# Questions Asked onFebruary 3, 2013

1. ## algebra

Could someone check my work; 1. Generate the first five terms in the sequence using the explicit formula. yn = –5n – 5 –30, –25, –20, –15, –10 30, 25, 20, 15, 10 –10, –15, –20, –25, –30(my answer) 10, 15, 20, 25, 30 2. What is the

asked by lee
2. ## physics

The cheetah can reach a top speed of 114km/h (71mi/h). While chasing its prey in a short sprint, a cheetah starts from rest and runs 50m in a straight line reaching a final speed of 91 km/h. a.) Determine the cheetah's average acceleration during the short

asked by george
3. ## Physics

A wooden block of mass m = 9 kg starts from rest on an inclined plane sloped at an angle θ from the horizontal. The block is originally located 5m from the bottom of the plane. If the block, undergoing constant acceleration down the ramp, slides to the

asked by Mike
4. ## spanish 102

¿Se peinaron las chicas antes de dormir? Sí, las chicas se peinaron antes de dormir. ¿Te cepillaste los dientes después de comer? ¿Se maquilla Julia antes de salir a bailar? ¿Se duchan ustedes antes de nadar en la piscina?

asked by ashley
5. ## Physics

Two point charges attract each other with an electric force of magnitude F. If one charge is reduced to 1/3 its original value and the distance between the charges is doubled, what is the resulting magnitude of the electric force between them?

asked by P
6. ## Pre-Calculus

An Alfa Romeo going at 70 mph requires 169 feet to stop. Assuming that the stopping distance is proportional to the square of velocity, find the stopping distances required by an Alfa Romeo going at 35 mph and at 140 mph (its top speed).

asked by Becky
7. ## chemistry

1.00 g zinc and 0.80 g sulfur are allowed to react all the zinc is used up 1.50 g of zinc sulfide is formed and some unreacted sulfur remains what is the mass of unreacted sulfur

asked by tony
8. ## Physics

Current flow through a lamp is 1.3 A. How many Coulombs of charge are passed through the lamp in 2 minutes? Formula for coulombs and current? Not sure..

asked by Physics fail
9. ## CHEMISTRY URGENT!

assume that 13.5g of AL react with HCl according to the following equation, at STP: Al(s) + HCl(aq) ---> AlCl3 + H2(g) Remember to balance the equation first. a. how many moles of Al react? b. how mang moles of H2 are produced? c. how mang liters of H2 at

asked by kikie
10. ## chemistry

For the reaction below, Kp = 1.16 at 800.°C. CaCO3(s) CaO(s) + CO2(g) If a 21.7-g sample of CaCO3 is put into a 10.6 L container and heated to 800°C, what percentage by mass of the CaCO3 will react to reach equilibrium?

asked by gina
11. ## Calculus

A lighthouse is located on a small island 3 km away from the nearest point P on a straight shoreline and its light makes four revolutions per minute. How fast is the beam of light moving along the shoreline when it is 1 km from P?

asked by bryan
12. ## Physics -conceptual

A 1 mF, a 2 mF, and a 3 mF capacitor are connected in series, the combination being connected across a 9 volt battery. Which capacitor has the greatest voltage?

asked by Liz
13. ## Grade 10 Math

The Brooklyn Bridge in New York City is a suspension bridge that crosses the East River and connects Brooklyn to the island of Manhattan. If the origin is placed at the top of one of the cable suport towers, as shown, the shape of a cable that supports the

asked by Vanessa
14. ## Physics

A subway train starting from rest leaves a station with a constant acceleration. At the end of 5.59 s, it is moving at 11.5154 m/s. What is the train’s displacement in the first 4.15337 s of motion? Answer in units of m

asked by michael
15. ## Chemistry

What is a Balanced equation for sulfur (IV) oxide (g) and magnesium oxide (cr)?

asked by Ashton
16. ## physics - conceptual

Three identical capacitors are connected in series to a battery. If a total charge of Q flows from the battery, how much charge does each capacitor carry? A)9Q B)Q/3 C)Q D)3Q E)Q/9

asked by Liz
17. ## Chemistry

For the reaction of hydrazine (N2H4) in water, Kb is 3.0 10-6. H2NNH2(aq) + H2O(l)--> H2NNH3+(aq) + OH-(aq) Calculate the concentrations of all species and the pH of a 1.6 M solution of hydrazine in water. [OH-] = [H2NNH3+] = [H2NNH2] = [H+] = pH =

asked by Daniel
18. ## Physics

The drawings show three charges that have the same magnitude but different signs. In all cases the distance d between the charges is the same. The magnitude of the charges is |q|= 5.5 µC, and the distance between them is d = 4.3 mm. Determine the

asked by Don
19. ## CHEMISTRY URGENT!

a sample of oxygen that occupies 1.00 x 10^6mL at 575mmHg is subjected to a pressure of 1025atm. what will the final volume of the sample be if the temperature is held constant? how do uu set up the equation

asked by kacie
20. ## chem

How many pounds does 40.9 in3 of gold weigh? (The density of gold is 19.3 g/cm3, 2.54 cm = 1 in, and 454 g = 1 lb.) Note these are not large volumes--a cup of water is about 30 in3. So I tried this question and got 34.73, which isn't right. I used this: (1

asked by Anonymous
21. ## physics

What must her minimum speed be just as she leaves the top of the cliff so that she will miss the ledge at the bottom, which is L = 2.50{\rm m} wide and h = 9.50{\rm m} below the top of the cliff?

asked by Bovvy
22. ## calculus

Find the particular antiderivative that satisfies the following conditions: dy/dx=8x^-2+6x^-1-3 where y(1)=7

asked by Anonymous
23. ## Differential eqns

a) Sketch the phase line for the differential equation dy/dt=1/((y-2)(y+1)) and discuss the behavior of the solution with initial condition y(0)=1/2 b) Apply analytic techniques to the initial-value problem dy/dt=1/((y-2)(y+1))), y(0)=1/2 and compare your

asked by Erica
24. ## Physics

A bullet of mass 45 g is fired at a speed of 220 m/s into a 5.0-kg sandbag hanging from a string from the ceiling. The sandbag absorbs the bullet and begins to swing. To what maximum vertical height will it rise? Hint: Energy is not conserved as the bullet

asked by Khalifa
25. ## Physics

A proton experiences a force of 4 Newton when it enters perpendicular to the direction of the magnetic field with a speed 100 m/s. What is the force experienced by the proton if it enters parallel to the direction of the magnetic field with a speed of 200

asked by gaaaarh
26. ## Calculus

Two people start from rest at the same point. One walks east at 3 mi/h and the other walks northeast at 2 mi/h. How fast is the distance between the people changingg after 15 minutes?

asked by bryan
27. ## chem

Oxygen gas and water are produced by the decomposition of hydrogen peroxide. If 10.0 mol of H2O2 decomposes, what volume of oxygen will be produced? Assume the density of oxygen is 1.429g/L. 2H2O2= 2H2O+O2

asked by oscar
28. ## Alegebra I

I need help please!!! On January 1, 2010, Chessville has a population of 50,000 people. Chessville then enters a period of population growth. Its population increases 7% each year. On the same day, Checkersville had a population of 70,000 people.

asked by Amber
29. ## Maths

1..The first 2 terms of a geometric progression are the same as the first two terms of an arithmetic progression.The first term is 12 and is greater than the second term.The sum of the first 3 terms od the arithmetic progression is 4/3 less than the sum of

asked by Lucas
30. ## Math

The measures of two consecutive angles of a parallelogram are in the ratio 5:4. What is the measure of an acute angle of the parallelogram?

asked by Jay
31. ## Algebra

Show how you substitute the values into the formula, then use your calculator. *Use A = P(1+r/n)nt to find the amount of money in an account after t years, compounded n times per year. *Use I = Prt to find the amount of simple interest earned after t years

asked by Sylvie
32. ## Calculus

A spotlight on the ground shines on a wall 12 m away. If a man 2 m tall walks from the spotlight toward the building at a speed of 1.6 m/s, how fast is the length of his shadow on the building decreasing when he is 4 m from the building?

asked by bryan
33. ## physics

A worker can supply a maximum pull of 150 lbs. on a cart which has a handle set an angle of 40degree above the horizontal. what is the coefficient of friction if he can just move a total load of 1500lbs. ?

asked by glindyll
34. ## Maths

An arithmetic and a geometric sequence have the same first terms.(2)....and the same second term say X..The sum of the first 3 terms of the arithmetic sequence equals to the third term of the geometric sequence.Calculate the first 3 terms of each sequences

asked by Lucas
35. ## analytical chemistry

An EDTA solution is standardized against a solution of primary standard CaCO3 (0.5622 g dissolve in 1000 ml of solution) and titrating aliquots of it with the EDTA. If a 25.00 ml aliquot required 21.88 ml of the EDTA, what is the concentration of the EDTA?

asked by Anonymous
36. ## Physics

An object of mass M is used to provide tension in a 4.5 m long string that has a mass of 0.252 kg. A standing wave that has a wavelength equal to 1.5 m is produced by a source that vibrates at 30 Hz. Calculate the value of M

asked by Jasmine
37. ## How to Set Up Equation

Given that the initial rate constant is at an initial temperature of 25 degrees C, what would the rate constant be at a temperature of 130 degrees C for the same reaction described in Part A? What I need help with is how to set up the equation. I have the

asked by Amy
38. ## Algebra

The power in an electric circuit varies inversely with the resistance. If the power is 1200 watts when the resistance is 12 Ohms, find the power when the resistance is 6 Ohms.

asked by Ashley
39. ## Community technical college

Given that 1st term of an A.P is 7 and it's 10th term is twice the second term,calculate the (a) 19th term (b)sum of 28 terms (c) difference between 9th and 6th terms

asked by Benjamin
40. ## Physics

Thomas the train and Diesel are involved in an elastic collision. A 2.5 kg Thomas is, at rest but is approached head-on by a 5.0 kg Diesel moving at 0.60 m/s. The force-separation graph for the ensuing collision is given. (12 marks) What is the total

asked by Khalifa
41. ## Calculus

A boat is pulled into a dock by a rope attached to the bow of the boat and passing through a pulley on the dock that is 1 m higher than the bow of the boat. If the rope is pulled in at a rate of 1 m/s, how fast is the boat approaching the dock when it is 8

asked by bryan
42. ## Physics

A car sounding its horn (rated by the manufacturer at 600 Hz) is moving at 20 m/s toward the eat. A stationary observer is standing due east of the oncoming car. a) What frequency will he hear assuming that the speed of sound is 343 m/s? b) What if the

asked by Patty
43. ## Trigonometry

What is the period and asymptote in y= tan(2x-pi)

asked by Betty
44. ## Calculating Dilutions

1. 1 ml serum added to 5 ml saline. 1:2 dilution is made. What is the dilution of serum in tube 6? So the serum + saline would make a 1:6 dilution. Multiply that by serial dilution of 1:2 which would give: (1/6) x (1/2) x (1/2) x (1/2) x (1/2) x (1/2) =

asked by Anonymous
45. ## physics

In a test run, a certain car accelerates uniformly from zero to 17 m/s in 2.95s. a.) what is the magnitude of the car's acceleration? b.) how long does it take the car to change it's speed from 8.5m/s to 17m/s? c.) will doubling the time always double the

asked by george
46. ## Chemistry

If 25 grams of copper(II) sulfate pentahydrate were heated until all water was removed, how much residue would remain?- Could someone help me understand this question? I don't understand it at all. Thanks

asked by Shadow
47. ## physics

The coefficients of friction between a 250 lb football sled and the grass are Mu(s)=0.6 and Mu(k)=0.4. For grass and cleats, Mu(s)=0.9. One 280 lb tryout exerts a horizontal push of 140 lb on the sled. What is the acceleration of the sled?

asked by Brittney
48. ## physics

A 2.1 kg ball tied to a string fixed to the ceiling is pulled to one side by a force to an angle of è = 26.6 how large is F? tension of string? before it was released

asked by rat boy
49. ## PHYSICS

#1.) If the force of gravity on a human is 539 N determine the mass of the human. #2.) Draw a free body diagram for the following situation: a.) A 0.15 kg running shoe is pushed to the right, with a constant velocity, across a wet concrete floor with an

asked by AMANDAAA
50. ## chemistry

How much heat (in cal) is necessary to heat 27.0 mL of octane (s= 0.526 cal/g ®C ; d = o.703 g/mL ) from 50.6 ®C to 67.2 ®C? I understand the Delta T is = 16.6®C But I don’t know what d stands for (density) or how to apply to the formula.

asked by Joseph
51. ## Physics

Ocean waves are traveling to the east at 4.3 m/s with a distance of 22 m between crests. (a) With what frequency do the waves hit the front of a boat when the boat is at anchor?

asked by Anonymous
52. ## Physics

A guitar string has a tension of 100 N and is supposed to have a frequency of 110 Hz. When a standard tone of that value is sounded while the string is plucked, a beat frequency of 2 Hz is heard. The peg holding the string is loosened (decreasing the

asked by Ryan
53. ## Physics please help!!

A projectile is fired at 45.0° above the horizontal. Its initial speed is equal to 42.5 m/s. Assume that the free-fall acceleration is constant throughout and that the effects of the air can be ignored. What is the maximum height reached by the

asked by Julia
54. ## Physics

In which of the following cases is the frequency of emitted radiation greatest? Electrons jump from third to second orbit Electrons jump from fourth to second orbit Electrons jump from first to second orbit Electrons jump from third to first orbit

asked by gaaaarh
55. ## PHYSICS

#1.) A 3.0 kg computer printer is pushed across a desk at a rate of 0.6m/ s2 (towards the right). Determine the force applied to the printer #2.) If a 0.9 kg apple falls from a tree and hits the ground with a force of 8.82 N calculate the acceleration of

asked by AMANDAAA
56. ## geometry

The measures of two consecutive angles of a parallelogram are in the ratio 5:4. What is the measure of an acute angle of the parallelogram?

asked by Andy
57. ## Algebra I

Here is the question. Medical X-rays, with a wavelength of about 10^-10m, can penetrate completely through your skin. a. Ultraviolet rays, which cause sun burn by penetrating only the top level of skin, have a wavelength about 1000 times the wavelength of

asked by Dar
58. ## physicss

Which of the following is true for a photon? A photon of wavelength 3000 x 10-10 m has momentum twice than a photon of wavelength 6000 x10-10 m. A photon of wavelength 3000 x 10-10 m has momentum twice than a photon of wavelength 6000 x10-10 m. A photon of

asked by physics student
59. ## Physics

A proton and an electron enter perpendicular to the direction of the magnetic field. The speed of the proton is twice the speed of the electron. What is the ratio of the force experienced by the proton to the electron?

asked by Fred
60. ## Biology...

1. References are made by the anatomist to the front,back,head and tail of the body. What anatomical reference terms are used to describe each of these directions? My answer: anterior, posterior, I am not sure with head and tail Is it superior and

asked by Anonymous
61. ## physics

A tortoise and hare start from rest and have a race. As the race begins, both accelerate forward. The hare accelerates uniformly at a rate of 1.2 m/s2 for 4.3 seconds. It then continues at a constant speed for 11.7 seconds, before getting tired and slowing

asked by gerry
62. ## physics

A ballplayer standing at homeplate hits a baseball that is caught by another player at the same height above the ground from which it was hit. The ball is hit with an initial velocity of 23.0 m/s at an angle of 54.0° above the horizontal. How high will

asked by Abdul
63. ## English

1. Why is the agreement in the following sentence incorrect? Neither of the cakes are very expensive. (1 point) The verb should agree with cakes, which is a plural noun. The verb should agree with cakes, which is a singular noun. The verb should agree with

asked by Anonymous
64. ## Spelling

Sort each spelling word by determining if it follows the v/vc or the vc/v pattern tyrant, equal, humor, recent, profile, linen, closet, student, smokey, legal, comet, shiver, minus, loser, punish, cavern, local, decent, vacant, panic.

asked by Jayden
65. ## Computer science

Assume you have a computer that contains 1GB of memory. It contains four memory slots. Each slot can contain 128 MB, 256 MB, 512MB, 1 GB, or 2GB memory modules. two of the slots contains a 512MB memory module. What memory chip would you buy to increse the

asked by Md Farhad Hossain
66. ## Maths

Eric thinks of 2 sequences.One is geometric and the other arithmetic.Both sequences start with the number 3.The common ratio of the geometric sequence is the same as the common difference of the arithmetic sequence.If the 6-th term of the geometric

asked by Lucas
67. ## physics

An 95.0-N crate of apples sits at rest on a ramp that runs from the ground to the bed of a truck. The ramp is inclined at 29.0° to the ground. (a) What is the normal force exerted on the crate by the ramp?

asked by gangam style
68. ## Math

Please explain to me how I can do this .Sarah works in an appliance store. She gets a commission in addition to her hourly pay. She earns a 4% commission for sales up to $4000 and a 7% commission for all sales in a month above$4000. Last month her sales

asked by Jessica
69. ## algebra

Find f(x)·g(x) if f(x) = 3x and g(x) = x + 1. A. 3x2 + 3x B. 3x + 1 C. 4x + 1 D. 3x2 + 1 A

asked by drew
70. ## PLEASE CHECK THESE ANSWERS AMERICAN GOV

1. The nerve center of the American Presidency is (C) the President’s Cabinet. the Executive Office of the President. the Congressional houses. the Civil Service. 2. Presidential elections include all of the following except (D) participatory caucuses.

asked by karen
71. ## Physics ~please help me!

1.) A car (m=1200 kg) moves form 2.0 m/s to 15.0 m/s in 100 m. a) What is the initial kinetic energy of the car? b) What is the final kinetic energy of the car? c) what is the net work applied to the car? d) what force is applied to the car? 2.) A simple

asked by Isis
72. ## mechanics of materials

The following data was obtained from a tensile test of steel. The test specimen was 15mm in diameter and 50 mm in length. Load(kN)/elongation mm) 5 /0.005 10 /0.015 30 /0.048 50 /0.084 60 /0.102 64.5 /0.109 67 /0.119 68 /0.137 69 /0.16 70 /0.229 72 /0.3 76

asked by dmkp

Find the account of simple interest earned if you invest $9000 at 0.04% interest for 20 years. Then find the account balance. asked by Dana 74. ## physics A barge is hauled along a straight-line section of canal by two horses harnessed to tow ropes and walking along the tow paths on either side of the canal. Each horse pulls with a force of 460 N at an angle of 17° with the centerline of the canal. What is asked by Abdul 75. ## Math 1). How many shelves each 2 3/4 feet in length can be cut from a piece of lumber that is 15 2/3 feet long? asked by Maddie 76. ## math On first day you receive 1 cent on the second day 2 cents on the third day you get 4 cents and so on for 28 days. How much would you expect to receive on the last day of the month ? asked by Anonymous 77. ## geometry Triangle ABC and triangle XYZ are similar. If AB, BC, and AC are 7 inches, 9 inches, and 10 inches respectively, and XY is 9 inches, find XZ to the nearest tenth of an inch. asked by Anonymous 78. ## physics sound waves travel faster in humidity than in dry air. But as temperature increases the velocity of sound also increases. So sound travels faaster in hot day than in winter. But during winter there is also presence of humidity in fog. Why doesn't sound asked by edward 79. ## history In order to create heavy industries in Russia, Stalin had his five-year plans. To increase agricultural production in China, Mao had his... A. Great Cultural Revolution B. Red Guards C. Reeducation policy D. Great Leap Forward asked by Beth 80. ## Differential Equations a) Sketch the phase line for the differential equation dy/dt=1/((y-2)(y+1)) and discuss the behavior of the solution with initial condition y(0)=1/2 b) Apply analytic techniques to the initial-value problem dy/dt=1/((y-2)(y+1))), y(0)=1/2 and compare your asked by Erica 81. ## physics What magnitude point charge creates a 13000 N/C electric field at a distance of 0.220 m? asked by taryn 82. ## History NASA, space shuttles, and the International Space Station are (a)all related to Cold War spy technology (b) joint scientific study and space exploration efforts (c) United States efforts to build anti missile defenses (d) belief in extraterrestrial life asked by Beth 83. ## math A video store charges$2.75 per day for overdue videos. You owe a late fee of $13.75. How many days overdue is the video? asked by Bonnie 84. ## SS8R - help! Why.... did Washington accept segregation??? Any good reasons??? asked by Laruen 85. ## Applied Calculus...... Suppose a snowy-tree cricket chirps 180 times per minute if the temperature is 102 degrees, and chirps 120 times per minute when the temperature is 90 degrees. Construct a mathematical model that will predict the number of chirps per minute at a asked by Jacob 86. ## calculus A particle that moves along a straight line has velocity v(t)=(t^2)e^(-2t) meters per second after t seconds.? How many meters will it travel during the first "t" seconds? asked by Anonymous 87. ## mechanics of materials The following data was obtained from a tensile test of steel. The test specimen was 15mm in diameter and 50 mm in length. Load(kN)/elongation mm) 5 /0.005 10 /0.015 30 /0.048 50 /0.084 60 /0.102 64.5 /0.109 67 /0.119 68 /0.137 69 /0.16 70 /0.229 72 /0.3 76 asked by dmkp 88. ## chemistry For the reaction below, Kp = 1.16 at 800.°C. CaCO3(s) CaO(s) + CO2(g) If a 21.7-g sample of CaCO3 is put into a 10.6 L container and heated to 800°C, what percentage by mass of the CaCO3 will react to reach equilibrium? asked by gina 89. ## physics two blocks wood Aand B are coupled spring they are placed on a frictionless table .the spring is stretched and release show that kinetic energy of A divided by kinetic energy of B equal to mass of B divided by mass of ? asked by amruta bante 90. ## A quick algebra question Larry is having dinner at a restaurant that offers 6 different main courses, 7 different side dishes, 4 different drinks, and 4 different desserts. For dinner, Larry will choose a main course, a side dish, a drink, and a dessert. From how many different asked by Mary 91. ## math A fruit seller has an equal number of apples and oranges. He sold 109 oranges and 45 apples.The number of apples left is 5 times the number of oranges left. What is the total number of fruit he had first? asked by May 92. ## Chemistry Hi, Just have follow up questions to the previous questions asked dating Feb. 02, 2013 1. So the overall idea is that dissociation decreases molar mass and association does the opposite when a solute dissolves in a solvent. (How do you identify if either asked by AhmadM 93. ## vocab Using a dictionary look up and then list four definitions of the word nice that you would use in a paragraph to develop this topic sentence: "The word nice is surprisingly ambiguous." asked by Gabriella 94. ## Physics A parallel-plate capacitor is charged by a battery and then the battery is removed and a dielectric of constant K is used to fill the gap between the plates. Inserting the dielectric changes the energy stored by a factor of A)2. B)1/K. C)1 (no change). asked by Liz 95. ## science a stone is thrown vertically upwards fron the edge of a cliff of height 100m, with a velocity of 9m/s. The stone then fall to the ground(the foot of the cluff). Determine the total time the stone will take to hit the ground asked by promice 96. ## Alegebra I I need help with the following questions. Write each answer as a power of 2. Show your work and explain your steps. a. Computer capacity is often measured in bits and bytes. A bit is the smallest unit, which is a 1 or 0, in the computer's memory. A byte is asked by Shawn 97. ## PHYSICS #1.) A 3.0 kg computer printer is pushed across a desk at a rate of 0.6m/ s2 (towards the right). Determine the force applied to the printer #2.) If a 0.9 kg apple falls from a tree and hits the ground with a force of 8.82 N calculate the acceleration of asked by AMANDAAA 98. ## math one bag of rice weighs the same as 2 bags of salt or 3 bags of sugar. How many bags of rice are needed to balance 7 bags of salt and 10 bags of sugar? asked by HELP HELP HELP MNHS 99. ## Statistics A telephone company's records indicate that private customers pay on average$17.10 per month for long-distance telephone calls. A random sample of 10 customers' bills during a given month produced a sample mean of $22.10 expended for long-distance calls asked by Stanley 100. ## English 1. I didn't know you had such great talent in ballet. 2. I didn't know you had such a great talent in ballet. (Which one is correct? Do we have to insert 'a' or not?) 3. Do you really mean it, Dad? (#3 is the answer to the previous statement. What does asked by rfvv 101. ## Corporate Finance By how much must a firm reduce its assets in order to improve ROA from 10% to 12% if the firm's profit margin is 5% on sales of$4 million?

asked by Ingrid
102. ## math

: The manager of a food store wants to create a blend of herbs that she can sell for \$1 per once. She decides to make 8 ounces of a blend of oregano and sage. What will be the ratio of oregano to sage in the mixture?

asked by Anonymous
103. ## geometry

The circle x^2 y^2 2gx 2fy c=0 passes through the points A(-1,-2),B(1,2)and C(2,3). Write down three equation which must satisfied g,f,c.

asked by abews
104. ## Maths and science

The sum of the first n terms of a sequence is given by 4-4(1/2)^n.calculate the first 3 terms

asked by Lucas
105. ## statistics

1. The scores on a standardized test for high school students are normally distributed with a population mean of 500 and a population standard deviation of 100. Use the empirical rule (0LI refers to this as the standard deviation rule.). Make sure you

asked by lay
106. ## Physics please help!!

A person who is 1.4 m tall throws a ball with a speed of 4.2 m/s at an angle of 25 degrees above the horizontal. What are the x and y components of the velocity (in m/s) of the ball the instant before it strikes the ground? The acceleration due to gravity

asked by Julia
107. ## algebra

Simplify the rational expression: x−5 /x 2 −x−20 A. x−4 B. x+4 C. x 2 −15 D 1 /x+4 D

asked by drew
108. ## Social sciences

Find a straight line border in africa south of the equater name the equater name the countries that border separates

asked by Nomphumelelo
109. ## Math

an assembly line worker at Rob's Bicycle factory adds a seat to a bicycle at a rate of 2 seat in 11 minutes. At this rate, how long will it take to add 16 seats? 19 seats?

asked by Charity Harvey
110. ## physics

At t = 0, an automobile traveling north begins to make a turn. It follows one-quarter of the arc of a circle of radius 9.1 m until, at t = 1.84 s, it is traveling east. The car does not alter its speed during the turn.

asked by Abdul
111. ## Chemistry

How to make 10% nitric acid? wouldnt it be 10 mL nitric acid + 100 mL of solvent, making it 10%? What molarity is used it to make 10% nitric acid?

asked by Merlina_Lyn
112. ## Science Fair Project

Can you check for misspelling, punctuation and just to see if it's written correctly?... To sum up, my hypothesis was correct. I predicted that the plant that got the most sun would be the most colorful and the plants that were in the shade every day or

asked by Anonymous
113. ## science

Does the human tongue have definite areas for certain tastes

asked by Marc
114. ## maths

find shortest distance between the line : (x - 8)/ 3 = (y + 19)/ -16 = (z - 10)/ 7 and (x - 15)/ 3 = (y - 29) /8 = (z - 5) / -5

asked by Anonymous
115. ## analytical chemistry

In an experiment for determining water hardness, 75.00 ml of a water sample required 13.03 ml of an EDTA solution that is 0.009242 M. What is the ppm CaCO3 in this sample? Could someone please tell me if this is correct? Total hardness, ppm CaCO3 = mg

asked by Anonymous
116. ## English

1. In the first period, I have a class. 2. At the first period, I have a class. 3. On the first period, I have a class. 4. In the first period, I have class. 5. At the first period, I have class. 6. On the first period, I have class. (Which ones are

asked by rfvv
117. ## history

Homework question:In the 4 centuries following Jesus' death, Christianity (A) excluded women from leadership roles in thechurch (B) rejected all teachings and writings of Jews (wrong0 (C) created a church without a hierachy where all members were equal (D)

asked by JJ
118. ## green lawns

With a chemical test differentiate between H2SO4 and H2SO3

asked by raj
119. ## Differential Equations

a) Sketch the phase line for the differential equation dy/dt=1/((y-2)(y+1)) and discuss the behavior of the solution with initial condition y(0)=1/2 b) Apply analytic techniques to the initial-value problem dy/dt=1/((y-2)(y+1))), y(0)=1/2 and compare your

asked by Erica
120. ## Chemistry

How many moles of H atoms are there in 21.66 g of Mg(OH)2? What is the mass of F (in g) in 8.03 x 1023 BF3 molecules

asked by Shanon
121. ## history

The nations of the world that were formerly victims of imperialism and did not align themselves with either the West or the Communist powers are today called what? A. first world countries B. second world countries C. underdeveloped nations D. developing

asked by Beth
122. ## Math/Fractions

1.Find the LCD and add the fractions. 1/125+4/50= 11/125, 1/1250, 1/35, 551/6250 My answer is 11/125 2.Subtract; then reduce answer to lowest terms. 5/22-1/41= 227/902,183/901,183/902,61/301 My answer is 183/902

asked by Suzy
123. ## Stats

In a qualitative study, which of the following is mostly likely to appear as an outcome of the study?

asked by Anonymous
124. ## algebra

Find the slope between points (4, 6) and (-2, 6). A. 0 B. Undefined slope C. one fourth D. -4 D

asked by drew
125. ## algebra

H(t)= -80t2+340t-260 (in feet) How many seconds will pass before the ball hits the ground?

asked by kat
126. ## Rate Constant - My Work is Incorrect

Hi! I am stuck with this question and I would like to know what I did wrong: Given that the initial rate constant is 0.0160 s-1 at an initial temperature of 25 degrees C, what would the rate constant be at a temperature of 130 degrees C for the same

asked by Amy
127. ## Algebra

14z^2+81z-9

asked by LaShawn
128. ## Science 8R

What is Combustion? this is not homework (please give me a good definition for 8th graders like me to understand) BTW - I'm creating a study guide for the NYS Science Test I'm taking at the end of the year. We started taking notes in my science class that

asked by Laruen
129. ## Math

In a candy shop, the shopkeeper allows the exchange of 3 sweet rappers for 1 new sweet. John has 81 sweets at first. What is the largest possible number of sweets that john could have eaten? (with solution pls... tnx...)

asked by HELP HELP HELP MNHS
130. ## Geography

What is exsolation

asked by Sthembiso
131. ## algebra

Find f o g if f(x) = 2x - 1 and g(x) = x + 2. A. 2x - 3 B. 2x + 1 C. 2x - 1 D. 2x + 3 B

asked by drew
132. ## Physics

An object is thrown vertically upward such that it has a speed of 32 m/s when it reaches two thirds of its maximum height above the launch point. Find the maximum height h. The accelera- tion of gravity is 9.8 m/s2 . Answer in units of m

asked by Preston
133. ## math

one farm is 82 acres larger than another. together the farms contain 276 acres how larg is each farm? solve using two variables and two equations

asked by Taylor
134. ## math

one farm is 82 acres larger than another. together the farms contain 276 acres how larg is each farm? solve using two variables and two equations

asked by Taylor
135. ## geometry

A point is moving in a plane in such a way that its distance from the point(3,0)is 1.5 times its distance from the straight line 3x-4=0.find the louces of the point and identify the conic.

asked by Anonymous
136. ## Physics

A 3 cu ft ballon is filled with air at 90 degrees F. How many cu ft will that same ballon contain one hour after it is taken into an air conditioned room at 70 degrees F?

asked by Mustic Dicko
137. ## Physics

Two blocks hang from strings going around pulleys of different diameter that are connected, as shown in the figure. The large pulley has a radius of R = 9.0 cm and and the small pulley has a radius of r = 2.3 cm. The mass of the block that hangs from the

asked by Anonymous
138. ## physics

The volume of a 100 cu ft air tank at 45 psig is put in a 30 cu ft air tank. What is the gauge pressure in the 30 cu ft air tank?

asked by Mustic
139. ## Chem

A synthesis reaction occurs between 15.0g of gallium and 15.0g oxygen. 1- Write a balanced equation. Ga + 02 --> Gao2 (I got this part) 2- Setup two factor labels to determine the mass of product possible considering each reactant. Please help #2. I don't

asked by yengiang
140. ## Math

In a candy shop, the shopkeeper allows the exchange of 3 sweet rappers for 1 new sweet. John has 81 sweets at first. What is the largest possible number of sweets that john could have eaten? (with solution pls... tnx...)

asked by HELP HELP HELP MNHS
141. ## STATS

Prepare a Venn diagram giving the probabilities for each distinct area; then answer the questions posed. A survey of 168 boys aged 6 to 12 revealed the following information: 74 of them liked chocolate cake, 89 of them liked golden cake and 23 liked both.

asked by Anonymous
142. ## English

I am writing a story and the main characters name is Raine, but I can't find a surname for the life of me! One that sounds good, not super common, and is British. Yeah Google isn't very helpful right now, so I decided to resort to Jiskha! Help please!! :)

asked by Emaleigh
143. ## physics

Calulate the amount of substance in 120g of trioxocarbonate (iv)ion,co2

asked by Evans
144. ## calculus

How do I tell which curve is the top/bot or right/left? I keep getting confused about this. Is it just the right/top most intersection and the bot/left most one?

asked by Daniel
145. ## chemistry

80ml of hcl is added to 2.5gm of pure cac03 when the reaction is over, then 0.5gm cac03 is left. Find the normality of the acid The answer 0.5N Who helps step by step

asked by Fai
146. ## biochemistry

The ΔG¡' of the reaction is -5.31 kJ ámolÐ1. Calculate the equilibrium constant for the reaction. (Assume a temperature of 25¡ C.)

asked by stoic-rider77
147. ## Chemistry

The air we inhale contains O2 we exhale CO2 and H2O does this suggest that our bodily processes invove oxidation? Why?

asked by Loman
148. ## SS8R - help!

Was Booker T. was born in Hale's Ford, Virginia OR Franklin County, Virginia????

asked by Laruen
149. ## Differental Equations

a) Sketch the phase line for the differential equation dy/dt=1/((y-2)(y+1)) and discuss the behavior of the solution with initial condition y(0)=1/2 b) Apply analytic techniques to the initial-value problem dy/dt=1/((y-2)(y+1))), y(0)=1/2 and compare your

asked by Erica
150. ## English

In persuasive writing, it is important to

asked by Mike
151. ## Science Fair Project

is it a good idea to put your variables in your conclusion? My teacher didn't ask for it but I would like to put it.. should I?

asked by Anonymous
152. ## Physics

The volume of a 100 cu ft air tank at 45 psig is put in a 30 cu ft air tank. What is the gauge pressure in the 30 cu ft air tank?

asked by Mustic Dicko
153. ## SS8R - help!

Is there any resourceful sites for kids/teens about Dubios (bio or facts about him). I'm trying to find one....

asked by Laruen
154. ## algebra

Find f(x)·g(x) if f(x) = 3x and g(x) = x + 1. A. 3x2 + 3x B. 3x + 1 C. 4x + 1 D. 3x2 + 1 D

asked by drew
155. ## algebra

Find g of f if f(x) = 2x - 1 and g(x) = x + 2. A. 2x - 3 B. 2x + 1 C. 2x - 1 D. 2x + 3 D

asked by drew
156. ## physics

a cannon fire a .453 kg shell with initial velocity vi=9m/s in the direction 50

asked by Anonymous
157. ## algebra

the distance traveled by the ball is given by D(t)=-5t^2+115t-110 (in feet) how far will the ball travel before it hits the ground?

asked by kat
158. ## Math

(x^4-11x^3+43x^2-40x+19) ÷ (x^2-9)

asked by Bryant
159. ## Chemistry

Is there a chemical formula for animal fats? - Would the lipids chemical formula be the same as animal fats? Thanks

asked by Shadow
160. ## 8th grade science

Good hypothesis for does the human tongue have definite areas for certain tastes

asked by Marc
161. ## physics

Calulate the amount of substance io 120g of trioxocarbonate (iv)ion,co2

asked by Evans
162. ## Spelling

Sort each spelling word by determining if it follows the v/vc or the vc/v pattern

asked by Jayden
163. ## History

After Clovis's death, real power in the Merovingian Dynasty was in the hands of who? A. the nobles B. mayors of the palace C. parish priests D. king's wife

asked by Beth
164. ## biology

How to make structure of DNA ladder like

asked by Petunia
165. ## Guidance and Discipline

Jennifer runs up to Miss Edwards while she is mixing paint and pulls on her arm exitedle.As she does, the paint spills all over the floor.Miss Edwards should

asked by Sandra
166. ## North Hennepin

A 3 cu ft ballon is filled with air at 90 degrees F. How many cu ft will that same ballon contain one hour after it is taken into an air conditioned room at 70 degrees F?

asked by Mustic Dicko
167. ## algebra

Find f o g if f(x) = x + 7 and g(x) = 3x – 2. A. 3x + 5 B. 3x - 5 C. 3x + 19 D. -3x - 19 D

asked by drew
168. ## Statistics

Which of the following conditions doesn't need to be met before you can use a two-sample procedure? The responses in each group are independent of each other. Each group is considered to be a sample from a distinct population. The same variable is measured

asked by Stanley
169. ## computer class

When data, applications, and resources are stored on servers rather than user's computers it is referred to as ?

asked by Beverly
170. ## Algebra

What would be the value of expressing something like the national debt in scientific notation? What information would be lost in such a usage? Is that important? Explain why or why not.

asked by monet
171. ## Ethics

The elderly in the U.S. are growing in number and proportions, with a growing proportion being people of color, how do you think this will impact equity issues for elderly people of color?

asked by Tammy
172. ## maths-urgently needed

A manufacturer lists the price of the goods at Rs.240 per article. The wholesaler ge6ts a discount of 25% on the goods from the manufacturer. The retailers are allowed a discount of 15% on the list price by the wholesaler. The prescribe rate of sale tax at

asked by Anonymous
173. ## Chemistry

I did a lab that involve cooking meat and finding the mass of lipids, meat tissue and water. For a chicken sample the original mass was 20 gram. After cooking there was 15.5g of meat, and 1.5 g of oil, and 1 g of water. I am missing 2 g of the original

asked by Shadow
174. ## Math Algebra

Here the missing Infos ;-)). The Physics of Baseball by Robert Adair - after t seconds, starting 1 sec after 35 angle, rotating with an initial backspin of 2000 revolutions per minute, and hit about 110mph is given by H(t)= -80t^2+340t-260 (in feet) a)how

asked by Kat
175. ## math

one farm is 82 acres larger than another. together the farms contain 276 acres how larg is each farm? solve using two variables and two equations

asked by Taylor
176. ## math

write y= -.5(x+6)(x+3)(x-3) in standard form.

asked by alicia
177. ## Biostats

If the average (xbar) on an assignment in a class was 82% with a standard deviation (s) of 4.8, what is the z-score for someone scoring 75% (round to the one hundredths place or two decimal places)?

asked by brittany
178. ## english

i need to write a historical narrative for school. it has to have dialogue and be in any persons viewpoint from the great depression and world war 2. it has to revolve around a specific climax or such. so i need some help coming up what to write about!

asked by jacob
179. ## Physics please help!!

The launching speed of a certain projectile is 9.0 times the speed it has at its maximum height. Calculate the elevation angle at launching.

asked by Julia
180. ## algebra

If f(x) = 2x and g(x) = ½ , calculate f(x) • g(x) A. x B. x2 C. 2x D. 2x2 I say B

asked by drew
181. ## chemistry

how many grams of lithium bromide are in 0.79 mol.of lithium bromide?

asked by Anonymous
182. ## Math

Show that the tangent to the curve 25x^5+5x^4-45x^3-5x^2+2x+6y-24=0 at the point (-1,1) is also a normal at two points of the curve.

asked by Avik
183. ## Easy algebra

Mike is testing new batteries to determine if the batteries last as long as advertised. The actual life of one of the batteries was only 4 weeks, 2 days, and 13 hours even though the advertisement claimed it would last 3,000 hours. What was the difference,

asked by Mary
184. ## Math 8R

If there was a mobile lunch table used at a high school. Approximately how many students can per table? (The question asking is that there's a mobile table. They sometimes use mobile tables *round tables* in high school. How many students can sit in one

asked by Laruen
185. ## Ap calc

F(x)= (2x-5)^3

asked by Trent
186. ## literary

Protagonit

asked by Love
187. ## chemistry

i have some question but i can not post it ,what should i do .help

asked by zak
188. ## Math

Ten boys are to share 3 3/4 pounds of candy equally. How much candy does each boy get?

asked by Maddie
189. ## math

In rhombus ABCD, diagonals AC and BD are drawn. If the rhombus is graphed on a coordinate plane the slope of AC is 3/5. What is the slope of BD? Explain how you know.

asked by Steph
190. ## Title for science fair project

what's a good title for: Does light affect the pigment of the leaves?

asked by Anonymous
191. ## math

how tall would a statue of a 5 foot 6 inch woman be if the scale for the statue is 1 foot 8 inches

asked by liz
192. ## physics

A 3 cu ft ballon is filled with air at 90 degrees F. How many cu ft will that same ballon contain one hour after it is taken into an air conditioned room at 70 degrees F?

asked by Mustic
193. ## organic chemistry

how do I to draw cyclopropane of bond rotation?

asked by sjlual
194. ## Science 8R

Endothermic reactions are ..... what??? This is not homework.

asked by Laruen
195. ## Computer science

3.We often come across the terminology like 6b-bit processor, 64-bit operating system and 64-bit system bus. Do you understand those terminologies? What exactly those numbers represent? Please find out the exact meaning of three terminologies above (give

asked by Md Farhad Hossain
196. ## Calculus

show that the tangent to the curve f:f(x)= x^2-x at the point p1(0,0) is perpendicular to the tangent to the curve at p2(1,0)

asked by Anonymous
197. ## english102

i need help writing a secondary argumentative research paper ,i need a really strong thesis.what about one for poverty and education

asked by pam
198. ## Math

How can I find the asymptotes of [f(x) = 1/ (1+e^-x)]?

asked by 009
199. ## chemistry

An object has a KE= 18000 and a massof 98kg what is the speed of the object

asked by alexis
200. ## Chemistry

How many moles of OCl2 contain 38.42 g of Cl? Answer

asked by Shanon
201. ## math

Divide: 3x - 15/14y ÷ x^2 -15x + 50/7

asked by Anonymous
202. ## math

there are three proposed triangular courses for the beginner sailors. The lengths of each leg of the race and the distance from the starting line to the finish line for each proposed course are listed below. Which course would be appropriate for the right

asked by brooke garcia
203. ## English II

I have to write an satire and I am doing it on the movie The Help.

asked by Dee
204. ## chemistry

can u tell me whats the most imprtant subject i need to know for molecular composition of gases ? and for physical characteristics of gases?

asked by phebbie
205. ## math

2 2/3 + 7 3/4= rename or simplify as needed, I need to show how I got this answer HELP PLEASE

asked by Jared
206. ## math

4 5/8 + 9 3/5 = need to show how I got answer I know that the Lcd is 40 and then it is 25/40 + 24/40= 49/40 and then I don't know what to do from there

asked by Jared
207. ## Physics

Two resistors 3 Ù and 6 Ù are connected in parallel across a 6 V battery. What is the current flow through the 3 Ù resistor?

asked by Maddy
208. ## Math

In rhombus DFGH, m

asked by Steph
209. ## algebra

Find g o f if f(x) = x + 7 and g(x) = 3x – 2. A. 3x + 5 B. 3x - 5 C. 3x + 19 D. -3x - 19 C

asked by drew
210. ## 7th grade Language (probably easy to answer)

In the sentence ' Andy has driven many types of vehicles that have various controls.' What would many types, be? (Adverb,verb,pronoun,ect.) Also... In the sentence ' The car has a lot of blind spots which make it difficult to turn safely.' What would lot,

asked by Emmaline
211. ## history

an official permit? a source for tobacco. residents of the Jamestown are before 1607?

asked by nicole
212. ## History

a source for tobacco

asked by nicole
213. ## algebra

(a-3)(a+7)=-9

asked by LaShawn
214. ## SS8R - help!

What type of odd jobs Booker T. worked at while to travel to Hampton to go to Hampton Institute????

asked by Laruen
215. ## algebra

5y(y+7)=7(y+7)

asked by LaShawn
216. ## maths

find the mean number of heads in 3 tosses of a fair coin?

asked by Anonymous
217. ## science

factors affecting child development

asked by Anonymous
218. ## Computer

what is a computer?

asked by Raf
219. ## Math

In the Math department of a school, 10 teachers have YM accounts, 13 have GM accounts, and 6 have both accounts. How many teachers in Department have YM or GM accounts?

asked by HELP HELP HELP MNHS
220. ## Math

What is the second derivative for [f(x) = 1/(1+e^-x)]?

asked by 008
221. ## maths

find the mean number of heads in 3 tosses of a fair coin?

asked by Anonymous