brenda

Most popular questions and responses by brenda
1. algebra

how many grams of 2.5% hydrocortisone cream should be mived with 360 g of 0.25 to make a 1% hydrocortisone cream

2. MATH

George saves 18% of his total gross weekly earnings from his 2 part-time jobs. He earns \$6.25 per hour from one part-time job and \$7.50 per hour from the other part-time job. George works a total of 40 hours between the two jobs each week. What additional

3. statostocs

The Precision Scientific Instrument Company manufactures thermometers that are supposed to give readings of 0°C at the freezing point of water. Tests on a large sample of these thermometers reveal that at the freezing point of water, some give readings

4. physics

A shotputter throws the shot with an initial speed of 15.5 m/s at a 32.0 degree angle to the horizontal. Calculate the horizontal distance traveled by the shot if it leaves the athlete's hand at a height of 2.20 m above the ground.

5. Math

What should you say if you see a tall, wrought-iron tower in Paris?

6. GEOGRAPHY

which of the following demographic characteristics distinguishes Europe's population from that of Asia?

7. Physics

A 123-cm-long, 5.00 g string oscillates in its n = 2 mode with a frequency of 200 Hz and a maximum amplitude of 4.50 mm. What is the tension in the string?

8. Chemistry

C2H2(g) + 2 H2(g)--> C2H6(g) Information about the substances involved in the reaction represented above is summarized in the following tables. Substance/ So (J/mol∙K) /∆Hº!@#\$%^&J/mol) C2H2(g) / 200.9 / 226.7 H2(g) / 130.7 / 0 C2H6(g)/ ?? / -84.7

9. math

If you diluted 230 ml of 8% benzocaine lotion to 5%, how much could you produce?

10. chemistry

C2H2(g) + 2 H2(g)--> C2H6(g) Substance So (J/mol∙K) ∆Hº!@#\$%^&J/mol) C2H2(g 200.9 226.7 H2(g) 130.7 0 C2H6(g) -- -84.7 Bond Bond Energy (kJ/mol) C-C 347 C=C 611 C-H 414 H-H 436 If the value of the standard entropy change, ∆Sº for the reaction is

11. Chemistry

C2H2(g) + 2 H2(g)--> C2H6(g) Substance So (J/mol∙K) ∆Hº!@#\$%^&J/mol) C2H2(g 200.9 226.7 H2(g) 130.7 0 C2H6(g) -- -84.7 Bond Bond Energy (kJ/mol) C-C 347 C=C 611 C-H 414 H-H 436 If the value of the standard entropy change, ∆Sº for the reaction is

12. Chemistry

In the experiment 0.500 g of copper reacted with oxygen to give 0.563 g of copper oxide. What is the empirical formula of the oxide expressed as a chemical formula?

13. math

Find the amount of interest on a loan of \$10,500, at 9% interest, for 124 days using the exact interest method.

14. algebra

Of 256 consumers polled, 78 people like thrillers and 116 like both thriller and comedies. how many only prefer comedies?

15. Math

Centimeter for grid, draw possible rectangles with 16 cm with lengths are whole centimeters po

16. science

When 90 kJ is removed from a 2-kg copper bar its temperature drops from 200 degrees celcius to 85 degrees celcius what is the specific heat of the iron?

17. Math- probabilities

A gumball machine contains 6 red gumballs and 6 white gumballs. Two gumballs are purchased, one after the other, without replacement. Find the probability that at least one gumball is white. Express your answer as a decimal, rounded to the nearest

18. statistics

Tax Preparers Inc. works 250 days per year. The company uses adding machine tape at a rate of eight rolls per day. Usage is believed to be normally distributed with a standard deviation of three rolls during lead time. The cost of ordering the tape is \$10

19. Ap world history

Which of the following would least be a characteristic of the Tang Dynasty in China A)territorial expansion B)isolation from the rest of the world C) re-institution of civil service exams D)A golden age for the silk Road

20. english

1)which of the following sentences is punctuated correctly. a) a carpenter must use certain tools, hammers, saws, chisels, to finish a job. b)a carpenter must use certain tools hammers,saws, chisels-to finish a job. c)a carpenter must use certain tools-

21. Statistics

University Hospital has been concerned with the number of errors found in its billing statements to patients. An audit of 100 bills per week over the past twelve weeks revealed the following number of errors: Week Number of Errors 1 4 2 5 3 6 4 6 5 3 6 2 7

22. Chemistry

C2H2(g) + 2 H2(g)--> C2H6(g) Substance So (J/mol∙K) ∆Hº!@#\$%^&J/mol) C2H2(g 200.9 226.7 H2(g) 130.7 0 C2H6(g) -- -84.7 Bond Bond Energy (kJ/mol) C-C 347 C=C 611 C-H 414 H-H 436 If the value of the standard entropy change, ∆Sº for the reaction is

23. Chemisty

How do I solve what is the mass of a 32.5 mL sample of ethanol if the density of ethanol is .789 g/mL. I know Mass = Density * Volume. So 32.5 mL * .789g/mL = the mass, but I don't know how to solve that.

24. statistics

Suppose that 62 percent of the people who are murdered actually knew the person who committed the murder. Suppose that a detective file in Boston has 62 current unsolved murders. What is the probability that fewer than 33 victims did not know their

25. Chemistry

NaCl is soluble in water, but I2 is not. Explain

26. Chemistry

C2H2(g) + 2 H2(g)--> C2H6(g) Bond Bond Energy (kJ/mol) C-C 347 C=C 611 C-H 414 H-H 436 Calculate the value of the C C (triple bond) energy in C2H2 in kJ/mole.

27. chemistry

what is the pressure of H2 if the hydrogen gas collected occupies 14L at 300K and was produced upon reaction of 4.5 mol of Al?

28. Statistics

Suppose that more than a decade ago high levels of lead in the blood put 81 percent of children at risk. A concerted effort was made to remove lead from the environment. Suppose, according to a survey, only 5 percent of children in the United States are at

29. geometry

T is in the interior of angle"PQR". if angle"PQR"=10X-7, angle"RQT"=5X and angle"PQT"=4x+6 "X" will eaqual to?

30. chemistry

C2H2(g) + 2 H2(g)--> C2H6(g) Bond Bond Energy (kJ/mol) C-C 347 C=C 611 C-H 414 H-H 436 Calculate the value of the C C (triple bond) energy in C2H2 in kJ/mole.

31. Chemistry

How many lone pairs are on the central atom in BCl3

32. Physics

A boy wishes to row across a river in the shortest possible time. He can row at 2m/s in still water and the river is flowing at 1m/s. At what angle should he point th efront of his boat? The answer is 90 degrees but I don't understand how to solve the

33. Math

A Ferris wheel has a diameter of 60 feet. When you start at the bottom of the Ferris wheel, you are 2 feet from the ground.The Ferris wheel completes one rotation in 2 minutes. Create a graph that represents your height relative to the center of the Ferris

34. language arts

What does the phrase as friendly as a nest of yellow jackets mean in paragraph 2?

35. physics

A large air-filled rubber ball is tethered to the bottom of a swimming pool. The tension in the tether is 100N. The mass of the rubber in the ball itself is 2kg while pwater=1000kgm(-3) and pair=1.2 kgm(-3). What is the volume of the ball?

36. math

A clothing company has budgeted \$58,000 for the purchase of 7 sewing machines. The 7 sewing machines are to be chosen from two models, model X and model Y. If a model X sewing machine costs \$8,000 and a model Y sewing machine costs \$9,000, how many model X

37. statistics

Chapter 06, Problem 8 A tire manufacturer has been concerned about the number of defective tires found recently. In order to evaluate the true magnitude of the problem, a production manager selected ten random samples of twenty units each for inspection.

38. Honors Biology - URGENT!!!

Without oxygen, cellular respiration grinds to a standstill, although glycolysis can continue to make some ATP anaerobically for a short time. When oxygen runs out, why does electron transport stop? Why do you thing the Krebs cycle stops?

39. Socials Studies

1. What would be the modus operandi for john locke 2.John Locke's Major influence(Who did he admire and study) 3. John Locke's political views?

40. Math

Use the quadratic formula to find the real solutions of the equation 2x^2-3x=1

41. math

Mr. Mitchell deposited \$40,000 in a bank and earned simple interest at 7% per anum for two years.calculate the amount he will receive at the end of the two year period

42. Chemistry

C2H2(g) + 2 H2(g)--> C2H6(g) Information about the substances involved in the reaction represented above is summarized in the following tables. Substance So (J/mol∙K) ∆Hº!@#\$%^&J/mol) C2H2(g) 200.9 226.7 H2(g) 130.7 0 C2H6(g) - - -84.7 Bond Bond

43. Chemistry

C2H2(g) + 2 H2(g)--> C2H6(g) Information about the substances involved in the reaction represented above is summarized in the following tables. Substance/ So (J/mol∙K) /∆Hº!@#\$%^&J/mol) C2H2(g) / 200.9 / 226.7 H2(g) / 130.7 / 0 C2H6(g)/ ?? / -84.7

44. statistics

A sample of 70 night-school students' ages is obtained in order to estimate the mean age of night-school students. x = 24 years. The population variance is 18.

45. science

A grasshopper floating in water generates waves at a rate of three per second with a wavelength of two centimeters. (a) What is the period of these waves in seconds? (b) What is the wave velocity in m/s?

46. math

A rectangular solid has a base with length 6 cm and width 5 cm. If the volume of the solid is 300 cm3, find the height of the solid. [Hint: The volume of a rectangular solid is given by V = LWH.]

47. statistics

a sample of men's heights was taken. The average height was 68.5 inches, the SD was 1.95 inches. Use the normal curve to estimate the percentage of men with heights between 69 inches and 70 inches.

48. Chemistry

C2H2(g) + 2 H2(g)--> C2H6(g) Information about the substances involved in the reaction represented above is summarized in the following tables. Substance/ So (J/mol∙K) /∆Hº!@#\$%^&J/mol) C2H2(g) / 200.9 / 226.7 H2(g)/ 130.7 / 0 C2H6(g)/ ?? / -84.7 Bond

49. accounting

On December 31, 2013, University Theatres issued \$500,000 face value of bonds. The stated rate is 8%, and interest is paid semiannually on June 30 and December 31. The bonds mature in 15 years. If required, round your answers to the nearest whole dollar.

50. Programming

Write a program that inputs (from the user) the number of hours worked and hourly rate for employees and outputs the total pay. The program should process an arbitrary number of employees; the user will terminate input by entering 0 hours worked and pay

51. catering

when would you use a parchment frill

52. English

Which marks of punctuation would be appropriate to set off the italicized words in the following sentence? One day my dad and his brother stop me if you've heard this story started out on what they thought would be an uneventful drive to work.

53. Economics

Would Wells Fargo's market structure be Monopolistic competition?

54. chemistry

a 52g piece of ice at 0 degree is added to a sample of water at 6 degree all the ice melts and the temp of the water decreases to 0 degrees how many grams of water were in the sample?

55. english parts of speech

choose the sentence that has a subject complement a. the nurse felt my pulse b. i felt much better c. the day ended with many surprises d. we can't leave without seeing her

56. Early Child Ed.

Would you please check these questions and my answers? 1.Research indicates a child's development of prejudice occurs as an interaction of which: A) cognitive development and positive ideas about particular groups in the child's social environment. B)

57. geography

to accommodate the rapid human population growth, the water supply should increase by- a. 5% for 15 years b. 20% for 15 years c. 50% for 10 years d. 10% each year over next 2 decades

58. Chemistry

a.) Caculate the energy of light emitted when an electron moves from n=2 to n=1 in the hydrogen atom. b.) Caculate the energy of light emitted when an electron moves from n=4 to n=2 in the hydrogen atom. c.) How many total different light energies can be

59. math

In a scaled drawing 1/3 of an inch represents 6 feet how many inches represent 54 feet

60. conceptual science

In the absence of air resistance, a ballplayer tosses a ball straight up. (a) By how much does the speed of the ball decrease each second while it is ascending? (b) By how much does its speed increase each second while it is descending? (c) How does the

61. Biostatistics

if we select a birth at random, what is the probability the mother is 19 years of age or younger

62. accounting

Analyze the following scenario: River County is planning several capital acquisitions for the coming year. These include the purchase of two new garbage trucks at \$150,000 each, one new bulldozer at \$240,000, three new riding lawn mowers at \$16,000 each,

63. science

A ball is thrown horizontally from a cliff a 8 m/s. How fast is it moving 2 s later?

64. Preschool

Can you help me to choose the best answer to fill in the blank to this question? Goonight Owl is a good __________ because the children can make the animal sounds while the teacher tells the story. 1. acting story 2. fable 3. story song 4. participation

65. math

Rewrite the set Q by listing its elements. Make sure to use the appropriate set notation. Q={x|x is an integer and -4

66. chemistry

what is the percentage of alcohol in a misture containing 1500 mo of witch hazel (14% alcohlol), 2000 ml of glycerin, and 5000 mls of 50% alcohol?

67. algebar

A rectangle is 5 times as long as it is wide. If the area is 125 square feet, find its perimeter.

68. math

The weights of boxes of Brand Z cereal were found to be normally distrubted with a mean of 16.5 ounces and a standard deviation of 0.4 ounces. a. what percentage of the boxes will weigh more than 16 ounces? b. what percentage of the boxes will weigh

69. Algebra 2

I am trying to factor a 4th degree polynomial that does not have any rational roots. I need to somehow get it factored into two quadratics. Anyone know of a method to use. 3x^4 - 8x^3 - 5x^2 + 16x - 5 Two of the irrational roots are 1.135.. and 0.382.. but

70. physics

there are 1000 bricks and when they are stacked neatly they measure 2m by 1m by 1m. What is the volume of the stack? what is the volume of one brick? what is the mass of one brick?

Your team has been hired as consultants by a company and is meeting with the executive boardPrepare a 15- to 20-slide PowerPoint® presentation with detailed speaker’s notes that describes the ISO 14001 certification process. Address the following

72. Computer programming

Sorting is a common operation used in programming. Although languages such as Visual Basic 2008 offer built-in methods for sorting, other languages such as C do not support such a method. In order to be a programmer you should be able to implement such

73. Sociology

There are three levels or three areas of underdevelopment. identify those, with examples from various countries. How equitable economic distribution help or hurt development? 2. What is Human Development Index? What is GDP? Dow do these two factors relate

74. Ap world history

I population increase and East Asia and South East Asia during this timeframe was due in large part to.. A) The lack of wars B)The growing respect for a woman C) The spread of Buddhism,hey religions that encourages procreation D) The development of a

75. Socials

I need to label a map of Canada during it's fur trading and explorer times. I cannot seem to map both the Columbia River and the Thompson river as on google images they seem to be located at the same spot... could someone explain and give a link to an

76. college algebar

logb x= logb(x+2)-logb8

77. Preschool/Storytelling

Would you please look over my answers to these questions and see if you agree that I have chosen the best answer. If my answers are wrong-please let me know. 1. When storytelling,memorization is: A. a good idea for phrases or sections that are repeated in

Algebra 2 There is a graphs of the sequence f(n)=2n-3 and a graph of the function f(x)=2x-3 What difference exist between the two graphs? What accounts for the differences between the graphs in terms of domain and range? Help please I don't understand

79. english

The team ..... is wearing the red jerseys the one I came to see. which of the following .pronouns correctly completes the sentences a)who b)whom c)that d)which

80. Math

-5,-3,-1,1,3,5 If a and b are different integers chosen from the list above, how many possible values are there of the product ab? I know the answer is 15 but do I always use factorial method whenever I meet questions that ask for how many possibilitites?

81. DISCRETE MATH

How many different strings can be made from the letters in STATISTICS, using all the letters

82. Physics

A 55 kg box is pulled with constant speed across the floor with a rope that is at an angle of 40 degrees above the horizontal. If the tension in the rope is 125n what is the coefficient of friction between the box and the floor?

83. suno

a 250 g yoyo is swung on the end of a 50cm string at a constant speed of 4/ms. the centrpetal force acting on the yoyo

84. algebra

0.15x+55>0.10x+80 how do i work this out?

85. Honors Biology - URGENT!!!

ATP is used to power the movement of your muscles as you turn the pages of a book. Where did the energy in the ATP come from? Trace the energy in the ATP molecule back to the sun.

86. inequalities

A home-based company produces both hand-knitted scarves and sweaters. please help please The scarves take 2 hours of labor to produce, and the sweaters take 14 hours. The labor available is limited to 40 hours per week, and the total production capacity is

87. Early Child Ed.

Can you please check these to make sure my answers are correct? 1. An educator who uses stereotype-free learning materials qnd activities that allow both boys and girls to participate in the same physical play is promoting: 1. insensitivity to cultural

88. Physics

What wil be the new area of 400cm square of a solid,if its temperature is raised by 10k.(L.E=19times 10raised to power 2

89. Algebra

At Phillips college 40% of the students are male. If there are 1200 male students, then how many total students are there?

90. math

When it is assembled, a flute is 28 inches long. The middle piece m is 5 inches less than twice as long as the first piece f. The last piece l is two-thirds as long as the first piece. Find the length of each piece of the flute

91. Math

Write the ratio 2.7kg to 1.8kg as a fraction to the simplest form, with whole numbers in the numerator and denominator.

92. Chemistry.

Caculate the wavelength of light emitted when each of the following transitions occur in the hydrogen atom. A.) n=3->n=2 B.) n=4->n=3 C.) n=2->n=1 How do you do this. Could you please just show me step by step for atleaset one. Please!

93. Physics - Heat Transfer

I am trying to calculate heat transfer between two objects. The units are as follows: m1: 100 g t1: 10 degrees C spec heat 1: 1.00 cal/g degree C m2: 200 g t2: 90 degrees C spec heat 2: 0.2 cal/gm degree C I set Q1 = Q2 m1 x spec heat 1 x delta T1 = m2 x

94. Physics (maybe it's just math)

A sphere of copper is subjected to 89.7 MPa of pressure. The bulk modulus is 130 GPa. a) By what fraction does the volume of the sphere change? b) By what fraction does the radius of the sphere change? for a) I have dV/V = 0.00069 - this is correct. for b)

95. math

Given the following information, determine the sample size needed if the standard time estimate is to be within 5 percent of the true mean 99 percent of the time. Work Element Standard Deviation (minutes) Mean Observed Time (minutes) 1 0.20 1.10 2 0.10

96. Physics

A sidewalk is to be constructed around a swimming pool that measures (11.00+/-0.12) m by (17.40+/-0.12) m. If the sidewalk is to measure (1.22+/-0.02) m wide by (9.60+/-0.15) cm thick, what volume of concrete is needed?

97. Honors Biology - URGENT!!!

After a biochemical analysis of the victim's tissues, brilliant biologist/criminal investigator J. C. Mickleberry announced his findings: "Contrary to the conclusions of the police, the victim did not suffocate. The electron carriers in his mitochondria

98. Medical Terminology

A 15-year old female patient has experienced daily nausea for the past two months. The patient states that she feels like "I've eaten something that has upset my stomach.: She denies vomiting and weight loss. The patient has noticed a weight gain of 10 lb

99. social studies

how did monopolies hinder the free enterprise system.