# Questions Asked onNovember 7, 2014

1. ## Math

sec 7pi/4 without a calculator Find the exact answer

2. ## chemistry due soon

Which reaction shows that the enthalpy of formation of CS2 is Hf = 89.4 kJ/mol? A. C(s) + 2S(s) CS2(l) + 89.4 kJ B. C(s) + 2S(s) + 89.4 kJ CS2(l) C. C(s) + 2S(s) + 89.4 kJ CS2(l) + 89.4 kJ D. C(s) + 2S(s) CS2(l) I think the answer is a or b

3. ## Physics

A target lies flat on the ground 4 m from the side of a building that is 10 m tall, as shown below. The acceleration of gravity is 10 m/s2 . Air resistance is negligible. A student rolls a 4 kg ball off the horizontal roof of the building in the direction

4. ## Spanish

Sra. do my answers look correct? Querida Abby… Complete el párrafo abajo por escoger una palabra lógica de la lista siguiente para llenar los espacios en blanco. Querida Abby, Tengo un problema. No sé qué debo ___(1)____. Recientemente, mi novio ha

5. ## Physic

A penny on its side moving at speed v slides off the horizontal surface of a table a vertical distance y from the floor. a) Show that the penny lands a distance v√(2y/g) from the base of the coffee table. b) If the speed is 3.5 m/s and the coffee table

6. ## Physics

A cannon is fired from the ground at an angle of 30 degrees. It is being shot an an initial velocity of 200m/s. What is the maximum height of the cannon ball? How fat will the cannon ball travel before it hits the ground

7. ## Chemistry due soon

If the following reaction: NO(g) + 1/2O2(g) NO2(g) has the following enthalpy change: H° = -56 kJ/mol What is the enthalpy of the decomposition reaction of 2 moles of NO2? A. 112 kJ B. 56 kJ C. -56 kJ D. -112 kJ i think the answer is d

8. ## Physics Science

How many kilocalories of heat are required to melt 20.0 kg of ice at 0°C? Okay so the given is m=20.0kg Ti=0°C HeatFusionIce=80 kcal/kg

9. ## english

The fishing having become so poor, we packed up camp and moved to another lake. past participial phrase noun clause adverb clause nominative absolute elliptical clause

10. ## chemistry

Which of the following compounds are organic? Check all that apply. SO2 CH3F C8H18O Cu(NH3)6Cl2

11. ## economics

Are there some jobs that don't fit Marx's claims? If so, what are they, and why don't they lead to estrangement and alienation? If not, why are estrangement and alienation part of all forms of labor? i said not estrangement and alienation are part of all

12. ## algebra and geometry

On a floor plan, a room measures 2 inches by 5 inches. If the scale is 1 inch =4 feet, what is the actual size of the room?

13. ## Physics

If rocket had been 10 m above the ground when its horizontal distance from the launchpad was 2m ,wheredo you think rocket would have landed

14. ## economics

What was Marx's purpose in writing this essay? Does he succeed in getting his point across?

15. ## chemistry

Which of the following is a feature of an aromatic compound? Which of the following is a feature of an aromatic compound? It has a strong aroma. Its formula contains only six carbon atoms. It contains a benzene ring. It contains only carbon-carbon double

16. ## chemistry

Which of the following is a fluorinated hydrocarbon? Which of the following is a fluorinated hydrocarbon? carbon tetrachloride teflon DDT chloroform

Find exact values for all the solutions to the equation cos theta = sqrt 3/2 for -2pi

18. ## sentence structure

What is the subject and predicate of this sentence? "There are children waiting." Is it "children are waiting" or "there are"?

19. ## economics

Do Marx's claims about estrangement and alienation still hold true today? Explain. not sure

20. ## math

James wishes to make a deposit. He has these bills: 16 ones, 5 fives, 5 tens, and 3 twenties. He has 4 nickels, 20 dimes, and 16 quarters. James has checks for \$66 and \$53.75. James wants to receive \$50 in cash. What should he enter on the TOTAL line? \$

21. ## Preschool/Kindergarten

Which of the following is a reason why kindergarten was started in the United States? a. Kindergarten was designed to be affordable to most people. b. Kindergarten was designed to be universally available for all. c. Kindergarten was designed to make a

22. ## Physics

Power supplied to a particle of mass 2 Kg varies with time as p = 3t^2/2 watt. Here t is in seconds. If initial velocity = 0, find the velocity after 2s. Sorry for not proving my work. Frankly speaking I'm unable to solve any power questions. Any help

23. ## math again (last question help!!!)

three bookshelves contain a total of 35 books. The first and second shelves contain a total of 20 books. the second and third shelves contain a total of 28 books. how many books are on the second shelf then?

24. ## economics

Does Marx's essay help illuminate any of your own work experiences? Can you relate to his discussion? Why or why not? what if i don't have any work expericence could i just said that or is it talking about another work

25. ## Chemistry

1.Calculate the density of oxygen, O2, under each of the following conditions: STP 1.00 atm and 20.0 ∘C 2.To identify a diatomic gas (X2), a researcher carried out the following experiment: She weighed an empty 4.3-L bulb, then filled it with the gas at

26. ## Calculus

A large container has the shape of a frustum of a cone with top radius 5 m, bottom radius 3m, and height 12m. The container is being filled with water at the constant rate 4.9 m^3/min. At what rate is the level of water rising at the instant the water is 2

27. ## physics

A cannon fires a 0.598 kg shell with initial velocity 10 m/s in the direction 46◦ above the horizontal. The shell’s trajectory curves downward be- cause of gravity, so at the time t = 0.53 s the shell is below the straight line by some verti- cal

28. ## Math Help!

tan (2theta + 8) = -0.489 theta = ? i'm on my last attempt to solve this problem on my hw. I tried subtracting 8 from -0.489 then trying to find the inverse but no luck.... I got -4.245 as one of my answers,-0.7267, no luck so far :(

29. ## math help

Steve plants ten trees every three minutes. If he continues planting at the same rate, how long will it take him to plant 2500 trees? Express answer as a decimal in terms of hours.

30. ## math

Bert is 5 years older than twice the age of mario. Nine years ago, the sum of their ages is 50. How old is each now?

31. ## BRAINMATH

BobPursley has 3 more brothers than sisters, how many more brothers than sisters does his sister mary have?

32. ## helpppppppp

Seven cats and 3 dogs weigh as much as 4 monkeys. One monkey weighs as much as 1 cat and 1 dog. How many cats weigh as much as 1 dog?

33. ## Chemistry Physics

How many joules of heat need to be removed to condense 1.50 kg of steam at 100°C -Specific Heat for steam is 2000 J/kg°C-

34. ## Science

1. A balloonist drops an apple weighing 1.5 N over the side of the balloon's gondola. As it falls and increases speed, the drag force from the air upward on it increases. When the upward force is 0.7 N, what is the direction and magnitude of the net force

35. ## AP CALC. AB

Please help me with this problem and please walk me through each step i am really confused. Sand is falling from a rectangular box container whose base measures 40 inches by 20 inches at a constant rate of 300 cubic inches per minute. a) how is the depth

36. ## Art History

Which of the following best describes the meaning of "upper" Paleolithic? A. The earliest part B. The latest part C. From Northern Europe D. The highest elevation I think it's D., but not sure.

37. ## physics

A box is put on a scale that is marked in units of mass and adjusted to read zero when the box is empty. A stream of marbles is then poured into the box from a height h = 6.93 m above its bottom at a rate of R = 128 (marbles per second). Each marble has

38. ## chemistry

8.00g of NaOH are dissolved in water to make 4.00L of solution. What is the concentration of hydronium ions, [H3O+], in this solution? Express your answer with the appropriate units.

39. ## Calculus (math)

A boat leaves a dock at 2:00 P.M. and travels due south at a speed of 15 km/h. Another boat has been heading due east at 20 km/h and reaches the same dock at 3:00 P.M. How many minutes past 2:00 P.M. were the boats closest together?

40. ## English

1. He refused to help me. 2. He rejected to help me. 3. He dislikes to help me. 4. He refused helping me. 5. He rejected helping me. 6. He dislikes helping me. -------------------- Which expressions do we have to use? The verbs, reject and refuse take 'to

41. ## English

1. You would rather not drive this afternoon. 2. You had better not drive this afternoon. -------------------- Which expression is right? are both right? Then what is the difference between them? ==================== 3. You would rather stay at home than

42. ## anger management

did you ever confuse anger with aggression? please explain how.

If the following reaction: NO(g) + 1/2O2(g) NO2(g) has the following enthalpy change: H° = -56 kJ/mol What is the enthalpy of the decomposition reaction of 2 moles of NO2? A. 112 kJ B. 56 kJ C. -56 kJ D. -112 kJ i think the answer is d

What is the purpose of a calorimeter? A. To determine the temperature of a chemical reaction B. To determine the energy changes of a chemical reaction C. To identify the specific temperature of an unknown substance D. To measure the average kinetic energy

45. ## science help!!!!!!!!!

Carbon dioxide is obtained from the air and changed into carbohydrates and oxygen during the process of A. Fossilization B.resperation C.digestion D.photosynthesis Is the answer B?

46. ## math

Create an addition word problem and a subtraction word problem using fractions. Show how to find the solution to each problem. Once you find the solutions to your problems, rewrite the solutions as either a terminating or nonterminating decimal.

47. ## chemistry

How do carboxylic acids and esters differ in chemical structure? Check all that may apply. Esters have a hydroxyl group. Esters have a carboxyl group. Esters have a carboxyl group and hydrogen linkage off the alpha carbon. Esters have a carboxyl group and

48. ## Chemistry

State the full electron configuration of a free nitrogen atom.

49. ## Science Help!!!!

Which sequence of processes must occur for an atom of carbon to go from a car to a tree? A. Resperation, decomposition B. Combustion, photosynthesis C. Fossilization, decompisition D. Fossilization, photosythesis Is the answer B? Thanks

True or false- The primary location for digestion to occur is in the stomach. Is the answer true???

51. ## physics

A coolant fluid has a latent heat of evaporation of 234 kj/kg . If the pump rate is 2250g per minute. How much thermal heat is removed each hour?

52. ## Math

Felix used a scale factor of 1 inch = 2.5 feet to draw model of his backyard, as shown below. He is planning to build a fence around the yard. If the cost of the fence is \$3.50 per foot, how much will it cost him to build the fence? Length 2.75in. width

64% of 75 tiles 2 doctors is ______ % of 25 doctors 360 kilometers is 24% of kilometers 80% of _______ games is 32 games 75% of ________ peaches is 15 peaches

54. ## East and Southeast Asian

1. Which of the following cities is located on the most densely populated island of Indonesia? A. Manila B. Bangkok C. Jakarta D. Kuala Lumpur 2. Distinguishing unique patterns of biodiversity in eastern and western areas of Southeast Asia, the Wallace

55. ## Math

Explain what each of the following expressions means. Evaluate each expression for x = 0.5. Some of these may be asking for inverse and not raising to exponent of -1. Enter the exact value for angles, and round any values to three decimal places. sin^-1 x

56. ## Physics

A pendulum consists of a 2.1 kg stone swinging on a 3.6 m string of negligible mass. The stone has a speed of 7.9 m/s when it passes its lowest point. (a) What is the speed when the string is at 60° to the vertical? (b) What is the greatest angle with the

57. ## Math

A company's sales are seasonal with the peak in mid-December and the lowest point in mid-June. The company makes \$110000 in sales in December, and only \$30000 in June. A) Find a trigonometric function, s=f(t) , representing sales at time t months after

58. ## social

Ship Columbus will use on his fourth voyage :La

59. ## preschool

Letting the _________set the limits is one of the approaches to preventing misbehavior. a. approach b.environment c. feedback d. guidance I chose b-my thinking is that the environment is an important part of managing any behavior.

60. ## physics

Two cars leave the same point at the same time, each travelling at the same constant speed of 89.0 km/h and each having the same mass. However, the first car drives directly east, while the second car heads directly south. At what speed (the magnitude of

61. ## Science

Calculate the kinetic energy change in the water that occurs when 10,000lb/hr flow in a pipe that is reduced from a diameter of 2 in. to a diameter to 1 in.

62. ## Physics

block of mass 3.5 kg slides down frictionless incline that is 10 m long and inclined at angle of 37 when reaches bottom of incline it collides perfectly inelastically with another block of mass 2 kg then slides along a level floor if coefficient of

63. ## corporate accounting

meaning of reserve capital

64. ## mathematics

Find the volume of a right circular cylinder whose area of Base is 1.7cm2 and the height is 0.1cm

65. ## Physics

block slides across table with initial speed of 8 m/s coefficient of friction between block and table is .5 and table is 4 m long and 1.2 m high determine how far the block lands from the base of the table

66. ## Early Childhood Education

Studies show that early readers: A. watched educational television more than two hours a day. B. had access to a variety of reading material and watched educational television. C. knew all of the letters and sounds by age 2. D. were read fiction and

67. ## math

I can't understand rounding rules of numbers Can you simply explain it ?

68. ## English

Sympathy by Paul Laurence Dunbar I KNOW what the caged bird feels, alas! When the sun is bright on the upland slopes; When the wind stirs soft through the springing grass, And the river flows like a stream of glass; When the first bird sings and the first

69. ## Chemistry

Calculate the kinetic energy change in the water that occurs when 10,000lb/hr flow in a pipe that is reduced from a diameter of 2 in. to a diameter to 1 in. Any ideas on solving this? The answer is 2.7 lbf*ft.

another name for the deck boys on columbus's fourth voyage

71. ## math

How do you find the answer to 35.5×18.76

72. ## math

Mrs. Clarkson designed a rectangular garden with a length of 15 meters and a width of 8 meters. She plans to build a walkway through the garden from one corner to the next. What measure is closest to the length of the diagonal walkway?

asked by somebody help i am new
73. ## Math help

a cube has a volume of 125cm ^3. What is the area in cm^2 of one face of the cube? (^ = Exponent)

74. ## word problem math b

A rectangular field is 80 m long and 60 m wide. If fence posts are placed at the corners and are 10 m apart along the four sides of the field, how many posts are needed to completely fence the field?

75. ## Chemistry

Does the Hydrogen Bondings in ice form, break, and reform all the time, just like in water?

76. ## Physics Math

How many joules of heat need to be removed to condense 1.50 kg of steam at 100°C -Specific Heat for steam is 2000 J/kg°C-

77. ## Math

If a bank offers a rate of 4.5% compounded semiannually, how much should you deposit to accumulate 50,000 in 15 years

78. ## physics

Two cars leave the same point at the same time, each travelling at the same constant speed of 89.0 km/h and each having the same mass. However, the first car drives directly east, while the second car heads directly south. At what speed (the magnitude of

79. ## physic

Q: a model rocket was launched and measurements of its height and horizontal distances from the launched pad were taken as shown in the table horizontal distance from the launch pad/m : 0,1,2,3,4,5,6,7,8,9,10,11. vertical distance from the launch pad/m:

80. ## math

Olive bought a used snow blower for \$120. He charges \$10 to clear a driveway of snow. It costs him 500 in gasoline to clear a driveway. After Olvie clears 13 driveways he is finally \$_____ ahead,

81. ## Chemisty

How many litres of water at 100°C are vaporized by the addition of 5.00 MJ of heat

1.I usually don’t like to admit this, but at one time I disliked history. My teacher, Mr. Wittmeyer, was wonderful, and the material seemed interesting. When I listened to his lectures, however, I inevitably drifted off, got called on to answer, and had

83. ## CAL- derivative

Find the derivative; y= x^3(5x-1)^4 So this is my answer y'=2x(5x-1)^3 + 10x + x(5x-1) Please correct me if my answer is wrong.

84. ## Derivatives

Find the derivative of the following questions; ³√2t/(t^2-4) Every thing is under the ³√ and the / is a fraction bar. My answer is y'= t(2t)^3 Can you check my answer please

85. ## physics

Two cars leave the same point at the same time, each travelling at the same constant speed of 89.0 km/h and each having the same mass. However, the first car drives directly east, while the second car heads directly south. At what speed (the magnitude of

86. ## fraction problem pecentage

2/5 is what percent of 4/7?

87. ## Math Question

Laura was given two points (3,-2) and (-2,4) and was asked to create an equation that represents the line that passes through these points. Write two equations that she could use.

88. ## math

A STORE OWNER PLANNED to raise the price of a T-shirt by 10% - he accidently labeled 10% though. The new price is what percent less than the raised price? Mixed number and omit the % sign.

89. ## Physics

calculate the escape velocity on the surface of earth, acceleration due to gravity will be 36 percent of its value on the surface of earth .if mean radius is 6400 km?

90. ## physics

a school bus traveling along a straight road from school was found to be 2.0km North of the school 4minutes later. In another 4minutes it was 4km West of the school. Draw the position of the bus from school.

91. ## physics

A projectile is thrown from the top of a tower anf strikes the ground after 3sec at angle of 45° with horizontal . Find height of tower and speed with which the projectile was projected.

Laurie swings idly on his hammock and spies the March girls walking out to a hill. There, the sisters sit working—knitting, sewing, drawing, and reading. Feeling left out, Laurie asks if he may join them. They admit him under the condition that he

93. ## physics

Calculate the escape velocity on the surface ov moon .Given the radius of moon=1.7×10(raise to power 6)m and mass of moon =7.35×10(raise to power 22)kg

94. ## physics

Two cars leave the same point at the same time, each travelling at the same constant speed of 89.0 km/h and each having the same mass. However, the first car drives directly east, while the second car heads directly south. At what speed (the magnitude of

95. ## statistics

what is the weight between 5.5 to 6 ounce when mean is 5,75 ounce and standard deviation is 0.11

96. ## equation

a is 30% of b, b is what percent of a? Please write it in mixed number (answer)

97. ## Math

How can you sketch the graph y = |x - 2| ? A)Translate the graph of y = |x| two units up. B)Translate the graph of y = |x| two units down. C)Translate the graph of y = |x| two units left. D) Translate the graph of y = |x| two units right.

98. ## Physics help

an isolated container holding 5 kg of sulfuric acid is at 60 C. if 2.49x10^5 Joules of energy were transferred out of the acid, what would be the new temp. of the acid? show steps please!

99. ## Math

Which function could be the parent of y = 3|x| ? A)y = |x| B)y = 3x C)y = x3 D)y = 3 + x

A blacksmith at a historical reenactment is making an iron hinge. after placing the iron (0.750 kg) in the fire and shaping it with his hammer it is still at 200 C. he puts the iron piece in an 8 L bucket of water at 25 C. what is the final temp. of the

101. ## History

Help! i have a project due on Marie Antoinette and need help!

102. ## p e

Which of the following is NOT a warning sign of depression that may lead to suicide? A. Being sad about your friend moving away 3 weeks ago B. A change in appetite for the last 3 months C. Difficulty concentrating this semester D. Quitting the 4-H club

asked by somebody help i am new
103. ## Math

How Does finding the square root of a number compare to finding the cube root of a number

104. ## ASTRONOMY

Good evening all, I am working on a PowerPoint presentation for my Astronomy class about planet Earth - my question is: What is Earth's brightest apparent magnitude (if it has one)? I have searched every reliable source I know of (and that I come across),

105. ## physics

A remote-controlled toy car of mass 2.2 kg starts from rest at the origin at t = 0 and moves in the positive direction of an x axis. The net force on the car as a function of time is given by the figure. (a) What is the time rate of change of the momentum

106. ## Chemistry

what are the simplest molecules to synthesize a n,n-dimethyl-2-methylpropanamine

107. ## calculus

The Voltage v , Current I and Resistance R are related by the equation V=IR. Suppose that V is increasing at a rate of 2 volt/sec, while I is decreasing of the rate of 1/5 (amp/sec ). Let t denote time in seconds. Find the rate at which R is changing when

108. ## math

How many revolutions will a 5" id x 5/8 id pulley on a electric motor shaft rotating at 1700 rpms.

109. ## Science

What is the number of moles of HCl neutralized by .1 M NaOH. When NaOH has 14.24ml

110. ## Calculus (math)

A painting in an art gallery has height h and is hung so its lower edge is a distance d above the eye of an observer (as in the figure). How far from the wall should the observer stand to get the best view? (In other words, where should the observer stand

111. ## Math

Sin theta = 1/4, what is sec theta?, tan theta? give exact answers for 0 less than or equal to theta less than equal to pi/2

112. ## Math Trig Help

sin theta = x/3, with theta in the first quadrant, find the expression for cos theta and tan theta. Answers will be in algebraic terms of x. Give exact answers with 0 < theta

113. ## Creative thinking in preschool

Creative thinking in children is like creative thinking in adults in that they both: a. have experiences that are complex, challenging, and creative. b, have intelligence that develops onto skill. c. lack inhibition when responding to external stimuli. d.

114. ## physics

Static friction is smaller than kinetic friction because it is harder to keep an object than moving than to put it in motion.

115. ## Chemistry

A salt may be prepared by the reaction of one salt with another salt, particularly if one of the products is insoluble. In which one of the following reactions is this demonstrated? (NH4)2CO3 + K2SO4 \(->NH4)2SO4 + K2CO3 CuCl2 + 2 NH4NO3 \->Cu(NO3)2 + 2

116. ## Chem Help!

Describe how you would prepare t-butyl-n-butyl ether. assume you are working on a 1 M scale. what reagents would you use? What solvent? what reaction conditions?

solve for 0

118. ## Health

Without ________, the human body would stop working. A. A kidney B. Movement of one’s limbs C. Tendons D. Blood A?

119. ## Chemistry

What mass (in grams) of sodium chloride, NaCl, is needed to make 422. g of a 3.39%(m/m) NaCl solution? (atomic masses: Na = 22.99, Cl = 35.45)

120. ## Chemistry

Calculate the mass (in grams) of sugar, C12H22O11, in 142.4 mL of a 1.39 M solution of sugar. (atomic weights: C = 12.01, H = 1.008, O = 16.00)

121. ## chemistry

What volume (in milliliters) of 0.496 M aqueous ammonia, NH3, could be made from 17.6 mL of concentrated aqueous ammonia (15.0 M)? (atomic masses: N = 14.01, H = 1.008)

122. ## Organic Chemistry

I have a Lab assignment that requires the synthesis of carboxylic acid and our final product is Benzoic Acid. The following equation was provided: C7H8 + KMnO4 ---> MnO2 1) KMnO4, OH-, heat 2) H3O+ We were asked to balance the equation including the

123. ## Chemistry

A salt may be prepared by the reaction of one salt with another salt, particularly if one of the products is insoluble. In which one of the following reactions is this demonstrated? (NH4)2CO3 + K2SO4 \->(NH4)2SO4 + K2CO3 CuCl2 + 2 NH4NO3 \-> Cu(NO3)2 + 2

124. ## physics

A steel ball of mass m=5 g is moving at a speed of 250 m/s toward a large mass M=2.2 kg which is connected to a relaxed spring, as shown below. When the ball reaches the large mass it collides and bounces off without losing any kinetic energy. The large

125. ## Pre-Calc/Trig

Help me please. List all possible rational zeros for the polynomial function. p(x)=3x^3-2x^2-5x-2

What is cell

127. ## Preschool-Creative Thinking and Arts Based Learnin

Read the book, but could not find this answer. Creative thinking in children is like creative thinking in adults in that they both: a. have experiences that are complex, challenging, and creative. b. have intelligence that develops into skill. c. lack

128. ## Shakespeare

Why is Shakespeare’s work still worth reading?

129. ## science help!!!!!!!!!

You are creating a carbon cycle poster. In which way would you draw the arrows to show the movement of carbon through the process of resperation? A.from the rock to the air B.from the rock to the grass C.from the air to the wolf D. From the wolf to the air

130. ## Preschool Creative Thinking and Arts Based Learnin

Supporting "possibility thinking" means teachers are encouraging children to: a. first solve problems and follow directions, then "think outside the box." b. not merely solve problems but find them, then pose "what if" questions in their minds. c. play

131. ## Preschool Creative Thinking

The eclectic theoretical approach that most teachers use means that: a. the major development theories are used on different days of the week on a rotating basis. b. one major developmental theory is used for toddlers, another for preschool, another for

132. ## physics

Find the displacement of the car after 5.9 s. Answer in units of m

133. ## L.A.Help!!!!!!

Which of the following uses the indicative mood? A.I will feel flush after I get my very first paycheck today. B.I am going to be very wealthy when I receive my inheritance. C. If I were rich, I would get convertibles for us both. D. If I win the lottery,

134. ## science help!!!!!!!!!

Which sequence of processes must occur for an atom of carbon to go from car to a tree? A.resperation, decomposition B. Combustion, photosynthesis C. Fossilization, decomposition D. Fossilization, photosynthesis Is the answer B?

135. ## chemistry

How do carboxylic acids and esters differ in odor? Check all that apply. Esters smell sweeter, often fruity. Carboxylic acids have often not very pleasant smelling. Carboxylic acids smell sweeter, often fruity. Esters have often not very pleasant smelling.

136. ## algebra

would multiplying 3 negative integers always equal a positive integer?

137. ## Algebra

Let a and b be real numbers, where a

138. ## Algebra

What are the coordinates of the points where the graphs of f(x)=x^3-x^2+x+1 and g(x)=x^3+x^2+x-1 intersect? Give your answer as a list of points separated by semicolons. (So "(1,-3); (2,3); (5,-7)" is a valid answer format.)

139. ## multiplying integers

-10^2 = i know the answer is -100, but can someone explain how you actually find the answer?

140. ## Algebra

Find the number of decibels for the power of the sound given. Round to the nearest decibel. A rocket engine, 2.50 * 10^5 watts cm^2 what is the db?

141. ## chemistry

CH3-C=C-CH3 IS CLASSIFIED AS A) ALKANE B) ALKYNE C) AROMATIC COMPOUND D) HALOALKANE E) ALKENE

142. ## Pre-Calc/Trig

Use Descartes' rule of signs to describe the roots of the polynomial function. m(x)=x^3+3x^2-18x-40

143. ## Algebra

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.3 x 10^2 um. Find the earthquake's magnitude. Round your answer to one decimal place.

144. ## math

If you can earn a 4% average return on your investments, how much invested capital must you have to earn \$53000.00 per year.

145. ## AKSUM MATHS

FIND A VECTOR EQUATION OF THE LINE THAT CONTAINS(-1,3,0)& IS PARALLEL TO 2i-3j-k.

146. ## physics

A tank contains 12.2 g of chlorine gas (Cl2) at a temperature of 84 °C and an absolute pressure of 5.60 × 105 Pa. The mass per mole of Cl2 is 70.9 g/mol. (a) Determine the volume of the tank. (b) Later, the temperature of the tank has dropped to 26 °C

147. ## Intermediate Algerbra

B=18.75+585.72 where t is the number of years since 1990. In what year will the monthly benefit B exceed 1050. Totally clueless I need help!

148. ## ALakh narayan sing high school Ekma saran

Solve the Mathod of substitution 1/6(2x+3y)+x/3=8,1/2(7y-3x)-y=11

149. ## Chem

In the reaction NH4Cl = NH3 + HCl, the equilibrium concentrations were found to be [NH3] = [HCl]=3.71 * 10-3M Calculate the value of the equilibrium constant?

150. ## physics

the formula of centripital accelaration is v>2/r Q:Why here is square of speed ?

151. ## chemistry

Give a structure to match the name for the following compound. 2-pentanol

152. ## chemistry

Give a structure to match the name for the following compound. isobutyl alcohol Express your answer as a condensed structural formula.

153. ## Math

cos x = -0.6 , 0

154. ## Physics

An object is formed by attaching a uniform, thin rod with a mass of mr = 6.54 kg and length L = 5.12 m to a uniform sphere with mass ms = 32.7 kg and radius R = 1.28 m. Note ms = 5mr and L = 4R. 1)What is the moment of inertia of the object about an axis

155. ## language arts HELP

Which of the following uses the indicative mood? A. I will feel flush after I get my very first paycheck for this job. B. I am going to be very wealthy when I receive my inheritance. C. If I were rich, I would get convertibles for us both. D. If I win the

156. ## Physics

a (n) 1510 kg car is moving along a level road at 13.8 m/s. The driver accelerates and in the next 10s the engine provides 23400 J of additional energy. If 3900 J of this energy must be used to overcome friction, what is the final speed of the car?

157. ## communication

What are the four principles of verbal communication?

158. ## science Help 911!!

Carbon dioxide is obtained from the air and changed into carbohydrates and oxygen during the process of A. Fossilization B. Respiration C. Digestion D. Photosynthesis Is the answer D? Thanks

159. ## English

1. We asked 100 students "What kind of exercise do you do?" 2. We asked 100 students "What kind of exercise do you take?" 3. We asked 100 students "What kinds of exercises do you do?" 4. We asked 100 students "What kinds of exercises do you take?"

160. ## English

1. I don't wash my hands often. 2. I often don't wash my hands. 3. I don't often wash my hands. (Which one is grammatical?)

161. ## science

What would you need to know to determine the total amount of photosynthesis going on in the canopy and near the forest floor? Why?

162. ## Information and communication technology

please tell me new ideas regarding information and communication technology that have not yet used in daily life..

163. ## Physics

A plane is flying horizontally with speed 251 m/s at a height 2180 m above the ground, a package is thrown downward from the plane with a vertical speed v1 = 80 m/s. What is the magnitude of the total velocity of the package at the moment it is thrown as

164. ## information technology

please tell me a model for comunication

Is a(bc)=(ab)(ac)

166. ## Signals & Systems

The suspension system of a car is modelled by the following differential equation: M*((d^2*y)/(d*t^2) + D*(dy/dt) + Ky( t ) = x( t ) where y(t) is the vertical position of the car body, x(t) is the external force coming from the ground acting on the car

167. ## Math

theta = 16 pi / 5 How to find the reference angle in radians? Do i have to use degree to pi conversion?

168. ## Algebra

Can you solve these equation by completing the square 2x^2+7x-4=0 3x^2x-1=0

169. ## math

partb : a shopper brought four of the same shirt and paid 48\$ after the 40% discount . what was the original price of one of the shirts

170. ## Science

The latent heat of fusion for metal is 246kj per kg. How much heat would be used by melting 10 tonnes of metal?