# Questions Asked onFebruary 18, 2013

1. ## chemistry

Preceed the equation of CuSO4 + Fe

2. ## math

volume of water delivered using a buret has a mass of 2.67 g. What was the final volume reading on the buret if the inital volume reading was 0.10 ml? [assume the density of water is 1.00g/mL]

3. ## math

"The area of a rectangle is 360m2. If its lengh if increased by 10m and its width is decreased by 6m, then its area does not change. Find the perimeter of the original rectangle." I need to use the "guess and test" or the "draw a diagram" method to solve;

4. ## physics

The recovery time of a hot water heater is the time required to heat all the water in the unit to the desired temperature. Suppose that a 62-gal (1.00 gal = 3.79 x 10-3 m3) unit starts with cold water at 11 °C and delivers hot water at 53 °C. The unit is

5. ## geometry!

ABC is an isosceles triangle with AB=AC, ∠BAC=96∘. D is a point such that ∠DCA=48∘, AD=BC and angle DAC is obtuse. What is the measure (in degrees) of ∠DAC?

6. ## Chemistry

2 SO2 (g)+O2 (g)→2 SO3­↑ How many grams of SO3(g) are formed if 8.45 grams of oxygen are used?

7. ## Physics help!!

A tire 0.500 m in radius at a constant rate of 200 rev/min.Find the speed and acceleration of a small stone lodged in the tread of the tire( on its outer edge).

8. ## chemestry

what is limiting reagent ?

asked by shashi ranjan
9. ## Physics help!!

An archer shoots an arrow with a velocity of 45 m/s at an angle of 50 degrees with the horizontal.An assistant standing on the level ground 150m downrange from the launch point throws an apple straight up with the minimum intial speed necessary to meet the

10. ## geometry!!!

What is the largest triangle number that is less than 1000?

11. ## chemistry

AMU ?

asked by shashi ranjan
12. ## geometry!

ABCDE is a regular pentagon. On the outside of AB, we construct a square ABFG. What is the measure (in degrees) of ∠EAG?

13. ## physics!

Recently, a meteor impacted Russia. The estimate of the meteor's size was 10 tons and it was estimated to have entered the earth's atmosphere at a speed of 14,600 m/s. What was the total kinetic energy of such a meteor in J as it entered the atmosphere?

14. ## algebra.....

N is a 3-digit number that is a perfect square. When the first digit is increased by 1, the second digit is increased by 2, the third digit is increased by 3, the result is still a perfect square. Determine N.

15. ## algebra!!

How many ordered pairs of integers (a,b) are there such that 1/a+1/b=1/200?

16. ## Algebra

I need to find the volume of a cylinder. Use 3.14 for pi...I think the answer is 24,501.42 m^2...the picture shown is a cylinder with a diameter of 34m and a heigth of 27m I know how to work these problems out and I got 24,501.42m^2 but the computer is

17. ## physics

Collision of charged particles}} A proton moves in vacuum and enters a region where there's another proton at rest. The protons interact and the angle between their velocities is measured when they are far away from each other. What is the most likely

18. ## Algebra

What is a solid with the description as a figure that has one base that is a rectangle and four lateral surfaces that are triangles. A. triangular pyramid B. cone C. rectangular prism D. rectangular pyramid my answer is D..?

19. ## maths

terrorists are trying to take over the world. They know the password to the weapon is 5 digits long and contains either 0 or 1, and either 2 or 3, and either 4 or 5, and either 6 or 7, and either 8 or 9. If the robots can enter 5 passwords per second, how

20. ## math

A two digit number has the property that the units digit is 4 less than the tens digit and the tens digit is twice the units digit. What is the number?

21. ## Cognitive psychology

What was the varible for Mozart experiment?

22. ## SOCIOLOGY

WHAT ARE THE THIRTY ASSUMPTION OF EVIRONMENTAL CRIMINOLOGY ONE CAN OBSERVE IN THIS FIELD OF STUDY

23. ## Algebra

Multiply 5a^3+4a^2 8b^6-6ab^6 _________ * __________ 6ab-8b 5a^2+4a

24. ## Algebra

Multiply 16-n^2 n^2-7n-30 _________ __________ n^2-5n-36 * n^2-n-12

25. ## Trigonometry

Verify the identities algebraically. 1.) TAN^5 X= TAN³X SEC²X-TAN³X 2.) COS³X SIN²X= (SIN²X-SIN^4X)COS X

26. ## Algebra

Divide x^3y^2 xy^5 __________ / _________ x^2-3x-18 x^2-x-30

27. ## accounting

What is manufacturing overhead and how is it useful? How do you calculate applied manufacturing overhead?

28. ## Chemistry

I have a cyclohexane with a 3 carbon chain coming off of it. and two methyl groups on the second carbon. what is it called :/

29. ## Algebra

Correct the right hand side of the following expressions. (a) 5 x 5+x _ + _ = ____ 2 6 2+6 (b) 6x + 5 _______= x+5 6 (c) 1 1 1 _ +_ = ___ y c y+c

The arch is made up of equilateral triangular sections with double walls of steel 3 feet apart. Space between the walls is filled with reinforced concrete. Sizes of the sections vary, but a section at the bottom of the Arch has 54-foot sides and is 12 feet

31. ## Math

Given 5 members, 5 scientists and 9 mathematicians. How many committees can be formed if ..... a. all are scientists? b. exactly 3 mathematicians? c. 2 scientists are not allowed to be in the committee? d. 1 of the scientists and 1 of the mathematicians

32. ## Chemistry

In a given 1st order reaction A ---> products, the initial concentration of A is 0.40 M. What will be the concentration of A after 15 seconds if the half-life of the reaction is 3 seconds? I found the concentration to be 1.25 x 10-2 M But then how do I

33. ## maths

express 0.375% in its simplest form

34. ## maths

find gain or loss% if c.p =rs565 and s.p =rs500

35. ## maths

find the mean of first 5 even numbers

36. ## maths-urgently needed

A number of 4 different digits is formed by using 1, 2, 3, 4, 5, 6, 7. Find the probability that it is divisible by 5. Digits can be repeated

37. ## maths-urgently needed(probability)

A bag contains 5 red, 4 blue and an unknown number of m green balls. Two balls are drawn. If probability of both being green is 1/7 find m.

38. ## physics

An airplane starts at rest and accelerates down the runway for 20s. At he end of the runway, it's velocity is 80 m/a north. What is its acceleration?

39. ## Chemistry

how can you prepare 300ml of 15% h2so4 solution

40. ## math

jennifer paid \$38.40 for a sweater after receivng a 40% discount. what was the original price?

41. ## math

a tailor had 9m of cloth. after making a tablecloth and 4 cushion covers, she had 90 cm of cloth left. if she used twice as much coth to make each cushion cover as the tablecloth, find the lenght of cloth she used to make each cushion cover

42. ## math

a person deposits five hundred dollars in a savings account that pays 5% annual interest that is compounded yearly. At the end of ten years, how much money will be in the savings account?

43. ## Euclid's Geometry , geometric constructions

Find the area of the triangle whose vertices (on cartesian graphs) are (-1,5) , (-2,-3) & (10,1)

44. ## maths

For the following graph: a. Find the domain of f. b. Find the range of f. c. Find the x-intercepts. d. Find the y-intercept. e. Find the intervals over which f is increasing. f. Find the intervals over which f is decreasing. g. Find the intervals over

45. ## English

choices...curtail,devastate,digress,incentive,incorporate,indispensable,intermittent,rigor,squander,succumb here is the sentences: 1,2:Duane feels he ____(e)d too many years in inactivity, so now he welcomes the _______s of an exercise program. 3,4. The

46. ## Physics

A 67.8 kg man sits in a 6.3 kg chair so that his weight is evenly distributed on the legs of the chair. Assume that each leg makes contact with the floor over a circular area with a radius of 2.4 cm. What is the pressure exerted on the floor by each leg?

asked by Mackenzie Tucker
47. ## maths

Find the general solution of sin x + sin 2x + sin 3x + sin 4x = 0 ?

48. ## Math

A rectengular area is to be enclosed on three sides by fencing, an existing hedge forming the fourth side. Find the greatest area of the rectangle and its dimensions if 140mof fencing is available.

49. ## Physics

An airplane originally at rest on a runway accelerates uniformly at 6.2 m/s2 for 12 sec. During this 12 sec-interval the air plane travels an approximate distance of?

50. ## physics

A baseball pitcher throws a fastball at 51.6 m/s. If the batter is 18 m from the pitcher, approximately how much time does it take for the ball to reach the batter?

51. ## Physics !

Paul pulls a stalled car with a rope 493-m with a force of 267-N, calculate the powered generated by Paul after 9 minutes pulling it down the road.

52. ## math, trigonometric functions

a seesaw consists of a plank 4.5m long which is supported by a pivot at its center and moves in a vertical plane above the pivot. if the height of the pivot pillar above the ground is 1m, through what maximum angle can the seesaw beam move?

asked by audrey anne
53. ## Algebra

Can you please give me some real life examples of using variables and solving equations. These are 6th grade students and I need to show real-life experiences. Thanks!

54. ## Chemistry

What is gaseous state?

asked by Ajay pratap
55. ## Chemistry

Define a.m.u?

asked by Ajay pratap
56. ## english

please correct this sentence if there is any mistake. He told him that rain is not yet abated.If it comes down I will come to your house.

asked by ramesh reddy
57. ## math

girl 5 feet case a shadow of 61/2 ft at the same time a statue shadow 12 feet how tall is the statue

58. ## Calculus

y = 4 x^3 + 6/3 x Enter the derivative: y'=???

59. ## english

I have to do a literary research paper. I would like to do it on the story on Cinderella or Snow White and the 7 dwarfs. Is that possible? Can you help?

60. ## College Algebra

You have 800 feet of fencing to enclose a rectangular plot that borders on a river. If you do not fence the side along the river,find the length and width of the plot that will maximize the area. What is the largest area that can be enclosed?

61. ## Physic Help

Charge is uniformly distributed along the x axis with density ß. Use Gauss' Law to find the electric field it produces, and use this to calculate the work done on a charge Q that moves along the y axis from y = a to y = b.

62. ## Physic Help

Charge is distributed through an infinitely long cylinder of radius R in such a way that the charge density is proportional to the distance from the central axis: ß = A r, where A is a constant and ß is the density. (a) Calculate the total charge

63. ## College Algebra

Pinocchio has a problem with lying. Everytime he lies, his nose grows. The size of his nose grows inversely to the square of the lying index(less truth is a statement). If his nose grows to 3 inches with a lying index of 2, what will be the lying index if

64. ## Physics

When point charges q1 = +3.1 ìC and q2 = +5.1 ìC are brought near each other, each experiences a repulsive force of magnitude 0.54 N. Determine the distance between the charges.

65. ## math

i am trying find out how you would find the height of a rectangular prism if the surface area is 100 and length is 10 and width is 6. if someone can get me started on the right way it would help ?

66. ## math

q = 350 − 5p (a) Enter the equation for revenue R as a function of price p. R = (b) What is the (instantaneous) rate of change of revenue with respect to price when the price is \$6? (c) At what price is the derivative of revenue with respect to price

67. ## english

We have to rewrite this correcting fragments and run on sentences can someone check my work below the original. Scientists report (1) that creatures living in the deep sea are in danger of starving to death. Millions of undiscovered species live, in the

68. ## Finance 100

The following information is available to you: travelers' checks = \$1 million; coin and paper currency = \$30 million; repurchase agreements and Eurodollars = \$15 million; demand deposits = \$25 million; retail money market mutual funds = \$60 million;

69. ## Ap calc

Consider the function h(x) = a(-2x+1)^5-b, where a doesn't equal 0 and b doesn't equal 0 are constants. A. Find h'(x) and h"(x) B. show that h is monotonic ( that is, that either h always increases or remains constant or h always decreases or remains

70. ## English

Is there a present and past tense of "is" and "are" ? Or it is just how they're used in the sentence that make them past/present tense? Thanks

71. ## LINEAR EQUATION

A is half as old as B who is three times as old as C. how old is A

72. ## physics science

a 750kg motor car is moving at a constant force of 27m/s on a staight horizontal road. The frictional force expirience by the motor car travelling on the road is 680N. Calculate the power delivered by the motoq car

73. ## physics science

a 750kg motor car is moving at a constant force of 27m/s on a staight horizontal road. The frictional force expirience by the motor car travelling on the road is 680N. Calculate the power delivered by the motoq car

74. ## Chemistry

How many grams of oxygen are collected in a reaction where 247 mL of oxygen gas is collected over water at a temperature of 25°C and a total pressure of 697 torr?

75. ## Chemistry

It takes 200. seconds for a sample of carbon dioxide to effuse through a porous plug and 280. seconds for the same volume of an unknown gas to effuse under the same conditions. What is the molar mass of the unknown gas? Enter your answer to 3 significant

76. ## Microsoft excel unit

Determine the present value of a pension plan that will pay you 20 yearly payments of \$7,000 each;the current rate of return in 7.5%

77. ## algebra

a physical education teacher was getting ready for gym class one day . he measured the circumference of the basketball to be 9 inches when it is filled with air . he then went on to pose the following question to his classes : use 3.14 A ) how much

78. ## english

I need help on doing a literary research paper.

The surface area of a right circular cylinder is 1200 cm^2 . If the height of the cylinder is twice its diameter, find the dimensionsof the cylinder. I know th formula for SA is SA = 2pir^2 + 2pirh I know h = 2d. I know r = 1/2 d What is h in relations to

80. ## Chemistry

How many grams of oxygen are collected in a reaction where 247 mL of oxygen gas is collected over water at a temperature of 25°C and a total pressure of 697 torr? And would i just convert 697 torr into atm and use that for pressure? And how do i find the

81. ## Maths-can someone explain something to me???

hey, can someone explain vectors to me? im soooooo lost, I don't understand them at ALL. please please please help me. :(

82. ## Chemistry

A solution has a hydroxide-ion concentration of 7.48X10-5 M. What is it's hydronium-ion centration? I have no idea where to begin on this question...

83. ## maths

If I walk at 5 km/hour; I miss a train by 7 minutes. If however, I walk at 6 km/hour I reach the station 5 minutes before the departure of the train. Then the distance between my house and the station is

84. ## english

How do you diagram this sentence: Driving to the mall, Ann stopped on the way to visit her girlfriend.

85. ## Physics

The drawing shows six point charges arranged in a rectangle. The value of q is 9.27 µC, and the distance d is 0.17 m. Find the total electric potential at location P, which is at the center of the rectangle.

While rummaging in his great aunt's attic, Bernard found a small figurine that he believed to be made out of silver. To test his guess, he looked up the denisty of silver in his chemistry book and found it to be 10.5 g/cm^3. He found that the figure had a

1cm^2 ----

88. ## Basketball Current Event

Dear Tutor, I have to do a current event for Physical Education on basketball. My problem is that I don't know anything about basketball and my coach wants it to be on a famous basketball team that has recently played. Can you help me find an article. I am

89. ## College Algebra

A company builds bicycles. Their fixed cost is 300,000 and it costs \$500 to make each bicycle(labor,materials,etc.) A)What is the cost equation and what is the average cost per bicycle? B)If the revenue equation is -3x^2+3200x where x is the number of

90. ## Physics

The electric field between the plates of a paper-separated capacitor is 8.18×104 . The plates are 2.20 apart, and the charge on each plate is 0.795 .Determine the capacitance of this capacitor. Determine the area of each plate.

91. ## Math (PreAlgebra) 8thG

Find the volume of a sphere with a radius of 10 feet. Round to the nearest whole number. V = (4/3)3.14(r)^3 = (formula) I don't know what to do about the fraction, four over three (4/3), in the formula.... Show me how to do this please?

92. ## algebra

Monique and Jackie start at the same spot and run in the same direction around a quarter mile track. Monique runs at a speed of 14mph, Jackie runs at a speed of 16mph . how long will it take for Jackie to laps monique? (Jackie runs 1 more lap than

93. ## algebra

mark needs to make 15% sulfuric acid for a lab. how much sulfuric acid, and how much water does he need to use to make ^ liters of 15 % of sulfuric acid ?

94. ## Help Please Edu

The major purpose of an interdisciplinary team is to: a.take turns caring for a child with special needs b.determine the best ways to help a child with special needs learn. c.determine how to discipline a child with special needs d.write reports about the

95. ## chemistry

I. 1) Calculate the pH of the following solution: 0.1 M HF + 0.2 M NaCN Given: pKa for: HF/F- = 3.2 HCN/CN-= 9.4 2) Calculate the pH of the solution that results upon mixing 20.0 mL of 0.2000 M HCI with 25.0 mL of: a) distilled water c) 0.13 MNaOH e) 0.23

96. ## Math

When 18 is subtracted from four times a certain number, the result is 5/2 the original number. What is the number?

97. ## Math

1+n/16=2 How would you solve this problem? Thank you in advance :)

98. ## math

28x to the 5 power w to the 2 power and 13v x w to the 3 power

99. ## Physics

Two particles each have a mass of 5.5 10-3 kg. One has a charge of +4.8 10-6 C, and the other has a charge of -4.8 10-6 C. They are initially held at rest at a distance of 0.88 m apart. Both are then released and accelerate toward each other. How fast is

100. ## physics

An equipotential surface that surrounds a point charge q has a potential of 590 V and an area of 1.20 m2. Determine q.

101. ## AP English 11

I have to write a paper for english, i keep getting bad grades and i use the paper rater sight always to make sure i do my best. it shows i get a 95 and my teacher gives me 30-20 points less and i don't under stand what im doing wrong. i need help on my

102. ## finance

Texas Wildcatters Inc. (TWI) is in the business of finding and developing oil properties, and then selling the successful ones to major oil refining companies. TWI is now considering a new potential field, and its geologists have developed the following

103. ## Basketball Current Event

Dear Tutor, I have to do a current event for Physical Education on basketball. My problem is that I don't know anything about basketball and my coach wants it to be on a famous basketball team that has recently played. Can you help me find an article. I am

104. ## geometry

why do rectangles not exist in hyperbolic geometry

105. ## Education

Bennett’s Developmental Model of Intercultural Sensitivity (DMIS) provides a continuum from A) individual to social development. B) individual to social development. C) insensitive to sensitive development. D) None of the answers are correct. I believe

106. ## Chemistry

At 20.0 degrees celcius, a student collects H2 gas in a gas collecting tube. The barometric pressure is 755.2mm Hg and the water levels inside and outside the tube are exactly equal. What is the total gas pressure in the gas collecting tube?

107. ## Chemistry

Carbon dioxide dissolves in water to form carbonic acid, which is primarily dissolved CO2. Dissolved CO2 satisfies the equilibrium equation: CO2 (g) CO2 (aq) K=0.032 The acid dissociation constants listed in most standard reference texts for carbonic acid

108. ## Physics

The electric potential energy stored in the capacitor of a defibrillator is 77 J, and the capacitance is 123 µF. What is the potential difference that exists across the capacitor plates?

109. ## Science-Physics

20 (part 1 of 2) The initial speed of a body is 6.61 m/s. What is its speed after 3.92 s if it accelerates uniformly at 3.46 m/s/s? Answer in units of m/s 21 (part 2 of 2) 10.0 points What is its speed after 3.92 s if it accelerates uniformly at −3.46

110. ## grade 9 english

questions for short story Stones by sandra birdsell. 1) in two sentences retell the story. 2a) Compare the descriptions of the two woman's laughter in paragraph three. Explain how the similes capture the personalities of each of these characters. 2b)

111. ## world history

In response to the formation of NATO,the Soviet Union created the...?

112. ## Physics

A plane is flying 25 degrees north of west at 190 km/h and encounters a wind from 15 degrees north of east at 45 km/h. What is the planes new velocity with respect to the ground in standard position?

113. ## math

5670 is invested at a anual intrest rate 3.5% for one year. if the intrest is compounded semiannually then the polynomial P(1+r/2)^2 represent the value of the investment after one year

114. ## Statistics

In order to compare two kinds of feed, thirteen pigs are split into two groups, and each group received one feed. The following are the gains in weight (kilograms) after a fixed period of time: Feed A: 8.0 7.4 5.8 6.2 8.8 9.5 Feed B: 12.0 18.2 8.0 9.6 8.2

A piece of iron weighs 45 oz and has a volume of 10 in^3. Determine the density of iron in g/cm^3.

116. ## social studies project

what does tourist bureau mean

117. ## chemistry

Greg reacts 5.0 moles of hydrochloric acid(HCL)with 1.5 moles of barium hydroxide(Ba(OH)2).Which reagent is the limiting reagent, and which is in excess?If the reagent runs to completion,how many moles of barium chloride(BaCl2)will be produced? CAN SOMEONE

118. ## chemistry

Calculate the mass of sliver chloride, AgCl, and dihydrogen monosulfide, H2S, formed when 85.6g of sliver sulfide, Ag2S, reacts with excess hydrochloric acid, HcL.

119. ## Math

Graph the line with slope 2 passing through the point (-5,4)

120. ## Inter. Reading

Are the answers below correct: My aunt has only rigor success in quitting smoking. Every few months she succumb to temptation, and then she has to quit all over again. Choose from: Intermittent,Succumb and rigor.

121. ## psychology

Particular factors encourage people to be drawn into liking one another. In this context, the reciprocity of liking effect is primarily associated with A. physical attractiveness. B. propinquity. C. similarity. D. exposure.

122. ## chemistry

N2(g)+3H2(g)2NH3(g) +▲H if uou are preparing NH3, hiw does the following increase the yield of NH3? (a) ▲[N2] ▲[H2] (b) ▲T of the chamber storing NH3 (c) ▲P of the system (d) ▲[NH3(g)] * equilibrium * ▲ change

123. ## PHYSICS

This is the same question as last time. "A plane is flying 25 degrees north of west at 190 km/h and encounters a wind from 15 degrees north of east at 45 km/h. What is the planes new velocity with respect to the ground in standard position?" Elena kindly

asked by Matt, AGAIN
124. ## Applied Calculus

Find the derivative of the function: (x^(3)-8)/(x^(2)+9)

125. ## chemistry

N2(g)+3H2(g)2NH3(g) +▲H if uou are preparing NH3, hiw does the following increase the yield of NH3? (a) ▲[N2] ▲[H2] (b) ▲T of the chamber storing NH3 (c) ▲P of the system (d) ▲[NH3(g)] * equilibrium * ▲ change

126. ## Earth Science

Give an example of an organic non-clastic sedimentary rock, a chemical non-clastic sedimentary rock, and a clastic sedimentary rock. Can anyone provide me with those examples, please?

127. ## College Algebra

Find the average rate of change for function f(x)=3x^(2)-5 at the points x=6 and x=10

128. ## Life orientation

What according to the basic conditions of employment act applies with regard to the contraventions

129. ## Algebar 2

Does the series 1/4 - 1/2 +1 - 2 + converge or diverge. If it converges find the sum

130. ## math

1:how do you order 3/4 , 7/8 ,and 13/6 from least to greatest. 2:how do you convert 2 2/4 ito an improper fractin. 3:how do you convert 3% into a decimal and how do you convert 4.56 into a percent ... i am in 6th grade by the way and make sure you provide

131. ## Chemistry

How many cubic decimeters of oxygen are needed to react with sulfur to produce 5.00 * 103 cubic decimeters of sulfur dioxide?

132. ## chemistry

If 22.4 dm3 of steam react with MgO, calculate the mass of the product that will form.

133. ## Language Arts Help!!!!!

Identify two regular and two irregular polygons in your home or community. How do you know they are regular or irregular? Do you think regular or irregular polygons are used more frequently in the design of objects and buildings in the world? Explain.

134. ## Finite Math

Determine which is the better investment. 6.8% compounded semiannually or 6.6% compounded quarterly?

135. ## Statistics

Suppose a data set has a linear regression line of y = 6 -0.8x. If the mean of the x's is 5, what is the mean of the y's? 2 5 10 6 None of the above

136. ## Algebra 2

What are the first 6 terms of the sequence with the explicit formula an=-3n2+4?

137. ## chemistry

N2(g)+3H2(g)2NH3(g) +▲H if uou are preparing NH3, hiw does the following increase the yield of NH3? (a) ▲[N2] ▲[H2] (b) ▲T of the chamber storing NH3 (c) ▲P of the system (d) ▲[NH3(g)] * equilibrium * ▲ change

138. ## statistics

Sugar packaged by a certain machine has a mean weight of 5 lb and a standard deviation of 0.04 lb. For what values of c can the manufacturer of the machinery claim that the sugar packaged by this machine has a weight between 5 − c and 5 + c lb with

139. ## math

(-9x^3+3x^2-15x)?(-3x)

140. ## math

graph the line 3x-4y=-8

141. ## Algebra 2

What is a recursive definition for the sequence 3, 5, 9, 17, 33..... My answer was adding muliple of numbers, is this correct?

142. ## Mth

Find the slope of the line. 2x-4y=2

143. ## research in education

Using a laid down procedure for problem identification. Identify a problem in visally handicap and: (a) write the background of the study of the problem. (b) state the problem in interrogative and declarative form. (c) give significance of the study. (d)

144. ## MaTH

Consider the line 9x-6y=-3 . What is the slope of a line parallel to this line? What is the slope of a line perpendicular to this line?

145. ## Life orientation

What according to the basic conditions of employment act applies with regard to the contraventions

146. ## edu

Which of the following statements is true? a.Language is learned only when it is taught b.Language cannot be taught c.Maturation alone accounts for the development of language d.Most children are born with a potential for language I think a. not sure

147. ## Albebra 2

Are these correct? a1=(-3x1)2 +4=13 a2=(-3x2)2+4-40 a3=(-3x3)2+4=85 a4=(-3x4)2+4=148 a5=(-3x4)2+4=229 a6=(-3x4)2+4=328 The first six terms of the sequence are 13, 40, 85, 148, 229, 328 I keep coming up with these answers but there is suppose to be an error

148. ## Math

Derek had a square box lid and 10 marbles. He placed all 10 marbles along the inside walls of the lid and had an equal number of marbles on each of the four sides. How many marbles were on each side?

149. ## Math

In traveling to Greece Jim found the exchange rate to be 148 drachma equal to one American dollar. He bought 3 of the same prices items and spent almost \$10 American. What was the maximum amount of drachmas for each item?

150. ## Math

In traveling to Greece Jim found the exchange rate to be 148 drachma equal to one American dollar. He bought 3 of the same prices items and spent almost \$10 American. What was the maximum amount of drachmas for each item?

151. ## Chemistry

Why is the enthalpy of the reactants greater than the enthalpy of the products in an exothermic reaction? If it has something to do with the reactants having weaker bonds, why do weaker bonds have higher energy/enthalpy? It doesn't really make sense to me

152. ## Chemistry

Define a.m.u?

asked by Ajay pratap
153. ## parallel structures

Either you can eat or talk, but you can't do both at the same time.

154. ## Science

Why do you think people wrestle alligators?

155. ## Math

I am not understanding this problem 3^-1x^4/3^3x^-7 The negative exponents is messing me up. could some one explan a easy why to do it.

asked by Kate L
156. ## science

Eight of nine phylum of animal kingdom are made up of A. vertebrates b.chordates c. invertebrates d. jointed-leg animals

157. ## Math

graph the line 3x-4y=-8 Could you show how you got the answer so I can work it out also

158. ## College Algebra

A company is planning to produce and sell a new line of tvs. The fixed cost for the company is \$400,440 and each tv cost \$845 to produce. If they project the sales price of 1200, how many tvs will need to be sold to break even? If they decide to reduce the

159. ## physics

The membrane that surrounds a certain type of living cell has a surface area of 4.9 x 10-9 m2 and a thickness of 1.2 x 10-8 m. Assume that the membrane behaves like a parallel plate capacitor and has a dielectric constant of 5.5. (a) The potential on the

160. ## physics

Consider the state |ÏˆâŒª = âˆš2 |0âŒª + âˆš2 |1âŒª from the previous question. To estimate the phase Î¸, we measure |ÏˆâŒª in the sign basis. What is the probability that the outcome of the measurement is +? Recall that eiÎ¸ =

161. ## physics

Suppose that a qubit is in the state |Ï†âŒª = a|0âŒª + 1 âˆ’ a2 |1âŒª where a âˆˆ [âˆ’1, 1]. If we ï¬rst perform a standard basis measurement on this qubit and then perform a |uâŒª, |uâŠ¥ âŒª-basis mea- âˆš surement

162. ## Pre-calculus need help!!

Quadratic Formula 1.) x+6/x=-7 2.) 4x/x+4 + 3/x-1 = 15/x^2+3x-4 3.) x+3/x - 2/x+3 = 6/x^2+3x formula: -B+ sqrt B^2 + (-4)(a)(c)/2a f u only wanted to use the formula it's not necessary though. please help me! it's going to pass tomorrow!! please!

163. ## math Statistics

Suppose that 33 out of 300 selected american drivers read the newspaper while driving. what percent of sample proportions are greater than this?

164. ## Physics

A 0.255 kg ball was thrown vertically upward from a bridge 10.3 meters above the ground with an initial velocity if 31.7 meters/second. Calculate the balls velocity when it hits the water.

asked by Billy johnson
165. ## Calculus

sec theta 5 need to find cos theta cot theta cot (90-theta) sin theta not sure what to do completely confused on this stuff

166. ## physics

Two capacitors have the same plate separation, but one has square plates and the other has circular plates. The square plates are a length L on each side, and the diameter of the circular plate is L. The capacitors have the same capacitance because they

167. ## Physics

The recovery time of a hot water heater is the time required to heat all the water in the unit to the desired temperature. Suppose that a 62-gal (1.00 gal = 3.79 x 10-3 m3) unit starts with cold water at 11 °C and delivers hot water at 53 °C. The unit is

168. ## Physics ~ CONSERVATION OF MOMENTUM~

1.) A 10,000 kg railroad car traveling at a speed of 24.0 m/s strikes an identical car at rest. If the cars lock together as a result of the collision, what is their common speed afterward? 2.) A 3.0 kg ball at 3 m/s and strikes a 1.5 kg ball moving at -2

169. ## Math

Derek had a square box lid and 10 marbles. He placed all 10 marbles along the inside walls of the lid and had an equal number of marbles on each of the four sides. How many marbles were on each side?

170. ## Physics

A battery delivering a current of 55.0 A to a circuit has a terminal voltage of 21.8 V. The electric power being dissipated by the internal resistance of the battery is 36 W. Find the emf of the battery.

171. ## Please help with a trapezoid - circle problem

A circle with radius 3 is inscribed in a isosceles trapezoid with legs of 10. Find the length of the smaller base. When I draw a diagram, calling the trapezoid ABCD with A and D at the bottom, I see that the length from where the altitude from B and C hits

172. ## math

if you invest \$25,000 in an account that gets 12% annual interest compounded quarterly, how much would you have in 10 years?

173. ## math

If you invested a penny on Jan 1,1776 at 10% interest compounded daily, how much would you have on jan 1 2011?

174. ## math

how may 9-inch-square floor tiles are needed to cover a rectangular floor that measure 12 feet by 15 feet

175. ## Chemistry

At 25 degrees C and 1 atm gas pressure, the solubility of CO2(g) is 149 mg/100 g water. When air at 25 degrees C and 1 atm is in equilibrium with water, what is the concentration of dissolved CO2, in mg/100 g water? Air contains 0.037 mol % CO2(g). the

176. ## Physical Science- Balance Equations

Hi! Can someone please balance these equations, please?! I'm having major trouble! Thank you! HCl (aq) + NaHCO3 (aq) ¨ HBr (aq) + NH3 (aq) ¨ LiHCO3 (aq) + HI (aq) ¨

177. ## Chemistry

How many milligrams of a mixture containing equal numbers of moles of CH and N2 at 10.0 atm total pressure will dissolve in 1.00 L of water at 20 degrees C? Answer should be 2.1 x 10^2 mg

178. ## Math

How many milliliters of pure acid must be added to 150 milliliters of a 70% solution of acid to obtain a 80% solution?

179. ## Math

How many gallons of a 13%-salt solution must be mixed with 6 gallons of a 22%-salt solution to obtain a 16%-salt solution?

180. ## Chemistry

The vapor pressure of benzene (C6H6) at 25 degrees C is 95.1 mm Hg. What is the vapor pressure of benzene above a solution in which 5.05 g C6H5COOH (benzoic acid) is dissolved in 25 g C6H6? Answer should be 93.9 mmHg

181. ## Math

How long will it take P dollars to triple itself at 14% simple interest?

182. ## Math

How long will it take \$600 to double itself at 12% simple interest?

183. ## Calculus

find the derivative. f(á)=ln(siná)

184. ## college algebra

Finding domain f(x)=1/x^2-5 Can't remember how to solve, your help is appreciated:-)

185. ## Physics

Determine the voltage across the 5.0-Ù resistor in the drawing.

186. ## Medical Terminology

Your boss expects you to stay late to cover the workload of a coworker who is out sick,but you are supposed to help your mother with some work on her house tonight. your are suffering from: 1. role overload 2. role conflict 3. role ambiguity 4. learned

187. ## Math

Chris deposited \$1,500 in a bank account for 2 years. The account earned \$120.00 in simple interest. What simple interest rate did he receive?

188. ## Chemistry

Help!!!!!!!!!!!! Fe + CuSO4 --> Cu + FeSO4 2.05g 7.00g 2.46g 151.8g Which reactant was limiting and how does this chemical equation support this? The numbers beneath the names are the masses in grams.

While rummaging, Bernard found a figurine that he believed to be made out of silver. To test his guess, he looked up the density of silver and found it to be 10.5g/cm^3. The figure had a mass of 149 g. To determine its volume, he dropped it into a

190. ## Chemistry

Why wouldn't you do this reaction directly in a lab (and would rather use Hess' Law to determine the enthalpy of formation)?: 1/2N2(g) + 2H2(g)+ 1/2Cl2(g) -> NH4Cl(s) I don't think the reactants are that dangerous...? It's still pretty safe to do in a lab,

191. ## Economics

The following is a cost function for clinic visits in a small inner city clinic: a.Determine the marginal cost for each level of output. b.If the price per visit is given to be \$25, at what level of visits will the maximum profit position be? What are the

192. ## Peinciples of Management

a 31 year old female contracted HIV human immunodeficiency syndrome) Ordinarily harmless infections are deadly to her. Which answer below best explains how her antibody-response (b cell immunity) became weakened even though HIV primarily infects cells

193. ## geometry

Can a line segment have two midpoints?

194. ## College Algebra

Write the equation of the circle in standard form. Find the center, radius, intercepts, and graph the circle. x^2+y^2+16x-18y+145=25

195. ## Physics

the energy that can extracted from a storage battery is always less than the energy that goes into it while it is being charged. why?

196. ## Pre Algebra

A wooden railing is 82 feet long. It is to be divided into 4 pieces. Three pieces will be the same length, and the fourth piece will be 2 feet longer than each of the other three. Find the length of each piece.

197. ## Chemistry

If you want to make 75 mL of a 0.015 M solution of B(OH)3 in water, how many grams of B(OH)3 would you need?

198. ## math/geometry

if the circumference of a circle is 12.56 m then what is its diameter?

199. ## Physics

A 4.19-F and a 7.46-F capacitor are connected in series across a 35.0-V battery. A 8.46-F capacitor is then connected in parallel across the 4.19-F capacitor. Determine the voltage across the 8.46-F capacitor.

200. ## Anatomy and Physiology

Which answer below includes all the phases of respiration? A.Beathing,pulmonary ventilation,gas transport, and cellular respiration B.Pulmonary ventilation, ecternal respiration, internal respiration,and gas transport C.Inhalations, ecternal respiration,

201. ## albebra

a cubic millimeter of the blood contains 22 to the 3rd power of white blood cells and 22 to the 5th power of red blood cells What is the ratio of whiteblood cells to red blood cells?

202. ## Chemistry

Hi! I am doing this chemistry lab of solubility curve of a solid investigation and this is for KCl. The purpose of this lab is to investigate the relationship between the solubility of potassium chloride and the temperature of its solution and to create a

203. ## Math Help Please!!!!!!

Which figures will always be similar to each other? two rectangles, two trapezoids, two equilateral triangles, or two hexagons.

204. ## trig.

8x^3+4x^2-4x solution sets

205. ## Math

Tierra,nico, and alex had 856.00 together. Tierra spent 2/5 of her money,nico spent 40.00, and alex spent twice as much as tierra. If the three friends the same amount of money left hw much did alex have in the beginning?

206. ## CHEMISTRY

In a certain compound of copper and oxygen, a sample weighing 0.5424g contains 0.4831 g of Cu. How many moles of Cu in the sample? How many grams of Oxygen and how many moles of Oxygen are there in the sample? What is the mole ratio of Cu/O in the sample?

207. ## chemistry

In a certain compound of copper and oxygen, a sample weighing 0.5424g contains 0.4831 g of Cu. How many moles of Cu in the sample? How many grams of Oxygen and how many moles of Oxygen are there in the sample? What is the mole ratio of Cu/O in the sample?

208. ## Chemistry

Hi! I am doing this chemistry lab of solubility curve of a solid investigation and this is for KCl. The purpose of this lab is to investigate the relationship between the solubility of potassium chloride and the temperature of its solution and to create a

209. ## college algebra

Solving for a variable 4x^2+3y=y+1/3 I'm stuck thanks

210. ## social studies

African Amrican used both petitions and demonstrations to fight for the cilvl rights?

211. ## Chemistry

How many grams of magnesium sulfate would you need to make 0.500 L of a 10.0% M/V solution in water? Please show work.

212. ## social studies

how are they different?

213. ## math

14=2/3(9y-15)

214. ## History

What do Eugene V. Debs, Jeannette Rankin, and Randolph Bourne all have in common? Is it that they were all against American entry into WWI?

215. ## statistics

The average weekly earnings in dollars are listed below. What value corresponds to the 40th percentile? 804 736 659 489 777 623 597 524 228

216. ## trigonometry

what are the solution sets to x^5-2x^3+x=0 and how do you get them?

217. ## statistics

sing the proper average, find the average number of grams of fat per ounce of meat or fish that a person would consume over a 5-day period if he ate these: 3 oz fried shrimp 3.33 g/oz of fat 3 oz veal cutlet 3.00 g/oz of fat 2 oz roast beef 2.5 g/oz of fat

218. ## Math

The javelin event is held on the field inside the track. This field is a rectangle measuring 100 meters by 64 meters, with a semicircle at each end. Early modern Olympic javelins were designed so well that javelin throwers could throw them beyond the field

219. ## Maths

Solve the equation:a right pyramid with vertical height stand on rectangular base widith that measures 20cm by 14cm the hieght of the pyramid is 10cm calculate to 3 significant figure the length of the slant height , the surface area of the pyramid, volume

220. ## introductory Facts and concepts

On page 111 of your reading material there is a problem that requires you to calculate the average speed for a daylong bus trip. The rest stops the driver made are included in the calculations because that is how the problem is defined. However, suppose

221. ## social studies

African amirican used both petitions and demonstrations to fight for cilvil rights?

222. ## physics- mechanics

A light, rigid rod with two masses attached to its ends, one of mass 3M and one of mass M, is pivoted about a horizontal axis. The mass 3M is length L from the pivot point and the mass M is length 2L from the pivot point. When released from a horizontal

223. ## science

an iron calorimeter has a heat capacity of 68.85 kJ/oC. what is its mass

224. ## social studies

How are petitions and Demonstrations similar?

225. ## Finite Math

Determine the amount of the ordinary annuities at the end of the given periods. \$200 deposited monthly at 1% per month for 20 months.

226. ## Math

How do I work this problem: 4/5 X 10=

227. ## Finite Math

The amount (future value) of an ordinary annuity is given. Find the periodic payments. A = \$2500, and the annuity earns 6.5% compounded annually for 4 years.

228. ## math

what is the greatest possiable error for 28000?

229. ## Math

Rearrange this expression into quadratic form, ax2 bx c = 0 0.20= ((x^2)/(55-x)) where a = 1, and identify the values of b and c.

230. ## 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? \$.50

231. ## Psychology

Do Psychologist adhere to the same code of ethics as a social worker? What is the number 1 ethical concern of a psychologist? What area of malpractice do psychologist face most.

232. ## phi103

Truth tables can (Points : 1) display all the possible truth values involved with a set of sentences. determine what scientific claims are true. determine if inductive arguments are strong. determine if inductive arguments are weak.

233. ## chemistry

if 45 g of calcium carbide reacts with 23 g of water, how many liters of acetylene can be produced, assuming the reaction goes to completion at 60 degrees fahrenheit and 763 mmHg

234. ## History

Were there any common themes between the elctions of 1916, 1920, and 1928?

235. ## MATH

Write the equation of a line perpendicular to the given line but passing through the given point. y=x+4 (-7,1)

236. ## chm

The Lewis dot structure of ammonia, NH3, reveals that it has one lone pair of electrons and three bonds (each to a hydrogen) around the central nitrogen atom. According to VSEPR theory, what molecular shape will it have? i thought it was tetrahedral but

237. ## chm

1. What does the term electronegativity mean? Answer the tendency for an atom to pull electron density toward itself the number of positive charges in the nucleus minus the number of electrons around it an atom's ability to form bonds with oxygen atoms my

238. ## chemistry

1. Electronegativity differences give us a sense of a bond's polarity. Which of the following bonds would you expect to be most nonpolar: C-O, C-Si, C-B, or C-S? Answer my first anwer was C-O C-B C-S my answer C-Si can you explain a little further on what

239. ## chm

How many valence shell electrons would you expect for an S2- ion? 8 Am I correct.

240. ## math

a manager bought some stamps. she gave 1/3 of them to a cashier and 1/5 of them to her secretary. if the secretary received 40 fewer stamps than the cashier, how many stamps did the cashier receive?

241. ## math

zoe, minh, and jake sold some tickets for a school fundraiser. each ticket cost \$2. zoe sold 1/2 of the tickets. minh and jake sold the remaining tickets in the ratio 1:3. if zoe sold 36 more tickets than minh, how much money did the 3 students collect

242. ## math

Rationalize the Denominator of the expression. 5/ãdh

243. ## Statistics

Which of the following is an accurate description of Simpson's paradox? When groups of data are aggregated, an association can get stronger because of a confounding variable. That confounding variable is usually the number of observations in different

244. ## chemistry

This question id from IB exam,please help! 1)Which compound has the highest lattice enthalpy? A. CaO B. CaS C. LiF D. LiI Explain the reason ?

245. ## Calculus

calculate the derivative (2,5) (2.1,5.3) h'(2) if h(x)=(f(x))^3 k'(2) if k(x)=f(x))^-1 g'(5) if g(x)=f^-1(x)

246. ## Organic Chemistry

I am trying to figure out if I am correct about the solubility of 9-fluorenone in NaOH and diethyl ether and the solubility of benzoic acid in NaOH and diethyl ether 9-fluorenone is soluble in diethyl ether because it can hydrogen bond with water so it is

247. ## Chemistry

I need to write a balance equation of the decomposition of aluminum carbonate. I know the starting "reactant" is Al2(CO3)3 but would the "product' be 2Al + 3(CO3) ? Thanks

248. ## chem

A solution prepared by dissolving 3.00 grams of ascorbic acid (vitamin C, C6H8O6), in 50.0 grams of acetic acid has a freezing point that is depressed by T = 1.33 oC below that of pure acetic acid. What is the value of the molar freezing point-depression

249. ## Stress and time Management

answers to exam for penn foster

250. ## Chemistry

two solutions are prepared using the same solute solution a: 0.27g of the solute disolves in 27.4g of t-butanol solution b: 0.23g of the solute disolves in 24.8g of cyclohexane which solution has the greatest freesing point change? show calculations and

251. ## Chemistry

A sample of metallic element X, weighing 4.315g, combines with0.4810 L of Cl2 gas (at normal pressure and 20.0C) to form the metal chloride with the formula XCl. If the density of Cl2 gas under these conditions is 2.948g/L, what is the mass of chlorine?

252. ## chemistry

What is the maximum mass of H2O that can be produced by combining 90.8 g of each reactant

253. ## Chemistry

I wrote an introduction for a lab report for the first time, and I was given no samples (my teacher said "feel free to ask your friends who had chemistry last semester if you can see their introductions... none of my friends took it last semester, so I

254. ## chemistry

At 25°C, Kp = 2.910−3 for the following reaction. NH4OCONH2(s) 2 NH3(g) + CO2(g) In an experiment carried out at 25°C, a certain amount of NH4OCONH2 is placed in an evacuated rigid container and allowed to come to equilibrium. Calculate the total

asked by Ashley Jimenez
255. ## Chemistry

two solutions are prepared using the same solute solution a: 0.27g of the solute disolves in 27.4g of t-butanol solution b: 0.23g of the solute disolves in 24.8g of cyclohexane which solution has the greatest freesing point change? show calculations and

256. ## Economics

Joe's utility over consumption and leisure is given by c^(1/2)+@l^(1/2), where @ is a positive constant. Find and graph Joe's labor supply.

257. ## Finite Math

The amount (future value) of an ordinary annuity is given. Find the periodic payments. A = \$14,500, and the annuity earns 6% compounded monthly for 10 years.

258. ## Chemistry

Firstly, is this right?: Exothermic reactions have a negative enthalpy change value because the enthalpy of the reactants are greater than the enthalpy of the products *since the reactants have weaker bonds.* (especially the starred part, I'm wondering

259. ## solid chemistry

H1P2: DECOMPOSITION OF AMMONIUM NITRATE Solid NH4NO3 (ammonium nitrate) decomposes on heating to 400°C, forming N2O gas and water vapor, H2O. (a)Write a balanced chemical equation.

260. ## Finite Math

The amount desired in a sinking fund is given. Find the periodic payments required to obtain the desired amount. A = \$75,000, the interest rate is 7.2%, and payments are made quarterly for 4 years.

261. ## English 11

What are three dominant rhetorical devices in the essay "Where the World Began" by Margaret Laurence?

262. ## UOP

Templeton Extended Care Facilities, INC. is considering the acquisition of a chain of cemeteries for \$370 million. Since the primary asset of this business is real estate, Templeton’s management has determined that they will be able to borrow the

263. ## geometry

your neighbor is standing at the top of a 14 foot ladder. the base of the ladder is 4 feet from the house. how far off the ground is the neighbor

264. ## chemistry

A factory that specializes in the refinement of transition metals such as titanium was on fire. Provide kinetic-based arguments (concentration and temperature) explaining why water would be dangerous for the firefighters.

265. ## Chemistry

I need help with this lab. Write the equation for the decomposition of the hydrate, CuSO4*XH2O. Mass of crucible and hydrate: 93.000g Mass of crucible and pure salt: 91.196g I need to calculate the following: 1. mass of water in hydrate sample(g) 2. number