# Questions Asked onOctober 20, 2013

1. ## math

on a farm, there are some cows and some chickens. if the animals have a total of 40 heads and 112 legs, how many cows are there?

2. ## chemistry

2.4g of a compound of carbon, hydrogen and oxygen gave on combustion, 3.52g of CO2 and 1.44g of H2O. The relative molecular mass of the compound was found to be 60. a)What are the masses of carbon, hydrogen and oxygen in 2.4g of the compound? b)What are

3. ## calc

Determine whether the statement is true or false. d dx |x2 + x| = |2x + 1|

4. ## math

a jar contains 5 blue marbles, 8 red marbles,4 white marbles,and 3 purple marbles. suppose you pick a marble at random not looking. what is the chance of getting a red marble

5. ## physics

As a tennis ball is struck, it departs from the racket horizontally with a speed of 27.1 m/s. The ball hits the court at a horizontal distance of 20.0 m from the racket. How far above the court is the tennis ball when it leaves the racket

6. ## CHEMISTRY

25cm^3 of a solution of NaOH required 28cm^3 of 1.0 mol dm^-3 H2SO4 to neutralise it. a)Write an equation for the reaction. b)How many moles of H2SO4 were needed? c)How many moles of NaOH were thus neutralised? d)How many moles of NaOH are there in 25cm^3

7. ## Math 1

Consider the following system of equations. y = 4x - 4 y - 4x = 3 What can you conclude about the system of equations? A) The system of equations is inconsistent. B) The system of equations is dependent. C) The system of equations is independent. D) none

8. ## AP Macroeconomics

1. As an example of a price index, consider the A.C.D.P.I. (a fictitious price index). The associated basket of goods is: Good Quantity Price Coffee 3 lb \$8/lb Bread 3 loaves \$1/loaf Tea 1 lb \$15/lb Aspirin 1 200-tablet bottle \$2/bottle Cola 1 case \$6/case

9. ## Science

Trini adds 10g of baking soda to 100g of vinegar. The mixture begins to bubble. When the bubbling stops, trini finds the mass of the resulting mixture. She determines its mass is 105g. Why has the mass changed? A. A gas has formed and left the mixture B.

10. ## english

Which of the following is not true of parenthetical elements? A. The information they supply is necessary for the sentence to make sense. B. The information they supply can modify the subject or the verb. C. They provide additional detail. D. They require

11. ## Physics Homework

Consider problem U concerning the geosynchronous satellite of mass 50 kg. It orbits at a radius of 42,300 km with a speed of 3076 m/s. a) How much energy is needed to lift the satellite from the earth's surface (Re=6,370 km) up to that radius? b) How much

12. ## Physics Homework

Consider problem U concerning the geosynchronous satellite of mass 50 kg. It orbits at a radius of 42,300 km with a speed of 3076 m/s. a) How much energy is needed to lift the satellite from the earth's surface (Re=6,370 km) up to that radius? b) How much

13. ## math

a group of people pays \$720 for admission tickets to an amusement park the price of an adult ticket is \$15, and a child ticket is \$8. there are 25 more adults than children. how many children are in the group?

14. ## Math

Ann has \$198 more than her sister. After her mom gives Ann \$20 and her sister \$60, Ann has twice as much money as her sister. How much money did Ann have at first?

15. ## english

4. Which of the following sentences contains a comma splice? A.The kitten climbed the drapes, it couldn't figure out how to get down. B.The cruise ship docked on Oahu, then again on Maui. C.We need help with organization, structure, and spelling. D.Our

16. ## Geography

I have to write a three paragraph essay on the causes of terrorism. One paragraph for each cause. All I am helping is finding 3 good causes and a little information about how they cause terrorism.

17. ## Physics

A perforated bead of mass 37g moves on a frictionless horizontal circular track of radius R=0.65m. The track runs through the bead. When the bead is at rest in the horizontal position, it is tied to a spring at the centre of the track. The unstretched

18. ## phyics

A ball is thrown straight upward. At 5.00 m above its launch point, the ball’s speed is one-half its launch speed. What maximum height above its launch point does the ball attain?

19. ## Psychology/ Ms Sue

Please check my answers 1. During puberty, boys testosterone production increases up to 5 times the level in childhood? True 2. Babies of teenagers have a higher risk of birth complications? True 3. Most STIs are fatal if not treated properly? False 4.

20. ## Algebra

graph the line with slope -2/3 passing through (-5, -5)

21. ## Organic Chemistry

So we did a preparation of t-pentyl Chloride experiment in class the other day using t-pentyl alcohol, HCL, Aqueous sodium Bicarbonate, and calcium chloride as the drying agent. Little confused on a few of these questions Aqueous sodium bicarbonate was

22. ## Chemistry

Why is the copper/ sulfur mass ratio different from the mole ratio

23. ## Statistics

A sociologist is interested in the relations between x=number of job changes and y=annual salary (in thousands of dollars) for people living in the Nashville area. A random sample of 10 people employed in Nashville provided the following information:

24. ## Algebra

Each day, a lion in South Africa spends 1/4 of the day watching gnus and 1/4 hours chasing gnus. Then the lion takes 4 times as much time consuming the gnus as chasing the gnus. What is the number of minutes that a lion spends a day watching, chasing and

so my intervention is how i'm going to reduce air pollution like convincing people to walk and ride bikes etc. and then how people are also trying to help reduce pollution? Ecology Intervention Project - Reina B., Saturday, October 19, 2013 at 10:13pm the

26. ## Algebra

A poll was taken of 100 students at a commuter campus to find out how they got to campus. The results were as follows: 31 said they drove alone, 39 rode in carpool, 35 rode public transportation, 10 used both carpool and public transportation, 7 used both

27. ## Water Treatment

a) Which five quality parameters of the raw water may not meet drinking water standards? Bacterial colony count (less than 100 cfu/ml) Ammonium (less than 0.2 mg/l) Nitrite (less than 0.1 mg/l) Nitrate (less than 50 mg/l) Iron (less than 200 µg/l)

28. ## math

a tank and a pail contain a total of 5,136 milliliters of water. jacob pours 314 milliliters of waster from the pail into the tank. the amount of water in the tank is now 7 times what is left in the pail. how much water was in the pail at first?

29. ## chem thermo

consider a system consisting of 2.0mol co2(g) initially at 25c and 10atm and confined to a cylinder of cross section 10.0cm2. it is allowed to expand adiabatically against an external pressure of 1.0atm until the piston has moved outwards through a 20cm.

30. ## physic

Bungee Jumping. A bungee jumper jumps from a tall bridge attached to a light elastic cord (bungee cord) of unstretched length L. The cord first straightens and then extends as the jumper falls. This prevents her from hitting the water! Suppose that the

31. ## Chemistry

explain why glucose 1,6 bisphosphate would not be able to go through the aldolase reaction.

32. ## Science207

Describe at least two alternatives to oil that are currently available and discuss the barriers that keep these alternatives from replacing oil as our primary means of energy?

33. ## Science

Scientific investigations involve many steps and processes. Which characteristics define a laboratory experiment? A. hypothesis, models, and calculations B. test variables, data, and uncontrolled conditions C. data, conclusions, and unregulated environment

34. ## math 5

Identify the solution(s) of the system of equations, if any. 3x+2y=4 5x-4y=3 A) (1, 0.5) B) (0.5,1) C) (5, 5.5) D) 5/11, -2/11)

35. ## chemistry

2.0 grams of Anhydrous sodium are mixed with 2.0 grams of calcium chloride dihydrate and 2.0 grams of calcium sulfate dihydrate are collected what is the percent yield. DO not round a number if used in a subsequent calculation

36. ## math 8

Identify the solution(s) of the system of equations, if any. 5x + 2y = 2 4x - 2y = 8 A) (9/10, -5/4 ) B) (–6, 16) C) (10/9, -16/9 ) D) (10, –24)

37. ## Chemisrty

Answer the questions below for an element that has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s1. A. What is the symbol for this element? B. What is the atomic number of this element? C. How many unpaired electrons does an atom of this elelemt have?

38. ## Math

Lebron James scored 34 points on a combination of 21 foul shots (1 point) and two pointers. How many shots of each type did he make.

39. ## math

2x+6/3=3x-1/2 i got 5/9, is it right?

40. ## Chemistry

When CuCl2 and NH4OH are combined what is the product formed?

41. ## Algebra

a line passes through the point (-7,-4) and has a slope of 3 write an equation for this line

42. ## Chemistry

When CuCl2 and NH4OH are combined what is the product formed?

43. ## Science

Which of the following is an example of how economics can affect science? A. Limited funding may lead scientists to research one topic instead of another. B. Legislators may create new laws about the use of natural resources based on the recommendations of

44. ## Chemistry

When CuCl2 and NH4OH are combined what is the product formed?

45. ## College Physics

A 27.7-cm-by-27.7-cm checkerboard has a mass of 103.1 g. There are four 27.7-g checkers located on the checkerboard, as shown in the figure. Relative to the origin located at the bottom left corner of the checkerboard, where is the center of mass of the

46. ## Algebra

We were asked to determine whether the equation defines y as a function of x. Could you explain this problem? y = x^2

47. ## algebra functions

how do i calculate this if f(x)= 3x+1 and g(x)=x+2 find (f+g)(x) and calculate (f+g)(1) a little confused can some one please help me thank you

48. ## Math

Pls check write this number in standard form Nine hundred two trillion six hundred seven 902,000,000,000,607

49. ## physics

008 (part 1 of 5) 10.0 points A wheel makes 72 revolutions in 2 seconds. What is the angular velocity of the wheel? Answer in units of cycles/s

50. ## Math (Algebra 1)

How do I find the volume of a cylinder that has a diameter of 8 and a height of 6?

51. ## Statistics

a. Critical Thinking Critical Thinking Suppose you and a friend each take different random samples of data pairs (x,y) from the sample population. Assume the samples are the same size. Based on your samples, you compute r= 0.83. Based on her sample, your

52. ## Math

Pls check - Solve 9^2-7 (16÷2^3) 9^2-7 (16÷8) 81-7 (2) 81-14 67

53. ## Math

Pls check - Solve 9^2-7 (16÷2^3) 9^2-7 (16÷8) 81-7 (2) 81-14 67

54. ## chemistry

how many grams of oxygen is needed to burn 500 grams of pentane?

55. ## Phyics

A hot-air balloon is rising upward with a constant speed of 4.00 m/s. When the balloon is 4.77 m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much time elapses before the compass hits the ground?

56. ## Math check

what is the measure of an angle that is supplementary to the following angle. An Acute angle of 57º 57º+90º= Answer 147º

57. ## Math

There are 22 gloves in a drawer. 5 brown pair, 4 green pair, and 2 blue pair. If you had the reach into the drawer and it was dark, how many must you choose to ensure that you have a matching pair?

58. ## math

determine ratio for 4 feet to 32 inches & 10 days to 40 hours. for the 1st I got 48/32=3/2 but i'm not to sure about the other one, it would be less than 2 days?

59. ## Physics

Two flat surfaces are exposed to a uniform, horizontal magnetic field of magnitude 0.50 T. When viewed edge-on, the first surface is tilted at an angle of 14° from the horizontal, and a net magnetic flux of 8.70x10^-3 Wb passes through it. The same net

60. ## PHYSICS URGENT HELP

A bead of mass m slides without friction on a vertical hoop of radius R . The bead moves under the combined action of gravity and a spring, with spring constant k , attached to the bottom of the hoop. Assume that the equilibrium (relaxed) length of the

61. ## math 9

Identify the solution(s) of the system of equations, if any. 3x-2y=6 5x=5-25y A) (28/13, 3/13) B) (-3/17, 32/17) C) (32/17, -3/17) D) (32/9, 7/3) I think the answer is D but i did my check and still comes out incorrect

62. ## Economics

What does, "What are two ways you might use to increase profits once your stained glass window factory is established? Please include what problems you can anticipate from each decision." mean?

64. ## Chemistry

Even if you can help answer one that would be a great help! 1. How many liters of NO(g) are produced when 0.85L of 2.00M HNO3 solution is added to 216g according to the equation. Which reactant is the limiting reactant? 3 Ag + 4 HNO3 -> 3 AgNO3 + NO + 2

65. ## Chemistry

For the diprotic weak acid H2A, Ka1 = 2.2 × 10-5 M and Ka2 = 7.8 × 10-7 M. What is the pH of a 0.0650 M solution of H2A? What are the equilibrium concentrations of H2A and A2– in this solution? Thank you for the help!!

66. ## Chemistry

50.0mL of 1.04moles HA is added to 50.0mL if 0.90moles NH4OH.With a 1:1 stoichiometric ratio. What is the limiting reactant in moles of this reaction.

67. ## Chemistry

For the diprotic weak acid H2A, Ka1 = 2.2 × 10-5 M and Ka2 = 7.8 × 10-7 M. What is the pH of a 0.0650 M solution of H2A? What are the equilibrium concentrations of H2A and A2– in this solution?

68. ## PHYSICS

An air-filled capacitor consists of two parallel plates, each with an area of 7.60 cm2, separated by a distance of 1.70 mm. (a) If a 16.0 V potential difference is applied to these plates, calculate the electric field between the plates. kV/m (b) What is

69. ## Chemistry

For the diprotic weak acid H2A, Ka1 = 2.2 × 10-5 M and Ka2 = 7.8 × 10-7 M. What is the pH of a 0.0650 M solution of H2A? What are the equilibrium concentrations of H2A and A2– in this solution?

70. ## chemistry

2.4g of a compound of carbon, hydrogen and oxygen gave on combustion, 3.52g of CO2 and 1.44g of H2O. The relative molecular mass of the compound was found to be 60. a)What are the masses of carbon, hydrogen and oxygen in 2.4g of the compound? b)What are

71. ## Chemistry

For the diprotic weak acid H2A, Ka1 = 2.2 × 10-5 M and Ka2 = 7.8 × 10-7 M. What is the pH of a 0.0650 M solution of H2A? What are the equilibrium concentrations of H2A and A2– in this solution?

72. ## Chemistry

For the diprotic weak acid H2A, Ka1 = 2.2 × 10-5 M and Ka2 = 7.8 × 10-7 M. What is the pH of a 0.0650 M solution of H2A? What are the equilibrium concentrations of H2A and A2– in this solution? Thank you for the help!!

73. ## Chemistry

For the diprotic weak acid H2A, Ka1 = 2.2 × 10-5 M and Ka2 = 7.8 × 10-7 M. What is the pH of a 0.0650 M solution of H2A? What are the equilibrium concentrations of H2A and A2– in this solution? Thank you for the help!!

74. ## Statistics

The coding department of a large physician clinic is interested in purchasing a software program that will edit claims before they are sent out to billing. The license fee for the software costs \$34,000 per year. The software is expected to reduce the

75. ## Chem

The fizz produced when an alka-seltzer tablet is dissolved in water is due to the reaction between sodium bicarbonate and citric acid: 3NaHCO3 + H3C6H5O7 -> 3CO2 + 3H2O + Na3C6H5O7 In an Experiment 1.00 g of sodium bicarbonate and 1.00g of citric acid are

76. ## chemistry

DrBob222 - it says my answer should be a number.

77. ## math

Two sides of a triangle have lengths 15 m and 18 m. The angle between them is decreasing at a rate of 0.08 rad/s. Find the rate at which the area of the triangle is changing when the angle between the sides of fixed length is 120°.

78. ## Statistics

Dear Sue, I need your help concerning the below questions. Thank you. The coding department of a large physician clinic is interested in purchasing a software program that will edit claims before they are sent out to billing. The license fee for the

79. ## Citizens

What are the rights and responsibilities of citizens? I've already got down 3 rights.

80. ## Math

What does m equal? M*10-m*13=138

81. ## Geography Report (Ms. Sue)

This is the human-environment interaction paragraph. "There are many examples of human-environment interaction in the city of Chicago, such as its architecture, dams, bridges, and its highways. However, what it is believed to the most astonishing display

82. ## Algebra

a line passes through the point (4,1) and has a slope -4 write an equation for this line

83. ## Economics.

What does, "What are two strategies might you employ in order to create and maintain a high demand for stained glass windows. Be sure to consider what would work best for your targeted customer base." mean? NOTE: My targeted customers are: In their middle

84. ## physics(elena)

A bead of mass m slides without friction on a vertical hoop of radius R . The bead moves under the combined action of gravity and a spring, with spring constant k , attached to the bottom of the hoop. Assume that the equilibrium (relaxed) length of the

85. ## algebra functions

how do i calculate this if f(x)= 3x+1 and g(x)=x+2 find (fg)(x)and calculate (fg)(2) is this multiplication and if so what do i do first any help would be appreciated

86. ## physics

Maria is standing 4.5 meters from the tennis net. She hits the ball horizontally with a velocity of 18.0 m/s from a height of 1.20 meters. Will the ball clear the net, which has a height of 1.0 meters? This is a question from my hw. I was wondering if

87. ## Organic Chemistry lab

So we did a preparation of t-pentyl Chloride experiment in class the other day using t-pentyl alcohol, HCL, Aqueous sodium Bicarbonate, and calcium chloride as the drying agent. Little confused on a few of these questions Why is calcium chloride used as

88. ## Science

Water freezes at 0 Celisus. If a temperature drop is causing a glass of water to freeze, how would a thermometer in the water most likely change as the water freezes? A. The temperature would keep rising steadily. B. The temperature would keep falling

89. ## MATH

What does 5.0454e+14 mean?????

90. ## Biology

Which of the following cells check for during the G2 check point? a. Growth hormone c. DNA integrity b. Nutritional status d. Cell size In mitosis, if a cell has 4 chromosomes in prophase, how many chromosomes will this cell have in metaphase? a. 64 b. 32

91. ## Ecology Intervention Project

ms. sue can you answer my question

92. ## sciencee!

What natural zone are each of these cities or areas in? Los Angeles, Palm Springs, Santa Monica Mountains, Catalina, San Francisco, Yosemite --choices are-sierra transitional zone, humid transitional zone,upper sonoran, lower snoran, redwood belt,

93. ## Chemistry

The element boron has three naturally occuring isotopes. One has the atomic mass 10.0129(54.4%), another 11.0093(12.75%). What is the atomic mass of the third isotope if the average atomic mass of boron is 10.811?

94. ## Physics pls anyone can help me? its urgent

A charged rod of length 21cm and total charge -7.5muC is bent into a three-quarter circle symetric about the x-axis as shown below What is the magnitude of the Electric Field at the center of the three-quarter circle in N/C ?:Which directions listed below

95. ## English

What object would you write this poem on and why? The Secrets We Hide © Tiffany Franklin we struggle to have meaning in this world which we all know we try but yet we wonder where we all should go hidden in the questions which we can not find the answers

96. ## math

Two sides of a triangle have lengths 8 m and 24 m. The angle between them is increasing at a rate of 0.05 rad/s. Find the rate at which the area of the triangle is changing when the angle between the sides of fixed length is 135°. Round your answer to two

97. ## math

find 15% of 60, 20 is what percent of 5. how do you do this?

98. ## Physics

A skier skis from rest from a vertical height h1 = 19.1 m over two successively lower hills of vertical heights h2 = 15 m and h3 = 5.2 m. (Fig. 7-30). The summit of the third hill fits a circle of radius h3 centered at height 0 m. Friction with the snow

99. ## Chemistry

Hi, I'm doing a chem lab of the Percent Composition of Potassium Chlorate-A Gas Law Experiment and we need to calculate the percent of KClO3 in the sample volumetrically and gravimetrically. I need help calculating the Volumetric percent of KClO3 in sample

100. ## Physics

I have a hw problem that I know involves calculus, but I'm stumped. The number density of photons left over from the Big Bang has an energy dependence of the form n(E)=(E^2)/e^(E/T)−1, where E is the energy of the photon and T is the temperature of this

101. ## Algebra 1 HELP

-5(1-5x)+5(-8x-2)=-4x-8x

102. ## physics

A car has a maximum acceleration of 4.6m/s2 . What will the maximum acceleration be if the car is towing another car of the same mass?

1. If a student pours a solution of salt water on an elodea leaf, what is it an example of? 2.A child pours salt crystals on the body of a slug he finds in the backyard. Options are: high concentration, low concentration, osmosis, diffusion, hypertonic

104. ## Math (College Pre-Cal)

Find a formula for(f o g)(x)assuming that f(x)= e^(4-7x)and g(x)= ln(x). Give your answer in the simplest form.

105. ## Science/Physics

The cheetah can reach a top speed of 114 km/h (71 mi/h). While chasing its prey in a short sprint, a cheetah starts from rest and runs 46 m in a straight line, reaching a final speed of 73 km/h.

106. ## Algebra 2

I need help in understanding how to multiply the following matrix: 1/4 [ 4 0 -3 1] [12 16 6 -4] [0 -2 5 8]

107. ## Physics

A 6 kg rifle is used to fire a 9 g bullet, which travels with a speed of 700 m/s. (a) What is the speed of recoil of the rifle? ______m/s (b) How much energy does it transmit to the shoulder of the person using the rifle as it stops? ______J I have solved

108. ## Math check

If the radius of a circle is 5 cm what is the area? Formula A=pi r^2 A=3.14×5×5 A=78.50

109. ## Statistics

Suppose you and a friend each take different random samples of data pairs (x,y) from the same population. Assume the samples are the same size. Based on your samples, you compute r = 0.83. Based on her sample your friend computes 0.79. Is your friend’s

110. ## Math

A farmer has 12000m roll of fencing. He wants to make 2 paddocks by splitting a rectangle enclosure in half. What are the dimensions of the enclosure with the largest area that he can make with the fencing he has? I got 6,000,000 m^2, is it right? PLZ help

111. ## Math

A farmer has 12000m roll of fencing. He wants to make 2 paddocks by splitting a rectangle enclosure in half. What are the dimensions of the enclosure with the largest area that he can make with the fencing he has? I got 6,000,000 m^2, is it right? PLZ help

112. ## ela

How does using conflict create suspense?

113. ## Math

A farmer has 12000m roll of fencing. He wants to make 2 paddocks by splitting a rectangle enclosure in half. What are the dimensions of the enclosure with the largest area that he can make with the fencing he has? I got 6,000,000 m^2, is it right? PLZ help

114. ## A Curious Question

What is the format, or layout, of a report?

115. ## Environmental Science

Would you expect to find the humid transitional zones on the coast or inland? Northern or Southern part of California?

116. ## PHYSCIS

a solid of density 5000 kgf weights 0.5 kgf in air . it is completely immersed in water of density 1000 kg m-3.calculate the apparent weight of the solid in water.

117. ## science

Why is a coyote a poor indicator species What natural zone are each of these cities or areas in? Los Angeles, Palm Springs, Santa Monica Mountains, Catalina, San Francisco, Yosemite.

118. ## Computer

How do i write a ratio into excel

119. ## statistics

A university has 1000 computers available for students to use. Each computer has a 250 gigabyte hard drive. The university wants to estimate the space occupied on the hard drives. A random sample of 100 computers showed a mean of 115 gigabytes used with a

120. ## physics(HELP IT'S URGENT)

A bead of mass m slides without friction on a vertical hoop of radius R . The bead moves under the combined action of gravity and a spring, with spring constant k , attached to the bottom of the hoop. Assume that the equilibrium (relaxed) length of the

122. ## math

the trajectory, of the projectile satisfies the following equation,wher g is the acceleration due to gravity, y=mx-g/2v^2(1+m^2)x^2 where y as the vertical rise, and x asthe horizontal component of the displacement. A football is kicked with initial

Solve the inequality 12x^3 + 8x^2

124. ## home economics

what are welfare payments

125. ## physics

A constant force of 58.3 N, directed at 31.7 degrees form horizontal, pulls a mass of 11.9 kg horizontally a distance of 2.77 m. Calculate the work done by the force.

126. ## chemistry

if air contains78% of nitrogen by volume what is the solubility nitrogen in water at 25 degree celcius?

127. ## Science

A magnet was placed near a pile that contained both iron and sulfur. The magnet was moved gradually closer to the pile. As it neared the pile, the magnet started attracting small pieces of iron from the pile. What best describes? A. Solution or iron and

128. ## Turabian Citation

For citing using the Turabian or Chicago format, do you have to put a subscript and a footnote at the end of every sentence? If not, if you have two sentences that belong to the same source, would you put the footnote at the end of the second sentence like

129. ## math

Verify the given linear approximation at a = 0. Then determine the values of x for which the linear approximation is accurate to within 0.1. (Enter your answer using interval notation. Round your answers to three decimal places.)

130. ## Projectile motion

A cannon is fired from a cliff top 15m high and at 30 degrees. It takes 3 seconds for canon to reach the earth, what is the initial velocity of the cannon

131. ## Algebra (Word Problem)

Jack and Jill each tipped their waiter 50 dollars. Jack tipped 4% of his bill while Jill tipped 10% of her bill. What is the total bill of the two?

132. ## math

125% of what number is 50? do you do 1.25 x 50?

133. ## science

Now assume that we are working in units such that ℏ=1. If the state of the system at time t=0 is ψ(0)=|0⟩, what is the state of the system at time t=π2? What about at t=π? t=π2:

134. ## Math check

Jack the parrot has learned to say, jack wants a cracker, if he repeats the phrase every 5 minutes for 3 hours and is given a cracker each time he asked for one how many crackers will he eat? 12 crackers ea hour 12 × 3= 36

135. ## math

naomi macy and sebastian have 234 stamps in all. naomi gives 16 stamps to macy and 24 stamps to sebastian. naomi then has 3 times as many stamps as macy, and macy has twice as many stamps as sebastian. how many stamps does naomi have at first?

136. ## Statistics

What is the percentage of immigrants living here in the U.S. legally? Of these people, how many are naturalized? I've tried looking this up, but either the article was made without the full 2012 census or it talked about illegal immigrants.

137. ## Physics

Question:In the field of telecommunications, sound waves are sent to faraway places with the help of a kind of electromagnetic wave. Explain, by using a block diagram, how sound waves can be transmitted over long distances.

138. ## Ecology Intervention Project

"two other projects that are either similar to your intervention or address a similar issue. remember to relate these projects to yours" i'm doing a project on air pollution and how it affects the environment but i don't know projects similar to my

139. ## Biology

single celled prokaryotes like the bacteria and archaea are the dominant and most diversified groups of living forms today. does this support their ancient origins? Explain

140. ## chemistry

If 4.02 grams of a hydrate of magnesium sulfate loses 2.06 grams of water when heated, what is the formula for the hydrate

141. ## Physics

A baseball of mass 0.13 kg, moving horizontally with a momentum of 4 kg¡Pm/s, is struck head-on by a baseball bat with an impulse of 10 N¡Ps. What is the speed of the baseball after it is struck? _______m/s

142. ## physics

A 5.7 kg bag of groceries is in equilibrium on an incline of angle θ = 16°. Find the magnitude of the normal force on the bag.

143. ## Physics

A 0.115 kg baseball is thrown upward with an initial speed of 17.0 m/s.

144. ## Civics

How is the declaration related to John Locke's idea of the social contract?

145. ## math

together, tom and max have 72 football cards.Tom has 2 more than 4 times as many cards as Max has. How many football cards does tom have ?

146. ## physics

A bead of mass m slides without friction on a vertical hoop of radius R . The bead moves under the combined action of gravity and a spring, with spring constant k , attached to the bottom of the hoop. Assume that the equilibrium (relaxed) length of the

147. ## Math

Can I simplify (12960 - 0.1x^2) / 0.2x^2 any further? How?

149. ## Physics

Vanessa can swim 3.0 m/s in still water. While trying to swim directly across a river from west to east, Vanessa is pulled by a current flowing southward at 2.0 m/s. A) What is the magnitude of Vanessa’s resultant velocity? B) If Vanessa wants to end up

150. ## physics

n object is dropped from rest. What is the acceleration after 6 s? The acceleration of gravity is 9.8 m/s 2 . Answer in units of m/

151. ## math

Stella brought 3/8 of a pound of grapes and ate 1/3 of the grapes.How muchdid she eat?

152. ## Physics

Vanessa can swim 3.0 m/s in still water. While trying to swim directly across a river from west to east, Vanessa is pulled by a current flowing southward at 2.0 m/s. A) What is the magnitude of Vanessa’s resultant velocity? B) If Vanessa wants to end up

153. ## science

Describe the motions that causes one day on earth

154. ## science

Explain what causes the tides to change

155. ## science

1 what would cause a plant to have a shorter day. 2 what would cause a plant to have a longer day

156. ## physics

A bead of mass m slides without friction on a vertical hoop of radius R . The bead moves under the combined action of gravity and a spring, with spring constant k , attached to the bottom of the hoop. Assume that the equilibrium (relaxed) length of the

158. ## Chemistry

Is my answer in 3 sig fig or 4 sig fig?? A solution is prepared by dissolving 12.80 g of magnesium chlorite in enough water to make 200.0 mL of stock solution. A 25.0 mL aliquot (portion) of this stock solution is then removed and added to 250.0 mL of

159. ## algebra

the printed matter on a 10 by 16 centimeter page of a book must cover 40 square centimeters. if all margins are to be the same width, how wide should they be?

160. ## Math- Algebra

A motorist was to travel from town A to town B, a distance of 80 miles. He traveled the first 24 minutes at a certain rate; traffic then increased and for the next 6 minutes he averaged 10 miles per hour less than his original speed; then traffic eased up

161. ## Math check

michael has 79 dvds. He can store 15 dvds in a wooden crate. how many crates will he need 79÷15 = 5 but I get a remainder 4. Is it right to say he'll need 5 crates

162. ## science@@@@

how to make a model for scince fair for purification of smoke coming out of chimneys? And how this purified smoke can be used for useful purposes? Does smoke contain moisture?

163. ## Geography Report (Ms. Sue)

I know you told me not to post a rough draft, but I have only written three paragraphs and I am struggling to write the others. Even so, could you evaluate the paragraphs I have already written and tell me of what could be improved or improvised. Thank

164. ## Pre-Calculus

Find the value of the parameter: x = 3t y = t^2 + 5 t = 2

165. ## algebra

Beatriz is creating graphs for her city’s Parks Department. Beatriz is trying to persuade the Parks Department to put in more gazebos for shade. For a local park, Beatriz wants to demonstrate the attendance as it changes every week. She also wants to

166. ## Algebra

4x-3y=-6 finding the x and y intercept line based on a equation in standard form

167. ## physics

You apply a potential difference of 5.00 V between the ends of a wire that is 2.65 m in length and 0.654 mm in radius. The resulting current through the wire is 17.6 A. What is the resistivity of the wire?

168. ## Math

what is the scale factor of ~ 1 inch= 3 feet please explain!

169. ## Social studies

What advanced technology is in the us What record keeping in the us

170. ## Algebra

how do you find -4/5 on a graph?

171. ## Biology

I am having a really hard time understanding respiration and photosynthesis. Is there a simple explanation for both processes?

172. ## AP Macroeconomics

Which of these is a component of the interest rate on a 10-year inflation indexed US government bond? A.)Risk that the borrower will default B.)Positive rate of time preference C.)Expected inflation rate D.)general uncertainty about the future

173. ## social studies

which is least likely to be found at the poverty point site ? a) clay cooking balls b) spears c) pendants d) hand plows

174. ## arithmetic

5. Assume that if students buy more than \$250 of art supplies in one visit, they may put the charge on a student account with terms of 2/10 EOM. If a student makes the purchase on September 16, on what day does the 2% discount expire? If the purchase is

175. ## cpt

cpt code for suicide

176. ## Calculus

Determine whether the integral is divergent or convergent. If it is convergent, evaluate it. If it diverges to infinity, state your answer as INF. If it diverges to negative infinity, state your answer as MINF. If it diverges without being infinity or

177. ## french

how do you unscramble rumoe-ised

178. ## college physics

Why do the passengers in high- altitude jet planes feel the sensation of weight while passengers in the International Space Station do not?

179. ## College Physics

A fire hose 4.79 cm in diameter is capable of spraying water at a velocity of 17.1 m/s. For a continuous horizontal flow of water, what horizontal force should a fireman exert on the hose to keep it stationary?

180. ## physics

A golfer hits a shot to a green that is elevated 3 m above the point where the ball is struck. The ball leaves the club at a speed of 14.2 m/s at an angle of 43.2° above the horizontal. It rises to its maximum height and then falls down to the green.

Would you expect to find the humid transitional zones on the coast or inland? Northern or Southern part of California?

182. ## Science

Astrologers relate the location of stars and planets to events in human lives. Many years ago, people classified astrology as a science. Why do modern scientists consider astrology to be a pseudoscience A. Astrology does not involve the use of telescopes.

183. ## Math

peyton has1218 fancy hat in her closet. if payton gives grace 1/3 of those fancy hats how many fancy hats will grace have?

184. ## Math

How much low fat milk(1%) and whole milk(4%) should be mixed to make 5 gallons of reduced fat milk (2%)?

185. ## Chemisty

Answer the questions below for an element that has the electron configuration 1s2 2s2 2p6 3s2 3p3. A. What is the symbol for this element? B. What is the atomic number of this element? C. How many unpaired electrons does an atom of this elelemt have? D.

186. ## math

Identify the solution(s) of the system of equations, if any. -4x - 4y = 4 4y = -4x - 4 A) no solution B) (0, -1) C) (-1, 0) D) infinitely many solutions

187. ## math

Find the sum of the squares of the deviations from the mean of a series of ACT scores: 24,17,27,25,22

188. ## algegra

an editor gets a 2110 raise each year. after 8 years she makes 51,700 per year. write an equation that gives her income as a function of how many years she has worked

189. ## chemistry

A B C D E F G H 14Si A B C D E F G H 13Al A B C D E F G H 12Mg A B C D E F G H 4Be A B C D E F G H

190. ## math

2(x+3)=-4(x+1) my answer is 5/3 am i right?

191. ## Math 3

Identify the solution(s) of the system of equations, if any. x + 2y = 6 3x - 6y = 0 A) (3, 2/3) B) (3,3/2 ) C) (2/3, 3) D) (3/2, 3)

192. ## math 4

Identify the solution(s) of the system of equations, if any. 6x + 2y = 0 y = 1 - 5x A) (–1.5, –0.5) B) (–1.5, 0.5) C) (–0.5, –1.5) D) (0.5, –1.5)

193. ## Chemistry

Choose from the list the correct electron configurations for the following ions. A B C D E F G H I J K+ A B C D E F G H I J In+ A B C D E F G H I J Li+ A B C D E F G H I J Na+ A. 1s22s22p63s23p6 B. 1s22s22p63s23p64s23d104p64d105s25p1 C.

194. ## Math 6

Identify the solution(s) of the system of equations, if any. -3x-4y=2 8y=-6x-4 A) infinitely many solutions B) (-16/9, 5/6) C) (-2/3, 0) D) no solution

195. ## Physics

A constant force of 35.9 N, directed at 28.7o from horizontal, pulls a mass of 14.7 kg horizontally a distance of 3.41 m. Calculate the work done by the force.

196. ## Physics

A constant force of 35.9 N, directed at 28.7o from horizontal, pulls a mass of 14.7 kg horizontally a distance of 3.41 m. Calculate the work done by the force.