# Questions Asked onJanuary 19, 2012

1. ## Math

A local Dunkin donuts makes blueberry muffins that cost \$.69 each to make. Past experience shows that 15% of the muffins will spoil and have to be discarded. Assuming this donut shop wants a 30% markup based on cost and produces 200 muffins, each muffin

2. ## BIOLOGY

which of the follwing is best definition of science? A.a body of knwolege gathered throgh experiments. B.a process of accidental discorery. C. a search for answers to questions about the natural world. D. a method of asking testable questions based on

3. ## physics

an aeroplane is travelling horizontally at a speed of 80ms and drops a crate of emergency supplies.To avoid damage,the max vertical speed of the crate on landing is 20ms. a)calc d max height of the aeroplane when the crate is dropped b)calc d time taken

4. ## BIOLOGY

Which of the following is the best definition of science.

5. ## Math

A wooden duck with a regular selling price of \$125.99 is marked down to \$79.99. The percent of markdown is: Answer: 36.51% What is the formula? How to solve this?

6. ## Math

Bill furrier marks up mink coats 3000.00, which represents a 50% markup on cost. what is the cost of the coats?

7. ## Math

Amy, a senior, bought a car last year so that she could drive to school on the days when she needed to stay after class for practice. She spent \$155 last year for gas. This year she spent \$195. Disregarding other factors, what is the inflation rate?

8. ## Chemisty

Wire is often sold in pounds spools according to the wire guage number. That number refers to the diameter of the wire. How many meters are in 3-Ib spool of 12 gauge aluminum wire? A 12-guage wire has a diameter of 0.0808 in. Aluminum has a density of 2.70

9. ## algebra

Pump A can fill a swimming pool in 6 hours and pump B can fill the same pool in 4 hours. The two pumps began working together to fill an empty pool, but after 40 minutes pump B broke down, and pump A had to complete the job alone. The pool was scheduled to

10. ## Math

If the diameter of a monster truck tire is 3.5 m and it makes one rotation every 5 seconds, how far does the tire roll in 1 minute? Diameter 3.5 radius: 3.5/2 = 1.75 12(2pi x 1.75) =131.9 m the book states that its 263.89 m? What did I do wrong?

11. ## Math

What value for function y=3cos(t-pi) + 2 gives an instantaneous rate of change of 0? a) 0 b) pi/2 c) pi/3 d) pi/4

12. ## Math

One side of a parallelogram has endpoints (3, 3) and (1, 7). What are the endpoints for the side opposite? (8, 1) and (6, 7) (6, 1) and (2, 3) (6, 1) and (8, 5) (8, 1) and (6, 5)

13. ## Math

A partial cylinder lies on its side. The bases are a 90 degree sector of a circle. What is the exact volume of the partial cylinder. r=8,length 10 160 pi inch cubed 20 pi inch cubed 80 pi inch cubed 40 pi inch cubed

14. ## chemistry

A tank contains a mixture of 3.0 mol of nitrogen 2.0 mol of oxygen and 1 mol of carbon dioxide at 25 degrees and a total pressure of 10 ATM calculate the partial pressure in torr of each gas?

15. ## trig

I don't know to find the derivative of the following trig functions. Please help. f(x)= cotx h(x)= secx i(x)= cscx

16. ## English

When writing a research paper, choose a research subject that is a) not too broad or too narrow. b) very broad. c) only about personal experiences. d) very narrow.

17. ## physics

An aeroplane is travelling horizontally at a speed of 80ms and drops a crate of emergency supplies.To avoid damage,the maximum vertical speed of the crate on landing is 20ms. a)the aeroplane is travelling at the maximum permitted height.Calc the horizontal

18. ## Physics

Sphere W (with an initial charge of zero) is touched to sphere A and then they are separated. Next, sphere W is touched to sphere B (with an initial charge of -26e) and then they are separated. Finally, sphere W is touched to sphere C (with an initial

19. ## chemistry

What mass of aluminum hydroxide will be produced when 0.460 grams of aluminum sulfide react with water? How many grams of hydrogen sulfide are produced, according to the following equaton? Al2S3 + H20 -------> Al(OH)3 + H2S

20. ## science/anatomy

common pathways for food and air are the (1), which connects to the mouth, and (2), which connects to the larynx. Epithelium in this region is (3), which provideds good protection from friction. Three bands of skeletal muscle, the (4) propel food into the

21. ## Chemistry

A chemistry student weighs out 0.123 grams of chloroacetic acid (HCH2ClCO2) into a 250. milliliter volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1200 moles/liter NaOH solution. Calculate the volume of

22. ## Geometry

The quadrilateral with these following vertices is a parallelogram. (-4, -3), (2, -3), (4, -6), (-4, -6) True False

23. ## chemistry(balance equation)

hi!i am a f4 student in hk.i have know the basic concept of balance equation.but some too complex equation i cant balance.is there any general short cut for balancing any simple or complex chemical equation?

24. ## physics

what pressure would you expect if the gas in the flask were heated to 150 degrees celsius?

25. ## Math

If your annual income from a part-time job is \$2,698, and the inflation rate is 4 percent, what is the purchasing power of your income?

26. ## english l

which of the following is an example of foreshadowing in "The monkey's paw"? a) herbert says he doesn't see the wished-for money and never will. b)herbert is killed in an accident. c)herbert returns from the dead. d)herbert vanishes when mr.white makes the

27. ## Physics

Sphere W (with an initial charge of zero) is touched to sphere A and then they are separated. Next, sphere W is touched to sphere B (with an initial charge of -26e) and then they are separated. Finally, sphere W is touched to sphere C (with an initial

28. ## Help!!!

An electric field of intensity 4.27 kN/C is applied along the x-axis. Calculate the electric flux through a rectangular plane 0.350 m wide and 0.700 m long if the following conditions are true. (a) The plane is parallel to the yz-plane. (b) The plane is

29. ## ELA

What change should be made in this sentence? I cannot hardly believe that this is our capital. F. change cannot to can G. change believe to beleive H. change capital to capitol J. make no change F? What is the Best way to rewrite this sentence? Tea in an

30. ## math

An electron moving along the x axis has a position given by x = 14te^-5t m, where t is in seconds. How far is the electron from the origin when it momentarily stops?

31. ## ELA

What should be changed in this sentence? Yes, only six rooms is finished A. change Yes, to Yes B. change is to are C. change finished to finish D. make no change B? What should be changed in this sentence? Construction was started eight years ago in 1792,

32. ## counciling

Say you have to write a paper for your councilor. Would you write about something happy. Oh, keep in mind if you were to it has to be 5,050 words long and you'd have a day to write it. Happy or sad?

33. ## Chemistry

A chemistry student weighs out 0.123 grams of chloroacetic acid (HCH2ClCO2) into a 250. milliliter volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1200 moles/liter NaOH solution. Calculate the volume of

34. ## science

Which type of taxonomic system uses what an animal looks like to classify it: a) phenic system b) cladistic system c) genetic system d) observatory system

35. ## math story problem

a cat runs 3 times as fast as a rabbit. If a rabbit ran 2m per second and is 12m from the cat, the rabbit will be caught in ______ seconds?

36. ## chemistry

What mass of H2SO4 would be required to react with 0.59 mol of NaOH?

37. ## Math

On finding a perimeter and area and there is a decimal for the shape but the 2 other numbers on the shape don't. Do I multiply/add with the decimal on all numbers or only on that 1 number? EXAMPLE There is a triangle one side is 1.5 the base is 2 and the

38. ## math

9 squares and the 5 is in the middle, fill in the other squares using 1-9 to make all columns, rows, and diagonals equal.

Here is the assignment: Ten years ago, you started working as a clerk for DMD Medical Supplies. Six months ago, Liz Jakowski, the human resources director, promoted you to office manager. You manage two employees: Jack Snyder and Ruth Disselkoen. Your

40. ## chemistry

If 22.40g of potassium react with silver sulfide what mass of each product will form?

41. ## french book

I have homework in my French book but left it at school. I use the Imaginez: le français sans frontières. There is an online version but it says I needa code. I don't have my book with me so I can't get the code from there. is it a common code that can

42. ## Math

Fred runs a lap every 2 minutes and Mark runs a lap every 2.5 minutes. They start together. How long will it be before they are next to each other again?

43. ## Math

Determine each tangent ratio to four decimal places using a calculator. A) tan 74 degrees B) tan 45 degrees C) tan 60 degrees D) tan 89 degrees How do I figure this out !?

44. ## spanish

This is on demonstrative adjectives and are fill in the blanks. ____ pantolones son bonitos y el precio no es muy alto. Si, las dos cosas son geniales. Tambien me gustan ____ sueteres que estan cerca de ti. ?De que talla es _____ sueter negro, el de solo

45. ## physics

Due to a disease the main artery is enlarged and the area of cross-section bacame 1.6 times the previous value. The speen of the blood in unenlarged artery is 0.4 m/s. what is the excess pressure on the walls of the artery due to enlargement. (density of

46. ## geometry

the sides of a triangle have lengths 4x+1, 2x+1 and 6x-1. if the lengths of the longest side is 6x-1, what values of x make the triangle obtuse?

47. ## 8th grade physical science

What is the kinetic energy of a 1 kilogeram ball is thrown into the air with a velocity of 30m/sec? How much potential energy does the ball have when it reaches the top of its ascent? How high into the air did the nall travel? Please help me help my child

48. ## calculus

find the relative extrema and points of inflection, if possible, of y = xln((x^4)/8) Any help would be awesome...thanks! (i know that the relative extrema come from critical values from y' and points of inflection come from y'')

49. ## Chemistry

0.75 L of hydrogen gas is collected over water at 25 oC and 101.6. What volumme will e dry hydrogen occupy 103.3 kPa and 25 oC? What is the balanced equation and what of numbers do i use ?

50. ## physics

A bike rider accelerates constantly to a velocity of 7.4 m/s during 4.6 s. the bike's displacement is +18 m. What was the initial velocity of the bike?

51. ## physics

A ball rolls up a ramp and then back down again. The ramp is oriented so that the ball is rolling to the right as it rolls up the ramp. Assume that positive v and a vectors point to the right. Which statement is true about the ball's horizontal

52. ## Math

Would someone verify these answers. 1. A person waves his hand back and forth, where their finger tips move past the starting position 4 cm in each direction. If he waves 20 times every 15s, what sine equation models the movement of the hand if the hand

53. ## Physics!!!

A small sphere of mass m = 6.40 g and charge q1 = 30.3 nC is attached to the end of a string and hangs vertically as in the figure. A second charge of equal mass and charge q2 = −58.0 nC is located below the first charge a distance d = 2.00 cm below the

54. ## psy/300

How does sensation and perception affect learning?

55. ## math

using these alphabets a,b,c,d e,f spell these letters a=1,b=2,c=3,d=4,e=5,f=6 2+5+4=11 bed 2+5+1+4=12 bead 6+5+5+4=20 feed what numbers and alphabet = 30

56. ## physics

In December of 1989, a KLM Boeing 747 airplane carrying 231 passengers entered a cloud of ejecta from an Alaskan volcanic eruption. All four engines went out, and the plane fell from 27800 ft to 13700 ft before the engines could be restarted. It then

57. ## Math

Cassie successfully harvested 7/12 of her crop, and Robert successfully harvested 58% of his crop. Who successfully harvested the larger portion of his or her crop?

58. ## algebra

The length of a rectangular playground is 4 meters less than 3 times the width. The perimeter is 64 meters. Write 2 equations that would be used to solve the system.

59. ## Chemistry

For my Chemistry question it's about herbicide's What do they do? what are they intended for? what risk's do they pose in our society? how are they created? if anyone could answer these please thanks you!

60. ## math

the white team lost 2/5 of all its games and won 39 games. how many games did they play? show and explain your work.

61. ## Algrebra-Systems of Equations

The perimeter of a rectangle is 110cm. The length is 1cm more than twice the width. Write 2 equations that would be used to solve the system.

62. ## science

What diseases can ultrasounds detect and how? thank you

63. ## Physics

A hunter wishes to cross a river that is 1.6 km wide and that flows with a speed of 4.8 km/h. The hunter uses a small powerboat that moves at a maximum speed of 9.6 km/h with respect to the water. What is the minimum time necessary for crossing?

64. ## math

mrsdryson is divding her collection of 52 glass bears into equal groups. she has 1 bear left over. how many did mrs.dryson make

65. ## Physics

A spring force constant 210 N/m vibrates with an amplitude of 28.0 cm when .250 kg hangs from it. What is the equation describing this motion as a function of time? Assume that the mass passes through the equilibrium point with positive velocity at t=0. At

66. ## Algrebra-Systems of Equations

A collection of dimes and quarters is worth \$19.85. There are 34 more dime than quarters. Write a system of equations that can be used to find how many of each type of coin there are in the collection.

67. ## math

using these alphabets a,b,c,d e,f spell these letters a=1,b=2,c=3,d=4,e=5,f=6 2+5+4=11 bed 2+5+1+4=12 bead 6+5+5+4=20 feed what numbers and alphabet = 30

68. ## English

4. Why should you summarize? a) Primary sources are hard to understand without summary. b) Because summarizing is more effective than paraphrasing. c) none of these is correct d) So your paper doesn’t turn into a string of quotations.

69. ## Algrebra-Systems of Equations

One weekend, a newsstand sold twice as many Sunday papers as Friday papers. The Sunday paper cost \$0.90 and the Friday paper costs \$0.25. The total receipts were \$84.05. How many Friday and how many Sunday papers we sold? Write equation.

they say write a sentence about something you like about stars. underline the verb make it agrees with the subject of the sentence. and my son write stars are really shiny,and really bright. also i like about stars is that they help with directions. my son

71. ## Algrebra-Systems of Equations

Mary is twice as old as her nephew. The sum of their ages is108. Write system of equations that could be used to find there ages.

72. ## Science

A boy pushes a cabinet with a 85 kg mass a distance of 3.1 km at a constant velocity over a rough surface. The coeffient of friction Uk between the cabinet and floor is 0.22 .Calculate the magnitude of all the forces acting on the cabinet.

73. ## Algrebra-Systems of Equations

One number is 12 less than three times another number. Their sum is 188. Write two equations that would be used to solve the system.

74. ## math

Write an equivalent variable expression. 9(5r 3)

75. ## Algrebra-Systems of Equations

Kasey is thinking of 2 munbers. The sum of the two numbers is -18. Their difference is 38. Write a system of equations that can be used to find the numbers.

76. ## Science

Any help would be apreciated! Which of the following is a way to improve the efficiency of a heat engine? increase Qh reduce Qh reduce Wnet increase Qc A What are the energies associated with atomic motion called? kinetic energy potential energy bond

77. ## math

Write an equivalent variable expression. 9(5r 3)

78. ## chemistry

answers to latenite labs chemistry lab#9 stoichiometry by loss of CO2

79. ## math/calculus

Find f’’(x) if f(x)=(6^x^2+3)

80. ## Math

Vic's Department Store bought a pewter serving set for \$1,250. Vic wants to markup the set at 60% of the selling price. The selling price of the pewter serving set should be: Answer: \$3,125 How to to solve this? Confused?

82. ## Help!

Is there really a 4 inch or bigger binder????? You see I have a 2 inch binder for all of my subjects (facs, math, eng, etc.) and I have another binder for orchestra (skinny), and 1 inch binder for homework (have dividers with pckets). And like I can't take

83. ## Stoichiometery

1. This experiment requires you to do 7 trials with varying amounts of Na©üCO©ý. 2. Take a clean 50 mL beaker from the Glassware shelf and place it on the workbench. This is beaker # 1. 3. Take a balance from the Tools shelf and drop it on the beaker.

84. ## math/calculus

Find f’’(x) if f(x)=(6^x^2+3)

85. ## math/calculus

Find f’’(x) if f(x)=(6^x^2+3)

86. ## math

Loan #1 Year Amount owed 1 \$3796 2 \$3942 3 \$4088 Loan # 2 Year Amount owed 1 \$977.53 2 \$1036.18 3 1098.35 For loan #1 is simple interest. Loan #2 is compound interest How much was each loan originally Determine the future value of each loan after 10 years

87. ## Chemistry

Please help me with the questions at the end of this chemistry lab.Thank you for any help you can provide. 1. This experiment requires you to do 7 trials with varying amounts of Na©üCO©ý. 2. Take a clean 50 mL beaker from the Glassware shelf and place

88. ## social studies

who was the 8th US president

89. ## math

How do you subtract 3/5 from 9 1/5 I am having trouble understanding the work can u help

90. ## Precalc

Write a 3 x 4 pre-image matrix for a kite with the points (2,4) (4,5) (6,4) and (4,1)

91. ## algebra

168 kilometers in 3.25 hours. how long to go 240 km?

92. ## BIOLOGY

what is an hypothesis. a. a prediction b.a collection of data c.a possible explanation tha can be tested d. a controlled experiment. i think is d

93. ## geometry

What is the solution of the proportion? 3y-8 y ---- = --- 12 5

94. ## Precalc

For this matrice, [[0.9cos(-30), 0.9cos(60), 2] [0.9sin(30), 0.9sin(60), 4] [0, 0, 1]] What is the rotation (in degrees) and is it clockwise or counterclockwise? I think it's 30 degrees clockwise...Is that right?

95. ## Math

Would someone like to help me with these questions? Steps appreciated~ 1. If the diameter of a monster truck tire is 3.5 m and it makes one rotation every 5 seconds, how far does the tire roll in 1 minute? -------------------------------------- 2. At t=0 a

96. ## Algebra 2

formula for converting celcius to fahrenheit: F=9/5C+32 a) what is the inverse of the function? b)use the inverse to find the celcius tempertature that corresponds to 25F Please help i have no idea how to solve this :(

97. ## sample company compensable factor

i need jc penny hay plan by hay associates and compensable factors but i cant find any on the net whole day,,my eyes r really red now and tired so if you can help me find a site that have their company's compensable factor matrix~i would be really happy

98. ## Science

An 80 kg person decides to jump off the back end of a 30 kg canoe. His friend measures the speed of the canoe after he jumps to be 0.8 m/s. The canoe was initially at rest. What rule would I use to find the speed of the person who jumped?

99. ## geometr

Given the proportion a/b=8/15, what ratio completes the equivalent proportion a/8= what/what ?

Mr. Brown has a piece of hose 11 ft long. He is going to cut it into 15 equal-length pieces. How long will each piece be?

101. ## logic

Mary is poor. She has not been able to find a job and has two children she needs to feed. Assume Mary is forced to let her children go hungry or steal some food from a local grocery store. Which should she do? Construct an argument that supports Mary's

102. ## Science

A ball has a potential energy of 180 J and a kinetic energy of 0 J. After falling 2m, it has a potential energy of 135J. What is its kinetic energy at this point?

103. ## algebra

The length of a rectangle is 5 inches longer than its width. Its perimeter is 45 inches. Let w equal the width of the rectangle. Write an expression for the length in terms of the width. Use expressions for the length and width to write an equation for the

104. ## Chemistry

I would really appreciate it if someone would please help me out with this lab, Stoichiometry by Loss of CO2, from my 12th grade chemistry class. 1. This experiment requires you to do 7 trials with varying amounts of Na2CO2. 2. Take a clean 50 mL beaker

105. ## chemistry

Assuming the temperature and pressure are held constant, which of the gas samples has the greatest number of gas particles? 45.0 mL O3 35.0 mL N2 15.0 mL of CO2 25.0 mL of SO3

106. ## find a rule

write a sequence for the rule a-4=b. a+(2-1)=b

107. ## chemistry

Assuming the temperature and pressure are held constant, which of the gas samples has the greatest number of gas particles? 45.0 mL O3 35.0 mL N2 15.0 mL of CO2 25.0 mL of SO3

108. ## science

what is taxonomy?

109. ## Science

WHen a wrecking ball hits a wall, it is usually moving at about 10 km/h, which is not very fast. How can this ball knock down a solid wall?

110. ## science

which form of classification groups animals based on their phylogenetic similarities? a) order b) cladistics c) linnaeus d) systematic

111. ## math

Good afternoon!I'm homeschooled so they only give us workbooks and ect. They explain how to do the problems but it confuses me. Here is 1 out of the 5 q's I don't get. A printer is on sale for \$129.99. This is 25% off the regular price. what is the regular

112. ## calc

find f'(x) if f(x)=a^x is in undefined, xe, of e^x?

113. ## calculus

Throughout the 20th century, the yearly consumption of electricity in the US increased exponentially at a continuous rate of 7% per year. Assume this trend continues and that the electrical energy consumed in 1900 was 1.4 million megawatt-hours. Find the

114. ## Social Studies

8.Which point in the Virginia Plan was objected to by supporters of the New Jersey Plan? A. Larger states should have more representatvies in Congress B. Congress requires greater power C. The government needs an executive branch D. The government needs a

115. ## Chemistry

The pressure of a gas is affected by the number of particles and not affected by the kind of gas it is. What does this fact tell us about ideal gases?

116. ## science

one characteristic used to place organisms into kingdoms is..... a) how they move b) where they live c) their ability to make food d) their ability to reproduce

117. ## science

A molecule that contains all the information a cell needs to make protein: a) ATP b) carbohydrate c) lipid d) protein e) philosophic f) nucleic acid

118. ## help !!!!!!!!!!!!!!!!!!!!! piz

Also don't give me a website .In what ways does the Bill of Rights protect citizens from power of government? and thank you

119. ## 8th grade Physical Science

What is the potential energy of a 3 kilogram ball this is on the ground?

120. ## Geom

write a similarity statement and the postulate or theorem you used. What does this mean??

121. ## Quality management/performance improvement

as a health information management coding supervisor, you have been asked to compare the steps of the current coding process with a proposed coding process. what would be the best tool to use for this process? a. Root-cause analysis b. scatter diagram c.

122. ## Chemistry

I would really appreciate it if someone would please help me out with this lab, Stoichiometry by Loss of CO2, from my 12th grade chemistry class. 1. This experiment requires you to do 7 trials with varying amounts of Na2CO2. 2. Take a clean 50 mL beaker

123. ## physics

a swimmer makes 31.5 laps in the pool in 1.5 determine the total distance, total displacement, and average velocity.

124. ## math

write a sequence for the rule a-4=b

125. ## physics

A helicopter 7.60m above the ground and descending at 3.90m/s drops a package from rest (relative to the helicopter). We have chosen the positive positive direction to be upward. The package falls freely. part A- Just as it hits the ground, find the

126. ## Precalc

The figure shows a 10 x 10 square centered at the origin. The darker-shaded square is the image of this square, dilated by a factor of 0.8 and rotated about the origin by exactly the number of degrees, , so that its corners touch the sides of the parent

127. ## geometry

Three vertices of parallelogram ABCD are (0,0), (5,2) and (8,5). What are the 3 possible locations of the fourth vertex?

128. ## Algebra 2

Can you please explain step by step on how to do this problem? Condense the expression. 2(log base 6 of 15 - log base 6 of 5) + 1/2 log base 6 of 1/25

129. ## geography

I would like your help please? The United Kingdom is currently experiencing one of the most severe financial situations for decades. Many Large scale Government development plans have been scraped. The attention of politican is turning to an ongoing

130. ## Algebra 2

Can you please explain step by step on how to do this problem? Condense the expression. 2(log base 6 of 15 - log base 6 of 5) + 1/2 log base 6 of 1/25

131. ## Algebra

Last month, Stacie spent \$57 on 4 allergy shots and 1 office visit. This month she spent \$9 after 1 office visit and a refund for 2 allergy shots from her insurance company. How much does an office visit cost? An allergy shot?

132. ## physics

You measure a quantity, say A, and it has a 1% uncertainty. If you calculate the value of 100A, its uncertainty will be a. 100% b. 10% c. 1% d. Need more information since it depends on what A is.

133. ## SCIENCE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

when you are using a magnet and a paper clip to detect a magnet from inside the box. WHY is the magnet better than the paper clip to detect another magnet from inside a box?

134. ## math

Can you please give me a example of a - and + multi step equation

135. ## Science

What does a topographic PROFILE (NOT MAP) tell you about an area?

136. ## Chemisty

A certain salt is known to have a solubility in water of 25.2g/100g water at 100°C and 11.4g/100g water at 20°C. The salt is dissolved in 240 g of water at 100°!@#\$%^&il no more solid will dissolve. How much salt will crystallize out when the solution

137. ## physics

A car of mass 1200kg accelerates from rest to a speed of 8.0ms in a time of 2.0s. a)calc the forward driving force acting on the car while it is accelerating. b)At high speeds the resistive frictional force F produced by the air on a body moving with

138. ## Math

e Math Test: grandmother buys grandson a plastic bat & ball for a \$1.10. The bat cost a dollar more than the ball. How much did the ball cost?

139. ## Math

explain why the average change from the start of a period to the end is also zero?

140. ## chemistry

If 20.50 grams of calcium chlorate decompose what mass of each product will form

141. ## chemistry

what is the procedure that is used to find actual yield?

142. ## Art

what is K-12 Art Education Certification???

143. ## industrial electronics N2

Hi, i'm seriously need your help on this subject just to explain the basics, chapter by chapter. i registered a part-time Electrical Engineering and placed me in N2.

144. ## geometry

in triangle ABC, AC is produced to D. If angle A= 60 degrees and B= 85 degrees, find angle BCD

145. ## math

12 yards 2 feet 6 inches to metres. houw can i convert it in a easy way?

146. ## math

what is 360 mils in 6 hours unit rate

147. ## Social Studies

8.Which point in the Virginia Plan was objected to by supporters of the New Jersey Plan? A. Larger states should have more representatvies in Congress B. Congress requires greater power C. The government needs an executive branch D. The government needs a

148. ## English

I urgently need you to check these sentences. Thank you very much for helping me. I don't know a few technical terms. 1) I can see two young men who are probably (working??) on the Stock Exchange. The one in the left-hand side of the picture is analyzing

149. ## algebra

The length of the sides of a square measures 2x-5. The length of a rectangle measures 2x and the width measures x+2. For what value of x is the perimeter of the square the same as the perimeter of the rectangle.

150. ## Math

Tristan reaches a speed of 22 feet per second on his skateboard. How fast is this in miles per hour ?

151. ## math

a farmer has 76 feet of fencing and wants to build a rectanglur pen for his chicken. he wants the greatest area possible, what dimensions should he use?

152. ## math

A board is divided into rectangles each 2/15 in long What is the length of one rectangle written as a decimal

153. ## calculus

An airplane flies at an altitude of 5mies toward a point directly over an observer. The speed of the plain is 600 miles per hour. Find the rate at which the angle of elevation thetha is changing when the angle is 75 degrees. Please help with this question.

Please show me the calculation steps. How do I prepare 10%w/w Hydrochloric acid from 37%w/w Hydrochloric acid? The density of 37%w/w HCl is 1.19g/ml. Thank you.

155. ## electricity

how many volts does a nickel cadmium produce? VOLTAGE FOR ONE CELL

156. ## Science

A ball has a potential energy of 180 J and a kinetic energy of 0 J. After falling 2m, it has a potential energy of 135J. What is its kinetic energy at this point? PLEASE ANSWER THIS I'M STUCK!

158. ## Algrebra-Systems of Equations

Kasey is thinking of 2 munbers. The sum of the two numbers is -18. Their difference is 38. Write a system of equations that can be used to find the numbers.

159. ## trig

I don't know to find the derivative of the following trig functions. Please help. f(x)= cotx h(x0= secx i(x)= cscx

160. ## Science

A skunk is an omnivore because it- A. feeds on insects, mice, berries, and nuts B. can be eaten by hawks and owls C. break down dead animals D. is able to make its own food A.?

161. ## statistics

The time required to travel downtown at am on Monday morning is known to be normally distrubted with a mean of 40 minutes and a standard deviation of 5 minute what is the probability that it will take less than 40 minutes?

162. ## Math

The point A(-2, 3) is translated using T: (x,y) ¨ (x + 4, y + 2). What is the distance from A to A'? square root 6 2 square root 2 5 2 square root 5

163. ## Chemistry

A chemistry student weighs out 0.123 grams of chloroacetic acid into a 250. milliliter volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.2100 moles/liter NaOH solution. Calculate the volume of NaOH solution

164. ## math

18yd________in.

165. ## Chemistry

chemistry student weighs out 0.123 grams of chloroacetic acid (HCH2ClCO2) into a 250. milliliter volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1200 moles/liter NaOH solution. Calculate the volume of NaOH

166. ## Geometry

The point A(-2, 3) is translated using T: (x,y) → (x + 4, y + 2). What is the distance from A to A'? square root 6 2 square root 2 5 2 square root 5

whenever a two-tailed test is being conducted, the the rule of thumb requires which signs?

168. ## Maths

A baker has 9kg of butter. he uses 3/7kg ot bake 5 loaves of bread. How many loaves can he bake with the butter?

asked by mathshelp urgently needed now
169. ## physics

8 1/4 "tall 20 1/4" wide @ bottom what is angle?

171. ## science

one characteristic used to place organisms into kingdoms is: a) how they move b) where they live c) their ability to make food d) their ability to reproduce

172. ## science

a molecule that contains all the information a cell needs to make protein: ATP, carbohydrate, lipid, protein, phospholipid, or nucleic acid?

96ft____yd

174. ## Physics

A 20kg mass is to be pulled up a slope inclined at 30 degree to the horizontal.If the efficiency of the plane is 75% find the force required to pull the load up the plane.

175. ## Algebra

Could someone help me check my answer? Thanks. -Write each quotient as a complex number. 1. 3i/-2+i (Is the answer for this one = 3/5-6i/5)

176. ## physics

A baseball (m = 149 g) approaches a bat horizontally at a speed of 39.8 m/s (89.0 mph) and is hit straight back at a speed of 45.8 m/s (102 mph). If the ball is in contact with the bat for a time of 1.27 ms, what is the average force exerted on the ball by

177. ## Math.

On finding a perimeter and area and there is a decimal for the shape but the 2 other numbers on the shape don't. Do I multiply/add with the decimal on all numbers or only on that 1 number? EXAMPLE There is a triangle one side is 1.5 the base is 2 and the

178. ## Chemistry

A 0.5595 g sample of a compound containing C, H, and O was burned to produce 1.429 g CO2 and 0.5850 g H2O. If the molar mass of the compound was determined to be approximately 86.13 g/mol, what is its molecular formula?

179. ## prpblem solving

A customer enters a store & purchases slippers for \$5, paying for the purchase with \$20 bill. The merchant, unable to make change, ask the grocer next door to change the bill. The merchant then gives the customer the slippers & \$15 change. After the

180. ## MATH

In a drawing for a DVD player, there are 100 tickets in a box. Five of the cards are marked with a star and the rest are marked with an X. To win, Carmen must draw two cards, without replacement, both of which are marked with a star. What is the

181. ## Algrebra

find the value of r so the line that passesthough each pair of points has the given slope(9,r),(6,3),m=-1/3

182. ## ethics

give examples from the field of probation and parole of the edwin meese syndrome

183. ## chemistry

trade winds blow from east to west across the pacific ocean. The winds move surface waters westward across the ocean.this causes deeper, colder water to rise to the surface along the coast.this upwelling of deep ocean waters bring with it nutrients that

184. ## math

what is thee base area of a 56 and 2 cubic cm and 6 nches in height

185. ## algebra

amanda weighs 3/4 as much as er ister. if amanda weighs 129 how musch does her sister weigh? how do you write the equation with x being the sisters weight.

186. ## physics

a baseball is thrown horizontally off a cliff with a speed of 27 m/s. How far has it fallen to the nearest tenth of a meter in 5.2 seconds?

187. ## Math

explain why the average change from the start of a period to the end is also zero?

188. ## Algebra

How do you solve 1/6d + 13 = 20

189. ## Physics

Here is the problem in image form: h t t p : / / i . i m g u r . c o m / g n 1 j R . p n g

190. ## physics

A ball is thrown from a cliff upward with a speed of 21 m/s and at an angle of 56 degrees to the horizontal. How high does it go above the cliff to the nearest tenth of a meter?

191. ## statistics

Suppose that we want to test the claim that the majority (> 50% ) of UOB students read newspapers on a daily basis. We sampled 70 students and found out that 42 of them read newspapers on a daily basis? Test the claim using á=0.10.

192. ## Physics

A 20kg mass is to be pulled up a slope inclined at 30 degree to the horizontal.If the efficiency of the plane is 75% find the force required to pull the load up the plane.

193. ## Science

How far should you push the long end of a lever to make the short end move 17cm?

194. ## electricity

measure resistance with a multimeter in a circuit is the power going to be off or on i think ON

195. ## chemistry(balance equation)

How to balance HNO3 +Cu ------->Cu(NO3)2+NO+H2O ? please show me steps

196. ## geometry

isoceoles triangle Find y find AB Find BC, with AB 4y+6 and BC 6y-3. I don;t understand Thanks

197. ## Physics

This problem contains a graph: h t t p : / / i . i m g u r . c o m / p s z e p . p n g

198. ## physics

At a point in a pipeline the velocity of liquid is 2 m/s and the pressure is 10^5 Pa. what is the pressure at a point 10 m lower than the first one (the cross-section is 1/4th of the previous one and the density of liquid is 800 kg/m^3)

199. ## Math.

Kate bought 3 CDs and 1 DVD at a store. Her friend Joel bought 2 CDs and 2 DVDs. If Kate spent \$20 and Joel spent \$22, determine the cost of a CD and DVD. ~Please provide an explanation as well. Please and thanks!

200. ## Precalc

The figure shows the pre-image and first iteration for a set of transformations. If the iterations are carried on infinitely, the resulting fractal figure will have dimension given by Dimension=(LogN)/Log(1/r) It tells me to find N and r... What should I

201. ## electricity

if you measure voltage with a multimeter are the leads of the circuit connected in a series or parallel its series right

202. ## Math

There's a triangle the numbers on each sides are 22 25 and 11 What is it's perimeter and area? Answer: P is 58 A is 345 There's a rectangle the numbers on 2 of the sides says 4 and 1 What is the Perimeter and area? Answer: P is 10 and A is 4 There's a

203. ## maths

A tank was filled with 20L of water. However, there was a hole and 2/3L was leaked out every minute.How long did it take for the tank to become empty?

asked by urgent help needed pls
204. ## algebra

what is the area for h=10,b1=12,b2=14 on a trapiziod

205. ## physics

what effect does heating a gas have on the particles that make up that gas?

206. ## statistics

The answer to which of the following questions will produce ordinal data? Answer How much time in minutes does it take you to travel to campus? How many hours do you study every week? What is your height in inches? Please mark the age group that best

207. ## Heat Production (Animal Phy)

Assume that an animal consumes 200 ml of O2 in the course of metabolizing 250 mg of food. Determine the probable kind of food the animal has metabolized. How much heat has been produced? I determined the food type by dividing 200 by 250 to get 0.8 ml

208. ## math

Loan #1 Year Amount owed 1 \$3796 2 \$3942 3 \$4088 Loan # 2 Year Amount owed 1 \$977.53 2 \$1036.18 3 1098.35 For loan #1 is simple interest. Loan #2 is compound interest How much was each loan originally Determine the future value of each loan after 10 years

209. ## pennfoster

Which of the following sentences contains a verb in the simple past tense? A. I was working overtime for about six months. B. We helped Joan to pack her things. C. She would like to join us. D. Jenna has driven this route multiple times.

210. ## Social Studies

1.What did the states hope to gain under the Articles of Confederation? A. a strong central government B. freedom, independence, and a firm league of friendship C. a powerful gorvernment D. a strong court system 2.Which of the following BEST describes the

211. ## math

How can I figure out the the estimate the diffrence between 53 and 37?

212. ## physics

A ball is thrown from a cliff upward with a speed of 20 m/s, the angle is 33 degrees and the ball hits the ground 9.2 seconds later, how high is the cliff to the nearest meter?

213. ## math problem

find slope containing pair points (1,3) and (5,-7)

214. ## Math: Need IMEDIATE help

What is the 2012th digit after the decimal point in the decimal expansion of 8/81?

215. ## math problem

solve by substitution method 7x+8y=44 x=41-5y

216. ## Math: Need IMEDIATE help

What is the 2012th digit after the decimal point in the decimal expansion of 8/81?

217. ## composition and communication 1

explain how purpose, audience, tone, and content impact academic writing. Be sure to use the three components of a good paragraph.

218. ## Math: Need IMEDIATE help

What is the 2012th digit after the decimal point in the decimal expansion of 8/81?

219. ## chemistry

120 ml of 3.6 mol/l barium nitrate is added to 7.00 ml of 2.6 mol/l silver sulphate. What is the theoritical yield

220. ## health

whats lung cancer

221. ## AP Gov:US

List three problems of decentralized power that existed under the Articles of Confederation. For each problem you listed, indentify one solution that the Constitution provided to address the problem.

222. ## physics

A 49.4 kg swimmer is standing on a stationary 214 kg floating raft. The swimmer then runs off the raft horizontally with a velocity of +3.60 m/s relative to the shore. Calculate the magnitude of the recoil velocity that the raft would have if there were no

223. ## Cryptography

What is a Cryptography class????

224. ## physics

what is the magnitude of the centripetal force acting on the earth as it orbits the sun assuming a circular orbital speed of 3.00 X 10^4 meters per second

225. ## chemistry

Determine the theoretical and percent yield of hydrogen gas if 78.0 g water undergoes electrolysis to produce hydrogen and oxygen and 3.02 g hydrogen is collected.

226. ## math

in 2nd year Adam owed \$ 977.53, in the 3rd year he owed \$ 1036.18 and in the 4th year he owed \$1098.35 how much was the loan originally, and determine the future value of the loan after 10 years

227. ## 8th grade physical science

You are on roller blades on top of a small hill. Your PE is 1,000.0 Joules. The last time you check your mass was 60.0 kg. What is the height of the hill? if you start skating down this hill, your poetntial energy will be converted to kinetic. At the

228. ## Social Studies

4.What caused Shay's Rebellion? A. Massachusetts had the power to tax its citizens B. Massachusetts needed to pay its debts C. Daniel Shays was an angry farmer D. Massachusetts property taxes were hard on farmers 5. Which of the following was ordered by

229. ## geometry

4 square root 56y8

230. ## english

the antagonist of a story is: a)the hero of the story. b)engaged in a conflict with the main character. c)created to assist the main character. d) the element that creates an emotion in the reader. My answer is (B)

231. ## physics

If the mass of ball A is 5kg and ball B is 75kg, how high should ball B be dropped from so that when B collides with A they stick together and travel to point X?

232. ## Calculus

How do I find the limit of (1+sin(pi times x))^(1/x) as x approaches 0? I tried using wolframalpha, but am unable to understand their steps. My thinking is that you set y=the limit and use L'hopital's rule a couple times. The answer I got was y=e^0--->y=1,

233. ## maths

Simon had 5/6kg of nuts. He repacked them into containers containing 1/3kg of nuts each. How many containers did he fill? How many nuts were left over?

234. ## physics

What constant horizontal force, acting over 16 m of level trail, gives a friction-free 51-kg skier, starting from rest, a speed of 5.7 m/s?

235. ## geometry

If 3 inches represent 18 miles, what do 7 inches represent?

236. ## Statistics

Select a random sample of 30 student responses to question 6, "How many credit hours are you taking this term?" Using the information from this sample, and assuming that our data set is a random sample of all Kaplan statistics students, estimate the

237. ## Statistics

Select a random sample of 30 student responses to question 6, "How many credit hours are you taking this term?" Using the information from this sample, and assuming that our data set is a random sample of all Kaplan statistics students, estimate the

238. ## arithmetic

the sum of the 4th and 8th terms is 10, and the sum of the 6th and 12th terms is 22. Find the first three terms.

239. ## math

How do u find the area of a shape size 7 1/4 square

240. ## math

an oceangraphic research vessel comes across a volcano under the sea. The top of the volcano is 450 ft below the surface and the sea floor is -6,700 below sea level. what is the height of the volcano? show what you are doing to get your answer, explain.

241. ## Math, help needed

Kate bought 3 CDs and 1 DVD at a store. Her friend Joel bought 2 CDs and 2 DVDs. If Kate spent \$20 and Joel spent \$22, determine the cost of a CD and DVD. ~Please provide an explanation as well. Please and thanks!

242. ## language arts

The way a story is told and the voice that tells it are important parts of a story. Choose at least two stories from Collection 3. Analyze the role that the narrator plays in each story. Consider whether the narrator's level of knowledge is limited or

243. ## algebra

LET B BE A BOOLEN ALGEB AND FOR ALL x,y

244. ## math

find the value of -18 + l-12 l show steps. find the value of -l 23- 14 l show steps.

245. ## Electric

measure resistance with a multimeter in a circuit is the power going to be off or on i think ON

246. ## Electric

if you measure voltage with a multimeter are the leads of the circuit connected in a series or parallel its series right

247. ## algebra

LET B BE A BOOLEN ALGEB AND FOR ALL x,y

248. ## algebra 2

how do you find a quadratic equation if you are given the solutions such as x=2/3 and x=-4 right out your answer

249. ## ELA

Which is the best way to revise this sentence? In England during the 1700s, people could be punished for finding fault with government in England A. In England during the 1700s, people who were English could be punished for finding fault with the

250. ## calc

find f'(x) if f(x)=5e^x^2 find f'(x) if f(x)=a^x

251. ## physics

A ball is tossed so that it bounces off the ground, rises to height of 2 m, and then hits the ground again 0.75 m away from the first bounce. a. How long is the ball in the air between the two bounces? b. What is the velocity in the x-direction of the

252. ## tobacco and health

how does tar affect your lungs

253. ## Physics

How do you calculate the earth's gravitational pull on astronauts?

254. ## algebra

The area of a rectangle is 32 square units. Its sides have integral lengths. Find the probability that its perimeter is greater than 30 units.

255. ## calculus

find the derivative of f(x)=2-x^2, a=2

256. ## Calculus

y= [(x-3)/(x^2+1)]^2 I know that I would use the product rule on the whole equation inside the brackets. But would i also do the quotient rule bc of the division?

257. ## Science/Evolution

What do scientists believe that humans and apes originate from?

258. ## geometry

the coordinate of p are (-2,5) and the coordinates of q are (6,1). a.what is the slope of pq? b.what is the equation? c.what are the coordinates of the mp of pq? d. what is the eqquation of the perpendicular bisector of pq?

259. ## Math

What is Discrete Math (DMAT) class????

260. ## math

which number in each pair is greater? how do you know? -31 and -42 -18 and 0

261. ## maths

one bag contains 1 red ball,1 yellow ball, 1green ball and 1 blue ball the second bag contains 1 pink ball and 1 grey ball what is the sample space out come

262. ## physics

A major-league pitcher can throw a baseball in excess of 40.5 m/s. If a ball is thrown horizontally at this speed, how much will it drop by the time it reaches the catcher who is 17.7 m away from the point of release?

263. ## physics

A ball rolls up a ramp and then back down again. The ramp is oriented so that the ball is rolling to the right as it rolls up the ramp. Assume that positive v and a vectors point to the right. Which statement is true about the ball's horizontal

264. ## physics help

A helicopter 7.60 above the ground and descending at 3.90 drops a package from rest (relative to the helicopter). We have chosen the positive positive direction to be upward. The package falls freely. A)Just as it hits the ground, find the velocity of the

265. ## Chemistry

1.Calculate the Theoretical and % Yields of the following equation: 2.What is the limiting and excess reactant? 3.How much excess remains? 2AgNO3 + CaCl2 -> 2AgCl + Ca(NO3)2 mass of 2AgNO3= 1.5g mass of CaCl2= 1.1g (What I have so far): AgNO3: 1.5g(AgNO3)

266. ## math

A customer uses a \$20 bill at a self check-out register to pay for products totaling \$14.50. The customer is concerned they did not receive the proper change. How much money should they have received back from the automated register?

267. ## Physics Problem; CONVERSIONS

PLEASE HELP ME SOLVE !!!! InMay 1998, forest fires in southernMexico and Guatemala spread smoke all the way to Austin. Those fires consumed forest land at a rate of 26900 acres/week. On the average, how many square meters of forest are burned down every

268. ## Physics Problem; CONVERSIONS

PLEASE HELP ME SOLVE !!!! InMay 1998, forest fires in southernMexico and Guatemala spread smoke all the way to Austin. Those fires consumed forest land at a rate of 26900 acres/week. On the average, how many square meters of forest are burned down every

269. ## Science

Suppose you and your bicycle have a total mass of 70 kg. YOu are moving at 10m/s. How much kinetic energy do you and the bicycle have?

270. ## math

Scott uses three 14 gallon tanks of gas a month. What is the average number of gallons he uses daily in a 30 day month? Give your answer to the nearest half gallon

271. ## physics

A major-league pitcher can throw a baseball in excess of 40.5 m/s. If a ball is thrown horizontally at this speed, how much will it drop by the time it reaches the catcher who is 17.7 m away from the point of release?

272. ## Math (different)

What is a Mathematical Modeling class???

273. ## physics

A rocket is fired at a speed of 75.0 m/s from ground level, at an angle of 68.0° above the horizontal. The rocket is fired toward an 11.0 m high wall, which is located 26.5 m away. The rocket attains its launch speed in a negligibly short period of time,

274. ## PHYSICS

In December of 1989, a KLM Boeing 747 airplane carrying 231 passengers entered a cloud of ejecta from an Alaskan volcanic eruption. All four engines went out, and the plane fell from 27800 ft to 13700 ft before the engines could be restarted. It then

275. ## intermediate algebra

need the equation for this problem. Mike invested \$706 for one year. He invested part of it at 5% and the rest at 3% at the end of the year he earned \$28.00 in interest. How much did mike invest at each rate of interest

276. ## Math 7 - Dividng and Multiplying Integers

Find the missing integer for each problem. 1. +18 / ____ = -9 2. ___ / -5 = -6 3. -24 / ____ = +2 4. +18 / ____ = -3 / = dividing My Answers: 1. -2 2. +30 3. +12 4. -6 Are my answers are correct???? Please answer! Thank You! :)

277. ## chemistry

Assuming the temperature and pressure are held constant, which of the gas samples has the greatest number of gas particles? 45.0 mL O3 35.0 mL N2 15.0 mL of CO2 25.0 mL of SO3

278. ## english

what is “Brother” from I Know Why the Caged Bird Sings, about?

279. ## english

what is a good quote, if you chose what would be your quote of the day??

280. ## physics

A boy of mass 8kg falls from rest from a height of 100m, neglecting air resistance calculate his total energy after fallin down a distance of 40m

281. ## Calculus

y= ln3x *e^2x^2 + sin5x^2 find the derivative. i know what to do. but what is the derivative of ln3x? I can plug it into the product rule then nd solve

282. ## Calculus

y= [(x-3)/(x^2+1)]^2 find the derivative. I know i would start off with the chain rule. but would i then continue on and use the quotient rule next?

283. ## ELA

What change should be made in this sentence? That is the job of the Supreme court A. change is to are B. change job to job, C. change court to Court D. make no change C?? What change should be made in this sentence? Technologies such as the Internet have

284. ## physics

If a rock being swung on a rope experiences a centripetal acceleration of 40 m/s2 while traveling at 8 m/s, what is the length of the rope

285. ## english

do you know any poems by robert frost? if so what is your opinion on fire and ice?

286. ## Physics

Pls help with a solution.....a boy of mass 8kg falls from rest from a height of 100m neglecing air resistance calculate his total energy after fallin down a distance of 40m

287. ## ELA

1.Which is the BEST way to improve this sentence? Our leaders believed that was the way to make the country the best it could be. A. Change believed to believe B. Change believed to did not believe C. Change make to made D. Change could be to could not be

288. ## statistics

If we know that the length of time it takes an MBA student to find a parking spot near the DePaul Center follows a normal distribution with a mean of 3.5 minutes and a standard deviation of 1 minute, find the point in the distribution that 75.8% of the MBA

289. ## French

How do I talk about fear in french? The activity is to introduce ourselves (what we like, don't like, find interesting, want to do in life) and then it says: "si vous avez peur de quelque chose." My understanding is that it is asking about things we are

290. ## math

standard form numbers are used around the world for....... 1:speed of light i need 3 more situations when you use standard form

Krystal grilled 21 burgers at a block party. She grilled the same number of pounds of turkey burgers as hamburgers. Each turkey burger weighed 1/4 punds and each hamburger weighed 1/3 pound. How many of each did Krystal grill? ~Please help me and provide

292. ## ENGLISH.......PLZ HELP ME FAST!!!!!!!!!!!!11!

if i wrote about, say my first kiss; say i put i was nervous, i was afraid i wouldn't be a good kisser, and so on, would that be considered a memoir if i posted it on a writing site? im totally confused, xoxo gothgirl-kk

293. ## math

A rectangular piece of property measures 50 feet by 150 feet. The owner decides to surround the property with a fence placed exactly tow feet inside of the property lines. How much fencing will be needed

294. ## english

if you wrote a memoir what would it be about?????

How much must be deposited now, at 6% interest compounded semiannully, to yield an annuity payment of \$4000 at the end of each six month period, for a total of five years?

296. ## english

which pronoun refers to the narrator?

297. ## Geometry

The point A(-2, 3) is translated using T: (x,y) ¨ (x + 4, y + 2). What is the distance from A to A'? square root 6 2 square root 2 5 2 square root

298. ## History

What were the failures of Milliard Fillmore as president?

299. ## Math

One side of a parallelogram has endpoints (3, 3) and (1, 7). What are the endpoints for the side opposite? (8, 1) and (6, 7) (6, 1) and (2, 3) (6, 1) and (8, 5) (8, 1) and (6, 5)

300. ## chemistry

what substances form if we add 3 O 1 Na 1 C and 1 H

301. ## phyics 2

Remarks The gravitational force between the charged constituents of the atom is negligible compared with the electric force between them. The electric force is so strong, however, that any net charge on an object quickly attracts nearby opposite charges,

302. ## Algebra

Krystal grilled 21 burgers at a block party. She grilled the same number of pounds of turkey burgers as hamburgers. Each turkey burger weighed 1/4 pounds and each hamburger weighed 1/3 pound. How many of each did Krystal grill? ~Please help me and provide

303. ## Math( 8th) Rate of change

Khiry has money in a savings account at the bank that increases by the same amount of interesr each year. In 2003 khiry had \$200 in the bank. In 2006, Khiry had \$215 in the bank.In how mnany years will Khiry hav \$230? The cost of gasoline per gallon in

304. ## Physics

billy and amy want to ride their bikes from their neighborhood to school which is 14.4 kilometers away. it takes amy 41 minutes to arrive at school. bill arrives 21 minutes after amy. how much faster (in meters/second) is amy's average speed for the entire