# pam

Popular questions and responses by pam
1. ## math

A 10 foot ladder is placed against a vertical wall of a building, with the bottom of the ladder standing on level ground 8 feet from the base of the building. How high up the wall does the ladder reach.

2. ## Algebra

The accompanying bar graph shows the milk fat percentages in three dairy products. A=whole milk @4%. B= milk for cream cheese @8%, and C= cream @30%. How many pounds each of whole milk and cream should be mixed to form 200 lb of milk for cream cheese? How

3. ## Physics

A butterfly at eye level is 20 cm in front of a plane mirror. You are behind the butterfly, 50 cm from the mirror. What is the distance between your eye and the image of the butterfly in the mirror? Explain your reasoning. We also have to make a sketch. I

4. ## Math

A model rocket is launched with an initial velocity of 164ft/sec. It's height h, in feet, after t seconds is given by the formula h=164t-16t^2. After how many seconds will the rocket first reach a height of 400ft?

5. ## Math

Evaluate the expression. P(9,4) A.1512 B.240 c.3024 D.15,120 (9) (4) the 4 is underneath the 9 in the parathesis with it A. 15,120 B.126 C.1512 D.240

6. ## math

a 13 ft ladder is placed against a vertical wall of a building, with the bottom of the ladder stand on level ground 5ft from the base of the building. how high up the wall does the ladder reach.

7. ## Physics

If you hold a pocket mirror almost at arm's length from your face,and note how much of your face you can see; to see more of your face, should you hold the mirror closer or farther away , or would you have to get a larger mirror? I tried this, but I could

8. ## chemistry

A 1.20-L container contains 1.10 g of unknown gas at STP.What is the molecular weight of the unknown gas?

9. ## chemistry

if .500 mol of copper combines with .250 mol of sulfur what is the empirical formula of copper sulfide?

10. ## Math

A patio was to be laid in a design with one tile in the first row,two tiles in the second row,three tiles in the third row, and so on. Mr Tong had 60 tiles to use. How tiles should be placed in the bottom row to use the most tiles?

11. ## Algebra

A scientist wants to research the potential spread of germs by contact. She knows that the number of possible handshakes within a group of n people is given by the equation N=1/2(n^2-n). Everyone at a party shook hands. There were 253 handshakes in all.

12. ## Math

A train leaves a station and travels north at a speed of 45mph. Four hours later, a second train leaves on a parallel track and travels north at 105 mph. How far from the station will they meet? The trains will meet ________ miles away from the station

13. ## Math

The first term is 23, and the common difference is 4 ; n= 5

14. ## Math

A basketball player scored 18 times during one game. He scored a total of 35 points, two for each two point shot and one. For each free throw. How many two point shots did he make? How many free throws?

15. ## Math

The leaning tower of Pisa is 55.9 m tall and leans 5.5 degrees from the vertical. If its shadow is 90 m long, what is the distance from the top of the tower to the top of the edge of its shadow, assuming the ground around the tower is level?

16. ## Algebra

In 1991, the life expectancy of males in a certain country was 67.2 years. In 1995, it was 71.1 years. Let E represent the life expectancy in year t and let t represent the number of years since 1990. The linear function E(t) that fits the data is E(t) =?t

17. ## Chemistry

1) Determine the equilibrium constant, Keq, at 25°C for the reaction 2Br– (aq) + I2(s) ⇌ Br2(l) + 2I– (aq) My wrong answer: 7.6e-10 2) Aluminum metal is formed by the electrolysis of Al2O3 in molten cryolite. How many minutes are required to form

18. ## Physical Science

How much heat is necessary to change 20 g of ice at 0 degrees C into water at 0 degrees C?

19. ## Enlish-College

Why could one say that "Shall I Compare Thee to a Summer's Day"? presents contrast rather than comparison? The poem I am referencing in quotations is by Shakespeare.

20. ## Math

Pen has 1/2 cup and 1/8 cup measuring cups. What are two ways he could measure out 1 3/4 cups of flour? Plz help thanks!

21. ## Math

An architect has allocated a rectangular space of 264ft^2 for a square dining room and a 10ft wide kitchen. What is both the width of the square dining room and the length of entire space.

22. ## physics

An iron wire has a cross-sectional area equal to 1.20 10-5 m2. Carry out the following steps to determine the drift speed of the conduction electrons in the wire if it carries a current of 34.0 A. (a) How many kilograms are there in 1.00 mole of iron? 1

23. ## Math

In how many ways can 4 people be chosen and arranged in a straight line, if there are 5 people from whom to choose? A shirt company has 3 designs that can be made with short or long sleeves. There are 5 color patterns available. How many different types of

24. ## Math

8 students share 5 square pieces of cake equally. Draw to show how much each person gets.

25. ## calculus

find volumes of solids generated by revolving the regions bounded by the graphs of the equations about the given lines. y=square root of x y=0 x=3

26. ## Math

The number of tickets sold each day for an upcoming performance is given by N(x)=-0.3x^2+9x+15, where x is the number of days since the concert was first announced. When will daily ticket sales peak and how many tickets will be sold that day?

"Tommy has 16 toy trucks. How many different arrays can he make with all the trucks?What are the arrays?"

28. ## Algebra

Two angles are complementary. Their difference is 50^*. Find the angles.

29. ## math

As a fundraiser a school club is sellin posters. The printer charges a \$24 set up fee plus \$o.20 for each poster. Then the cost y in dollars to print is given by the linear equation y=0.20x+24 A. The printing of 50 posters cost? The printing cost of 100

30. ## math

To determine the number of trout in a lake, conservationist catches 161 trout, tags them and throuws them back into the lake. Later, 39 trout are caught: 13 of them are tagged. How many trout would the conservationist expect to be in the lake?

31. ## Statistics

The intermediate answers from some calculations based on whole number scores are X= 4.3467892 and Y= 3.3333. For the next step, after rounding, what values of X and Y do we use?

32. ## Algebra

Could someone help me with finding an equation of the line containing the given pair of points (3,2) and (9,7)

33. ## math

a 20-foot ladder is placed against a vertical wall of a building, with the bottom of the ladder standing on level ground 16ft from the base of the building. how high up the wall does the ladder reach?

34. ## math

the speed of train A is 14 miles slower than train B. train A travels 210 miles in the same time it takes train B to travel 280 miles. Whats the speed of each train?

35. ## Math

Lisa attended 72% of 32 school events. How many schol events did Lisa not attend? my answer is 8

36. ## TRIG

5. A wheel 5.00 ft in diameter rolls up a 15.0° incline. How far above the base of the incline is the top of the wheel after the wheel has completed one revolution? A. 4.07 ft B. 13.1 ft C. 8.13 ft D. 9.07 ft

37. ## psychology

the fundamental idea behind natural selection is that, within a particular environment, a genetically influenced trait tends to be more successful and thus able to survive and be passed on. Environmental psychologists examine the ________ that led to

38. ## science

A pyramid of numbers demonstrates that a community has a) producers who depend on consumers for food b) more producers than primary consumers c) the same number of organisms at each level d) more consumers than producers e) no loss of usable energy B

39. ## computer

• Compare and contrast LANs, WANs, CANs, MANs, and HANs in 200 to 350 words.

40. ## English 1

Revise the following paragraph, improving it without changing its overall meaning. Pay particular attention to any potential sentence fragments. Cooking is not as easy as it looks. For example, the terminology. Selecting the freshest ingredients for

41. ## English-College

I guess I don't understand the question(why the quote presents contrast rather than comparison) my book is asking. I'm new to this poetry thing, please help!

42. ## Calculus-Help! I don't know how to do these..

ie: As x (arrow) -3, f(x) (arrow) ?. This is the actual question. The others are just like it. Once answered, we are to graph it. I have no idea how to do this. Thanks.

43. ## Probability

Roll two fair dice. what is the probability that you get a 2 and a 5 without regard to which is on which die? What is the probability of at least one 2 or one 5? What is the probability of a sum of 7? "what is the probability that you get a 2 and a 5

44. ## science

A pipe of diameter 80mm is fitted with a branch section into which fit two pipes of equal diameter. If it is desired that the velocity remain constant throughout, determine the required diameter of each of the branch pipes.

45. ## Math

One day 3/8 of the students in Jack's class ate toast for breakfast. Another 1/8 of the students ate oatmeal. Jack added the fractions and found the sum was 7/8. Which statement best describes the sum 7/8? A) It is reasonable because 1/2 + 0 = 1/2. B) It

46. ## Chemistry

How do I prepare 1liter of a 93.1% w/w solution of sulfuric acid using 98% sulfuric acid and water?

47. ## Algebra

The sum of two numbers is 9. Four times the larger number plus three times the smaller number is 48. Find the numbers. Thank you

48. ## Math

The number of tickets sold each day for an upcoming performance of Handel,s Messiah is given by N(x)=-0.4^2+8.8x+10, where x is the number of days since the concert was first announced. When will daily ticket sales peak and how many tickets will be sold

49. ## Algebra

\$5400 is invested, part of it at 10%, and part of it at6%. For a certain year, the total yield is \$444.00. How much was invested at each rate?

50. ## math

north avenue is 36ft wide when it ends at main st. a 45 foot long diagonal crosswal allows pedestrians to cross main st to or from either corner of north ave. determine the width of main st.

51. ## math

a triangular traffic island has a base half as long as its height. the island has an area of 121m^2. find the base and the height.

52. ## math

sue an shovel snow from her driveway in 55 minutes. Bill can do the same job in 60 minutes. how long would it take if they did it together.

53. ## Statistics

4. The data below are from an independent-measures experiment comparing three different treatment conditions. Treat. 1 Treat 2 Treat 3 0 1 4 0 4 3 G=24 0 1 6 2 1 3 Σ X² = 92 T=2 T=6 T=16 SS=3 SS=9 SS=6 Use an analysis of variance with α of .05 to

54. ## math

substract; than reduce answer to lowest terms 5/22- 1/41

55. ## Chemistry

A solution of ammonia and water contains 2.90×1025 water molecules and 9.00×1024 ammonia molecules. How many total hydrogen atoms are in this solution? any help would be great.

56. ## psychology

Critical thinking requires you to: A) Accept the simple answer and not make it complicated. B)tolerate uncertainty, even if you fell pressure to come up with an answer. C)decide it is either this or that and don't get hung up on dreaming. D) trust the

57. ## science

The following statement is a vaild scientific theory. If Watson and Crick had not discovered the structure of DNA, bio - technology would be 20 years behind where it is today. TRUE FALSE true

58. ## Grammar

Which sentence does the verb have a direct object? She is insecure. or They won the game. I cannot tell which is correct.

59. ## calculus

A 384 square meter plot of land is to be enclosed by a fence and divided into equal parts by a fence parallel to one pair of sides. What dimensions of the outer rectangle will minimize the amount of force used?

60. ## Psychology

Explain what the quote “The person I am mournfully greets the person I might have been,” means in the context of a mid-life transition.

61. ## Math

If f (x)= x^2-1 and f(2a)=35, then what could be the value of a ?

62. ## Anatomy

Why is feedback and homeostasis so important? How do they connecf? What would be the consequence if the homeostasis was not stable.

63. ## Anatomy

What is the the muscles nervous systems ? Muscles are: Smooth muscle Skeletal muscle Cardiac muscle

64. ## English

3 quotes for fiction signposts. For the book called Bird by bird by anne lamott

65. ## Math

What is an example of a real world relationship where there is no clear independent or dependent variable

66. ## Chemistry

I have asked this question before but I was not clear enough. I want to prepare a 37% w/w solution (in water)of sulfuric acid from 96% sulfuric acid. I need around 500ml, I know it won't be exactly that, I want to know how to use the conversion using

67. ## algebra

solve for x Inx-In5=0 x=5 n=0

68. ## statistics

You measure 64 children , obtaining a X of 57.28 . The mean is 56 and sd is 8 Slug says that bc this X is so close to the mean of 56 , this sample could hardly be considered gifted. A. Perform the appropriate statistical procedure to determine whether he

69. ## statistics

1. What two aspects of data determine which measure of central tendency to use? 2. Why is it best to use the mean with a normal distribution ?

70. ## Math

On what day in the year 1943 was the year 300 000 minutes old?

71. ## algebra

In mixing a weed killing chemical a 40% solution of the chemical is mixed with an 85% solution to get 20 L of a 60% solution. How much of each solution is needed?

72. ## Chemistry

Nitrogen dioxide reacts with carbon monoxide to produce nitrogen monoxide and carbon dioxide in the reaction, . The first step in the reaction is proposed to be two NO2 molecules colliding to form NO3 and NO. The NO3 intermediate then reacts with CO to

73. ## Math

If a spherical tanl 4m in diameter can be fillef with a liquid for \$900, find the cost to fill a tank 12m in diameter. The cost to fill the 12m tank is \$__.

74. ## Algebra

\$6300 is invested, part of it at 11% and part of it at 8%. For a certain year, the total yield is \$597.00. How much was invested at each rate?

75. ## Algebra

\$6300 is invested, part of it at 11% and part of it at 8%. For a certain year, the total yield is \$597.00. How much was invested at each rate?

76. ## Algebra

The formula r =2 sqrt.5L can be used to approximate the speed r, in miles per hour, of a car that has left skid marks of length L, in feet. How far will a car skid at 60 mph?

77. ## algebra

explain to me why the first coordinate of the y intercept is always 0 please.

78. ## Math

Find the slope, if it exists, of the following line. X=2/15

79. ## Math

Find an equation of the line having the given slope and containing the point. M=-8,(1,8)

80. ## Math

An architect has allocated a rectangular space of 666ft^2 for a square dining room and a 19ft wide kitchen. Find the width of the square dining room and the length of the entire rectangular space.

81. ## Math

A 26ft ladder is placed against a vertical wall of a building, with the bottom of the ladder standing on level ground 24ft from the base of the building. How high up the wall does the ladder reach?

82. ## Science/Biology

Pick the correct answer to the following question. Write a brief statement explaining why each choice of answers is correct or incorrect. In diabetes mellitus, because of insufficient insulin production, glucose cannot enter cells. instead it accumulates

Pick the correct answer to the following question. Write a brief statement explaining why each choice of answers is correct or incorrect. In diabetes mellitus, because of insufficient insulin production, glucose cannot enter cells. instead it accumulates

84. ## Chemistry Honors

Hydrogen burns to give water. If 200cm3 of H2 reacts with 150cm3 of O2 what volume of water vapor is produced

85. ## physics

A man is 3/8th of the way across a railroad bridge when he hears a train coming. He knows that this passenger train cruises along at 60 MPH in this area. It turns out that he can run to either end of the bridge and jump off just ahead of the train.

86. ## math

10cm^3 of a normal specimen of human blood contains 1.2g of hemoglobin. How many grams does 22cm^3 of the same blood contain?

87. ## chemistry

calculating the molarity of acetic acid in a vinegar sample given that 5.00 of vinegar required 43.50 mL of 0.1050 M NaOH to just reach the methyl red endpoint.

88. ## math

a sameple of 137 firecrackers contained 6 duds. how many duds would you expect in a sample of 2466 firecrackers?

89. ## Chemistry

If you have 20.0g of a Maalox tablet, and 40mL of .1 M HCI, how much extra help from NaOH would you need to bring the acid to neutral? Back titrate using .05 mL NaOH, drop by drop. Please put this into a formula for me to figure out. Thanks.

90. ## Statistics

4. The data below are from an independent-measures experiment comparing three different treatment conditions. Treat. 1 Treat 2 Treat 3 0 1 4 0 4 3 G=24 0 1 6 2 1 3 Ó X² = 92 T=2 T=6 T=16 SS=3 SS=9 SS=6 Use an analysis of variance with á of .05 to

91. ## graphs in math

C varies inversely as J. If C = 7 when J = 0.7, determine C when J = 12

92. ## Algebra2

Check Please? Determine if the given function is even, odd or neither. 1. f(x) = 3x^4 - 2x^2 =Even. 2. f(x) = x^3 + x = Odd.

93. ## algebra

the speed of train A is 8 mph slower than the speed of train B. Train A travels 220 miles in the same time it takes train B to travel 260 miles. Find the speed of both trains. Speed of train A = Speed of train B =

94. ## Fin

A \$50,000 loan is to be amortized over 7 years, with annual end-of-year payments.

95. ## Accounting

Comment on Dr. Hendley's statement that the difference between the opening bank balance (\$30,000) and the January balance (\$75,000) is pure profit.

96. ## math

If a man runs for an hour and a half at 8 miles an hour due south; and then he continues south on a bus traveling at 55 miles an hour, for 24 minutes. How far did he travel?

97. ## economics

which is a real life example of a market that is close to perfect competition a.a computer monopoly b.an oil and gas cartel c.farmers market d.public school system.

98. ## Chemistry

Prepare a 0.025M solution of Glucose by diluting a 1M Glucose solution. What and how much did you mix together?