# Questions Asked onNovember 17, 2013

1. ## Chemistry

Buffer capacity is a measure of a buffer solution\'s resistance to changes in pH as strong acid or base is added. Suppose that you have 165 mL of a buffer that is 0.360 M in both benzoic acid (C6H5COOH) and its conjugate base (C6H5COO–). Calculate the

2. ## Calculus - Optimization

A fence is to be built to enclose a rectangular area of 800 square feet. The fence along 3 sides is to be made of material \$4 per foot. The material for the fourth side costs \$12 per foot. Find the dimensions of the rectangle that will allow for the most

3. ## college algebra

In 4 years, 30% of a radioactive element decays. Find its half-life. (Round your answer to one decimal place.) _____ yr

4. ## college algebra

An isotope of lead, 201Pb, has a half-life of 8.4 hours. How many hours ago was there 40% more of the substance? (Round your answer to one decimal place.) ____hr

1. Carmen Santiago works for a number of businesses as a “consultant.” She has helped design accounting systems, provided accounting services, and analyzed the financial strength of her clients’ businesses. Carmen is working as a A. public

6. ## geometry

What is the altitude of a rhombus if its area is 50 square meters and the length on one side is 12.5 meters? A. 10 m B. 4 m C. 7.5 m D. 12.5 m

7. ## Help with Science

1. Which of the following is an example of an environmental pressure? A. The air pressure in the atmosphere. B. A lake that is gradually running out of water. C. A fight between two members of the same species. D. Breeding between two members of the same

8. ## wlac

Kit borrowed \$15,500 at 11% ordinary interest for 120 days. After 70 days, she made a partial payment of \$3,000. What is the final amount due on the loan?

9. ## math

judy is planning a party for her young sister. she has 36 prizes and 24 balloons. what is the greatest number of children that can attend the party so that each child gets an equal number of prizes and its equal number of Balloons

10. ## math

two of the angels in a triangle measures 48 degrees and 79 degrees. what is the measure of the 3 angle?

11. ## internet basics

seeing an error message on the screen after you click on a link or icon may indicate that your pc doesn't have the correct ? to view the information your looking for a.ISP b.plug ins my answer is a

12. ## statistics

Randomly selected students participated in an experiment to test their ability to determine when one minute(or sixty seconds) has passed. Forty students yielded a sample mean of 61.8 seconds. Assuming that o= 11.7 seconds, Construct and interpret a 99%

13. ## geometry

A monument in the form of a marble cylinder has a circular base with a radius of 1.5 meters. The altitude of the monument is 3.5 meters. How many cubic meters of marble does this monument contain? A. 7.07 m^3 B. 21.21 m^3 C. 24.74 m^3 D. 6.19 m^3

14. ## introduction to health care

coders play an important role in a.reimbursement and research b.managing release of patient information c.health record documentation d.denying medical claims my answer is a

15. ## introduction to health care

court awarded compensation for humiliation suffered through professional negligence is an example of a ? damage a.pecuniary b.general c.non pecuniary d.punitive my answer is a

16. ## Math

An irrigation pump can pump 250 liters of water per minute. How many hours should the system work to water a rectangular ﬁeld 75 m by 135 m to a depth of 3 cm?

17. ## math urgent

what number has the prime factorization of 2 to the 6th power and 5 to the 6th power

18. ## algebra

Remove the parentheses from the following expression, and combine like terms: (2x + 3y – 4z) – (x – y – z) A. 3x + 4y + 5z B. 3x + 4y – 3z C. x + 4y – 3z D. x + 2y – 5z

19. ## grammar

Which part of speech is the capitalized words in this sentence? Four score and seven years ago our fathers brought forth on this continent, a NEW nation, conceived in Liberty, and DEDICATED to the proposition that all men are created equal. Now we are

20. ## Math

An irrigation pump can pump 250 liters of water per minute. How many hours should the system work to water a rectangular ﬁeld 75 m by 135 m to a depth of 3 cm?

21. ## Chemistry

How could 2 molecular compounds react to create a precipitate and an aqueous solution?

Find the installment price of a recliner bought on the installment plan with a down payment of \$90 and six payments of \$109.86

23. ## statistics

A random sample of 100 students from a high school was selected. If a 98% confidence interval estimate for the mean age of students is calculated to be 14.2511 to 14.9489, then the standard deviation of the sample mean is?

24. ## English

1. If I should win the lottery, I will buy everything. 1-2. Should I win the lottery, I will buy everything. 2. If I were rich, I could buy Glalaxy 4. 2-2. Were I rich, I could buy Galaxy 4. 3. If I had studied harder, I would have got better grades. 3-2.

25. ## Algebra

What is the riddle to Algebra with Pizzazz worksheet number7?

26. ## Statistics

Of 500 randomly selected people in new york city, 210 people had O+ blood. "58 percent of the people in NYC do not have type O+ blood" Is the statement descriptive statistics or inferential statistics?

27. ## chemistry

determine the density in copper at 1305K. 1 mole of vacancies in copper is 104kJ. The answer I calculated this time is 8.4572*10^22. I am not sure if this correct. Thanks.

28. ## Math

Suppose the first Friday of a new year is the fourth day of that year. Will the year have 53 Fridays regardless of whether or not it is a leap year? What is a rule that represents the sequence of the days in the year that are Fridays? How many full weeks

29. ## Physics

An electric heater warms a large 0 degree Celsius block of ice at the rate of 200J/s . calculate the mass of the ice that melts in 10 minutes

How to write 0.023494751 and 0.040381247 as a percent rounded to one decimal? Would it be 2.3% and 4.0%?

31. ## accounting

Exercise 5-3 Analyzing and recording merchandise transactions-both buyer and seller LO P1, P2 Santa Fe Company purchased merchandise for resale from Mesa Company with an invoice price of \$16,000 and credit terms of 3/10, n/60. The merchandise had cost Mesa

32. ## Chemistry

Hi I need help with these following questions. I have all of the data needed. Calculate the enthalpy change of the reaction for each trial (in kJ) 3. Calculate the heat released by the reaction for each trial (in J): 2. Calculate the heat absorbed by the

33. ## English

There is a placement test for Writing 121 and I need to earn a certain score as a prerequisite. What is the placement test like? Is it time?Can you give me a sample and grade it? We may have to keep track of each other posts.

34. ## chemisty

When magnesium metal and an aqueous solution of hydrochloric acid combine, they produce an aqueous solution of magnesium chloride and hydrogen gas. Using the equation, Mg (s) + 2HCl (aq) MgCl2 (aq) + H2 (g), if 24.3 g of Mg and 75.0 g of HCl are allowed to

35. ## college algebra

Solve the exponential equation using logarithms. Give the answer in decimal form, rounding to four decimal places. (Enter your answers as a comma-separated list.) 4x − 3 = 32x x = _____

36. ## BIOLOGY

b) Make a single base pair substitution mutation in the gene below that results in a protein that is shorter than the protein produce by the original gene. When you are satisfied with your change and its effect, click the "Final Check" button. Note that a

37. ## science

How much heat is gained (in Joules) by the water (qwater) when a chemical reaction takes place in 100.0 mL aqueous solution and has a temperature increase of 13.26 °C? (Remember cwater = 4.180 J/°Cg)

38. ## CHEMISTRY

In a study of the reaction of magnesium with hydrochloric acid, two experiments were carried out. Each uses 1 g of magnesium ribbon, and 50 mL of hydrochloric acid was added to each reaction flask. One of the hydrochloric acid solutions added was more

39. ## Math

Tell whether the sequence is arithmetic. If it is, write a function rule to represent it. 0.2, -0.6, -1.4, -2.2 This is an arithmetic sequence, but I do not understand the function rule of A(n) = 0.2 - 0.8(n-1), which is the given answer.

40. ## CHEMISTRY

The temperature at which molarity of pure water is equal to its molality

41. ## English

1. If he should go there, he would be killed. 2. Should he go there, he would be killed. 3. If you would try harder, you would surely succeed. 4. Would you try harder, you would surely succeed. 5. If I were to be young again, I would marry her. 6. Were I

42. ## English

1. If I were to be young again, I would marry her. 2. If I were to be young again, I will marry her. (Is #2 grammatical?) 3. If he should go there, he would be welcomed. 4. If he should go there, he will be welcomed. (Are these two sentences grammatical?

43. ## Please check if these math questions are correct

8 = p - 5 Answer: p = 13 21 + y = 35 Answer: y = 14 6x = 54 Answer: x = 9

44. ## Calculus

ohaganbooks is offering a wide range of online books, including current best-sellers. a colleague has determined that the demand for the latest best selling book is given by q=(-p^2)+33p+9 (18

45. ## Marketing

Discuss in detail several psychological purchasing variables and why they are important to marketers

46. ## math

What is the best sequence of names to identify this set of numbers? (1 3/5,-10, 0.51(the one is repeating), TT,17) 1.(rational,integer,irrational,irrational,natural) 2. (rational,irrational,rational, irrational, whole) 3.rational,real,rational,real,

48. ## chemistry

How many moles of sodium chloride are in 711 mL of a 2.01 M solution of sodium chloride

49. ## Calculus

Suppose that a population develops according to the logistic equation dP/dt = 0.06P−0.0001P^2 where t is measured in weeks. 1) The carrying capacity is . 2) The growth rate k is . Use your calculator to sketch a direction field for this equation. Sketch

51. ## understanding and managing money

Carmen Santiago works for a number of businesses as a consultant. She has helped design accounting systems,provided accounting services,and analyzed the financial strength of her clients'businesses. Carmen is working as a?

This homework question was removed due to a copyright claim submitted by the National Network of Digital Schools Management Foundation (NNDS).

53. ## physics

A man seeking to set a world record wants to tow a 104,000-kg airplane along a runway by pulling horizontally on a cable attached to the airplane. The mass of the man is 93 kg, and the coefficient of static friction between his shoes and the runway is

54. ## Density Problem

The moon has radius 1740 km and mass 7.35x10^22? kg.What is its average density?

55. ## math

If anyone has "For All Practical Purposes" I am stuck on page 680, Writing Project # 2. It is just to long to post.

57. ## Pre-Calculus

Find the slope of the tangent line to the curve 2(x^2+y^2)^2=25(x^2−y^2) at the point (−3,−1)? Here's what I did: 2(x^4 + y^4) = 25(x^2-y^2) 2x^4 + 2y^4 = 25x^2 - 25y^2 8x^3 + 8y^3(dy/dx) = 50x - 50y(dy/dx) d/dx(8y^3 + 50y) = 50x - 8x^3 d/dx =

58. ## chemistry

Knowing that the energy associated with the formation of 1 mole of vacancies in copper (Cu) is 104 kJ, determine the vacancy density (nv/cm3) in Cu at 1284 K. Assume the pre-exponential factor is one. unanswered

59. ## chemistry

The Young's modulus for a material is 15.0 x 1010 N/m2. The material is stretched to a strain of 6.0 x 10-3. How much elastic energy will be expended? (Express your answer in J/m3)

60. ## chemistry

The Young's modulus for a material is 15.0 x 10^10 N/m2. The material is stretched to a strain of 6.0 x 10^-3. How much elastic energy will be expended? (Express your answer in J/m3)

61. ## chemistry

A p-n junction is obtained at a depth of 3 x 10-3 cm below the surface by diffusion of antimony (Sb) into p-type germanium. What is the donor concentration in the bulk germanium if the diffusion is carried out for three hours at 790 C? Express your answer

62. ## Social Studies (History)

federalists believed in a) free trade b) state banks c) a national bank d) rule by the people my answer is C

63. ## Physics

two hundred fifty grams of iron is heated from 27 degree Celsius to 300 degree Celsius . how much ice can be melted and raised to a temperature of 27 degree Celsius by hot iron?

64. ## math check

what is half the difference between 187 and 49? 187-49= 138/2 answer is 69?

Larsen’s Sharpening Shop, specializes in sharpening saws. Terry Larsen has determined that the cost of operating the shop is given by the function: C(x) = x^2 – 40x + 430, where x is the number of saws sharpened daily. a. Write C(x) = x^2 - 40x + 430 =

66. ## geometry

The sides of a triangle are 8,15 and 18 the shortest side of a similar triangle is 10 how long are the other sides? Find the scale factor of similar triangles whose sides are 4,12,20 and 5,15,25 Assume that traingle xyz is similar to triangle rpn with

67. ## Math

With these ideas in mind, evaluate—in a paragraph each—the following data depictions. U.S. Federal Budget Policy Outlays by Category for 2015. (U.S. Federal Budget for 2011.) p. 153. This display shows expected expenditures of the federal government in

68. ## Algerba!

Solve inequality and put solution set in interval notation. z^2+2z+6>0

69. ## algebra

Solve. 9 = 2y - 1 = 7y the way to solve this is right on the tip of my tongue but i can't remember exactly how to do it.

70. ## Chemistry

The Young's modulus for a material is 2.0 x 1010 N/m2. The material is stretched to a strain of 5.0 x 10-3. How much elastic energy will be expended? (Express your answer in J/m3)

71. ## chemistry

I have been having a problem with solving a chemistry problem. The problem requires finding the density in copper at 1305K (the temperature changes when you reset the problem). I think I am using the proper formula, (N_v/N_s=Ae^-changeH_v/kT). My results

72. ## chemistry

I have been having a problem with solving a chemistry problem. The problem requires finding the density in copper at 1305K (the temperature changes when you reset the problem). I think I am using the proper formula, (N_v/N_s=Ae^-changeH_v/kT). My results

73. ## Science

A pelican flying along a horizontal path drops a fish from a height of 125 m while traveling 40 m/s. How far does the fish travel horizontally before it hits the water below?

74. ## Social Studies (History)

What dived the Federalists and hurt John Adams chance for reelection? a) states rights b) a treaty with France c) Neutrality Act d) war with France my answer is a treaty with Franc

75. ## Algebra! any kind of help on this question!

Larsen’s Sharpening Shop, specializes in sharpening saws. Terry Larsen has determined that the cost of operating the shop is given by the function: C(x) = x^2 – 40x + 430, where x is the number of saws sharpened daily. a. Write C(x) = x^2 - 40x + 430 =

76. ## understanding and managing money

Guaranteed replacement cost in a homeowner's insurance policy means that the insurance company?

77. ## geometry easy

The sides of a triangle are 8,15 and 18 the shortest side of a similar triangle is 10 how long are the other sides? Find the scale factor of similar triangles whose sides are 4,12,20 and 5,15,25 Assume that traingle xyz is similar to triangle rpn with

78. ## chemistry

Knowing that the energy associated with the formation of 1 mole of vacancies in copper (Cu) is 104 kJ, determine the vacancy density (nv/cm3) in Cu at 1085 K. Assume the pre-exponential factor is one. unanswered

How to change 84.9% and 88.1% to a decimal? Would it be 0.849 and 0.881?

80. ## statistics

A fertilizer mixing machine is set to give 4 kg of nitrate for every quintal bag of fertilizers. Five 100 kg bags are examined. The percentages of nitrate are: 2, 6, 4, 3, 1. is there reason to believe that the machine is defective?

81. ## math check

what unit of measure would you use to describe the distance from your house to school? D. Meters a.grams b. kilometers c. liters d. meters

82. ## calculus

A traveller employs a man to drive him from Sydney to Melbourne. Running costs of the car, which are also paid by the traveller, are k*v^3 dollars per hour, v is the speed and k is a constant. Find the uniform speed that will minimize the total cost of the

83. ## calculus

The cost of running a ship at a constant speed of v km/h is 160 + 1/100*v^3 dollars per hour. a)Find the cost of a journey of 1000km at a speed of v km/h. b)Find the most economical speed for the journey, and the minimum cost. c)If the ship were to have

84. ## calculus

Find a function f from R to R such that f is continuous at only one point?

85. ## science

what is the reason for building ponds the internet not saying

86. ## algebra

Solve. -1 = 1/2h - 7 - 3/4h what's the easiest way to get the answer to this? :o

87. ## Math:)

This homework question was removed due to a copyright claim submitted by the National Network of Digital Schools Management Foundation (NNDS). Thank you!:)

88. ## Algebra 1 Problem

This homework question was removed due to a copyright claim submitted by the National Network of Digital Schools Management Foundation (NNDS). Thanks!

89. ## physics

A wrecking ball (weight = 4880 N) is supported by a boom, which may be assumed to be uniform and has a weight of 3520 N. As the drawing below shows, a support cable runs from the top of the boom to the tractor. The angle between the support cable and the

90. ## math check

how much time elapsed from 4:43am unto 12:04 pm? 7hrs 21 mins

91. ## chemistry

1. A website promoting the use of alternative energy vehicles and hybrid technologies claims that, \"A typical automobile in the USA uses about 40 gallons of gasoline every month, producing about 750 lbs of carbon dioxide.\" To determine the truth of this

92. ## science

Balancing equations a) Mg + HCl --> MgCl2 + H2 b) K + H2O --> KOH + H2 c) Li + H2O --> LiOH + H2 d) Fe + O2 --> Fe2O3 Please help

93. ## physic

Suzie (of mass 58 kg) is roller-blading down the sidewalk going 36 miles per hour. She notices a group of workers down the walkway who have unexpectedly blocked her path, and she makes a quick stop in 2 . 4 seconds. What is Suzie’s average acceleration?

94. ## internet basics

the characteristics of an istant message include all the following except a.its more structured b.it contain abbrevations c.occurs between pc's my answer is c

95. ## Math

Write this statement out as an equation and solve. If you multiply a number by 5 and then add 8, the result is 68.

96. ## Algebra

–2x(–3x ^2y)(2y) = ? A. 12x^3y^2 B. –3xy^2 C. 3xy^2 D. –12x^3y^2

97. ## chemistry

which of the following alkane names is correct? a)2-methyl-3-propylhexane b)1-methylnonane c)1,2-dimethylhexane d)4,5-dimethylpentane e)all of the above names are correct PLEASE HELP!!!!GOT STUCK ON IT

98. ## Liquid capacity of pitcher

If a ceramic pitcher is 9.5 inches tall and has a diameter that is 3 3/4 at top and 4 inches at the bottom how many ounces will it hold. There use to be a gallon ratio to inches and you could deduct 30 percent for variating diameters. Do you know the

99. ## physics

a wooding block of mass 7.6kg rest on a rough horizontal surface if the surface is 8N calculate the coefficient of friction

100. ## Chemistry

Buffer capacity is a measure of a buffer solution\'s resistance to changes in pH as strong acid or base is added. Suppose that you have 165 mL of a buffer that is 0.360 M in both benzoic acid (C6H5COOH) and its conjugate base (C6H5COO–). Calculate the

101. ## Statistics

A credit manager has chosen a sample of size 2,164 to estimate the mean balance of credit accounts to within \$0.50. A pilot study of 50 accounts had a mean of \$1,219 and a variance of 100. The level of confidence of the interval is: 90% ? 95% ? 98% ? 99% ?

102. ## Stats

A test of hypothesis is performed to determine whether the proportion of Montrealers (population 1) who want the decriminalization of marijuana is greater than the proportion of Torontonians (population 2) who want decriminalization of marijuana. A random

103. ## Chemistry

Calculate the pH for each of the following points in the titration of 50.0 mL of a 2.7 M H3PO3(aq) with 2.7 M KOH(aq). (a) before addition of any KOH (b) after addition of 25.0 mL of KOH (c) after addition of 50.0 mL of KOH (d) after addition of 75.0 mL of

104. ## physics

Calculate how thick an absorber needs to be to absorb 25% of the incoming light using the Lambert-Beer law for absorption. How is the small gain coefficient k of a laser defined in relation to the absorption coefficient ƒÑƒ¯

105. ## introduction to health care

supplementary health expeditures are covered by a.PIPEDA b.the Canada health act c.private insurance d.medicare my answer is c

106. ## Math

A pair of newborn male and female rabbits is placed in an enclosure to breed. The rabbits start to bear young one month after their own birth. At the end of each month, they have another male-female pair, which in turn mature and start to bear young one

107. ## Math

The Pioneer 10 spacecraft passed the planet Jupiter on December 12, 1973, and exited the solar system on June 14, 1983. The craft traveled from Mars to Jupiter, a distance of approximately 1 billion kilometers, in one year and nine months. a.Calculate the

108. ## introduction to health care

the reasonable person is a concept found in a.biometrics b.PIPEDA c.IDS d.tort law my answer is d

109. ## statistics

How large a sample would be needed to form a 90% confidence interval for the mean nicotine content of a brand of cigarettes if the nicotine content has a normal distribution with sigma equal to 8.5 mg and the width of the interval (the length of the

110. ## Finance

You have just purchased a new warehouse. To finance the purchase, you have arranged for a 30-year mortgage loan for 80 percent of the \$2,800,000 purchase price. The monthly payment on the loan will be \$22,000. a. What is the effective annual rate (EAR) on

111. ## Math

Officer Weihe is in a patrol car sitting 25ft from the highway and observes Jacob in his car approaching. At a particular instant, t seconds, Jacob is x feet down the highway. The line of sight to Jacob makes an angle of theta radians to a perpendicular to

112. ## History Quote

“Man is not made better by being degraded; he is seldom restrained from crime by harsh measures, except the principle of fear predominates in his character; and then he is never made radically better for its influence.” - Dorothea Dix What exactly does

Hello! I have two math questions: 1.) Marcos has 28 coins that are all nickels (n) and dimes (d). The value of the coins is \$2.05. Which system of equations can be used to find the number of nickels and the number the dimes? A. n + d = 28 5n + 10d = 205 B.

114. ## iduction to health care

the overall responsibitity of health information management professionals is a.accurately coding hospital records for reimbursement purposes b.ensuring the quality and accuraxcy of health information c,overseeing the medical transcription process

115. ## PHYSICS HELP

A pulley of mass mp , radius R , and moment of inertia about its center of mass Ic , is attached to the edge of a table. An inextensible string of negligible mass is wrapped around the pulley and attached on one end to block 1 that hangs over the edge of

116. ## POL 201

Separation of powers entails three distinct branches of government so that

117. ## solid chemestry

Knowing that the energy associated with the formation of 1 mole of vacancies in copper (Cu) is 104 kJ, determine the vacancy density (nv/cm3) in Cu at 1197 K. Assume the pre-exponential factor is one.

118. ## introduction to health care

which of the following statements is true a.doctors are held to the same reasonable person standard as the general public b. professional standards cans determine if negligence has occurred my answer is b

119. ## math

how to convert 5/8 to a decimal

120. ## geometry

If a decorative sign in the form of a circle has a diameter of 10 feet, what it the area of the sign, to the nearest square foot? A. 79 ft2 B. 16 ft2 C. 157 ft2 D. 31 ft2

121. ## Math

A pair of newborn male and female rabbits is placed in an enclosure to breed. The rabbits start to bear young ONE MONTH after their own birth. At the end of each month, they have another male-female pair, which in turn mature and start to bear young ONE

122. ## Chemistry

I posted a question earlier today to determine the vacancy density in copper. The formation of 1 mole in Cu is 104kJ. Temperature is 1305K. My result is -2.19*10^-22. This does not look right to me. Any ideas. Thanks.

123. ## Physics

In the figure, a small 0.458 kg block slides down a frictionless surface through height h = 1.05 m and then sticks to a uniform vertical rod of mass M = 0.458 kg and length d = 2.70 m. The rod pivots about point O through angle θ before momentarily

124. ## Physics

A uniform solid ball rolls smoothly along a floor, then up a ramp inclined at 13.5 degrees. It momentarily stops when it has rolled 1.65 m along the ramp. What was its initial speed?

125. ## stats

The probability that an individual has hearing loss is .40. The probability that an individual has poor eyesight is .55. If hearing loss and poor eyesight are INDEPENDENT events, what is the probability of a person with hearing loss and poor eyesight?

126. ## biology mit

b) Make a single base pair substitution mutation in the gene below that results in a protein that is shorter than the protein produce by the original gene. When you are satisfied with your change and its effect, click the "Final Check" button. Note that a

127. ## stats

how to find the are for a standard normal curve that cuts off the upper 1.1%

128. ## Math

A pair of newborn male and female rabbits is placed in an enclosure to breed. The rabbits start to bear young TWO MONTH after their own birth. At the end of each month, they have another male-female pair, which in turn mature and start to bear young ONE

129. ## art

what type of lines do you see in the art piece Kerry James Marshall 1994?

130. ## Math

Concrete forming tubes are used as molds for cylindrical concrete supports. The volume V of a tube is the product of its length l and the area A of its circular base. You can make 2/3 ft^3 of cement per bag. Write a rule to find the number of bags of

131. ## Economics

A supply curve does all of the following, except: Answer Uses the ceteris paribus assumption. Holds constant time, place, income, costs of inputs, costs of substitutes, and suppliers' expectations about future prices. Shows the quantity producers are

132. ## Biology: Endotoxin

Does endotoxin refer to the LPS or to lipid A?

133. ## science

How many cups of water are needed for a plant to begin germinating?

134. ## Chemistry

Determine the empirical formula of magnesium oxide. Weight of magnesium, 0.16g, weight of magnesium, 0.24. Please use 24.31g/mol for Mg and 16.00g/mol for O

135. ## Math - Alg

1. The volume V of a right circular cylinder is given as V = pir^2h, where r is the radius of the base and h is the height of the cylinder. a. Express the height of the cylinder in terms of iuts volume and radius of the base. b. Translate the equation

136. ## Chemistry

Determine the empirical formula of magnesium oxide. Weight of magnesium, 0.16g, weight of magnesium, 0.24. Please use 24.31g/mol for Mg and 16.00g/mol for O

137. ## math

How much should Linda set aside now to buy equipment that costs 6,100 in one year? The current interest rate is 0.7% annually, compounded annually.

138. ## Math-Algebra

Given the table with values for A and r, answer the folowing: r 2 3 4 5 A 12.57 11.31 50.28 78.56 a. What equation represtnts the relationship of the values in the table above? b. Find the constant of variation. c. If r = 8, what would be A?

A real estate developer would like to analyze his revenue,cost and profit for a specific hosing project that is under construction.last month he sold 20 large houses for m\$ 250000 and 10 small houses for \$150000.The cost build large houses was

140. ## science

How many weeks does it take for a seed to start germinating? Does it depends?

141. ## math

John took out a loan for 51 months but paid it in full after 31 months. Find the refund fraction he should use to calculate the amount of his refund. would it be 51/31?

142. ## chemistry

How much energy is given off if 2.5 x 10^5 ml of water is heated from 21c to 40c by burning 10 grams of sugar? What is the fuel value on the sugar?

143. ## Math

A spider and a ﬂy are in a room that has length 8 m, width 4 m, and height 4 m. The spider is on one end wall 1 cm from the ﬂoor midway from the two side walls. The ﬂy is caught in the spider’s web on the other end wall 1 cm from the ceiling and

144. ## Math

The horsepower is a nonmetric unit of power used in mechanics. It is equal to 746 watts. How many watts of power does a 350-horsepower engine generate?

145. ## English

1. In front of the building was a supermarket. 2. In front of the building, was a supermarket. 3. In front of the building a supermarket was. 4. In front of the building, a supermarket was. (Which ones are grammatical?)

146. ## chemistry

DDD I may not be using the right formula. I am getting negative answers. Down to last chance.

147. ## Precalculus

Solve the equation for the indicated domain. sec(theta+81 degrees)=2 Theta E[0,360)

148. ## Math

Solve for X. X/8 = -4/9

149. ## English

Near the school there was a clothing store. Near the school, there was a clothing store. Near the school was there a clothing store. Near the school, was there a clothing store. (Which one is correct? Do we have to have inversion when the place adverbial

150. ## Science

Consider a c-Si solar cell whose fingers have a resistance R=10ohms. Which would be the finger´s resistance (in ohms) if the finger´s width is doubled and the finger´s height is one third of its initial value

151. ## Math- urgent

-4x-2+3x=4 What does x equal? Please show all work.

152. ## Chem Lab

What is the Molar Enthalpy of Neutralization (ÄHn) in kJ/mol if 5.00 moles of HCl(aq) (acid) neutralized 5.00 moles of NaOH(aq) (base) and released 2033 J of heat?

153. ## Algebra

Concrete forming tubes are used as molds for cylindrical concrete supports. The volume V of a tube is the product of its length l and the area A of its circular base. You can make 2/3 ft^3 of cement per bag. Write a rule to find the number of bags of

154. ## chemistry

What is the Molar Enthalpy of Neutralization (ÄHn) in kJ/mol if 5.00 moles of HCl(aq) (acid) neutralized 5.00 moles of NaOH(aq) (base) and released 2033 J of heat?

155. ## BIOLOGY

You plan to generate many copies of this gene by PCR. You will then insert the PCR product into the plasmid. d) Which two primers from the list below will allow you to use PCR to amplify this gene? Check the two that apply. 5'-GTGCA-3' 5'-CACGT-3'

156. ## science

What is the Molar Enthalpy of Neutralization (ÄHn) in kJ/mol if 5.00 moles of HCl(aq) (acid) neutralized 5.00 moles of NaOH(aq) (base) and released 2033 J of heat?

157. ## science

Calculate the Molar Enthalpy of Neutralization (ÄHn) in kJ/mol of the reaction between a monoprotic acid and a monoprotic base, given the following information: The temperature change equals 5.30°C, 50.0 mL of 1.00 M concentration of Acid 50.0 mL of 1.00

John has found a short-term investment opportunity. He can invest \$9,000 at 0.75% interest for 21 days. How much interest will he earn on this investment if the interest is compounded daily?

159. ## chemistry

ok so you have 1.76g of salicyic acid(138.12 g/mol) and with 1.11 g of acetic anhydride(102.10 g/mol) a student obtained 1.12g of acetylsalicylic acid( 180.17 g/mol) what is the percentage yield?

What is the best sequence of names to identify this set of numbers? (1 3/5,-10, 0.51(the one is repeating), TT,17) 1.(rational,integer,irrational,irrational,natural) 2. (rational,irrational,rational, irrational, whole) 3.rational,real,rational,real,

161. ## Math

There are about 7 billion people on Earth. Suppose that they all lined up and held hands, each person taking about 2 yards of space. a. How long a line would the people form? b. The circumference of the Earth is about 25,000 miles at the equator. How many

162. ## hvac

what is the difference between fall-prevention and fall-arresting equipment?

163. ## Precalculus

Solve for the equation in the given domain. (tan theta)(sec theta)=tan theta theta E{real numbers of degrees} BY THE WAY, REMIND ME IF THIS IS THE CORRECT WAY TO FIND THE ANGLE OF... sec theta=2 To find the angle do you set it up like this?? 1/(cos^-1)(2)

164. ## statistica

A management consultant has analysed a random sample of 40 large firms in order to investigate the mean annual salary of sales managers. She has constructed the following 90% confidence interval for the population mean annual salary: \$45,382 to \$48,618. In

165. ## statistics

A management consultant has analysed a random sample of 40 large firms in order to investigate the mean annual salary of sales managers. She has constructed the following 90% confidence interval for the population mean annual salary: \$45,382 to \$48,618. In

166. ## English

1. I don't have to hurry, and neither does she. 2. I don't have to hurry, and nor does she. 3. I don't have to hurry, neither does she. 4. I don't have to hurry, nor does she. (Which ones are grammatical?)

167. ## mth

Calculate the maturity value of a simple interest, eight-month loan of \$15,000 if the interest rate is 4.5%.

168. ## Math

Write a function rule for a sequence that has 25 as the sixth term. How do I do this while starting the function with A(n)?

169. ## physics

Suzie (of mass 58 kg) is roller-blading down the sidewalk going 36 miles per hour. She notices a group of workers down the walkway who have unexpectedly blocked her path, and she makes a quick stop in 2 . 4 seconds. What is Suzie’s average acceleration?

170. ## statistics

Consider an upper-tail test of hypothesis for the difference in two population means. The sample data from the first population is: n = 50, x-bar = 110, s = 10. The sample data from the second population is: n = 75, x-bar = unknown, s = 11. We conclude the

171. ## Math

Solve -4x is less then equal to -16. I got x is less then equal to 4. Is this correct I'm kind of confused with this question.

172. ## physics

A rock is suspended by a light string. When the rock is in air, the tension in the string is 38.2 N. When the rock is totally immersed in water, the tension is 28.9 N. When the rock is totally immersed in an unknown liquid, the tension is 17.4 N. What is