# kendra

Most popular questions and responses by kendra
1. ## Math help and check

Which kind of function best models the set of data points (–1, 22), (0, 6), (1, –10), (2, –26), and (3, –42)? linear **** quadratic exponential none of the above 2. Which kind of function best models the set of data points (–3, 18), (–2, 6),

2. ## English

8. What can readers infer from the following quote from Act V, Scene 3 of Romeo and Juliet? Romeo: O, be gone! By heaven, I love thee better than myself; For I come hither arm’d against myself: Stay not, be gone;--live, and hereafter say, A madman’s

1. Solve the system of equations y=2x^2-3 y=3x-1 a)no solution b)(-1/2,5),(2,-5/2) c)(-1/2,-5/2),(2,5)**** d)(1/2,5/2),(2,5) 2. How many real number solutions are there to the equation 0=-3x^2+x-4? a)0 ***** b)1 c)2 d)3 3.solve the equation by completing

4. ## Chemistry

In the experiment Nitration of Methyl Benzoate why is it important to add the nitric acid-sulfuric acid mixture slowly over a 15 minute period?

5. ## Math

The price of a stock, A(x), over a 12-month period decreased and then increased according to the question A(x)= 0.75x2-6x+20, where x equals the number of months. The price of another stock, B(x), increased according to the equation B(x)=2.75x+1.50 over

6. ## math-algebra 2

What are the solutions of the quadratic equation? 2x2 – 16x + 32 = 0

7. ## Literature

PART A: What is Asimov's main idea in this essay? (Science an the sense of wonder) A- space is best appreciated through poetry B- poetry and science can work together****** C- the universe is more than beauty D- scientific knowledge is always advancing

8. ## General Chemistry

Cinnamic alcohol is used mainly in perfurmery, particularly in soaps and cosmetics. Its molecular formula is C9H10O. a. Calculate the percent composition by masss of C, H, and O in cinnamic alcohol. b. How many molecules of cinnamic alchol, not acid ,are

9. ## Psychics

A freight car is moving freely along a railroad track at 7.0 m/s and collides with a tanker car that is at rest. After the collision, the two cars stick together and continue to move down the track. What is the magnitude of the final velocity of the cars

10. ## General Chemistry

PLEASE ANSWER VERY SOON I AM STUCK! Crystalline silicon has a cubic structure. The unit cell edge length is 543 pm. The density of the solid is 2.33 g/cm3. Calculate the number of Si atoms in one unit cell.

11. ## physics

According to Newton's version of Kepler's third law, how would the ratio T^2/r^3 change if the mass of the Sun were doubled?

12. ## Genera Chemistry

Nitric oxide (NO) reacts with oxygen gas to form nitrogen dioxide (NO2), a dark-brown gas: 2NO(g) + O2(g) -> 2NO2(g) In one experiment 0.886 moles of NO is mixed with 0.503 moles of O2. Calculate which of the two reactants is the limiting reagent. Please

13. ## Math

Round to the nearest hundredths 23.456

14. ## English

I need a theme statement about discrimination

15. ## Physics

In a popular amusement park ride, a cylinder of radius 2.19 meters is set in rotation at an angular speed of 5.09 rad/s. The floor then drops away, leaving the riders suspended against the wall in a vertical position. What minimum coefficient of friction

16. ## math

Sam received a \$290 discount loan to purchase a stereo. The loan was offered at 16% for 90 days. Find the interest in dollars and the proceeds for the following problem. The interest is \$12.60, \$11.60, or \$10.60 ? The proceeds are \$279.40, \$278.40, or

17. ## chemistry

please explain why the gem-dimethyl groups appear as separate peaks in the proton NMR spectrum of isoborneol although they almost overlap in borneol

18. ## word problem Math

A pollster interviewed 500 university seniors who owned credit cards. She reported that 240 had Goldcard, 290 had Supercard, and 270 had Thriftcard. Of those seniors, the report said that: 80 owned only a Goldcard and a Supercard, 70 owned only a Goldcard

19. ## Physics

What hanging mass will stretch a 1.9-m-long, 0.54 - diameter steel wire by 1.2 ?

20. ## chemistry

How many grams of calcium carbonate are required to prepare 50.0 grams of calcium oxide? CaCO3-> CaO + CO2

21. ## UncG

A 1300 kg sports car accelerates from rest to 90 km/h in 7.4 s. What is the average power delivered by the engine?

22. ## chemistry

Assuming all volume measurements are made at the same temperature and pressure, how many liters of oxygen gas would it take to react completely with 7.25 liters of hydrogen gas? Show all of the steps taken to solve this problem. Unbalanced equation: H2 (g)

23. ## Physics

A 437.7 N child and a 237.1 N child sit on either end of a 2.5 meter long seesaw. How far from the 437.7 N child should the pivot be placed to ensure rotational equilibrium? disregard the mass of the seesaw. answer in units of m.

24. ## Chemistry

it takes 37.50 mL of 0.152 M sodium chromate to titrate 25.00 mL of silver nitrate. what is the molarity of the silver nitrate solution

A wooden raft 3 m long x 2 m wide x 20 cm thick floats on a freshwater lake. A) Determine the buoyant force? B) If the raft itself has a mass of 600 kg, how many 65-kg people could it support?

26. ## Statistics

4. The Graduate Record Exam (GRE) has a combined verbal and quantitative mean of 1000 and a standard deviation of 200. Scores range from 200 to 1600 and are approximately normally distributed. For each of the following problems: (a) draw a rough sketch,

27. ## Chemistry

what is the magnitude and sign of the molar heat of vaporization of butane

28. ## chemistry

Explain how the addition of a solute affects the vapor pressure of the solvent.

29. ## Spanish

Translate: Cuantos estudiantes hay en tu clase de espanol Translate:Que necesitopara mi clase de ingles? Thank you for using the Jiskha Homework Help Forum. I do not see that you even made an attempt! You learn much more when you try first! How many

30. ## Chemistry

why is it important to add the nitric acid-sulfuric acid mixture slowly over a 15 minute period?

31. ## Chemistry

Which of the following statements is (are) true? A. The vapor pressure of CO2 is lower than the vapor pressure of water. B. Sea water has a lower vapor pressure than distilled water. C. The vapor pressure of 1 m NaCl is higher than the vapor pressure of

32. ## algebra

Perform the indicated operation. x/2+y/3-z/4

33. ## chemistry

Use the collision theory to explain how increasing the surface area of a solute will increase the rate of the dissolving process.

34. ## chemistry

The boiling point of a solution will ______ and the vapor pressure will _______ with a(n)_____ in the amount of dissolved solute.

35. ## General Chemistry

Nitric oxide (NO) reacts with oxygen gas to form nitrogen dioxide (NO2), a dark-brown gas: 2NO(g) + O2(g) -> 2NO2(g) In one experiment 0.886 moles of NO is mixed with 0.503 moles of O2. Calculate which of the two reactants is the limiting reagent. Please

36. ## Art Appreciation

Compare Raphael's School of Athens with Veronese's Christ in the House of Levi. How did each work reflect the environments of Rome or Venice?

37. ## physics

during space flight, astronauts often refer to forces as multiples of the force of gravity on earth's surface. what does a force of 5g mean to an astronaut?

38. ## Calculus

Let f(t)=(1)/(t) Find a value of t such that the average rate of change of f(t) from 1 to t equals 14. t= ____

39. ## earth

Some people have proposed building a giant elevator from Earth's surface to geosynchronous orbit. The top of the elevator would then have the same orbital distance and period as any satellite in geosynchronous orbit. Suppose you were to let go of an object

40. ## physics

The engine of a toy rocket supplies an average acceleration of 38.0 m/s/s to the rocket for an interval of 0.80 s. A.)If the toy roocket is launched vertically, how high does it rise in this interval? B.) How fast is the rocket moving at the end of 0.80 s?

41. ## Math

Kendra has 5.5 pounds of popcorn and wants to package it equally in 50 bags. How can she use place-value reasoning to find the amount of popcorn to put in each bag?

42. ## College Algebra

An executive invests \$26,000, some at 8% and some at 6% annual interest. If he receives an annual return of \$1,800, how much is invested at each rate?

43. ## Psychics

Bradley, working in his 23 C kitchen, is cooking himself a crepe in an iron skillet that has a circular bottom with a diameter of .30 m. How hot must the skillet be in order for Bradley to make a 710.3 m^2 crepe that just fills the bottom of the pan?

44. ## chemistry

A sample of gas has increased in temperature from 20° Celsius to 22° Celsius. Which of the following happens as the temperature of the gas goes up? A.The gas undergoes a phase change. B. The velocity of the gas particles decreases. C.The kinetic energy

45. ## General Chemistry

Calculate the number of C atoms, H atoms, and O atoms, in 1.50 grams of glucose (C6H1206). I do not understand how to calculate this. Please explain and post the correct answers.

46. ## math

One day during flu season, 1/3 of the students in a class were out sick, and only 24 students were left. How many students are in the class?

47. ## social studies

Where can I find information on: "What products might we get from the seven major regions of the United States?" (Great Lakes, Mountain, Southwest, Northeast, Plains, Pacific, Southeast) This encyclopedia article discusses the regions of the U.S. The

48. ## Polynomials and quadratic application

I want to make a rectangular garden by fencing in a area on the back of my house. Three sides of the rectangle will be fencing; the fourth side will be the side of the house. I have 60 feet of fence. What dimensions should I make the rectangle so that I

49. ## math

mia gave 1/3 of her 24 marbles to david how many did david get?

50. ## us history

was the growth of democracy just a coincidence or did it contribute to the market revolution? i am trying to us this as a timeline.

51. ## Algebra

It is estimated that each cigarette a person smokes shortens that person's life by the amount of time she or he took to smoke it plus ten minutes. Write an algebraic rule that determines the number of minutes (t) a person's life is shortened by smoking c

52. ## General Chemistry

Cinnamic alcohol is used mainly in perfurmery, particularly in soaps and cosmetics. Its molecular formula is C9H10O. a. Calculate the percent composition by masss of C, H, and O in cinnamic alcohol. b. How many molecules of cinnamic alchol are contained in

53. ## General Chemistry

Calculate the number of C atoms, H atoms, and O atoms, in 1.50 grams of glucose (C6H1206).

54. ## Elementary Math for Educators

give three ways a student could find the product of 9x7 if she had not memorized this fact.

55. ## Us history

the sugar act was a new tax on molasses but actually lowered an earlier text what were the colonists doing in response to the earlier text that the sugar act try to stop? A.) Declaring independence from Britain B.) Paying only a portion of it C.) Holding

56. ## math

Mia gave 1/3 of her 24 marbles to david. How many did david get?

57. ## Physics

On a distant planet, golf is just as popular as it is on earth. A golfer tees off and drives the ball 4.3 times as far as he would have on earth, given the same initial velocities on both planets. The ball is launched at a speed of 40 m/s at an angle of

58. ## Chemistry

A buffer solution is prepared by dissolving 0.400 mol of CH3COOH and 0.200 mol of CH3COONa in 1.00 L of water. 1.00 mL of 10.0 M HCl is added to a 100 mL portion of this solution. What is the final pH of the resulting solution? Ka of CH3COOH = 1.8 x 10¯5

59. ## digital arts

sculpture is an example of preforming art true false**

60. ## Chemistry

When mixing 10m/L of 6 M HCl (diluted with 10 mL of water) with 0.1 g of Mg, how many moles of H2 are created and how many moles of Mg are reactant? I understand I must use n=(PV)/(RT) to find H2, since it is a gas, but the constant R is still confusing to

61. ## physics

Calculate the potential energy of a 9.00 g bullet traveling 4.00 m above the ground at 50.0 m/s with respect to the ground

62. ## goverment

America’s founders envisioned a _________________________ that was closer to the government of ancient Athens than to the political system found in America today

63. ## chemistry

N2+2H2=N2H4 What is the concentration of H2 at equalibrium when (N2)=.033 and (N2H2)= .042 M? Keq=5.29

64. ## calculus

use differentials to approximate the value of the squareroot of 4.3

65. ## Algebra

The sum of two numbers is 68 and the difference is 10. What are the numbers?

66. ## math

two-fifths of the voters already prefer candidate x. if he took money from a political action committee to buy television time, a third of those who do not now prefer him would be convinced to vote for him. But he would los the support of a fifth of those

67. ## Algebra Help

It is estimated that each cigarette a person smokes shortens that person's life by the amount of time she or he took to smoke it plus ten minutes. Write an algebraic rule that determines the number of minutes (t) a person's life is shortened by smoking c

68. ## English

1)In what ways are the societies described in "The Children of Men" and "Brave New World" dystopias? 2)For what common reasons do the characters of "The Children of Men" and "Brave New World" rebel against their respective societal values?

69. ## science

describe how carbon dioxide is managed by the rbc from the tissue

70. ## algebra 1

how do you even start to begin how to slope in standard form and slope intercept and point slope cuz i have a test tomrrow on it Although it might be too late for your test, I searched Google under the key words "slope" to get these possible sources:

71. ## Math

There are 40 yellow and blue marbles in a bag. There are 4 times as many blue marbles as yellow marbles. How many yellow marbles are there? 5 How many blue marbles are there? 35

72. ## Statistics

The grades in the final exam of a random sample of 25 students produce a standard deviation, s = 9.5. a) Construct a 90% confidence interval estimate for the population variance, . b) Can we infer at 10% level of significance that the population variance

73. ## Math

What is the amount of interest on the loan? \$ b. What is the maturity value of the loan? \$ c. What is the maturity date of the loan? Enter the full name of the month.

74. ## CHEMISTRY Homework Assignment

Hi I noticed someone else put this question up, but I am having a hard time with this one. I HAVE NO IDEA WHAT TO DO. What will be the products of the electrolysis of an aqueous solution of zirconium iodide (ZrI4)? (The electrodes themselves are platinum.)

75. ## Englishh

if my quote is exactly 4 lines do i have to indent it using MLA formatting an citations

76. ## chemistry

31.0mL sample of LiOH, concentration unknown, is titrated with .52 M HCl. It takes 42.9 ml of HCl to reach the endpoint. What is the concentration of the base?

77. ## math

show that the sum of four consecutive whole numbers is divisible by 2

78. ## Physics

On a spacecraft two engines fire for a time of 560 s. One gives the craft an acceleration in the x direction of ax = 5.10 m/s2, while the other produces an acceleration in the y direction of ay = 7.30 m/s2. At the end of the firing period, the craft has

79. ## Algebra

If 10,000 is invested at 4.8% simple interest, how long will it take for the account balance to grow to 11,200.

80. ## Physics

A con of soda displaces 3.79 * 10^-4 m^3 of water when completely submerged. Each 0.018 kg can contains 3.54 * 10^-4 m^3. Compare the buoyant force on a can of diet soda of density 1001 kg/m^3 to the force on a can of regular soda of density 1060 kg/m^3.

81. ## Algebra Help

Write the equation of a perpendicular bisector of the segment joining the points: (7,2) and (3,0). Okay, so I don't even know what a bisector is. Is there a formula for this or something? If some could someone tell me it. Or tell me the process.

82. ## General Chemistry

3.71 When potassium cyanide (KCN) reacts with acids, a deadly poisonous gas, hydrogen cyanide (HCN), is given off. Here is the equation: KCN(aq) + HCl(aq) -> KCl(aq) + HCN(g) If a sample of 0.140 grams of KCN is treated with an excess of HCl, calculate the

83. ## math

in order to achieve from aerobic exercise, one should maintain one's heart rate at a certain level. A fourty year old women with a reating heart beat of 80 beats per minue should keep her heart rate between 140 and 160 beats per minute while exercising.

84. ## Medical Terminology

devise memory aids for any five terms relating to the musculoskeletal system

85. ## spanish

the daughter of sister is my

86. ## algebra 2

the sum of 3 consecutive intergers is 90. find the largest interger if x is the smallest interger

87. ## Polynomials and quadratic application

Suppose I want a garden with 400 square feet. Write an equation that can be used to find the values for x that will result in that area.

88. ## chemistry

0.82g of an unknown gass is at 30 degrees C in 3L container at a pressure of 15.9psi. What is the molecular weight of the unknown gas?

89. ## College Personal Finance

Annual interest of 6.0% paid if balance exceeds \$900, \$12 monthly fee if account falls below minimum balance, average monthly balance \$1,135, account falls below \$900 during 2 months. Round the answer to the nearest cent.

90. ## US HISTORY

WHAT ARE EVENTS THAT INFLUENCED THE SECTIONAL CRISIS THAT LED TO CIVIL WAR?

91. ## US HISTORY

Why was there tension in slavery in the 1840's

92. ## English-lord of the flies

Give five present day examples of similar characteristics or situations present in the novel lord of the flies.

93. ## Inequalities

Shelby's test scores are 99, 91, and 85. If she must average at least 90 points to get an A in the class, what must she earn on the next test? Okay so this was my equation but it came out completely wrong. 99+91+85+x greater than or equal to 90 So what

94. ## Math

Okay, I just need the steps for simplifying this type of radical: 5 -- 3√2 thats all one problem. thanks!

95. ## Algebra Help

Okay, I just need the steps for simplifying this type of radical: 5 -- 3√2 thats all one problem. thanks!

96. ## Genera Chemistry

Balance the following equations: a. C + O2 CO b. CO + O2 CO2 c. H2 + Br2 HBr d. K + H2O KOH + H2 e. Mg + O2 MgO please explain and show work.

97. ## critical thinking

what is thinking

98. ## physics

Newton assumed that a gravitational force acts directly between Earth and the Moon. How does Einstein's view of the attractive force between the two bodies differ from Newton's view?

99. ## home economics

Can the snack itself be attractive?