# Questions Asked onDecember 19, 2012

1. ## help hexagon geometry

A regular hexagon is inscribed in a circle and another regular hexagon is circumscribed about the same circle. What is the ratio of the area of the larger hexagon to the area of the smaller hexagon? Express your answer as a common fraction. How is this

2. ## Zoology

1. what is the economic importance of Noctiluca? 2. what is the economic importance of Volvox?

3. ## math

Christina Hercher borrowed \$50,000 on a 90 day, eight percent note. Christina paid \$3,000 toward the note on day 40. On day 60 she paid an additional \$4,000. Using the U.S. Rule, Christina's adjusted balance after the first payment is: (Points : 1)

4. ## chemistry

Instant cold packs, often used to ice athletic injuries on the field, contain ammonium nitrate and water separated by a thin plastic divider. When the divider is broken, the ammonium nitrate dissolves according to the following endothermic reaction:

5. ## CHEMISTRY HELP ASAP

A 1.26 g sample of He gas has a pressure of 0.123 atm and a volume of 32.6 L. What is the temperature of the sample, in °C?

6. ## algebra

The sum of two numbers is 56. the larger number is 7 less than 3 times the smaller number. Find the smaller number.

7. ## chemistry

The air within a piston equipped with a cylinder absorbs 570J of heat and expands from an initial volume of 0.12L to a final volume of 0.88L against an external pressure of 1.0 atm. What is the change in internal energy of the air within the piston?

8. ## Physics

A 4 kg block rests between the floor and a 3 kg block. The 3 kg block is tied to a wall by a horizontal rope. If the coefficient of static friction is 0.800 between each pair of surfaces in contact, what force must be applied horizontally to the 4 kg block

9. ## Biology- check my answer (diff one)

Which of the following are true concerning living things? Check all that apply. A)They contain a vital force absent in nonliving things. B)They are composed of molecules that contain carbon-carbon bonds. C)They undergo chemical reactions to use energy they

10. ## Algebra

In triangle GHI, angle H is a right angle, GH=40, and cos G=40/41. Find each value in fraction and in decimal form. a. sin G b. sin I c. cot G d. csc G e. cos I f. sec H

11. ## math

which of the following expresses 374,274 in scientific notation? 1] 3.74274 x 105 2] 3.74274 x 106 3] 37.4274 x 106 4] 374.274 x 105 5] 3742.74 x 103

12. ## ASAP help CHEMISTRY

A cyclopropane-oxygen mixture is used as an anesthetic. If the partial pressure of cyclopropane in the mixture is 334 mmHg and the partial pressure of the oxygen is 1.02 atm, what is the total pressure of the mixture in torr?

13. ## Physical Science

An exercise spring has a spring constant of 315 N/m. How much work is required to stretch the spring 30 cm? What force is needed to stretch the spring 30 cm?

14. ## Chem- REALLY URGENT!!!

2. Methane (CH4), ammonia (NH3), and oxygen (O2) can react to form hydrogen cyanide (HCN) and water according to this equation: CH4 + NH3 + O2  HCN + H2O You have 8 g of methane and 10 g of ammonia in excess oxygen. Answer the following questions: •

15. ## Chemistry

Why is the DNA information coded in "threes"?

16. ## Math

Find three consecutive odd integers such that the square of the first increased by product of the other two is 224.

17. ## chemistry

Enzymes in the liver catalyze a large number of reactions that degrade ingested toxic chemicals . By what factor is the rate of detoxification reaction changed if a liver enzyme lowers the activation energy of the reaction by 5 kj / mol at 37 celcius ?

18. ## calc

What function should be used to maximize the volume of an open box that has a surface area of 24 and has a square bottom. x is the bottom and h is the height.

2. Methane (CH4), ammonia (NH3), and oxygen (O2) can react to form hydrogen cyanide (HCN) and water according to this equation: CH4 + NH3 + O2  HCN + H2O You have 8 g of methane and 10 g of ammonia in excess oxygen. Answer the following questions: •

20. ## social

based on the results of the studies,what should an elementary school teacher do to ensure that a child with an unusual name develops normal intellectual ability? 1)make a special effort to ignore the child. 2) try to give the child a more acceptable"

Hershey and Chase used the 35S isotope to label proteins. How does this isotope differ from the 32S isotope found in greatest natural abundance, and why did they choose 35S instead of 32S? A)35S has more protons than 32S; Hershey and Chase used it because

22. ## Trigonometry

rectangular form to polar form xy=12 rsinÆŸ rcosÆŸ=12 would the answer be: r^2=12/cosÆŸ sinÆŸ please show steps, Thanks

23. ## social studies

According to the article,which action is suggested as the best way to prevent death and injure from natural disasters? 1)control inflation 2)limit information about natural disasters that occur. 3)put more money into scientific research on natural

24. ## Adv AP Honors Chemistry

2. Methane (CH4), ammonia (NH3), and oxygen (O2) can react to form hydrogen cyanide (HCN) and water according to this equation: CH4 + NH3 + O2  HCN + H2O You have 8 g of methane and 10 g of ammonia in excess oxygen. Answer the following questions: •

2. Methane (CH4), ammonia (NH3), and oxygen (O2) can react to form hydrogen cyanide (HCN) and water according to this equation: CH4 + NH3 + O2  HCN + H2O You have 8 g of methane and 10 g of ammonia in excess oxygen. Answer the following questions: •

26. ## Calculus c

Let f be a twice-differentiable function defined on the interval -1.2 less than or equal to x less than or equal to 3.2 with f(1)=2. The graph of f', the derivative of f, is shown on the right. The graph of f' crosses the x-axis at x=-1 and x=3 and has a

27. ## Calculus

Let f be a twice-differentiable function defined on the interval -1.2 less than or equal to x less than or equal to 3.2 with f(1)=2. The graph of f', the derivative of f, is shown on the right. The graph of f' crosses the x-axis at x=-1 and x=3 and has a

28. ## physics

A pitched ball was hit by a batter at a 30ᵒ angle at a velocity of 40 m/s. The outfield wall, being very short, was just the same height as the swing of the batter’s bat. If the hit was just enough to have been a homerun, how far from the batter was

How would cell division help heal a broken bone? Why do cuts and disappear when in the process of cell division? What is the main purpose for cell division?

30. ## math

the price of a home is 120000 the bank requires a 10% down payment and 2 points at the time of closing the cost of the home is financed with a 30 year 8.5% how much must be paid for the 2 points at closing and how do I figure that amount

31. ## Physics

If a drummer at a gig hits his a drum that has a diameter of .2m with a stick that has a mass of 0.5kg at .03m from the center. What percentage radial region is impacted with a force twice as great as the initial impact force?

32. ## Chemistry

One of the flavouring compounds that have been isolated from aniseed oil is anethole. a.What is the configuration of the molecule, cis or trans? b. The compound will react with bromine. i.What would you observe? ii.Write an equation for the reaction.

33. ## math//algebra

Eye color is determined by genetic combination. Let R represent the gene for brown eyes and l represent the gene for blue eyes. Any gene combination including R results in brown eyes. Consider the offspring of a parent with a homozygous brown-eyed, RR, and

34. ## social

which one of the following conclusions is supported by the results of these studies? 1)characteristics other than one's name have no effect on academic achievement. 2)Unusual names do not determine intellectual development. 3)Ethnic group membership is the

35. ## social studies

which of the following is an example of a natural hazard of the type and magnitude of those referred to in the article? 1)an automobile accident 2) a rain shower 3)a volcanic eruption 4) a falling tree limb 5)a fire in a restaurant please help meeeee

36. ## Last Question Plz helppp:((im soo sleepy!!:(

1)The reaction between solid sodium and iron(III) oxide, Fe2O3(s), is one in a series of reactions that occurs when an automobile air bag inflates. 6Na(s) + Fe2O3(s) -> 3Na2o(s) + 2Fe(s) If 100.0 g of iron(III) oxide are used in this reaction, what mass of

37. ## math

Christina Hercher borrowed \$50,000 on a 90 day, eight percent note. Christina paid \$3,000 toward the note on day 40. On day 60 she paid an additional \$4,000. Using the U.S. Rule, Christina's adjusted balance after the first payment is: (Points : 1)

38. ## Finanical

4. An investor purchases a mutual fund share for \$100. The fund pays dividends of \$3, distributes a capital gain of \$4, and charges a fee of \$2 when the fund is sold one year later for \$105. What is the net rate of return from this investment?

39. ## calc

Find the perimeter of region R which is bounded by y = 1/(x^2+1) and y = -cos(x).

40. ## maths --plse help me..

the cost of 6 cows are same as cost of 8 goats. if cost of 9 cows and twice numbered goats is rs. 9000, then find the cost of 3 cows and 6 goats? (Here , twice numbered goats means 9 * 2 = 18)

41. ## physics

A 23 kg chair initially at rest on a horizontal ﬂoor requires a 371 N horizontal force to set it in motion. Once the chair is in motion, a 345 N horizontal force keeps it moving at a constant velocity. The acceleration of gravity is 9.81 m/s 2 . a) What

42. ## physics

Tracy (of mass 49 kg) and Tom (of mass 65 kg) are standing at rest in the center of the roller rink, facing each other, free to move. Tracy pushes oﬀ Tom with her hands and remains in contact with Tom’s hands, applying a constant force for 0.5 s. Tracy

43. ## math

find an equation in slope-intercept form of the line that has slope 2 and passes through point A(-8,7)

44. ## math

find the parametric equations of the line that passes through the point p(2,3,4)& parallel to the xz-plane

45. ## calc

Assume that a rectangle with sides x and y is expanding with time. Let y = 2x and x(t)=2t+5. What is the rate of change of the area when t=2?

46. ## physics

A student is skateboarding down a ramp that is 6.88 m long and inclined at 16.9 degrees with respect to the horizontal. The initial speed of the skateboarder at the top of the ramp 2.54 m/s. Neglect friction and find the speed at the bottom of the ramp in

1. What is the maximum integer n such that 3^n is a factor of the product of all the odd inegers between 1 and 200?

48. ## Physics

Some neodymiun-glass lasers can provide 100 TW of power in 1.0 ns pulses at a wavelength of 0.26 um. How much energy is contained in a single pulse?

50. ## PreCalc

Why when graphing a regular tan graph, the period is pi but when I graph a sin or cos it has a period of 2pi?

51. ## chemistry

The mass of a sample of boron atoms is 5.60 g. How many boron atoms are in this sample? Show your work here.

52. ## work test

ryan discounts an 80-day note for \$15,000 at 12 percent. the bank discount is: (assume ordinary interest)

53. ## English

Is it: It is what it is; it was what it was. or It is what it is, it was what it was.

54. ## math

one angle of a triangle is 90 degrees.if the ratio of the legs is 1:1,what are the measures [in degrees] of the two remaining angles?  30 and 30 [ 2] 30 and 60 [ 3] 45 and 45 [ 4] 60 and 60  45 and 30

55. ## science

4. Bacillus thuringiensis (Bt) is a bacterium that contains a gene that results in the production of a natural pesticide that kills insects. Genetic engineers have successfully inserted this Bt gene into the DNA of some corn varieties, allowing the corn to

56. ## Math

If one side of a square is increased by 2 inches and an adjacent side is decreased by 2 inches, the area of the resulting rectangle is 32 square inches. Find the length of one side of the square.

57. ## science

a crane lifts a metal beam with a mass of 1350 kg. Calculate the amount of work done against gravity if the beam is lifted 37.5 meters in the air.

58. ## math

sara spent 20.00 of her money on a gift for her mom, than half of her remaining money on a gift for her dad. sara last gift , for her brother, cost her 15.00. she left with 10.00. how much money did she start with?

59. ## sets

let A be a nonempty set such that A *B = A *C show that B = C

60. ## Science

How might a sucker mouth help a tadpole survive in a river ecosystem? A. It helps the tadpole stay in place while feeding. B. It lets the tadpole move quickly through water currents. C. It enables the tadpole to defend itself from its predators. D. It

61. ## algebra 2

find the solution ,show all the step please y=x^3+125

62. ## algebra 2

2x^2-5x-3 show all the step please thanks

63. ## History

16. Which three Founding Fathers were also members of the Declaration of Independence Committee? (4 points)

64. ## Queen Elizabeth 1

Identify at least two actions of the Queen that permitted a diversity of ideas and cultural practices within the empire. Identify any actions that reflected intolerance. thanks in advance

65. ## maths

A building is in the form of a cylinder surmounted by a hemispherical vaylted dome and contains 1144/21 m3 of air. If the internal diameter of the dome is equal to 4/5th of the total height above the floor, find the height of the building

66. ## math

1. Samuel is 2/3 as old as his brother. In five years, he will be 3/4 as old as his brother will be. Find their present ages. a. If x = the brother’s age now, write an expression for Samuel’s present age in terms of x. b. Write an expression for the

67. ## maths --plse help ..sumebudy help me to solve this

On a certain sum, Compound interest is Rs41 and Simple interest is Rs 40. for 2 years. What is the rate p.a.?

68. ## Math Help Please !

The sum of the weights of 8 children is 520 pounds. No two children have the same weight. What is the average(mean) weight of he fourth and fifth heaviest children if the mean and median weights of all children are equal?

69. ## Algebra

Find the complete solution of each equation. Express your answer in degrees. sec^2 θ+sec θ=0 2 cos^2 θ+1=0 cot θ=cot^2 θ sin^2 θ+5 sin θ=0

70. ## Grammar

Is this the right form of "to" in this sentence? I believe an education at XX College would give me the opportunity to hone my abilities and turn them into skills that can be translated to a successful career.

71. ## Algebra 2

Subract. Put the answer in the simplest form 9/x-4 - 5/x+4

72. ## PHISIC

A bouncy rubber ball is dropped from a height of about a metre above the ground .it falls to the ground, bounces and then rises back to almost the height from which it was dropped. Describe the main energy transformations that take place from the point at

74. ## science

How do you slove f=ma when a golfball weighs 45.9g and is going down a 13inch board at 0.5 seconds??

75. ## math

I was wondering if someone could double check my work on a test I'm self correcting. Here's the problem, it has to do with Cramer's Rule. 24x + 6y = 11 24x + 60y = -25 I ended up finding the base determinant (D), and then dividing Dx and Dy by D. My

76. ## Grammar

Am I using "into" properly in this sentence? Enrolling into college with an undecided major... I don't if I should use "to" or "into". Thanks :)

77. ## math

Calculate the monthly finance charge for the following credit card transaction. Assume that it takes 10 days for a payment to be received and recorded and that the month is 30 days long. (Round your answer to the nearest cent.) \$500 balance, 20% rate, \$400

78. ## physics

A load of 46 N attached to a spring that is hanging vertically stretches the spring 0.10 m. What is the spring constant? Answer in units of N/m

79. ## calculus

intergrate 2x-14/4x^2-2x-3

80. ## Physics

Small rockets are used to make tiny adjustments in the speeds of satellites. One such rocket has a thrust of 35 N. If it is fired to change the velocity of a 72100 kg spacecraft by 63 cm/s, how long should it be fired?

81. ## Physics

A 0.201-kg plastic ball moves with a velocity of 0.30 m/s. It collides with a second plastic ball of mass 0.105 kg, which is moving along the same line at a speed of 0.10 m/s. After the collision, both balls continue moving in the same, original direction.

82. ## math

find all real zeros of the function y=-7x+4. a.-4/7 b.-7,4 c. -7 d.4/7 how do you find it?

83. ## Calculus

intergrate 3x-4/x^2-4x+4

84. ## Calculus

integrate x^2+4x+12/(x-2)(x^2+4)

85. ## physics

how to use the values of total energy and potential energy in a graph?

86. ## HISTORY HELP ME

28. Which answer best describes how some enslaved African Americans expressed their emotions? (4 points) They didn’t believe in public emotional displays, so they would often express themselves only to the tribal chief. They participated in sports like

87. ## double square root problem?

Hi I do not how to simplify the problem x^2 =40+12sqrt2 what would be x? BTW if you sqrt both sides it would be double square root so what then? how to simplify?

88. ## music

Which genre of music was influenced by r&b, jazz, and pop? Is it the blues, gospel, or country? My answer is the blues.

89. ## chemistry

The air within a piston equipped with a cylinder absorbs 570J of heat and expands from an initial volume of 0.12L to a final volume of 0.88L against an external pressure of 1.0 atm. What is the change in internal energy of the air within the piston?

90. ## Algebra

Find the complete solution of each equation. Express your answer in degrees. sec^2 θ+sec θ=0 2 cos^2 θ+1=0 cot θ=cot^2 θ sin^2 θ+5 sin θ=0

91. ## MATH

LIST A SET OF 12 NUMBERS THAT HAS THE FOLLOWING: MODE 29, MEDIAN 30, MINIMUM 28 AND MAXIMUM 34.

92. ## Math

Use the LCD to write the equivalent fractions 1/3 and 1/4 7/8 and 2/3

93. ## physics

A 2561-kg van runs into the back of a 823-kg compact car at rest. They move off together at 8.5 m/s. Assuming the friction with the road is negligible, calculate the initial speed of the van.

94. ## chemistry

Lead chloride dissolves in water according to PbCl2(s)↔Pb2++2Cl−(aq) The solubility in pure water has been measured to be 4.44 g⋅L−1. Calculate the solubility product of lead chloride in pure water. Your answer should be in units of molarity raised

95. ## physics

Before a collision, a 24 kg object is moving at +13 m/s. Find the impulse that acted on the object if, after the collision, it moved at the following velocities. (a) +8.0 m/s (b) -8.0 m/s

96. ## health

I am on a shake and when I wasn't on it I wasn't healthy but now when im taking it...It makes me less hungry and dizzy.What should I do?

97. ## maths --plse help me..

A man has Rs 50,000.He invests some part of it in one bank @ of 11 p.c.p.a. and the remaining money in another bank @ of 9 p.c.p.a.He gets a combined simple interest of Rs 5,400(i.e the S.I of one bank + S.I of another bank = 5,400).Then find the amount of

2x^2-4X-3=6

99. ## maths-Linear equation

sita and gita start walking from the same point on the road but in opposite directions.if sita walks at the speed of 5km/h and gita @ a speed of 4km/h,in how much time will they be 27km apart

100. ## maths --plse help me..

if 5/4 times a no. results in the value of the no. increasing by 10 find the no.

101. ## maths --plse help me..

two solids of right cylendrical shape are 49 cm and 35 cm high and thier base diameters are 16 cm,14 cm respectively.Both are melted and moulded into a single cylinder,56cmhigh find its base diameter

102. ## music

does rap and hip-hop always have a background beat?

103. ## Algebra2....

1.) Y=-lx+1l+3 Are these correct? y-intercept=(0,2) x-intercept=(4,0) (-2,0) vertex=(-1,3) domain=all real numbers range: y

105. ## calc -rates

assume a circle is expanding with time where r= t+3. What is the formula for rate of change of an area of the circle with reswpect to time?

106. ## Complex Algaebra, Plz Help!!

Good evening to all around the world. Need help with this question, however i must show my answers supported by the working out. Please help. This question is difficult, the one who solves it for me is my hero!!!! Q11) Two functions f and g are defined by

107. ## Math

A local pizza shop sells large pies for \$7 each. If the cost of the order is proportional to the number of pizzas would they charge a delivery charge per pizza or per order ?

108. ## math... Ms, Sue can you help?

Apparently, I got this question wrong on a test and I'd like to know what error I made... can you help? Here's what I did: 2b^2+b=6 b^2+1/2b=3 b^2+1/2b+(1/2)^2=3+(1/2)^2 (b+1/2)^2=3+1/4 b+1/2=+/- b=-1/2+/-/2 b=(-1+/-)/2 means its in a radical and +/- means

109. ## math

alice finds 12 shells 1/6 are black how many shells are black

110. ## Coordinate Geometry

Please help!!!!! The points A,B,C,D have coordinates (3,3), (8,0), (-1,1), (-6,4) respectively. a) Find the gradients of the lines AB and CD b) Show that ABCD is a parallelogram c) Find the coordinates of the point of intersection of the diagnols AC and

111. ## geometry

Collect magazine or newspaper articles (including graphs) that use directed number quantities and explain in each case how the directed numbers were used.

112. ## geometry

Create a word problem about a real life situation involving perimeter and area of a composite shape. I don't know any real life situations involving perimeter and area of a composite shape. Need Help. Please Help.

113. ## factoring

factor 16x^2-121

114. ## SS8R - help!!!!

What were the various ways in which Progressives reformed society in the following areas: voters' rights: 16th and 17th amendment big business: sherman anit-trust act public works: !?!?!?! woman rights: less corrupt + morally superior education: john deney

115. ## chemistry

A saturated solution of kno3 at 70°c is cooled to 10°c. What mass of a solid of precipitate out of solution.

116. ## algebra

As a diver descends into fresh water we have determined that for every 10 meters of depth the pressure on the diver increases by one atmosphere. Find the equation of the line representing this relationship if we know that when the diver is at a depth of 25

117. ## math

can you make a set of 7 numbers having the following landmarks mode 21 median 24 maximum 35 range 20

118. ## math

Gemma has to complete her chores for the week. She must finish 10 hours of chores to receive her allowance. She can work on landscaping for 2 to 8 hours. She can also do laundry for 4 to 6 hours. Determine the graph that correctly represents this system of

A corporation will pay an annual dividend of \$0.65 one year from now. Analyst expects this dividend to grown 12.9% per year thereafter until the fifth year. After then, growth will level off at 1.9% per year. According to the dividend discount model what

120. ## finanical

2. Open-end Fund A has 165 shares of ATT valued at \$25 each and 50 shares of Toro valued at \$45 each. Close-end Fund B as 75 shares at ATT and 100 shares of Toro. Both funds have 1,000 shares outstanding. (G 17-4) a. What is the NAV of each fund using

121. ## Physics

A crate is sliding down a ramp that is inclined at an angle 37.9 ° above the horizontal. The coefficient of kinetic friction between the crate and the ramp is 0.330. Find the acceleration of the moving crate.

122. ## TO MS.SUE... SCIENCE

who discovered the element gold and when? Ive tried looking it up but a lot of answers are: Known to the Ancients and they give an unknown date of when it was found. Is this correct since im pretty sure gold is very very old. what is your answer?

123. ## ECC

When do parents start to socialize their children in earnest? 1) The 1st year when babies can interact socially. 2) The 2nd year when toddlers are first able to comply with parental directions. 3) The preschool years when children start formal schooling.

124. ## Physics

A Knight of the Round Table ﬁres oﬀ a vat of burning pitch from his catapult at 17 m/s, at 29 ◦ above the horizontal. The acceleration of gravity is 9.8 m/s 2 . How long is it in the air? Answer in units of s

125. ## Calculus

Two particles move along the x -axis. For 0 is less than or equal to t is less than or equal to 6, the position of particle P at time t is given by p(t)=2cos((pi/4)t), while the position of particle R at time t is given by r(t)=t^3 -6t^2 +9t+3. 1. For 0 is

126. ## PERPETUAL HELP

HOW TO GET MOLARITY

127. ## Math

Fred had 2 1/8 yards of pipe. He cuts 1 3/4 yards for a project. What is the LCD for the fractions in the problem?

128. ## Math

If I left \$2700 in a variable rate interest account in 1986, how much is it worth today ?

129. ## math

Find the discriminant of the quadratic equation state solutions 4a^2+7a+4=0

Integrate the following indefinite integral: (sin7x)^12 * (cos7x)^3 Hint: sin^2 + cos^2 = 1

131. ## Economics

\$2700 left in a variable rate interest bearing account in 1986 is worth how much today ?

132. ## Physics

A person, sunbathing on a warm day, is lying horizontally on the deck of a boat. Her mass is 59.6 kg, and the coefficient of static friction between the deck and her is 0.696. Assume that she is moving horizontally, and that the static frictional force is

133. ## SS8R - help!!!

What two acts were created to regulate business?

134. ## Math

\$2700 left in an account paying 4% interest would be worth how much today?

135. ## chemistry

howto the answer arrived anyone explain pls.....

136. ## ALG 2! plz help urgent!!

Karen is 13 years older than Juan. The sum of their ages is 55. How old is Juan? (Be sure to type only Juan’s age in the answer blank. No variables or words.)

137. ## Math

Hi, can you help me please with this: translate the following sentence into equation: Two numbers have a sum of 20, which is the the product of one number and the square of the other is 50. Thanks

138. ## SS8R - help!!!

What is a civil service commission???

139. ## math

a rope was tied to trees at both ends the curve of the rope can be modelled by the equation y=x^2-12x where y is the height and x is the horizontal distance both in feet how far apart are the trees how do you know. show your work

140. ## math

I don't know how to change 1/3 and 2 1/3 into a decimal and still show my work

141. ## Chemistry

I need help drawing these structures. 2-chloro-3-ethylhexanal 2,2-dimethylcyclopentanol 5,5,7-triiodo-trans-3-nonene para-bromomethylbenzene Thanks for the help I'm having hard time with these.

142. ## CALC-LIMITS

F(X)= x-2/(x^2-4) is continuous at x=1 and why as limits approach from 1+ and 1-

143. ## Chemistry

Can someone help me identify the functional groups and what the chiral carbons are? NOTE: THE LAST C HAS A DOUBLE BOND POINTED UPWARDS CONNECTED TO O. SORRY I TRIED MAKING IT AS CLEAN AS I CAN. STARTING FROM LEFT TO RIGHT THE 2ND C HAS A NH3 ATTACHED. THEN

144. ## Chemistry

What are chiral carbons and why do they lead to isomers?

145. ## principal management

8. (TCO8) Briefly explain what is meant by objective and judgmental performance evaluation. Discuss two methods of judgmental evaluation. (Points : 10)

146. ## Math-trig

A stairway runs up the edge of the pyramid. From bottom to top the stairway is 92 m long. The stairway makes an angle of 70° to the base edge, as shown. A line from the middle of one of the base edges to the top of the pyramid makes an angle of elevation

147. ## math

if the time is 6:10. why is the hand closer to the 6.

148. ## English

I have difficulty restating my thesis in a different way in my conclusion. my thesis: Ruby's sense of responsibility becomes her weaknesses as it makes her blind to the fact that her decision to stay with a man that maltreats her is wrong. For this, she

149. ## Math

Iman collects quarters,dimes, nickels, and pennies. This morning he took \$1.80 from his collection . He counted the coins and found that he had twice as many nickels as dimes . What coins iman have?

150. ## Chemistry

Describe how proteins are manufactured in the ribosomes (include discussion of codons and anti-codons).

151. ## CHEMISTRY HELP NOW

A balloon at a pressure of 755 torr and a volume of 5.00 L was allowed to rise in the atmosphere to a point at which the pressure inside and outside the balloon was 697 torr. What was the volume of the balloon at that altitude, assuming the temperature was

152. ## math

If the recipe for 4 pancakes is 6tbsp flour and 1/4 pint milk how much milk and flour would you use for 1/4, 1/2, 2, 5, and 3 pancakes?

153. ## Physics

When a 51.7 gram tennis ball is served, it accelerates from rest to a speed of 41.2 m/s. The impact with the racket gives the ball a constant acceleration over a distance of 49.5 cm. What is the magnitude of the net force acting on the ball in newtons?

154. ## Math

1 7/10 + 3 3/4 in simplest form

155. ## Physics

A student is skateboarding down a ramp that is 5.38 m long and inclined at 19.4 degrees with respect to the horizontal. The initial speed of the skateboarder at the top of the ramp 2.52 m/s. Neglect friction and find the speed at the bottom of the ramp in

156. ## Physics

In the drawing, the weight of the block on the table is 405. N and that of the hanging block is 191. N. Ignore friction, the mass of the rope, and the mass of the pulley. Find the acceleration of the two block system in m/s2.

157. ## math

ja picks a cube from a bag 25 times without looking at it. the results are 20 red and 5 blue. how many of each color would you predict are in the bag?

158. ## Math

2/3 - 3/8 in simplest form

159. ## Chemistry

1) The formation of water is represented by the following equation : 2H2(g) + O2(g) -> 2H2O(g) a.What is the limiting reactant if 4 mol of oxygen reacts with 16 mol of hydrogen? b.What amount (in moles) of water is produced in this reaction? 2) . Sliver

160. ## trig

2sinxcosx+4sin^2xcos^2x=0 solve for x in radians between [0,2pi) (I mean that it is sine squared x and cosine squared x not sine to the power of 2x or cosine to the power of 2x)

161. ## principal management

Discuss how the path-goal theory of leadership and the expectancy theory of motivation are related

162. ## Chemistry

1)The following balanced chemical equation represents the reaction of calcium carbonate CaCO3 (s), with hydrochloric acid : CaCo3(s) + 2HCl (aq) -> CaCl2(aq) + CO2(g) + H2O(l) If 155 g of calcium carbonate reacts with 245 g of hydrochloric acid, what mass

163. ## algebra

joni notices that a 15 ft. flag pole cast a shadow of 25 feet. A tree next to the flag pole cast as shadow of 85 feet. how tall is the tree?

164. ## math

completely factor 256z^2-4-192z^2+3

165. ## Help triangle angles!

Points D, E, and F are the midpoints of sides BC, CA, and AB of ABC, respectively, and CZ is an altitude of the triangle. If

167. ## math

Christina Hercher borrowed \$50,000 on a 90 day, eight percent note. Christina paid \$3,000 toward the note on day 40. On day 60 she paid an additional \$4,000. Using the U.S. Rule, Christina's adjusted balance after the first payment is: (Points : 1)

168. ## math

Christina Hercher borrowed \$50,000 on a 90 day, eight percent note. Christina paid \$3,000 toward the note on day 40. On day 60 she paid an additional \$4,000. Using the U.S. Rule, Christina's adjusted balance after the first payment is: (Points : 1)

169. ## MATHS

Critical help please. Level 3 maths algebraic methods is really hard. Q) Two functions f and g are defined by f:x (arrow) x^2 + 3 g:x (arrow) 2x+1 Find a) the function fg b) solve the equation f(x)=12g^-1(x) I need to show my working out, please help

170. ## Math

On Saturday, Cecelia ran 3 3/7 miles. On Sunday, she ran 4 5/6 miles. How much farther did Cecelia run on Sunday than on Saturday?

171. ## algebra

use factoring and the zero-product property to solve 4a^2-11a+6=0 9r^2-30r+21=-4

A cyclopropane-oxygen mixture is used as an anesthetic. If the partial pressure of cyclopropane in the mixture is 334 mmHg and the partial pressure of the oxygen is 1.02 atm, what is the total pressure of the mixture in torr? ?

173. ## Pre Calculus

find an equation in standard form for the ellipse if the major axis endpoints are (-5,2) and (3,2); the minor axis length is 6.

174. ## Pre- Calc

Determine if the !@#\$%^&tion is a power function. If it is, then state the power and constant of variation. f(x)=4x^(-3/5)

175. ## Math

I have no clue HOW to do this kind of problem, I don't want the answer, I just want an explanation. Here is the question: Carla gets a base salary of \$15,000 per year plus 5% commission on every house that she sells. If she sold \$900,000 in homes last

176. ## homework

what anumeral 3/4

177. ## algebra 1

It certainly pays to check your work! I just took a huge science test. I checked it over twice before I turned it in, and I got an A! My score was 94 out of 100! I figure that each time I checked it, I found half of the mistakes that were there at a time.

178. ## Custer's Last Stand

I have only been around for two research days for this big project on Custer's Last Stand, and I have some information and a LOT of books, but I need quick, straightforward info that I can work around. Any solid information you know pertaining to details

179. ## Chemistry

What preperation produces a 2.0 Mole solution of C6H12O6? a) 90.0 grams of C6H12O6 dissolved in 500.0 mL of solution b) 180.0 grams of C6H12O6 dissolved in 1000mL of solution c) 90 Grams of C6H12O6 dissolved in 1000mL of solution D) 180.0 Grams of C6H12O6

How do you explain how the product of 16 times 34 is like the product of 6 times 34 plus 10 times 34

181. ## chemistry

When 0.558g of biphenyl (C_12H_10) undergoes combustion in a bomb calorimeter, the temperature rises from 25.7^\circ C to 30.1^\circ C. Find DeltaE_rxn for the combustion of biphenyl in kJ/mol biphenyl. The heat capacity of the bomb calorimeter, determined

182. ## Algaebra

Two functions f and g are defined by f:x = x^2 + 3 g:x = 2x+1 Find the function fg Please help and show all working out,i got the answer for it but i really don't understand it!!! Thank You

183. ## Math

Henry went to two different music stores to buy some new CDs. At Store A he bought 5 CDs for \$70. At Store B he bought 6 CDs for \$78. Which store had the best price for a CD and by how much?

184. ## math word problems

Susie's cat had kittens. 4 of them were female, 3 of them were black. If 1/2 the litter had short tails, what is the maximum number possible for short tailed black females.

185. ## math

A class of students do 1 of 4 different after school activities. 1/2 play soccer, 7 take karate, 9 do art or piano. How many students are in the class.

186. ## Algaebra

Two functions f and g are defined by f:x = 25 /(3x-2) g:x = x^2 Find the composite function Please show all calculations, thank you!

187. ## berta jrhs

The sum of my digit is 0. My digt are not the same.i am an odd number.one of my digit is a multiple of 3,the other is not. I am greater than 50.the difference between my digit is less than 5. What am i?

188. ## calc

find f(X)=(sin x)*1/2

189. ## World history

12. The Delhi Sultanate ruler Radiyya first took power chiefly because A. she proved herself in battle. B. she wore men's clothes. C. she killed her brother. D. her father chose her as his successor. I chose c

190. ## Physics

a ship is heading due north at 7.50 m/s relative to the water. The local current is 1.52 m/s in a direction 42 degree west of north. Find its velocity relative to earth( find both direction and magnitude of the velocity)

191. ## trig

simplify (1-sec^2(è)/(tan^2(è)

192. ## calc

Find the volume of a solid formed by region R which is bounded by y = 1/(x^2+1) and y = -cos(x) and rotated about the line y = 3.

193. ## CHEMISTRY

FOR MOST LABS THAT WE PERFORM , THE MEASURED WALUES ARE ALWAYS COMPARED TO THE ACCEPTED VALUES USUALLY IN THE FORM OF PERCANT ERROR . WHY IS THIS DONE?

194. ## PHYSICS

During a play, a tennis player hits the ball when its velocity is 20 m/s towards him. The racquet exerts a force of 540N on the ball for 6.90 ms, giving its returning velocity of 42 m/s. Find the mass of the ball

195. ## Calculus

Two particles move along the x -axis. For 0 is less than or equal to t is less than or equal to 6, the position of particle P at time t is given by p(t)=2cos((pi/4)t), while the position of particle R at time t is given by r(t)=t^3 -6t^2 +9t+3. 1. For 0 is

196. ## math - stats

It is believed that at least 60% of voters from a certain region in Canada favor the free trade agreement (FTA). A recent poll indicated that out of 400 randomly selected individuals, 250 favored the FTA. If we wished to perform a test to determine whether

197. ## calc

Find the volume of a solid formed by region R which is bounded by y = 1/(x^2+1) and y = -cos(x) and rotated about the line y = -2.

198. ## physics

A ferry boat is 6.2m wide and 7.1 m long. When a truck pulls onto it, the boat sinks 6.02 cm in the water. What us the weight of the truck? The acceleration of gravity is 9.81 m/s2. Answer in units of N

199. ## Stoichometry

Solutions of sodium carbonate and silver nitrate react to form solid silver carbonate and a solution of sodium nitrate. A solution containing 0.55 mole of sodium carbonate is mixed with one containing 0.55 mole of silver nitrate. After the reaction is

200. ## calc volume

find the volume of a solid formed when the region bounded by y = e^(x-3) and y = 1 + ln(x) is rotated about the y-axis.

201. ## Algebra

In 1915, the tallest flagpole in the world was in San Francisco. a. When the angle of elevation of the sun was 55 degrees, the length of the shadow cast by this flagpole was 210 ft. Find the height of the flagpole to the nearest foot. b. What was the

I need help understanding equivalent trigonometric functions! Can someone PLEASE help me because the test is tommorrow and the internet or my textbook isn't helping at all!

203. ## calc arc length

Find the length of the arc along f(x) = integral from 0 to x^3 sqrt(cos t) dt on the set of x [0, pi/3].

204. ## Calculus

The region in the first quadrant enclosed by the graphs of y = x and y = 2sin(x) is revolved about the x-axis. The volume of this solid is: (a) 1.895 (b) 2.216 (c) 5.811 (d) 6.678 (e) 13.355

205. ## English - Ms. Sue help

help I don't understand. 1. When you are “egging someone on,” you are (1 point) offering that person a snack. urging that person to take action. embarrassing that person. 2. One good reading technique is to make up questions for yourself to answer

206. ## Calculus BC

Let the region bounded by x^2 + y^2 = 9 be the base of a solid. Find the volume if cross sections taken perpendicular to the base are isosceles right triangles. (a) 30 (b) 32 (c) 34 (d) 36 (e) 38

207. ## ap calculus

Which of the following definite integrals gives the length of y = e^(e^x) between x=0 and x=1? All the answers are preceded by the integral sign from 0 to 1. (a) sqrt[1 + e^(2*(x+e^x))] dx (b) sqrt[1 + e^(4x)] dx (c) sqrt[1 + e^(x+e^x)] dx (d) sqrt[1 +

208. ## Algebra

Two functions f and g are defined by f:x = 25 /(3x-2) g:x = x^2 Find the composite function

209. ## Algebra

Two functions f and g are defined by f:x = x^2 + 3 g:x = 2x+1 Find the function fg

210. ## math

vickie earns \$20,000 a year as a bookkeeper.if she receive a raise of 2%,how could her new total salary be represented? 1] 0.02[\$ 20,000] 2] \$20.000/0.02 3] 0.02[\$ 20,000] + 0.02 4] 0.02[\$ 20,000]+ \$20,000 5] \$20,000-0.02 + \$20,000

211. ## Science

2. A gamete cell is produced through which process? A.osmosis B.mitosis C.meiosis D.respiration

212. ## math

if a house square feet is 3,546 sq what is the perimeter of the house

213. ## Science

Some strains of laboratory mice have been inbred for many generations, resulting in large numbers of mice with nearly identical genetic makeup. Explain an advantage of using these mice in designing an experiment to test the effects of a new drug. Compare

214. ## maths

What length of a solid cylinder 2cm in diameter must be taken to recast into hollow cylinder of length 16cm,external diameter 2cm and thickness 2.5mm?

215. ## Science

6. Owls are nocturnal hunters and depend on their acute vision for survival. If an owl with cataracts is determined to be inherited and she is released back into her natural habitat, she could pass the allele for cataracts on to her offspring. What process

216. ## Science

7. The mutation for cataracts (c) occurs on a gene represented by the letter E. Owls that are homozygous for the mutation (EcEc) exhibit cataracts. Owls that are homozygous for normal eyes are EE and owls that are carriers of the mutation but do not

217. ## Science

8. All cataracts were originally thought to be acquired; however, recent research indicates that some cataracts are genetic in nature. What type of study would be most likely to lend support to the claim that cataracts can be inherited? A. analysis of

218. ## maths

A rectangular reservoir is 120m long,and 75cm wide .at what speed per hour must water flow into it through a square pipe of 20cm wide so that the water rises by2.4m in 18hrs.

219. ## Science

9. Prior to herbicide application, a student notes that there are two related species of weeds (A and B) that occur in similar numbers in plot 5. Species A reproduces sexually and species B reproduces asexually. After exposing both weed populations to

4. Given the chemical formulas of the following compounds, name each compound and state the rules you used to determine each name. • RbF • CuO • (NH4)2C2O4 (Note: C2O4– is called oxalate.)

221. ## Science

10. A single weed in plot 6 has a genetic mutation that allows its cells to transport herbicide out through the cell membrane before the weed is harmed. Suppose a student allows weeds to grow in plot 6 and then periodically treats them with herbicide.

222. ## physics

A spring has a force constant of 70000 N/m. How far must it be stretched for its potential energy to be 21 J?

223. ## Help!!!!!!!!!

Calculate Triangle G°, free energy change, that occurs when 12g of Shila react with excess And at 298k according to the following reaction: N2(g)+3H2(g)2NH3(g) Triangle G°=-34KJ/mole

224. ## algebra

2.7q - 2.3 -2.6q = -0.9q -1.6

225. ## algebra

A ball is thrown(from 0') straight up at 50' per second, how long before it hits the ground? How high does it go?

226. ## Math word

a 5 digit telephone number is made up of three 1's and two 5's. How many extension numbers of this type can be formed

227. ## World History-HELP!!!!!!!!!!!!!!!!!!!

what are 2 actions of Queen Elizabeth 1 that benefited or protected the people? Identify any actions that endangered or compromised the well-being of the people.

228. ## Calculus

A particle moves along the x-axis with the velocity given by v(t)=3t/(1+t^2) for t >or equal to 0. When t=0, the particle is at the point (4,0). 1. Determine the maximum velocity for the particle. Justify your answer. 2. Determine the position of the

229. ## Science

What are the four ocean zones of a marine ecosystem, from most shallow to deepest?

230. ## stats

A soccer team is likely to score a goal at any time during a game. What is the probability it scores during the first half? Use the slash ( / ) symbol to represent fractions and be sure to reduce fractions to their lowest terms.

231. ## algebra

Find the amount of compound interest earned in an account that opens with \$24,000, earns 7.7% interest compounded daily, and is held for 15 years. Assume 360 days in a year.

232. ## HISTORY URGENT

2. Read the passage and answer the following question: Within a few hours after bidding good-by to General Washington, Captain Hale, taking with him one of his own trusty soldiers, left the camp at Harlem, intending at the first opportunity to cross Long