# Katy

Popular questions and responses by Katy
1. ## posibility

Three men and three women are waiting to be interviewed for jobs. If they are all selected in random order find the probability of each event. No man will be interviewed until at least two women have been interviewed.

2. ## Probability and Statistics

The proportion of adults living in a small town who are college graduates is estimated to be p = 0.6. To test this hypothesis, a random sample of 15 adults is selected. If the number of college graduates in the sample is anywhere from 6 to 12, we shall not

3. ## IPC

The latent heat of vaporization of water is 540 calories/gram. How many calories are required to completely vaporize 500 grams of water?

Translate into an algebraic expressions:120 is increased by d % and increased by 25% . What is the result ?

5. ## Probability and Statistics

An oil prospector will drill a succession of holes in a given area to find a productive well. The probability that he is successful on a given trial is 0.2. a) What's the probability that that the third hole drilled is the first to yield a productive well?

6. ## Math

Sara and Jenny can both do flips in the air. The ratio of the number of flips Sara can do to the number of flips Jenny can do is 3:8. Jenny can do 120 more flips than Sara. If Sara increases the number of her flips by 3 and Jenny decreases the number of

7. ## Math help!

Simplify the expression (n^4)^8 A. n^(48) B. n^(32) C. n^(12) D. n^4

8. ## analytical chemistry

Any help is greatly appreciated 5mL of a solution A (unknown concentration) was transferred into sic 25mL volumetric flask. The following volumes of a standard solution of A with with a concentration 75ppm were added to the flask: 0mL, 0.5mL, 1mL, 1.5mL,

9. ## math NEED HELP!

How did the temperature change if it increased by 25 % and then decreased by 40% ?

10. ## Algebra 2

There are two spinners. Each spinner is numbered 1-4. Each spinner is spun once. Find the probability of spinning each of the following:2 on the first spinner and a 4 on the second spinner, both numbers the same, 3 on exactly one spinner, one number less

11. ## Calculus

If a rock is thrown upward on the planet Mars with a velocity of 14 m/s, its height in meters t seconds later is given by y = 14t − 1.86t^2. Estimate the instantaneous velocity when t = 1.

12. ## Fluid Mechanics

Water flows into a cylindrical tank through pipe 1 at a rate of 25 ft/s and leaves through pipe 2 at 10 ft/s and through pipe 3 at 12 ft/s. Pipe 4 is an open air vent. Internal diameters of the pipes are: D1=3 in, D2= 2 in, D3=2.5 in, D4=2 in. Calculate a)

13. ## Geography

How does Western Europe's physical geography affect its settlement patterns, economy, and culture? I've looked in the lesson and on google. But all of the websites that look like they might help are blocked. Can someone help, please? I don't need the

14. ## Math geometry

Please help , I only need the second part of the question Betty picks 4 random marbles from a bag containing 3 white , 4 yellow and 5 blue marbles The probability that exactly 1 of the 4 marbles drawn is blue is (0.3535) . The probability that at least 1

15. ## chemistry

8.00g of NaOH are dissolved in water to make 4.00 of solution. What is the concentration of hydronium ions, , in this solution?

16. ## Algebra

The first step to solve for y in y/3= 6 + x is A) to subtract x from both sides of the equation. B) to subtract y/3 from both sides of the equation. C) to divide each term on both sides of the equation by 3. ******* D) to multiply each term on both sides

17. ## Science

Which of the following statements is true? A. There is more water on Earth now than there was millions of years ago. B. There is less water on Earth now than there was millions of years ago. C. There is no way to tell how much water was on Earth millions

18. ## Probability and Statistics (Continuation)

Assume 10% of the engines manufactured on an assembly line are defective. If engines are randomly selected one at a time and tested. What is the probability that the third nondefective engine will be found a)on the fifth trial? b) on or before the fifth

19. ## Math help

In which type of symbiotic relationship is one organism helped while another organism is neither benefitted nor harmed? A: Mutualism B: Predation C: Commensalism D: Parasitism

20. ## Algebra

A rain gutter is made from sheets of aluminum that are 11 inches wide. As shown in the figure the edges are turned up to form right angles. Determine the depth of the gutter that will allow a cross-sectional area of 10 in.². Show that there are two

The area of the base of the regular quadrilateral pyramid is 36 cm2 and the area of a lateral face is 48 cm2. Find: Surface area of the pyramid

22. ## chemistry/engineering

Wet sugar, containing one-fifth water by mass is conveyed through an evaporator in which 85.0% of the entering water is vaporized. Taking a Basis of 100 kg of feed to the evaporator A barrel of oil contains about 6 million Btu and about 1000 Btu is needed

23. ## math

Alottery has 100 tickerts which are placed in a barrel . Three tickets are drawn at random from the barrel to decide 3 prizes . If john has 3 tickets in the lottery , determine his probability of winning : A.first prize. B.first and second prize. C.all 3

24. ## physics

an astronaut rotates at the end of a test machine whose arm has a length of 10.0m. if the acceleration she experiences must not exceed 5g (g=10m/s^2? what is the maximum number of revolutions per minute of the arm?

25. ## Chemistry

The electron configuration for Europium? I think it's 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f7 Is that right? I'm not sure if I did it right with the f block.

26. ## math

trying to find a fraction riddle. I'm a fraction greater than 1/2 and less than 3/4. My numerator is 5 times 1. what fraction am I? How do you explain the answer?

27. ## Math,stat

A smartphone company receives shipments of smartphones from three factories, labelled, 1, 2 and 3. Twenty-five percent of shipments come from factory 1 whose shipments contain 8% defective smartphones. Sixty-five percent of the shipments come from factory

28. ## analytical chemistry

DrBob222, it is me again. Continue the question 5mL of a solution A (unknown concentration) was transferred into sic 25mL volumetric flask. The following volumes of a standard solution of A with with a concentration 75ppm were added to the flask: 0mL,

29. ## Analytical Chemistry

5mL of a solution A (unknown concentration) was transferred into sic 25mL volumetric flask. The following volumes of a standard solution of A with with a concentration 75ppm were added to the flask: 0mL, 0.5mL, 1mL, 1.5mL, 2mL, and 2.5L. The excitation

30. ## Math

The speed of sound in air at sea level at 32 degrees Fahrenheit is 1088 ft/s. If that represents only 22.04% of the speed of sound in ice-cold water, what is the speed of sound in ice-cold water, to the nearest whole number? what i did: 22.04/100 = 32/x i

What is the total mmHg pressure in of a gas mixture containing argon gas at 0.25atm , helium gas at 385mmHg , and nitrogen gas at 345torr. ? sorry i didn't relize i left them out.

32. ## IPC

which one of these is true? Which of the following statements is true? 1) The freezing and boiling temperatures of a substance are the same. 2) The freezing and condensation temperatures of a substance are the same. 3) The freezing and melting temperatures

33. ## chemistry

sorry i forgot some of the units in the initial posting 8.00g of NaOH are dissolved in water to make 4.00L of solution. What is the concentration of hydronium ions, , in this solution?

34. ## Algebra

Write a system of inequalities to describe the shaded area of the graph. This is the question on my homework today that i just don't get. My teacher said to use point slope form. y=y1+m(x-x1) The coordianate points of the triangular area are line 1:

35. ## S.S

WHAT IS THE MONEY CALLED IN SINGAPORE?

36. ## Geography

Drag and drop the descriptions of events to match conditions in each country following world war II china japan korea Taiwan 1. Communist anti-communist forces backed by foreign nations went to war here, dividing the country into North and south **Taiwan

37. ## Math

The table defines a quadratic function What is the average rate of change between x=-1 and x=1 x|y -1|5 0|1 1|-1 3|1 Please explain :/ by the way it already says the answer is -3 i just don't know how.

38. ## biology

How can earth's layers be defined? (two answers) by their amounts of land area by their physical properties(this) by their asthenospheres by their chemical compositions(this) by their proximities to the core the chemical one is right but im not sure about

39. ## Algebra

1.)which of the following is an irrational number? 6.444..... 21/square root(16) 5π/π **** btw these are pi signs π

In the state of Campana, during the Fall season, it rains 75% of the time and it is sunny 25% of the time (these figures are based on historical data). The local weather service every day announces either “Fair” or “Bad”. In the past, 75% of all

41. ## Math

Let f(x)= -3x+4 and g(x)= -x^2 +4x+1. Find and simplify f(-3)

42. ## math asap

Solve the proportion using cross products. 8/20 = k/110 (A)99*^* (B)122 (C)3.3 (D)2.9 Am I correct? please asap

43. ## PreCalc

The temperature T(t) varies sinusoidally on a certain day in December. The minimum temperature is 35 degrees Fahrenheit at midnight. The maximum temperature is 50 degrees Fahrenheit at noon. Let t be the number of hours since midnight (t=o at midnight).

44. ## Maths

Is this statement true? Give an example to support your answer. "If two numbers are divisible by another number then their difference is also divisible by that number". I think that its like this: 3 and 4 is divisible by 12 then 4-3=1 so the answer is no?

45. ## analytical chemistry

Consider a general reaction where a ligand L and a metal ion Mn+ form a complex with m number of ligands (L) coordinated to each metal ions. Assume the metal is colorless. The ligand and metal solutions were mixed at molar fractions (and same total molar

46. ## Social studies

How could a poll tax or a literacy test has been used to prevent someone from voting? The Civil war Amendments Before. After

47. ## Math

Estimate 12 1/2% of 57

48. ## prod and oper management

Hahn Manufacturing purchases a key component of one of its products from a local supplier. The current purchase price is \$1,500 per unit. Efforts to standardize parts succeeded to the point that this same component can now be used in five different

the past three days have been quiet and enjoyable. What is the subject?

50. ## Social Studies

I am so sorry about posting again but I still don't understand the social impact the airplane made at the time when it was invented...

51. ## geometry

Jk=6r,kl=3r and jl = 27

52. ## Social Studies

We watched the Les Miserables movie and were asked to answer a few questions afterwards.I am just unsure if my answers are correct or not for the following questions... 1. How did the Bishop's lie to the police to take cover for Jean Valjean exemplify the

53. ## math

3xsquared + 27 = 5 3xsquared -5x = -3xsquared + 6 SOLVE

54. ## Sociology

Discuss the relationship among gender, ethnicity, and social class. How do sociologists see the connections and stratification among these areas in our society?

55. ## Sociology

Discuss the causes of social change.

56. ## math

Three men and three women are waiting to be interviewed for jobs. If they are all selected in random order find the probability of each event. No man will be interviewed until at least two women have been interviewed.

57. ## Algebra

Solve the system of equations by substitution. Your answer should be given as an ordered pair like this (x, y). Round your answers to the nearest tenth. y=-2+7x 10x-7y=209

58. ## Algebra

A car travels West for 79 miles before turning at an angle of 22° North of East. The car continues on this path for 63 miles and stops. How far is the car from its starting point? Round your answer to the nearest tenth.

59. ## Algebra 2

There are two spinners. Each spinner is numbered 1-4. Each spinner is spun once. Find the probability of spinning each of the following: a 3 on both spinners, 1 on one spinner and a 3 on the other, both numbers less than 4, 3 on at least one spinner.

60. ## astronomy

the radius of earth is 4000 miles, how far would you travel in going around the equator?

61. ## english

metaphors for sports

62. ## Geography/History

Multiple select. The dissolution of the Union of Soviet Socialist Republics _____. 1) had no effect on the United States 2) affected nations throughout the world 3) reduced the number of Communist nations in the world 4) increased the number of Communist

63. ## Geography/History

Incidents of Basque violence are caused by their desire for _____. 1) educational opportunities 2) improved health care 3) increased wages 4) independence I think it is 4. I just want to know if I am right. help?

64. ## Health Information

The ability to accurately predict yearly expenses was one reason that large companies decided to a. offer HMO programs b. enroll in managed care plans c. self-insure their employees d. offer medical spending plans

65. ## pre-algebra

twenty more than three times a number is -4.

66. ## chemistry

8.00 of are dissolved in water to make 4.00 of solution. What is the concentration of hydronium ions, , in this solution?

67. ## science

do you know any enviromentally friendly products, and why they are better for the earth?

68. ## s.s

What is singapore known to export?

69. ## algebra 1`=

for a person 6 feet tall who weighs 200 pounds find a value for k in the equation w = kh^3

70. ## statistics

Using the z-table (Table E) find the critical value (or values) for a = .018 left tailed test.

71. ## mathematics

5/8(16e + 24f - 56g) =

72. ## Algebra

Christion and Jessica want to build a pool in their backyard. However they also have dogs so they do not want the pool to take up all of the backyard. Christion is wondering how much room the dogs will have to run while jessica is concerned about the size

73. ## Biology

Please check my answers ! Which effect of temperature rise causes a feedback resulting in a rise in global temperatures? more water vapor in the atmosphere**** less severe storms less water vapor in the atmosphere more severe storms How does climate change

74. ## Biology

I'm unsure of what a ℉ 31/45 is of a Temperature Range. I'm not sure whether it means hot or cold. But i think it means cold.

75. ## Algebra

Amazon charges a flat rate of \$129 (yearly) for Amazon Prime and \$7.99 for each HD movie rental. Youtube Red charges a flat rate of \$144 (yearly) and \$4.99 for each movie rental. Write an equation to represent Youtube's charges. Explain how you got that

76. ## math

1. Identify the graph(s) whose line may have the given slope. Then, describe your strategy for matching the graphs to the given slopes. a.1/4 b.0 c.5/4 d.-3

77. ## science

At which type of plate boundary would a string of small volcanic islands most likely form? convergent ocean-land boundary**** convergent ocean-ocean boundary transverse boundary divergent ocean-ocean boundary

78. ## Earth science

1.which evidence would confirm that a given rock layer is newer than the layers around it? It has been crumpled and folded, while the other layers lie flat. Other layers have been deposited above it. It is horizontally-oriented. It cuts through all the

79. ## algebra

4^5/4^5 1* 4 5 0 4^7/4^9 -16 1/16* 1/8 8 If they are wrong could you please explain ? :)

80. ## Algebra

An office manager reported that he spent \$350 on gifts for employees. He said that \$240 was spent on clothing with each man receiving a \$20 T-shirt and each woman receiving a \$40 sweatshirt. He said that \$110 was spent on desk accessories with each man

81. ## Algebra

Find the solution to the system of equations by using either graphing or substitution. y+x=3 y-2x=18 (-4.5,7.5) (-5,8) (-6,9) (-7.5,10.5)

82. ## Algebra

Which table represents a function? x|3|-1|1|-1 y|0|4|2|-2 ________ x|0|1|0|2 y|2|3|0|3 _______ x|-2|2|4|-2 y|5|1|5|5 _______ x|5|4|5|1 y|1|5|4|5 I am not sure how to know. So please explain so next time I can know how :).

83. ## Math help!

Simplify: (3cd^4)(-2c^2)(5cd^3) A: 6c^4d^7 B: -30c^4d^7 C: 6c^2d^7 D: -30c^2d^7 I am completely clueless on what the answer would be, help appreciated ;-;

84. ## Equation/Algebra

-2x+5(x+3)=-9 Can someone help me solve this step by step?

85. ## Algebra/equation

6n-4+5n=73 This is my last one thank u. :)

86. ## Algebra

7+8x=-33 How can I solve this? with steps please.

87. ## Algebra

-6q+5.8=23.8 q=3 q=-3*** q=-1.83 q=4.93 This is my last question, but I just want to know how to solve it with steps for further knowing.

88. ## algebra

7x/8=21 a. 24**** b. 18.375 c. 1.857 d. 19 Im not very sure how to solve this.

89. ## Algebra

1.)Which of the following statements is true? Positive numbers are always rational numbers. Negative numbers are always irrational numbers. Negative numbers are sometimes rational numbers.********* Negative numbers are always integers.

90. ## Algebra

1.) Which of the following numbers could be added to 3/16 to make a sum greater than 1/2? 5/16 10/32 2/6 1/4 Which of the following pairs of numbers provides the best estimate of (square root of 45)? (square root of 25) and (square root of 36 (square root

91. ## algebra

Is 84/105 and 128/160 proportional? please explain im so stuck.

92. ## algebra

joey and helen are standing in opposite corners of a rectangular field. if the field has dimensions 120ft by 209 ft, how far apart are they? Please help me solve this and lead me through the problem , thank you. :)

93. ## Algebra

Explain patterns in the placement of the decimal point when multiplying 5 by 10^2, 10 ^1 and 10^0. Please explain i'm not very good with math.

94. ## Algebra

Which operation should be performed first in the expression? 5+7÷7x4-17 Addition Subtraction Multiplication Division***** **Is my answer

95. ## Algebra

Write and solve an equation that represents the following situation 35 people paid a total of 245 for admission to a local soccer game. What is the price of admission. Please help im stuck.

96. ## Algebra

When Jonell checked the temperature in the morning, he saw that it was -4F. Late that afternoon, the temperature was 15F. Select the equation that represents this situation. -4+x=15;x=The number of degrees the temperature rose -4+x=15;x=The current

97. ## Algebra

Question 2 w=10, what is the answer to w+(w-12÷2^2•3)•7 73 66 23 17* Question 3 14-3•4÷6 14 12* 6 3 Question 4---which algebraic expression represents the following:the sum of four times a number and six? 4(x+6) 4(x•6)* 4x+6 x+4•6

98. ## Algebra

Evaluate 5(14-2^3)+8÷2 26* 34 44 56

99. ## math URGENT HELP!!!

The area of the base of the regular quadrilateral pyramid is 36 cm2 and the area of a lateral face is 48 cm2. Find: Lateral area of the pyramid