# Questions Asked onOctober 16, 2011

1. ## Physics w/ Calc

A baseball approaches home plate at a speed of 43.0 m/s, moving horizontally just before being hit by a bat. The batter hits a pop-up such that after hitting the bat, the baseball is moving at 54.0 m/s straight up. The ball has a mass of 145 g and is in

2. ## statistics

{Exercise 3.55} Morningstar tracks the total return for a large number of mutual funds. The following table shows the total return and the number of funds for four categories of mutual funds (Morningstar Funds500, 2008). a. Using the number of funds as

3. ## calculus

the cross section of a 5-ft long trough is an isosceles trapezoid with a 2 foot lower base, a 3-foot upper base, and an altitude of 2 feet. water is running into the trough at a rate of 1 cubic foot per minute. how fast is the water level rising when the

4. ## mastering physics

A lunar lander is descending toward the moon's surface. Until the lander reaches the surface, its height above the surface of the moon is given by y\left( t \right) = b - ct + dt^2, where b = 740 m is the initial height of the lander above the surface, c =

5. ## Chem-organic, bio, intro

A gas mixture contains oxygen and argon at partial pressures of 0.60 atm and 425 mmhg. If nitrogen gas added to the sample increases the total pressure to 1250 torr, what is the partial pressure in Torr of the Nitrogen added? Steps for solving this problem

6. ## arithmetic progression

given that the first term of an Ap is 7 and its 10th term is twice the second term calculate the 19th term.

7. ## calculus

water is poured into a conical paper cup so that the height increases at the constant rate of 1 inch per second. if the cup is 6 inches tall and its top has a radius of 2 inches, how fast is the volume of water in the cup increasing when the height is 3

8. ## Chemistry

Hg2+ + 2Cl- → HgCl Mercuric nitrate was standardized by titrating a solution containing 147.6 mg of NaCl(FM 58.44), which required 28.06 ml of Hg(No3)2 solution. Part a: Find the molarity of Hg(No3)2. I already calculated the molarity to be 0.04500 M

9. ## Physics

An airplane flying horizontally at a constant speed of 350 km/h over level ground releases a bundle of food supplies. Ignore the effect of the air on the bundle. a)What is the bundle’s initial vertical component of velocity? =0 b)What is the bundle’s

10. ## physics

A rubber ball of mass 18.0 g is dropped from a height of 1.75 m onto a floor. The velocity of the ball is reversed by the collision with the floor, and the ball rebounds to a height of 1.55 m. What impulse was applied to the ball during the collision?

11. ## CHEMISTRY

WHAT TYPE OF REACTION CAUSES THE FORMATION OF METALLIC MERCURY AND NAME THE REAGENT RESPONSIBLE? WHAT CAUSES THE SILVER CHLORIDE TO DISSOLVE AND NAME THE REAGENT? WHAT EVENTUALLY CAUSES THE SILVER CHLORIDE TO REPRECIPITATE, WHAT IS THE NAME OF THIS

12. ## physics

A particle starts from the origin at t = 0 with an initial velocity of 5.5 m/s along the positive x axis.If the acceleration is (-2.8i + 4.1jm/s^2, determine (a)the velocity and (b)position of the particle at the moment it reaches its maximum x coordinate.

13. ## Math

Help me!;/ 1) my numerator is 6 less than my denominator. I am equivalent to 3/4. 2)my denominator is 5 more than twice my numerator. I am equivalent to 1/3. 3)the gcf of my numerator and denominator is 3. I am equivalent to 2/5. 4)the gcf of my numerator

14. ## astronomy

6. Suppose that you travel to a planet that has 4 times the Earth’s mass and 4 times the Earth’s radius. Calculate how much more or less you would weigh on this planet compared to your weight on Earth. Express your answer as a factor or fraction of

15. ## physics

Suppose a stone is thrown at an angle of 30 degrees below the horizontal, if it strikes the ground 57m away, find (a)the time of flight, (b)the initial speed, and (c) the speed and the angle of the velocity vector with respect to the horizontal impact.

16. ## chemistry

Calculate the concentrations of all species present in a 0.32 M solution of ethylammonium chloride (C2H5NH3Cl).

17. ## Trig

Factor and simplify the expression. 1-sin^3 x

18. ## Chemistry

Explain the function of the aluminum wire and the mercury II chloride when testing for tin? when testing for antimony, what reagent prevents tin from reacting with the H2S to form SnS2? What reagent is used to identify copper and explain its function.

19. ## Physics

A motorist traveling at 15m/s encounters a deer in the road 38m ahead. If the maximum acceleration the vehicle's brakes are capable of is -7m/s/s, what is the maximum reaction time of the motorist that will allow him or her to avoid hitting the deer?

20. ## Chemistry

For ethanol, C2H5OH, which is mixed with gasoline to make the fuel gasohol, H°f = -277.63 kJ/mol. Based upon data in Table 6.2, and that the density of ethanol is 0.787 g•cm-3, the number of kilojoules released by burning completely 2.40 gallons of

21. ## English- The scarlet Letter

what rhetorical device does hawthrone use to reveal hester prynne's past? What do we learn about her?

22. ## Accounting

Prepare a schedule that lists the components of and calculates the personal and dependent exemption amount (based on current year exemption and dependency amount) that would be included on the Brock's individual tax return based on the following

23. ## chemistry

How many grams of carbon disulfide,CS2 will form if 0.450 mol of carbon is consumed in a 3C+2SO2=CS2 +2CO2 reaction

24. ## Calculus

A right circular cone is inscribed in a sphere of radius r. Find the dimensions of the cone that maximize the volume of the cone.

25. ## physical

. On Earth the Mars rover had a weight of 9800 N. What will be its weight on mars where the acceleration due to gravity is 4 m/s

26. ## Chemistry

Determine the pH of a 0.10 M MgCl2 solution.

27. ## chemistry

Find the volume of 0.120 M hydrochloric acid necessary to react completely with 1.51 g Al(OH)^3

28. ## Chemistry

the specific heat of aluminum is 0.900 J/g degrees celsius. how much energy is required to heat 45.0g of aluminum from 20.0 degrees celsius to 50.0 degrees celsius. a. 2840 J b. 810 J c. 1220 J d. 2030 J

29. ## Pure Maths

Two cones are similar in shape and the ratio of corresponding lengths is 3:5. (a) if the radius of the smaller cone is 12cm, find the radius of the larger cone. (b) if there is sufficient paint to paint 216 large cones, how many smaller cones can be

30. ## Physics

In order to open the clam it catches, a seagull will drop the clam repeatedly onto a hard surface from high in the air until the shell cracks. If a seagull flies to a height of 28.7 m, how long will the clam take to fall? The accelera- tion of gravity is

31. ## chemistry

Refer to 3CuCl2 (aq)+2Na3PO4 (aq) = Cu3(PO4)2+6NaCl (aq) If a student started with 18 grams of CuCl2 and enough Na3PO4 to completely react, how many grams of Cu3(PO4)2 will (theoretically) be produced?

32. ## Science: Physics

A spherical metal dome of radius 15 cm is electrically charged. It has a positive charge of +2.5 μC distributed uniformly on its surface. a. Calculate the electric field strength on the surface of the dome. b. Explain how your answer to a would change at

33. ## chemistry

The synthesis of urea by Frederich Wöhler in 1825 began the decline of the idea that "organic" chemicals could only be made by living organisms as part of their biological processes. AgOCN(aq) + NH4Cl(aq) → AgCl(s) + NH2CONH2(aq) If you perform this

34. ## physics

A block of mass = 0.85 kg is connected to a spring of force constant = 775N/m on a smooth, horizontal surface. 1) Plot the potential energy of the spring from = -5.00 cm to = 5.00 cm. 2) Determine the turning points of the block if its speed at x = 0 is

35. ## College Chemistry

I have no idea how to do this problem, and I've been searching through my book for an hour. Help please? An energy of 2.0x10^2 kJ/mol is required to cause a cesium atom on a metal surface to lose an electron. Calculate the longest possible wavelength of

36. ## math

A ferry boat operator is required to drive directly to the opposite side of the river (starting at south side of river is A and the north side of river is B where boat will end up) but does not know where to point the nose of the boat. The river is flowing

37. ## physics

A boy standing in a ditch throws a baseball upward toward his father. The ball leaves his hand at ground level, with an initial speed of 15.0 m/s, at an angle of theta = 53.0 degrees from the horizontal. The boy's father reaches up and catches the ball

38. ## chem

Write a total ionic equation for the reaction (if any) of FeCl2 with Cu, and for the reaction (if any) of FeCl2 solution with Al

39. ## mastering physics

An airplane is dropping bales of hay to cattle stranded in a blizzard on the Great Plains. The pilot releases the bales at 140 {\rm m} above the level ground when the plane is flying at 65.0 {\rm m}/{\rm s} 60.0^\circ above the horizontal.How far in front

40. ## English

Please help me with this... I haven't got much time, so the sooner the better :) Could you tell me what the simple subjects & simple predicates are in the following sentences? 1) Williamsburg is a restored colonial town in Virginia. 2) At this tourist

41. ## math

ball is thrown up at 88 ft/s from a height of 25 feet. Path of ball is y = -16t^2 + 88t +25. y is the height of ball above the ground t seconds after being thrown. when does it reach maxiumum height? (I got that at 2.75 s) At what time does the ball hit

42. ## Chemistry

Calculate the mass of silver nitrate, AgNO3, FW = 169.9 g/mole, that must be used to prepare 500.0 mL of 0.250 M silver nitrate solution.

43. ## physics

3. A car speeds up from 10.0 m/s to 30.0 m/s in 3.0 s. What is its acceleration? In your response, show your work, the given and unknown quantities, the equation and any necessary algebra. Express your answer with the correct number of significant digits.

44. ## chemistry

A student found that there are 115 drops of glacial acetic acid in 2.00 mL. Calculate the number of drops of glacial acetic acid, HC2H3O2 required to make 225 mL of 0.1 M acetic acid solution

45. ## English Literature

What special words does the author use to help you see hear, smell, and/or taste things in the story- The Tell- Tale Heart by Edgar Allan Poe?

46. ## Calculus

A right circular cone is inscribed in a sphere of radius r. Find the dimensions of the cone that maximize the volume of the cone.

Which of the followings is NOT characteristic of a good letter to the editor? a. Being rational b. being lenghty c. using good taste d. being fair Is B correct im not sure of this one any other opinions please

48. ## Analytical Chem

What are the molar concentrations of H3O+ and OH- in 0.200 M NaOCL

50. ## Calculus

Suppose f(x,y) = XY(1-10X-5Y). f(x,y) has 4 critical points. List them in increasing lexographic order. By that we mean that (x, y) comes before (z, w) if x

51. ## physics

what force is needed to accelerate at child on a sled at 1.4 meters per second square (total mass 55 kilo gram)

52. ## arithmetic

given that the first term of an Ap is 7 and its 10th term is twice the second term. calculate the sum of the 28 term.

53. ## Physics

A 5.00kg ornament is hanging by a 1.2m wire when it is suddenly hit by a 3.00kg missile traveling horizontally at 10.0 m/s. The missile embeds itself in the ornament during the collision. What is the tension in the wire immediately after the collision?

54. ## Physics

A 214 Kg boat is sinkin in the ocean. The boat has a weight of 2100 N. The boat's weight is partially offset by the 790 N buoyant force of the water acting upward. What is the net acceleration of the boat

55. ## physicss

A car traveling 84 km\h is 150 m behind a truck traveling 67km\h. How long will it take the car to reach the truck?(Second) I'll got the answer and it was 30 second But I really dono how It was solved I need the wayyy;((

56. ## geometry

if home plate is 60.5 feet from the pitcher's mound, find the distance from the pitcher's mound of a major league baseball field to the center of a circumscribed circle that touches home plate, 1st base and second base. Find the exact, simplified length of

57. ## physics

The drawing shows a human figure approximately in a sitting position. For the purposes of this problem, there are three parts to the figure, and the center of mass of each one is shown in the drawing. These parts are: (1) the torso, neck, and head (total

58. ## trig

A hill rises from the horizontal at 15º. The road leading straight up the hill is 800 meters long. How much higher is the top of the hill than the base of the hill? Round to the nearest meter. (Enter only the number.)

59. ## physics

As a sailboat sails 51.5 m due north, a breeze exerts a constant force 1 on the boat's sails. This force is directed at an angle west of due north. A force 2 of the same magnitude directed due north would do the same amount of work on the sailboat over a

60. ## Calculus

A rescue helicopter drops a crate of supplies from a height of 160 feet. After t seconds, the crate is 160 - 16t^2 feet above the ground. a) Find the velcocity of the crate at t=1 b) With what velocity does the crate strike the ground? for a do i just find

a ball is kicked in the air from the top of a cliff. the path the ball travels is given by the equation h(t)=-5t^2+17t+22 where h(t) is the height in metres and t is the time in seconds a) what is the maximum height that the ball reaches b)when will the

62. ## physics

A man tries to pull out a nail on the wall with a string attached to the head of the nail and pull at an angle of 30 degree to the wall if the tension in the string is 15N. Calculate the force effective pulling out the nail.

63. ## Chem

How do you convert? (a) 4.50 Cal to calories (b) 600.0 Cal to kilojoules (c) 1.000 J to calories (d) 50.0 Cal to joules

a ball is kicked in the air from the top of a cliff. the path the ball travels is given by the equation h(t)=-5t^2+17t+22 where h(t) is the height in metres and t is the time in seconds a) what is the maximum height that the ball reaches b)when will the

65. ## College Algebra

I need to find the domain of f, the excluded values of f, the domain of (fg)(x); find (f+g)(-5), (f-g)(x), and (fg)(x) to the problem of: Let f(x)=(7x+1)/(3x+2) and g(x)=6x+5.

66. ## chemistry

WHat is a precipitate?

67. ## CHEMISTRY

What is the reagent responsible for the formation of H2S in the qualitative analysis of group II? when the cations are separated into subgroups, what is the purpose of the potassium hydroxide,KOH?

68. ## Chemistry

Can you check if this is correct please? a) How many moles of sodium hydroxide are there in 19.00 cm3 of 0.100 mol dm3? My answer: 0.0019 mol b) How many moles of hydrochloric acid are, there in 25.00 cm3 of the acid solution? My answer: 0.0019 mol c) How

69. ## Analytical Chemistry

Calculate the number of grams needed to be dissolved and diluted to 100 ml to prepare 0.200M solution for the following substance BaCrO4. huh?

70. ## Chemistry

Hi Im reposting incase my original post doesn't get read. Please see bottom for additional info that I need help getting verified. Many thanks Hi Please help verify my answer to the following question: 0.500g of pure phosphorous was burned in excess pure

71. ## physics

calculate the shortest length of cable which can be used to support a load of 1000N if tension in the cable is not to exceed 710N? Take AC=BC

72. ## physics

A man tries to pull out a nail on the wall with a string attached to the head of the nail and pull at an angle of 30 degree to the wall if the tension in the string is 15N. Calculate the force effective pulling out the nail.

73. ## Xue Lin

What is the role of electron donor and electron acceptor in bioremediation?

74. ## Chemistry

A 0.4584 g sample of impure zinc chloride, ZnCl2, FW = 136.3 g/mole, was dissolved in water and excess silver nitrate was added to the solution. The mass of the dry silver chloride, AgCl, FW = 143.3 g/mole, produced was 0.8564 g. The balanced precipitation

75. ## college chemistry

How many kilocalories are released by freezing 4.6 moles of H20?

76. ## human resources

I wanted to know what is Walmart Internal Consistency ? Employee's goal that work in walmart Employer's goal ( walmart) Goverment's goal toward walmart? and Laws That Guide Discretionary Employee Benefits of Walmart.

77. ## art history

Discuss the ideological and visual differences between Renaissance Art and Baroque Art. (think in terms of, for example, religion, society, and scientific discoveries)

78. ## biology genetics

In Leghorn chickens, + stands for colored feathers and C represents white feathers. At an independently inherited gene, the allele + inhibits color expression, whereas I has no effect on color expression

79. ## physics

A ball is thrown upward.What is its maximum height? Its initial vertical speed is 11.5 m/s and the acceleration of gravity is 9.8 m/s2 . Neglect air resistance. Answer in units of m

80. ## physics

A skier starts from rest at the top of a hill that is inclined at 10.3° with the horizontal. The hillside is 210 m long, and the coefficient of friction between snow and skis is 0.0750. At the bottom of the hill, the snow is level and the coefficient of

81. ## physics

An object is released from rest on a planet that has no atmosphere. The object falls freely for 5.03 m in the first second. What is the magnitude of the acceleration due to gravity on the planet? Answer in units of m/s2

82. ## Chemistry

What is the frequency of light whose wavelength is 7.2x10^-6cm? And is the light visible? Explanation please.

83. ## geometry

angle d and e for linear pair and measure of angle e equal 3m angle d find the measure of each angle and the measure of the complement of angle d

84. ## Physics

light travels at a constant speed of 3x10*11 cm/sec. how long does it take light to reach the earth a distance of 1.5x10*8 km. give the answers in seconds and minutes.

85. ## physics

Consider a 20 cm long cylindrical glass of refractive index n=2.0. Left end of it is a concave spherical mirror with radius of curvature 12 cm for an object O inside the cylinder. The shape of the right end of the cylindrical glass is not known. If the

86. ## physics

For a fixed distance L between the object and the screen, there are two positions (1 and 2) of a converging lens which produce a reel image on the screen. These two positions are D apart. a) Derive the expression for the focal length f of the lens in terms

87. ## geometry

Prove that you have constructed point C on segment EF such that angle ACE is congruent to angle BCF. (Points A and B are on the same side of segment EF, but have different distances to the segment.) I am not sure if I am on the right track but this is how

88. ## science

how do cells use food using big idea of energy

89. ## marketing

To increase interest in rodeos, the local chapter of the National Rodeo Cowboys Association (NRCA) is offering free roping lessons to students in the sixth and seventh grades. An exchange will take place because:

90. ## PHYSICS

A Projectile IS FIRED FROM THE TOP OF A BUILDING WITH AN INITIAL VELOCITY STRAIGH UPWARD AT 40.0 M/SEC . THE TOP OF THE BUILDING IS 50.0 METERS ABOVE THE GROUND. A) THE MAXIMUN HEIGHT OF THE PROJECTILE ABOVE THE BUILDING. B) THE TIME FOR THE PROJECTILE TO

91. ## Physics

A ladder, mass 40 kg, 5 m long, is leaning against a vertical frictionless wall at an angle of 50egrees to the vertical. It is about to slip. What is the coefficient of friction on the floor? A man mass,80 kg,starts to climb up the ladder at 500. Measuring

92. ## PHYSICS

A car traveling at a constant velocity of 30.0 m/sec passes an intersection at time t=0. 45 seconds later a second car passes the same intersection and its traveling in the same direction at a constant velocity of 55 m/sec. when does the second car

93. ## Pre-Calc

A large painting in the style of Rubens is 3 feet longer than it is wide. If the wooden frame is 18 in wide and the area of the picture frame is 286 ft^2, find the dimensions of the painting. I have the basic idea down of what I'm supposed to do to solve

94. ## math

A 1200·kg elevator is attached to a cable whose tension is 11900·N. What is the magnitude of the elevator's acceleration? ____ m/s

95. ## Physics

A boy of mass 49.4 kg is initially on a skateboard of mass 2.00 kg, moving at a speed of 10.3 m/s. The boy falls off the skateboard, and his center of mass moves forward at a speed of 10.9 m/s. Find the final velocity of the skateboard.

96. ## CHEMISTRY

IF AFTER PRECIPITATION OF THE GROUP I CATIONS AS CHLORIDES BY THE REACTION WITH HCL NEARLY ALL OF THE PRECIPITATE DISSOLVES IN THE HOT WATER. WHAT ION IS MOST PROBABLY PRESENT AND WHICH IONS ARE MOST PROBABLY ABSENT?

97. ## Biology

In goats, the allele for black hair is dominant to that for red. Two black haired goats mated, producing twelve offspring. Of the first eleven, 8 had black hair and 3 had red hair. What is the probability of the twelfth offspring having red hair?

98. ## physics

The force required to flex a nasal strip and apply it to the nose is 0.25 ; the energy stored in the strip when flexed is 0.0025 . Assume the strip to be an ideal spring for the following questions.

99. ## Physics

At what projection angle will the range of a projectile equal to 5 times its maximum height?

100. ## physical science

how do i find how long the steel is in a 156 kg coil of sheet steel that is .80 mm thick and 50 cm wide.

101. ## CHEMISTRY

ANTACID TABLET OF WEIGHT 1.3183G WAS DISSOLVED IN 75 MLOF CONC. HCl OF 0.1807M IS TITRATED WITH 20.36ML OF CONC. NaOH OF 0.1481M . FIND MILIMOLES OF HCl ADDED, FIND MILIMOLES OF NaOH USED IN TITRATION, FIND MILIMOLES OF HCl THAT DID NOT REACT WITH ANTACID,

102. ## Art Appreciation

Visit the following Web sites and explore the collections of Ancient Art there: The Metropolitan Museum of Art The Louvre Museum The Smithsonian Institution Freer Gallery and Sackler Gallery See the Course Materials List for access to these sites. From the

103. ## Chem (last question, I promise)

You measure one edge of a cube using a meter stick marked in centimeters. Unfortunately, the edge is longer than 1 m. You mark the 1-m point on the cube edge with a pen and then, using a 15-cm ruler marked in millimeters, measure the remaining distance to

Create a rational function such that the graph of has vertical asymptotes at x=5 and x= -7, a hole at x=2 , and a horizontal asymptote at y = 14. By creating a rational function, you are to write rule for this function. There are many correct solutions

105. ## AP Calc

Simplify the fraction: (x^3-7x^2+17x-15)/(x-3) and solve numerically to find the two numbers close to 3 between which x must be kept if f(x) is to stay between 1.99 and 2.01.

106. ## Physics

A jet plane lands with a speed of 110 m/s and can decelerate uniformly at a maximum rate of 4.4 m/s^2 as it comes to rest. Can this plane land at an airport where the runway is 0.84 km long? Answer this by calculating. Answer in units of k

107. ## Physics

A 45 kg boy running at 3 meters per second jumps on to a 97 kg sled that is initially at rest. Find the resulting speed of the sled with the boy aboard.

108. ## geography

The question is - Into how many time zones is the Earth divided? My Answer is Twenty-Four time zones. Right? What is the approximate degrees of longitude for the International Date Line? My answer is 180 degrees longitude. Is this right? Thanks for all the

109. ## Accounting

Prepare the entry to record the accrued interest and the amortization of premium on December 31, 2010 using the straight-line method. INFO: Sharapove Co common stock, $100 par 200 shares$37,400 U.S. government bonds, 11%, due 4/1/2020, interest payable

110. ## statistics

the coach wants to introduce each of the starting players at tuesday's game. in how many different orders can each of the 5 starting players be introduced?

111. ## programming

develop a program that converts inches to centimeters(1 inch=2.54 cm). The program when runs should prompt the user to enter an inch value

112. ## organic chem

Calculate Percent Composition of the Unknown Mixture : Methanol BP 64.7 Toluene Bp 110.6

113. ## Chemistry

How many kilocalories are released by freezing 4.6 moles of H20?

114. ## Chemistry

You measure one edge of a cube using a meter stick marked in centimeters. Unfortunately, the edge is longer than 1 m. You mark the 1-m point on the cube edge with a pen and then, using a 15-cm ruler marked in millimeters, measure the remaining distance to

115. ## Chemistry

How do you do this? A block of metal measuring 3.0 cm X 4.0 cm X 5.0 cm has a mass of 470.0g. What is the density of the metal in grams per cubic centimeter?

116. ## physics

A 66.0-kg person throws a 0.0450-kg snowball forward with a ground speed of 35.0 m/s. A second person, with a mass of 57.0 kg, catches the snowball. Both people are on skates. The first person is initially moving forward with a speed of 2.40 m/s, and the

117. ## statistics

a.a statistics practitioner randomly sampled 100 observations from a population with a standard deviation of 5 and found that x is 10. Estimate the population mean with 90% confidence. Repeat (a) with a sample sixe of 25

118. ## accounting

My friend Robert Hughes runs hardware business in down town Dallas. Because of competition he relies on neighborhood customers for sales. From inception of operations to December 31, 2010, Robert Hughes Hardware Company provided for uncollectible accounts

119. ## Chemistry

what is the frequency of light if its wavelength is 5.4 x 10^-7meters? Explanation too, please.

120. ## fin 301

explain how risk is taken into account for a financial instrument.

121. ## chemistry

1. How many grams of P4 will react with 35.0 grams of H2O according to the balanced equation P4+5O2+6H2O=4H3PO4? 2. If you have 50 grams of P4, 40 grams of H2O, and an unlimited supply of O2, which reactant (according to the above balanced equation) is the

122. ## chemistry

Explain why atomic emmission spectra for different elements consist of different arrangements of discrete bright lines.

123. ## Geometry

Given b is the midpoint of AC. AB=6x+7 and BC is 18x-4 what is the length of AB BC AC

124. ## Awards

What kind of awards do they give out @ a 7th grade/8th award ceremony???

125. ## calculus

an airplane is flying at an altitude of 6.7 miles towards a point directly over an observer. if the speed of the plane is 499 miles per hour, find the rate at which the angle of observation, Ɵ, changing by at the moment when the angle is 21 degrees.

126. ## Physics

A block of mass m1 = 6.25 kg on a frictionless plane inclined at angle θ = 30.7° is connected by a cord over a massless, frictionless pulley to a second block of mass m2 = 2.36 kg hanging vertically (Fig. 5-52). (a) What is the acceleration of the

127. ## Chemistry

An experiment was done to determine the formula and formation constant of a metal ammine. The data were graphed giving a straight line plot with an equation of y = -5.9484x - 11.447. What is the correct forumla for this metal amine? M(NH3)6+ M(NH3)5+

128. ## College Chemistry

About half the world's production of pigments for paints involves the formation of white TiO2. It is made on a large scale by the chloride process , starting with ores containing only small amounts of rutile, TiO2. The ore is treated with chlorine and

129. ## science

how do cells use food using big idea of energy

130. ## English2000

1- Who Killed Lord Randall? a. His girlfriend b. A rival for his girlfriend's love c. His girl friend's Father d.the killer's identity is not known i chose d 2- The intruders into the couple's house are two a. kings b.members of the gentry, or landowning

131. ## Chemistry

calculate the mass percent of sand, sodium chloride and copper(ll) sulfate in a sample that yields: mass of sample= 14.088g, mass of sand=0.2255g, mass of copper(ll)oxide = 0.1994g (assume 100% yield for each of the copper(ll) reactions) CuSO4(aq) +

132. ## English Literature

How do these words set the mood for the story? (The Tell-Tale Heart)

133. ## film

can anyone explain Veronica Sawyer and JD in the movie Heathers

134. ## physics

a) A stepped optical fiber consists of a central cylindrical core of refractive index n1 and a cladding of refractive index n2. Show that the maximum acceptable angle at which light enters the plane end of the core of the fiber from air is èmax = (sin^-1)

135. ## Algebra

Translate to an equation: h $100 bills and t$20 bills total $400 Graph the equation and use the graph to determine three different combinations of$100 bills and $20 bills that total$400. Submit your graph through the dropbox.

136. ## physics

Water from a garden hose that is pointed 21° above the horizontal lands directly on a sunbather lying on the ground 4.3 m away in the horizontal direction. If the hose is held 1.4 m above the ground, at what speed does the water leave the nozzle?

137. ## chemistry

For a particle in the lowest energy level of a one dimensional box 1 Angstrons wide, calculate the probability of finding the particle between 0.40A and 0.60A

138. ## English Literature

What pictures did the author leave in your mind? (Tell-Tale Heart)

139. ## History

Why were there major health problems in the British Caribbean between 1838-1876?

140. ## geometry

Suppose the parallelogram shown has angles defined by the following expressions: angle A = 6x + 19; angle B = 3x - 21; angle C = 6x + 19; and angle D = 3x - 21? What is the measure of the largest angle?

141. ## Economics

This is about economic solution.There are 2 regions but they were given by different each other function of demand and supply.1.First question is we won't sell these products on both regions and you can't transport the product each other.So please find the

142. ## English

It is confusing me when it is at the end of the sentence... Amelia Earhart also flew nonstop across the Atlantic; the first woman to do so was (her, she). I am thinking try the sentence with one word at a time to see which makes sense.. so I am thinking

143. ## trig

Alan is using the equation mg sin A = umg cos A to determine the coefficient of friction, u, between a flat rock and a metal ramp. Find u to the nearest hundredth, if the rock begins to slide at 19º.

144. ## college algebra

The average rate of change of g(x) = x3 - 12x + 16 from x = -2 to x = 4 is 64 / 2 = 32. true or false

145. ## chemistry

Data: SO2(g) + ¨öO2(g) ¡æ SO3 (g) ¥ÄH = -99.1 kJ Given the above data, calculate the enthalpy change ¥ÄH when 89.6 g of SO2 is converted to SO3.

146. ## calculus

my circular swimming pool has a 29 foot diameter and is 8 feet tall. at the beginning of the summer i need to fill the pool with water. the flow rate from my spigot into the pool is about 0.75 cubic feet per minute. how fast is the water level, h, rising

147. ## physics

a runner run halfway around a circular track whose radius is 60 meters in 45 secs what is the average velocity? what is the average speed?

148. ## English

I forgot the following sentences. 1) They suspect of Duncan's sons. Lady Macbeth gets crazy and starts talking and walking in her sleep. 2) The King's Men was Macbeth's acting company. They (or it?) assumed this name when James I became king. 3) The

149. ## Management

Can anyone please help me with these questions for the final exam? 1) It is April, and you are the plant manager at a unionized parts warehouse. You have been asked by top management to inform the line workers that the plant will be shut down during

150. ## Geometry

Vw is bisected by xy and xz at x creating 3 angles if m< vxy= 6x-14 and m

151. ## Algebra

At a price of $10 the local pizza sells 800 pizzas. At a price of$8 the pizza place sells 1000 pizzas. When the quantity equals 100 pizzas, total costs equaled $1300. When quantity equaled 200 pizzas, total costs equaled$ 2200. When quantity equaled 300

152. ## calculus

Find the derivative of the function y(x)=c^x+x^c. Assume that c is a constant.

153. ## accounting

Bill has just started working for a major grocery store as a check-out clerk. Mason is training him in the duties of the new position. At the end of the first day, Bill and Mason are counting the cash in their drawer and reconciling cash receipts to the

154. ## Statistics

Starting with the data values 70 and 100, add three data values to the sample so that the mean is 81, the median is 91, and the mode is 91. How do i do this??

155. ## Maths trigonometry

using basic trigonometry derive the following equations, which are used to convert cartesian to polar coordinates and vice versa. why is the cos(phi)in the x term? x = R cos (phi) sin (lamda) y = R sin (phi) they are used in orthogonal projection of a

156. ## Chemistry

find the color of light that is known to have an energy of 4.59x10^-19joules Explanation too please.

157. ## algebra 1

suppose the absolute value of x is

158. ## Please tell me if i did this correct

Given the following frequency distribution, find the mean, variance, and standard deviation. Please show all of your work. Errors Frequency 51-53 9 54-56 19 57-59 16 60-62 24 63-65 25 This is what I got: Mean = 59.19 Variance = 1.43 Standard Deviation =

160. ## history 101

why did the development of civilization in the americas and sub saharan africa differ so dramatically from development in Eurasia? why did certain Eurasia civilizations thrive while others collapsed during the first millenium B.C.E.

161. ## Chem (conversions)

How do you convert? (a) 72 F to C and K (b) -12 C to F and K (c) 178 K to and C

162. ## Calculus

Show that of all rectangles with diagonal length c, the square has the largest area.

Na2CO3 NaCl

164. ## Chemistry

to heat 12.4g of water from 20.0 degrees celsius to 25.0 degrees celsius requires ? a. 259 J b. 1300 J c. 040 J d. 1050 J

can u help to have an idea to get the correct answer.for the question below. AUTOCRATIC,CUSTODIAL, SUPPORTIVE AND COLLEGIAL MODEL. What model of organizational behavior would be most appropriate in each of the following situations? (Assume that you must

166. ## Physics

Find the linear momentum and kinetic energy of a bullet of mass 4.80e-2 kg moving at a speed of 320 m/s. I found the linear momentum to be 15.36 by doing m*v but I can't figure out the kinetic energy.

167. ## physics

A small fish is dropped by a pelican that is rising steadily at 0.61 m/s.The acceleration of gravity is 9.81 m/s2. How far below the pelican is the fish after the 3.1 s?

168. ## Chemistry

At2 26.3C, F2 molecules have a certain value of rms speed. At what temperature would the rms speed of O2 molecules be the same?

169. ## physics

A bowling ball weighing 40.0 N initially moves at a speed of 4.90 m/s. How long must a force of 54.0 N be applied to the ball to stop it?

170. ## Plz help me Sue!!

Starting with the data values 70 and 100, add three data values to the sample so that the mean is 81, the median is 91, and the mode is 91. How do i do this??

171. ## Economics

(BLANK) is the method by which a corporation "writes down" the cost of an assent over a period of years as opposed to (BLANK)

can u help to have an idea to get the correct answer.for the question below. What model of organizational behavior would be most appropriate in each of the following situations? (Assume that you must use the kinds of employees and supervisors currently

173. ## physics

A biconcave lens made from glass with n=1.5. The radii of curvatures are 20cm and 10cm, and thickness is 5cm. An object of height 2cm is placed 8cm to the left of surface of the lens. a) Describe the final image; location, nature (real/virtual), size,

174. ## geometry

the measure of angle 1 is 15 less than twice the measure of angle 2. find the measure of angle 2

175. ## Math-confused...plz help

I. Use Chebyshev’s theorem to find what percent of the values will fall between 183 and 227 for a data set with a mean of 205 and standard deviation of 11. II. Use the Empirical Rule to find what two values 99.7% of the data will fall between for a data

176. ## Science

How would you obtain a sample of the salt potassium chloride?

177. ## algebra

For every point (x,y) on the graph y = 30 - 5x^2, consider a rectangle with corners (-x, 0), (-x,y), (x,0), and (x,y). For which value of x does the rectangle have a maximum area?

178. ## physics

A 4.63-g bullet is moving horizontally with a velocity of +349 m/s, where the sign + indicates that it is moving to the right (see part a of the drawing). The bullet is approaching two blocks resting on a horizontal frictionless surface. Air resistance is

179. ## home insurance

the type of life insurance often used as mortagage insurance is: A.decreasing term B.universal life C.whole life D.homeowners insurance i got B

a swimmer speeds up from 2 m/s to 6 m/s during the last 20 seconds of the race. what is the acceleration of the swimmer?

181. ## math

graph of a parabola has the following: y-intercept at 60 minimum at (4.25, -12.25) zero at 6 Find the other zero.

182. ## math

If h=6, the IVP becomes dP/dt=P(7-P)-6, P(0)=Po Solve the IVP in implicit form though you should apply initial conditions. How small does Po have to be for the population to become extinct in finite time? explain using phase portrait.

183. ## MATH

HOW CAN YOU SOLVE 5X + 3 = 23

184. ## Calculus

Given the following functions: F(u)= u^(5/2) and g(x)= x^6+1, find-f(g(x))=?, f'(u)=?, f'(g(x))=?, g'(x)=?,(f o g)'(x)=?

185. ## geometry

Suppose the parallelogram shown has angles defined by the following expressions: angle A = 6x + 19; angle B = 3x - 21; angle C = 6x + 19; and angle D = 3x - 21? What is the measure of the largest angle?

186. ## math

determine the maximum or the minimum value for each a)y=2x^2+12 b)y=-3x^2-12x+15 c)3x(x-2)+5

187. ## Math

Reasoning. If you live 71mi from a river, does it make sense to say you live about 80 mi from the river? Explain

188. ## Math

Order the following list of ‘numbers’ from smallest to largest. Describe any restrictions that apply. Respond to the general case, not a specific example. Then explain where ‘.cb’ would appear in the list. .ab .aca .a

189. ## PHYSICS

A ROCK IS THROWN OFF A CLIFF WITH AN HORIZONTAL VELOCITY OF 55.0 M/SEC. IT TAKES THE ROCK 7.0 SEC TO HIT THE GROUND A)WHAT IS THE HEIGHT OF THE CLIFF B) HOW FAR FROM THE FOOT OF THE CLIFF DOES THE ROCK HIT THE GROUND C)WHAT IS THE HORIZONTAL COMPONENT OF

190. ## Physics

You stick your arm over the edge of the Grand Canyon, and throw a ball vertically upwards with a velocity of 15 m/s. Compared to the heighht that you throw the ball, what height is the ball after 6 seconds?

191. ## chemistry

What is the origin of homochirality in amino acids and sugars?

Hi Teachers !!!!:) Ms. Sue remember I told you about my grades well I got some a few questions I would like to ask you. This you post: 98.33 + 93.0 + 96.66 = 287.99 287.99 / 3 = 95.9966667 Your average for these three classes is 96%, which is a GPA of

193. ## algebra

Find all solutions to x^4 + 3x^2 = 4x^3 + 1

194. ## Government

Define the terms liberal, conservative, libertarian, and populist. Use them to discuss several current political issues. Ok so I have defined the terms but not so sure what to write for the several current political issues. Please help or give me website

195. ## Chemistry

What is the purpose of adding a small volume, e.g 1ml of glacial acetic acid in the mobile phase during HPLC analysis? Thanks.

196. ## Calculus

6.] Replace the integral in exercise 5 (int. (1/ 1 – t) dt a = 0, b = 1/2with ?1/(1+t) dt with a = 0, b = 1, and repeat the four steps. a. integrate using a graphing utility b. integrate exactly c. integrate by replacing the integrand with a Taylor

197. ## chemistry

what volume would a gas occupy, if you had a 37.L cyliner that was 45 atm and temperature of 18C was released to the atmosphere (P=760.mm Hg) which had a temperature of 37C? Can you show me how to set this up?

198. ## math

I Wanted To Find The Square Root Of (1-2i) But I Didn't Know How To Solve It. My Solution : x+yi = sqr(1-2i) x2-y2+2xyi = 1- 2i x2-y2 = 1 2xy = -2 y = - 1/x x2 - (-1/x) = 1 ] * x2 x4-x2-1 = 0 How To Evaluated (x4-x2-1) ? I Tried To Sol

199. ## Ethnic

• Write a 700- to 1,050-word essay in which you answer the following questions: 1. What distinguishes African American Muslims from other practicing Muslims in the United States? 2. How has the immigration of Muslims and Arabs been influenced by the

200. ## math

A ladder is resting against a wall. the foot of the ladder is 8 feet from the wall, and the top of the ladder is 19 feet from the ground. FIND THE slope of the ladder

201. ## psychology

Over an extended period of time, the same reactions that fight stress will: A) make the body more vulnerable to other stressors. B)gradually discontinue. C)increase one's energy level. D)become forms of positive stress. I read something about choice D but

202. ## Probability

rent-4-wheels makes a profit of $12 per day for each car rented, and loses$4 per day for each car that is not rented. How many cars should the company have on hand to maximize profit, subject to the following probability distribution: anticipated number

203. ## Math

If two parallelograms are similar, what do you know about the ratios of the two side lengths within one parallelogram and the ratios of the corresponding side lengths in the other parallelogram?

204. ## physics

A bird is sitting on a wire 22m long. The wind makes it move, creating a standing wave with 8 loops. What is the wavelength?

205. ## algebra

3 - 6/7 x = 21

206. ## computer science

i have two numbers... 1564656 1981676 i want to check if the first and the last number from a string of these numbers are the same or not...how would i do that. how would i just compare the first and a last number and ignore the other numbers in this

207. ## poli sci ( still stuck)

What is the significance and symbolism of the words on the California state flag? I searched different websites none of them discuss the significance and symbolism of the words( California republic)?

208. ## physics

A block of mass = 0.85 kg is connected to a spring of force constant = 775N/m on a smooth, horizontal surface. 1) Plot the potential energy of the spring from = -5.00 cm to = 5.00 cm. 2) Determine the turning points of the block if its speed at x = 0 is

209. ## American History

Which country was part of the war but never signed the Treaty of Versailles? Germany, the US, France or Britian?

210. ## programming

I need to do this but I don't know how to start! I'm so bad a this class, and I'm just taking it because is a required! Please help! Write an algorithm that solves tax calculation problem.

211. ## English

Can anyone check this text and if there are any mistakes, fix it? I am writing to complain about the advertisement for your new game. I just played the game and then i realised that the advertisement is misleading. You say there are big cash prizes and

212. ## acc/422

Week Two Individual Assignment the Robert Hughes Hardware Company My friend Robert Hughes runs hardware business in down town Dallas. Because of competition he relies on neighborhood customers for sales. From inception of operations to December 31, 2010,

213. ## AP environmental Science

What formula would i use to solve: If the earth has an annual growth rate of 1.2% how many people are added to the earth each year? what will be the population of earth in 2050? thanks, any help is appreciated!! :D

272. ## informal Logic

Examining reasons and constructing arguments can help in (Points : 1) everyday life. science. ethics. All of the above.

273. ## informal Logic

A strongly supported claim in science should be regarded as (Points : 1) correct, but something that can always be revised. necessarily true. meaningless but fun. correct, and never needing re

The random variable x is normally distributed with mean =1,000 and standard deviation =100. Sketch and find each of the following probabilities: P(x

275. ## Algebra

whats the answer for 14(3-7x)=-(9+2x) with simple steps on how to do it

276. ## Macroeconomics

You want to start a company and are trying to decide between two different industries Industry A has 20 firms and a Concentration Ratio of 30% and indrustry B has a Concentration Ratio of 80%

277. ## English

Thank you. I forgot to add the following questions. 1) The devices used by Wordsworth are: Similes (lonely as a cloud ......), personification (crowd, host..), repetition. (what connector is most approprate to list the devices?) 2) The daffodils are

278. ## Chemistry

"Suppose some sort of clamp is applied to hold an electron fixed at the distance of 2.5 Angstroms from a lithium nucleus Li3+ which is also clamped into position. Calculate the magnitude of the force between the two fixed particles." The books says the

279. ## math

if(x+2),(x+50and(2x*3+1)are 3 consective term of an A.P.fine the posible value of x

280. ## poli scie

How many years has barbara Boxer and Dianne Feinstein been in office for?

281. ## Science

I just want to make sure this is correct. Ocean currents moving from low latitudes to high are GULFSTREAM, while those moving from high to low are CANARY.The all caps are my answers and I have searched the web and how found several things that might be it

282. ## poli sci

WHat does terms in office means? does it mean the number of years the person has hold that position? ex) barbara boxer had been senator for 4 terms(in progress)

283. ## english

What word is the correct one and why? When Samuel P. Langley built a steam-powered airplane, both the pilot and (he, him) were sure to fly.

determine the maximum or the minimum value for each a)y=2x^2+12 b)y=-3x^2-12x+15 c)3x(x-2)+5

285. ## math

in 5/90 there was draw like wining machine 69-29-62-72-32 = 60-17-35-16-48 the next draw was wining machine 11-25-38-89-57 = 39-5-37-34-27 the next draw was wining machine 7-41-5-37 83 = 69-25-54-53-31 now these draws was a three weeks continous draw, how

286. ## bio270

In an electrocardiograph a wave of sustained depolarization moving towards a negative electrode will produce:

287. ## math

if you have 150 boxes 48 are red 46 are orange and 50 of them green what is the grates commen fator

288. ## SCIENCE

WHAT IS THE AVERAGE SPEED [KM/H] FOR A CAR JOURNEY OF 120 KM THAT BEGAN AT 9:30 A.M. AND FINISHED AT 11:30 A.M.? HINT HOW MANY HOURS ARE BETWEEN 9:30A.M. AND 11:30A.M

290. ## english

okay one more to be sure I got it. May Beth and ____ help with the decorations? She can go here because it is the subject and I need a subject pronoun??

291. ## informal Logic

A strongly supported claim in science should be regard

292. ## Science

pHs 4,10,7,6,12. Can you please tell me which two of these could be mixed to make a neutral solution

293. ## geometry

the amount of metal in the nut?

294. ## SOC101

which group is mostly likely to donate to charity?