# Questions Asked onDecember 15, 2014

1. ## Physical science

What is the formula of magnesium sulfate and ammonia? My work:MgSO4 + 2NH4OH --> (NH4)2SO4 + Mg(OH)2 Correct/Balance the equation below. MgSO4 + NH4OH → (NH4)2SO4 + Mg(OH)2

2. ## Biology

The creation of sex cells occurs in meiosis. Explain what happens when a new organism is created and life begins. Answer: meiosis is a process of cell division that produces sex cells, or gametes. Gametes are reproductive cells such as the sperm and egg.

3. ## Biology

If there are two sets of 21 chromosomes in a rats lung cell, how many total chromosomes are there in a cell that undergoes mitosis? Answer: 42

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4. ## Physics AP

So there are two blocks that are connected over a light frictionless pulley. Block A has a mass of 2 kg on a frictionless surface while block b has a mass of 1 kg that hangs freely. It asks for speed, change in speed, and tension. I know that tension can

5. ## Science Help!!!!

How does using coal to generate electricity affect the enviroment? A. Using more coal reduces the amount of pollution from using oil. B. Using coal improves the quality of nearby water. C. Using coal, instead od wood from trees, helps improve the

6. ## Chemistry

Last question I'm having trouble with. Predict the oxidation # for astatine. Why?

7. ## Calculus (math)

The volume of the solid obtained by rotating the region enclosed by y=1/x4,y=0,x=1,x=6 about the line x=−2 can be computed using the method of cylindrical shells via an integral. it would be great if you can just even give me the function inside that I

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8. ## Calculus

Use linear approximation to approximate f(0.8) given f(x)=2x^3-3x+1 I'm not sure how to do it without a point given.

9. ## Science Help!!!!

1. Which of the following types of pollution cannotbe attributed to car and truck emissions? A. Acid rain B. Sedimentation C. Ozone D. Photochemical smog 2. In which of the following places is it more difficult to determine if there is pollution? A.

10. ## chemistry

For an atom of sulfur, which electron would require the least amount of energy to remove from the atom? A. 3s2 B. 1s1 C. 3p1 D. 3p4 I think the answer is c or d, preferring d. What would you go with?

11. ## Pre-Algebra

A student is 5 ft tall and casts a shadow 10 ft long. A nearby tree casts a shadow 60 ft long. Find the height h of the tree.

12. ## maths

The denominator of a fraction is 4 more than the numerator. If both the numerator and the denominator are increased by 1, the fraction becomes 4/5. What is the original fraction?

13. ## physics

a jogger does 2.5 *10^5 of work during an exercise routine. her internal energy decreases by 6.8*x10^5. how much heat did she absorb or give off?

14. ## Physics

A ball is thrown upwards with an initial velocity of 16 m/s. What is the velocity of the ball 1.5 s later? After the ball leaves the hand of the thrower, what is the value of acceleration acting on the ball as it is rising upwards? 9.8x1.5 = 14.7.

15. ## Science

The speed of light is 3 x 10 to the 8th power meters per second. If the sun is 1.5 x 10 to the 11th power meters from earth, how many seconds does it take light to reach the earth?

16. ## 7th grade math

Can you check these? 3. Simplify (56/8+3)*2-1 = (7+3)*2-1 = 10*2-1 = 20-1 = 19 9. A spool of lanyard is 21 yards long. If it is cut into pieces that are each 1.75 yards long, how many pieces of lanyard will there be? Ans:21/1.75 = 12 pieces 12. (3/5)x - 10

17. ## Programming

Hi guys! I have a humanitarian turn of mind, and that's why just can't understand programming. On the other hand, I don't want to spoil my average performance. Thus, I have to use homework-help online services, like Homework-Desk. Do you know any other

asked by Sally Sonderson
18. ## math

The area of square field is half hectare. Find the length of its diagonal in meter

19. ## Math

13pi/12=________ degrees: Round to the nearest hundredth.

20. ## english

Type a short character sketch of a fictional Puritan named Justice Johnson based on what you have learned about the Puritans. Make certain that you describe how he dresses, how he lives, what he believes, how he spends his time--in short, describe him so

21. ## American National Government

Each state constitution provides for local entities, including all except (Points : 1) counties. port authorities. municipalities. special districts.

22. ## Algebra

Kendall was playing t-ball and hit the ball off the tee, which is 3 feet off of the ground. If the equation h(t) = -16t2 + 20t + 3 represents the height of the ball at time t, what would the x-intercept represent in the context of this problem? Write your

23. ## Algebra

Ethan kicked a ball from home plate during a kickball game. The height of the ball is represented by h(t) = -16t2 + 25t. What would the vertex of the function represent in the context of this problem? Write you answer using complete sentences.

24. ## Algebra

Joshni threw a ball and its height is represented by the function h(t) = -16t2 + 30t + 5. Explain how she can determine the maximum height the ball reached. Use complete sentences to receive full credit.

25. ## Science

Creativity is always discouraged in scientific endeavors. True or False. I thinks its true.

26. ## Math

Simplify the expression. 3x + 4(x - 6) - 3(x - 7) A. 4x - 45 B. 4x - 3 C. 10x - 3 D. 10x + 45 Is it b?

27. ## Math

students planted 6 equal-size gardens, they divided each garden into 3 equal sections and planted herbs in 2 of the 3 sections, what fraction of the gardens did the students plant with herbs? Shouldn't it be 2/6?

28. ## physics

A skier starts from rest and slides down a 20° incline 100 meters long. if the coefficient of friction is 0.09, how much heat is dissipated into the environment as the skier descends?

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29. ## Physics

Instructions: Read the following paragraph carefully. Then use what you know about momentum, work, and energy to answer the following questions. Be sure to show your work. You are a traffic accident investigator. You have arrived at the scene of an

30. ## Chemistry

Naturally occurring magnesium consists of Magnesium-24 (23.9850 amu; 78.99%), Magnesium-25 (24.9858 amu), and Magnesium-26 (25.9826 amu). Using the average atomic mass from the periodic table, calculate the closest percent abundance of Magnesuim-26. a)

31. ## Algebra 1

What is an equation of the line with slope 6 and y intercept -4?

(2x+5y)0=?

33. ## language arts

I'm in Jonny Tremain chapter 5 1. Which of the following is the most significant event in the plot following Jonny's accident? A. Johnny releases that Rab and his uncle are Whigs B. Rab teaches Jonny how to ride Goblin C Mrs. Lapham recruits Mr. Tweedie to

34. ## history

1. Which state was added to the union as a result of the compromise of 1850 A. Maine B. Missouri C. Nebraska D. California*** 2. What issue was at stake when free and slave states reached the Missouri compromise A. Power*** B. Tariffs C. Abolition D.

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35. ## Physics

Instructions: Read the following paragraph carefully. Then use what you know about momentum, work, and energy to answer the following questions. Be sure to show your work. You are a traffic accident investigator. You have arrived at the scene of an

36. ## language arts

Which of the following sentences from the novel johnny remain (chapter 5) provides evidence that Rab is having a positive effect on Johnny? A. he liked to make a handsome entrance. Even if he and Goblin had dawdled a bit on country roads, they both liked

37. ## astronomy

If you’re trying to build a house north of an old pine forrest (∼50m tall trees). How far north must you be from the edge of the forrest in order to ensure that you see at least a bit of the Sun even during the winter solstice?

38. ## Chemistry

Outline the prepartion of 2-chlorobutane from an alcohol?

39. ## algebra

15y-21=3(5y-7)

40. ## Chemistry

A compound D, CH3CHCLCH2CH3 was boiled under reflux for some time with dilute NaOH solution.. Dilute nitric acid was then added to the mixture, followed by dilute silver nitrate solution. A Few drops of concentrated ammonia solution were then added. What

41. ## Chemistry

What is product form when 2-bromobutane reacts with potassium cyanide in ethanol?

42. ## physics

A full shopping cart requires a force of 88.0 Newtons to move across a horizontal floor at a constant velocity. If the cart has a mass of 32.1 kg, what is the coefficient of kinetic friction between the cart and the floor?

43. ## History 2

the public school system in georgia was the result of laws passed during A. World War 1 B. The Civil War C. Reconstruction **** D. Antebellum

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44. ## physics

A dragster starts from rest and accelerates down a track. Each tire has a radius of 0.320 m and rolls without slipping. At a distance of 382 m, the angular speed of the wheels is 255 rad/s. Determine (a) the linear speed of the dragster and (b) the

45. ## uthm

8) A man owns two building supply stores, one on the east side and one on the west side of the city. Two customers order some inch plywood. Customer A needs 50 sheets and customer B needs 70 sheets. The east side store has 80 sheets and the west side store

46. ## animals

A stray dog used to bark at the locals in the street. However each time whenever the person who is barked at, approached the dog, it would run away cowardly. a.Why does the dog keeps on barking in a threatening manner whereas it is actually afraid of the

47. ## physics

Calculate the half-life of a radioactive substance that decays by a factor of 3 in concentration every 1 million years

48. ## Science

During exercise your body's blood pressure increases as it cool down the body's blood pressure slowly returns to its normal state this is know as?

49. ## Physics

In an electricity experiment, a 0.900g plastic ball is suspended on a 50.0cm long string and given an electric charge. A charged rod brought near the ball exerts a horizontal electrical force F⃗ elec on it, causing the ball to swing out to a 23.0∘

50. ## chemistry

What is an ionic solid? A. One positive ion and one negative ion bonded to form a solid B. Many nonmetal atoms bonded together to form a solid C. Many positive and negative ions bonded to form a solid D. Many metal atoms bonded together to form a solid I

51. ## calculus

there are no examples of this type of problem in my book so if you could help walk me through it - that would be extremely helpful. thanks ahead of time. Find the extreme values of the function on the interval and where they occur. 4) F(x)=³√(x); -3

52. ## Chemistry 120

Calculate the pH of aqueous solution 0.0000019 M KOH

asked by David Allen
53. ## chemistry

Malic acid is a weak diprotic organic acid with K1 = 4.0x 10-4 and K2 = 9.0 x 10-6. (a) Letting the symbol H2A represent malic acid, write the chemical equations that represent K1 and K2 . Write the chemical equation that represents K] xK2 . (b)

54. ## chemistry

Under standard conditions for all concentrations, the following reaction is spontaneous at 25 ¢XC with EO = 0.16 V. + - 02 (g) + 4 H (aq) + 4 Br (aq) -+ 2 H20 (I) + 2 Br2 (1) If [H+] is a?justed by adding a buffer of 0.10 M NaOCN and 0.10 M HOCN (Ka = 3.5

55. ## Math

Penn writes a 2013-term arithmetic sequence of positive integers, and Teller writes a different 2013-term arithmetic sequence of integers. Teller's first term is the negative of Penn's first term. Each then finds the sum of terms in his sequence. If their

56. ## Math

Laverne starts counting out loud by 5's. She starts with 7. As Laverne counts, Shirley sums the numbers Laverne says. When the sum finally exceeds 5000, Shirley runs screaming from the room. What number did Laverne last say before Shirley flees?

57. ## urgent help statistic

A random sample of 20 people who resided within the u.s resulted in average viewing time of 4.76 hrs per day with a sample standard deviation of 2.297 hrs. obtain and interpret a 95% confidence interval, for the mean viewing time of all americans

58. ## CAL

The slope of the line normal to the graph of 4 sin x – 9 cos y = 9 at the point (x,0)? How do you do this?

59. ## Any math tutor online? Help

Two companies charge these rates for printing a brochure : Company A charges \$175 for set up and 0.10 pet brochure Company B charges \$250 for set up and 0.07 pee brochure A linear system that model this situation is C=175 + 0.10n C =250+ 0.07 Where c is

60. ## history 3

compare and contrast the experience of the creeks and cherokees in Georgia following the war of 1812 ? help please!!

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61. ## Car Design

What other subject area is used with art for a career in car design? Language Arts history math health I think math

62. ## Math

Natalia constructed a right triangle with two side lengths measuring 3 and 5 units. She constructed a second right triangle similar to the first one, with the two corresponding sides measuring 5.1 and x units in length, respectively. What is the missing

63. ## astronomy

if our Sun was replaced by a star twice the mass, how many days would our year be?

64. ## math

In the equation 1/5 (x-50)=25 X represents the number of pages of a book.

65. ## chemistry

A. Orbital shape B. Orientation in the orbital C. Main energy level D. Electron spin

66. ## chemistry

If your car gets 21.4 mpg, how many L of CO2, will you release into the atmosphere, if you drove the 1280miles from Towson University to key West Florida for a much needed break after taking Chemistry 121? Assume 1.05atm and 17.0C. What would your carbon

67. ## History

compare and contrast the experience of the creeks and cherokees in Georgia following the war of 1812

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68. ## chemistry

If your car gets 21.4 mpg, how many L of CO2, will you release into the atmosphere, if you drove the 1280miles from Towson University to key West Florida for a much needed break after taking Chemistry 121? Assume 1.05atm and 17.0C. What would your carbon

69. ## Chem Moles

Use this equation: N2 + 3 H2 ---> 2 NH3 If 3.00 moles of H2 were used, how many moles of NH3 would be made? If 0.600 moles of NH3 were produced, how many moles of H2 are required?

asked by Theresa Kent
70. ## Chemistry

Which electron would have the highest ionization energy for an oxygen atom? A. 2nd B. 1st C. 5th D. 6th If it is the highest I was guessing b or d.

71. ## calc

A vector parallel to the tangent to the curve x=3t^(4/3) y=2t^3 -1 z= 2/(t^2) at the point (3,-3,2) on the curve is: the answer is how do you get this??

72. ## astro

The intensity of an object is related to the distance d to the observer by the equation (I1/I2) = (d2/d1)2. If the apparent magnitude of the Sun seen from Earth has a value of -26.74, what is the apparent magnitude of the Sun seen from Neptune (30AU from

73. ## chemistry

If your car gets 21.4 mpg, how many L of CO2, will you release into the atmosphere, if you drove the 1280miles from Towson University to Key West Florida for a much needed break after taking Chemistry 121? Assume 1.05atm and 17.0C. What would your carbon

74. ## Language arts-Johnny Tremain

how has the political climate of Boston changed since the beginning of the book?

75. ## language arts

Johnny Tremain How does Rab's reaction to Johnny's hand compare to that of other people's? A like others, Rab is horrified B While others react with disgust or pity, Rab ignores the injury until Johnny mentions his band hand C Rab expresses great pity for

76. ## social studies

Is the Boston Massacre appropriately named.

77. ## Chemistry

I'm stumped 4ko2 + 2co2 ----2k2co3 + 3o2 What mass of k02 in grams is required to react with 8.90 l at 22.0 c and 767 mm hg? Please help thank you

78. ## Math

What do you do to check whether a number is rational or irrational? In your explanation, use an example of an irrational and a rational number. How does finding the square root of a number compare to finding the cube root of a number? Use the number 64 in

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79. ## Math HELP!

Consider the function y = 3x5 – 25x3 + 60x + 1. Use the first or second derivative test to test the critical points. How many relative maxima did you find? 0 1 2

80. ## math

Megan is making bracelets to sell to earn money for the local animal shelter It takes her 1/4 hour to pick out all the beads and 1/10 hour to string them. This week, she only has 5 1/4 hours to make bracelets. How many bracelets will Megan be able to make?

81. ## math

Tide's boat rental charges a rental fee of \$200 plus \$30 per hour. Surfs rental charges a rental fee of \$240 plus \$25 per hour. For what number of hours is the boat rental cost the same at each rental business

82. ## Math

Estimate each product of 4 5/8 x 1/3=

83. ## Langue Art

callie the meaning that best matches the word in italics. The (inflamatory) remarks of men such as Sam Adams and James Otis did much to move the colonists to revolt against England. A. Carelessly worded B. Meant to cause peace C. Ambigous or unclear D.

84. ## math

Megan rented a car that cost \$35 per day plus \$0.20 per mile for each mile driven. Which expression shows the cost of renting the car for 2 days and driving 180 miles?

85. ## math

Ok. The question is 'How does the ratio of two side lengths within one figure compare to the ratio of the corresponding side lengths in the other figure?' if you just give me a hint on this please!

86. ## division

9/72=8 56/7=8 49/6=8 36/9=4 64/8=8 6/24=4 5/25=5 3/15=5 Easy I'm in fifth grade and I know this 😜

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87. ## Science Help!!!!

To solve the problem of a polluted stream a scientist traced where the pollution was coming from. She determined that the pollution was coming from many small sources. She worked on a plan to help reduce the pollution to the stream. This is an example of

88. ## Policing

During what decade were the precepts and designs of new-generation jails first introduced and adopted? a. the 1960s b. the 1970s c. the 1980s d. the 1990s is it B

89. ## Economics

What are two reasons why the values of corporations fluctuate? Explain. My answer: Competition and events in the world

90. ## calc

a lamina in the xy plane is bounded by y=0,x=0 and 2x + y=2 has mass density at (x,y) equal to the distance to the x-axis. find the mass of the lamina. the part that is tripping me up is the mass density

91. ## chemistry(solutions)

What is the % w/v of 13.2 g of salt dissolved in 264 mL of solvent?

92. ## Policing

Which of the following statements most accurately reflects parole board membership in the United States? a. Parole boards include 5-8 members. b. States that have abolished parole release may still have parole boards. c. Parole boards are appointed by a

93. ## math

what is recipricol and can you give me an example. thank you

94. ## math

When a grizzly bear hibernates, its heart rate drops to 10 beats per minute, which is 20% of its normal value. What is a grizzly bear's normal heart rate when not hibernating?

95. ## math

An estimated 3 out of every 25 men are left-handed. What percent of men are left-handed?

96. ## math

Emily's family loves to work together in the garden. They have a slight preference for flowers, as 60% of their plants are flowers and 40% are vegetables. They have 50 plants growing in the garden. How many vegetable plants do they have?

97. ## Science help

(Blank) are nonrenewable resources that are used around the world because they are relatively inexpensive. My answer Fossil fuels Am I right?

98. ## Math

Marie wants to draw a painting with an area of 40 square inches. If she draws her painting on 1inch grid paper how many squares would the painting coved. tell why

99. ## Technology

The magnitude of harm that could result from the development of a technological project, and the population on whom this harm predominantly falls, is an ethical question related to: public harms of aggregation. whistle-blowing. distributive justice.

100. ## Technology

According to Alan Durning, the basic value of a sustainable society is: A. that any society's consumption levels must be tied to locally available resources. B. each generation should meet its needs without jeopardizing the prospects of future generations

101. ## Science help

A homeowner determined that he used 114 gallons of oil every month to heat his home in the winter. This information would be considered part of his My answer Carbon footprint Am I right?

102. ## Society and Tech

The current global growth pattern adds about __________ people to the world every year. 90 million 200 million 695 million 1 billion is it 90 million?

103. ## Math

How much more money? The ratio of Beatriz’s savings to Hannah’s savings is 4 : 7. The ratio of Hannah’s savings to Julia’s savings is 3 : 5. The three girls have a total savings of \$136. How much more money has Julia saved than Beatriz? Explain how

104. ## Society and Tech

According to Joel Cohen, head of the laboratory of populations at Rockefeller University, the earth's carrying capacity for human populations depends upon: A. reducing meat consumption. B. eliminating social barriers to innovation. C. individual choices

105. ## Economics

according to the law of supply the higher the price A the more consumers are willing to pay B the larger the quantity produced c the smaller the quantity produced D the more the availability of a good is reduced

106. ## Science help

In the ocean, there are areas where there are very few living things. (Blank) is the term that described when this happens to a natural gas. My answrer Aquaculture Am I right?

107. ## math

A health researcher wanted to know if there was a difference in success rates between three methods of quitting smoking: A, B, and C. She designed a study with 15 participants, 5 in each group, and asked participants to track how many cigarettes they

108. ## chemistry

A 14 karat gold alloy contains 58% m/m gold. How much of this alloy can a jeweler make using 50.0 g of pure gold?

109. ## Economics

What is an oligopoly? A. An agreement by a formal organization of producers to coordinate prices and production B A market structure in which a few large firms dominate the market C A market structure in which two firms have a price way D a market

110. ## Society and Tech

According to the textbook, __________ became the greatest human experiment with radiation exposure; this is based on the curies (ci) of radiation that were released as a result. the accident at Chernobyl Hiroshima bombing Nagasaki bombing the accident at

111. ## english

Is sandwich a compound word?

112. ## English

Which Greek root means “relating to color”? Not sure which one it is. chrys chron chord chrom

113. ## Math

If Log27 in base5=x and Log5 in base3=y., find xy

114. ## Stats

Research shows that 14% of 6th graders in K-6 schools have tried cigarettes and 61% of 7th graders in 8-9 or 7-9 middle schools have tried cigarettes. what is the absolute increase to the nearest percent? A. 77% B. 336% C. 436% D. 47% I don't know this one

115. ## MATH

if the legs of a right triangle have lengths of 6 inches and 8 inches what is the length of the hypotenuse in inches A. 11 B. 13 C. 10 D. 16***

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116. ## Finance

Due to a recession, expected inflation this year is only 2.75%. However, the inflation rate in Year 2 and thereafter is expected to be constant at some level above 2.75%. Assume that expectations theory holds and the real risk-free rate is r* = 3%. If the

117. ## Math

Mary's parents decide to give her an allowance every Saturday. The first Saturday they give her .01 cent. For each successive week they double the amount given the previous week. If Mary saves her allowance, in how many weeks will she be a millionaire?

118. ## chemistry(ppm parts per million)

How would i calculate 2.34 mg x 10^6 divided by 3.50 kg

119. ## English

What is the meter of the following line from “A Sybil” by Rilke? “Her age became too much to say” Im confused and cant find an answer. Iambic pentameter Iambic tetrameter Trochaic pentameter Trochaic tetrameter

A certain colony of bacteria triples in length every 10 minutes. It's length is now 1 millimeter. How long will it be in 40 minutes? Please help answer thx

121. ## Algebra ASAP thx

Tim is reading a book. On Monday he reads 3 pages. On each day after that, he reads 3 times the number of pages that he read on the previous day. How many pages does he read on Thursday?

122. ## Algebra 1 thx

Hadley's softball team has a phone tree in case a game is canceled. The coach calls 3 players. Then each of those players calls 3 players, and so on. How many players will be notified during the third round of calls? Please help answer

123. ## Algebra 1

The square tile shown has a side length of 10.5 inches. What power can you write to represent the area of the tile? Write the power as an expression with a base and exponent, and then find the area of the square.

124. ## Math

A museum calculates the rate for groups using the equationC=4P+8,where P is the number of people and C is the total cost in dollars. If the cost for a group is \$60, how many people are in the group?

125. ## Chemistry

The heat of combustion of benzene, C6H6, is -41.74 kJ/g. Combustion of 3.65 of benzene causes a temperature rise of 4.41 C^o in a certain bomb calorimeter. What is the heat capacity of this bomb calorimeter? (kJ/C^o) So, I what I did was I multiplied

126. ## English

“You may well ask, ‘Why direct action? Why sit-ins, marches, etc.? Isn't negotiation a better path?’" Which best describes the syntax of this passage? Im stuck with this Figurative Parallel Choppy Rhetorical

127. ## chemistry

In the Bohr model, which is the lowest energy state available for an electron? A. nth B. excited state C. first state D. ground state Im thinking the answer is c or d.

128. ## chemistry

write a chemical reaction for lead2 nitrate + sodium iodide ->

129. ## math

How much more money? The ratio of Beatriz’s savings to Hannah’s savings is 4 : 7. The ratio of Hannah’s savings to Julia’s savings is 3 : 5. The three girls have a total savings of \$136. How much more money has Julia saved than Beatriz? Explain how

-5(-1+6)

131. ## Ceramics (help!!!)

When creating clay forms what must be done with inside?? When applying glaze to a ceramics piece, it is important to wax the foot, or the bottom of the piece. What might happen if it isn't waxed??

132. ## Urgent geometry help

On my test over parallel lines and proportional parts in triangles today, there was a question that asked to solve for x. There was 2 problems with x in them in the triangle. So would I just have to multiply each part by two and set them equal to each

133. ## Math

Evaluate 1/3 + square root(3)/12 + 1/16 + square root (3)/64. I hope this makes sense. Right now we're learning sequences and series and I'm really confused on this question.

134. ## Science

9. If the following graph represents the decay of strontium-90 in an igneous rock, what event occurred at 0 years on the horizontal axis? There is a picture but I cant upload it. Please help me!

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135. ## Maths

A rectangle field is twice as long as its width and is surrounded by a fence 180 meters long, find the length of the field

136. ## French

Is this grammatically correct? J'aime jouer à des jeux vidéo.

137. ## math

teacher has 27 students. she asks the students to form as many groups of 4 as possible. How many students will not be in a group?

138. ## essex couty college

translate this sentence into an equation rita's score decreased by 16 is 61

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139. ## chemistry

gasoline sold in ontario must contain at least 5.00% v/v ethanol? How much gasoline contains 1.50 L of ethanol

140. ## AP Calc B/C

The base of a solid is the region enclosed by y=x^3 and the x-axis on the interval [0,4]. Cross sections perpendicular to the x-axis are semicircles with diameter in the plain of the base. Write an integral that represents the volume of the solid. I drew a

141. ## AP Calc BC

Solve the differential equation y'= radical(x)/(-3y) i made y' dy/dx and moved the y's to one side and the x's to the other, and ended up with y^2=(-4/9)x^3/2 + c, but i'm not sure if that's write, and is that the form i'm supposed to leave it in?

142. ## Help

There are 2 piles of papers on a desk. Each pile has the same number of papers. There are 12 papers in all on the desk. How many papers are in each pile?

143. ## MATH 4TH GRADE

Teacher has 27 students. She asks the students to form as many groups of 4 as possible. How many students will not be in a group?

144. ## Math

Why are the estimates of 6/10 x 18 shown below different? Is one estimate better than the other?

145. ## math

The Eskimos are trying to generate more money because player wages are increasing. they have came up with a couple of plans: Plan 1 : they are going to open up 1850 new seats in the endzone that will be reserved for family seating. they project that they

146. ## MATH

A carpenter has a board that is 10 feet long. He wants to make 6 table legs that are all the same length. What is the longest each leg can be? Thanks

147. ## Math Plz dont ignore Plz

The Eskimos are trying to generate more money because player wages are increasing. they have came up with a couple of plans: Plan 1 : they are going to open up 1850 new seats in the endzone that will be reserved for family seating. they project that they

148. ## psychology

Dr. Comer points out risks of adolescence, such as alcoholism, drug abuse, and teen pregnancy

149. ## MATH

A sporting goods company can ship 6 footballs in each carton. How many cartons are needed to ship 75 footballs? Explain how you did it?

150. ## Algebra 1 thx

Antonia is saving for a video game. On the first day, she saves two dollars in her piggy bank. Each day after that, she doubles the number of dollars she saved on the previous day. How many dollars does she save on the sixth day?

151. ## alegebra / math

How much more money? The ratio of Beatriz’s savings to Hannah’s savings is 4 : 7. The ratio of Hannah’s savings to Julia’s savings is 3 : 5. The three girls have a total savings of \$136. How much more money has Julia saved than Beatriz? Explain how

152. ## physics

How much work is required to accelerate a 0.145 kg baseball from rest, to a speed of 38.7 m/s?

153. ## physics

A student wearing frictionless in-line skates on a horizontal surface is pushed, from rest, by a friend with a constant force of 45 N. How far must the student be pushed, starting from rest, so that her final kinetic energy is 352 J?

154. ## physics

A 75 kg bobsled is pushed along a horizontal surface by two athletes. After the bobsled is pushed a distance of 4.5 m starting from an initial speed of 1.2 m/s, its speed is 6.0 m/s. What is the change in kinetic energy? Find the magnitude of the net force

155. ## MATH

A carpenter has a board that is 10 feet long. He wants to make 6 table legs that are all the same length. What is the longest each leg can be? Please explain how you find a sum of this problem.

156. ## math

The Eskimos are trying to generate more money because player wages are increasing. they have came up with a couple of plans: Plan 1 : they are going to open up 1850 new seats in the endzone that will be reserved for family seating. they project that they

157. ## psychology

Dr. Comer points out risks of adolescence, such as alcoholism, drug abuse, and teen pregnancy A) are more severe in lower socioeconomic groups B) are virtually nonexistent in middle-income children C) exist for all children, regardless of income level D)

158. ## psychology

Which of the following is the MOST accurate conclusion one can draw about the mental health field? A) Mental health professionals are gaining respect in society. B) What mental health professionals know and can do outweighs what they do not know and cannot

159. ## Math

Let a1,a2,......a10 be an arithmetic sequence. If a1+a3+a5+a7+a9=17 and a2+a4+a6+a8+a10=15 then find a1.

160. ## psychology

51. Given the changes in sex-offender laws, the emphasis of concern appears to be swinging toward: A) protecting children. B) sympathizing with sex offenders. C) white Americans. D) states' rights

161. ## chemistry

since 1991, house paint produced in Canada must contain no more than 600 ppm of lead. What is the maximum mass of lead permitted ion a 2.50 kg can of paint?

162. ## Chemistry

What is an ionic solid? A. One positive ion and one negative ion bonded to form a solid B. Many nonmetal atoms bonded together to form a solid C. Many positive and negative ions bonded to form a solid D. Many metal atoms bonded together to form a solid I

163. ## chemistry

What mass of sodium hydroxide pellets must be poured into a waste drum containing 20.0 L o 3.0 mol/L sulphuric acid to completely neutralize the waste acid solution? Write a balanced chemical equation for this reaction. okay, so here is the work I already

164. ## Science help

A (blank) is a tool used to capture the energy in sunlight. My answer Photochemical Am I right?

165. ## Math

Zach had to make bracelets for Student Council. He made 10 of them on Monday and 2/5 of them on Tuesday. Zach completed the remaining 1/2 on Wednesday. How many bracelets for Student Council did Zach have to make? Tuesday = 2/5 = 4/10 of the total.

166. ## Science help

1.Some plastics are made from corn. These plastics are biodegradeable. This means that plastics made from corn will (blank) than regular plastic My answer decompose faster 2. In the ocean, there are areas where there are very few living things. (Blank) is

167. ## math

A boat traveled 210 miles downstream and back. The trip downstream took 10 hours. The trip back took 70 hours. What is the speed of the boat in still water. What is the speed of the current?

168. ## chemistry

Find the molar concentration of 57.9 g of potassium chlorate dissolved in 975 mL of water

169. ## math

lamina in the xy plane is bounded by y=0,x=0 and 2x + y=2 has mass density at (x,y) equal to the distance to the x-axis. find the mass of the lamina. the part that is tripping me up is the mass density

170. ## Quick math help

On my test over parallel lines and proportional parts in triangles today, there was a question that asked to solve for x. There was 2 problems with x in them in the triangle. So would I just have to multiply each part by two and set them equal to each

171. ## Algebra 1

what is the equation to y= -1/12x+4 so that the 2nd line is parallel?

172. ## science 1 question

which of the following is an example of an effect of natural selection? All of the children of two parents are male. Carbon cycles through ecosystem. Favorable environmental conditions cause an increased food supply. Polar bears have white fur. Is the

173. ## physics

Calculate the maximum deceleration of a car that is heading down a 14.5° slope (one that makes an angle of 14.5° with the horizontal) under the following road conditions. You may assume that the weight of the car is evenly distributed on all four tires

174. ## chemistry

Which statement best describes what must occur for two atoms to combine to form a chemical bond? A. The electrons of one nucleus must transfer to the nucleus of the second atom for a chemical bond to form. B. The repulsive forces of both nuclei must

175. ## Chemistry

2C2H6+702---->4CO2+6H20 DELTAH= -3120.6 kJ/mol What mass of ethane must be combusted in order to heat 366 g of water from 25 degree celcius to 100 degree celcius? Assume the heat transfer is 100% efficient. a)44.1 g b) .903g c) 3.61g d) 2.21 g Should I

176. ## Calculus

Find the derivative of 1/(1+(x-3)^2) Steps would be appreciated.

177. ## Chemistry

How do you know that a given reaction is not an acid base reaction? (apart from the fact that it should have an acid and a base and it should be a double displacement reaction)? I mean I know acids have protons (H+) and bases have hydroxides (OH-) but

178. ## pre algebra

Two bank robbers flee at 60 mph. 26 minutes later, a police helicopter follows at 120mph. How long til they catch them? I figured 39 minutes. I takes the police 13 minutes to get to the 26 mile mark. Then the robbers move 13 miles forward. then the police

179. ## Nicola

Hello, I need some help with a few questions about this poem: She was a Phantom of delight When first she gleamed upon my sight; A lovely Apparition, sent To be a moment's ornament; Her eyes as stars of Twilight fair;  Like Twilight's, too, her dusky

180. ## physics

A person sitting in a chair (combined mass 80kg) is attached to a 6m long cable. The person moves in a horizontal circle. The cables angle is 62 degrees below the horizontal. What is the persons speed? Note: the radius of the circle is not 6m. I really

181. ## general chemistry

If 1.0 g samples of each compound were dehydrated, which sample would lose the greatest mass of water? Molar Masses: LiCl* H2O= 60. g mol–1 MgSO4* H2O= 138. g mol–1 FeSO4*H2O= 170. g mol–1 SrC2O4*H2O=194. g mol–1

182. ## general chemistry

Which produces the greatest number of ions when one mole dissolves in water? (A) NaCl (B) NH4Cl C) NH4NO3 (D) Na2SO4

183. ## Algebra 3

Suppose you are tossing an apple up to your friend on a third-story balcony. After x seconds the height of the apple is given by h= -16t^2+38.4t+0.96. Your friend catches the apple just as it reaches its highest point. How long does it take for the apple

184. ## Algebra 1

suppose you can work a total of no more than 20 hours per week at your two jobs. Babysitting pays \$5 per hour, and your cashier job pays \$6 per hour. youneed to earn at least \$90per week to cover your expenses. Write a system of inequalities that show s

185. ## Math

Write each of the fractions below as a division expression. Then write each fraction as a whole number or mixed number (I need help with this, because it confuses me as to how to write it as a division expression. Also sorry for no work saw.) 1. 5/4 2.

186. ## Math

Part (a): Find the sum a+(a+1)+(a+2)+.....+(a+n-1) in terms of a and n Part (b): Find all pairs of positive integers (a,n) such that n>= 2 and a+a+1)+(a+2)+....+(a+n-1)=100.

187. ## Physics

I don't completely understand what this question is asking: Three people are standing on a horizontally rotating platform in an amusement park. One person is almost at the edge, the second one is (3/5)R from the center, and the third is (1/2)R from the

188. ## Math

Find the general term of the geometric sequence 36 , 6 , 1 , 1/6 , 1/36 ,... .

189. ## Math

Write the sum (in sigma notation) 1 + 3/2 + 2 + 5/2 + 3 + 7/2 + 4 Sigma notation?

190. ## MATH

Find the sum 4 Σ(0.5)^n n=0

191. ## Science

Why are there variations in atmospheric pressure how was this proven? Why do your ear pop when trebling to different altitudes?

192. ## Math

Find the sum of the series -4 + 1 -1/4 + 1/16 - 1/64 + 1/256 + ... .

193. ## american national governement

The basis for national power lies in... A.) The interstate commerce clause only B.) The supremacy clause andnthebtreaty clause only C.) The trwaty clause and the interstate clause only D.) The interstate commerce, supremacy, and treaty clauses

194. ## Chemistry

2HCl+Pb(NO3)2---> PbCl2 (s)+2HNO3 Can you please tell why this is not an acid base reaction?

195. ## algebra

joe is planning a 5 hour canoe trip. he can paddle 4 miles per hour in still water and the current is 3 miles per hour. how far downstream can he go?

196. ## science

why is it rare for the soft parts of an organism to become a fossil? a) the soft parts take a long time to decay b) the soft parts can be eaten by animals***** c) the soft parts cannot be buried in sediment d) the soft parts form petrified fossils which of

197. ## math

A piece of plywood 24 inches wide is cut into strips 2 1/2 inches wide. How many strips of this width can be cut?

198. ## math algebra

A rectangular box has a length of 8 ft and a width of 2 ft. The length of the three dimentional diagonal is 10 ft. What is the height of the box? I think answer is 12.96, but not sure. any help is appreciated thanks in advance

199. ## English 4

Locate a brief passage (about a paragraph in length) from The Red Badge of Courage that describes the course of an assault using details and mental associations rather than factual or realistic representation. Contrast it with the following excerpt

200. ## Math

I am a number between 20 and 30. When you put me into 7 equal groups, there is an odd number in each group and 2 are left over. What number am I

201. ## basic chemistry

If 0.50 mol of Na3PO4 is mixed with 0.30 mol of BaCl2, the maximum number of moles of barium phosphate which can be formed is: How do i set up the problem?

202. ## Chemistry

If a 40 gram sample of radioactive isotope was present at 4pm, but a 5 gram sample remained at 4:30 pm, what is the half-life in minutes?

203. ## Psychology

A researcher has conducted an experiment in which she has given participants a placebo, 10mg, and 20mg of a drug. She then measured their anxiety, blood pressure, and heart rate in response to the drug. How many levels does this experiment’s independent