# Bill

Popular questions and responses by Bill
1. ## algebra

Are the following true or false? 1. The difference of two natural numbers is always a natural number. 2. The sum of two natural numbers is always a natural number. 3. The quotient of two natural numbers is always a natural number. 4. The difference of two

2. ## calc

Show that the equation x^3-15x+c=0 has at most one root in the interval [-2,2].

3. ## math

Find the exact area of the region that lies beneath the curve y = 3(x^[1/3]) 0 ≤ x ≤ 27

4. ## Chemistry

What quantum numbers specify these subshells? 2s n= l= 3p n= t= 6d n= l=

5. ## Honors Chemistry

Due to the screening effect, the 3s electrons of magnesium (Mg) feel an effective nuclear charge (Zeff) of: 1. +1 2. +2 3. −2 4. +12 5. +4

6. ## Chemestry

Iron metal reacts with oxygen gas to form rust, iron (III) oxide. Which of the following correctly shows the balanced equation for this reaction?

7. ## Calculus (Partial Derivatives)

A car dealer determines that if gasoline-electric hybrid automobiles are sold for x dollars apiece and the price of gasoline is y cents per gallon, then approximately H hybrid cars will be sold each year, where H(x,y)=6000−13x^(1/2)+2(0.1y+20)^(3/2). She

8. ## chemistry

What mass of F2 is needed to produce 116 g of PF3 if the reaction has a 77.4% yield?

9. ## Chemistry

Metals lose electrons under certain conditions to attain a noble-gas electron configuration. How many electrons must be lost by the element Ca? Is it 2 e^-? Which noble-gas electron configuration is attained in this process? argon radon krypton xenon

10. ## Chemistry

At a certain temperature and pressure, one liter of CO2 gas weighs 1.45 g. What is the mass of one liter of C4H10 gas at the same temperature and pressure?

11. ## Algebra

If f(x) = - 2x2 + 2x - 3, what is f(5)?

12. ## geometry

(4, 5)'(9, 5) and (5,1) are three of a quadrilateral whose opposite sides are equal and parallel.there are three possibilities for the co-ordinates of the missing vertex.Find all three,and draw the three quadrilateral on a grid

13. ## physics

Calculate the torque about the front support of a diving board, exerted by a 70 kg person 3.0 m from that support. (Take the positive direction to be clockwise.)

14. ## bio

In humans, the ABO blood type is under the control of autosomal multiple alleles. Red-green color blindness is a recessive X-linked trait. If two parents who are both type A and have normal vision produce a son who is color-blind and type O, what is the

15. ## chemistry

can O3, AsH3 and H2Se act as a lewis acid? please explain.

16. ## Biology

What are the roles of hydrogen peroxide, oxygen, hydrogen, and catalase in the following chemical reaction? catalase 2H2O2 > O2 + 2H2O A. Catalase is an enzyme, O2 and H2O are substrates, and H2O2 is a reactant. B. Catalase is a substrate, O2 and H2O are

17. ## Calculus (Partial Derivatives)

Using x hours of skilled labor and y hours of unskilled labor, a manufacturer can produce Q(x,y)=40xy1/5 units each week. Currently 20 hours of skilled labor and 243 hours of unskilled labor are being used. Suppose the manufacturer reduces the skilled

18. ## math

In the bac of an old cupboard you discover a note signed by a pirate famous for his bizarre sense of humor and love of logical puzzles. In the note he wrote that he had hidden treasure somewhere on the property. He listed five true statements and

19. ## PreCalculus

"A kite is flying 100ft off the ground, and its line is pulled taut. The angle of elevation of the kite is 43 degrees. Find the length of the line."

20. ## chemessty

What is the freezing point of an aqueous solution of 10.0 g of glucose (C6H12O6) in 50.0g H2O? (kf=-1.86 C/m)

21. ## spelling paragraph

I need to write a paragraph using the following words, acculturation,affable, aggrandize, approbation, callow, erudite, expedite, hackneyed, innuendo, inscrutable, intercede, peculate, querulous, remonstrate, repudiate, resilient, sedulous, tenuous Could

50. ## literature/poetry

1. If this be error and upon me proved, I never writ, nor no man ever loved. These lines are an example of a/an A. quatrain. B. octet. C. couplet. D. sestet. 2. The line "I wandered lonely as a cloud" is an example of A. a metaphor. B. a simile. C. a

51. ## statistics

A bag contains 7 red marbles, 6 white marbles, and 10 blue marbles. You draw 4 marbles out at random, without replacement. What is the probability that all the marbles are red? What is the probability that exactly two of the marbles are red? What is the

52. ## physics

A supertanker (mass = 1.57E+8 kg) is moving with a constant velocity. Its engines generate a forward thrust of 7.47E+5 N. Determine the magnitude of the resistive force exerted on the tanker by the water. 7.47×10^N is correct, but I need to know how

53. ## psychology

Dr. Jefferson is conducting an experiment in which she is interested in the effects of caffeine on visuospatial ability in adult participants. She conducts an experiment in which she gives one group a pill containing 20mg of caffeine and a second group a

54. ## Psychology

A researcher has conducted an experiment in which she has given participants a placebo, 10mg, and 20mg of a drug. She then measured their anxiety, blood pressure, and heart rate in response to the drug. How many levels does this experiment’s independent

55. ## Psy 326

We use _______________ to communicate the patterns and distribution of our measured variables.

The novel to kill a mockingbird feature a main character named scout. Scout is also the voice that tells the story. What point of view is used in the novel? A.First Person B.Third-Person Limited

57. ## Chemistry

What element forms an ion with an electronic configuration of [Xe] and a –2 charge?

58. ## Chemistry

A hot air balloon is filled with 1.39 × 106 L of an ideal gas on a cool morning (11 °C). The air is heated to 105 °C. What is the volume of the air in the balloon after it is heated? Assume that none of the gas escapes from the balloon.

59. ## chemistry

An ice cube of mass 10g at -10C is added to the beaker containing 150mL of water at 88.5C. Assuming no heat is lost to the surrounding; calculate the equilibrium temperature for the liquid after the ice melts.(Heat of fusion for H2O = 6.01 kJ/mol. Heat of

60. ## math

Managers should consider ethical aspects of their decisions because:

61. ## AP Chem

The following reaction has Kp = 109 at 25°C. 2 NO(g) + Br2(g) 2 NOBr(g) If the equilibrium partial pressure of Br2 is 0.0159 atm and the equilibrium partial pressure of NOBr is 0.0768 atm, calculate the partial pressure of NO at equilibrium.

62. ## Chemistry

Consider the following reaction. CH4(g) + 2 O2(g) CO2(g) + 2 H2O(l) ÄH = -891 kJ Calculate the enthalpy change for each of the following cases. 1.00 103 L methane gas at 719 torr and 26°C is burned in excess oxygen.

63. ## statistics

The average time to sew a pair of pants is 4.2 hours with a standard deviation of 30 minutes and if the distribution is normal then the probability of a worker finishing the pants in less than 3 hours is.

64. ## History

What are the two major functions of the Office of Management and Budget?

65. ## calculus ab

What is the integral of sin4xcos4x dx?

in the short story "gregory" by panos ioannides why does the author choose to use the title Gregory can someone please help me with the question thank you

67. ## math

For x+3/x-4 is less than or equal to 0, why is the interval notation [3,4)?

68. ## Accounting

How will the customer's bounced checks be handled on a bank reconciliation? a. add to the balance from the company records b. add to the bank statement balance c. subtract from the balance from the company records d. subtract from the bank statement

69. ## Language arts

In what way do the people actually "disappear" in "The City Is So Big"

70. ## Physics

A small ball of mass m is placed on top of a large ball of mass 3m. Both balls are dropped simultaneously from a height h = 5.50 m as shown in the figure. Assuming the radius of the large ball and small are small and thus negligible in comparison to the

71. ## Alegbra 1

Clay Potts owns a ceramic store. His brother Jack works for him. Jack earns wages of 50 dollars per day plus 10% of the profits. Clay gets the other 90% of the profits. On Monday the store makes a profit of 30 dollars. How much does Clay get?

72. ## math

tell whether each equation has one solution, zero solutions or infinite solutions 5(x-3)+6=5x-9

73. ## World History

(Need help with this prompt, just one paragraph will do) It is 1870, French forces leave Italy (to fight in the Franco-Prussian War) and Italians triumphantly declare Rome their united capital. You have been hired by Vittorio Emanuele II, the King of

74. ## Geometry

What's the lateral area of a right cylinder if the radius of the base is 12 mm and the altitude of the cylinder is 5 times the base radius?

75. ## physics

an initially resting 300g car is dragged along a horizontal frictionless table by a massless cord. The cord is attached to vertically hanging 60g mass by a frictionless massless pulley. If the car starts from rest, determine the time it would take for it

76. ## Math

If a person throws 3 darts at a dartboard, how many possible combinations are there to get a sum of 34?

77. ## Chemistry (Titrations)

In order to standardize a KMnO4 solution, 0.2848 g Fe(NH4)2(SO4)2·6H2O was dissolved in 25 mL 0.18 M H2SO4. The KMnO4 solution was added to the Fe(NH4)2(SO4)2·6H2O solution until a pale pink color persisted. The titration took 24.2 mL of KMnO4 solution.

10.55 Consider an experiment with four groups, with eight values in each. For the ANOVA summary table below, fill in all the missing results: Source Degrees of Freedom Sum of Squares Mean Square (Variance) F Among groups c - 1 = ? SSA = ? MSA = 80 FSTAT =

79. ## physics

Rubber tires and wet blacktop have a coefficient of kinetic friction of 0.5. A pickup truck with a mass 750 kg traveling 30.0 m/s skids to a stop. (a) what is the size and direction of the frictional force that the road exerts on the truck? (b) Find the

80. ## Econ

When the law of diminishing returns applies, which of the following would rise with increased employment of labor, ceteris paribus? A. Fixed costs B. Marginal cost C. Marginal revenue D. The wage rate

81. ## Chemistry

How many milliliters of 1.0 M NaOH must be added to 200. mL of 0.10 M NaH2PO4 to make a buffer solution with a pH of 7.50? (5 points)

82. ## physics

A boy is pushing his sled up a snowy slope. The sled has a mass of 20.4 kg and weighs 200 N. The boy pushes with a constant force of 75 N. The sled travels a distance of 10 m and gains 3 m in height. When the sled reaches the top, it is traveling 2 m/s.

83. ## Binomial Probability

Before 1918, wolves were shown as 55% male, 45% female. From 1918 to present they were shown as 70% male and 30% female. In a random sample of 12 wolves, what was the probability that 6 were male? What was the probibility that 6 or more were female? What

84. ## Science

which of the following effects would also occur at the end of an Ice Age 1.) an increase in volcanic activity near the equator. 2.) a global rise in the sea level. 3.) a worldwide extinction of the reptiles. 4.)a shorte length of the day. 5.)a complete

85. ## AP Chem

At a particular temperature, Kp = 0.25 for the following reaction. N2O4(g) 2 NO2(g) (a) A flask containing only N2O4 at an initial pressure of 5.3 atm is allowed to reach equilibrium. Calculate the equilibrium partial pressures of the gases. (b) A flask

86. ## AP Chem

At a particular temperature, K = 1.00 102 for the following reaction. H2(g) + I2(g) 2 HI(g) In an experiment, 1.23 mol H2, 1.23 mol I2, and 1.23 mol HI are introduced into a 1.00 L container. Calculate the concentrations of all species when equilibrium is

87. ## physics

What is the total force on the bottom of a swimming pool 20.5 m by 8.0 m whose uniform depth is 2.1 m?

88. ## Chemistry

The combustion of 0.1583 g benzoic acid increases the temperature of a bomb calorimeter by 2.93°C. Calculate the heat capacity of this calorimeter. (The energy released by combustion of benzoic acid is 26.42 kJ/g.) A 0.1710 g sample of vanillin (C8H8O3)

89. ## Chemistry

Consider the dissolution of CaCl2. CaCl2(s) Ca2+(aq) + 2 Cl-(aq) ÄH = -81.5 kJ A 12.4 g sample of CaCl2 is dissolved in 100. g of water, with both substances at 25.0°C. Calculate the final temperature of the solution assuming no heat lost to the

90. ## Math/Economics

Suppose that a firm has only one variable input, labor, and firm output is zero when labor is zero. When the firm hires 6 workers it produces 90 units of output. Fixed cost of production are $6 and the variable cost per unit of labor is$10. The marginal

91. ## College CHEM

Name for Sn(BrO3)

92. ## math

how much force does 1000lbs have when drop from 36"

93. ## CHEMISTRY

How to determine the molarity of a 1.8% NaCl solution.

94. ## Calc

At noon, ship A is 100 Kilometers due east of ship B, Ship A is sailing west at 12 k/h, and ship B is sailing S10degrees west at 10k/h. At what time will the ships be nearest each other and what time will the distance be? (not a right triangle)?

95. ## physics

PLEASE HELP !!!!!!Find the acceleration reached by each of the two objects shown in figure below if the coefficient of kinetic friction between the 7.00 kg object and the plane is 0.250. img411.imageshack.us/img411/5841/p449.gif I keep getting 3.9=a

96. ## trig

Is the somewhere where I could learn how to graph polar coordinates such as (1,pi/3)?

97. ## Math

Given:a and b are first-quadrant angles, sin a = 5/13 , and cos b = 3/5 , evaluate sin(a - b).

98. ## math

Explain why the scratch arithmetic algorithm works.