# Barb

Popular questions and responses by Barb

2. ## Math

Write a list of steps that are needed to find the measure of ∠B. A line segment ACD is shown with triangle ABC drawn so that AC is the base of the triangle. Angle BAC is labeled with 72 degree sign, and angle BCD is labeled with 113 degree sign.

3. ## Algebra

You plan to build four identical rectangular sheep pens in a row. Each adjacent pair of pens share a fence between them. You have a total of 368 feet of fence to use. Find the dimension of each pen such that you can enclose the maximum area. 5w+8L=368

4. ## algebra

A cup of coffee is heated to 180°F and placed in a room that maintains a temperature of 65°F. The temperature of the coffee after t minutes is given by T(t) = 65 + 115e^−0.042t.(a) Find the temperature, to the nearest degree, of the coffee 10 minutes

5. ## Math

A merchant visited 3 fairs. At the first, he doubled his money and spent \$30; at the second he tripled his money and spent \$54; at the third, he quadrupled his money and spent \$72, and then had \$48 left. How much money had he at the start?

6. ## scientist

A techer pushed a 98 newton desk across a floor for a distance of 5 meters she exerted a horizontal force of 20 newtons. how much work was done?

7. ## Math

Show that z/pq = 1/pr + 1/qr, where r = (p + q)/z Finding decmpositions of a fraction into 2 units as indicated on a paprus written in Greek.

A pizza box top with a square base is to be made from a rectangular sheet of cardboard by cutting six 1-inch squares from the corners and the middle sections and folding up the sides. If the area of the base is to 144 in^2, what piece of cardboard should

9. ## Math

Two boats leave a dock at the same time. One heads due east at 20 mph, and one heads due south at 15 mph. How far apart are the two boats after 45 minutes have elapsed?

10. ## math

graph the equation by plotting the points: 35-5y=0 i know how to put the solutions on the graph. i am stuck on this equation. i think x=0 but i can not figure for y. please help me and show me the steps to solve this.

11. ## calc

The half-life of polonium is 139 days, but your sample will not be useful to you after 95 % of the radioactive nuclei present on the day the sample arrives has disintegrated. For about how many days after the sample arrives will you be able to use the

12. ## Algebra

Triangles ABC and DEF are similar. Find the area of triangle ABC. Round your answer to the nearest tenth. Triangle ABC has a base of 12m. Triangle DEF has a base of 18m and height of 12m

13. ## Science

If a black coat that is coat dominant over a red coat but is heterozygousfor coat color and breeds with a red cow, what percentage of their offsprings would be black coat

14. ## Statistics

The scores on a math test are normally distributed. if the mean is 72 and the standard deviation is six, what is the range of 98% of the scores?

15. ## Chemistry

A scuba diver 60 ft below the ocean surface inhales 55.0 mL of compressed air from a scuba tank at an initial pressure of 2.60 atm and temperature of 8 ∘C. What is the final pressure of air, in atmo-spheres, in the lungs when the gas expands to 155.0 mL

16. ## legal writing 2

i am suppose to write 2 legal memorandum sally bright v. john bright and john bright v. sally bright child custody case. mother wants to take minor child out of the country.

17. ## science

a 49 newton rockis lifted 2meters in 5 seconds How much work is done? b what power is used?

18. ## algebra

Flying with the wind, a plane traveled 570 miles in 3 hours. Flying against the wind, the plane traveled the same distance in 5 hours. Find the rate of the plane in calm air and the rate of the wind. Rate of plane ______mph Rate of wind ________mph

19. ## Math

One angle of a triangle measures 105degrees and another angle measures 32degrees what is the measurement of the third angle

20. ## legal writing 2

legal writing project 2 sally bright v. john bright

Prove that no isosceles right triangle exists whose sides are integers.

22. ## algebra

The height in feet of a projectile with an initial velocity of 32 feet per second and an initial height of 48 feet is a function of time in seconds given by h(t) = −16t2 + 32t + 48. (a) Find the maximum height of the projectile. ft (b) Find the time t

23. ## science

a teacher pushed a 98 newton desk acrosss a floor for a distance of 5 meters she exerted a horizontal force of 20 newton How much work was done?

24. ## Algebra

Find the payment necessary to amortize a 4% loan of \$900.00 compounded quarterly , with 11 quarterly payments?

25. ## algebra

The function A(t) = 200e^-0.014t gives the amount of medication, in milligrams, in a patient's bloodstream t minutes after the medication has been injected into the patient's bloodstream. (a) Find the amount of medication, to the nearest milligram, in the

a student wo weighs 500 newtons climbed the stairs from the first floor to the third floor 15 meters above in 20 seconds A.how much work did she do? B.what was her power

27. ## science

a womans lifts a 300 newton child a distance of 1.5 meters and carries her forward for 6.5meters. how much work does the woman do in lifting the child? b.how much work does the child do?

28. ## algebra

A medical researcher wanted to determine the effect of pH (a measure of alkalinity or acidity, with pure water having a pH of 7) on the growth of a bacteria culture. The table below gives the measurements of different cultures, in thousands of bacteria,

29. ## English

I have an sentence. Beth lost her glasses at the library. I have to replace HER GLASSES with a pronoun Thank you for using the Jiskha Homework Help Forum. You need a direct object pronoun = them.

30. ## math

Determine the intersection X ∩ Y. Express the in interval notation. X = {x } and Y = {x

31. ## sci/275-environmental

What are the pros and cons of using Malathion pesticide????

32. ## algebra

The fuel efficiency for a certain midsize car is given by E(v)= -0.016v^2+1.408v+3.8, where E(v)is the fuel efficiency in miles per gallon for a car traveling v miles per hour. What speed will yield the maximum fuel efficiency? _______mph. What is the

33. ## algebra

Solve the inequality graph solution 8| x+3/4|-1/2, -5/32

34. ## finance

The Landis Corporation had 2008 sales of \$100 million. The balance sheet items that vary directly with sales and the profit margin are as follows: Cash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5% Accounts receivable. . . . . . . .

35. ## Math

One number is 10 less than twice a second number. Find a pair of such numbers so that their product is as small as possible. These two numbers are_ and _. (Use a comma to separate your numbers.) The smallest possible product is_. The number are NOT 5,15 or

36. ## Liature

Identify Parts of Speech in A city must be planned Carefully, or people will not want to live in it.

37. ## chemistry

In the experiment you have added 50.0 mL of Ni(H2O)6 2+ to the calorimeter. To this you add 5.0 mL of ethlylenediamine and measure the change in temperature of the solution as the reaction proceeds. The temperature increases by 3.4 oC. Calculate the

38. ## child care management

One reason early childhood education centers have become increasingly important providers of health education is that A.schools are more sanitary than 70percent of home environments. B. younger, healthier teachers and classroom aides have emereged. c.

39. ## math

the quotient of n and 5 is 4 times n find equation

40. ## math

the water in leroy's and jerod's fish tank has evaporated so it was about 5/8 inch below the leverit should be.they added water and the water level went up about 3/4 inch.did the water level end up above or below where it should be? answer

49 is 77% of what number?

42. ## chem

make an aqueous solution of 0.176 M copper(II) chloride for an experiment in lab, using a 300 mL volumetric flask. How much solid copper(II) chloride should you add

43. ## Math

What is the word form for 1.555?

The surface area of a right circular cylinder is 1200 cm^2 . If the height of the cylinder is twice its diameter, find the dimensionsof the cylinder. I know th formula for SA is SA = 2pir^2 + 2pirh I know h = 2d. I know r = 1/2 d What is h in relations to

45. ## Math

What is the reciprocal of .26

46. ## chenistry

how many calories are required to melt a 135.0g sample of ice at 0.0 c

47. ## algebra

Lead shielding is used to contain radiation. The percentage of a certain radiation that can penetrate x millimeters of lead shielding is given by I(x) = 100e^−1.5x. What percentage of radiation, to the nearest tenth of a percent, will penetrate a lead

48. ## Math

A pizza box with a square base is to be made rom a rectangular sheet of cardborad by cutting six 1-inch squares from the corners and the middle sections and folding up the sides. If area of the base is to be 144 in^2, what piece of cardboard should be

49. ## algebra

The number of bass in a lake is given by P(t) = 2800/1+6e^-0.05t where t is the number of months that have passed since the lake was stocked with bass. (a) How many bass were in the lake immediately after it was stocked? ? bass (b) How many bass were in

A chunk of oak firewood has a mass of about 2.85 kg and has a volume of 4100 cm^3. Determine the density of oak in g/cm^3.

51. ## accounting

what is the total liabilites and the owners equity in the balance sheet you prepared in exam figure 4? a. \$,5,906.54?

52. ## Math

30 flasks--10 full, 10 half-empty, and 10 entirely empty--are to be divided among 3 sons so that flasks and contents should be shared equally. How may this be done?

A traverse with five sides has interior angles with the following measures: 121deg 45 min: 118 deg 25 min; 87 deg 32 min; 98deg 34min, and 113 deg 54 min. Does the traverse close? If not, determne the error in the traverse.

54. ## Precalc

Find the vertex and focus of the parabola. (x^2)-(24y) = 0

55. ## math

can i get step by step for this equation? 3x + 2y =24 what is the y intercept and what is the x intercept? I need the ordered pairs

56. ## math

how do you know when an equation has infinate many solutions and how do you know if an equation has no solutions? The second part of this question I get. If you work an equation and come up with 5=3 this is not a solution. Is that part right? I guess I do

57. ## Math

A carpenter agrees to work under the conditions that he is to be paid \$5.50 every day he works, but must pay \$6.60 every day he does not work. At the end of 30 days he finds he has paid out as much as he has received. How may days did he work?

58. ## english

Is the word program a v/cv or double constanant?

59. ## Math

Prove: If the hypotenuse and an acute angle of one triangle are congruent respectively to the hypotenuse and an acute angle of another right triangle, then the two triangles are congruent.

While rummaging, Bernard found a figurine that he believed to be made out of silver. To test his guess, he looked up the density of silver and found it to be 10.5g/cm^3. The figure had a mass of 149 g. To determine its volume, he dropped it into a

61. ## science

• Explain the flow of energy through the ecosystem using specific plant and animal examples. Correctly use the following terms in your example and explanation; primary producer, primary consumer, secondary consumer, tertiary consumer, trophic level. •

62. ## Chemistry

How many moles of Carbon dioxide are produced from the decompostion of 1.45 grams of Aluminum Carbonate?

63. ## trig

angles of elevation to an airplane are measured from the top and the base of a building that is 40 m tall. The angle from the top of the building is 31°, and the angle from the base of the building is 40°. Find the altitude of the airplane. (Round your

64. ## Chemistry

Acetic acid has a pK of 4.8. How many mL of 0.1M acetic acid and 0.1M of sodium acetate are required to prepare 1 liter of 0.1M buffer solution having a pH of 5.8?

65. ## math

please solve: 8y - 12 < 7y - 7 { y y < ? there is supposed to be a straight line between the y and y

66. ## chemistry

How many grams of potassium sulfide are produced from the reaction of 1.23 moles of potassium with sulfur?

67. ## algebra

The monthly income I, in dollars, from a new product is given by I(t) = 81000 − 45000e^-0.005t where t is the time, in months, since the product was first put on the market. (Round your answers to the nearest dollar amount.) (a) What was the monthly

68. ## calculus

find an antiderivative F(x) of f(x)=11x-sqrt(x)

69. ## Social Studies

How did the French and Indian War change the British relationship with its American Colonies?

70. ## Engish

I have a book on finding what you need for critical thinking as for as questions and answers please if I can help let me know. Critical thinking happens to be one of my courses.

71. ## Earth Science

What commonly used metal is extracted from hematite? There are a number or iron ores. Hematite is one of them.

72. ## chemistry

what happens to water at 100 degrees celsius as pressure is increased fro 0.8 atm to 1.2 atm?

73. ## geometry

if a scale factor of four is used, the points in the image will be eight times as far from the origin as at he pre-image points true or false

74. ## Math

The area of a rectangle is 12 and the width is 3/4 the length. What are the dimensions?

75. ## PreCalc

6.Given -2i is a root, determine all other roots of x^4-10x^3+42x^2-88x+80. A. x= +/- 4, 2i B.x= -2, +/- 4i C.x= -4, +/- 2 D.x= -4, 2i E.x= +/- 4, 2 Please help, I do not understand where to begin.

76. ## calc

2- The earth’s atmospheric pressure p is often modeled by assuming that the rate dpdhat Which p changes with the altitude above sea level is proportional to hp. Suppose that the pressure at sea level is 1013 millibars (about 14.7 pounds per square inch)

77. ## Math

One number is 10 less than twice a second number.Find a pair of such numbers so that their product is as small as possible. x-10 2x 2x(x-10) 2x^2-20x -(-20/2(2))=5 2(5)^2-20(5) 50-100=-50 I think I am really lost

A pizza box with a square base is to be made from a rectangular sheet of cardboard by cutting six 1-inch squares from the corners and the middle sections folding up the sides. If the area of the base is to be 144 in^2, what size piece of cardboard should

I only have 1 hour to get this question answered. Thank you in advance. I need a quadratic equation in the variable x given the solutions: -7 sqrt 7, and 7 sqrt 7 This needs to be in the standard form of ax^2+bx+c=0. Can someone please help me with

80. ## math

write an equation of the line containing the given point and parallel to the given line; use y=mx+b form; (5,8) x+4y=7 i keep getting this wrong. Can someone show me how to work this? Thank you so much

81. ## MAT115

Identify the base in the following application: The sales tax rate is 8%. If you pay a tax of \$2.50 on an item, what is the selling price. I don't know what the base is or how to solve the problem.

82. ## science

4. Assignment: Photosynthesis and Cellular Respiration Powerpoint Energy acquisition is essential for all life. Whether the organism is classified as plant or animal, single-celled or multicellular, the exchange of energy and the formation of products

83. ## algebra

The function p(d)=1+d/33, gives the pressure, in atmospheres (atm), at a depth d in the sea (d is in feet). Note that p(0)=1 atm, p(32)=2 an so on. Find the pressure at 200 feet. Type an integer or simplified fraction.

84. ## Algebra

One number is 10 less than twice a second number. Find a pair of such numbers so that their product is as small as possible. I came up with 15 and 5 and those are incorrect

A pizza bx with a square base is to be made from a rectangular sheet of cardboard by cutting six 1-inch square from the corners and the middle sections and folding up the sides. If the area of the base is to be 144 in^2, what size piece of cardboard should

86. ## pre algebra

how do u know the answers shown on the computer for What do they call the international hoola hoop championships?are correct

87. ## math

jared wants to save \$100 to buy a tennis racket.he saves \$8 each week,and his mother gives him an extra \$0.25 for each dollar he save.determine the number of weeks it will take jared to save \$100.

88. ## math

I need to see how to arrange 8-1/5y=10x to mx+b form Is it -1/5y=10x-8? I need the slope and y intercept. Thanks much to who ever helps me. Can anyone show me how to work this?

89. ## math

How can you determine if two lines, plotted on the x-y graph and represented as y=mx + b are perpendicular?

90. ## math

divide 5 1/2 divied by 4 3/5 answer in simplest form. does simplest form mean a mixed number or decimal? I got an answer of 1 9/46 or 1.195652...

91. ## reimbursement methodologies

Could someone check my answers to see if they are correct. Any feedback would be greatly appreciated.. Mrs. Hall was admitted to the hospital for the first time this year on September 15. On September 25, she was transferred to a skilled nursing facility

92. ## ETH/125

Find four to six credible Web sites or articles that support, oppose, or present information about bilingualism in education or politics. I just need help knowing where to look...thanks...

93. ## Stats

A bag has 27 balls in it; numbered 1 through 27; no number repeats. If you select two balls from the bag without replacement what is the probability that both are more than 23?

94. ## math

buses to the stadium leave central station every 10 minutes buses to the zoo leave central station every 16 minutes both buses leave central station at 4 p.m. find the next time both buses will leave central station at the same time.

95. ## PreCalc

Find the standard form of the equation of the ellipse with the following characteristics. foci: (+/-5, 0) major axis of length: 22

96. ## Mat115

16÷(-2)◦(-4) ______________ 2³+ 4 16÷8 _______ 8 + 4 2 = 1 12 6 There is supposed to be a line under the first part of the problem making it a fraction.

97. ## Math Algebra

Complete xy table if x is 1, 2, 3, _, _, 6 and Y is 10,16, _, 24, 38 then create an equation of the function represented by the given data,

98. ## reimbursement methodologies

Can someone please double check my answers. Any feedback would be greatly appreciated..Thanks 1. By creating a committee on social welfare, the American Association of Labor Legislation helped to A. decrease public hospital costs. B. implement fee

99. ## science

Using this concept, what role do we each play in sustaining life on Earth? How do our food choices affect our own consumption of the nonrenewable energy available to sustain life?