cathy

Most popular questions and responses by cathy
1. Physics

You are given vectors A = 5.0i - 6.5j & B = -3.5i + 7.0j. A third vector C lies on the xy-plane. Vector C is perpendicular to vector A, & the scalar product of C with B is 15.0. From this information, find the components of vector C.

2. Math

At Laurita's bakery 3/5 of the baked goods are pies and the rest are cakes. 1/3 of the pies are coconut. 1/6 of the cakes are angel-food. What fraction of all of the baked goods at Laurita's Bakery are coconut? What fraction of all the baked goods at

3. math

in a geometric series t1=23,t3=92 and the sum of all of the terms of the series is 62 813. how many terms are in the series?

4. Algebra

Two children balance on opposite ends of a seesaw. One child weighs 45 pounds and the other weighs 38 pounds. The distance between them is 10 feet. What is the distance of each child from the fulcrum (the center balance point of the seesaw)? (HINT: The

5. STAT

A student takes a ten-question true-false quiz, but did not study and randomly guesses each answer. Find the probability that the student passes the quiz with a grade of at least 70% of the questions correct

6. physical science

A horse galloped a mile in 2 min 35s. What was its average speed in km/h?

7. Language arts

Compare and contrast your independent reading selection with one or two other selections you have read in this unit. SUpport your response with at least 2 pieces of evidence from your Independant Reading selection. Be sure to give the title an author of

8. Math

Diana has 520 yards of fencing to enclose a rectangular area. Find the dimensions of the rectangle that maximize the enclosed area. What is the maximum area?

9. History

Which correctly defines divine right? A)the belief that people have the right to challenge religious authority B)the idea that religious leaders should guide society and the state C)the belief that all people are born with God-given rights D)the idea that

10. Math

One shuttle service charges \$10 for pickup and \$0.10 per mile. The other shuttle service has no pickup fee but charges \$0.35 per mile. Find the number of miles for which the cost of the shuttle service is the same. Please help me and show your work thanks.

11. History

Which defines caste system? A)Muslim system of separating men and women in society B)European feudal practice of granting knighthood to a warrior C)Hindu practice of determining social status by birth D) Buddhist belief of spiritual equality based on

12. History

Which accurately defines heliocentric theory? concept of the solar system with the sun at the center and planets orbiting it Is this the correct answer?

13. solid mensuration

Determine the area of the segment of a circle if the length of the chord is 15 inches & located 5 inches from the center of the circle.

14. Chemistry

Will someone show me the formula or help me through working this question? Thanks! A 2.85g lead weight, initially at 10.3 deg C, is submerged in 7.55g of water at 52.3 deg C in an insulated container. what is the final temperature of both substances at

15. math

Money is invested in a savings account at 3.4% simple interest. After 1 year, there is \$1695.76 in the account. How much was originally invested?

16. chemistry

the reaction of aluminum metal (Al) with oxygen (O2) forms Al2O3. What is a balanced equation for this redox reaction. What are two half reactions to show how many electrons are gained or lost by each species?

Write the expression 6a in words Write the expression 3x+7 in words

18. solid mensuration

Two perpendicular chords divide a circle with a radius of 13 cm into 4 parts. If the perpendicular distances of both chords are 5 cm each from the center of the circle, find the area of the smallest part. Please include solution. Thanks.

19. Biology*STUCK*

The fluid mosaic model describes the structure of the plasma membrane. Embedded within the plasma membrane are proteins and carbohydrates that contribute to the term mosaic. Glycolipids and glycoproteins are examples of carbohydrates on the surface of red

20. math

Take the following out of fraction form tan^2x/cscx+1

21. computer science

write a program that prompts the user to input three numbers. The program should then output the numbers in nondescending order.

22. Math

Lucy used 3 3/4cups of sugar for her lemonade stand she divided the sugar in equal amounts into 6 pitcher how much sugar went into each pitcher

23. History

In which type of government is power held by the people through elected representatives? A)republic B)theocracy C)feudalism D)monarchy A?

24. chemistry

Calculate the mass in grams of 2.50 mol iron(II) hydroxide. A. 29.5 g Fe(OH)2 B. 184.5 g Fe(OH)2 C. 225 g Fe(OH)2 D. 3.38 x 10-2 g Fe(OH)2 C

25. Chemistry

What is the compound name for Sb2(CrO4)5? This is the only question I am having trouble with.

26. math

an electronics store receives a shipment of 40 graphing calculators including 3 that are defective. Four of the calculators are sleceted to be sent to a local high school. How many selections can be made using the original shipment

27. Math

The ratio of oil to vinegar in a certain salad dressing is 8:5. How much oil must be blended with 7 liters of vinegar for that recipe?

28. Engineering Economy

Maintenance cost of an equipment is P20,000 for 2 years, P40,000 at the end of 4 years, and P80,000 at the end of 8 years. Compute the semi-annual amount that will be set aside for this equipment. Money worth 10% compounded annually. My answer is

29. solid mensuration

Find the area of a portion of a semicircle of radius 15 m that is outside the area of an inscribed square if the base of the square lies on the diameter of the semicircle. Please include solution. Thanks.

30. CHEMISTRY

Methanol (CH4O0, which is used as a fuel in high performance racing cars, burns in the presence of )2 to form CO2 and H2O. The molar masses for all substances are given under the balanced equation. 2 Ch4O9l) + 3 O2(g)-->2 CO2(g)+ 4H2O9g) 32.0g/mol 32.g/mol

31. algebra

A piece of pottery is removed from a kiln and allowed to cool in a controlled environment. The temperature (in degrees Fahrenheit) of the pottery after it is removed from the kiln for various times (in minutes) is shown in the following table. Time, min

32. solid mensuration

Find the area of a cyclic quadrilateral whose 2 sides measure 4 & 5 units, & whose diagonal coincides with a diameter of the circle. Suppose the radius of the circumscribing circle is 2 sq.root of 3 units. Please include solution. Thanks.

33. algebra

The slope of a vertical line is _________? The equation of the vertical line passing through (4, 5) is ________?

34. CHEMISTRY

Methanol(CH4O),used in racing cars,burns O2 to form CO2and H2O. 2CH4O(l) + 3O2(g)-->2Co2(g) +4H2O(g) 32.0g/mol 32.g/mol 44.g/mol 18.g/mol What is the theoretical yield of CO2 from 48 g of methanol? What is the percent yield of CO2 if 48.0g og CO2 are

35. Biology

Discuss two lifestyle factors (one for bone and one for muscle) that affect the growth, development, size and/or healing (positively or negatively of the tissue. Also state whether the factor can lead to a disease or disorder of the tissue.

36. physical science

. A swimming pool is exactly 20m long, 7m wide, and 2m deep. What is its volume in cubic feet to 3 significant figures?

37. math

Renting a Car A rental car costs \$25 plus \$0.25 per mile. (a) Write an equation that gives the cost C of driving the car x miles. (b)When will the rental be \$100 dollars? Complete numerically with a table of values.

38. Geography - URGENT!

It has been said that Eastern Europe is a political region more than a physical region. Would you agree or disagree with this statement? You must provide a solid argument for your position. My answer: Eastern Europe has only been a political region since

39. Chemistry

If the equilibrium concentrations are [PCl5] = 1.0M, [Cl2] = 0.10M, what is the equilibrium constant value? PCl5(g) PCl3(g) + Cl2(g) Would you mind showing the calculations Please. I've been working on this problem over an hour now. Not certain if I am

40. chemistry

how many moles of solute are contained in each solution? 250 mL of a 0.55 M NaNO3 solution? 145 mL of a 4.0 M HNO3 solution? 6.5 L of a 2.5 M HCl solution?

41. engineering economy

Maintenance cost of an equipment is P20,000 for 2 years, P40,000 at the end of 4 years, and P80,000 at the end of 8 years. Compute the semi-annual amount that will be set aside for this equipment. Money worth 10% compounded annually.

42. Economics

Could you please check these thanks. Directions: Supply can decrease and increase depending upon several factors. Also you must put if that factor increase/decreases amount of supply, if the supply curves to the left/right, and if the cost to produce is

43. solid mensuration

A circle has an area equal to 25 pi sq.cm. Its diameter AB coincides with one of the sides of triangle ACB in which the vertex C lies on the circle. If the triangle has an area equal to 11 sq.cm, find its perimeter. Please include solution. Thanks.

If a transparent material has a refractive of 2.0; a) calculate the critical angle b) if the refractive index were less than 2,0, would the critical angle be greater or less than before? Im super confused at this :(

45. Writing

What if ten years ago, you started working as a clerk for DMD Medical Supplies? Six months ago, Liz Jakowski,the human resources director, promoted you to office manage. You manage two employees: Jack Snyder and Ruth Disselkoen. My office provides

46. PHL458

Don't really understand what the teacher want. Can you help me get a better understanding. Evaluating and Refining Resolutions Presentation (Preparation) Search for societal issues and pick one issue you would like to resolve. Obtain faculty approval of

Romeo and Juliet; Act 1 Scene 5 Chorus Now old desire doth in his death-bed lie, and young affection gapes to be his heir; That fair for which love groan'd for and would die, With tender Juliet match'd is now not fair. Now romeo is belov'd, and loves

48. trig

In a regular octagon, AB is a diagonal and CD joins the midpoints of two opposite sides. The side length of the octagon is 4 cm. To the nearest tenth of a cm. find a)AB and b)CD. I'm stumped.

49. math

a boy travels 15 km due north,then goes 9 km due east,then 3km due south.how far is he from his starting point find the distance the boat would have traveled if it had gone directly from point p to point t

50. trigonometry

a flagpole 25 feet high stands on the top of a tower, which is 105 feet high. at what distance from the base of the tower will the flagpole subtend an angle of 3 degrees, 20 minutes?

51. grand canyon

Draw a scatterplot indicating a strong negative relationship between the variables of income and mental illness. Be sure to label the axes correctly

52. Math

Ok so I need to write a equation for this jasmine paid \$25 for 2 binders and 1 pack of pens. The pens cost \$5. What equation could I write to find out the price per binder? Could it be 25-5=x

53. math

a boat starts at point a p travels 15 miles due north to point r then turns due east and travels 8 more miles to the dock at point t find the distance the boat would have traveled if it had gone directly from point p to point t

54. Chemistry

A buffer is prepared by mixng 150.0 mL of 0.500 M ammonia, 250.0 mL of 0.200 M ammonium chloride and 600.0 mL of water. To this solution is added 50.0 mL of 0400 M hydrochloric acid. What is the final pH?

55. Chemistry

Draw the best Lewis structure for NCCH2C(O)CH2CHO, a neutral molecule. Show all atoms, bonds, lone pairs, and formal charges.

56. Physics

Problem: A hunter shoots an arrow at a deer directly away from him. When the arrow leaves the bow, the deer is at a distance of 38 m. When the arrow strikes, the deer is at a distance of 51.00 m. The speed of the arrow is 65.00 m/s. What must have been the

57. Mathy

In printing an article of 48,000 words, a printer decides to use two sizes of type. Using the larger type, a printed page contains 1,800 words. Using a smaller type, a page contains 2,400 words. The article is allotted 21 full pages in a magazine. How many

58. Biology

In peas, tall plants (T) are dominant to short (t), purple (P) is dominant to white flower color (p), and round seeds (R) are dominant to wrinkled seeds (r). What is the phenotype of a plant with genotype TtppRr?

59. Math

Use the points(0,6200) &(25,10500) to write an equation for the number of housing units needed. Then use the points(0,6500) and (25,6100) to write an equation for the number of affordable units available.

60. accounting

Jan Nab is the sole owner of Deer Park, a public camping ground near the Lake Mead National Recreation Area. Jan has compiled the following financial information as of December 31, 2010. Revenues during 2010—camping fees \$140,000 Market value of

61. english

The following sentence is missing punctuation: “The crowd upset by the delay began to chant loudly for the band to appear.” Explain where the error has occurred in this sentence and how it can be fixed. 6. Identify which one of the following sentences

62. Science

The warmest temperature occurs at _______ and why does the warmest daily temperature occur in mid-to-late afternoon rather than at the time if the highest sun angle? The coolest temperature of the day occurs at sunrise. Why?

63. Science Environmental

Using the 4 principles of sustainability Reliance on Solar Energy, Nutrient recycling, Biodiversity, and Population control. How would you classigy the following? • Recycling soda cans • Using a rake instead of a leaf blower • Choosing to have no

64. college algebra

There were 39,000 desktop publishing jobs in the United States in 2000. It has been projected that there will be 64,000 desktop publishing jobs in 2010. (a) Using the BLS data, find the number of desktop publishing jobs as a linear function of the year.

65. CHEMISTRY

how many grams are contained in 0.50 mol of each compound? HCl Na2SO4 C2H2 and Al(OH)3?

66. Science

The percent of atmosphere above and below 16.8 km is?

67. Finance

Assume personal income was \$28 million last year. Personal outlays were \$20 million and personal current taxes were \$5 million. a. What was the amount of disposable personal income last year? Disposable personal income (DPI) = personal income – personal

68. Biology*STUCK*

The fluid mosaic model describes the structure of the plasma membrane. Embedded within the plasma membrane are proteins and carbohydrates that contribute to the term mosaic. Glycolipids and glycoproteins are examples of carbohydrates on the surface of red

69. physics

Rearrange the kinetic energy equation to solve for: m And v

70. algebra

A rental company purchases a truck for \$14,500. The truck requires an average cost of \$6.75 per day in maintenance. (a) Find a linear function that expresses the total cost C of owning the truck after t days. C(t) = (b) The truck rents for \$55.00 a day.

71. Special Education Setting Teachers Aide

children with a language or speech disorde are A)sometimes suffering from an aphasia.(my answer) B)always learing challenged. C)able to receive special help only after the third grade. D)unable to use communication boards. can someone please check if this

72. solid mensuration

Find the area of a segment of a circle whose diameter is 16 cm & the central angle measures 80 degrees. Please include solution. Thanks.

73. chemistry

How many moles are in 24.0 g KCl? A. 3.22 mol B. .32 mol C. 0.322 mol D. 32.2 mol C

74. chemistry

A buffer solution was prepared by mixing 442 mL of 0.181 M NaOCl and 139 mL of 0.421 M HOCl. Calculate the pH of the solution given that Ka (HOCl) is 3.2 x 10-8.

75. Psychology

Discuss the prevalence and effects of Foetal Alcohol Syndrome (FAS) in South Africa with reference to either Erikson’s theory of socio-emotional development or Piaget’s theory of cognitive development. Identify at least one risk to normal

76. math

How would you solve this problem?? A piggy bank contains only nickels and dimes. In all there are 42 coins with a total value of \$3.85. How many nickels are in the piggy bank??

77. Math

solve 3(2x-2)=18 select the correct choice below& if necessary fill in the answer box to complete your choice. a. the solution is x= simplify answer. b. the solution is all real numbers. c. there is no solution.

78. Math

What is the greatest common divisor of 54 and 144?

79. Env Science

Using the 4 principles of sustainability Reliance on Solar Energy, Nutrient recycling, Biodiversity, and Population control. How would you classigy the following? Recycling soda cans :Using a rake instead of a leaf blower :Choosing to have no more than one

80. ENGLISH

What do I capitalize? Which is correct in this sentence: California Gold Rush or California gold rush? Please support with the grammatical rule. The decline of whaling in America began with the California gold rush in 1849.

81. Chemistry

What mass of carbon dioxide is produced when 7.5g of methane is completely burnt in air.

82. Education/College level

National Education Technology Standards: NETS for Teachers. 1. Facilitate and Inspire Learning and Creativity. b. engage students in exploring real-world issues and solving authentic problems using digital tools and resources. What skills and competencies

83. Math- Data Management

How would you solve this problem. The mean of 10 numbers is 8. If an 11th number is now included, the mean becomes 9. What is the value of the 11th number? Make an algebraic solution.

84. Psychology

Treena is a personable student in Mr. Jordan’s math class. Mr. Jordan can see that Treena is popular with her peers. He regularly sees her conversing animatedly with her friends in the cafeteria and before and after school. She does well in class also.

85. Early Childhood

Describe nine elements of daily structure recommended for any early childhood program.

86. chemistry

Find the mass in grams of 1.01 mol TiO2 A. 0.806 g TiO2 B. 80.67 g TiO2 C. 8.06 g TiO2 D. 806.7 g TiO2 B

87. chemistry

Can you help me with the following: Calculate the pH that results when 25 mL of .1M HCL is titrated with .1M NaOH solution run in from a buret at each of the stages of volume of .1 M NaOH add in 5.0 mL incrememnts beginning with 0 mL of NaOH

88. anatomy and psysiology

what area of the spinal cord is destroyed when a person gets polio?

89. physics

a stone of mass o.5 kg is dropped from a height of 5om.what is the kinetic energy of the stone just before it strikes the ground

90. Marketing

What is the decision facing American Express and what are the alternatives? (promotional strategy and integrated communication)

91. Chemistry

I need help with getting started: 1.The crystal structure of an ionic compound consists of alternating cations and anions lying next to each other in three dimensions. If the cation radius is 55.1% of the anion radius and the distance between the cation

92. algebra

5z-20/33 /z-4/121

93. math

cot u - cot 2u = cosec 2u

94. College/education class

What are the most effective and ineffective uses of objective assessments for instructors and learners? What is your view on the relative advantages and disadvantages of using objective tests? How might you incorporate objective assessments in your

95. Geometry, Cubes

The surface of a cube is painted red and blue, 3 sides of each. The cube is cut into 27 equal sized smaller cubes. Find both answers to the question, "How many cubes have at least 2 sides painted blue?" and "How many cubes have at least 1 side painted

96. Geometry

The surface of a cube is painted red and blue, 3 sides of each. The cube is cut into 27 equal sized smaller cubes. Find both answers to the question, "How many cubes have at least 2 sides painted blue?" and "How many cubes have at least 1 side painted

97. math

Please solve the system with the elimination method. Explain each step as it is performed. 5y = x 2x - 3y = 7 Would the elimination method have been your first choice to solve this problem?

98. 6G Math (pls check my answer)

Solve the inequality. y+3

99. college algebra

A line has the equation y = 5x + 4.(a) This line has slope of ___________? (b) Any line parallel to this line has slope _________? (c) Any line perpendicular to this line has slope _______?