# Questions Asked onOctober 21, 2010

An ice cube that is 3 cm on each side is melting at a rate of 2 cm cubed per minute. how fast is the length of the side decreasing?

2. ## Psychology ; the mind at work

1. If you look at a photograph for a short time and then look away from it, your trace memory of the image will A. generally fade away in about a second. B. typically form a lasting memory. C. generally last about as long as the time you looked at the

3. ## AP CHEM

Complete and balance the reaction Al(s) + Pb2+(aq) ! using the smallest possible integers. I got: 2Al(s) + 3Pb2 ==> Al2Pb3 Calculate the standard free energy. Faraday’s constant is 96485 J V · mol Answer in units of kJ/mol. I know the formula is -nFE

4. ## physics

just a couple more questions 1.) The power needed to accelerate a projectile from rest to is launch speed v in a time t is 43.0 W. How much power is needed to accelerate the same projectile from rest to launch speed of 2v in a time of 1/2t? 2.)A ball is

5. ## chemistry

Find the emf for the cell Cr(s) |Cr3+(aq, 0.37 M) || Pb2+(aq, 0.0095 M) | Pb(s). Answer in units of V I don't know what to do

6. ## physics

In the vertical jump, an Kobe Bryant starts from a crouch and jumps upward to reach as high as possible. Even the best athletes spend little more than 1.00 s in the air (their "hang time"). Treat Kobe as a particle and let ymax be his maximum height above

7. ## statistics

Suppose only 75% of all drivers in a certain state regularly wear aseat belt. A random sample of 500 drivers is selected. What is theprobability that a). Between 360 and 400 (inclusive) of the drivers in the sampleregularly wear a seat belt? b). Fewer than

8. ## physics

A Ferris wheel with radius 8.8 m rotates at a constant rate, completing one revolution every 34.6 s. Suppose the Ferris wheel begins to decelerate at the rate of 0.212 rad/s2 when a passenger is at the top of the wheel. Find the magnitude and direction of

9. ## Math

Solve:(sec 35 degrees) (csc 55 degrees) - (tan 35 degrees) (cot 55 degrees)

10. ## Physics

The toy car in figure 6-12 runs off the edge of a table that is 1.225-m high. The car lands 0.400m from the base of the table a.How long did it take the car to fall? b.How fast was the car going on the table?

11. ## math

the ratio of hydrogen atom to oxygen atoms in water is 2:1 if an amount of water contains 341 trillion atoms of oxygen how many hydrogen atoms are there? how would i do this?

12. ## Physics

A 100-N force has a horizontal component of 80 N and a vertical component of 60 N. The force is applied to a box which rests on a level frictionless floor. The cart starts from rest, and moves 2.0 m horizontally along the floor. What is the cart's final

13. ## ap chemistry

Find the emf for the cell Cr(s) |Cr3+(aq, 0.37 M) || Pb2+(aq, 0.0095 M) | Pb(s). Answer in units of V I got .548733V Is this right?

14. ## Chemistry

Which compound forms a colored aqueous solution? a) CaCl2 c) NaOH b) CrCl3 d) KBr i think its Cr because its an transition metal. but im not sure.

15. ## chemistry

the half-life of radon-222 is 3.823 days. what was the original mass if 0.050g remains after 7.646 days?

16. ## Literature/The Crucible

Can you help me with these two questions thanks. Acts 1 and 2 Cause and effect relationships The Crucible Directions: Fill in the blanks to show what happened (effect) as a result of specific action (cause) 1. Because Sarah Good had mumbled in Mary

17. ## physics

The velocity of a particle constrained to move along the x-axis as a function of time t is given by: v(t)=-(13/t_0) sin(t/t_0). a)If the particle is at x=4 m when t = 0, what is its position at t = 5t_0. You will not need the value of t_0 to solve any part

18. ## physics

Two children are balancing on a teeter-totter. One child has a mass of 30.0 kg and is sitting 1.3 meters from the pivot. The second child is sitting 0.8 meters from the pivot. What is the mass of the second child

19. ## statistics

The Computer Anxiety Rating Scale (CARS) measures an individuals level of computer anxiety, on a scale from 20 (no anxiety) to 100 (highest level of anxiety). Researchers at Miami University administered CARS to 172 business students. One of the objectives

20. ## Chemistry

Calculate the [H3O+] of each of the following H2SO4 solutions. For a 0.50 M soln How do I reach the answer? Do I have to use a ice table?

21. ## chemisty

what will be the mass of angydrous Alum left over if one starts with 100.00 g of hydrated Alum? please can you explain what fraction do I need to use. Based on the given information I can find the %theoretical of water in angydrous Alum. But I still don't

22. ## physics

Two children are balancing on a teeter-totter. One child has a mass of 30.0 kg and is sitting 1.3 meters from the pivot. The second child is sitting 0.8 meters from the pivot. What is the mass of the second child

23. ## physics

A daredevil jumps a canyon 10.6 m wide. To do so, he drives a car up a 19° incline. (The daredevil lands on the other side of the canyon at the same elevation as takeoff.) What minimum speed must he achieve to clear the canyon?

24. ## chemistry

Find the emf for the cell Cr(s) |Cr3+(aq, 0.37 M) || Pb2+(aq, 0.0095 M) | Pb(s). Answer in units of V I don't know what to do

25. ## math

The length of Laurie's rectangular swimming pool is triple its width. The pool cover an area of 192 m2. If Laurie swims across the diagonal and back, how far does she travel?

26. ## Chemistry

Suppose you are standing 201 m from a radio transmitter. What is your distance from the transmitter in terms of the number of wavelengths for the following conditions? (a) The station is broadcasting at 1150 kHz (on the AM radio band)? (1 kHz = 1

27. ## chemistry

what will be the mass of angydrous Alum left over if one starts with 100.00 g of hydrated Alum?

28. ## College Chemistry

Which is the correct form of equilibrium expression of the following reaction. 2PbS(s)+3O2(g)reverse arrow 2PbOs + 2SO2g Why is the answer Kc= SO2 power 2/O2 power 3 Why in particular is this the arrangement for equilibrium expression? Thank you

29. ## Chemistry

1. When a potassium atom reacts with a bromine atom, the bromine atom will a) lose 1 electron and form a positive ion b) lose 2 electrons and form a positive ion c) gain 1 electron and form a negative ion d) gain 2 electrons and form a negative ion I know

30. ## Physics

Along the remote Racetrack Playa in Death valley, California, stones sometimes gouge out prominent trails in the desert floor, as if they had been migrating. For years curiosity mounted about why the stones moved. One explanation was that strong winds

31. ## economics

Two people enter a bus. Two adjacent cramped seats are free. Each person must decide whether to sit or stand. Sitting alone is more comfortable than sitting next to the other person, whihc is more comfortable than standing. a.) Suppose that each person

32. ## Statistics

As standard deviation increases, samples size _____________ to achieve a specified level of confidence. A. Increases B. Decreases C. Remains the same

33. ## physics

A daredevil jumps a canyon 10.6 m wide. To do so, he drives a car up a 19° incline. (The daredevil lands on the other side of the canyon at the same elevation as takeoff.) What minimum speed must he achieve to clear the canyon?

34. ## College Organic Chemistry

Why are fractionating towers in a refinery always tall?

35. ## chemistry

Problem#9: Consider the fuel octane (the main component of gasoline) and its combustion reaction 2C8H18(l) + 25O2(g) → 16CO2(g) + 18H2O(l) ΔHo = -10,942 kJ The “fuel value” of a fuel (unit kJ/g) is defined as the energy released when 1 g of the fuel

36. ## Ap Chemistry

Find the emf for the cell Cr(s) |Cr3+(aq, 0.37 M) || Pb2+(aq, 0.0095 M) | Pb(s). Answer in units of V I kept getting .55V but it is wrong. Can someone please help me?

37. ## algebra II

An aircraft flew 6 hours with the wind. The return trip took 7 hours against the wind. If the speed of the plane in still air is 276 miles per hour more than the speed of the wind, find the wind speed and the speed of the plane in still air. The wind soeed

38. ## AP Chem

Calculate the average kenetic energy of the CH4 molecules in a sample of CH4 gas at 273K and at 546K. So, should I have two answers or one? Super confused

39. ## chemistry

Find the emf for the cell Cr(s) |Cr3+(aq, 0.37 M) || Pb2+(aq, 0.0095 M) | Pb(s). Answer in units of V Can someone please help me? I have the equation: 2Cr +3Pb(+2) --> 2Cr(+3) + 3Pb

40. ## math

There are a total of 152 foreign language students in a high school where they offer only Spanish, French, and German. You are given the following details for this semester: 58 take Spanish. 71 take French. 66 take German. 9 take Spanish and French but not

41. ## trig

how do you establish the identity of cos(3pi/2+0)=sin0

42. ## math

there are 4 girls in Mrs. Changs class than Mr. Blackwell's. 5 girls moved from Mrs. Changs to Mr. Blackwells. Now there are twice as many girls in Mr. Blackwells class as there are in Mrs. Changs, How many girls were in Mr. Blackwells class to begin with?

43. ## english

What is the term for the character in conflict with the main character?

44. ## Physics - Height of ball launch

A solid ball of mass m and radius r rolls without slipping through a loop of radius R, as shown in the figure. From what height h should the ball be launched in order to make it through the loop without falling off the track? (Use any variable or symbol

45. ## science

A 30kg girl and a 25 kg boy face each other on friction free roller blades the pushes the boy who moves away at a speed of 1.0m/s the girl's speed is m/s?

46. ## Physics

A sports car accelerates from rest to 89 km/h in 6.1s . What is its average acceleration in

47. ## College Chemistry

If 10.6 mol of carbon monoxide is produced how many grams of carbon were used? How do you convert moles to grams? And what are the steps please for the answer.

48. ## Physics

If you are driving 100km/h along a straight road and you look to the side for 1.9s , how far do you travel during this inattentive period?

49. ## physics

An athlete at the gym holds a 1.2 kg steel ball in his hand. His arm is 64 cm long and has a mass of 4.0 kg. What is the magnitude of the torque about his shoulder if he holds his arm in each of the following ways? 1. straight but 30 degrees below

a hopper jumps straight up to a height of 0.45m. with what velocity will it return to the table?

51. ## physics

A football punter accelerates a 0.54 kg foot- ball from rest to a speed of 8.7 m/s in 0.24 s. What constant force does the punter exert on the ball? Answer in units of N

52. ## physics

A 90g arrow is shot straight up into the air with a spped of 23 m/s. It reaches a maximum height of 25.9898m. Find the initial kinetic energy. the acceleration of gravity is 9.8 m/s2. Answer in units of J. Find the potential energy at its highest position.

53. ## PHYSICS

A model rocket is constructed with a motor that can provide a total impulse of 25.5 N · s. The mass of the rocket is 0.213 kg. What is the speed that this rocket achieves when launched from rest? Neglect the effects of gravity and air resistance.

54. ## alegra.

A boat cruises 36 miles against a 3 mph current and 36 miles back in the direction of the same current. The round trip takes 5 hours. What is the speed of the boat in the still water? use d=rt

55. ## calcus

Sketch the regions enclosed by the given curves. Decide whether to integrate with respect to x or y. Draw a typical approximating rectangle and label its height and width. integrate with either respect to x or y, then find area S of the region given that

56. ## PHYSICS

A student (m = 63 kg) falls freely from rest and strikes the ground. During the collision with the ground, he comes to rest in a time of 0.0170 s. The average force exerted on him by the ground is +16500. N, where the upward direction is taken to be the

57. ## Calculus

Sketch the regions enclosed by the given curves. Decide whether to integrate with respect to x or y. Draw a typical approximating rectangle and label its height and width. integrate with either respect to x or y, then find area S of the region given that

58. ## Physics

A 1.95 kg block is held in equilibrium on an incline of angle q = 53.1o by a horizontal force, F, applied in the direction shown in the figure below. If the coefficient of static friction between block and incline is ms = 0.313, determine the minimum value

59. ## English

Please check this paragraph.please. Wrongdoing and wickedness are as old as first man born in the world. These problems are so great that man cannot cope with it himself. Man can not escape way from wrongful act and the bad conscience without the help of

60. ## physics

An athlete at the gym holds a 1.2 kg steel ball in his hand. His arm is 64 cm long and has a mass of 4.0 kg. What is the magnitude of the torque about his shoulder if he holds his arm in each of the following ways? 1. straight but 30 degrees below

61. ## physics

A 4600 kg helicopter accelerates upward at 2.26 m/s2. 2 The acceleration of gravity is 9.8 m/s . What lift force is exerted by the air on the propellers?

62. ## physics

A 435 N box is sliding down a 40 degree incline. If the acceleration of the box is 0.250 m/s^2, what is the force of friction on the box?

63. ## English

Is this a simile or a metaphor The rain felt like small kisses on Rosemary's face,

64. ## physics

You inflate your car tires to a gauge pressure of 2.43 atmospheres at a temperature of 24 degrees C. After driving a couple of miles the temperature of the tire increases by 46 degrees C. What is the new gauge pressure to the nearest hundredth of an

65. ## PHYSICS

A stream of water strikes a stationary turbine blade horizontally, as the drawing illustrates. The incident water stream has a velocity of +18.0 m/s, while the exiting water stream has a velocity of -18.0 m/s. The mass of water per second that strikes the

81. ## physics

A model rocket is constructed with a motor that can provide a total impulse of 25.5 N · s. The mass of the rocket is 0.213 kg. What is the speed that this rocket achieves when launched from rest? Neglect the effects of gravity and air resistance.

82. ## Math

If f(x)=x^2-6x+14 and g(x)=-x^2-20x-k, determine the value of k so that there is exactly one point of intersection between the two parabolas.

83. ## Science

Give the condensed structural formula for 1-butanol

84. ## Algebra

find the x and y intercepts: 3x - 2y = -12 i know for the x intercept, put y=0 in the equation,s olve for x. For the y intercept, do the reverse. But i still don't understand how to solve it. Its just majorly fustrating me. And i can't go to school and ask

85. ## calculas

If a ball is thrown vertically upward from the roof of 48 foot building with a velocity of 80 ft/sec, its height after t seconds is s(t)=48+80t–16t2. What is the maximum height the ball reaches? (my answer is 148). What is the velocity of the ball when

86. ## math

solve the equation giving your answer in correct to 2 decimal places 5x square+4x+1=3(1-3x)

87. ## Math

Jarrels goal is to be half finished with the book he is reading by friday. By wednesday he has read 1/3 of the book.How much more does he need to read to meet his goal?

88. ## geography

The connections between the countries of the world are likely to increase in the future. is this true or false

89. ## Calculus

a populatioin of bacteria has an initial size of 500. the population doubles every 7 hours. a) how many bacteria will there be after 10 hours b) when will there be 3000 bacter? I keep getting answers that just don't make sense. Can someone do these out for

90. ## physics

Hi: I need help with the following physics problem. Can you explain it to me? Thank you, The fastest measured pitched baseball left the pitcher's hand at a speed of 50.0 . If the pitcher was in contact with the ball over a distance of 1.50 and produced

91. ## Statistic

11.5 Consider an experiment with four groups with eighth values in each. For the following ANOVA summary table, fill in all the missing results. Source Degree of freedom Sum of Square Mean Square(Variance) F

92. ## Physics

A person pushes horizontally with a force of 270 N on a 55 kg crate to move it across a level floor. The coefficient of kinetic friction is 0.25. What is the magnitude of the frictional force? What is the magnitude of the crate's acceleration?

93. ## math

a model airplane flies 18 feet in 2 seconds what is the airplanes speed in miles per hour round you answer to the nearest hundredth how would i do this

94. ## Chemistry

Which of the following elements has an ionic radius greater than its atomic radius a) Ca c) Fe b) Li d) N

95. ## Writing

Does my thesis statement sound ok? Deforestation should no longer go on, because endangered species are close to extinction, less oxygen is being produced, and global warming is turning into a bigger issue because of it.

96. ## chemistry

the heat of this reaction,Na + 1/2 Cl 2 NaCl, is 98.3 kcal/mole what is the heat given off two moles of NaCl are formed ?

97. ## Science

A block is released from rest on a 45 degree incline and then slides a distance "d". If time taken to slide a rough incline in "n" times as large as that to slide on a smooth incline. Find the coefficient of friction.

write the following expanded notation in standard form. 600+50+4+0.2+0.07+0.009 ?? Build a 4 digit numeral. write 3 in the hundreths place 4 in the tens place 6 in the ones place,and 9 in the tenths place . ___ ___ ___ ___ please !help me with these to

99. ## note to those with unanswered physics questions

I have only been able to answer a few tonight. Preference is and will be given to questions in which evidence of work or thought is shown by the person posting the question.

A marathon race has 522 runners divided into 6 groups. What is a reasonable number of runners in each group? A 112, because 522/6 is about 550/5=110 B 98, because 522/6 is about 500/5=100 C 87, because 522/6is about 540/6=90 D 82, because 522/6 is about

101. ## Chemistry

A 112 mL solution of 0.351 M HCl is added to 52.0 mL of 0.161 M HCl. What is the new concentration of HCl?

102. ## physics

If you are driving 100 along a straight road and you look to the side for 1.9 , how far do you travel during this inattentive period?

103. ## chemistry

Problem#8: Metabolism of alcohol (ethanol, C2H5OH) by the body takes place according to the reaction: C2H5OH(l) + 3O2(g) → 2CO2(g) + 3H2O(l) ΔHo = -1367 kJ Determine the number of “food calories” (Cal) supplied by the alcohol in a 12-oz (355-mL)

104. ## Math 12

trig question 2sin^2x+sinx-6=0 how to solve for x when the restriction is x is greater than or equal to zero but less than 2pi

105. ## physics

From the top of a tall building, a gun is fired. The bullet leaves the gun at a speed of 340 m/s, parallel to the ground. The bullet puts a hole in a window of another building and hits the wall that faces the window. (y = 0.42 m, and x = 7.2 m.)Determine

106. ## math

find the vertex and axis of symmetry for y = x^2 - 6x + 7

107. ## math word problem

A rectangular bathtub with a base of 18 ft^2 is filling with water at a rate of ..7ft^3 per minute. How fast is the water level rising after 3 minutes?

108. ## algebra

train A and B are traveling in the same direction on parallel tracks. train A is going 80 miles per hour train B is going 84 miles per hour. train A past a station at 2:15 am train B passes at 2:45 am what time will train B catch train A

109. ## Math

The highest point in NewOrleans, Louisiana is 15 feet above sea level.The Lowest Pont is 4 feet below sea level. Howmuch higher is the highest point than the lowest point ? How would you explanin this? Whats the Answer

110. ## english

My fiancé does not think he needs a credit card right now. We are already in enough debt. It has actually consumed our lives. Although most of the debt we have is his. I have my debts too, but they are much smaller. This is why he does not need a credit

111. ## History

In their reporting of elections, the media tend to place cendidates and issues in the context of

112. ## test

grammar --verbs ) a helping verb is the verb that help the main verb make its statement(true or false)

113. ## physics

E^2/(e^(E/T)-1)Evaluate dn/dE at fixed T and enter it below.

114. ## algebra

a passenger train's speed is 60mi/h, and a freight train's speed is 40mi/h .The passenger train travels the same distance in 1.5 h less time than the freight train. how long does each train take to make the trip?

115. ## math

how far from the base of a 10ft ladder be placed so that it reaches 8ft up the wall

116. ## History

Which statement is not a benefit of increased development? 1) improved access to health care 2) increased wealth 3) more even distribution of resources 4) reduced unemployment aren't all of these benefits?

117. ## Math

solve: (square root of 3) sin(theta) + cos(theta) = 1 Thanks! :)

118. ## 8th grade pre algerbra

problem solving investigation: draw a diagram problem: kelly is using 3-inch square tiles to cover a 4-foot by 2-foot area the tiles are 0.5 inches tall if the tiles were stacked on top of each other to create a tower, how many inches tall would the tower

119. ## Spanish

There's no shoe verbs for Vestirse (reflexive) in the preterite right?

120. ## math

one number is three more than a second number. Three times the first is 7 less than 2 times the second. Find the numbers. The value of the second number is ___

121. ## chemistry

What is the wavelength of a photon with an energy of 6.35 10-19 J? (The speed of light in a vacuum is 2.998 108 m/s. Planck's constant is 6.626 10-34 J·s.)

122. ## Stats

A random sample of two hundred fifteen adults is selected from a certain population of registered voters. Assume the population is 20% democrats. Use a normal approximation to estimate (a) the probability the sample contains exactly 48 democrats, and (b)

123. ## Chemistry/English

In chemistry we are writing a paper about an inventor.. We have to have some back ground info.. what they invited. how there time affected there inventions and if there inventions where a great success and so on so forth. What would be a good way to set

124. ## social studies

How did the Chinese Exclusion Act nd the Gentleman's Agreement limit the Asian immigration?

125. ## Chemistry

24. A quantum is a finite amount of energy gained or lost by an atom.- F? 25. An atom is in an excited state when it has its lowest energy.- F 26. The Bohr model of the atom shows electrons in areas called energy levels.- F? 27. The principal quantum

126. ## math

write a number pattern for 8 star fish if each has 5 arms

A spider sits on its web, undergoing simple harmonic motion with amplitude A.What fraction of each cycle does the spider spend at positions with x>0.75A? Hint: Use the analog of uniform circular motion.

128. ## Enaglish

Please check this paraph We know that every man commits sins. There is no way that we can Undo our mistakes. It is only possible through the salvation . God likes those people who seeks His mighty forgivenss after committing sins, He don’t like those who

129. ## Math

How would you complete 7000 hundred thousandths=? hundredths

130. ## physics

A solid disc with radius R is is spinning. An object exerts a force F at the edge of the disc to slow down the disc. The disc slows down to rest in 2.0 seconds. How long would the disc take to stop if: the mass of the disc doubled in s the radius of the

131. ## algebra

Find the x and y intercepts: 3x - 2y = -12 i know the anwser is (2 , -3) but how do i show the work that i found that anwser?

132. ## calculus word problem

a conveyor belt pours gravel into a pile at a rate of 20 lbs per minue. the pile is shaped like an upside-down cone. the proportions of the cone are such that when the pile is complete, the diameter of the base is 6 ft and the height is 10 feet. how fast

133. ## MATH

FIND THE MEASURE OF A COMPLEMENT OF AN ANGLE THAT MEASURE 65DEGREES

134. ## algebra help

Two motorcyclists start at the same point and travel in opposite directions. One travel 3 mph faster than the other. In two hours they are 206 miles apart. How fast is each traveling? The speed of the slower motorcyclist is ___ mph.

135. ## Physics

A uniform solid cylinder of mass M = 2 kg is rolling without slipping along a horizontal surface. The velocity of its center of mass is 27.6 m/s. Calculate its energy. I got 761.76 Joules but I think it's wrong.

136. ## math

how to find the values of x?? x^2 - 3x - 7 = 0 tried quadratic formula and completing the square what else can i do??

137. ## mkt 230

As a marketing consultant, you are frequently asked by clients to develop recommendations for marketing communication strategies. The traditional elements used include advertising, sales promotion, public relations, and personal selling. Which of these do

138. ## economics

what does diversification do to risk?

139. ## social studies

This is regarding compare and contrast. The choices are 3 areas to build your home, Montains, Valley far from a river, and Sandy area near steep rocks. Compare and contrast 2 choices. then tell where you will build your house and why.

140. ## chemistry

How many moles are in a sample of cobalt containing 5.0x10^23 atoms?

141. ## biology

in biology we are studying taxonomy. we are classifying our organisms by broadest to most specific: kingdom phylum class order family genus species how would i do this for a Siberian tiger?

142. ## calculus

The population of less-developed countries in mid-2007 of 4086 billion expected to grow at 1.8% per year, If this growth rate continues until mid-2025, what will be the size of the population then?

143. ## ethics of law

I have to write an essay and I am stuck on one part that asks "describe the nature of ethics and their role in policing?" Help is greatly appreciated.

144. ## logistics

For the logistic model f(x)=3x(1-x), if the starting fraction is 0.7, what will the next population fraction be?

145. ## Science

Which one is different in the catergories? Plus, could you calssify the rest in the group, without the circled one? A. wheelbarrow B. wagon C. car -- --- D. shopping cart -- -------- ---- I think that the answer is D. shopping cart whing is uderlined or C.

146. ## physics

A planet is 400 times more massive than the earth, and its radius is 10 times that of the earth. The weight of an object on the surface of the planet is?

147. ## macroeconomics

Not really lookign for the answers btu moer of the fomrula or how to find the answers if ok. thank you The table below shows the United States components of M1 and M2 in billions of dollars for the month of December in the years 1998 to 2007 as published

148. ## Chemistry 1

What is the minimum amount of a 6.0 M solution of sulfuric acid necessary to produce 25 grams of hydrogen gas if the molar ratio in the chemical reaction is a 1:1

149. ## Algebra

in a dartboard ther r 2 circles,one large circle n a smaller shaded one inside the larger one. the large circle has a radius of 2 feet n the smaller circle has a diameter of 2 feet. if a dart os thrown at the board wats the probibility that it will land in

How do find the speed of a marble after falling from rest a distance of 1.2 m?

151. ## Calculus

If f(x) = 2 √x, use the definition of derivative to find f′( x )

152. ## math

a vehicle uses 1 tablespoon of gasoline to drive 125 yard how many miles can the vehicle travel per gallon? a model airplane flies 18 feet in 2 seconds what is the planes speed per miles an hour? how do i do these

153. ## calculus

If f(x)=(x^2+3x+2)^3, find f'(x).

237. ## chemistry

how many atoms are in 26 moles of Ag

how can you model 624 without using hundreds

239. ## us history

what foods where in the new world before the columbian exchange?

240. ## math

A carpenter used 3 3/16 pounds of nails for a job. After the job was over, the remaining ails weighed 1 1/16 pounds. How many pounds of nails di the carpenter have at the beginning of the job? PLEASE HELP!

241. ## Math

how do you show your work for long division this is the question 61.2 % -7.2

242. ## calculus

solve tis 5x^+4x+1+3(1-3x)

243. ## legal aspects of business

research an American firm/corporation that has been affected or is in the process of responding to recent shifts in international policies and regulations as they relate to foreign investment. Summarize your findings in 5-7 paragraphs. Write an additional

245. ## Math

There are 80 players at the baseball tryout. 5 players are not trying out b/c of injuries, 15 are trying out for pitcher or catcher and 6 are trying out for a feilding position that excludes pitcher and catcher, whats the probliblity that a player is tryin

246. ## Organic Chemistry Lab

For the "ISOLATION OF CHLOROPHYLL AND CAROTENOID PIGMENTS FROM SPINACH" Lab we have to think about how we can correct the following if they were to occur: - A two component mixture containing dicarboxylic acid and a tricarboxylic acid gave only one spot

247. ## Organic Chemistry Lab

How do we correct the problem if during TLC development the solvent ran off the plate?

248. ## US history

For what reasons was the Tweed Ring so notoriours?

249. ## algebra

I'm working with absolute values, and for some reason I'm just really stumped by this problem. 7=|3x+9|+7 I don't see how I can get any number that will make the equation equal 7?

250. ## math

c - 9/10 = 1/3 c= 1 1/15?

what hatchet

252. ## probability!

we were given a chart - "researchers developed the following tabel of joint probabilities of number of drinks per day and development of ulcers" and the question is a. what proportion of people have ulcers - how am i supposed to know htis b. what is the

253. ## arithmetic

Arithmetic 8.4-2

Why do your favorite teachers always leave?

255. ## math

April rode 12.3 miles on her bicycle on Monday. Which is the best estimate of the totl distance April will ride if she rides the same distance each day for 7days? A 84 B 91 C 105 D 120

256. ## math

How many solutions satisfy the equation |3x-2|=|x|?

257. ## math

find the unit rate. 400 cm to 1m

258. ## math

p - 3 2/3 = 1 1/3 p= 4 3/3 then do I simifly that ?

259. ## grammar

Please bring the pens to Julio and

What does Air Mass Consist of?

261. ## world history

compare Byzantine society to rome

277. ## math

In Harry's attic there are three spider webs. The first web is twice as large as the second web. The third web is 3 inches larger than the first web. The combined width of the three webs is 1 foot and 6 inches. Aunt is stumped again!

278. ## math

If f(x)=(3x+6)^–1, find f'(x).

279. ## College Organic Chemistry

Suggest what would be the result if we heated a mixture of dichloromethane and naphthalene to 60 degrees Celcius, collected distillate until no further material distilled, and then cooled the flask back to room temperature.

280. ## Inequalities

I'm looking a problem in my textbook and I don't understand how it goes from one step to another. It starts out as: (120 * 2^5)/(180 * n^4) < 1/10^4 That turns into: n^4 > (64 * 10^4)/3 Can you please explain the steps between those two? Thanks

281. ## Physical world science

A study measuring the max height reached for various launch velocities and obtained the following data: V at m/s max height 0 0 10 28 20 35 30 42 40 49 50 56 60 63 70 70 1. plot the data on a graph 2. draw a best-fit line or curve through the data points

282. ## algebra

n to the 6th is greater than or equal to 38

283. ## math correct or not

y - 4 7/8 = 3/4 y = 5 5/8

284. ## geography

What does this mean? Thank you Colonialism is a process whereby sovereignty over the colony is claimed by the metropole and the social structure, government, and economics of the colony are changed, by colonists - people from the metropole.

what is correct order smallest to largest 0.6,0.06,0.43,0.9

286. ## Math - Basic Math

Each traveler gives the cab driver a tip using the same nine coins. The total tip is \$8.41. How many dimes did the driver get?

287. ## math

17-7(x-3)+x=86

78=3c+12-c+4 solve

289. ## chemistry

What is the frequency of a photon with a wavelength of 5.60 10-7 m? (The speed of light in a vacuum is 2.998 108 m/s. Planck's constant is 6.626 10-34 J·s.)

290. ## Organic Chemistry Lab

For the "ISOLATION OF CHLOROPHYLL AND CAROTENOID PIGMENTS FROM SPINACH" Lab we have to think about how we can correct the following if they were to occur: a.) When a two-component mixture containing 1-ocetone and 1,4-dimethylbenzene gave only one spot with

291. ## calculus

If a store credit account charges 1.2% interest each month, what is the APR?

292. ## math

what is 1/3 + 1/3 = ?

293. ## Eurpoean History

How did imperial forces entice resistant countries into submission? What role did the promise of democracy play? In your opinion, was this promise kept? Why or why not?

294. ## English

Thank you very much. Could you please check these sentences,too? 1.My hobbies are doing athletics, playing the drums and going to the scouts (??) 2.I like going to pizza restaurants with my friends.I live in a quiet big flat. In my family there are four

295. ## math

what is the orginal cost of 565.00 with a 5.5% discount

296. ## trig

If sinθ>0 and tangθ

297. ## calculas

If f(t) = square root of 7/t^5. Find f'(x) and f'(2)

298. ## college

During the job analysis process, the primary purpoe of haveing workers review and modify data collected about their current positions is to

299. ## Math

lim as b approaches infinity of integral of xe^-x^2 from 0 to b aka lim b->inf int(0,b) x*e^(-x^2) dx

300. ## Math

How do you do this Simultaneous Equation? 3x+4y=14 x+y=3 Please give me the step by step solution. Thanks a lot!

comaring and ordering fraction books never written

302. ## Science

Where are memories stored in your brain?

303. ## english

whats dialogue?

304. ## calculus

Let f(x)=4cos^5x. Find f'(x)

305. ## hca/220

Can someone help me get started with this? If you were to break down the terms, "cervical", "mastoid", and "ethmoid"; how might those word parts look? What would be the definitions for each word part? I am not understanding what break down means?

306. ## physics

a satelitee breaks in half while in circular orbit about the earth

307. ## government

Who can impose the draft and under what circumstances?

308. ## math

t + 1/4 = 5/9 t =???

4c+2=18

310. ## math

5 1/6 - 2 1/2 = 3 1/12

311. ## algebra

if 60% of m equals n, 60% of 6m is equal to what terms of n?

312. ## math

find the unit rate. 5hr s of 6

313. ## ap chem

how do you find mole fraction?

314. ## social studies

what is the definition of values

315. ## social studies

i need to draw a kid verson of a separatist

316. ## math correct or no

2 1/16 = d + 5 7/16 d= 3 1/4?

317. ## math

x - 3/4 + 1/6 = 1 5/12