1. calculus

If f is the focal length of a convex lens and an object is placed at a distance p from the lens, then its image will be at a distance q from the lens, where f, p, and q are related by the lens equation 1/f = 1/p + 1/q What is the rate of change of p with

2. science

calculate the density of a solid which weighs 15N in air and 12N in water

3. Chemistry

which process occurs in a controlled fusion reaction? 1 light nuclei collide to produce heavier nuclei. 2 heavy nuclei collide to produce lighter nuclei. 3 neutron bombardment splits light nuclei 4 neutron bombardment splits heavy nuclei. is it 1 ?

4. Chemistry

You have 3.00 L of a 2.37 M solution of NaCl(aq) called solution A. You also have 2.00 L of a 2.00 M solution of AgNO3(aq) called solution B. You mix these solutions together, making solution C. Calculate the concentration (in M) of Na+ ions in solution C.

5. Finite Math

Find the effective rate of interest corresponding to a nominal rate of 6%/year compounded annually, semiannually, quarterly, and monthly. (Round your answers to two decimal places.)

6. Algebra

Members of the Lake Shawnee club pay \$40 per summer season plus \$7.50 each time they rent a boat. Nonmembers pay \$12.50 each time they rent a boat. How many times would both a member and a nonmember have to rent a boat in order to pay the same amount?

7. MICROECONOMICS

Suppose you currently earn 30,000 a year. you are considering a job that will increase your lifetime earnings by 300,000 but that requires an MBA. The job will mean also attending business school for two years at an annual cost of 25,000. you already have

8. math

A farmer has 200 acres of land suitable for cultivating crops A, B and C. The cost per acre of cultivating crop A, crop B and crop C is \$40, \$60 and \$80, respectively. The farmer has \$12,600 available for land cultivation. Each acre of crop A requires 20

9. Algebra

Regular pentagon ABCDE is inscribed in circle O. What is the number of degrees in the measure of angle OCE?

10. Finite Math

Find the effective rate corresponding to the given nominal rate. (Round your answer to two decimal places.) 11%/year compounded semiannually

11. Physics

A scuba diver takes a tank of air on a deep dive. The tank's volume is 10 L and it is completely filled with air at an absolute pressure of 224 atm at the start of the dive. The air temperature at the surface is 92 F and the diver ends up in deep water at

12. Physic

If 0.045 kg of ice at 0 C is added to 0.390 kg of water at 34 C in a 0.150 kg aluminum calorimeter cup, what is the final temperature of the water? Please help!

Math Word problem with factoring...HELP!!! This questions has me stumped!? I have been working on it for days... A 10ft-by-15ft pool was installed in your backyard. You have \$3000 left that you would like to spend on surrounding the pool with a patio,

14. Algebra 2

Since sound is generated by vibrations and travels in waves it can be modeled by trigonometric functions. When an object vibrates twice as fast, it produces a sound with a pitch one octave higher than before. Amplitude is associated with loudness. Suppose

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15. algebra

Lets say we have a sample of 100 bacteria in a lab that doubles every 30 minutes. What formula would we apply here and how many bacteria would you expect to find in 35 minutes?

16. Physics

1. A certain playground merry-go-round is essentially an 90-kg iron disk 2.0 m in radius. Two children, each with a mass of 46 kg, are originally standing on opposite sides of the disk near its outer edge. The merry-go-round is turning essentially without

17. chemistry

Concentrated hydrochloric acid is 38% , by mass, HCl in water. How many grams of HCl are there in 25.0 g concentrated hydrochloric acid?

18. Official meaning

What is an official? A person who holds an office. Could you please explain more to me? What is a governor? An appointed or elected official who governs a state, colony, or province for a specific term. Could you please explain more.

19. PSYCHOLOGY

Review the case scenario provided in the Learning Resources and focus on the various budget expenses related to personnel services. Review Chapter 3 of your course text, The Basics of Public Budgeting and Financial Management, and the budget template

20. MATH!

The sum of two prime numbers is the prime number 89,563. Find the smaller of the two addends. I attempted the problem but I'm not sure if it is right. 89,561 is a prime number and so is 2. So is the answer 2?

21. Math

The ratio of the perimeters of two similar squares is 5 to 4. If the area of the smaller square is 32 square units, what is the area of the larger square?

22. Math

A pond 100 ft in diameter is surrounded by a circular grass walk 2 feet wide. Find the are of the walk. Answer in terms of π. Please help me! TY

I marked my answers with ^. I need better understanding if i get these right or wrong i need to what the correct answer is and what makes it right. 1. Byron’s Don Juan is considered a mock epic because (1 point) -the hero chases women instead of getting

24. PLANNING AND BUDGETING

Week 3 Application: Case Scenario Capital Improvement Plan Background Every two years, the city prepares a capital improvement plan (CIP), which forecasts capital improvement needs, revenues, and expenditures. This year you have been asked to submit

25. physical science

all of the following are true about water except that it

26. precalc

I am really struggling with a bunch of problems. Any help with any of the following would be greatly appreciated. Thanks 1. ln e^(ln x) - ln(x - 3) = ln 8 2.3e^(6x - 2) = 18 The word problems, especially, are killing me. 3. In the formula A = Iekt, A is

27. Math

I know that I have to use log to solve, but I am having a hard time with the word problems. Please help Coffee is best enjoyed at a temperature of 121° F. A restaurant owner wants to discover the temperature T at which he should serve his coffee so that

28. MATH

In the equation 4*ABCDE= EDCBA each letter represents a different nonzero digit. Determines the sum A+B+C+D+E i don't know how to do this

29. Algebra

Which digit will appear in the 534th place after the decimal point in the decimal representation of 5/13?

30. Chem, Oxidation

Complete and balance the following half-reactions. In each case indicate whether the half-reaction is an oxidation or reduction. (Use the lowest possible coefficients. Include states-of-matter under SATP conditions in your answer.) OH ‾(aq) ¨ O2(g) I

31. Math

pls could you help me this question find higher derivative (d^2 y)/(dx^2 ) y=2x^5+3sin2x-4x+cos2x+ln2x^5

32. Lord Selkirk

Lord Selkirk was actually Thomas Douglas right? He was just called the fifth Earl of Selkirk, which meant "man with a vision". Selkirk overlooked the difficult climate of the region, which was much harsher than the climate of Scotland. Upon learning of

33. geometry

The radius of a circle is 6cm and the arc measurement is 120 degrees, what is the length of the chord connecting the radii of the arc?

34. Governor

Who was Miles Macdonnel? He was first governor of Red River Colony and had a share in the HBC company. He bought land in the Red River Valley to provide a home for the Scots that were poor, and he didn't want to give any part of the land to the NWC. He

35. Math/Algebra

If you have 36ft of fencing, what are the areas of the different rectangles you could enclose with the fencing? Consider only whole-number dimensions. This problem confused me. Any help??

36. medical billing

reimbursement methodologies

37. Grammar

Write two sentences that use a colon correctly. Make sure the two uses are different from each other. 1. Brianna can only think of one thing: winning the game. 2. I only like certain vegetables: peas, green beans, broccoli, and cauliflower.

38. ENGLISH

Explain the initial steps of writing an essay. Identify how your audience, purpose, and content will influence your approach.

39. Math

In how many different ways can you arrange three 4x8 tiles to form a rectangle? I don't know how to do this.

40. Physics

You have been sent in a small spacecraft to rendezvous with a space station that is in a low circular Earth orbit, say, with a radius of 6,720 km, approximately that of the orbit of the International Space Station. Due to mishandling of units by a

41. algebra 2

can someone tell me how to expand the bionomial (d-2)^6?

42. math

Copy each equation in Exercises 31–33. Replace the boldface italic letter with a number that shows the relationship indicated in the table. Then copy each table and complete it by using the corresponding equation. 32. y= -x+b x y B 1 0 1 2 -1 1 8 -7 1 10

43. Math

determine the length of the sides and the measures of the angles for the congruent quadrilaterals B'C' (On the picture it shows 50 degrees for B'C'(which is on the left hand side) and 9 for D'A' (On the right hand side)the picture shows that it is upside

44. chemistry

if 25 moles of sodium phosphate are reacted with potassium hydroxide, how many grams of potassium phosphate will form?

45. Spanish

39. Mi padre le compró a mi madre algo ______: una pulsera muy bonita con su nombre. a. encantada b. fascinante c. divertida d. personal I understand the meaning of this but I don't really get which option would work.. 40. Muchos ______ fueron al baile.

46. Chemistry

A quantity of sulfuric acid is added to 100. mL of water. The final volume of the solution is 111 mL and has a density of 1.14 g/mL. What mass of acid was added? Assume the density of the water is 1.00 g/mL.

47. Algebra

40. The graph of the following system yields perpendicular lines. x + 2y = -10 -4y = 2x + 20 (True?) 47. The graph of the following system yields parallel lines. 2y = -10 + x -4y = 2x + 20 (True) 48. The graph of the following system yields parallel lines.

48. Science

Hi Just want to know if water from a 20mm Polyethylene pipe under pressure of 3 bars passes to a 25mm polyethylene will cause a slight increase in volume output with a little drop in pressure? If yes then to obtain this benefit , up to whay size can we go

49. Algebra

The numbers a and b are consecutive positive integers, and a < square root 200 < b. What is the value of the product ab?

50. Basic Marketing

A large number of forces shape the marketing environment. The technological environment is one of the most important today. Discuss the impact of technology on marketing including, the opportunities, challenges and ethical issues technology poses for

52. Math

what is the answer to 3.2m+1.2=4.56?

53. Psychology

What is the advantage and disadvantage of the survey method on whether a given political candidate will be popular with Latino voters?

54. english

David is the 7th president of the club. How can I ask a question from this sentence,the answer of which is 7th?

55. Chemistry

Water does not easily remove grease from dirty hands because grease is nonpolar and water is polar; therefore they are immiscible. The addition of soap, however, results in the removal of the grease. Examine the following structure of soap and explain why

is this a runon sentence? He quit smoking five years ago, he still craves a cigarette from time to time.

57. Math

One glass of milk has 1/3 chocolate syrup. Another glass that is twice as large as the first glass contains 1/4 chocolate syrup. If you put them together, How much of the new mixture is syrup?

explain the stages in the retail life cycle and the different strategies that a manager can employ inorder to maximise returns

59. algebra

On three consecutive passes, a football team gains 5 yards, loses 21 yards, and gains 13 yards. What number represents the total net yardage?

60. chemistry

90.92% of the atoms have a mass of 19.988 u, 0.26% of the atoms have a mass of 20.983 u and 8.82% of atoms have a mass of 21.978 u. Calculate the average atomic mass of this element

61. Physics

Inside the cylinders of a diesel engine, the mixture of fuel and air is compressed to about 1/20 of its original volume. Although diesel engines have no spark plugs to ignite this mixture, it ignites anyway because of what?

62. Chemistry

A rock containing 238U and 206Pb was examined to determine its appropriate age. The molar ratio of 206Pb to 238U was 0.1462. Assuming no lead was originally present and that all lead formed remained in the rock. What is the age of the rock in years? The

63. science

How can environmental factors determine a feature in a species?

64. calculus

What is the indefinite integral of 6/(x ln(2x)??

65. geometry

Which of the following are measurements of the sides of a right triangle? Select one of the options below as your answer: A. 3, 4, 5 B. 28, 26, 12 C. 17, 14, 6 D. all of the above

66. Physic

Assume all temperatures to be exact. An aluminum spoon at 84 degree C is placed in a Styrofoam cup containing 0.180 kg of water at 12 degree C. If the final equilibrium temperature is 21 degree C and no heat is lost to the cup itself or the environment,

67. Physic

A husband buys a helium-filled anniversary balloon for his wife. The balloon has a volume of 4.4 L in the warm store at 74 degree F. When he takes it outside, where the temperature is 55 degree F, he finds it has shrunk. By how much has the volume

68. Algebra

Need help with these-- 40. The graph of the following system yields perpendicular lines: x + 2y = -10 -4y = 2x + 20 True or False? 42. If we multiply a 2 x 2 matrix with a 2 x 1 matrix, the product is a 2 x 1 matrix. -False? Thanks -MC

69. Spanish

46. ¿Ves a Eduardo? ¿Quién es la joven con quien _____? a. están jugando tenis b. está hablando c. estás pasándolo bien d. estoy bailando B? 47. "Mama, quiero saber qué me dan tú y papa." "Yo, _____ unos aretes de Mexico; el regalo de papa va a

70. Life orientation

I hv chosen de disease as hiv.de question sys in 10-15 lines criticaly discus 5 ways in which the human or environmental problem impacts on de comunity

71. Math

fernando's soccer team played a good season. Finishing with 16 wins and 4 losses. Ties are not allowed. If winning or losing a game was equally likely, what is the probability that fernando's team ended up with this record? My Answer: C(20,16)(.5)^16(.5)^4

72. grammar

Write two sentences that each use a semi-colon correctly. Make sure the two uses are different from each other. 1. There are many ways to get to the park; however, this is the easiest way. 2. My birthday is October 23, 1989; Mike’s birthday is August 31,

73. Grammar

Write three sentences that use an apostrophe correctly. One sentence must use an apostrophe with a plural noun that ends in "s". The other two sentences must use the apostrophe in two different ways. 1. Tom’s room is unorganized. 2. I believe

74. Grammar

Find seven different sentences that correctly use a comma in seven different ways. Following each sentence, write the comma rule that is demonstrated. 1. It's very likely, particularly if your child is named Isabella, Jacob, or even Maci. (Commas between

75. us history

Passed in 1935, Roosevelt's most significant reform measure was the A. Wagner Act. B. Social Security Act. C. National Labor Relations Board. D. Fair Labor Standards Act.

76. logos

i need some amazing logos can u help

No one can predict a natural disaster or world crisis. When a hurricane or flood or a pandemic strikes a country, who is most likely to respond first? Which economic system is the best solution for handling a crisis of epic proportion?

78. science

what contains DNA? where is DNA found?

79. EXP 105

Zora’s lemon tree produces too much fruit. She gives them away, therefore to her friends and neighbors.

80. Math

Given a+b+c+d=45 and a+2=b-2=2c=d/2 compute a+b+c-d

81. Physiology

what causes calcium to be released in sliding filament action for muscle contraction?

82. Statistics

Suppose that heights of newborns are bell shaped with a mean of 6.8 pounds and a standard deviation of 1.3 pounds. What percentage of weights are: a) Below 6.8 lbs.? b) Above 8.3 lbs.?

83. Linear Algebra

Let A be a 4¡Á4 matrix with real entries that has all 1's on the main diagonal (i.e. a11 = a22 = a33 = a44 = 1). If A is singular and ¦Ë1 = 3 + 2i is an eigenvalue of A, then what, if anything, is it possible to conclude about the values of the

84. coputer

I have a project regarding the basics of application software, software ownership rights; commercial software,shareware,fireware, public domain software how it impacts in my field and Ethical or Legal Impacts in my field.

1. Find the distance between the pair of points. Round to the nearest tenth is necessary. (-13, -8) and (6, 17) a. 11.4 b. 12.1 c. 31.4 d. 23.7 is the answer c? 2. Find the distance between the pair of points. Round to the nearest tenth, if necessary.

86. geometry

Triangles ABC and PQR are similar with m angle A = m angle P and m angle B = m angle Q. If AB, BC, and AC are 3, 4, and 5 ft long respectively and QR is 10 ft, find PQ.

Which economic systems do you think is the best solution for handling a crisis of epic proportion

88. Algebra

Train A is traveling at 100 mph and train B is traveling at 104 mph. Train A passes a station at 12:15 p.m. If train B passes the same station at 12:45 p.m., at what time will train B catch up to train A? HELP please I am drawing a complete balank at

89. child care

which of the following is the primary function of certification?

90. English

In the book "Of Mice and Men" by John Steinbeck, Why does steinbeck describe Lennie in animalistic terms?

91. Calculus 3

Find the average value of the squared distance between the origin and points in the solid paraboloid D={ (x,y,z): 0 ≤ z ≤ 4 - x^2 - y^2} I have no idea how to start this.

92. arithmetic

Write the nth term of the following sequence in terms of the first term of the sequence. 10, 20, 40, . . .

93. computer question

The project that I have is on chaper 6 on my text book which is the "Application Software" which includes the Software Ownership rights for the Commercial Software, Shareware, Freeware, Public domain software. I have to discuss the Ethical or Legal

94. computer question

let me change my question let me state is this way...what are the ethics or legal impacts of the application software...

95. EDU230

Why is classroom management a critical focus of effective instruction?

96. accounting

Diamond Company produces a chair that requires 5 yds. of material per unit. The standard price of one yard of material is \$7.50. During the month, 8,500 chairs were manufactured, using 43,700 yards at a cost of \$7.60. Determine the (a) price variance, (b)

97. math

Help!! how do you make two numbers with decimals into compatible numbers in order to divide them???

98. English

Choose the sentence with the grammatical error below. Answer A In his autobiography, Benjamin O. Davis, Jr., who in 1970 retired from the Air Force as a three-star general, describes his efforts to gain professional recognition for himself and for other

99. Grammar

Write one sentence that includes a city and state in the united states and the name of a college or university. Edison University is located in Piqua Ohio.

100. Algebra II

Hyperbolas: Could someone please tell me how to determine if the following indicate the foci are on the x-axis or the y-axis? x^2/4 -y^2/16 = 1 x^2/49 - y^2/9 = 1 x^2/36 - y^2/16 = 1 please explain how to set the equations up thank you

101. Alg. 2

determine if equation represent ellipse or hyperbolas. Example 4x^2 = 5y^2 + 6

102. Math

Integrate[[E^(y/x),{y,0,1},{x,y,1}] Solution:0.859141 or .5*(e-1) I can't figure out what to do,and I tried substitution.

103. About the Red River Colony

How did the conflict occur? Was it just because of the land? I'm having some trouble understanding. Please explain to me.

A business is an institution that exist to serve the need of people for goods and services in a society. discuss

105. Physiology

what does skin have to do with bone formation?

106. Physiology

how do regions of the brain control motor neurons?

107. health care ECONOMICS

How did the Haiti disaster affect healthcare costs in the United States in the short run

108. Who were "Middlemen"

They were people that acted as dealers between two parties who wanted to exchange goods. Could you please give me more information on this, no sites, just from top of your head, thanks very much:)

109. Statistics

Hi I am a college student in wireless technology but am only very sketchy on statistics. I'm am trying to write a program to tell me if activity is unusual. I can read the activity of a person from a motion detector from day to day i.e. mon activity - 250

110. Information Systems

You perform a bittorrent search and get no responses. List several possible causes. Then describe how you would teast each.

111. geometry

what is the area of a regular polygon with 13.8 area and 6 sides

112. History

What was significant about the Third Aliyah?

113. Chemistry

How much energy in KJ is release to form one mole of 123Sb from protons and neutrons if the atom has a mass of 122.90422 amu? Please remember to include the mass of electrons in calculations.

114. Statistics

Question 1: Marks: 2+2+4+2=10 By using five number summary, suggest the skewness of the data from the following information: What is the usefulness of Pearson’s coefficient of skewness? For a certain data, Find moment ratios and . Interpret your results

115. Thermodynamics

1,3-diphosphoglycerate (1,3-DPG) is a molecule that can be used to regenerate ATP in the body. Explain how this is possible given the coupled reactions below. 1,3-DPG „³ 3-DPG + PO43- ƒ´G = -49 kJ ADP + PO43- „³ ATP ƒ´G = 31 kJ

116. Chemistry

How much time in years (assume a 365 day yr) would it take for a 1.6678g sample of 239Np to decay to a mass of 0.8671g if it has a half life of 2.030*10^5s

117. Com/155

Did I pick the correct pronoun? I had to sit down with my sister the other day about her spending habits. Her being the pronoun.

118. physics

7. Imagine that the coefficient of kinetic friction between a certain 15-kg box and the floor is 0.35. How hard would you have to push on it to move it at a constant speed of 2.6 m/s across the floor?

please help me solve these 1. 2√5/8 + 4√3/8 - 1/2√68 2. √4k-5 +1=8 (the radical sign goes over 4k-5) 3. (x+4)*2 /3 =8 4. Write the value of the discriminant of each equation. Then use it to decide how many different real-number roots the equation

120. Biology

What is combined in the chloroplast to make glucose?

121. Biology

What are the three types of fibers which comprise the cytoskeleton?

122. Abstract Algebra

Let ø: G--> G' be a homomorphism from the group G to the group G'. Prove that ø(a)= ø(b) if and only if ab^-1 exists in Ker(ø).

123. calculus

Sketch the region enclosed by the given curves. Decide whether to integrate with respect to x or y. Draw a typical approximating rectangle and label its height and width. y=4+ sq. root of (x), y=(8+x)/2

124. heart

What causes the heart to move? Is that movement called a beat?

125. Algebra

Peter painted 1/3 of a room while Joe painted 2/5 of the same room. It then took Peter 1 hour, 40 minutes to finish painting the remainder of the room by himself. In how many hours could Peter have painted the entire room by himself? Express answer as a

126. To haseeb

I have removed your post because you included your email address, which is not a very good idea on the Internet. In addition, we tutor on these message boards; we do not do anything via email. That's another safety thing. I don't know if any of our tutors

127. english

hoe to diagram the white cat sleeps quietly

129. marketing

Some firms are too production-oriented and inefficient. That can result in customers who are not satisfied and micro-marketing that can cost too much. Identify and explain at least three reasons for these marketing inefficiencies.

130. Math.

1. 1/2(y-2)+2=3/8(3y-4) 2. Is 4 a solution? 3. Describe the process for finding out whether 4 is a solution to this equation.

131. UNCP

Please Explain why small effect size occurs in nursing studies?

132. English

Choose the sentence with the grammatical error below. Answer A Seeking food in the rain-forest canopy, common marmosets often live in proximity to spider monkeys, which are ground-dwellers. B A consummate craftsperson, the lace doilies are made with more