than-average incidence of cancer among its employees, strecthing back for the files. But if the company turns them over, it might be accused

103. ## calculus

the curve with equation 2(x^2+y^2)^2=9(x^2-y^2) is called a lemniscate. find the points on the lemniscate where the tangent is horizontal.

104. ## MATH

The price of an item in a store is reduced by 50%. Then the price is reduced by another 50%. what is the total percent change as a result of the two discounts?

106. ## Africa

what is a key technological that began around 500 bce?in the sub saharan africa? a.yam civilization b.iron smelting c.writing d.monumental archetecture please help- playing a world game with my sis!

107. ## physics

A 5.0 kg block with a speed of 2.8 m/s collides with a 10 kg block that has a speed of 2.0 m/s in the same direction. After the collision, the 10 kg block is observed to be traveling in the original direction with a speed of 2.5 m/s. What is the velocity

108. ## finance

IBM issued \$1,000 30 year bonds. The bonds sold for \$936 and pay interest semi-annually. The required rate of return is 7%. wha tis the semiannual interest payment on the bonds?

109. ## CRIMINAL JUSTICE

If a person that was standing at a bus stop was arrested for failure to provide identification in the state of virginia and after arrrest found that person is an illegal alien, is this a felony or misdeameanor? and what the bond amount or fine be?

110. ## french

How do I say I am ok with Wednesday 9th November in French?

111. ## physics

An asteroid is discovered to have a tiny moon that orbits it in a circular path at a distance of 122 km and with a period of 43 h. The asteroid is roughly spherical (unusual for such a small body) with a radius of 19 km. (a) Find the acceleration of

112. ## french

How do I say I am ok with Wednesday 9th November in French?

113. ## math

give the answer to two decimal places: 89 / 43 =

114. ## Calculating Chi Squared

did a biology experiment where I need to analyze the statistical significance of betweeen a data set. My experiment consisted of measuring the effects in photosynthesis and cellular respiration by exposing solutions with leaf discs to different light

115. ## english

how can i revise this or what should i look for to revise this: To begin with, I know that the designer for this freelance job would need to consider a dimensional look. As I have a Web design and interactive media associate degree, I do have experience in

116. ## MATH

A set of 50 data values has a mean of 18 and a variance of 4. I. Find the standard score (z) for a data value = 20. II. Find the probability of a data value < 20.

117. ## Sociology

Change in any social institution requires change in the institution of family. a.True b.False I think its true...

118. ## Physic

A 23.0 kg block is sitting on the ground. Two ropes are attached to the top of the block. Rope A is pulled upward with a force of 20.0 N and rope B is pulled upwards with a force of 5.0 N. What is the normal force on the block?

119. ## physics

In the figure below, m1 = 9.5 kg and m2 = 4.0 kg. The coefficient of static friction between m1 and the horizontal surface is 0.60 while the coefficient of kinetic friction is 0.30.

120. ## chemistry

What is the pH of the solution created by combining 11.40 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)? Complete the table below: Note: Make simplifying assumptions, do not use the quadratic formula.

121. ## Calculus

The rate (in mg carbon/m3/h) at which photosynthesis takes place for a species of phytoplankton is modeled by the function P = 110I I2 + I + 4 where I is the light intensity (measured in thousands of foot-candles). For what light intensity is P a maximum?

122. ## Mathematics (Probability, Statistics, etc.)

I have a Statistics project due tomorrow on Combinatorics. Admittedly, while my math skills aren't too bad (I get 99th percentile on standardized tests and such), it has been a while since I last took a math class after a 2-year lapse in education, so my

123. ## physics

A carefully designed experiment can measure the gravitational force between masses of 9 kg. Given that the density of iron is 7860 kg/m3, what is the gravitational force between two 9.00-kg iron spheres that are touching? I can determine the correct answer

124. ## Math

Using the ordinary alphabet and allowing repeated letters, find the number of words of length 8 that begin and end with T.

125. ## physics

Eris, the largest dwarf planet known in the Solar System, has a radius R = 1200 km and an acceleration due to gravity on its surface of magnitude g = 0.77 m/s2. (a) Use these numbers to calculate the escape speed from the surface of Eris. 1360 m/s correct

write the following number as a percent. 1/200

127. ## physics

a laser beam with wavelength 632.8nm is incident normal to the plane of a diffraction grating with a slit separation d=2000nm. if the diffraction pattern is viewed on a screen 1m from the grating, find the distance separating the first, second, and third

128. ## math

between 1998 and 2004, the number of college freshman who planned to get a professional degree computer science can be reasonably modeled by f(x)=-348.2x^2+1402x+13,679 where x=0 represenjts 1998. based on this model, in what year did the percent of

129. ## math

Meg's pension plan is an annuity with a guaranteed return of 6% per year (compounded quarterly). She would like to retire with a pension of \$50,000 per quarter for 15 years. If she works 31 years before retiring, how much money must she and her employer

130. ## Probability

Reformatted so that it's easier to read. I have a Statistics project due tomorrow on Combinatorics. Admittedly, while my math skills aren't too bad (I get 99th percentile on standardized tests and such), it has been a while since I last took a math class

131. ## calculus

Find the coordinates of all points on the graph of y=23−x2 at which the tangent line passes through the point (10,26).please show the work i greatly appreciate it :)

132. ## macroeconomics

Which of these would NOT constitute investment: a. someone buys 100 shares of Exxon-Mobil b. Exxon-Mobile purchases 20 new oil rigs c. General Motors builds a new assembly plant d. Macy's remodels its stores My answer was going to be d but my textbook

133. ## stats

Suppose we have a population of scores with a mean (μ) of 200 and a standard deviation (σ) of 10. Assume that the distribution is normal. Provide answers to the following questions: What score would cut off the top 5 percent of scores? What score would

134. ## Math

Use the definition of logarithm to simplify each expression. log6b(6b) log8b((8b)^6) log12b((12b)^-11)

135. ## Calculator Help

1. The csc^-1(1.23) I got 1.061 in radian mode 2. Cot^-1(-2.26) I got 0.8240 in radians 3. Cos^-1(-0.84) I got 2.568 Are these correct?

136. ## modeling

A squadron of 16 bombers needs to penetrate air defenses to reach its target. They can either ﬂy low and expose themselves to the air defense guns, or ﬂy high and expose themselves to surface-to-air missiles. In either case, the air defense ﬁring

137. ## geography

Can you please suggest a site where I can go to help me answer this question? My book is not helping! What imaginary lines divide the Earth into the Eastern and Western Hemispheres?

138. ## Calculus optimization problem

A rectangular dog run is to contain 864 ft ^2. a. If the dog's owner must pay for fencing, what should be the dimensions of the run to minimize cost? b. Suppose a neighbor has agreed to let the owner use an already constructed fence for one side of the

139. ## modeling

A squadron of 16 bombers needs to penetrate air defenses to reach its target. They can either ﬂy low and expose themselves to the air defense guns, or ﬂy high and expose themselves to surface-to-air missiles. In either case, the air defense ﬁring

140. ## Chemistry

What are the n,l,ml,and ms values for the last electron in Be?

141. ## deserts

How are arches and deflation holows formed?

142. ## physics

A dynamics cart carrying a black 10.0 cm strip accelerates uniformly and passes through two photogates. The time for the strip through the first photogate, time in Gate1, is 0.250 s and through the second photogate, time in Gate2, is 0.180 s. (1) Determine

143. ## College

borrowed \$42,400 for 5 years interest rate 2.5%

144. ## English

Does this sentence use "Reverberate" correctly?: The sound of thunder kept reverberated in his head.

145. ## geography

Okay, I have my Mom looking at this with me. From the information on the map it seems the answer is the Prime Meridian at 0 degrees longitude and its twin line of longitude opposite to the Prime Meridian at 80 degrees longitude. However, I told my Mom it

146. ## Psychology

I need to design an experiment with an independent variable and 2 levels. I would like to experiment with whether people say something when someone removes an object from a bag. So far I have Independent Variable -Removal of Object from bag 1st

147. ## law

I have a midterm for criminal justice class to do and the istructor she said as soon as we log in to the system we would have 2 hours 15 mins to complete it

148. ## Math: Algebra 2 Linear Programming

An airline will provide accommodations for a minimum of 2000 first class, 1500 business, and 2400 economy class passengers. Airplane 1 costs \$12,000 per mile to operate and can accommodate 40 first class, 40 business, and 120 economy passengers. Airplane 2

149. ## Math (logic and problem solving)

a rubber ball is dropped froma building that is 16 meters high. Each time the ball bounces, it bounces up half as high as the previous bounce. It is caught by Romer, the wonder dog, when it bounces 1 meter high. How many meters did the ball travel before

150. ## Math Logic

If there are as many rational numbers as there are irrational numbers then the set of all irrational numbers is infinite

151. ## english

what do you call a story about real things or real people?

152. ## college algebra

Let g(x) be a rational function with a numerator of 6x2 + 12x - 48 and a denominator of 2x2 - 8. Use this information to evaluate g(8).

153. ## physics

A man of mass 70kg carries a mass of 10kg to the top of a building 100m high.Calculate work done by the man.Take g=10m/s

154. ## Logic

Gene will teach 7th grade of Gene will teach 8th grade. If Gene teaches 7th grade, he will be assigned to the Sunset Road School. Gene will carpool with Chris if he is assigned to the Sunset Road School. If Gene teaches *th grade he will have his daughter

The Treasury Department auctioned \$21 billion in three-month bills in denominations of ten thousand dollars at a discount rate of 4.965%. what would be the effective rate in interest?

156. ## Engineering

-From the following two linear homogeneous algebraic equations:(sqr= square root) (1) B*sin(kl/sqr2) = D*sin(kl) (2) (k/sqr2)*B*cos(kl/sqr2) = (k)*D*cos(kl) -Form matrix of these 2 equations and solving the determinant=0 will lead to:

157. ## General Chem lab

Hi, how do I calculate how many grams of unknown diprotic acid are needed to make 150mL of 0.750N (normal) solution? and to make 125mL of 0.500M (molar) solution? we have 0.5000M of NaOH.. Please help me...

On May 12, Scott Rinse accepted an 8000.00, 12%, 90-day note for a time extension of a bill for goods bought by Ron Prentice. On June 12, Scott discounted the note at Able Bank at 10% What proceeds does Scott receive?

159. ## Math

the banks contains quarters , dime and nickels. The number of dimes is 1 less than the number of nickels. The number of nickels is 2 more than twice the number of quarters. The coins are worth \$5.70. How many nickels are there?

160. ## math

Megan took out a loan for 1500.00. The bank is going to charge her a fee of2% of her loan amount as well as take out the interest upfront. The bank is offering her 15% APR for six months. Calculate the effective interest rate.

161. ## Chemistry

I am 100 mL of a 0.5 M HCl solution,and i want to dilute it to exactly 0.1 M. How much water should i add?

162. ## math

what is the bank discount and proceeds on 14000.00 amount due at maturity, Discount rate 3.75% and time of 280 days?

163. ## math

what is the bank discount and proceeds on 20000.00 amount due at maturity, Discount rate 6.25% and time of 180 days?

164. ## Discrete Math

What is the probability that a fair coin lands Heads 4 times out of 5 flips? Out of bit strings of length ten, what is the probability that the bit string begins and ends with 0? What if the bit string has more 0s than 1s? and, what if the bit string has

165. ## Chemistry

Why are acid added to the water not the water to the acid?

166. ## algebra

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.2 102 µm. Find this earthquake's magnitude on the Richter scale.

167. ## algebra

An artifact was found and tested for its carbon-14 content. If 84% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon-14 has a half-life of 5,730 years.

168. ## Physics

You throw a ball with a speed of 30 m/s at an angle of 40.0° above the horizontal directly toward a wall. The wall is 22.0 m from the release point of the ball. (a) How long does the ball take to reach the wall? (b) How far above the release point does

169. ## algebra

Find the number of decibels for the power of the sound. Round to the nearest decibel. A rock concert, 5.4 10-6 watts/cm2

170. ## English

Is "impinge" used correctly in this sentence: Studying Latin every day impinged her grades in both Latin and English.

171. ## Chemistry

1. What does 'the time taken to reach completion decreases if 20cm^3 of hcl containing 4mol/dm^3' means? How to work out to find the concentration? 2(a)What does concentrated hcl means? (b)What does dilute hcl means? Which will react faster or slower / a

172. ## Econmics

hi, In fact am new to this subject and i would like a have a help for my homeworks. i have got a question which is, National income figures are used to measure the standard of living in a country. What are the limitations of using national income figures

173. ## physics

The only force acting on a 4.0 kg canister that is moving in an xy plane has a magnitude of 4.4 N. The canister initially has a velocity of 4.4 m/s in the positive x direction, and some time later has a velocity of 5.8 m/s in the positive y direction. How

174. ## South America

what is the region of french guiana

175. ## geometry

Calculate angle s 2,7cm and angle p 5,4cm

176. ## physical

A man swings his child in a circle of radius 0.75 m .If the mass of child is 25 kg and the child makes one revolution in 1.5 s,what are the magnitude and direction of the force that must be exerted by the man on the child?*assume that the child to be a

177. ## physics

A man swings his child in a circle of radius 0.75 m .If the mass of child is 25 kg and the child makes one revolution in 1.5 s,what are the magnitude and direction of the force that must be exerted by the man on the child?*assume that the child to be a

178. ## English

Is "sinecure" used correctly in this sentence: He studied hard throughout college to get a sinecure job.

179. ## Math

Find the general solution of the equations csc^2 θ =4/3.

180. ## pre-algebra

Marissa has budgeted \$65 for her monthly cell phone expense. If her plan with her wireless provider is \$15 plus \$0.25 for each minute, how many minutes can she talk on her cell phone in a month and not exceed her budget?

181. ## Calculus

What is the limit as t→∞ of L(t)? L(t) = 34 - 32e^(-0.0719t) Thank you so much!

182. ## General Chemistry

c3h8+5o2 3co2+4h2o How many kg of propane only is in a 20lb tank?

183. ## ****college algebra****

Let h(x) = 3x + 4. For what value of x is (h o h)(x) = h(x). If no such value exists, type DNE in the space provided.

184. ## External diploma program

Im looking for 2 formally organized groups they each have to have a affect on one another cooperatively

185. ## Finance

Meg's pension plan is an annuity with a guaranteed return of 7% interest per year (compounded monthly). She would like to retire with a pension of \$90000 per month for 25 years. If she works 33 years before retiring, how much money must she and her

186. ## Math

Show whole number solution from 0 to 8 for inequality x - 5 > 1

187. ## Excel VBA

Am confused for this class am taking we had to design serval procedures that do different things: 6 procedures were sine, cosine, cube, square, common log, and natural log. In order to get this values we had to design loops. I have done that but, our

188. ## math

wich number is bigger 1.0 or 0.95 in decimals

189. ## physics

Find the minimum diameter of a 51.5-m-long nylon string that will stretch no more than 1.01 cm when a load of 68.9 kg is suspended from its lower end. Assume that Ynylon = 3.51·10^8 N/m2 physics - bobpursley, Saturday, October 29, 2011 at 10:32am Hookes

190. ## physics

Batman is standing on top of a 201 m tall building. He kicks off the building with a horizontal velocity of 10 m/s. Joker is driving a car towards the building at 40 m/s. What is batman's velocity at the point of impact (with respect to the ground)? How

191. ## Physics

How long does it take a plane, traveling at a speed of 170 m/s, to fly once around a circle whose radius is 3500 m?

192. ## math..

3x^3+4x^2-2x-4=0

193. ## English

Could you please check the following verbs concerning the movements or the sounds made by certain animals? 1) A pig grunts/snorts and squeals. 2) A mouse squeaks. 3) The eagle swooped down on its pray. 4) A mouse scurries. 5) I'm able to walk, trot and

194. ## calculus

3x^3+4x^2-2x-4=0

195. ## physics

Find the minimum diameter of a 51.5-m-long nylon string that will stretch no more than 1.01 cm when a load of 68.9 kg is suspended from its lower end. Assume that Ynylon = 3.51·10^8 N/m2 physics - bobpursley, Saturday, October 29, 2011 at 10:32am Hookes

196. ## english

how to write these questions into indirect questions? please 1-What other changes have there been in the last 100 years? 2-Do you think the quality of life in general is better now than it used to be?

197. ## Chemistry

The vapour pressure of pure water at 110 c is 1070 torr.A soln of ethyleneglycol in water has vapour pressure of 1 atm. Assuming that raoult's law is obeyed, what is the mole fraction of ethylene glycol in water?

198. ## history

3) The evolution of the socio-political milieu , including Protestant Christianity’s impact on colonial social life.

199. ## Math

After 3 years investment of 1200 compounded annually and an interest rate R will yield an amount of 1200 (1+R)Q write this polynomial in standard form

200. ## CRT/205

Categorizing Fallacies

201. ## math

i am a number between 20 and 30. when u divide me into 6 equal groups, there is an even number in each group and 2 are left over. what number and I

202. ## Math, trigonometry

how to evaluate sin (40)[1+sin(10)]

203. ## Cultural Diversity

An Asian parent may not emulate the early childhood teacher's practice of praising her son for his accomplishments because a. praising the child might bring him bad-luck. b.The parent believes that absence of criticism is itself an appropriate form of

204. ## early childhood education

a main source of fat and saturated fatty acids in children,s diets is a)meat b)candy c)whole milk d)french fries

205. ## english

what's the difference between a major character and a minor? Is a minor like every other character besides the major characters?

206. ## statistics

A sample mean with a z-score value between -1.00 and +1.00 would be considered a fairly typical representative sample. True or False

207. ## French

I don't get this fill in the blanks in french. Nancy _______ au centre commercial avec ses amis. (aller)

208. ## Precalculus

Complete the following identity secx-1/secx=? I have four multiple choice options and can't seem to work my way to either one. A) secx cscx B)1+cotx C)sinx tanx D)-2tan^2x

210. ## calculus

f(x) = 8 x - 2 x^2 text( at ) \(-3,-42\)

211. ## geography

Can you check these for me? 1. What is the name of the country completely surrounded by South Africa? My answer is Lesotho. 2. Which state capital is farther north, Utah's or Illinois? How do you know? My answer is Illinois's, because it is above the 40

212. ## Physics

How much force is required to accelerate 7.0 g object at 11000 "g's" in a centrifuge?

213. ## English227

You are an upper-level manager in a large metropolitan hotel. One of your assistant managers, Jeff Clarke, has left you a voicemail message requesting emergency leave for the upcoming holiday weekend. Here's what the message stated; I'm calling to request

214. ## geometry

Looking at formulas, which 2 shapes describe this relationship: the area of the 2 dimensional shape is one-fourth the surface area of the 3-demensional figure? Looking at formulas, which two figures describes this relationship: the volume of the first

215. ## geometry

a large square has sides of 24 units, midpoints of its sides are connected to create a smaller square. what is the area of the smaller square

216. ## Microbiology

I need help writing an outline for what I have written here. I would like to do my assignment of Microbes, more to the point on how microbes help us. When most people think of microbes they think for bad bacteria or the ugly side of what microbes does. I

217. ## outline writing

I need help writing an outline for what I have written here. I would like to do my assignment of Microbes, more to the point on how microbes help us. When most people think of microbes they think for bad bacteria or the ugly side of what microbes does. I

218. ## History

What about problems in the past dealing with the second amendment?

219. ## Algebraic expression

Pedro swam some laps in the pool and than swam 2 more

220. ## geometry

A fkagpole 24 feet high is 10 feet away from the base of its anchor cable, how long is the anchor cable?

221. ## Ap Chemistry

I'm doing the calculations on the lab "Oxidizing Power of Laundry Bleach," and I'm stuck on one part. This is what I have so far: My average volume of sodium thiosulfate is 6.94 ML. I then converted that into moles and got 6.94X10^-4 moles. That means that

222. ## Math

What is 100% of 86.5? Can someone explain how to find the answer.

Write the n, l, ml, and ms values for the first two elements, H and He. H: n=1 l=0 ml=0 ms=+1/2 He: n=1 l=0 ml=0 ms=+1/2 for the first electron for the second: n=1 l=0 ml=0 ms=-1/2 Are these correct?

224. ## math

A vendor at a concert sells new and used CDs. The new CDs cost 2.5 times as much as the old CDs. If 4 used CDs and 9 new CDs cost \$159, what is the price of each item?

225. ## physics science

if you wish to warm 95 kg of water by 20.0c for your bath how much heat is required

I have presentation on Purchasing candels and i want to make sure what am presenting is right. Please tell me what i have is right or wrong. Thanks! 1) Identify 3 main tasks/responsibilities of purchasing: Personnel and comparing assistance nedded. 1) Get

227. ## P.E

i need names of famous females who have a careers in sport and their: age, where they live, how many brothers and sisters they have, profession and what they do in their free time.

228. ## Math

There are 80 students 35 of them are boys about what percent are boys

229. ## Math - 5th grade

I have to find the function rule y = ? for the following table. x y -5 15 3 7 6 4 -2 12

230. ## Math

An airline has a plan in which a spouse can travel for 75% of the base cost of a ticket, and a child under 12 can travel for 50% of the base cost. a. Using the plan, what will it cost a married couple with three children under 12 to fly if the base cost is

231. ## Homework Notebook

Is there any sites or info. about making your own homework notebook. I don't like the school's so Im making my own, I have a marble notebook. - Any Ideas on like to make it organzing - Decoriting ideas - Any tools Please :) Thank You

232. ## chemistry

what is the molarity of a solution prepared by dissolving 2.24 grams of NaOH in enough deionized water to obtain 500.0ml of solution?The molar mass of NaOH is 40.0g

233. ## probability

A jar is filled with nickels and pennies. The value of the nickels is \$S and the value of the pennies is \$r. If you picked a hundred coins, what is your expected outcome?

234. ## Statistics

Suppose that a sample of 50 scores has a mean of Y=90 and the standard deviation is 15. Between what two values of Y will at least 90% of the scores fall? What is the maximun number of scores that can lie out of the interval?

235. ## geography

Thank YOU FOR THE MAP SIGHT. I see how my answer was totally wrong. That's what I get for taking the easy way out. What continents does the Arctic Circle pass through? My answer is North America, Europe, and Asia. Is that correct?

236. ## Art

I need a website where I can covert photos into line drawings for my project. Thank you for helping me! :-D

237. ## MATH

The chess club had 14 members at the beginning of the year and the membership increased by 50% by the end of the year? a: how many members were there at the end of the year? b: By the end of the next year there were only 14 members. What percent decrease

238. ## Math

A share of stock worth 100 dollars loses 90% of its value. Then, over the next year, the value of the stock increases by 90%. What is the new value of the stock?

239. ## Math

A cafe holds 300 coffee mugs. 175 of those coffee mugs do not have handles. Estimate the percent of mugs that have handles.

240. ## algebra

i need help with my math for college, im currently a little behind, ive had 2 tutors but the tutors that ive had don't really know what there doing, this is stressful and im hopig someone who knows what there doing can help me

241. ## math

Carlos had a 10% off coupon and spent it on a computer game that was marked down 30%. What was the total discount?

242. ## math

After a discount of 20%, the dress Sharon wanted was \$85. What was the original price of the dress?

243. ## PSYCHOLOGY

He is never going to change. He is set in his ways," the cliet complained. "Let's think about it. Does this hurt you or him?" the therapist is applying: I put the answer as (a) a cognitive treatment approach. Is this correct?

244. ## logic

One way to disconfirm the scientific hypothesis that chickens cannot fly would be to?

245. ## algebra

30/x+20/x-20=1

246. ## MATH

a collectible comic book worth \$40 two years ago gained 15% in value the next year, but then lost 15% in value this year what is it worth now?

247. ## Science

Hi, I need to know how to find th number of autosomes from the haploid or diploid number. Thanks

248. ## Psychology

hows does sociology relate to a man helping his handicapped wife on a daily basis?

249. ## CHEMISTRY!! NEED IMMEDIATE HELP PLEASE!!!

a. Calculate the delta H, delta G, and equilibrium constant for the reaction of methane with Cl2 to give CH3Cl and HCl. Use the following information for your calculations: Bond Dissociation Energies: CH3-H (104.8kcal/mol), Cl-Cl(59.0 kcal/mol),

250. ## physics

A car starts from rest and travels for 7.8 s with a uniform acceleration of 3.2 m/s2. The driver then applies the brakes, causing a uniform acceleration of −1.1 m/s2. If the brakes are applied for 2.8 s, how fast is the car going at the end of the

251. ## math

A share of stock worth 100 dollars loses 90% of its value. Then, over the next year, the value of the stock increases by 90%. What is the new value of the stock?

252. ## MATH

A piece of property increased in value by 14% in one year and by 10% in the next year. What was the percent of increase over two years?

253. ## geometry

a perimeter of 15 cm two or more equal sides and each side a whole number of centimeters. Prove that there are only four of these triangles. You do no need to construct the triangles.

254. ## MATH

the price f an item in a store is reduced by 50%. what is the total percent change as a result of the 2 discounts

255. ## microeconomics

You are given the following information about the costs of a perfectly competitive firm. QuantityTFC TVC 0 45 0 1 45 20 2 45 35 3 45 45 4 45 75 5 45 120 6 45 180 You are hired to determine the profit-maximizing quantity of the firm for different market

256. ## Algebra

You plan to put a fence around a rectangular lot. The length of the lot must be at least 60 feet. The cost of the fence along the length of the lot is \$1.50 per foot, and the cost of the fence along the width is \$2 per foot. The total cost cannot exceed

257. ## physics

1. the pilot of a private plane flies 20km in a direction 60 degrees north of east,then 30km straight east,then 10km straight north.how far and in what direction is the plane from the starting point. 2. two forces acts on a point object as follows 100N at

258. ## MATH

i am in 4th grade doing my sisters homework don't ask why but i need help on this question. -- Explain why the cost of an item discounted 20% can be calculated by multiplying the original price by 0.8

259. ## Chemistry

Write the n, l, ml, and ms values for the first two elements, H and He. H: n=1 l=0 ml=0 ms=+1/2 He: n=1 l=0 ml=0 ms=+1/2 for the first electron for the second: n=1 l=0 ml=0 ms=-1/2 Are these correct?

260. ## calculus

Estimate 1/(sqrt(82)) using linear approximation and the exact value for 1/(sqrt(81)) Your estimate:

261. ## physics

1. the pilot of a private plane flies 20km in a direction 60 degrees north of east,then 30km straight east,then 10km straight north.how far and in what direction is the plane from the starting point. 2. two forces acts on a point object as follows 100N at

write the following number as a percent. 6 1/2

263. ## math

Explain why the cost of an item discounted 20% and then taxed 8% can be calculated by multiplying the original price by 0.864

264. ## calculus

find equations of the tangent lines to the curve y=x/(x+5) that pass through the point (2,7).

265. ## Math

Given a standard normal distribution, determine the following. Show Table Values used in each part. a) P(Z1.32) c) P(Z< -1.32) d) P(-0.30

266. ## chemistry

A syringe containing 1.50 mL of oxygen gas is cooled from 92.3°C to 0.0°C. What is the final volume of oxygen gas?

267. ## History

What is a good analysis of the second amendment? What are some good examples? (anything other than sites)

268. ## calculus

The position function of a particle is given by s=t^3-3t^2-6t, t > =0. when does the particle reach a velocity of 66 m/s?

269. ## Math

A company is considering offering child care for their employees. They wish to estimate the mean weekly child-care cost of their employees. A sample of 10 employees reveals the following amounts spent last week in dollars. 107 92 97 95 105 101 91 99 95 104

270. ## math

24 base five time 13 base five

271. ## calculus

find d/dx (sin^(21)x *cos21x)