# katrina

Popular questions and responses by katrina
1. ## Calc

If a rock is thrown upward on the planet Mars with a velocity of 17 m/s, its height (in meters) after t seconds is given by H = 17t − 1.86t^2. (a) Find the velocity of the rock after one second. (b) Find the velocity of the rock when t = a. (c) When will

2. ## precalculas

Let f(x) be the function 8x^2-5x+2 . Then the quotient [f(5+h)-(5)]/h can be simplified to ah+b for: a= b=

3. ## Math

The image below shows two dilated figures with lines KL and K’L’ drawn. If the smaller figure was dilated using a scale factor of 2, what relationship do lines KL and K’L’ have?

4. ## math

Part A: Max rented a motorbike at \$465 for 5 days. If he rents the same motorbike for a week, he has to pay a total rent of \$625. Write an equation in the standard form to represent the total rent (y) that Max has to pay for renting the motorbike for x

5. ## math

What is the force exerted by a catcher's glove on a 0.15-kg baseball moving at 35 m/s that is stopped in 0.02 s?

6. ## Calculus

In a chemical reaction, substance A combines with substance B to form subtance Y. At the start of the reaction, the quantity of A present is a grams, and the quantity of B present is b grams. Assume a is less than b. At time t seconds after the start of

7. ## food and Nutrition

Which protein is usually given the 'superior' names?

8. ## history

Which of the following best explains why trade among the colonies flourished? A)The different regions specialized in different crops. B)The colonies had developed large fleets of trading ships.** C)Existing trade routes were well-maintained by Native

9. ## U.s History

1.Which statement best describes an effect of William Penn's actions on colonial America? A)Cash-crop agriculture became more profitable in the Southern colonies. B)Many immigrants came to the Middle colonies seeking religious freedom.*** C)Several

10. ## I NEED HELP WITH THIS. PLZ

Lesson 2:3-D Views Unit 2: Measurement Multiple Choice For questions 1-3, use the following model. 1. How many cubes are in the base of the model? (1 point) A. 3 B. 4 C. 7 D. 2 2.How many cubes would be shown in the right view of the model? (1 point) A. 3

11. ## precalculas

The doubling period of a baterial population is 20 minutes. At time t=100 minutes, the baterial population was 80000. What was the initial population at time t=0? Find the size of the baterial population after 4 hours.

12. ## Science

What describes the current model of the atom? A)That electrons and protons move randomly around a nucleus. B)Electrons travel as waves in the electron cloud that surrounds the nucleus. C)Electrons orbit the nucleus like planets orbit the sun. D)Protons

13. ## (Math) PLZ CHECK ANSWERS

1. Which number is a solution of the inequality? 10.68 A)-5 B)-6 C)6 D)7*** 3. Which number is a solution of the inequality? 6>z(10-z) A)0 B)1 C)2 D)3*** 4. What are all the subsets of the set? {-1,9} A) 0, {-1}, {9}*** B) {-1}, {9}, {-1, 9} C) 0, {-1},

Consider a window the shape of which is a rectangle of height h surmounted a triangle having a height T that is 1.3 times the width w of the rectangle. If the cross-sectional area is A, determine the dimensions of the window which minimize the perimeter.

15. ## physics

a stone is dropped vertically into a lake which one of the following statements best describes the motion of the stone at the instant it enters the water?a)Its velocity and acceleration are both downwards b)It has an upwards velocity and a downward

16. ## math

how do I use multiplication and the Distributive property to find the quotient of 108/6

17. ## algebra

An inequality is shown below: −np − 3 ≥ 7(c − 4) Which of the following solves for n? n ≤ − the quantity 7 times c minus 31 all over p n ≤ − the quantity 7 times c minus 25 all over p---my choice n ≥ − the quantity 7 times c minus 31

Which of the following expressions is equal to log (x sqrt-y)/z^5 A. log x + log (1/2) + log y– log 5 – log z B. log [x + (1/2)y – 5z] C. log x + (1/2)log y – 5 log z d. [(1/2) log x log y]/(5 log z)

19. ## Art

The cinematographer works with what other professional to plan how each scene will be filmed and lit? A) Production Designer*** B) Director C) Graphic Artist D) Screen Writer Thank you!!! :)

20. ## Music

1. How is the survival of indigenous music and culture related to the challenges of modernization and environmental degradation?

21. ## U.S History

What did the Alien and Sedition Acts represent? A)Thomas Jefferson's concern with national defense B)James Madison's concern with personal freedom C)The importance of immigration to the Democratic-Republicans*** D)The importance of national security to the

22. ## Physics

Sue and Jenny kick a soccer ball at exactly the same time. Sue’s foot exerts a force of 49.9 N to the north. Jenny’s foot exerts a force of 119.7 N to the east. a) What is the magnitude of the resultant force on the ball? Answer in units of N b) What

23. ## ece

A preschool child can be designated a reader when he or she: a. writes words b. sounds out a word and is almost correct c. has both phonemic and phonological awareness d. understands and/or acts appropriately when looking at a written word

Consider a window the shape of which is a rectangle of height h surmounted a triangle having a height T that is 1.3 times the width w of the rectangle. If the cross-sectional area is A, determine the dimensions of the window which minimize the perimeter.

25. ## Organic Chemistry

How do I draw the condensed formula for: 1. 2,3-dimethyl-2-butene 2. 4-ethyl-2-hexyne 3. 3,3,6-trimathylnonane 4. 3-ethyl-4-propylheptane 5. 3-octanol

26. ## physics

i don't understand the projectile motion...my teacher said...it's a motion of a body confined to a vertical plane, perpendicular to Earth's surface... I don't get it, can anyone explain to me clearly???? plzzzzz....THX!!!! If your teacher said that, she

27. ## PHYSICS helppppp

a horizontal wire is stretched between two vertical poles. when a 12.0-N weight is suspended at its center, the wire sags until the angle between its halves is 110 degrees. what are the forces exerted by each half of the wire in supporting the weight? i

28. ## history

1.What event led to the U.S. purchase of the Louisiana Territory? A)The burning of a U.S. Navy ship in the First Barbary War B)The U.S. Supreme Court's decision in Marbury vs. Madison C)The successful Haitian slave revolt **D)Napoleon losing money in his

29. ## U.S History

Case Study: General Andrew Jackson: Andrew Jackson's military career spanned several wars including the American Revolution, the Creek War, the War of 1812, and the First Seminole War. After the Creek War, Jackson and the Creek Indians signed the Treaty of

30. ## U.S History

1.Use the passage to answer the following question: So through the night rode Paul Revere; And so through the night went his cry of alarm To every Middlesex village and farm, A cry of defiance, and not of fear, A voice in the darkness, a knock at the door,

31. ## Social Studies

Refer back to the text about the benefits of agriculture for ancient Egyptians. List three benefits. Write advertising slogans to promote agriculture to ancient Egyptians. Use your slogans to make a presentation about one or more benefits. Brainstorm one

32. ## Math

5.23 x 44 rounded to its greatest place value

33. ## biology

Both of the following processes represent what? A. A baker using yeast to make dough rise. B. Inserting human insulin genes into bacteria to make insulin for diabetics. biotechnology transgenic organisms genetic engineering all of the above

34. ## English

I really need someone to check my answers and I don't want to get the answers wrong. Cross out any prepositional phrases. Underline the verb/verb phrase twice. 1.) John walked along the trail during the summer. Subject:John Verb:walked Phrase:along the

35. ## chemistry

a balloon is filled with 15 L of an ideal gas of 20C. at this temperature the pressure of the gas is 1520 mm Hg. Suppose that the volume of the gas is reduced to 5 L at 290 K. what is the new pressure of the gas in atmospheres?

36. ## physics

The system in the Figure is in equilibrium. A mass M1 = 226.0 kg hangs from the end of a uniform strut which is held at an angle è = 41.0° with respect to the horizontal. The cable supporting the strut is at angle á = 27.4° with respect to the

37. ## Physics

You are the juror of a case involving a drunken driver whose 972 kg sports car ran into a stationary 2094 kg station wagon stopped at a red traffic light. The cars stuck together and slid with locked wheels for 11.0 m before coming to rest. The coefficient

38. ## physics

why and how does the blowing snow charge the fences?

39. ## math

dave delivered 52 newspapers in all.saturday and sunday.he delivered 8 more newspapers on sunday than on saturday.how many newspapers did dave deliver on sunday.

40. ## math

The equation y = 400(1.03)x is an example of

41. ## Calculus

In a chemical reaction, substance A combines with substance B to form subtance Y. At the start of the reaction, the quantity of A present is a grams, and the quantity of B present is b grams. Assume a is less than b. At time t seconds after the start of

42. ## Calculus

In a chemical reaction, substance A combines with substance B to form subtance Y. At the start of the reaction, the quantity of A present is a grams, and the quantity of B present is b grams. Assume a is less than b. At time t seconds after the start of

43. ## Calculus

In a chemical reaction, substance A combines with substance B to form subtance Y. At the start of the reaction, the quantity of A present is a grams, and the quantity of B present is b grams. Assume a is less than b. At time t seconds after the start of

44. ## math

a) how many tens are in 1000? b) how many hundreds are in 6000? c) how many thousands are in 2 000 000?

45. ## Chemistry

How would you approach a question like There are 6.02x 10 to the power of 23 atoms in one mol of atoms, how many atoms are there in 5.5 mol of atoms?

46. ## SENTENCE STRUCTURE

"The data indicate that 40 percent of the land that Israel plans to keep in any future deal with the Palestinians is private." Which kind of sentences is it?simple?complex?compound?complex compound? How can I define the part of speechs of each word in this

47. ## physics

a horizontal wire is stretched between two vertical poles. when a 12.0-N weight is suspended at its center, the wire sags until the angle between its halves is 110 degrees. what are the forces exerted by each half of the wire in supporting the weight? i

48. ## physics

extrapolation is the process whereby we extend an established numerical relationship between two variables beyond the limits of our observed and recorded data. why extrapolation would not be useful and wise to use in force-elongation graph? In

49. ## Physics

when we do convertions, do we have follow the rules for rounding? is it 118.5cm=1.19m, or 118.5cm=1.18m? It depends upon how many significant figures (sf) you are allowed, whether you are doing converSions or calculating some other problem. By definition,

50. ## Physics Measurement

Upon what is the precision of a measurement based? It depends upon what is being measured. For volume, the precision depends upon how precisely the buret or graduated cylinder can be read. For mass it depends upon the balance used (triple beam vs

51. ## HELP!!!!EMERGENCY WITH THE POEM!!!

do anyone knows a poem named "Instruction for Joining a New Society", which about the desire to become an American? I need this poem immediately!!! Thank you for using the Jiskha Homework Help Forum. If that is the title, I find nothing! If you have either

52. ## trigonometric functions

im compeletely lost with the trigonometric functions...can anyone explain clearly to me? Are you lost on the definitions?...where is the problem. You need to be able to draw and label all the parts of a triangle, the hypotenuse and legs. Then be able to

53. ## English

I have to use the word fretish as a noun, adjective and a verb. How am I suppose to do that?

54. ## Math

Which shape doesn't have two pairs of parallel sides? A. Parallelogram B. Trapezoid C. Rhombus D. Square

55. ## math

Geoff planted dahlias in his garden. Dahlias have bullbs that dvide and reproduce underground. in the first year, geoff's garden produced 4 bulbs. in the second year it produced 8 bulbs and in the third year it produced 16 bulbs. if this pattern continues

56. ## Geometry

Show that triangle ABC is a right triangle. point A: (-7,-2) point B: (-3,-3) point C: (-4,-7) I really don't know how to do this, please help.

57. ## Math

Find the percent of increase or decrease. 1. The price of ratio genius for \$40-\$44

58. ## Math

What is the equation of the line that passes through the points (−2, 1) and (1, 10)? 3x − y = −7----my answer 3x − y = −5 3x − y = 5 x + 3y = −5

59. ## math

What is the equation of the line that passes through the points (−2, 1) and (1, 10)? 3x − y = −7 3x − y = −5 3x − y = 5 x + 3y = −5

1. Which type of metal did Rutherford shoot alpha particles into? A)Copper B)Zinc C)Gold D)Platinum 2.When Thomson held a positively charged plate near the cathode ray, the beam bent toward the plate. What conclusion can be drawn from this observation?

61. ## science

1. Which type of metal did Rutherford shoot alpha particles into? A)Copper B)Zinc C)Gold D)Platinum 2.When Thomson held a positively charged plate near the cathode ray, the beam bent toward the plate. What conclusion can be drawn from this observation?

62. ## Math

Rationalize each dominator and simplify. All variables represent positive numbers. 10 / 5-√5 I tried but I couldn't get the answer right.

63. ## science double check answers

1.Asteroids in our solar system are a)planets b)comet remains c)found in an asteroid belt** d)pieces of ice 2.Which of the following would not be found on the electromagnetic spectrum? A)The wavelengths of electromagnetic radiation B)The frequency of

64. ## U.S History

Which of the following offers the best definition of the phrase "headright system"? A)Settlers were given land and, in return, were expected to farm and build on it.*** B)Settlers were given money if they agreed to sell a portion of their crops to Britain.

65. ## science double check answers

1. What is the alignment of the Earth, moon, and sun during a lunar eclipse? A)Earth, sun, moon B)Earth, moon, sun C)Sun, Earth, moon** D)Sun, moon, Earth I know that for a lunar eclipse the earth is in the middle, so i just wanted to double check 2.A

66. ## Science

1.When the effects of the moon and sun work together, this is what kind of tide? A)Neap tide B)Fall tide C)Spring tide** D)New moon tide

67. ## science

1. What is the alignment of the Earth, moon, and sun during a lunar eclipse? A)Earth, sun, moon B)Earth, moon, sun C)Sun, Earth, moon** D)Sun, moon, Earth I know that for a lunar eclipse the earth is in the middle, so i just wanted to double check 2.A

68. ## science

1.A scientific law A)can have only one known exception B)can have any number of exceptions as long as we know about them ** C)might have many exceptions we don’t know about D)has no exceptions 2.Sunspots are A) solar storms that can interfere with

69. ## science

1.A scientific law A)can have only one known exception B)can have any number of exceptions as long as we know about them C)might have many exceptions we don’t know about D)has no exceptions*** 2.Sunspots are A) solar storms that can interfere with

70. ## science

I'm stuck on the following questions 1)The geocentric model of the universe states that the Earth is the center of the universe. This is an example of a A)scientific conclusion B)pseudoscience C)scientific law*** D)Scientific method Through process of

71. ## Math

A metal cylindrical cannister is 1' 3"long and has a diameter of 4 inches. What is the total surface area of the cylinder?

72. ## Chemistry

What is the name for the following coordination compound or ion? Na3[Cr (NH3) NO2 Cl3]

73. ## math

Two men and a woman are lined up to have their picture taken. If they are arranged at random, what is the probability that (A) the woman will be on the left in the picture? (B) the woman will be in the middle in the picture?

74. ## pharmacy tech

3. You receive an order for 30 mL of 3% boric acid solution. The pharmacy has in stock a 1% and 5% boric acid solution in stock

75. ## Math

What is 503,000,000 as a percentage? I am doing this for a school project. It's really difficult to figure out. Just saying.

76. ## Math

What is 503,000,000 as a percentage?

77. ## English

I really need someone to check my answers so please check. 1.) Hurry down the hall for your next meeting. Phrase: down the hall for your next meeting Verb: hurry Subject:(you)

Write two possible quartic inequalities, one using the less than or equal to symbol (≤) and the other using the greater than or equal to symbol (≥), that correspond to the following solution : -6-√2

79. ## Chemistry

1) How would you expect the solubility of the following to vary n a series of solutions of increasing ionic strength created by adding KNO3 a) ammonia b) ammonium chloride 2) If the ionic strength was increased by adding KCl, the solubility of which one of

80. ## math

Anita has 2 sisters and 3 brothers. The mean of all their ages is 6yrs.What will their mean age be 10yrs from now?20 yrs from now?

81. ## statistics

A student of the author surveyed her friends and found that among 20 males, 4 smoke and among 30 female friends, 6 smoke. Give two reasons why these results should not be used for a hypothesis test of the claim that the proportions of male smokers and

82. ## Sociology

In the U.S., which social class has benefitted the most from the tax breaks?

83. ## Bio

A biologist measured the amount of DNA in several single diploid cells taken from a culture. He knew that these cells could divide mitotically, but not meiotically. His data is shown below: Cell Number and DNA content in micrograms: Cell 1 (11.1

84. ## culturally diverse

Young children's functional use of language within a work context is often observed in... a. mainstream industrialized societies b. triadic interactions in Mexico-American group c. rural Appalachian Black communities d, Native American cultures

85. ## math

Fantasia Florist Shop purchases an order of imported roses with a list price of \$2,375 less trade discounts of 15/20/20. What is the dollar amount of the trade discount? (Points : 2.5)

86. ## math

What is the force exerted by a catcher's glove on a 0.15-kg baseball moving at 35 m/s that is stopped in 0.02 s?

87. ## Physics

A man is pulling on a rope with a force of 86 N directed at an angle of 64◦ to the horizontal. What is the x-component of this force? Answer in units of N What is the y-component of this force? Answer in units of N

88. ## algebra 2

simplify the expression -5+i/2i

89. ## Math

1.Describe the effects on the graphs y = sin k0(0 is theta) and y = cos k(0 is theta) as the value of k vaires.

how did athens become rich?

91. ## math

In a particular small town, the population in 1995 was 1200. Ever since then the population has grown by 4% every year. If conditions stay the same, what is the approximate expected population in the year 2000?

92. ## math

Rewrite using only positive exponents: x−5y3 how do you rewrite without negative exponents?

93. ## chemistry

Week 5, Day 4, respond to the problem statement assigned to you for this week. At a prominent state hospital, a 45-year-old woman is receiving a ‘combined modality' treatment for the initial stage of breast cancer. State the two aspects included in this

94. ## algebra

Rewrite with positive exponents. Assume that even roots are of nonnegative quantities and that all denominators are nonzero. (2x^2y-^1)^-6

95. ## statistics

From the Arizona Department of Weights and Measures: Among 31 inspections sat a NAPA Auto Parts store, 88% failed. X= ?

96. ## physics

A six kilogram object undergoes an acceleration of 2.0 meters per second squared. Part a. What is magnitude of the net force acting on the object? Part B. If the same force is applied to a 4 kilogram object what acceleration is produced?

97. ## math

(7+9)+3= 1+(9+5)=

98. ## Calculus

Find all points at which the graph of f (x) = x^3 −3x has horizontal tangent lines.

99. ## Chemistry

I need help writting a formula for: AgNO3(l) + PbNO3(l) + HgNO3(l) + HCl (l)