# Martha

Popular questions and responses by Martha
1. ## math

Joanne and Ed Greenwood built a new barn with an attached arena. To finance the loan, they paid \$1,307 interest on \$45,000 at 4.0%. What was the time, using exact interest?

2. ## Maths

If 3,A,B,192 are consecutive terms of a gp . find the values of A and B

3. ## geometry

Triangle DEF contains two congruent acute angles. The sum of the measures of the two congruent acute angles is greater than 90 degrees. Anna concludes that the triangle must be an acute triangle. Which best describes her conclusion?

Sam Long anticipates he will need approximately \$225,000 in 15 years to cover his 3-year-old daughter’s college bills for a 4-year degree.How much would he have to invest today at an interest rate of 8 percent compounded semiannually?

5. ## Calculus

An air ambulance is travelling from Barrie to Toronto. Toronto is located 90 km [S5°E] of Barrie. If the wind is blowing from the South with a velocity of 42 km/h, and the plane’s air speed is 400 km/h, what direction must the pilot fly to make it to

6. ## science

A 0.513 M solution of a weak base has a pH of 11.4. What is the Kb of the base?

7. ## physics

52.(52G) A 110-kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 350 N. For the first 15 m the floor is frictionless, and for the next 15 m the coefficient of friction is 0.30. What is the final speed of the crate?

8. ## Mathematics

There are 2 red cars and 3 blue cars. The 5 cars contain a total of 12 people. No car has more than 4 people. Every car has at least 1 person. The only cars with the same number of people are the red cars. How many people are in 1 red car?

9. ## Chemistry

74. Sodium hydrogen carbonate is also known as baking soda. When this compound is heated, it decomposes to sodium carbonate, carbon dioxide, and water vapor. Write the balanced equation for this reaction. What volume of carbon dioxide gas at 77 degrees C

10. ## statistics

A clinical trial test a method designed to increase probability of conceiving a girl.In study 375 were born and 300 were girls Use sample data to construct 99%confidence interval of percentage girls born

11. ## algebra

a rocket is launched at the top of a building. the height of the rocket (in meters) written in terms of time (seconds) can be modeled by h(t)=-4.9t^2+9.8t+73.5. what is the maximum height?

12. ## Geometry

In geometry, a common standard setting for enlarging on a copy machine is 121 percent. What does this mean?

13. ## Math

Six cards numbered 1 through 6 are placed in a hat. One card is taken from the hat. The unit's digit of the sum of the numbers on the remaining cards are 9. What was the number on the card taken from the hat?

14. ## Human services

find at least three examples of mission statements for human services organizations. show how each one of the mission statements does or does not meet the requirements of a good mission statement. Then determine what other purpose or function the mission

15. ## Maths

A group of office workers had some prize money to distribute among themselves. When all but one took \$9 each, the last person only received \$5. When they all took \$8, there was \$12 left over. How much money had they won? I keep getting \$68 but the answer

16. ## development studies

Namibia's economic history from the 19th century

17. ## math

Find the value of C that will make 25x^2-40x+c a perfect trinomial.

18. ## chemistry

treatment of a 0.3203g sample of impure soduim chloride with an excess of AgNo3 resulted in the formation of 0.7331g of AgCl. how many grams of sodium chloride were in the sample? What is the weight percentage of NaCl in the sample?

19. ## grammar

Although the abscess was incised and drained in the emergency room and cultures were obtained, which grew coag-positive staphylococcus.

20. ## english

i don't get how to write a motivator for an expository essay?

21. ## keybording and word processing

7. The main difference between block letter style and modified block letter style is/are the A. left and right margin settings. B. punctuation style. C. position of the date and closing lines. D. line spacing. 8. What word processing feature protects

22. ## chemistry

What is the balanced equation of the reaction between ammonium ion amd water?

23. ## chemistry

What is the difference between the reaction of hydrochloric acid and water amd ethanoic acid and water?

24. ## chemistry

What os the balanced equation for the reaction between ethanoic acid and water?

25. ## chemistry

What is the balanced equation for reaction between hydrochloric acid and water?

26. ## Chemistry

Consider a mixture of two gases,A and B, confined in accosted vessel. A quantity of a third gas C, is added to the same vas sekar the same temperature. How does the addition of gas C affect the following: a. The partial pressure of gas A. b. The total

27. ## MATH

In a race, a triathlete runs 1/3 of total distance, cycles 2/5 of the total diatance and swims the ramaining distance. he swim 1.200 meters. What is the total distance of the race?

a snail travels about 0.13 cm in one minutes.how far would it travel in 7 minutes if it keeps up the same speed?About how long would it take to go 3 m?

29. ## Spanish

Can someone proof my spanish composition? Aprenda a vivir con la diabetes tipo 2 La diabetes tipo 2 es, desafortunadamente, una enfermedad muy común en los EEUU. Si usted ha sido diagnosticado con la diabetes tipo 2, es normal sentirse confundido, triste

30. ## Math

Assume the shoe is sold at 50% profit margin (profit as % of sales). If the cost of raw material were to increase by 50%, what would the new profit margin be? Cost of manufacturing a shoe: Raw materials = 25% Labor = 12.5% Marketing & Advertising = 25%

31. ## Math

If x varies directly as y, and if x = 6 when y = 15, find y when x = 30

32. ## Geometry

How many diagonals does a prism have whose base is a regular polygon with 3 sides?

33. ## physical science

A 12-kg iron ball is dropped onto a pavement from a height of 90m. Suppose half of the heat generated goes into warming the ball. What is the temperature increase of the ball in degree C

34. ## Physics

What is the magnitude of the electric field 0.3 m from a 10-4 C point charge?

35. ## Physics

Assuming that the Earth is spherical and recalling that latitudes range from 0° at the Equator to 90° N at the North Pole, how far apart, measured on the Earth's surface, are Copenhagen (55.67° N latitude), and Rome (41.90° N latitude)? The two cities

36. ## math

only 5% of the carbon-14 in a small wooden bowl remains , how old is the bowl? Hint, half-life for carbon –14 us 5730 years

37. ## chemistry

treatment of a 0.3203g sample of impure soduim chloride with an excess of AgNo3 resulted in the formation of 0.7331g of AgCl. how many grams of sodium chloride were in the sample? What is the weight percentage of NaCl in the sample?

38. ## chemistry

treatment of a 0.3203g sample of impure soduim chloride with an excess of AgNo3 resulted in the formation of 0.7331g of AgCl. how many grams of sodium chloride were in the sample? What is the weight percentage of NaCl in the sample?

39. ## grammar

5.After lengthy discussion, it was decided the patient would continue to be treated in the hospital. Is there any conjuction in this sentence.

40. ## theory of dressmaking

what is disposal of fullness

41. ## chem 121

We did a lab separating out the components of a mixture. One of the lab questions is "The weight of naphthalene was obtained by weighing the collected solid. Was this an accurate weight of the naphthalene present in the original sample?" I don't know how

42. ## civics

who are some good citizens? for example terry fox or mother teresa. i need people other than them

43. ## history

what year was insulin invented in?

Hi, I am working with a group of children and my goal is to assist them in improving their reading. The children are between the ages of 7 and 8 and they are struggling in reading and fluency. I did a few phonogram lessons, as well as some reading and

45. ## human health

find at least three examples of mission statements for human services organizations. show how each one of the mission statements does or does not meet the requirements of a good mission statement. Then determine what other purpose or function the mission

46. ## geo area & volume

ok it asks me 2 find the lateral area of the cylinder ( the radius is 5 n the hight is 5) can some 1 help me with this please 392.5 Prinness, I think that 392.5 is pi*r^2*h, or the volume of the cylinder. This question asks for the lateral area. Lateral

a). How many ways can a person select three appetizers and two soups if there are six appetizers and five soups on the dinner menu? b). Three married couples have bought tickets for six seats in a row for a movie. - HOw many ways can they be seated? - How

48. ## Algebra

Write equation to show x=number of hours reservoir is draining at rate of 25 gallons per hour, y=the number of gallons in reservoir is 200

49. ## chemistry

how to calculate work in a bomb calorimeter

50. ## math

The Department of Foreign Languages of a liberal arts college conducted a survey of its recent graduates to determine the foreign language courses they had taken while undergraduates at the college. Of the 530 graduates 205 had at least one year of

51. ## Social Studies

Use the passage to answer the question. “This great nation will endure as it has endured, will revive and will prosper. So, first of all, let me assert my firm belief that the only thing we have to fear is fear itself—nameless, unreasoning, unjustified

52. ## Social Studies

Which of the following was true of people moving to suburbs and purchasing automobiles? A. Women were allowed to drive and thereby gained more freedom. B. It was a lifestyle only the wealthy could afford. C. Women were left isolated all day as men took the

53. ## Math

1. Find the area of a parallelogram with base b and height h. b = 87 cm h = 18.6 cm (1 point) My answer: 211.2 cm (2)

54. ## AP chem

The equilibrium constant for the reaction PCl3(g) + Cl2(g) ⇀↽ PCl5(g) is 35000 at 760 ◦C. At equilibrium, the partial pressure of PCl5 was 160 bar and that of PCl3 was 9.85 bar. Calculate the equilibrium partial pressure of Cl2. Answer in units of

55. ## Physics

An anti aircraft gun fires at an elevation of 60degree at an enemy aircraft at 10000m above the ground.at what speed must the cannon be shot to hit the plane at that height?(take g = 9.8m/s.)

56. ## Algebra

1. simplify (9/121) ^ 3/2 i got 13.5/181.5 but it is wrong 2. 16 ^1/4 - 49 ^1/2 I got -3, but it is wrong thank you!

57. ## Science

Convert this binary into English. 01001000 01100101 01111001 00101100 00100000 01100111 01101111 00100000 01100110 01110101 01100011 01101011 00100000 01111001 01101111 01110101 01110010 01110011 01100101 01101100 01100110 00101110

58. ## Math

How many real-number solutions does the equation have? -7x^2+6x+3=0 a) 1 b) 2*** c) none d) infintely

59. ## american gov

Based on the excerpt, which statement best illustrates the impact of Lincoln’s proclamation on government? A >It increased the influence of the legislative branch. B. It caused the voters to elect a Democratic Congress. C> It allowed slaves to vote

60. ## chemistry

Why does CdS dissolve in HCL, when CuS and Bi2S3 will not?

61. ## math

I need to paint 2 walls of 125 feet long (W)x 8 feet tall (Height). how many gallons of paint do I need to buy to cover all the walls?

62. ## Math

On Saturday, Paula sold all her mangoes, oranges and grapefruits at the market. 60% of the fruits were mangoes, 25% of the fruits were oranges, Paula had 45 grapefruits. What percentage of the fruits sold were grapefruits?

63. ## SCIENCES

the major commercial aluminium ore is bauxite,AlO3.H2O(s).What is its molar mass?The analysis of a representive sample of bauxite shows it contains 70% by mass of Al2O3..What is the maximum mass of aluminium metal that could be obtained from 200kg of

64. ## Chemistry

Use the Henderson Hasselbalch equations to solve for the Ka of the acid. Solution [HX]=0.200M and [NaX]=0.200M. They both have a pH of 4.11.

65. ## chemistry

How can lime be used yo improve the quality of soil degraded by industrial pollution?

66. ## chemistry

What will be the color of litmus paper when tested with lime?

67. ## chemistry

What is the name of the acid produced when CO2 reacts with water?

68. ## chemistry

What is the gas produced when lime is heated?

69. ## chemistry

How does ammonium ion act as an acid in the reaction between ammonium ion and water?

70. ## chemistry

A titration to standardize a HCl solution was performed by taking 50.0ml hydrochloric acid in a flask with a few drops of phenolphthalein indicator. The burette was filled with 0.15 molar NaOH. The initial reading of the burette was 0.50ml and the final

71. ## chemistry

A 20ml hydrochloric acid is diluted by 80ml of distilled water, what would be the pH of the hydrochloric acid after the dilution?

72. ## chemistry

What will be the pH of hydrochloric acid after 0.01M of hydrochloric acid is diluted by the addition of 80ml distilled water?

73. ## Trig

Find all solutions in the interval [0,2pi) 4sin(x)cos(x)=1 2(2sinxcosx)=1 2sin2x=1 2x=1/2 x= pi/6, and 5pi/6 Then since its 2x i divided these answers by 2 and got pi/12 and 5pi/12 However, when i checked the answer key there solutions 13pi/12 and 17pi/12

74. ## Math

I need help solving for all solutions for this problem: cos 2x+ sin x= 0 I substituted cos 2x for cos^2x-sin^2x So it became cos^2(x)-sin^2(x) +sinx=0 Then i did 1-sin^2(x)-sin^2(x)+sinx=0 = 1-2sin^2(x)+sinx=0 = sinx(-2sinx+1)=-1 What did i do wrong?? the

75. ## history

namibia's econoy during the 19th century

76. ## precalculus

Can you please check and correct my answers? Convert to Rectangular: r*tanΘ/secΘ=2 ________________________________________ y=2 y=½ x=2 x=½ answer: y=2 Given: 5cos6Θ What is the shape of the function? ________________________________________ Limacon

77. ## 8th algebra

I only need help writing the equation, not solving it. This is sothe problem. Manuel's budget allows no more than \$50 per week for gasoline and car washes. Gasoline costs \$2.30 per gallon, and a car wash costs \$8.50. This week, Manuel gets a car wash.

78. ## Algebra

Please how I solve this equation giving the domain of -3 I know that i have to replace the -3 where the x is but I do not know how to solve with the fraction. Thank you. -2x+1/3y=4

79. ## partial maths

x^3/(5x^3-1) resolve into a partial fraction

80. ## Math

On a centimeter dot grid, draw all the possible rectangles with a perimeter of 14 cm and sides whose lengths are whole centimeters. Label the lengths of two adjacent sides of each rectangle.

81. ## math

How many decimal digits in 2.00? 2 or 0?

82. ## life orientation

Three human rights violations and their examples

83. ## solomon mahlangu high

Identify three courses or study fields you are interested in following after grade12 write them down in order of preference

84. ## 6th grade math - ratios

There are 39 counters in a box. How would you divide the counters to represent the ratio 5:8 ? Thank you.

85. ## 6th grade math median range mode

The numbers are 47, 55, 46, 64, 69, and 52..... What is the mode?...I can't figure this out because I thought the mode was the number that appears most often. Thank you.

A circular path two feet wide has an inner diameter of 150 feet. How much farther is it around the outer edge of the path than around the inner edge ?

87. ## circumference...math

A Ferris wheel makes 12 revolutions per ride. How far would someone travel during one ride if the diameter is 63 feet?...thanks!

88. ## Math

9 people are coming to Sam's party. If each person eats 1/5 of the cake, how many slices does each person get?

89. ## Sixth Grade Pre Algebra

Can someone please help me ? I think I'm supposed to put all the like terms together, but I can't remember how to do this. I asked my mom but she can't remember. Solve for x 6x - 6 equals 2x - 26 Solve for x 2x - 1 equals -5x - 85 Thank you very much. Can

90. ## chem

A 1.27-g sample of a mixture of AgNO3 and NaNO3 is treated with excess Na2S(aq). The precipitate is filtered off, dried and weighed. The dried precipitate weighs 0.46 g. What is the percentage by mass of NaNO3 in the original mixture?

91. ## Calculus

Let u=f(r) and r=|x|=(x1^2 +···|xn^2)^1/2. Show that􏰀 ∑ 1 to n (∂u/∂xj)^2 = (f′(r))^2

92. ## math

order of operations; simplify 4.5-10-2(1-2)+5 thank you!

93. ## math

is the number 1 a prime or composite number?

94. ## Kgothala secondary

Life oriatation, description of recent service delivery protest

95. ## Kgothala secondary

Life oriatation

96. ## life orientation

Evaluation of current protests

97. ## life orientation

Research on process of campaigns and protests

98. ## science

How might the history of the US be different if the first European settlements had occurred on the west coast instead of the east coast

99. ## english

I have to find the correct article that goes in the sentence. 1.)Usually ___ strange bird is a timid animal. Article- the.