# Questions Asked onMarch 10, 2011

1. ## chemistry

if 8.6L of H2 reacted with 4.3L of O2 at STP, what is the volume of gaseous water collected (assuming none of it condenses)? 2H2(g) + O2(g) => 2H2O(g)

2. ## physics

Your new designer chair has an S-shaped tubular metal frame that behaves just like a spring. When your friend, who weighs 580 N, sits on the chair, it bends downward 5 cm. What is the spring constant for this chair?

3. ## chemistry

Write the equation for the dissolution of AgCL(s) in H20(I).Express your answer as a chemical equation. Identify all of the phases in your answer. I tried writing it as AgCl Ag+ + Cl- but this is incorrect.

4. ## Calculus

The function y=Asin (sqrt(k/m)t) represents the oscillations of a mass m at the end of a spring. The constant k measures the stiffness of the spring. 1. Find the first positive time time t1 at which the mass is farthest from its equilibrium position:

5. ## Math

How do I use the sigma notation to express the series : 1+5+25+125+625+3125?

6. ## Chemistry

Calculate the concentrations of H3O+ and OH- ions in a 0.25 M HClO4 solution.

7. ## chemistry

Ka for hypochlorous acid, HClO, is 3.0*10^(-8). Calculate the pH after 10.0, 20.0, 30.0, and 40.0 mL of 0.100M NaOH have been added to 40.00mL of 0.100M HClO.

8. ## Algebra

Find the polynomial function P of the lowest possible degree, having real coefficients, with the given zeros. 3+2i, -2 and 1

9. ## Chemistry

The pH of a 0.0642 M solution of a monoprotic acid is 3.86. Is this a strong acid?

10. ## physics

A 3.00 kg block starts from rest at the top of a 30° incline and accelerates uniformly down the incline, moving 1.94 m in 1.70 s. (a) Find the magnitude of the acceleration of the block. (b) Find the coefficient of kinetic friction between the block and

11. ## optimization calculus

sandy is making a closed rectangular jewwellery box with a square base from two different woods . the wood for top and bottom costs \$20/m^2. the wood for the side costs \$30/m^2 . find dimensions that minimize cost of wood for a volume 4000cm^3?

12. ## Chemistry

"A voltaic cell is constructed by immersing a strip of sillver metal in a 1.0 MAgNO3 solution and a strip of cadmium metal in a 1.0M Cd(NO3)2 solution. The circuit is completed by a wire and a salt bridge in the usual way. a. Write the balanced overall

13. ## chemistry

What is the concentration of a HNO3 solution if 10.0 mL of the solution is neutralized by 3.6 mL of a 0.20 M NaOH solution?

14. ## chemistry

The solubility product for Zn(OH)2 is 3.0x10^-16. The formation constant for the hydroxo complex,Zn(OH)4^2- , is 4.6x10^17. What is the minimum concentration of OH- required to dissolve 1.6×10−2 mol of Zn(OH)2 in a liter of solution?

15. ## chemistry

The poH of a solution of 0.25mol/dm3 of Hcl acid is

16. ## physics

A proper lifetime of a certain particle is 100.0ns. a) How long does it live in the lab frame if it moves at V=0.960c? b) How far does it travel in the lab during that time? c) What is the distance travelled in the lab frame according to an observer moving

17. ## optimization calcus

A rectangular rose garden will be surrounded by a brick wall on three sides and by a fence on the fourth side. The area of the garden will be 1000m^2. The cost of the brick wall is \$192/m. The cost of the fencing is \$48/m. Find the dimensions of the garden

18. ## statistics

The number of viewers of American Idol has a mean of 21 million with a standard deviation of 10 million. Assume this distribution follows a normal distribution. Refer to the table in Appendix B.1. What is the probability that next week's show will: (a)

19. ## algebra

if 3x years from today, Megan will be (3y + 4) times her present age, what is Megan's present age in terms of x and y?

20. ## Statistics

the average length of time for students to register for fall classes at a certain college has been 50 minutes. a new registration procedure using modern computing machine is being tried. if a random sample of 12 students had an average registration time of

21. ## algebra

The power P needed to propel a boat is directly proportional to the cube of the speed of the boat. A 100 hp engine is needed to propel a boat at 15 knots. Find the power needed to drive the boat at 20 knots.

22. ## Chemistry

HA and HB are both weak acids although HB is the stronger of the two. Will it take a larger volume of a 0.10 M NaOH solution to neutralize 50.0 mL of 0.10 M HB than would be needed to neutralize 50.0 mL of 0.10 M HA?

23. ## trig

if cot of theta is less than zero, and csc of theta is less than zero what quadrant is theta in?

How much work must be done to accelerate a baton from rest to an angular speed of 7.27 rad/s about its center? Consider the baton to be a uniform rod of length 0.529 m and mass 0.478 kg

25. ## Accounting

On June 30, 2011, Georgia-Atlantic, Inc., leased a warehouse facility from IC Leasing Corporation. The lease agreement calls for Georgia-Atlantic to make semiannual lease payments of \$585,423 over a three-year lease term, payable each June 30 and December

26. ## physics

A block of weight 200N rest on a rough horizontal table when the block just begin slip the pulling force found to be 40N,what coefficient of friction between the two surfaces

27. ## Algebra and Trig

Aldo has feet of fencing. He will use it to form three sides of a rectangular garden. The fourth side will be along a house and will not need fencing. What is the maximum area that the garden can have?

28. ## chemistry( urgent)

what do we assume about volume of the actual molecules themselves in a sample of gas, compared to the bulk volume overall?why?

29. ## Physics

An eight turn coil encloses an elliptical area having a major axis of 40.0 cm and a minor axis of 30.0 cm. The coil lies in the plane of the screen and has a 6.10 A current flowing clockwise around it. If the coil is in a uniform magnetic field of 2.07

30. ## Physics

A loud speaker emits energy in all directions at a rate of 2.75 J/s . What is the intensity level at a distance of 25 m?

31. ## physics

Assume that the earth is a uniform sphere and that its path around the sun is circular. (a) Calculate the kinetic energy that the earth has because of its rotation about its own axis. For comparison, the total energy used in the United States in one year

32. ## Chemistry

Like water, liquid ammonia undergoes autoionization: (a) Identify the Brønsted acids and Brønsted bases in this reaction. (b) What species correspond to H and OH and what is the condition for a neutral solution?

33. ## Check: Geography

1.The Soviet program of creating cotton fields in central Asia had disastrous consequences for: a. the Caspian Sea b. the Aral Sea c. Lake Baikal d. the Black Sea answer: B 2.What occurred after the fall of the Ottoman Empire? a.The Seljuk Turks conquered

34. ## Chemistry

Use the data in Table 15.3 to calculate the equilibrium constant for the following reaction: HCOOH(aq) + OH(aq) HCOO(aq) + H2O(l)

35. ## optimization calculus

a real estate office manages 50 apartments in downtown building . when the rent is 900\$ per month, all the units are occupied. for every 25\$ increase in rent, one unit becomes vacant. on average , all units require 75\$ in maintenance and repairs each

36. ## Physics

An eight turn coil encloses an elliptical area having a major axis of 40.0 cm and a minor axis of 30.0 cm. The coil lies in the plane of the screen and has a 6.10 A current flowing clockwise around it. If the coil is in a uniform magnetic field of 2.07

37. ## Chemistry

Calculate the amount of energy released when Methane is burned.

38. ## Chemistry

How many grams of Ammonia, NH3 can be made from 250. grams of N2(g) ? ( first Balance the equation) N2 (g) + H2 (g) > NH3 (g)

39. ## college physics

A cue ball initially moving at 4.3m/s strikes a stationary eight ball of the same size and mass. After the collision, the cue ball’s final speed is 2.3 m/s at angle 1 with respect to it's original line of motion. The 8 ball moves with unknown speed at an

40. ## math

ryan is 5 feet tall. his shadow is 9 feet long and the shadow of a building is 36 feet long. how tall is the building?

Chris has \$3.85 in dimes and quarters. There are 25 coins in all. How many of each type of coin does he have? If d represents the number of dimes and q represents the number of quarters, what two equations describe the problem?

42. ## Chemistry

If 10.0 grams of sodium bicarbonate reacts with 50.0mL of 2M acetic acid, what is the limiting reactant? what reactant is in excess, and by how much? What volume of carbon dioxide gas would form?

43. ## Science

17. A small dog is trained to jump straight up a distance of 1.1 m. How much kinetic energy does the 7.7-kg dog need to jump this high? (The acceleration due to gravity is 9.8 m/s2.) Show your work. (3 points)

44. ## Accounting

American Food Services, Inc., leased a packaging machine from Barton and Barton Corporation. Barton and Barton completed construction of the machine on January 1, 2011. The lease agreement for the \$4 million (fair value and present value of the lease

46. ## Chemistry

Calculate the amount of energy released when Butane is burned.

47. ## Chemistry

What is the oxidation states for K2CrO4

48. ## 7th grade math pre algebra

I'm confused about this math question my teacher gave us today. Bowser's dog food is 40% meat. How much dog food would Bowser eat in order to get 11 kgs of meat?

49. ## chemistry

What is the percent composition of O in C8H8O3

50. ## trig

if csc of theta is greater than zero and sec of theta is less than zero what quadrant is theta in?

51. ## Statistics

The weights of adult males are normally distributed with a mean of 172 lb and a standard deviation of 29 lb Q.Find the weight that divides the upper 2% of weights from the lower 98%

52. ## chemistry

How many grams of sodium chloride do you need to prepare 250 mL of a 5.00%(w/v) sodium chloride solution

53. ## fraction

If 5/8 of the apples are red,and the rest of the apples are green,what fraction of the apples are green?

54. ## physics

A proper lifetime of a certain particle is 100.0ns. a) How long does it live in the lab frame if it moves at V=0.960c? b) How far does it travel in the lab during that time? c) What is the distance travelled in the lab frame according to an observer moving

55. ## history

The Progressive Era (1890-1920) What does the outcome tell us about the way americans of the time felt about progressive reform movements?

56. ## Trig

If the terminal side of theta in standard position contains the point (5,8). Find the exact value of tan of theta

57. ## physics

whenever two Apollo astronauts were on the surface of the moon, a third astronaut orbited the moon, assume the orbit to be circular and 100 km above the surface of the moon, where the acceleration due to gravity is 1.52 m/s^2. the radius of the moon is

58. ## Chemistry

A student titrates 0.025 M KOH into 50.00 ml of a solution of unknown weak acid HA. Equivalence point is reached when 30.00 ml of the KOH has been added. After 15.00ml of the KOH has been added the pH of the mixture is 3.92. A. What is the concentration of

59. ## calculus

The data entry speed (in entries per minute) of a data clerk trainee is represented by the following equation, where x is the number of hours of training he has had. S = 10 0.8x + 4 , 0 ≤ x ≤ 100 What is the rate at which his speed is changing and what

60. ## Chemistry

How many grams of ice at 0 oC and 1 atm could be melted by the addition of 2.2 kJ of heat? The ∆Hfus of ice is 6.0 kJ/mol.

A 12.1 g CD with a radius of 6.16 cm rotates with an angular speed of 31.1 rad/s. What is its kinetic energy?

62. ## Chemistry

Calculate the amount of energy released when Ethanol is burned.

63. ## Chemistry

The three common chromium oxides are CrO, Cr2O3, and CrO3. If Cr2O3 is amphoteric, what can you say about the acid-base properties of CrO and CrO3?

64. ## Physics

The density of a 4.41-m long rod can be described by the linear density function λ(x) = 111 g/m + 12.3x g/m2. One end of the rod is positioned at x = 0 and the other at x = 4.41 m. found total mass of rod to be: 609 grams need help finding : the

65. ## Chemistry

Asolution contains a weak monoprotic acid HA and its sodium salt NaA both at 0.1 M concentration. Show that [OH] Kw/Ka.

66. ## chemistry

How many grams of Ammonia, NH3 can be made from 250. grams of N2(g) ?

67. ## geometry

Quadrilateral ABCD is a rhombus with diagonals AC and BD. if angle M equals 25 find the measures of angles 2 , 3 , 4 and 5

At the end of five days, Joseph had saved \$30. If each day he saved \$2 more than the day before, how much money did Joseph save each day?

69. ## geometry

CUTTING A CIRCLE INTO EQUAL SECTION OF A SMALL CENTRAL ANGLE TO FIND THE AREA OF A CIRCLE BY USING THE FORMULA A=PIE R2

70. ## Art Appreciation(Art101)

Compare Raphael’s School of Athens to Veronese’s Christ in the House of Levi. Explain how each artist reflected the environment of Rome and Venice during the Renaissance period.

71. ## pre algebra

A 0.25 kg mass is horizontally attached to a spring with a stiffness 4 N/m. The damping constant b for the system is 1 N-sec/m. If the mass is displaced 0.5 m to the left and given an initial velocity of 1 m/sec to the left, find the equation of motion.

72. ## calculus

The number of units of weekly output of a certain product is represented by the equation shown below, where x is the number of workers on the assembly line. There are presently 68 workers on the line. Q(x) = 200x + 4x2 (a) Find Q'(x) and estimate the

73. ## Chemistry

How would the absorbance of the standard solution have been affected if 0.00050 M NaSCN had been used in place of 0.00040 M NaSCN?

74. ## Pre-Calculus

A photogrpaher points a camera at a windows in a nearby building forming an angle of 42 degrees with the camera platform. If the camera is 52 meters from the building , how high above the platform is the window, to the nearest hundreth of a meter. The

75. ## Chemistry

How many moles of acetic acid are there in 25 mL container?

76. ## Physics

Your sonic range finder measures the distance to a nearby building at 20m. The range finder is calibrated for sound traveling 343 m/s, but on this very cold day the speed of sound is only 309 m/s. How far away is the building?

77. ## physics

A car is driven east for a distance of 49 km, then north for 21 km, and then in a direction 30° east of north for 27 km. Determine (a) the magnitude (in km) of the car's total displacement from its starting point and (b) the angle (from east) of the car's

78. ## physical science

the average speed of sound in water is 1500 m/s. how long would it take a sound to travel 9000m/s

79. ## FRENCH

About the Passe Compose, could I get a few notes on that please. I would also like notes on the Terminology.

80. ## calculus

Suppose that the proportion P of voters !@#\$%^&cognize a candidate's name t months after the start of the campaign is given by the following equation. (Round your answers to three decimal places.) P(t) = 11t t2 + 100 + 0.14 (a) Find the rate of change of P

81. ## calculus

Find the coordinates of points where the graph of f(x) has horizontal tangents. As a check, graph f(x) and see whether the points you found look as though they have horizontal tangents. f(x) = −x3 + 6x2 − 9x + 13 (x, y) = ( ? ) (smaller x-value) (x, y)

82. ## calculus

Question 1: Experimentally it is found that a 6 kg weight stretches a certain spring 6 cm. If the weight is pulled 4 cm below the equilibrium position and released: a. Set up the differential equation and associated conditions describing the motion. b.

83. ## calculus

Differentiate. y= (cos x)^x u= cos x du= -sin x dx ln y = ln(cos x)^x ln y = x ln(cos x) (dy/dx)/(y)= ln(cos x) (dy/dx)= y ln(cos x) = (cos x)^x * (ln cos x) (dx/du)= x(cos x)^(x-1) * (-sin x) = - x sin(x)cos^(x-1)(x) (dy/dx)-(dx/du)=

84. ## Chemistry

A student titrates 0.025 M KOH into 50.00 ml of a solution of unknown weak acid HA. Equivalence point is reached when 30.00 ml of the KOH has been added. After 15.00ml of the KOH has been added the pH of the mixture is 3.92. A. What is the concentration of

85. ## physics

Two capacitors, identical except for the dielectric material between their plates, are connected in parallel. One has a material with a material with a dielectric constant of 2, while the other has a material with a dielectric constant of 3. What is the

86. ## Physics

The density of a 4.41-m long rod can be described by the linear density function λ(x) = 111 g/m + 12.3x g/m2. One end of the rod is positioned at x = 0 and the other at x = 4.41 m. found total mass of rod to be: 609 grams need help finding : the

87. ## chemistry

A certain volume of a gas at 298k is heated such that its volume and pressure are now four times thier original value. What is the new temperature?

88. ## Physics

(a) Find the speed of a satellite moving around the earth in a circular orbit that has a radius equal to six times the earth's radius of 6.38 x 10^6 m. (b) Find the satellite's orbital period.

89. ## Math

if triangle ABC is equilateral with AB = 2x, BC = 4x - 7, and x + 3.5, then what is x?

90. ## Fluid mechanics

Calculate the predicted viscosity of molecular oxygen, nitrogen and methane at 20°C and standard atmospheric pressure (give your answer in Pas).

91. ## Algebra Help

Identify coefficients and the degrees of each term polynomial, and then find the degree of each polynomial. a^3b^8c^2 - c^22 + a^5c^10

92. ## Physics

A net force of 1.6×10^−15 N acts on an electron over a displacement of 5.0 cm, in the same direction as the net force. What is the change in kinetic energy of the electron?

93. ## Math CONTINUATION OF QUESTION FROM bobpursley

Thank you for answering the question before bobpursley, I understand how you did the deriv of inside, outside, but how do I now do the second derivative since you have the extra -18x^2 in the numerator?? Thank you very much! (I suppose I have to brush up

94. ## pre algebra

my grade is 83.17 in pre algebra in college, but the final exam is worth 300 points. If I got a B or B- or a C on the final, what would my grade be overall?

95. ## physics

A 3.3 kg bucket of water is raised from a well by a rope. If the upward acceleration of the bucket is 4.2 m/s2, find the force exerted by the rope on the bucket of water

96. ## science

what is the difference between a physical change and a chemical reaction

97. ## Math

Mrs Sue thank you and you are the best

98. ## chem

when a chemical reaction takes place, the number of atoms of each element in the reactants (blank) the number of atoms of each element in the products

99. ## pre algebra

solve for h: A=1/2bh

100. ## math

. Two groups of students are using a dynamic geometry software program to investigate the properties of quadrilaterals. The first group has concluded that the diagonals of a quadrilateral always bisect each other. The second group of students is not

101. ## physics

A siren is producing a tone of frequency 10000 Hz, and a handheld decibel meter (like the one I use in class) is reading 20 dB. We've talked in class about how your perception of qualitative loudness (in phons) does not always match exactly with the meter.

102. ## chemistry

calculate the ph of a solution by addition of 0.1 mL of 0.5m hcl to 50.0 ml pure water. I'm supposed to use c1v1=c2v2... but I did 0.1/50ml=0.002.... 0.002x0.5.. then -log the answer and got 3 for a ph is it right?

103. ## chemistry

find the number of grams of ice, at 0 degrees celcius that could be melted by the addition of 3.6 kilojoules of heat.

104. ## Algebra 2

Subtract. Simplify by removing a factor of 1 when possible. (9p^b)/p^2-b^2 - p-b/p+b. Thank you. These problems, I don't understand at all. I'm sorry.

105. ## chemistry

how many grams of manganese (4) oxide are needed to make 5.6 liters of a 2.1 solution

106. ## Algebra

Simplify 12n to 5th power/36n

107. ## Algebra

Laura has a roll of ribbon. There are 20 yards of ribbon on the roll. What equation can Laura use to find the number of inches of ribbon on the roll

108. ## PHYSICS

How much work is done by the Moon's gravitational field as a 1005 kg meteor comes in from outer space and impacts on the Moon's surface? PLEASEEEEEEEEEE

109. ## grammar

Getting an education will help with financial planning.

110. ## Future story Part 2

Life is so perfect, my hard work and effort has brought me to the occupation I had dreamed of becoming. My desire was to become a Pharmacist, and only post secondary education has brought me to this stage. If it wasn’t for post secondary education, I

111. ## Chemistry

Assume that it is necessary to determine the [Fe3+] in a solution that may be in the .0001 to .0005 M range. Outline a spectrophotometric method that would accurately give the required data?

112. ## physics

A person notices a mild shock if the current along a path through the thumb and index finger of one hand exceeds 80 ìA. In volts, calculate the maximum allowable potential for a hand with moist skin with a resistance of 67.7 kÙ. please help i am getting

113. ## Introductory technology

A triangle whose two sides are equal is known as

114. ## differential equation

A 0.25 kg mass is horizontally attached to a spring with a stiffness 4 N/m. The damping constant b for the system is 1 N-sec/m. If the mass is displaced 0.5 m to the left and given an initial velocity of 1 m/sec to the left, find the equation of motion.

115. ## Calculus

Find d^2x/dt^2 as a function of x if dx/dt=4xcosx.

116. ## math

If 5/8 of the apples are red,and the rest of the apples are green,what fraction of the apples are green?

117. ## chemistry

what is the entropy change that occurs when 500g of water ice melts at 0 degrees celsius and 1 atm. the heat of fusin for water ice under these conditions is 6.01 Kj/mol.

118. ## Physics

The coil used to measure the movements of a blowfly as described having a diameter of 2 mm, in addition the blowfly is immersed in a magnetic field of magnitude .15 mT. Find the maximum magnetic flux of one of the coils?

119. ## English

What does she look like? 1. She looks like a movie star. 2. She is tall. 3. She looks like a bear. 4. She is beautiful. 5. She is reserved. (Are the answers all correct? What are suitable responses to the question? Would you add some more suitable answers?

120. ## Philosophy

Explain the similarities and differences of Plato and Aristotle concerning body and soul.

121. ## frequency

For sound waves in room-temperature air, is it possible to change the wavelength of a sound without changing the frequency?

122. ## differential equation

A simple pendulum of length l, is oscillating through a small angle theta, in a medium for which the resistance is proportional to the velocity. Obtain the differential equation of its motion and discuss the motion

123. ## Geometry

The length of the median of a trapizoid is 7 centimeters. The bases are 2x+4 and 8x-50. Find x.

124. ## English

Please checka nd correct fr any errors. Read Johnson vs. Ralston We have received medical information from Midvale Clinic and copies of all the documents we received are enclosed. We received nothing from Dr. Vest and the only items we received from Dr.

125. ## physics

Suppose a person is going to be exposed to a steady tone of frequency 8000 Hz all night (perhaps arising from noisy electronics in a nearby room. ) If this person wants their perceived room loudness level to be a very quiet 10 phon (in order to sleep

126. ## chemistry

What mass of NaCl can be dissolved in 250 g of water at 20 degrees C?

127. ## chemistry

A sample of helium gas has a volume of 325L at 25C and at 5atm. At what temperature the gas can be compressed at 50atm to a volume of 125L?

128. ## English

I forgot to include these last two sentences. Thank you very much. 1.It fostered individualism, and wasn’t concerned with abstractions such as social justice, equality or fraternity. 2) Liberal thought influenced the new view of the world and affirmed

129. ## chemistry

When the following equation is balanced the coefficient of CaO is ... CaO + P4O10 > Ca3(PO4)2

130. ## English 1

Journal Activity 2.1 A: Prewriting: What Makes a Good Story write an evaluative essay in your journal. In this essay you'll state your opinion of a short story from this textbook or a movie you've seen and then support your opinion. You'll write down your

131. ## Algebra

Identify coefficients and the degrees of each term polynomial, and then find the degree of each polynomial. a^3b^8c^2 - c^22 + a^5c^10

132. ## appling middle

If the data were displayed in a circle graph, what percent of the graph would represent the seventh grade? Enrollment is Sixth grade 64, Seventh grade 64, and Eighth grade is 70

133. ## Science

calculate the amount of fructose 6 phosphate formed from glucose 6 phosphate in a 10 milliliter incubation system if 0.5M G6P is incubated overnight at 25C and the equilibrium constant is 0.67.

134. ## physics

A siren is producing a tone of frequency 10000 Hz, and a handheld decibel meter (like the one I use in class) is reading 20 dB. We've talked in class about how your perception of qualitative loudness (in phons) does not always match exactly with the meter.

136. ## Instrumental

A complex was formed between Ni (II) and 1-cyclopentene-1-dithiocarboxylic acid (CDA). The measurements were made at 530 nm in 1.00-cm cell. Find the formula of the complex. C(CDA)=1.00x10^-3 C(Ni)-1.00x10^-3

137. ## Math

What is the first and second derivative of 3/(1+2(x^3)) ? im tempted to do the quotient rule, but this looks weird to me...any advice would be greatly appreciated!!

138. ## maths

The probabilities of a student getting grade A, B, C and D are 0.2, 0.3, 0.15 and 0.35 respectively. Then the probability that the student gets 1) At least C grade is __________ 2) At most C grade is ___________

140. ## calculus

Find the area of the region bounded by the graphs f(x)=sqrt(3x)+1, g(x)=x+1

141. ## math

In a movie theater, theater A has 30 seats in the first row. Each next row has 4 more seats in it than in the previous row has. 1) How many seats are in the 4th row?Explain. 2) Is there a row with exactly 60 seats in it? Explain. 3) Theater B has 40 seats

142. ## hcs/341

What employment laws have the most effect on health care organizations? Why?

143. ## pre algebra

Solve for P: I=prt

144. ## Stats 330- HELP

I need some help on this question it has two parts but i can't figure it out. Can someone help me. The NDSU library checks out an average of 320 books per day, with a standard deviation of 75 books. Suppose a simple random sample of 30 days is selected for

145. ## Chemistry

I don't understand how you know what state designation things are in a chemical equation. For example this is given: 2 (NH4)3PO4 (__) + 3 Ba(NO3)2 ---> Ba3(PO4)2 (__) + 6 NH4NO3 (__) How do you just know what to put for their state or phase designation?

146. ## elem alg

On a certain test, the student gets 3 points for each correct answer and loses 2 points for each incorrect answer. The test has 37 questions total. (no question can be lfet blank.) If x is the number of answers a students gets correct, write and express

147. ## geomagnetism

what are the effects of geomagnetism to health? and how it can be prevented. The situation is "we off our main power because we fix one of our outlet, then after we fix it we up one of our appliances but the said appliance is functioning even if no

148. ## chemistry 32

Calculate the concentration, in molarity, of a solutiion prepared by adding 9 mL of water to 1mL of 0.1 M of HCl

149. ## geometry

Find the area of the region between a square and an inscribed circle, when the square has a side length of 6 in.

150. ## English

Hello. I will really appreciate your help. 1)which preposition is correct or better in the sentence "oil is a curse of/for the Middle East" 2)is it possible to ommit "that/which" in the sentence "this is a fundamental right 'that (which)' every state must

151. ## chemistry

An element X burns in air to form an oxide. When the oxide is shaken in water, the resulting solution has a pH greater than 7. What could the element be?

152. ## chemistry

what mass of KOH is reqired to react completely with 2.70g of H2So4 to produce K2S04 and water?

A 12.1 g CD with a radius of 6.16 cm rotates with an angular speed of 31.1 rad/s. What is its kinetic energy?

154. ## English

Please check for any errors. Correc them for me and I would appreciate it. Thank you for your interest in Rogers Video Theater. I am enclosing a copy of the leased agreement. The \$1695.00 unit can be leased for \$98.00 a month for 24 months. The first and

155. ## calculus

Write the equation of the tangent line to the curve at the indicated point. As a check, graph both the function and the tangent line. f(x) = x7 − 7 at x = −1 7 x7

156. ## Literature

I need to list 6 main characteristics of British Romantic literature. Any ideas? I'd appreciate any help. Thanks.

157. ## maths

a box is to be made from the piece of cardboard at right, where square corners of side x are to be cut out, and sides folded up, and top enclosed. Find the possible heights x of the sides when the volume of the box is 10, within the interval of length 1

158. ## math

If 7/12 of the coins are pennies,and the other coins are dimes,what fraction of the coins are dimes?

159. ## physics

9-Volt battery is used to charge a 375 mF capacitor over a 147 Ù resistance. How many seconds will it take for the capacitor to reach 75% of its maximum charge? Hint: The equation below represents the charge of a charging capacitor as a function of time Q

160. ## geometry

Could we multiply the following dimensions 9yards x 6 yards x 3 yards and then convert the final answer into cubic feet?

161. ## English

These are a few sentences on the Augustan Age I'd like you to check. I'm unsure about punctuation and word choice. 1. The 18th century England was called Augustan after the period of Roman history which had achieved political stability and power as well as

162. ## physics

Find the density of a substance whose mass is 28 grams and whose volume is 4 cubic centimeters

163. ## Physics

Some spacecraft design uses a solar sail made of aluminized plastic. As sunlight reflects off the sail, radiation pressure drives the spacecraft outward away from the sun. a. If the sail material has a density of 600.0 kg/m3, what is the maximum thickness

164. ## student civics

why are gay guys given less of a chance then strate guys in a goverment court.

165. ## English

I just need to know if zapping, channel surfing are synonyms, if subscribe is followed by to, and if propose could be followed the indirect object. I included a few more sentences I really don't know if they are possible. 1) I hate people zapping (channel

166. ## CRIMINOLOGY

Are property criminals and enterprise criminals extremely diligent rather than lazy?

167. ## CALCULUS

hi what is the derivativ of [-18(x^2)]/[(1+2(X^3))^2] ?? thanks!~

168. ## calculus

At the indicated point for the function, find the following. A graphing utility's numerical derivative feature can be used to check your work. y = (x3 + 2x)3 at x = 3 (a) Find the slope of the tangent line. (b) Find the instantaneous rate of change of the

169. ## physics

A hot-air balloon is ascending at the rate of 11 m/s and is 51 m above the ground when a package is dropped over the side. (a) How long does the package take to reach the ground? (b) With what speed does it hit the ground?

170. ## Alegebra 1

If all the vertices of a triangle are on the circle and one side of the triangle is the diameter of the circle it is a right angle. Find the length of the diameter (AC) if Ab =8 and BC = 15.

171. ## Math

Does anyone know the old formula to calculate a hourly raise from a percentage; I totally forgot. The employee makes \$10.50 an hour and is receiving a 1.1% increase.

172. ## physics

On a dry road, a car with good tires may be able to brake with a constant deceleration of 3.31 m/s2. (a) How long does such a car, initially traveling at 28.2 m/s, take to stop? (b) How far does it travel in this time?

173. ## SCIENCE

WHAT IS PRESSURE EXERTED OUTWARDLY IN A CYCLINDER THAT HAS ONE END CLOSED AND THE OTHER OPEN WHEN AN INTERNAL HEAT SOURCE RAISES THE TEMPERATURE FROM 70 DEGREE F TO 300 DEGREE F IF THE CYCLINDER IS 48 INCHES DIAMETER AND 240 INCHES LONG

174. ## trig

if than of theta is greater than zero and cos of theta is greater than zero what quadrant is theta in?

175. ## Heptic Sinusoid

What's the function of the heptic sinusoid? I've tried googling but I can't seem to find much on it.

176. ## Science

Do you agree or disagree with the following quote: "The most important factor influencing learning is what the learner already knows"? Why?

177. ## world history Islamic Expansion

IBN BATTUTA’S PRAISE FOR THE GOOD MUSLIMS OF MALI, 1352 HONESTY “They do not interfere with the property of the white man who dies in their country even though it may consist of great wealth, but rather, they entrust it to the hand of someone

178. ## Dooley

how do i solve the inequality of 26s is less than or equal to 3s + 69

179. ## Writing

If I had lacked a clear beginning,middle and end as well as weak and limited transitions.in which ares my essay will be weak

180. ## calculus

Consider the following. y = (2x2 + 5)(x3 − 25x) at (5, 0) (a) At the indicated point, find the slope of the tangent line. (b) Find the instantaneous rate of change of the function.

181. ## calculus

Consider the following. y = x2 − 9x x2 + 5x at (3, − 3 4 ) (a) At the indicated point, find the slope of the tangent line. (b) At the indicated point, find the instantaneous rate of change of the function.

182. ## world geography

What geographic advantages does France and Germany have in common that would cause them to prosper?

183. ## PHY

A car is driven east for a distance of 43 km, then north for 25 km, and then in a direction 26° east of north for 26 km. Determine (a) the magnitude (in km) of the car's total displacement from its starting point and (b) the angle (from east) of the car's

184. ## Algebra 11

Subtract. Simplify if possible. v-7/v-2v-9/5v. Thank you for your help.

185. ## chemistry

how many molecules of water in order to produce 37 grams of oxgen? give me the Formula

186. ## Science

The weather forecast is for warmer air and lower air pressure. What other change would you expect? a. Higher humidity b. strong winds c. Lower humidity d. Violent winds. I think the answer is f, but I am not sure.

187. ## algebra 2

Solve esch system by substitution. 3c+2d=2 d=4

188. ## chemistry

what is the molarity of 40g in 0.5L of solution. Molecular weight of substance is 100.09g/mole.

189. ## trig

if sin of theta is less than zero and cos of theta is greater than zero what quadrant is theta in?

190. ## literature

determine the optimum preventive maintenance frrequency for each of the pieces of equipment if breakdown time is normally distributed

192. ## Trig

Given that theta is a quadrant 3 angle with cos of theta=-7radical65/65, determine tan of theta

193. ## arithmetic

Given that an arithmetic sequence has a common difference of 5 and sum of the first 10 terms is 245, the first term is?

194. ## English

Explain why rhythm and rhyme are used in epic poetry.

195. ## differential equation or physics

A particle moves on the x-axis with an acceleration, a=(6t-4)m/s2. Find the position and velocity of the particle at t=3 , if the particle is at origin and has a velocity of 10 m/s ms when t=0.

196. ## chemistry

What is the principle source of Caffeine? I cannot find it at all!!

197. ## MATH HELPP!!

FRANCIS PACKED A BAG FOR HER VACATION.SHE TOOK 4 T SHIRTS,2 SWEATERS, 3 PAIRS OF JEANS, HOW MANY COMBINATIONS OF 3 COULD SHE MAKE USING EACH ITEM ONCE.MAKE A TREE DIAGRAM ---->>> THNX!!

198. ## calculus

x=15cm and y=20cm,what is the length of z

199. ## World History

topic: islamic expansion BN BATTUTA’S PRAISE FOR THE GOOD MUSLIMS OF MALI, 1352 HONESTY “They do not interfere with the property of the white man who dies in their country even though it may consist of great wealth, but rather, they entrust it to the

200. ## Chemistry 12

Will a precipitate form if equal volumes of 0.22 M NH4NO3 and 0.22 M KBr are combined? Explain.

201. ## maths

The probability of getting a blue ball is 2/3 from a bag containing 6 blue and 3 red balls. 12 red balls are added to the bag then find the probability of getting a blue ball

202. ## geometry

If side b=4 inches, side c=12 inches find side a. Show all work and round to the nearest tenth

203. ## math

Determine f′(2) for f (x) = g[h(x)], given g(2) = 5, g′(2) = -3, g′(-6) = -3, h(2) = -6, and h′(2) = 4.

The perimeter of Olivias rectangle is 50% as long as Janets.What is the perimeterof Olivias rectangle?

205. ## English - Native speakers

Ok one more thing about quantifiers :D Can you help me and tell me which of the following sentences are correct in both ways: 1.I have no/I don't have any time - is both possible? 2.He works a lot/much 3.There are too much or to many people? I think 1 and

206. ## math

find the perimeter of a triangle if one side is 28 feet , another side is four-ninth the perimeter , and the third side is two-fifth the perimeter.

207. ## English

Can you please check if these sentences are correct? Thank you. 1) The witches are unable to distinguish between opposites. For them fair is foul and foul is fair. 2)They are able to predict the future and are generally associated with the devil. 3) First,

208. ## science

heat and sound products electric and heat products kinetic and heat products ex.electric and sound ipod mp3 wii laptop tv please help!

209. ## humanities - english

In the play Oedipus Rex, from the beginning of Oedipus's rule in Thebes through the end where i he exiles himself, how does the relationship with the gods with the people in Thebes change, beginning, middle and end.

210. ## Algebra

Multiply polynomials (n^3+8)(n-4)

211. ## physics

How to you get to 1.378? Which is the answer> what calculations do you make? Your niece is working on a unique science fair project - a clock built around a small mass vibrating on a little spring. Her prototype version is working ok, but it's running too

212. ## Math

(5-2t^3)^2 I came up with this answer: = (-2t^3 +5) ^2 is it correct?

213. ## MATH

What is the second derivative of 3/(1+2(x^3)) ? im tempted to do the quotient rule, but this looks weird to me...any advice would be greatly appreciated!!

214. ## World History

What events led up to the cold war? I have this so far please tell me what i need to add, I need real events... The u.s and britan tried to counter russia's manipulation of eastern Europe. In 1945 the U.s developed the atomic bomb. in 1947, the u.s

215. ## English

Please check for any type of errors. And corect them for me. Thanks!! RE: Evans vs. Brown I tried to call you about the above case, but learned that you were out of town and would not return until Wednesday. You wrote to me on June 1 to ask what authority

216. ## World History

what did the fascists and natizes advocate and how did they govern their states? (20th century)

217. ## English

I’m having problems in paraphrasing the song “Never Ever” by All Saints. Can you check it, please? I included a sentence on the use of “propose” and one concerning the use of reflexive pronouns. 1) Storm is a bit ashamed of herself. She feels

218. ## Math Factorization

2xsquare - 11x + 5 = 0

219. ## Math

how could you find the measurements of the frame with a 16 inch perimeter antd the greatest possible area?

220. ## all

how can a pkan ofaction help youadddress a current problem or challlenge you are having in school?

221. ## health

What is the role of administrative agencies in the current health care environment?

222. ## Finance

A U.S. Firm wants to raise \$10 million of capital so it can invest in new technology. How much will it need to raise in order to net \$10 million, using the average costs of raising funds.

223. ## chemistry

How many moles of argon gas are present in 70L of volume with a pressure of 180atm at 21C?

224. ## Algrebra

simplify 12n to first power/36n

225. ## English

I just need to know if the verb “prophesy” can be follow by to (ex. to Macbeth), if “army” is considered as a collective noun (plural), if the word devil is used with the definitive article and if the expression “to be born by “ is correct. I

226. ## gr 10 math

calculate the interest earned in 1 year on \$2000 at 7%.

227. ## chemistry

How many grams of calcium nitrate,

228. ## physics

how much should a ramp rise over 10 meters of run for an angle of 12 degrees

229. ## calc

hi what is the derivativ of [-18(x^2)]/[(1+2(X^3))^2] ?? thanks!~

230. ## English

Imagine you are a working mother of 3 children who has experienced inequity in the workplace regarding pay and conditions. Write a letter to the editor of a newspaper supporting the article. Select 10 words from the spelling list: maternity, crippling,

231. ## english

Write THREE statements in which you commit the either/or fallacy.

232. ## English

When the government issued the Susan B. Anthony, dollar coin on July 2,1979 it met with some disapproval.

233. ## Algebra 2

Subtract. Simplify if possible. (2-v)/v-5-(3v-5)/5-v Thank you all for all your help. It is gratefully appreciated.

234. ## calculus

let f(x) = Sec (x) in the interval 0

235. ## algebra

-2 -9 1 4 How do you Simplify

236. ## English

I forgot to include these last two sentences. I hope you can look at them. 1) Macduff wasn't born to a woman (I mean naturally) since he was torn from his mother's womb. 2) My favourite programme is called “Year zero” and is broadcast on TV every

237. ## Science

What would damage a cliff in 6 weeks badly ?

238. ## Story about my future Part 2

Could you please check to see if it covers all these factors. - cost of living on your own -factors that add to your achievement in the workplace -educational attainment and earning potential -current skills and talents and your future route

239. ## English

I forgot to include the following sentences. 1) I hate people zapping (channel surfing, channel-hopping) when watching TV. 2)We bought a Freeview box an a satellite dish to watch (free) satellite channels around the world. 3) We also subscribed (?) to Sky

240. ## Religion

Do Mennonites participate in raffles?

241. ## pre algebra

how would you solve 3xy6^2/6xy of the two fractions? 4y / 5

242. ## eth125

what are credible resources about bilingualism and education,and politics in the United States.

243. ## math

Jeff is thinking of a function machine.He says that the output is 5 when the input is 4.What are two different rules that he could be thinking of.

244. ## math

3/5x+2 + 5x/25x2 - 4

245. ## Science

What would damage a cliff badly to make i look as if it lost a piece of itself inf weeks.

The area of Walters rectangle is 3/4 the area of Janets.What is the area of Walters rectangle? The area of Janets rectangle is 24in.

247. ## math

differentiate b) g(x) = (8x^2 - 3x)^3