# Questions Asked onApril 15, 2010

1. ## Math

A boat is sailing due east parallel to the shoreline at a speed of 10 miles per hour. At a given time the bearing to the lighthouse is S 70 degrees E, and 15 minutes later the bearing is S 63 degrees E. Find the distance from the boat to the shoreline if

2. ## geometry

A tourist in France wants to visit 5 different cities. If the route is randomly selected, what is the probability that she will visit the cities in alphabetical order? Answer choice: a)120 b)1/5 c)1/120 d)1/25

3. ## math

Centered 6 meters above the ground, a Ferris wheel of radius 5 meters rotates at 1 degree per second. Assuming that Jamie’s ride begins at the lowest point on the wheel, find how far Jamie is above the ground after 29 seconds; after 331 seconds; after t

4. ## geometry

The lengths of segments PQ and PR are 8 inches and 5 inches, respectively, and they make a 60-degree angle at P. (a) Find the area of triangle PQR. (b) Find the length of the projection of segment PQ onto segment PR. (c) Find the length of segment QR.

5. ## Osciallations

You pull a simple pendulum of length 0.237m to the side through an angle of 3.50 degrees and release it. How much time does it take the pendulum bob to reach its highest speed? Take free fall acceleration to be = 9.80 . How much time does it take if the

6. ## Physics

A speed boat at rest begins to move in a straight line from a dock. The boat has a constant acceleration of +3.0 m/s squared. Attached to the dock is a siren that is producing a 755 Hz tone. If the air temperature is 20 degrees C, what is the frequency of

7. ## Physics

In 2000, NASA placed a satellite in orbit around an asteroid. Consider a spherical asteroid with a mass of 1.00×1016 and a radius of 8.50 . What is the speed of a satellite orbiting 4.70km above the surface? What is the escape speed from the asteroid?

8. ## Physics

Two 0.20 g metal spheres are hung from a common point by non-conducting threads that are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle between the threads is 20 degrees. How much charge was

9. ## geometry

11. Infinitely many different sectors can be cut from a circular piece of paper with a 12-cm radius, and any such sector can be fashioned into a paper cone with a 12-cm slant height. (a) Show that the volume of the cone produced by the 180-degree sector is

10. ## geometry

HELP.... In a certain lottery, 3 numbers between 1 and 9 inclusive are drawn. These are the winning numbers. How many different selections are possible? Assume the order in which the numbers are drawn is not important. Answer choice: a.) 6 b) 84 c) 504 d)

11. ## Physics

It can be shown that for a uniform sphere the force of gravity at a point inside the sphere depends only on the mass closer to the center than that point. The net force of gravity due to points outside the radius of the point cancels. How far would you

12. ## Math

What numbers can be expressed as an alternating-sum of an increasing sequence of powers of 2 ? To form such a sum, choose a subset of the sequence 1, 2, 4, 8, 16, 32, 64, . . . (these are the powers of 2). List the numbers in that subset in increasing

13. ## chemistry check my work

C7H6O3+CH3OH→C8H8O3+H2O In any experiment, 1.50g of salicyclic acid is reacted with 11.20g of methanol. The yield of methyl salicylate, C8H8O3, is 1.31g. What is the percent yield? percent is 77.l1% is this correct?

14. ## geometry

How many 5 card poker hands consisting of 3 aces and 2 kings are possible with an ordinary 52-card deck? Answer choice: a).12 b).288 c).6 d).24 I got 24 is that correct?

15. ## math

Find the number of subsets of the given set. {math, English, history, science, art} Is this correct: 1. {} 2. {math} 3. {English} 4. {history} 5. {science} 6. {art} 7. {m, E} 8. {m,h} 9. {m, s} 10. {m, a} 11. {e, h} 12. {e, s} 13. {e, a} 14. {h, s) 15. {h,

16. ## Trigonometry

How do I find the value of sin(a-b) if tana=4/3, cotb=5/12, 0

A foam ball of a mass of 0.150 g carries a charge of -2.00 nC. The ball is in a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction of the electric field?

18. ## physics

How far would you have to drill into the Earth, to reach a point where your weight is reduced by 8.0 ? Approximate the Earth as a uniform sphere.

19. ## math

How do you make a w made of 4 pens into a perfect square by only moving one pen

20. ## Math

Find an equation for the ellipse. center:(3,2) a=3c Foci:(1,2)(5,2) h=3 k=2 I do not know where to start.

21. ## math

Vernon Wells hits a baseball that travels for 142m before it lands. The flight of the ball can be modelled by a quadratic function in which x is the horizontal distance the ball has travelled away from vernon, and h(x) is the height of ther ball at that

22. ## another physics problem that i dont understnad..

An 58.0 N box of clothes is pulled 5.2 m up a 30.0° ramp by a force of 95 N that points along the ramp. If the coefficient of kinetic friction between the box and the ramp is 0.22, calculate the change in the box's kinetic energy.

23. ## Math analysis

How do I simplify cscx-cotxcosx?

24. ## Chemistry

How many grams of sodium nitrate, NaNO3 are needed to make 250 ml of .500 M solution? MM of NaNO3 is 85 g/mol?? I'm not sure which equation to use, help please?

25. ## physics

A stone is dropped into a deep canyon and is heard to strike the bottom 15s after release. How deep is the canyon? The speed of sound waves in air is 343 m/s and the acceleration of gravity is 9.8m/s^2. Answer in units of m.

26. ## physics

The average lifetime of muons at rest is 2.20 us. A laboratory measurement on muons traveling in a beam emerging from a particle accelerator yields an average muon lifetime of 19.668 us. What is the speed of the muons in the laboratory?

27. ## Osciallations

A partridge of mass 5.01kg is suspended from a pear tree by an ideal spring of negligible mass. When the partridge is pulled down 0.100 m below its equilibrium position and released, it vibrates with a period of 4.20s . What is its speed as it passes

28. ## College Chemistry

Consider the evaporation of methanol at 25.0 C: CH3OH(l)--->CH3OH(g) Delta G= 4.3 kJ Find Delta G at 25.0 C under the following nonstandard conditions: Pressure of CH3OH= 108.0 mmHg.

29. ## Calculate the oscillation frequency f of the H2 mo

When displaced from equilibrium by a small amount, the two hydrogen atoms in an \rm H_{2} molecule are acted on by a restoring force F_{x}=-k_1 x with k_1 = 510 N/m. Calculate the oscillation frequency f of the H2 molecule. Use m_eff = m/2 as the

30. ## Math

so confused on this. I have answered but want someone to check me. Identify the distribution as symmetric, left-skewed, or right skewed. 1. exam scores for an exam in which most students did well, but a few students failed. Answer: Left Skewed 2. Amount of

31. ## calculus

Two roads intersect at an angle of 48º. A car and truck collide at the intersection, and then leave the scene of the accident. The car travels at 100 km h down one road, while the truck goes 80 km h down the other road. Fifteen minutes after the accident,

A ball of mass 522 g starts at rest and slides down a frictionless track, as shown below. It leaves the track horizontally, striking the ground a distance x = 0.93 m from the end of the track after falling a vertical distance h2 = 1.18 m from the end of

33. ## physics!!

A flight attendant pulls her 70.0 N flight bag a distance of 263 m along a level airport floor at a constant speed. The force she exerts is 41.0 N at an angle of 52.0° above the horizontal. (b) Find the work done by the force of friction on the flight

34. ## math

How many 5 card poker hands consisting of 3 aces and 2 kings are possible with an ordinary 52-card deck? Answer choice: a).12 b).288 c).6 d).24 I got 24 is that correct?

35. ## last physics problem!

A ball of mass 522 g starts at rest and slides down a frictionless track, as shown below. It leaves the track horizontally, striking the ground a distance x = 0.93 m from the end of the track after falling a vertical distance h2 = 1.18 m from the end of

the playground at a daycare center has a triangular-shaped sandbox. Tow of the sides measure 20 feet and 14.5 feet and form and included angle of 45 degree. Find the length and the third side of the sandbox to the nearest tenth of a foot.

37. ## biology

Which of the following is true about the relationship between energy and chemical reactions? Activation energy is required for a chemical reaction to occur. Activitation energy is not necessary in a chemical reaction which releases energy. Chemical bonds

38. ## chemistry

2. Methanol, CH3OH, is used as fuel in race cars. This liquid fuel can be synthesized using the following process C(s)+ ½ O2(g) + 2H2(g)  CH3OH(l) Calculate delta G using the deta Gf of the reaction. Calculate Kp. What is the relation between the

39. ## geometry

There are two noncongruent triangles that have a 9-inch side, a 10-inch side, and that enclose 36 square inches of area. Find the length of the third side in each of these triangles.

40. ## Geometry

A sphere consists of all the points that are 5 units from its center (2, 3,−6). Write an equation that describes this sphere. Does the sphere intersect the xy-plane? Explain.

41. ## english

Which of the following sentences best represents culturally unbiased writing?

42. ## science

How do plants vary in their efficiency at producing joules for human consumption?

A flight attendant pulls her 70.0 N flight bag a distance of 263 m along a level airport floor at a constant speed. The force she exerts is 41.0 N at an angle of 52.0° above the horizontal. (a) Find the work she does on the flight bag. (b) Find the work

44. ## calculus

Three ships are at points P, Q, and R such that PQ=2km PR=7 km, and

45. ## Chemistry

When a sample of PCl5(g) (0.02087 mol/L) is placed in 83.00 L reaction vessel at 491.0 °C and allowed to come to equilibrium the mixture contains 103.0 grams of PCl3(g). What is the equilibrium concentration (mol/L) of Cl2(g)? PCl5(g) = PCl3(g)+Cl2(g)

46. ## Chemistry

Hydrogen peroxide, H2O2, solution can be purchased in drug stores and used as an antiseptic. A sample of such a solution weighing 1.00 grams was acidified with sulfuric acid and titrated with .02000 M solution of KMnO4. The unbalanced reaction is H2O2(aq)

47. ## home economics

uses of computer in home economics

48. ## Algebra

A ¡§lattice point¡¨ has integer coordinates. Then, A = (m, n) is a lattice point if both m and n are integers. Let¡¦s call a point P = (x, y) ¡§generic¡¦¡¦ if all the distances from P to lattice points are different. With some algebraic work, I

49. ## Physics

A boat is rowed due North at 7.0 km/h directly across a river that flows due East at 4.0 km/h. Find the boat's resultant speed.

50. ## physics

a cell membrane is 70 angstrom (A)unit thick if angstrom unit is o.1nm what is the membrane thickness in a. meter b. micrometers

51. ## math

how much fencing is needed to close a circular garden whose radius is 4.5

52. ## Phsyics

The center of a 1.10km diameter spherical pocket of oil is 1.10km beneath the Earth's surface. Estimate by what percentage directly above the pocket of oil would differ from the expected value of for a uniform Earth? Assume the density of oil is . Express

53. ## Physics

If a 5.40g bullet is fired horizontally into a suspended(hanging)10kg block of wood and causes the block, with bullet embedded, to move off with horizontal velocity of 0.30m/s, What is the impact velocity of the bullet?

54. ## stats

A human resources manager at a large company wants to estimate the proportion of employees that would be interested in reimbursement for college courses. If she wishes to be 95% confident that her estimate is within 5% of the true proportion, how many

55. ## geometry

the scale factor of 2 similar polygons is 2:3. The perimeter of the larger one is 150 centimeters, what is the parameter of the smaller one

56. ## CHEM

given the general chemical equation, A yields 3C + D , a. how many moles of C can be produced from one mole of A? b. how many moles of D can be produced from four moles of A?

57. ## Integers

Suppose a1, a2, . . . , an is a list of n numbers with the following properties: The sum of those n numbers is 500. The sum of the smallest three of those numbers is 48. The sum of the largest two of those numbers is 35. (Note: There might be some

58. ## Chemistry

Maleic acid is an organic compound composed of 41.39% C, 3.47% H, and the rest oxygen. If 0.271 mol of maleic acid has a mass of 31.4 g, what are the empirical and molecular formulas of maleic acid? My work: C: 41.39 g x (1 mol/12.01 g) = 3.44629 = 1 H:

59. ## PHYSICS Gr.11

A bicycle of mass 14.6 kg and a rider of mass 50kg generate a net force of 12N.How fast are they going after 2.0 seconds?

60. ## oscillation

An object with mass 0.250 kg is acted on by an elastic restoring force with force constant 10.8 N/m. The object is set into oscillation with an initial potential energy of 0.150 J and an initial kinetic energy of 6.00×10−2 J. What is the amplitude of

61. ## physics

A bicycle of mass 14.6 kg and a rider of mass 50kg generate a net force of 12N.How fast are they going after 2.0 seconds?

62. ## PHYSICS Gr. 11

A of car of mass 2000 kg has a force forward due to the engine of 4500N and experiences an air resistance of 1500N. IF we ignore the friction with the road, what is the acceleration of this car? thanx :)

63. ## physics

A 2.40 kg object is hanging from the end of a vertical spring. The spring constant is 53.0 N/m. The object is pulled 0.200 m downward and released from rest. Complete the table below by calculating the translational kinetic energy, the gravitational

64. ## physics

A bicycle of mass 14.6 kg and a rider of mass 50kg generate a net force of 12N.How fast are they going after 2.0 seconds?

65. ## GCF Math Check

Can you see if my answers are correct? Directions find the GCF: (I did the factor tree for each) 40; 2^3 times 5 128; 2^7 GCF: 2 90; 3^2 times 2 times 5 105; 5 times 3 times 7 180; 3^2 times 2^2 times 5 GCF: 5 3x^3; what is that suppose to be 6x; 2 times 3

66. ## biology

Carbohydrates and lipids have many carbon-hydrogen bonds; therefore, they both store energy in these bonds. are easily dissolved in water. dissolve only in vinegar. exist only in cells of plants.

67. ## English

Why does Daisy cry over Gatsby's shirts in the "The Great Gatsby" when he is showing her his house. Is there any significance?

68. ## math

translate to an algebraic expression the product of 27% of some number

69. ## physics

A thin cylinder of copper has a mass m=50g and is 1 meter long. what is the minimum current that has to flow through the cylinder for it to levitate in a magnetic field of 0.1T. would i use B=uI/2pi(d) im confused about what d is and how the mass relates

70. ## math

When a soccer ball is kicked with a vertical speed of 25 m/s its height, h metres, after t seconds is given by the equation h=-5t^2+25t a) how long after it is kicked is the soccer ball at a height of 30 m ? b) How long is the soccer ball in the air?

71. ## Economics

The “medical arms race” literature suggests that hospitals compete on the basis of: a. costs. b. costs and price. c. quality. d. (b) and (c) are correct. Is (c) correct?

72. ## math 140

how do i determine if the amount of credit card debt of familiesin the US is left-skewed, right-skewed, or symmetric? I have read and re-read my book and still can not figure it out. thanks

73. ## college

What is the concentration of a solution of HCL in which a 10.0 mL sample of acid required 50.0 mL of 0.150 M NaOH for neutralization?

74. ## math

what is the area of the largest circle that will fit in a square with area 64 cm squared please help me its confusing

75. ## Math

Eliminate the parameter and write the corresponding rectangular equation whose graph represents the curve. x = sqrt t y = 1 - t

76. ## Chemistry

Hi, I posted a question yesterday : A compound contains only carbon, hydrogen, nitrogen, and oxygen. Combustion of 0.157 of the compound produced 0.213g CO2 and 0.0310 g H20. In another experiment, it is found that 0.103g of the compound produces 0.0230 g

77. ## physics help

A car travels at 80 km/h on a level road in the positive direction of an x axis. Each tire has a diameter of 66 cm. Relative to a woman riding in the car and in unit-vector notation, what are the velocity at the (a) center, (b) top, and (c) bottom of the

78. ## riddle

How do you make a w made out of pens into a square by moving only 1 pen

79. ## Math

A die is rolled once. What is the probability of getting number 5?

80. ## Math

If x is an angle in the first quadrant and cscx = 3 find the exact value of cos 2x

In what three ways can machines make work easier?

82. ## Project Management

How does the project audit differ from the performance measurement control system?

83. ## Math

Triangle ABC has vertices A(0,4),B(1,2),and C(4,6). Determine whether triangle ABC is a right triangle.Explain. How do I do this?

84. ## Physics

a) What is the tangential acceleration of a bug on the rim of a 6in. diameter disk if the disk moves from rest to an angular speed of 79 rev/min in 5 seconds? b) One second after the bug starts from rest, what is its tangential acceleration? What is its

85. ## Math

I hate word problems! Can anyone just change this Following word prob to equations pls. I can do the rest! Sam invested $4500, part at 7%, the rest at 8 1/2%. After one year, the interest earned on 7% investment was$150 less than the interest earned on

86. ## Algebra

Diane has one stamp of each positive integer value 1 cent through 9 cents, inclusive. She wants to put 10 cents worth of postage in a row across the top of an envelope. If arrangements of the same stamps in different order are considered different, how

87. ## chemistry

How many milliliters of NH3 (at STP) are needed to react with 45.0 mL of NO2 (at STP) according to the equation. Can someone please... help me? 8NO2 (g) + 6NH3 (g) --> 7N2) (g) + 9H2O (g) IS this help? a) 45.0 mL b) 27.5 mL c) 33.8 mL d) 60.0 mL

88. ## Critical Thinking

Controlling Irrational Fears After 9/11* We present this selection as an example of a fairly well-reasoned argumentative essay. There is more here than arguments—there’s some window dressing and you’ll probably find some slanters here and there as

89. ## math

evaluate: cos (arc sin (4/5) - arc tan 2) with out using a calc.

90. ## Osciallations

A harmonic oscillator has mass 0.530km and an ideal spring with force constant 146N/m . Find the period, frequency, and angular frequency.

91. ## statistics

Information given:the distribution of male head circumference (HC) is normal with a mean of 56cm and a standard deviation of 1.8cm first question -the prob that HC of a random chosen man is larger than 57.8cm is? Work: pr(x)>57.8cm z=(57.8-56)=1.8--->.9641

92. ## chemistry

For the equilibrium system: H2 + F2 2HF Kc = 230 If 5.80 mol of hydrogen gas and 5.80 mole are added to a 1.00 L flask what will be the concentration of HF at equilibrium?

93. ## Economics

What is medical arms race (MAR)?

94. ## biology

The synthesis (S) phase is characterized by DNA replication. cell division. replication of mitochondria and other organelles. the division of cytoplasm.

95. ## Quantum Physics

An electron and a proton each have a thermal kinetic energy of 3kBT/2. Calculate the de Broglie wavelength of each particle at a temperature of 2170 K. (kB is Boltzmann's constant, 1.38×10-23 J/K. The mass of the electron is 9.11×10-31 kg and the mass of

96. ## ochem

What's an equation of the hydrolysis of one ester group in tannins by CaCO3?

97. ## statistics

An ecologist uses the line, based on 13 colonies, to predict how many birds will join another colony, to which 54% of the adults from the previous year return. What is the prediction? Give your answer to two decimal places, and use the regression line

98. ## health

Identify and describe three causes for the increasing costs of health care

99. ## geometry

5. The lengths of segments PQ and PR are 8 inches and 5 inches, respectively, and they make a 60-degree angle at P. (a) Find the area of triangle PQR. (b) Find the length of the projection of segment PQ onto segment PR. (c) Find the length of segment QR.

100. ## math

Solve 2cosx-sin^x +2 =0 for all real values of x

101. ## Math

Can you see if my answers are correct? Directions find the GCF: (I did the factor tree for each) 40; 2^3 times 5 128; 2^7 GCF: 2 90; 3^2 times 2 times 5 105; 5 times 3 times 7 180; 3^2 times 2^2 times 5 GCF: 5 3x^3; what is that suppose to be 6x; 2 times 3

102. ## Math

Solve this equation log8 (x2 - 7x) = 1

103. ## math

Suppose 100 dots are arranged in a square 10 × 10 array, and each dot is colored red or blue. (a) Prove that this array must contain a “monochromatic” rectangle. That is, no matter how the red and blue colors are assigned, there must be either a set

104. ## math

Which of the following conditions does not ensure that a quadrilateral is a parallelogram? Answer choice: a) the diagonals bisect each other b) both pair of opposite sides are parallel C)a pair of opposite angles are congruent d) all of the above

105. ## Social Studies/History

How did Southerners and Northerners differ in their understanding of "majority rule"? Thanks!

geometry in Triangle xyz, ab is a midsegment of xyz. ax is = 26, bz=36 ay is congruent to ax and bx is congruent ot bz. I get that side yx = 52 and side yz is equal to 72 how do you get the value of side yz? is it 72?

107. ## algebra

Tree diagrams/ counting principles/ scp question: Two cards are drawn in succesion and with out replacement from a deck of 52 cards. find the following a. the number of ways in which we can obtain the ace of spades and the king of hearts, in that order. b.

108. ## History

We're learning about Roman Supremacy. What was the function of art and architecture in the Roman Empire? Thanks!

109. ## physics problem that i neeeed help with!

A person lifts a 3.8 kg cement block a vertical distance 0.9 m and then carries the block horizontally a distance 7.3 m. Determine the work done by the person and by the force of gravity in this process. ? J (by person) ? J (by force of gravity)

Describe three potential barriers to entry in the pharmaceutical industry.

111. ## chemistry

For the following reaction: 2NH3 ----> N2 + 3H3 6.42 moles of NH3 were placed in a 7.4 L flask and allowed to come to equilibrium. 3.60 moles of NH3 remain at equilibrium. Calculate Kc for the reaction.

112. ## statystics

A company manufactures wind turbines. A random sample of 25 turbines is taken and the sample mean life is 20.00 years with a standard deviation of 2.50 years. If you were constructing a 90% two-sided confidence interval estimate, the upper limit would be

113. ## chem lab (webwork)

What is the pH of the solution created by combining 1.80 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)? mL NaOH pH wHCl pH wHC2H3O2 1.80 Complete the table below: What are the pH values if you take

114. ## Stats

nformation given:the distribution of male head circumference (HC) is normal with a mean of 56cm and a standard deviation of 1.8cm first question -the prob that HC of a random chosen man is larger than 57.8cm is? Work: pr(x)>57.8cm z=(57.8-56)=1.8--->.9641

115. ## chemistry

what is the boiling point that contains 3.15 moles of ethylene C2H6O2 and 250.0g of H2O? answer should end in degree's celcius a) 1.03 C b) 93.55 C c) 106.45 C d) 6.45 C e) 103.44 C

116. ## statistics

Info given:With a random sample of 9 men. let X denote the number of men with head circumference larger than 57.8cm. the normal mean=56cm and standard dev=1.8cm. So this is a binomal dis- they ask; For X, calculate pr(X=2)? second part, Let X denote the

117. ## math

If Cosinex = 4/5 and x has its terminal side in quadrant lV, find the exact value of tangent 2x

118. ## math

Two chips are selected from a box containing 6 blue chips, 4 red chips, and 3 green chips. The first chip selected is not replaced before the second is drawn. Find P(red, then green).

119. ## ,math

Find the number of subsets of the given set. {math, English, history, science, art} Is this correct: 1. {} 2. {math} 3. {English} 4. {history} 5. {science} 6. {art} 7. {m, E} 8. {m,h} 9. {m, s} 10. {m, a} 11. {e, h} 12. {e, s} 13. {e, a} 14. {h, s) 15. {h,

120. ## chemistry

What would be the result if 5.0 L of hydrogen were burned with 2.0 L of oxygen in a closed containner?

121. ## math

List all the subsets of S. You may use "C" for chocolate, "V" for vanilla, and "M" for mint. 1. {} 2. C 3. V 4. M 5. CV 6. CM 7. VC 8. VM 9. MC 10.MV 11. CVM Is this correct.

122. ## stats

Info given:With a random sample of 9 men. let X denote the number of men with head circumference larger than 57.8cm. the normal mean=56cm and standard dev=1.8cm. So this is a binomal dis- they ask; For X, calculate pr(X=2)? second part, Let X denote the

123. ## language arts

words that ryme with kite

124. ## Algebra

How do you solve this system to find x and y? what is x and y? 3x + 4y = 8 y = 3x + 17

How is dividing a polynomial by a binomial similar to or different from the long division you learned in elementary school? Can understanding how to do one kind of division help you with understanding the other kind? What are some examples from real life

126. ## teenage society today

Hello everyone, I am an adult going back to school. I have to write a report about the changes in society today, especially in teenagers. So teenagers, my question for you is what is the type of "text messaging language" you are using? What do some of the

153. ## Math

A vase had 4 yellow flowers, 4 red flowers and 8 blue flowers. Donna takes one out, smells it and returns it to the vase. What is the probabilty she picked a red flower? What is the probabilty she picked a blue flower? Is it red 4:16 and blue 8:16?

154. ## Chemistry

Using ƒ´Hfo and So values, calculate the standard molar free energy of formation for each of the following: a. CuSO4(s) b. ZnSO4(s

i don't understant what sexual reproduction is and what asexual reproduction is could please help me understand

156. ## Math

You are playing a card game with a full deck of 52 cards. You win if you draw a red card that is a multiple of 5. What are your chances of winning on the first draw?

157. ## math

Two matrices can be multiplied only if their sizes are compatible. Suppose that U is an m × n matrix, and that V is a p × q matrix. In order for U•V to make sense, what must be true of the dimensions of these matrices? Although matrix multiplication

158. ## writing

i need help finding a title for my paper. im writing it about my relationship to a place and i wrote it about my relationship to this small town in new york. i talked about a creek and horse races and how its my second home, but i cant think of a creative

159. ## Research Writing

I have to pick a topic and list argument and counter-argument for a research paper (com 220 class). I would like to write about the death penalty, I just need help chosing a pro and con to write about. I believe I need more detail than just saying my topic

160. ## biology

Internal membranes play important roles in protein production and processing except they do NOT anchor ribosomes in place. transport substances to different areas. contain the hereditary information for the protein. modify proteins to go into vesicles.

161. ## chemistry

You need to find the number of moles in 5mL of a substance given the density and the molecular weight. How do you do this?

163. ## math

the product of 27% in algebraic expression.sorry the ? says to type the % as a decimal and use q to represent some number. would i write that like q=0.27

164. ## math

what is the area of the largest circle that will fit in a square with area 64 cm squared

165. ## math

Can you help me solve this solving quadratic equation.x^2-x-1=0

166. ## MATH

A set of numbers has “the triple-sum property” (or TSP) if there exist three numbers in the set whose sum is also in the set. [Repetitions are allowed.] For example, the set U = {2, 3, 7} has TSP since 2 + 2 + 3 = 7, while V = {2, 3, 10} fails to have

167. ## Math

Suppose p and q are odd integers. (a) Show that the quadratic equation x2 + px + q = 0 has no rational roots. (A number á is a “root” of that equation if: á2 + pá + q = 0. A number is rational if it is expressible as m/n for some integers m and n. )

168. ## Math

Eliminate the parameter and write the corresponding rectangular equation whose graph represents the curve. x = sqrt t y = 1 - t

169. ## Pre Calculus

Establish the following identity sin 2x/sinx - cos2x/cosx = secx

171. ## geometry

building a ramp that will be in the shape of a perfect right angle triangle vertical height will be 10 feet and horizontal base will be 15 feet what is the lenght of downward sloping side or the ramp

172. ## science

suppose 35 grams of waterare cooled from 15 c to 10 c how much heat is given off?

173. ## math

How do you find the perimeter of a square with all sides equal 15 inches?

174. ## math

the graphs of the equations y = x to da 2nd and x = 2 intersect in A.1 point B. 2point C. 3point D. 0point?

175. ## Statistics

True or False and explain: If the slope of a regression line is large, the correlation between the variables will also be large. I was thinking false but am now second guesing myself. Thanks.

176. ## math

I am not totally understanding this process. Factor Completely: x^5y^2 - x^4y^2 - 2x^3y^2

177. ## engineering

a data with an availability of 93.4% is accessed via a network with an availability of 99.2%. on average for how much time in a week would a user be unable to retrive data from database.

178. ## Geometry

The measure of the shorter parallel side of B is 6 inches and that of the longer side is 8 inches. The height of that figure is 10 inches. What is the area?

179. ## algebra II

I have been working on this problem for a while and for some reason I don't come up with the answer. a^2+b^2=c^2 I came up with 2square root 5 please tell me if this is correct. In a right triangle, Find the length of the side not given b=1, c=square root

I am trying to find the standard form of this equation for an ellipse. 9x^2 + 4y^2 - 36x + 8y + 31 = 0 First I grouped the x and y's together. 9x^2 - 36x + ? + 4y^2 + 8y + ? = -31 + ? + ? Then I factored the 9 and 4. 9(x^2-4x+4) + 4(x^2+2x+1) = -31+36+4

181. ## English

1. What was your parents' dream? Mother wanted to be a nurse, and Father wanted to be an architect. 2. What were our parents' dreams? Mother wanted to be a nurse, and Father wanted to be an architect. (Which question is corect? Do we have to use the

182. ## Math

I am trying to find the standard form of this equation for an ellipse. 9x^2 + 4y^2 - 36x + 8y + 31 = 0 First I grouped the x and y's together. 9x^2 - 36x + ? + 4y^2 + 8y + ? = -31 + ? + ? Then I factored the 9 and 4. 9(x^2-4x+4) + 4(x^2+2x+1) = -31+36+4

183. ## practice book

grt rid of the double negatives you sure its too hard a life?

185. ## accounting

What is the impact on the financial statements of missing a step when completing the accounting cycle?

186. ## Maths

the histories and development of Hindu-Arabic number system and the egyptain number system? plez.. i'm so confuse with these i need good explanation about this two system

187. ## Calculus - urgent

Find the dimensions of the largest cylinder that can be inscribed in a cone of fixed height H and fixed radius R

188. ## Pre Calculus

Establish the identity (cosx/2-sinx/2)^2=1-sin x

189. ## Cultural diversity

What are some of the changes the united States has made to policies concerning the immigration and treatment of Muslim and Arabix members of society?

190. ## writing

what is the difference between arab and muslims

191. ## language

victory-victories multiply-multiplies tiny-don't know thirsty-thirstness? justify-justified pray-prays or prayed dry-dryness anniversary-anniversaries? body-bodies rainy-not really sure comedy-comedies crazy-crazyness industry-industries decay-decayed?

192. ## college philosophy

I'm utterly lost!! What are the phenomenal and noumenal realities according to Kant?

193. ## Chemistry

When a sample of NO2(g) (849.9 grams) is placed in 390.0 L reaction vessel at 961.0 K and allowed to come to equilibrium the mixture contains 248.2 grams of NO(g). What is the concentration (mol/L) of NO2(g)? 2NO2(g) = 2NO(g)+O2(g) I keep getting .0212 or

194. ## math

solve 2cos^2x = square root of three cosx (couldnt find the sign on keyboard sorry) for principal values of x. express the solutions in degrees

195. ## algebra

dan has 6 worms on each pole and gary has 11 worms on each pole there are total of 13 poles and 103 how many poles does each guy have

196. ## Contest-Help-more thoughts

Hey, I need help coming up with a few lines. Lines you never wantto hear during summer vacaation. ex. that piece of newspaper is the toilet paper I don't know if these are good: -That was our plane money -I thought you were in charge of the kids -These are

197. ## algebra

How do you do it?:( im stuck! y=-x+4 y=-1/5x

198. ## world history

what single factor-geography, culture or economics- best explains why japan and china were not colonized by europeans in the same way as was africa?

199. ## Trig

Sin theta = 4/5 i got 53.1 as an answer but on my answer sheet is also has 126.9 How do i get that 126.9?

200. ## Chemistry

How do I decide whether something is polar or not?

201. ## Calculus - urgent

An isosceles triangle is inscribed in a circle of fixed radius R and centre O. What is the minimum area of the region outside the triangle and inside the circle?

202. ## math

25% of what number is 20 i got 1/4 can you tell me if i am right

203. ## COMMON PPL MATH MIDTERM

how do u draw an asymtote ? diff btwn set and interval notation? and example plz

SUFFIXES: -dairy=dairies -ability=abilities -cry=cries -journey=journies -liberty=liberties -dictionary=dictionaries -worry=worries -cherry=cherries -lady=ladies -supply=supplies -lazy=lazyness -penney=pennies

Which word would fit best for the word endangered, suffering, disappearing,or menacing in the sentence "With fewer than 100 Vancouver Island marmots living in the wild, it is one of the world's most endangered animals." ?

206. ## Organic chemistry

I know that sulfuric acid acts as a catalyst and removes water to help shift the equilibrium to form more productin an esterification. Can someone tell me if it is consumed? My thought is no. If I am right, can someone tell me why it is not consumed. If

207. ## Algebra

Without writing them all out, what is the number of subsets of set A = {tongue, ear, mouth, eye, nose, cheek, forehead, neck, shoulder}?

208. ## MATH

WHAT IS A COORDINATE PLANE?

209. ## biology

why is the fovea important?

210. ## EGYPT

I NEED TO KNOW ABOUT EGYPT THESE ARE THE QUESTIONS THAT I HAVE TO ANSWER: -IS THERE RURAL AREAS -IS THERE ANY CONFLICT(RELIGIOUS,SLAVERY ETC.) -IS THERE ANY POLUTION THAT'S ALL THANK U

211. ## Math

Hi! Can someone solve these for me pls? Y=10/x y=1/2x+4 solve for x and y thanks

212. ## ETH125 cultural diversity

With gaming such a fresh, and practically always fresh, issue between the Native Americans and the federal government, does the federal government ( or have they in the past) taxed the Native American casinos that are not on reservations?

213. ## Social Studies

Prince Henry had a school for sailors and for the advancement of navigation. Where did he send ships?

214. ## Brain Teaser

When Professor Sum was asked by Mr. Little how many students were in his classes, he answered, “All of them study either languages, physics, or not at all. One-half of them study languages only, one-fourth of them study French, one-seventh of them study

215. ## math Did I do it right?

Calculate using expanded notation, showing steps. 72 + 806 Did I do it right? 72 + 806 (7*10) + (2*1) + (8*100) + (6*1) =(8 * 100) + (7*10) + (6*1)

216. ## Geology

If a rock contains an isotope with a half live of 600 million years, and 0.5 half lives have elapsed since the rock formed, how old is the rock in millions of years?

-18

218. ## algebra

in graphing quadratic functions what are the ordered pairs for y=x*x+2

219. ## english

using these words : animate, dogged, gravity,indomitable,retaliate 1.This is what people do by dettling a score, getting even, and given other people a dose of their own medicine. which word describes this

220. ## practice book

get rid of the double negatives you never wanted to be no miner your sure its too hard a life?

221. ## Math

How do you find the axis of symmetry for this problem: -2(x+2)^2-1

222. ## nutrition

What are some of the health problems associated with undernutrition? Explain the cycle of malnutrition. Who does it impact?

223. ## it/205

o What is the difference between IT and information systems? Describe some functions of information systems.

224. ## Pre Calculus

Establish the following identity Sin2x/1+cos2x=tanx

225. ## language please check these

ARE THESE CORRECT(do they make sense to u): -he is a columnist -the remedy is working -you will receive a bonous -i don't know a reason -i bought an anniversary gift -the jewel is expensive -may i borrow an almanac -kate wants the checkersthe signature was

226. ## Pre-calc-urgent

How do you find a formula for f(x) and g(x) if h(x)=f[g(x)] h(x)=(2x^3-5)^4

227. ## Health Care

What are three issues faced by the aging population that you believe to be a problem? Why do you see these as problems? Are there any agencies in your community that address these problems? If so, what are they? If not, why do you think they are not being

228. ## biology

The structure of chromosomes is best explained as DNA broken apart into separate genes. extended to form very long, thin molecules. wrapped tightly around associated proteins. coiled up into a ball.

229. ## Health Care

I posted my question 40 minuts ago, how do I find out my answer? where would I will go to look for it?

230. ## Math

120 Are the last two digits divisible by 4 Are the last three digits divisble by 8 Are the sum of the digits divisible by 9 1048 Are the last three digits divisible by 8

231. ## math help

Let u = [2,−3, 1] and v = [0, 1, 4]. Calculate the vector u − v. Place u and v tail-totail to form two sides of a triangle. With regard to this triangle, what does u−v represent? Calculate the number u•u and discuss its relevance to the diagram you

232. ## Economics - stock purchase

Can someone please help me? I am so confused! My homework is called stock purchase and I need to find some information abut three stocks. I'm starting with microsoft. The first three questions are the stock name, symbol, and address of the headquarters.

233. ## nutrient

you determine that 1 ounce of the peanut butter container contains 115 calories and 9 grams of fat. What percent of the calories come from fat?

micromanagement of party goals a possible weakness of political parties?

235. ## engineering

in a proposed telesurgery application the image will be transmitted at 2*10^8m/s ovwe a roundtrip distance of 740km, the compression and decompression process for the images will take a total of 60m/s. what is the largest permissible value for the sources

236. ## Physics

How do you find the phase constant of the oscillation on a graph.

237. ## Social Studies cont.

Explain a very negative outcome of these explorations.

238. ## Math

120 Are the last two digits divisible by 4 Are the last three digits divisble by 8 Are the sum of the digits divisible by 9 1048 Are the last three digits divisible by 8

239. ## Algebra2

I can't get the right answer to this problem...what am I doing wrong? (2x-4)(x+1)^2 (2x-4)(x^2+2x+2) 2x^3+4x^2+4x-4x^2-8x-8 2x^3-4x-8 but the answer I'm supposed to get is 2x^3-6x-4 what am I doing wrong? Please help! thanks

240. ## Discrete Math

True or False ∅ ⊆ {∅}.

278. ## college math

canyou help me factor x^3-x=

279. ## English

I'm doing a persuasive speech on why people should donate blood. What would a good title be?

280. ## social studies

in what ways does religon affect american society?

what is a word for what happens when you are confused?

282. ## university of phoenix

i was trying to find information about finding out if a graph if a function

283. ## biology

where is sound perceived?

284. ## dps

how to find a (x1^3n+x2^3n) if x1 and x2 are the root of quadratic equation x^2+x+1

285. ## math

how do i collect the like terms 10p+5q-7p-7q would the answer be 3p,2q

286. ## MATH MID TERM TOMM PPL PLZ HELP

how do u draw an asymtote ? diff btwn set and interval notation? and example plz

287. ## hairdressing

descibe curved asin hairdressing

288. ## hairdressing

descibe curved lines

289. ## language

victory-victories baby-babies country-countries multiply-don't understant enemy-enemies marry-married highway-highways tiny-don't understant thirsty-thirstiness? carry-carries family-familys justify-justifies pray-prayed vary-varies dry-dryness

290. ## math

how do you solve (and show your work for): 5-2x=7