# Joey

Popular questions and responses by Joey
1. ## Pre Calculus

A piece of cardboard measuring 13 inches by 11 inches is formed into an open-top box by cutting squares with side length x from each corner and folding up the sides. a. Find a formula for the volume of the box in terms of x b. Find the value for x that

2. ## Precalculus

The height (in centimeters) of a candle is a linear function of the amount of time (in hours) it has been burning. When graphed, the function gives a line with a slope of -0.4 . Suppose that the height of the candle after 13 hours is 24.8 centimeters. What

3. ## History

Which describes the terms of the agreement at the 38th parallel? A. This armistice defined the 38th parallel as the dividing line between the careers, and though it called for cease-fire, it did not cite in official end of that war. B. This nonaggression

4. ## Vince

Please show work for Determine the final end (final) value of n in a hydrogen atom transition, if electron starts in n = 1 and the atom absorbs a photon of light with an energy of 2.044 X 10^-18J? thank you very much for your help

5. ## Statistics

A local grocery store wants to estimate the mean daily number of gallons of milk sold to customers. Assume the number of gallons sold follows the normal distribution, with a population standard deviation of 5.10 gallons. A random sample of 60 days shows

6. ## physics

A uniform solid sphere rolls down an incline. (a) What must be the incline angle if the linear acceleration of the center of the sphere is to have a magnitude of 0.20g? 1° (b) If a frictionless block were to slide down the incline at that angle, would its

7. ## physics

Extreme-sports enthusiasts have been known to jump off the top of El Capitan, a sheer granite cliff of height 910m in Yosemite National Park. Assume a jumper runs horizontally off the top of El Capitan with speed 5.0m/s and enjoys a freefall until she is

8. ## math

Can someone help with me this question? 1. Lea spent \$25 of the money she saved. She still has 60% of her money left. How much does have left? 0.60 x 25=\$15? 2. A 2.6L container of juice costs \$3.00. How much are you paying for 1 L?

9. ## Chemistry

Write the balanced dissociation equation for MgCl2. (1 mark) MgCl2(s) + H2O(l) ==> Mg^+2(aq) + 2Cl^-(aq) b) In 300.0 mL of a 0.50 M MgCl2 solution, what would be the concentration of the chloride ions?

10. ## science

Suppose that the 1.3 km span of the golden gate bridge had no expansion joints. Calculate how much longer the bridge would be if the temperature of the bridge increases by 35 degrees celsious

11. ## Chem 400

Direct reaction of solid iodine (I2) and gaseous chlorine (Cl2) produces an iodine chloride,(IxCly), a bright yellow solid. 0.678 g of iodine (I2) is mixed with 0.851 g of chlorine (Cl2). After the elements react, some chlorine is left over along with a

12. ## Trigonometry

Mountain officials want to build a new ski lift from B to C as shown in the figure below. The distance from A to C is 1480 feet. They measure angle DAC to be 32 degrees and angle DBC to be 18 degrees. What is the distance A from to B? Round your answer to

13. ## trig

Find csc(theta), tan (theta), and cos (theta), where theta is the angle shown in the figure. Give exact values, not decimal approximations c=10 b=7 a=7.14 the right angle is locate between sides a and b and the theta angle is an acutle angle sides b and c.

A chocolate bar is separated into several equal pieces. If one person eats 1/4 of the pieces, and a second person eats 1/2 of the remaining pieces, there are six pieces left over. Into how many pieces was the original bar divided?

15. ## Biology- check my answer (diff one)

Which of the following are true concerning living things? Check all that apply. A)They contain a vital force absent in nonliving things. B)They are composed of molecules that contain carbon-carbon bonds. C)They undergo chemical reactions to use energy they

16. ## Math 111

Find a 4 degree polynomial having zeros -6,-3,2 and 6 and the coefficient of x^4 equal 1 The "coefficient of x^4 equal 1" is really throwing me off. Thanks.

17. ## Calculus

A construction company wants to build a rectangular enclosure with an area of 1000 square feet by fencing in three sides and using its office building as the fourth side. Your objective as supervising engineer is to design the enclosure so that it uses the

18. ## PHYSICS

A circular curve of highway with radius 200m is designed for traffic moving at 100km/h, and is banked so that cars can make the curve even without friction at that speed. What is the correct angle of banking for this curve? Show steps, please.

19. ## biology

In guinea pigs, the allele for a rough coat (R) is dominant over the allele for a smooth coat (r). A heterozygous guinae pig (Rr) and a homozygous recessive guinea pig (rr) have a total of nine offspring. The punnett square for this cross shows a 50

20. ## Physics

A wheel rotating initially at an angular velocity of 1.0 rad/s, accelerates over a 10 S interval at a rate of 0.1 rad/s^2. What angular displacement does the wheel undergo in this 10 S interval, in terms of revolutions?

21. ## math

A standard deck of cards has had all the face cards (Jacks, queens, and kings) removed so that only the ace through ten of each suit remains. A game is played in which two cards are drawn (without replacement) from this deck and a six-sided die is rolled.

22. ## physics

An automobile traveling at 50.0 km/h has tires of 100.0 cm diameter. (a) What is the angular speed of the tires about their axles? 1 rad/s (b) If the car is brought to a stop uniformly in 25.0 complete turns of the tires (without skidding), what is the

23. ## American Governent

1. What type of power does the Constitution grant to the Supreme Court? (1 point) executive power federal power judicial power legislative power 2. Which are examples of judicial restraint in the Supreme Court? Select all that apply. (3 points) The verdict

Hershey and Chase used the 35S isotope to label proteins. How does this isotope differ from the 32S isotope found in greatest natural abundance, and why did they choose 35S instead of 32S? A)35S has more protons than 32S; Hershey and Chase used it because

25. ## Calculus (optimization problem)

A cyclinderical tank with no top is to be built from stainless steel with a copper bottom. The tank is to have a volume of 5ð m^3. if the price of copper is five times the price of stainless steel, what should be the dimensions of the tank so that the

26. ## government

What is the relationship between global conflicts, international trade, and foreign relations among the nations of the world?

27. ## math

what is 1.07 x 10^3 in standard form

28. ## Chemistry Dimensional analysis

A cyclist rides at an average speed of 18 miles per hour. if she wants to bike 212km, how long in hours must she ride? What I have so far.. 212km(10^3 miles

29. ## science

A force of 20 n gives a ball an acceleration of 4.0 m/s3 on a lever frictionless surface. what is the mass of the ball?

30. ## math

express each answer in exponential form using the indicated bases 4x4x4x4,base 2

31. ## Physics: Vectors

A hiker walks 10.0 km[NE], 5.0 km[W], and then 2.0 km[S] in 2.5 h. (a) What is the hiker's displacement? (b) In what direction must the hiker set out, in order to return by the most direct route to the starting point? (c) If the hiker walks at a constant

32. ## Geometry

B is the midpoint of segment AC. AB= 5X and BC =3X+4 find AB, BC and AC

33. ## physics

A plum is located at coordinates (-4.0 m, 0.0 m, 6.0 m). In unit-vector notation, what is the torque about the origin on the plum due to force F whose only component is indicated by each of the following equations? (a) Fx = 8.0 N ô = N · m (b) Fx = -5.0

34. ## Math

How many terms of the A.P, 1+4+7+.......are required to make a sum of 590?

35. ## Geometry

the steps that you would follow to recreate a triangle using a protractor, a string, and the AAS Congruence Theorem, written out in words. I'm lost know that you need two angles and a side.No clue how to explain. Please help I've been sitting here all day

36. ## Pre Calculus

A cylinder shaped can needs to be constructed to hold 200 cubic centimeters of soup. The material for the sides of the can costs 0.02 cents per square centimeter. The material for the top and bottom of the can need to be thicker, and costs 0.06 cents per

37. ## Calculus

Differentiate. g(x) = 5e^x√x

38. ## Calculus

The management of the UNICO department store has decided to enclose an 870 ft2 area outside the building for displaying potted plants and flowers. One side will be formed by the external wall of the store, two sides will be constructed of pine boards, and

39. ## Physics

A 4.12 kg mass undergoes an acceleration along both the x and y directions. Ax = -2.60 m/s2 and Ay = 3.50 m/s2. Find the magnitude of the resultant force. Answer in units of N.

40. ## Chemistry 400/ Chem 1A

A chemist mixes 5.216 g of potassium permanganate, 2.318 g of ethanol, and excess sulfuric acid. These chemicals react as follows: 4 KMnO4 + 5 C2H5OH + 6 H2SO4 ---> 4 MnSO4 + 5 CH3COOH + 2 K2SO4 + 11 H20 What mass of sulfuric acid is consumed in this

41. ## physics, math

Part A & B are 0.10m apart. A point charge of +3.0*10^-9C is placed at A and a point charge of +1.0*10^-9C is placed at B. X is a point on the straight line through A and B. If a third charge C or charge 1.5*10^-9 is placed at X, where must X be for the

42. ## trig and geometry

bernhardt and julia are observing an eagles nest in a tree. Julia is 75m from the tree, and sees it at an angle of elevation of 42 degrees A)How high up the tree is the nest B)Bernhardt is standing 30m behind julia. At what angle of elevation does he see

43. ## Chemistry

1- Determine the [OH-] and pH of a solution that is .250 M in HCO-3 2- Calculate the [H3O+] and pH of each polyprotic acid solution: a) .125 M H2CO3 b) .125 M H3C6H5O7

44. ## English

How do these develop theme of these allusions from Hamlet? 1. "I would have such a fellow whipped for o'erdoing Termagant" (II,ii,14) So basically Hamlet is telling his actors not over act during the play. 2. “For O, For O, the hobbyhorse is forgot”

45. ## math

what is the fraction between 4/9 and 5/9

46. ## Math

If 4 sin^2 θ - 3 is equal to 0 . What is the value of θ for 0° < θ < 90° ?

47. ## Chemistry La

An unknown solution may contain some of the cations listed below. One student preformed a series of experiments to determine what ions are in the solution. Based upon the experiments performed by the students, the results are as follows: a) On addition of

48. ## Maths

Prove algebraically that the difference between any two different odd numbers is an even number. Thanks.

49. ## Math (Fraction Word Problem)

You have three-fifths of a pizza leftover, and you plan to eat half of it for lunch. How much of the original pizza do you have left over? If I have 3/5 of a pizza leftover and I plan to eat 1/2 of it for lunch doesn't that mean you have to divide? This is

50. ## Chemistry

A 0.200 g sample of carbon dioxide, CO2, has a volume of 525 mL and a pressure of 473 mmHg . What is the temperature of the gas in kelvins?

51. ## Calculus

The volume V of a growing spherical cell is V =4/3πr^3, where the radius is measured in micrometers (1 µm = 10^−6m). Find the average rate of change of V with respect to r when r changes from 3 to each of the following. i)3 to 6µm ii)3 to 4µm

52. ## Chemistry

How come lead is denser than copper though more copper atoms can fit into a same size cube than lead atoms can?

53. ## chimistry

The molar heat of fusion of lead (Pb) is 1.140 kcal/mol. How much heat must be added to 97.0 g of solid lead at its melting point in order for it to completely melt? A 1.44 kJ B 10.18 kJ C 12.48 kJ D 25.04 kJ

54. ## Chemistry 400/ Chem 1A

Assuming that the resolution of an electron microscope is equal to the deBroglie wavelength of the electrons used, what is the resolution of an electron microscope (in nm) when the electrons are accelerated to a speed of (5.60x10^5) m/s?

55. ## Calculus

A light is hung 15 ft above a straight horizontal path. If a man 6 ft tall is walking away from the light at the rate of 5 ft/sec, how fast is his shadow lengthening and at what rate is the tip of the man’s shadow moving?

57. ## Physics

A 55.0kg cheerleader uses an oil-filled hydraulic lift to hold four 130kg football players at a height of 1.20m. If her piston is 19.0cm in diameter, what is the diameter of the football players' piston?

58. ## phyics

A hand exerciser utilizes a coiled spring. A force of 86.9 N is required to compress the spring by 0.0231 m. Determine the force needed to compress the spring by 0.0432 m.

59. ## phyics

An object on a vertical spring oscillates up and down in simple harmonic motion with an angular frequency of 25.1 rad/s. Calculate the distance d by which the spring stretches from its unstrained length when the object is allowed to hang stationary from

60. ## phyics

A 0.20-kg object is attached to the end of an ideal horizontal spring that has a spring constant of 120 N/m. The simple harmonic motion that occurs has a maximum speed of 1.1 m/s. Determine the amplitude A of the motion.

61. ## physics

The four tires of an automobile are inﬂated to a gauge pressure of 1.7 × 10 5 Pa. Each tire has an area of 0.023 m2 in contact with the ground. Find the weight of the automobile. Answer in units of N

62. ## statistics

Which of the following is NOT true with respect to the properties of probability? 0 < x < 1 P(S) = 1, where S is the sample space P(A) + P(Ac) = 0 If two events are independent then P(A and B) = P(A) * P(B)

63. ## Physics

A file cabinet weighing 1500 N is at rest on the floor. The coefficient of static friction between the floor and the cabinet is 0.5. What is the minimum force required to make the file cabinet move horizontally

64. ## Differential Calc

If: 0 = f(1) = a+b+c+d 2 = f(-2) = -8a+4b-2c+d 0 = f'(1) = 3a+2b+c 0 = f'(-2) = 12a-4b+c "since we now have four equations and four unknowns, we can determine unique solution. Solving for "a" and "b", a=, b=" Please show the steps, I am so confused and no

65. ## @elena

You helped me with this question earlier today, the answer you got was incorrect, i tried looking through your calculations but i cant find the mistake. the program wont let me see the right answer just tells the answer i put in was wrong. can you please

66. ## Physics help!!

A Styrofoam bucket of negligible mass contains 1.60 kg of water and 0.425 kg of ice. More ice, from a refrigerator at -14.8 degree C, is added to the mixture in the bucket, and when thermal equilibrium has been reached, the total mass of ice in the bucket

67. ## Physics help!!

A Styrofoam bucket of negligible mass contains 1.60 kg of water and 0.425 kg of ice. More ice, from a refrigerator at -14.8 degree C, is added to the mixture in the bucket, and when thermal equilibrium has been reached, the total mass of ice in the bucket

68. ## chemistry

A certain liquid has vapor pressures of 50 Torr. 1 mol of an involatile solute is dissolved in 1 mol of this liquid. What is the vapor pressure of the liquid above this solution?

69. ## analytic geometry

fin the center ,principal axis vertices, sketch the graph of 4x^-y^2 +56 x +2y+195=0

70. ## Math 111

This is a question that deals specifically with WebWork. Here is the question: Write the set of points from -2 to 4 but excluding -1 and 4 as a union of intervals my solution to this would be: [-2,4]U(-1,4) my reasoning: The first set includes -2 and goes

71. ## Enviromental Science

It is true that ______ a) few plants grow well around water b) plants are better able to seek water than are animals c) water covers about 95% of the plants d) the amount of water in the enivronment limits the kinds of organisms that can live there e)

72. ## science

if a force of 50 N stretches a spring 250 mm, what is the spring constant?

73. ## english

use yellow flower in a sentence

74. ## chemistry

Your body deals with excess nitrogen by excreting it in the form of urea, NH2CONH2. The reaction producing it is the combination of arginine (C6H14N4O2) with water to give urea and ornithine (C5H12N2O2). C6H14N4O2 + H2O  NH2CONH2 + C5H12N2O2 [Molar

75. ## chemistry

how many grams of NaOH must be added to 0.250 litres of water to form a solution of PH=10.0?

76. ## biology

In sheep, the allele for white wool (A) is dominant over the allele for black wool (a). How would you determine the genotype of a white ram, or male sheep?

77. ## Psychology

How can BATNA assist clients in human services?

78. ## johnglenn

Discuss some of the advantages to having a cycle that partially replenishes itself. In the Calvin cycle, what would happen to the cycle if there was no carbon dioxide available

79. ## psychology

discuss the role of fathers in childhood development? i've read the section and it does not really mention about the father, but mostly the motehr.

80. ## statistics

Determine the sample size required to estimate a population proportion to within 0.032 with 95.7% confidence, assuming that you have no knowledge of the approximate value of the sample proportion. Sample Size = B. Repeat part the previous problem, but now

81. ## Physics

Hi I am absolutely stumped on this question. A loudspeaker is placed between two observers who are 110 m apart, along the line connecting them. If one observer records a sound level of 60.1 dB and the other records a sound level of 74.9 dB, how far is the

82. ## Physics

Hi I am absolutely stumped on this question. A loudspeaker is placed between two observers who are 110 m apart, along the line connecting them. If one observer records a sound level of 60.1 dB and the other records a sound level of 74.9 dB, how far is the

83. ## Physics

Hi I am absolutely stumped on this question. A loudspeaker is placed between two observers who are 110 m apart, along the line connecting them. If one observer records a sound level of 60.1 dB and the other records a sound level of 74.9 dB, how far is the

84. ## Physics

Hi I am absolutely stumped on this question. A loudspeaker is placed between two observers who are 110 m apart, along the line connecting them. If one observer records a sound level of 60.1 dB and the other records a sound level of 74.9 dB, how far is the

85. ## Math

how would you solve this problem? Adult tickets to a play cost \$12 and children's tickets cost \$5. If 220 tickets were sold and \$2542 was collected, how many of each kind of ticket was sold? There are 500 seats in the theater and 280 seats are already

86. ## math

3 coins are flipped, find the probabilities of: a) P(two heads) b) P(at most two heads) c) P(no heads)

87. ## ENGLISH

I am writing an essay in which I have to analyze and interpret a television show or movie. This work must be geared toward my assigned topic (Law) I want to use either the TV show HOUSE, or the movies Philadelphia, a time to kill, or remember the titans.

88. ## algebra problem

If you have the sume of squares of the digits of a positive two-digit number is 20, the tens digit is 2 more than the units digit. answer is 2^2 and 4^2 (?)

89. ## English

Which of the following is NOT an exception when acknowledging sources through citation? a. Common knowledge b. Paraphrasing c. Facts available from a d wide variety of sources d. Your own findings from research I think it's b, but I'm not sure. Any ideas

90. ## Science

A drop of ink is in a tube.A stopper is used.What will happen to the drop of ink in the tube when you place your hands around the flask for 5 minutes? Is water in the tube? And what's the stopper used for? If so, heat is transferred from the hand to the

91. ## Earning capacity

How can we estimated the future earning capacity of an enterprise? Crystal Ball? The key here is estimate. Anyone can estimate. Past performance indicates many future trends. Changing markets indicated changes also. But in reality, these are estimates

92. ## Econ(again)

When state-owned enterprises are sold, how should their values be established? Should the value be based on the cost of the assets in place, the past earning power of the enterprise, or the future earning potential in a competitive economy? The value

93. ## Employment

What effect will the privatization of currently state-run enterprises have on the employment levels in those enterprises in the short run? and in the long run? In the short run, employment will drop as the enterprise will have to reduce operating costs to

94. ## Math

A sports club found that 100 of its members played at least one of football, tennis or badminton. Thirty-nine played football, 31 played tennis and 51 played badminton. Of these, 9 played both football and tennis, 8 played both tennis and badminton and 10

95. ## chemistry

How much heat is needed to convert 840. g of ice at -20°C to steam at 134°C?

96. ## chemistry

What is the osmotic pressure at 25°C of a solution containing 0.50 mol/L of Al(NO3)3?

97. ## chemistry

What is the final temperature when 1.16 kJ of energy is added to 11.0 g ice at 0°C? Assuming the specific heat of ice is 2.03 J/g * C.

98. ## physics

It is observed that rider A closes the 48 gap in a time of 6 seconds (a=ft/s^2). a) What speed was rider A moving while located 48 feet behind rider B? b) As timed from when rider A was 48 feet behind rider B, how many seconds elapse before rider A matches

99. ## world history

i just need help with one question i want to make sure if i am correct or should i change my answer? during the ice age,people migrated from asia across what is now bering strait to ? a.east africa b.west africa c.europe d.the americas i think its c or d i