# selena

Popular questions and responses by selena

A. 75 % B. 12.5% C. 25% D. 3.13% E. 9.38% 3. what percentage of land on the earths surface is inhospital lands? - B 4. what percentage of earths surface is covered by land? - C 5. what percentage of land on earth is usable, for living on, but not for

2. ## Algebra 1b!

Could you guys check my answers? 1. Graph the function and identify the domaine and range. y=-1.5^2 Domain; (-,+) Range; (-,0) ( my answers.) 2.How is the graph of y=-2x^2-5 different from the graph of y=-2x^2 It is shifted units up it is shifted 5 units

3. ## Math

The probability of winning a large stuffed animal in the ring-toss game at a fair is 10%. Find the probability of winning at least 5 of 50 games using normal approximation. I got 0.4052 but answers says it's 0.5932. Please help!

4. ## United states history

What similarities do you see between the United States today and the United States of the past? What issues and problems do we continue to grapple with? What successes do we share with Americans in the past? I want to find something now in united states

5. ## Physics

An 1750 kg weather satellite moves in a circular orbit with a gravitational potential energy of 1.69 x 10^10 J. At it's location, free-fall acceleration is only 6.44 m/s^2. How high above Earth's surface is the satellite?

6. ## NM social studies

How were the Maya and Aztecs civilizations similar? A. They both lacked a strong government. B. They both developed complex mathematical and calendar systems.** C. They both used weapons superior to those of early eastern civilizations. D. These

7. ## math

daffynition decoder

8. ## Operating Systems

Given that main memory is composed of only three page frames for public use and that a seven-page program (with Pages a, b, c, d, e, f, g) that requests pages in the following order: a, c, a, b, a, d, a, c, b, d, e, f. Using the FIFO page removal

9. ## Earth space science

I need help with this. the map doesnt show anything and idk how to post the map on here... Match the cities A,B,C, and D with the weather description of the surface model (To the right of each letter) a. city A b. City B c. City C d. City D A. Pressure of

10. ## Earth space science, check answers?

A. 75 % B. 12.5% C. 25% D. 3.13% E. 9.38% 3. what percentage of land on the earths surface is inhospital lands? - B 4. what percentage of earths surface is covered by land? - C 5. what percentage of land on earth is usable, for living on, but not for

11. ## science

chemical reaction in cells that needs oxygen to release energy and produce carbon dioxide and water as waste 1)breathing 2)exhaling c)inhaling d)respiration

12. ## US Gov't

Which Roman contribution to political theory was adapted by the Founding Fathers?

13. ## Algebra

A ball is thrown into the air. The height in feet of the ball can be modeled by the equation h = -16t2 + 20t + 6 where t is the time in seconds, the ball is in the air. When will the ball hit the ground? How high will the ball go?

14. ## English 2

Write an essay of at least 250 words that describes and explains examples of figurative language you found in Animal Farm when you completed your response journal on that topic. Include one example of each of the five types of figurative language from the

15. ## Chemistry

Consider the chemical reaction below equated 2N2O5 (g) -> 4NO2 (g) + O2 (g) knowing that a certain period of time, N2O5 consumption rate is 0.10 mole / s, determine for the same time interval: a) the average rate of formation of NO2 b) the average speed O2

16. ## physics

A vehicle moves in a straight line with an acceleration of 5 km/h^2.By how much does the speed change each second?Answer in units of km/h

17. ## Chemistry

What is the temperature change in celsius when 29.5L of water absorbs 2.3 kwh of heat?

18. ## math

Josh poured 38 gallons of water into 6 buckets. He poured the same amount into each bucket. How much water did Josh pour into each bucket?

19. ## physics

hiw much heat is needed to raise the temperature of 0.800 kg. ethyl alcohol form 15.0 celcius to its boiling point 78.3 celcius

20. ## Chemistry

Combustion analysis of 0.300 g of an unknown compound containing carbon, hydrogen, and oxygen produced 0.5213 g of CO2 and 0.2835 g of H2O. What is the empirical formula of the compound? C2H5O C3H8O2 C2H10O3 C2H5O2

21. ## Math

what is the difference between |-3| and -3.

22. ## physics

A metal rod is 40.125 cm long at 20 °C and 40.148 cm long at 35 °C. calculate the coefficient of linear expansion of the rod for this temperature range.

23. ## physical education

What nutritional supplement is recommended for helping the body handle stress? A. Zinc B. Iron C. Vitamin C D. No supplements are recommended for stress management I think its a but im not sue please help

24. ## Algebra 1b!

1. Find the excluded value of x for the polynomomial expression 4x/6 a. 6 b. -6 c. 1/6 d. -1/6 2. Simplifly 3-2x/7 + 4x+5/7 a. 2x+8/14 b. 2x+8/7

25. ## Algebra help?? Stuck!

The equation y=−0.065x2+6.875x+6200 models the amount y of sugar (in pounds per square foot) produced where x is the amount of fertilizer (in pounds per square foot) used. What is the best approximate for the amount of sugar produced when 3 pounds per

26. ## chemistry

Some physical properties of water are shown below: melting point 0.0°C boiling point 100.0°C specific heat solid 2.05 J/g·°C specfic heat liquid 4.184 J/g·°C specific heat gas 2.02 J/g·°C ΔH° fusion 6.02 kJ/mol ΔH° vaporization 40.7 kJ/mol 80.0

27. ## Pre-Algebra

For numbers 1–3, find the indicated measurement of the figure described. Use 3.14 for (pi) and round to the nearest whole number. 1) Find the surface area of a sphere with a radius of 8 cm. a. 268 cm2 b. 804 cm2 c. 2,144 cm2 d. 201 cm2 2) Find the

28. ## economics

Why or when is a ppf curve biased?

29. ## Math

Why id gonzo walk around carrying ice cream and a pair os sparrows

30. ## Math algebra

David Robertson works as a chemical engineer for U.S. peroxide Corporation. David has 2500 gallons of commercial-grade hydrogen peroxide solution that is 60% pure hydrogen peroxide. How much distilled water(which is 0% hydrogen peroxide) will David need to

31. ## Social Studies

If an archeologist found an artifact near the Fourth Cataract, why might he or she have difficulty deciding how to display it in a museum?

32. ## math

How would I solve this; John is paid at an hourly rate of \$15 and over time rate of 1.5 times his hourly rate. If john puts in w regular hours and y overtime hours in a week, what is his total wage for the week? (Monday-Friday

34. ## physics

A team of dogs drags a 112 jk sled 2.23 km over a horizontal surface at a constant speed. The coefficient of friction between the sled and the snow is 0.181. The acceleration of gravity is 9.8 m/s. Find the work done by the dogs

35. ## english

Which word or phrase is an appositive in the sentence? When Sandy met John—a scientist and critic—she fell in love with him.

36. ## English

Why is it important that "The Story of an Hour" takes place in the nineteenth century? In the nineteenth century, women were not considered equal to men. *** The characters use nineteenth-century expressions that are hard to understand. *** Nowadays,

37. ## physics

Amy needs 5.0 V for some integrated circuit experiments. She uses a 7.0 V battery and two resistors to make a voltage divider. One resistor is 360 . She decides to make the other resistor smaller. What value should it have?

38. ## Calculus

A wire 17 inches long is cut into two pieces. One piece is bent to form a square and the other is bent to form a rectangle that is twice as wide as it is high. How should the wire be cut in order to minimize the total area of the square and rectangle?

39. ## English

1. Why does George try to prevent Lennie from playing with small animals? (1 point) He doesn't want Lennie to have a pet until he proves he can keep out of trouble. He is worried that Slim will be angry if Lennie plays with the puppies. He is embarrassed

40. ## trig

a ship leaves port with a bearing of S 42deg W after traveling 7 miles, the ship turns 90deg and travels on a bearing of N 52deg W for 10 miles at that time, what is the bearing of the ship to the port?

41. ## Trigonometry

Expressed in simplest form, (n-1/n)/(1+1/n) is equivalent to... 1.)n-1 2.)n+1 3.)n-1/n+1 4.)n

42. ## math

amy is 5 feet tall and casts a 4 foot shadow. the pine tree has an 8 foot shawdow. how tall is the pine tree

43. ## geometry

how do you solve m

44. ## english

Regarding the use of commas, which one of the following statements is accurate? A. A parenthetical use of commas is usually confusing to the reader. B. There is no need for commas that indicate added details in a sentence. C. Commas are needed to separate

45. ## physics

A certain car is capable of accelerating at a rate of 0.57 m/s^2.How long does it take for this car to go from a speed of 56 mi/h to a speed of 66 mi/h? 1mi/h = 0.447 m/s.Answer in units of s

46. ## probability

Please help me solve this problem step by step pleaseeee! The probability that an archer hits the target is p= 0.8, so the probability that he misses the target is q = 0.2. It is known that in this situation the probability that the archer hits the target

47. ## Chemistry

An 850 gram chunk of ice at 0 degrees Celsius is dropped into a container holding 1.7 kg of water at an initial temperature of 35 degrees Celsius. Due to the presence of the ice, the temperature of the water eventually drops to 0 degrees Celsius. Show a

48. ## Huckleberry Finn

Explain how the author created the character (characterization). Explain the theme of a piece of literature. Compare and contrast two pieces of literature. Write about one of the authors we have studied.

49. ## english

3. Which one of the following sentences best describes paraphrasing? A. Janette listened to the speaker and took notes. B. Janette listened to the speaker, asked questions, and wrote a report. C. Oscar studied Dr. Frost's article and summarized it in his

50. ## math

a right rectangular pyramid has base dimensions 7yd. by 5yd. and a height of 10yd. determine the surface area of the pyramid to the nearest square yard.

51. ## Chem

What is the product for the reaction of Ni(s) + 2Na^+(aq)? I don't think this is possible no?

52. ## geometry

If m || n and angle 5 is 32 degrees, what are the other angle measures?

53. ## Math3c

1.Find an A.P. such that the sum of the first three terms is one half the sum of the next four terms,the first term being 12. 2.In an A.P.,the sum of the first three terms is 18,and the sum of the squares of these terms is 126.Find the terms.

54. ## Math

Sally has a recipe that needs 1 1/2 tsp. of butter for every3 cups of milk. If Sally increases the amount of milk to 13 1/2 cups of milk, how many tsp. of butter are needed?

55. ## science

At exactly 2:00 pm, sophy the snail crawls onto a meter stick at the 10 cm mark. If he reaches the 65 cm mark at exactly 2:10 pm, what is her speed?

56. ## Calculus

A strong swimmer is one mile off shore at point P. Assume that he swims at the rate of 3 mile per hour and walk at the rate of 5 miles per hour. If he swims in a straight line from P to R and then walks from R to Q, how far should R be from Q in order that

57. ## physics

A body moving with uniform acceleration has a velocity of 10.2 cm/s when its x coordinate is 3.73 cm.If its x coordinate 2.33 s later is −2.74 cm,what is the x-component of its acceleration?Answer in units of cm/s^2

58. ## physics

What is the average velocity v between 0 s and 6 s?

59. ## chemistry

how to balance equations

60. ## physics

Consider the following set of equations, where s, s0 and r have units of length, t has units of time, v has units of velocity, g and a have units of acceleration. Take k to be dimensionless.Identify if these are dimensionally correct or incorrect. 1)v^2=

61. ## Consumer Math

Tommy borrowed \$600 at 9% for 12 months under a monthly installment plan. he must pay \$8.7453 per \$100 each month for 12 months. how much is his monthly installment payment?

62. ## Geometry

P->P'(-8,-3) for the glide reflection where the translation is (x,y)->(x,y-5) and the line reflection is x=-5. what are the coordinates of P? (-8,-8) (-8,2) (-2,-3) (-2,2)

63. ## Algebra

Use the Zero Product Property to solve the equation: -3m(2m – 5) = 0

64. ## Philosophy

What art the essential components of a logical argument? A logical argument is made up of the premise, the inference and the conclusion.The premise is the base in the structure of an argument. Within the boundaries of an argument, it isirriducible, that

65. ## Chemistry

What are the elements in Group A1 on the periodic table? alkali metals alkali earth metals inner transition metals ** halogens

66. ## Math Ms.Sue Help

Which data value has the highest frequency? A) 1/16 B) 3/16 C) 3/8 D) 5/8 A number line with four x's above one sixteenth, one x above three sixteenths, one x above three eighths, two x's above one half, two x's above five eighth, and one x above three

67. ## Algebra

I need help step by step please I keep getting a wrong answer of 252? Find the 24th term in the expansion of (a + b)^ 25

68. ## englis

8. Which of the following options accurately represents the steps involved in the writing process? A. Write first draft, edit, revise, write final draft B. Write first draft, revise, proofread, write final draft C. Plan, write first draft, edit, write

69. ## physics

The initial speed of a body is 2.14 m/s. What is its speed after 1.87 s if it accelerates uniformly at 4.31 m/s^2? Answer in units of m/s

70. ## Math

The coordinates of A and B are (7,-7) and (-2,2) respectively. If P and Q divide the line segment AB into 3 equal parts, find the coordinates of P and Q.

71. ## Algebra

Can anybody help me on this problem for my Algebra 2 class, I am having a hard time tyring to solve it step by step. The probability that an archer hits the target is p = 0.8, so the probability that he misses the target is q = 0.2. It is known that in

72. ## Algebra

Can anybody help me on this problem for my Algebra 2 class, I am having a hard time tyring to solve it step by step. The probability that an archer hits the target is p = 0.8, so the probability that he misses the target is q = 0.2. It is known that in

73. ## FRENCH

Comparez les deux dessins. Puis posez les questions suivantes a votre partenaire. Voire partenaire repond avec ne...jamais.., ne... plus, ne....personne ou ne...rien. Suivez le modele. There are pictures. One for 13h00 and one for 23h00. In the 13h00 one,

74. ## Chemistry

How do I separate a mixture of liquids?

75. ## history

what was the assassination of the Ferdinand-?

76. ## Math

Could someone show me how you would do the following question. Determine the roots algebraically by factoring: x^3 - 8x^2 - 3x + 90= 0

77. ## physics

To estimate how high the cliff is you throw a rock off the edge and 7.8 s later you hear the rock hit the ground. The speed of sound is 330 m/s. Ignoring air resistance how high is the cliff?

78. ## physics

What is its speed after 1.87 s if it accelerates uniformly at −4.31 m/s^2? Answer in units of m/s

79. ## math

Math homework help????? please? heres what it says on the paper. Using proportions, you can calculate the dimensions of objects without having to measure them. solve the problems that follow... heres the problem ===================================== amy is

80. ## history

3) what was the Roosevelt Corollary?

81. ## Chemistry

What is the molarity of HCL if it takes 16.5 mL of 0.100 M NaOH to titrate 10.0 mL of HCl? HCl + NaOH -> H2O + NaCl molarity = moles of solute/liters of solution

82. ## Chem

What will the products be for Ni(s) + 2Na^+(aq)? I don't think this is even possible, so will this reaction even be possible?

83. ## English!

This is what i got so far but i need help with an opening paragraph and conclusion Mark twain used huck as narrator to see the innocent view of these difficult adult themes. in the eyes of a child, the morality of the situations he finds are much more

84. ## Math

convert 628 kilometers to miles (round off ans to 2 decimal places)

85. ## Earth Science

Can you help me find how many hours are received by these degrees of latitude during the winter (see details)? North Pole = 0 hrs of daylight Equator = 12 hrs of daylight South Pole = 24 hrs of daylight 66.5 degrees north = ? 23.5 degrees north = ? 23.5

86. ## fallacies in philosophy

That's gotta be a great line of clothes. Have you seen the prices and the people endorsing it? Would this fallacy be non sequitur. Yes. http://en.wikipedia.org/wiki/Non_sequitur_%28logic%29 That's gotta be a great line of clothes. Have you seen the prices

87. ## Physics

Little Timmy falls down a well and hits the water 1.5s later. Determine the distance from the top of the well to the water below. Just an equation would be fine. Thanks in advance.

88. ## math

jim's 10-foot garage casts a 7-foot shadow. his house has a 17.5-foot shawdow. how tall is his house

89. ## FRENCH

I have a bit of information on Negative articles in french and stuff. Like I know there is Ne+ Pas Ne...Plus Ne...Rien Ne...Jamais Ne...Que Ne....Personne Ne Pas means: not, don't etc--a lot for this Ne plus means: not anymore, no more Ne Rien means:

90. ## FRENCH

Comparez les deux dessins. Puis posez les questions suivantes a votre partenaire. Voire partenaire repond avec ne...jamais.., ne... plus, ne....personne ou ne...rien. Suivez le modele. There are pictures. One for 13h00 and one for 23h00. In the 13h00 one,

91. ## Math

A runner takes 20 seconds to run 100 meters. How long to run 25 meters? (Ex. 25/100 = 20/?)

92. ## Math

What is a reciprocal A number's "flip". Like if you have 2/3, it's reciprocal would be 3/2. If you have a whole number like 5, for example, than it is understood that there is a 1 under the 5. (5/1) This means that the reciprocal of 5 is 1/5.

93. ## Math

Peter's lawn is 4800 square feet in area, and he mowed 1200 square feet of it. What fraction of his lawn still needs to be mowed?

94. ## Logs

log (sqrt4(x^16 / y^4)) What is the value of the expression when logx=8 and logy=1? My work: x=10^8 y=10 I tried to plug these in but my calculator but it said "overflow." Is there an easier way to do this?

95. ## physics

calculate the linear speed of a point on the record at the beginning and the end of the record that rotates at 33rev/min r1=7cm,r2=15cm

96. ## Chemistry

Weight of the Rock Salt Sample: .343 (g) Weight of the Rock Salt Solution: 9.910 (g) Trial #1 Trial #2 Trial #3 Weight of Rock Salt Solution Delivered (g) : .89 1.17 .786 Weight of AgNO3 Solution Delivered (g) : 1.53 .548 .786 Concentration of AgNO3 :

97. ## Physics

Starting from rest, Mr.M's bus achieves a velocity of 25 m/s in a distance of 1.0 km. Find the time and the acceleration. I don't know which formula to use. Delta T = Vf - Vi / Aavg ?

98. ## physics

What is the average acceleration a between 14 s and 16 s?

99. ## physics

Consider the expression 2π times square root of ℓ/g, where ℓ is length and g is gravitational acceleration in units of length divided by time squared.Evaluate its units.