# jenna

Popular questions and responses by jenna
1. ## math

a company employs 12 gardeners at $26 per day , and 8 clerks at$17 per day. What is the mean daily wage,in dollars,of the 20 employees?

2. ## physics

Dispersion in a window pane. In the figure on the left, a beam of white light is incident at angle θ = 51° on a common window pane (shown in cross section). For the pane's type of glass, the index of refraction for visible light ranges from 1.528 at the

3. ## Chemistry

How many electrons and how many protons are in the ion Cr6+?

4. ## Science

1. Which of the following is an example of matter? (1 point) leaves shadows light from the sun sound 2. Which of the following is an example of a chemical property of matter? (1 point) ability to melt ability to freeze ability to react ability to break 3.

5. ## physics

A person standing on a vertical cliff a height h above the lake wants to jump into the lake but notices a rock just at the surface level with its furthest edge a distance s from the shore .The person realizes that with a running start it will be possible

6. ## math

How many paths spell STATISTICS using Pascal's triangle? S T T A A A T T T T I I I S S T I I C C C S S Thanks in advance

7. ## Math

What is the fewest number of 7's that can be added together to make their sum greater than 4000? A) 4001 B) 572 C) 571 D) 470

8. ## statistics

The Information Systems Audit and Control Association surveyed office workers to learn about the anticipated usage of office computers for personal holiday shopping. Assume that the number of hours a worker spends doing holiday shopping on an office

A submarine is travelling parallel to the surface of the ocean at a depth of 626m. It begins a constant ascent in order to reach the surface after travelling a distance of 4420m. The ascent takes 35mins. A.) what angle of ascent or angle of elevation would

10. ## Business Consulting, Intro to Computers

• Bill wants the entry in Column G to remind him of expenses that require receipts for the accountant. Tell Bill what to put in Column G to do this: a. Print the word “Yes” in any row where the total daily expenses are greater than or equal to

11. ## Math

A 40-foot by 10-foot rectangular garden is enclosed by a fence. To make the garden larger, while using the same amount of fencing, its shape is changed to a square. How many square feet larger than the old garden is the new garden?

12. ## math

Max, James, and Brett were playing basketball. One of them broke a window, and the other two saw him break it. Max said, "I am innocent." Jamess said, "Max and I are innocent." Brett said, "Max and James are both innocent." If only one of them is telling

13. ## trigonometry

given v=5i+3j and w=-4i+8j, find projwv

14. ## Math

A turtle is at the bottom of a 12 foot well. Each day it crawls up 3 feet, but each night it slips back 2 feet. After how many days will the turtle reach the top of the well? ANSWER: The turtle will reach the top of the well after [ ] days... Thanks

15. ## science

name a chemical sometimes used to make the specimen visible on a microscope. answer needs to be 5 leters stain thank you tell me an example of solidification.. please :) When water, a liquid, freezes to a solid, ice. Also called crystallization. stage

16. ## Physics

Hi, A squash ball of mass 0.035 kg hits the wall at speed of 78 m/s and rebounds straight back at 61 m/s. The ball is in contact with the wall for 0.44 s. a) What is the original momentum of the squash ball? 2.73 kg-m/s b) Calculate the impulse imparted to

17. ## physic angular momentum and torque

Calculate the mass m needed in order to suspend the leg shown in the figure(Figure 1) . Assume the leg (with cast) has a mass of 15.5kg , and its CG is 35.5cm from the hip joint; the sling is 76.5cm from the hip joint.

18. ## Math

A rectangular table is twice as long as it is wide. What is the perimeter of a table if it measures 1.5ft by 3ft ?

19. ## math

in the town hall meeting room, i sit in the fourth row from the front, whcih is also the twelfth row from the back. each row has 14 seats. how many people can be seated in the meeting room? is it 14*15 ?

20. ## Physics

A 50.0 g bullet strikes a 7.00 kg stationary wooden block. If the bullet becomes embedded in the block, and the block with the embedded bullet moves off at a velocity of 5.00 m/s, what was the initial velocity of the bullet?

21. ## College Physics (repost)

A 4.1 kg block is attached to a spring with a force constant of 550 N/m , as shown in the figure. Find the work done by the spring on the block as the block moves from A to B along paths 1 and 2. W=? How do your results depend on the mass of the block?

22. ## History

What does the phrase "without transcending its authority" suggest about Jackson? Jackson is concerned about abusing the power he has been given. Jackson wants to unite the states but does not have enough control of Congress. Jackson feels the Congress has

23. ## math

A game is defined by the rules that two dice are rolled and the player wins varying amounts depending on the sum of the two dice rolled based on the following table: Sum 2 3 4 5 6 7 8 9 10 11 12 Winnings $10$9 $8$7 $6$5 $6$7 $8$9 $10 If it costs$7.50

24. ## algebra

Sara goes on a slingshot ride in an amusement park. She is strapped into a spherical ball that has a radius of centimeters. What is the volume of air in the spherical ball?

25. ## Math

In triangle ABC, the measure of angle A is 80 degrees and the measure of angle B is 50 degrees. If the length of AB is 2x - 12 and the length of AC is x - 3, what is the length of AB? A) 15 B) 12 C) 9 D) 6 E) 3

26. ## Math

How many pairs of parallel edges does a rectangular solid have?

27. ## Physics

The wheels, axle, and handles of a wheelbarrow weigh W = 65 N. The load chamber and its contents weigh WL = 538 N. The drawing shows these two forces in two different wheelbarrow designs. To support the wheelbarrow in equilibrium, the man’s hands apply a

28. ## ap chemistry

what volume of 0.0100 M NaOH must be added to 1.00 L of 0.0500 M HOCl to acheive a PH of 8.00?

29. ## Geometry

The midpoint of the segment joining points (a, b) and (j, k) is: (j-a,k-b) j-a over 2 k-b over 2 (j+a,k+b) j+a over 2 k+b over 2

30. ## chem

A chemist requires some 3-hexanone for a reaction, but only has some 3-hexene available. Explain using chemical reactions, how the 3-hexene could be converted to 3-hexanone. Include the conditions needed for each step. (You will need two steps).

31. ## AP Chemisty

N2(g)+3F2 yields 2Nf3(g) Delta H(degree)298=-264KJ mol-1;Delta S(degree)298=-278J K-1 mol-1 The following questions relate to the synthesis reaction represented by the chemical equation above. a.)CAlculate the value of the standard free energy change,

32. ## psychology

what is the premack principle? This will explain the principle for you. en.wikipedia.org/wiki/Premack_principle http://en.wikipedia.org/wiki/Premack_principle

33. ## Chemistry

The oxidation of iodide ions by arsenic acid in acidic aqueous solution occurs according to the net reaction H3AsO4 + 3I – + 2 H3O +→ H3AsO3 + I3– + H2O. The experimental rate law for this reaction is Rate = k [H3AsO4] [I–] [H3O+]. According to the

34. ## Calc

Use the limit process to find the area of the region between the graph of the function and the x-axis over the given interval. y = −4x + 6, [0, 1]

35. ## Spanish

Grammatically correct? Mi hermana es muy trabajadora? Correct

36. ## physics

A fly of mass .2 g sits 12 cm from the center of a phonograph record revolving 331.3 rpm. a)What is the magnitude of the centripetal force on the fly?b)What is the minimum value of the coefficient of static friction between the fly and the record required

37. ## Chemistry

Determine the molarity of a 15.0 % by mass Hydrogen Peroxide solution. The density of Hydrogen Peroxide is 1.054 g/mL. The 15.0% by mass can be broken apart into 15.0 g Hydrogen Peroxide and 100.0 g solution. Use the density of Hydrogen Peroxide solution

38. ## psychology

The first year after the speed limit was reduced to 55 mph was the first year since there was a federal speed limit that no one in the United States who was observing the speed limit died in an auto accident. What does this prove?

39. ## psychology

A friend of mine finished fourth in her age group in the world duathlon (run, ride, run). She has two bicycles that differ along several variables, but she isn’t sure which one will be best for the next season. How could she find out? Write the methods

40. ## Statistics

A brewery's filling machine is adjusted to fill bottles with a mean of 32.6 oz. of ale and a variance of 0.004. Periodically, a bottle is checked and the amount of ale noted. (a) Assuming the amount of fill is normally distributed, what is the probability

Objects on the moon's surface have an acceleration due to gravity one-sixth that on the earth's. What would the 40 kg boy weigh on the moon? (Round answer to nearest tenth.)

42. ## chemistry

if 30ml of .150 M CaCl2 is added to 22.5ml of .1 M AgNO3, what is the mass of the AgCl precipitate?

43. ## calc II

Express the integrals as the sum of partial fractions and evaluate the integral: (integral of) (x^2)dx/(x-1)(x^2 +2x+1) My work: The above integral is equal to x^2dx/(x+1)^2 (A/x-1) + (B/x+1) + (Cx+D)/(x+1)^2 = x^2 A(x+1)^2 + B(x-1)(x+1) + (Cx+d)(x-1) =

44. ## algebra

3+1/7x +5x=453/7

45. ## Calculus

I'm having trouble with the following problem: Find the volume of the solid generated by revolving the region about the given line. The region is in the first quadrant bounded above by the line y= sqrt 2, below by the curve y=secxtanx, and on the left by

46. ## grammar

Is the date "1901" a proper know?

47. ## psychology

Can someone give me an example or a classical conditioning and operant conditioning? The best-known example of classical conditioning was Pavlov's dog. In my own experience, I associate the smell of roses with funerals, probably because of an early

48. ## Algebra

A river is 2000 ft wide and flowing at 6 mph from north to south. A woman in a canoe starts on the eastern shore and heads west at her normal paddling speed of 2 mph. In what direction (measured from North) will she actually be traveling. How far

49. ## Kinematics

A car is travelling north on a highway at 25 m/s. Just as the car crosses a perpendicularly intersecting crossroad, the passenger throws out a can horizontally, towards the east. The initial speed of the can relative to the car is 10 m/s. It is released at

50. ## Calculus 1

(1 point) Write an expression for the function, f(x), with the properties. f′(x)=(ln(x)2)/x and f(3)=7. f(x)=∫t=b t=a

51. ## Calc

You plan to paint a sphere of radius 200 cm with a coat of pain .2 cm thick. Use differentials to approximate the amount of paint that is needed. Use the equation for the volume of a sphere.

52. ## Math

Where do I insert the grouping symbols for 8+12+16÷4 = 15

53. ## Math

To the nearest tenth, find the volume of a sphere with a diameter of 10 cm. Use 3.14 for Pi

54. ## Math

The finale score In a soccer game is 4-3. How many different scores were possible at half time?

55. ## Physics/trig

A fire hose ejects a stream of water at an angle of 33.6 ° above the horizontal. The water leaves the nozzle with a speed of 29.6 m/s. Assuming that the water behaves like a projectile, how far from a building should the fire hose be located to hit the

56. ## Math with business apps

Young and Company owes bond holders $5,500 interest at the end of each quarter for the next five years. How much must they deposit now at 8% interest compounded quarterly to yield an annuity payments of$5,500?

57. ## math

The school colors are blue and white. Elizabeth has 84 blue balloons and 96 white balloons. How many balloon bouquets can she make if she wants to haVe the same number of each color in each bouquet and use all balloons?

58. ## chemistry

3. Describe the subatomic structure of the nucleus of carbon-14, including the structure of each nucleon. Draw a picture. Describe the forces that hold the nucleus together and draw them on your diagram. Write the equation for the carbon-14 isotope decay

59. ## french

ce concert est tres ennuyeux

60. ## social studies

In 1846, the population of San Francisco, California, was only 200. By 1852, the city's population was 36,000. Which contributed the most to San Francisco's population change? (5 points) The Gold Rush The Mexican-American War The Monroe Doctrine The Trail

61. ## English writing a concluding paragraph

My essay is about conformity and rebellion. I need a really good conclusion. My intro is this: In life there will be certain situations in which we will have to stay in order or choose to make our decisions ourselves. For example there will be times when

62. ## English, check my answers

please check if I have put the apostrophes in the right places or if I have forgot to put them in certain places in these sentences: 1. My dog's been so sick lately. 2. We've been having lots of fun in science classes. 3. Why's the dog eating from the

63. ## Physics

An arrow is fired horizontally from the top of a 40.0-m vertical cliff and lands 125 m away. Therefore the arrow was fired at _____ m/s.

64. ## chemistry

enzymes convert glucose M=180.2 to ethanol M=46.1 according to the equation C6H12O6=2C2H5OH + 2CO2 what is the maximum mass of ethanol that can be made from 15.5 kg of glucose?

65. ## Psychology

I know a man who read to his 5 children every night before they went to bed, and they all could read before entering preschool. Suppose that this were true of all children we could find who were read to every night before going to bed but true of only a

66. ## psychology

1. A recent study confirms that people who run regularly, live longer. How can one explain that? 2. More retired people die each year than those who have not retired. Does this mean that delaying retirement will increase one's life expectancy? Explain.

67. ## psychology

Suppose that you have developed three new kinds of hair shampoo, and you want to know how people's preference depends on their age. Design an experiment to find out.

68. ## psychology

What implications do the results of an experiment have for subjects that were not observed in the experiment?

69. ## H. CHemistry

if the atmosphere can support a column of mercury 760 mm high at sea level, what height of a hypothetical liquid whose density is 1.40 times the density of mercury could supported?

70. ## english

What is the simple subject and simple predicate in sentence: The smell of cooking is delicious to the hungry campers.

71. ## Math Help!

is 10 000 more than 881 462 is 1000 000 less than 2 183 486 is 1 000 000 more than 746 000 is 1 000 000 less than 624 327 207

72. ## math

What is the ratio formed between two parallelograms one is 2 inches by 6 inches and the other is 6 inches by 18 inches?

73. ## Physics

A boy of mass 37.8kg. is rescued from a hotel fire by leaping into a firefighters' net. The window from which he leapt was 8.02 above the net. The firefighters lower their arms and he lands in the net so that he is brought to a complete stop in a time of

74. ## pre calc

lnX + ln2 = 3

75. ## Physics

A particular guitar string is supposed to vibrate at 220 , but it is measured to vibrate at 230 . By what percent should the tension in the string be changed to correct the frequency? I have been working for 7 hours of hw! Please help!

76. ## Math

Use the discriminant to determine how many real number solutions the equation has 1-7a^2=-7a-2

77. ## math

write 40% two different ways

78. ## math

find the volume of the solid whose base is bounded by y=e^(-x), y=3cos(x), and x=0 and whose cross sections cut by planes perpendicular to the x-axis are squares the answer is 3.992 units cubed but can someone explain to me how to get this answer using

79. ## Chem

Why does sodium in phenolphthalein change color?

80. ## math

Tyrone has $60 and his sister has$135. Both get an allowance of $5 each week. Tyrone decides to save his entire allowance, but his sister spends all of hers each week plus an additional$10 each week. After how many weeks will they each have the same

81. ## psychology

What is it the theory called when you tell your child that he can't go out an play until he eats his vegetables? .....very big grin..... Bribery! Maslow's Theory may be what you are looking for. See the site below.

82. ## psychology

In class we were asked to provide an one example of classical and operant conditioning. We have to identify the stimulus, response and reinforcers in each example. here are my examples: Clasical Conditioning- My cat comes running everytime she hears the

83. ## psychology

In class we were asked to provide an one example of classical and operant conditioning. We have to identify the stimulus, response and reinforcers in each example. here are my examples: Clasical Conditioning- My cat comes running everytime she hears the

84. ## psychology

In class we were asked to provide an one example of classical and operant conditioning. We have to identify the stimulus, response and reinforcers in each example. here are my examples: Clasical Conditioning- My cat comes running everytime she hears the

85. ## psychology

how can knowing the information processing model increase your learning potential? many decisions in our lives are based on intuition. Where does this intuition comes from? generally we see that older people have a better intuition on general day-to-day

86. ## math

Nine times the sum of a number and 23 is at least 27.

87. ## Precalculus

Hello, I have a question here that reads: If angle theta lies in quadrant iii & costheta= -2/root29 then determine the exact values of the other 2 trig ratios. When I take cos-1 of the above I get 111 degrees which would be in quadrant 2... Is that a

88. ## physical science

when a physical change in a sample occurs which of the following does not change? a. shape b. temperature c. volume d. composition d?

89. ## chemistry

The total mass of DNA in the body is 50.0 g. If the number of nucleotides in ONE STRAND of DNA is approximately 3.0 x 106, and the average length of a single nucleotide is 0.34 nm, what is the length (in km) of one strand of DNA when it is stretched out to

90. ## chemistry

If the average volume of all the blood in a human body is 4700 mL, what is the molarity of DNA in the human blood system?

91. ## chemistry

The human body is said to contain approximately 50.0 grams of DNA in the entire body. If the number of nucleotides in ONE STRAND of DNA is approximately 3.0 x 106, and the average molar mass of a nucleotide is 327 g/mol, what is the average molar mass of

92. ## Math- I'd really appreciate it if you could help!!

Point $G$ is the midpoint of median $\overline{XM}$ of $\triangle XYZ$. Point $H$ is the midpoint of $\overline{XY}$, and point $T$ is the intersection of $\overline{HM}$ and $\overline{YG}$. Find the area of $\triangle MTG$ if $[XYZ] =150$.

93. ## college pre calculus

A kite frame is to be made from 6 pieces of wood. The four border pieces have been cut 5 and 12. The long center piece is 13. what should the length of the cross pieces be in order to maximize the area of the kite.

94. ## Math

A circular pizza of radius 8 is cut into 8 equal slices. What is the perimeter of one slice?

95. ## Science

According to the following thermochemical reaction, how much energy is involved in the reaction of 18.5 g of NaHCO3? Is the reaction endothermic or exothermic according to how the thermochemical equation is written? 2NaHCO3(s) + 129 kJ → Na2CO3(s) +

96. ## french

Answer the question in a complete sentence: Est-ce que Les Miserables est une piece inconnue?

97. ## Physics

A golf ball is hit with an initial velocity of 15 meters per second at an angle of 35 degrees above the horizontal. What is the vertical component of the golf ball's initial velocity? a)8.6 m/s b)9.8 m/s c)12 m/s d)15 m/s I know you use 15cos 35 feta to

98. ## Geometry

for each parallelogram find the measures of the angles formed by extending two adjacent side through their common vertex: angle is 90 degrees