1. MATH; STANDARD DEVIATION

suppose that prices of a certain model of new homes are normally distributed with a mean of \$150,000 use 68-95-99.7 rule to find the percentage of buyers who paid: between \$150,000 and \$152,000 if the standard deviation is \$1200

2. chemistry

Write the balanced net ionic equation for the following reaction and determine the conjugate acid-base pairs. HNO3(aq)+Li2CO3(aq)LiNo3(aq)+LiHCO3(aq) Which component in the net ionic equation is the acid, the base, the conjugate base, and the conjugate

3. chem

An unknown sample was crystallized from benzene. on cooling to 0 degree centigrade in an ice bath the amount of crystals in flask was quite large, but much of it seemed to disappear when an attempt was made to collect it by suction filtration. Explain?

4. Last week Help Math

A student asks, "If the average income of 10 people is \$10,000 and one person gets a raise of \$10,000, is the median, the mean, or the mode changed and, if so, by how much?"

5. History/ Civics

1.How did the capture of Vicksburg, Mississippi, take advantage of a Confederate weakness? A-The Confederacy had few soldiers and relied on its well-trained generals to win battles. B- The Confederacy had few weapons manufacturers and relied on Vicksburg

6. PHYSICS

A particle (mass = 5.0 g, charge = 40 mC) moves in a region of space where the electric field is uniform and is given by Ex = 2.5 N/C, Ey = Ez = 0. If the velocity of the particle at t = 0 is given by vy = 50 m/s, vx = vz = 0, what is the speed of the

7. English, pls help ASAP!!

MY answers are below the poems, pls check them for me!!!! Match the category of poetry with the except or poem A. Poetry of place B. Poetry of spirit C. Poetry of nature D. Poetry of family think it is (in order): Poetry of Nature, Poetry of Place, Poetry

8. physics

bull's-eye bob at a hunting range fires his rifle at a target 200 meters downrange. the bullet moves horizontally from the rifle barrel with a speed of 400 m/s? how far does the bullet drop from a straight line horizontal path bny the time it reaches the

9. Chemistry- is this right?

Calculate the H+ of 0.1 M NaOH Calculate the pH of 0.1 M NaOH [H+]=10^ph [H+]=10^-13 [H+]=1*10^-13M Since pH+ pOH=14 pH= -log (0.1M) pH=1 so 14-1 pH= 13

10. technology

A hydraulic lift system has an input piston with an area of 0,5 m2 and an output piston whith an area of 2 m2. What force is needes to lift a load of 1000 N?

11. chemistry

Calculate the freezing point of 1molar aqueous solution (density =1.04g) of kcl (kf for water =1.86)K=39,cl=35.5

12. Science

Can you give me examples of palatable inorganic acids other than phosphoric acid?

13. Math

Prove that 1 * 3 * 5 * ... * 2345 + 2 *4 * 6* ... * 3456 is divisible by 6789.

14. maths

the size of a red blood cell is 0.000007m and the size of plant is0.00001276 compare these two.. this question answer is 1/2 but how?

15. Chemistry

Liquid vitamin C, (ascorbic acid) C6H8O6 , readily reacts with atmospheric oxygen, O2, to form liquid dehydroascorbic acid, C6H6O6 and water. Explain why this is a chemical reaction. Write a balanced equation for this reaction. How many mole of oxygen gas

16. Chemistry-is this right?

pH: 4.9 Calculate: H3O H30= 10^-pH H3O=10^-4.9 H30=1.25 * 10^-4 AND CALCULATE OH=14-pH OH=14-4.9 OH= 9.1

17. Math

1) Which expression represents the perimeter of the triangle drawn below? The triangle has (x-1) on the left side. (x+2) is on the bottom of the triangle. (2x-4) is on the slanted top. A) 3x-3 B) 3x-5 C) 4x-3 D) 4x-5 I do not know how to do this, so help

18. math

if a room is 12ft by 14ft how many square tiles do I need to cover the floor?

19. math word problem

a service that repairs TV sells maintenance agreement for \$10 a year the average cost for repairing a TV is \$38 and 3 in every 100 people who purchased maintenance agreements have TV's that require repair. find the services expected profits per maintenance

20. history

What geographical advantage does the Italian landscape have over the Greek landscape?

21. History

1.Which 19th century movements were most associated with each another? A- Socialism and imperialism B- Transcendentalism and utopianism C- abolitionism and manifest destiny D- romanticism and democratic-republicanism 2.The writings of Transcendentalists

22. algebra need help

The highest temperature ever recorded in a certain town was 88 Fahrenheit . the lowest temperature ever recorded there was -24 Fahrenheit what is the difference between the two temperatures.

23. chemistry

How many joules is required to change the temp of 225 g of lead from 5.0*C to 25*C. specific heat of lead is 0.139J/g*C. I came up with 5805 and it just doesn't look right.

24. math

Find the surface area of the cylinder to the nearest whole number. The figure is not drawn to scale. 13 in on top, 14 in around/

25. chemistry

CH4 (g) + 2 O2 (g) --> CO2 (g) + 2 H2O (g), (triangle)H rxn =-802.3 kj How much heat is produced by the complete combustion of 237 g of CH4?

26. math

if a room is 14ft by 12ft how many 1sq. ft. tiles do I need to cover my floor?

27. math

if a room measures 12 by 15 feet how many l square ft. tiles would I need to cover the floor.

28. Civics HELP!!! Ms.Sue

Which of the following describes how the physical features of countries in North America influence trade in these countries? A) Most have flat terrain, making railroads the least expensive method of transporting goods. B) With oceans on both sides, most

29. Math

A number cube is rolled 160 times. The number 2 comes up 39 times. what is the experimental probability of rolling a 2? What is the theoretical probability of rolling a 2? A. 39/160 ; 1/80 b. 1/6 ; 39/160 C. 39/160 ; 1/6 D. 121/160; 1/6 My answer is B. Is

30. English

1. We can save water when I brush my teeth. 2. We can save water when we brush our teeth. 3. We can save water when we were brushing our teeth. ================ Is #1 correct? Is it logical? Is #2 better and correct? Is #3 the best? Thank you for your

31. Calculus and Vectors

A plane is flying south east at a constant speed of 900km/h. The wind is blowing towards the north at 100km/h. Determine the resultant velocity of the plane relative to the ground.

32. algebra 2

Which is the exponential form of log7 90 = y?

33. physics

A tennis ball is thrown vertically upwards from the ground with a velocity of 50m/s calculate.1.the maximum height reached. 2.the time to reached the maximum height. 3.the time of flight

34. physics

a diver of mass 101 kg jumps upward off a diving board into water. Diving board is 6m above water. Driver has a speed of 1.2m/s. based on speed how high above the board will she rise?

35. Math

How much farther is it around the bases of a 90 feet diamond than around the bases of a 60 feet diamond

36. Math

A person who is 5 feet tall is standing at 110 feet from the base of the tree and the tree cast a shadow of 120 feet the person shadows 10 feet in length was the height of the tree?

37. math

Jason earns 30 cents for every carrot he sells. He earns an extra \$3 for every 30 carrots he sells. How many carrots must he sell in order to earn \$555?

38. Chemistry

Based on the following balanced equation: 2 NH3 + 2 O2 -->N2O + 3 H2O a. How many moles of O2 are required to react completely with 6.00 moles of NH3? b. How many grams of O2 are required to react completely with 6.00 moles of NH3? c. How many moles of H2O

39. Chemistry

Based on the following balanced equation: 2 C4H10 + 13 O2 --> 8 CO2 + 10 H2O a. How many moles of CO2 are produced after complete reaction of 8.00 moles of C4H10? b. How many grams of CO2 are produced after complete reaction of 8.00 moles of C4H10? c. How

40. computer

2. The website for Long Island University provides online A. style guides. B. bibliography generators. C. print and ebooks that include citation and documentation guides. D. resources that are a popular means of disseminating information. 5. Penn Foster's

41. Math

Troy can order a large or small snow cone. There are 16 flavors and 2 toppings from which to choose. How many ways can Troy order a snow cone? 120 64 32 30 Is it B? what do I do?

42. Math

If p and q are relatively prime, then GCF(p,q) = ______, and LCM(p,q) = _______.

43. CHEMISTRY

When one mole of C6H6 is burned, 3.27 MJ of heat is produced. When the heat from burning 5.35 g of C6H6 is added to 5.69 kg of water at 21.0°C, what is the final temperature of the water?

44. Math Help

Hi! I need help with these two questions. Thanks! 1.) Look for the first four terms for the following sequence below. an=n(n^2-6) 2.) For this question, remember that your answer has to begin with the second term of the following sequence. Look for the

45. Chemistry

A 0.885 M solution of sulfuric acid (H2SO4) is to be reacted with a 0.552 M solution of sodium hydroxide to make sodium sulfate and water. How many L of the H2SO4 solution will react with 0.842 L of the NaOH solution? Give your answer to 3 decimal places.

46. Chemistry

C6H12O6 (aq) = 602 (g) - 6CO2 (g) = 6H20 (l) H -2837 A)Exo or endothermic? B)write an expression for the equilibrium constant C)Give the value of the equilibrium constant is very large, would this reaction be fast or slow? D)effects of equilibrium if.. i.

47. Chemistryh

How do you calculate theoretical calculated pH. 1. 0.1 M HCL pH: 1 2. 0.1 M NaOH pH: 13

48. Pressure

Aerosol cans carry clear warnings against incineration because of the high pressures that can develop upon heating. Suppose a can contains a residual amount of gas at a pressure of 750mmHg and a temperature of 23∘C. What would the pressure be if the can

49. chemistry

I posted my specific heat wrong. Now, how many joules is required to change temp of 225 g of lead from 5.0*C. specific heat of lead is 0.129J/g*C. I came up with 5805. It just doesnt look correct. Please help

50. English

What type of society & government is Brave New World by Aldous Huxley? And what aspect from the novel is relatable to history or modern society? I need to find something to challenge(a topic/idea/argument Huxley made in his novel) and write a research

51. math

A farmer wants to fence in three sides of a rectangular field shown below with 880 feet of fencing. The other side of the rectangle will be a river. If the enclosed area is to be maximum, find the dimensions of the field.

52. pressure

What is the pressure in millimeters of mercury of 0.0140mol of helium gas with a volume of 222mL at a temperature of 30∘C?

53. Math

The area of each unshaded rectangle is given (the areas given are ( 30 in.², 45 in.², 72 in.²)). What is the area of the shaded rectangle?

54. Math

A rectangle has an area of 48 square yards. For what whole number values of length & width will the rectangle have the smallest perimeter?

5.8 + 5.758

56. Chemistry

Calculate the pH of the resulting solution if 50 cm3 of 0.045mol dm-3 solution of C5H5N is mixed with 100 cm3 of 0.035 mol dm-3 of C5H5NH+

57. Accounting 111

Would the loss on retirement of long-term debt be added to or deducted from net in come in determining net cash flow from operating activities by the indirect method?

58. Math

She has 2 7/8 cups of flour, she will put 3/4 cup of flour in each cake

59. Math

1. Which function represents an initial population that increases 22% per year where A represents the initial value and X represents time in years? A. Y=A(0.22)^x B. Y=A(0.68)^x C. Y=A(1.22)^x D. Y=A(1.68)^x I do not get how to solve this problem. Any help

60. Math

If a square is a kite it must have?

61. Math

Is 2^6 * 3^10 * 5^12 * 7^15 * 1^18 a prefect square? Explain how you know.

62. Analytic Geometry

write the equation of the line a) parallel to b)perpendicular to 4x+3y-10=0 and is 3 units from the point (2,-1)

63. English

1. I couldn't go to school for some weeks. 2.I couldn't go to school some weeks. ============ Can we delete 'for' as in #2?

64. Math

You rolled a number cube number from one to six 12 times. p(5)=2/3 What type of probability is this and why?

65. English

1. A doctor is a person who is trying for sick people. 2. If it snows tomorrow, I will play a snowball fight with my friends. ========================== Q1: Are both grammatical? Q2: Can we use 'play' instead of 'have' as in #2?

66. chemistry

Table of enthalpy of solution for selected cesium salts Compound and ΔsolH kJ mol-1: - Cesium bromide: 25.98 - Cesium iodide: 33.35 - Cesium chloride: 17.78 - Cesium fluoride monohydrate: -10.46 - Cesium fluoride sesquihydrate (·1.5H2O): -5.44 Data taken

67. chem

The allium family of vegetables, which include onion, leek, garlic and chives contain sulfur containing compounds. These chemicals are responsible for the vegetables' characteristic odour and properties. One such compound is allylmercaptan. 10.0 g of an

68. science

The aquarium was sealed and placed at a bright corner. After two weeks, both the number of water plants and water snails increased. (a) Besides their gaseous needs, state one other way in which the water snail and the water plant are interdependent.

69. statistics HELP

A student asks if it is possible to have a standard deviation of -5. How do you respond?

70. Algebra 2

Solve the Equation. (x+2)/(4x)-3/(2x)=1/8

71. Chemistry

Carbon monoxide and hydrogen react according to the equation: CO(g) + 3H2(g) CH4(g) + H2O When 1.00 mol CO and 3.00 mol H2 are placed in a 1L flask at 1200K and allowed to come to equilibrium, the reaction mixture is found to contain 0.387 mol H2O. What is

72. English

what should you do if you need to cite a book for which you don't know the author?

73. Math

Hello again! I would appreciate help very much on this. Thank you! 1) For which values of x is y equal to 16 in the equation y=|3x+4|? A) -60 and 36 B) -36 and 60 C) -20/3 and 4 D) 20/3 and 4

74. English

1. We can save environment when we don't make junk any more. 2. If you run every day, you will get health. 3. We can save the electricity when we turn off the computer. ==================== Q1: Are they all grammatical? Q2: Do we have to use 'the' before

75. math

In a circle with a radius of 5cm and is centered at point O, angle AOB intercepts arc AB. Arc AB has a length of 10cm. What is the degree measure of angle AOB? Round to the nearest hundredth.

76. Social Studies

The economic loss which came through war was great, but not nearly as influential as the psychological change, the change in habit and thought... "The hatred of the Yankees was increased. The defeated Southern leaders were popular heroes. Numbers of

77. Math help Steve?

1) Given that p(-3), p(-1), and p(5)=0, which expression could be p(x)? A)x^3-x^2-17x-15 B)x^3+x^2-17x+15 C)x^3-3x^2-13x+15 D)x^3-9x^2+23x-15 Hi Steve, I got what you said, but how would I solve this equation then?

78. Math

On a multiple choice exam with 25 questions, the instructor scored the exams as follows: 4 points for each correct answer, -1 for each blank answer, and -6 for each wrong answer. What was the score of a student who had 14 correct answers, 3 blank answers,

79. Calculus

What does it mean to span in R2? I have this question: Which of the following sets if vectors span R2? a) {(1,1),(-2,-2)} b) {(1,1),(1,2)} c) {(1,2),(1/2,2)} d) {(-1,1),(1,-1)}

80. SS PANAMA QUIZ

Mexico City's pollution problem is made worse by its Farmland Mass Transit System Squatters Geography*** Why did the US first need to negotiate with Colombia to build the Panama Canal? Colombia was a neighboring country Part of the canal would be located

81. Nafta government

Why is the United States involved in this organization? is it to establish a trilateral trade bloc in North America

82. history

How long did the Byzantine Empire last?

83. Chemistry-is this correct?

Calculate the pH and identify as acidic, basic,or neutral 1. H= 1.10 * 10^-11 M Answer: pH=11, basic 2. H= 2.61 * 10^-2 M Answer: pH:1.58, acidic 3. OH= 4.0 * 10^-9 M pH: 8.39, basic

84. Physcial Science

Standing on top of a tall building a student drops their physical science book. How far has the book fallen at 5 s?

85. algebra 2

How is the graph of log (x – 5) translated from the graph of log x?

86. interview for teachers

do u consider spanish language difficult? why or why not? can u say at least 10 words in Spanish (words you know its meaning) the teacher said it could be less than 10 but i need to interview a teacher so i was thinking if any teachers here could answer

87. chemistry

Solution equals 0.015 M HCl Find OH Find pH Isn't pH=1.8? I don't know how to find OH :( Is there a formula or do subtract 14-1.8? I'm confused and I got this assignment today yet we haven't gone over anything yet.

88. science

A new organism is introduced into a ecosystem. it gets its nutrients from a dead tree. can this organism be described as a scavenger or decomposer

89. English

why is traditional african is an advantage for men only ,not women?

90. physics

A smooth body slides down a plane inclined at an angle of 60degree to the horizontal calculate, A. The components of the acceleration of the body. B. Along the inclined plane. C. Perpendicular to the plane. D. The velocity of the body at the base of the

91. Calculus

Can you please explain how I would solve these questions? 1) Which point is 2 units from the line 12x-9y-5=0? a)(8,3) b)(7/6, -7/3) c)(14,6) d)(1,1) 2.) Which of the following sets of vectors spans R2: a) {(1,1),(-2,-2)} b) {(1,1),(1,2)} c) {(1,2),(1/2,2)}

92. Math

One angle of a triangle measures 105degrees and another angle measures 32degrees what is the measurement of the third angle

93. algebra

Alonzo wants to buy a bike for \$260. He can pay for it in 8 months if he pays \$60 now & \$25 each month. If he were to pay \$60 now and \$20 each month, how many more monthly payments would it take to pay for it?

94. Algebra

Jonas purchased a new car for \$25,000. Each year the value of the car depreciates by 20% of its value the previous year. In how many years will the car be worth \$5000?

95. Math

The lens of a telescope has a diameter of 24 inches. Find the exact area of the lens.

96. Spanish HELP

How would I respond to this question? Can you please give me an example!?

97. Math

Find the volume of a regular square pyramid that is 8 m high and has the length of the side of the base as 9 m

98. Math

How much glas is needed to make a fish tank that is 12 inches long, 8 inches wide, and 9 inches high? The tank is open on top.

99. Math

Find the length of the side of a right triangle side a is 40 mm the opposite is 41 mm

100. Math

Find the area of a triangle on a spherical surface that has a radius of 3cm and angles that measure 75degrees, 160 degrees, and 142 degrees.

101. math

for what whole number values of length and width will the rectangle have an area of 60 square yards and a perimeter of 38 yards?

102. math

a rectangle has an area of 48 square yards. For what whole number values of length and width will the rectang,e have the smallest perimeter?

103. math

the areas of the rectangular faces are: 90, 54, and 60. What is the volume of the box?

104. algebra

If y varies directly to x, and y=14 when x=21, what is the value of x when y=7?

105. mathssss

Solve for c (2c+5/-5)(2c+5/-5) + (4c-2/5)(4c-2/5)=20

106. FRENCH

I have this assignment in french to write and translate our summary from a movie we just watched. I need help to translate. (Can you put this summary in Past too) (I already did the summary but words look odd even though I looked on word reference when

107. ART 101

There are several, but does any one know at least the top 5 vocabulary words art historians use to describe the work of art? I have three but I would like at least 2 more. I would greatly appreciate it. Thanks

108. ninny by anton chekhov

1. How do both employers first cheat their governess? A. The employers say they mad a note of the fact that the pay is 30 rubbles a month and not 40 *** B. The employers indicate that an agreement was made about losing pay for holidays C. The employers

109. algebra NEED HELP

I've tried to do these problems multiple times and I'm just so confused. 1. (root x-5) + 5 = 0 2. (root 2-7x) = 2x Thanks!

110. physics

A 16lb block rests on a horizontal frictionless surface. A cord attached to the block, running horizontally, passes over a pulley whose diameter is 6in, to a hanging block weighing 16lb. The system is released from rest, and the blocks are observed to move

111. English

Comma or semicolon? He seemed like a cat, one that was afraid of strangers.

112. math

Ryans limo drove 24 miles east and then drove 50 miles south How far is the limo from where he started round to nearest tenth

113. math

Lee wants to cut this piece of canvas into two rectangles that are 3×2 and 3×5. He wants the sum of the two small recyangles to be the same as the area of the large rectangle. Can he do this? Explain the rectangle is 6feet across and 3feet tall

114. easy math

Troy can order a large or small snow cone. There are 16 flavors and 2 toppings from which to choose. How many ways can Troy order a snow cone? 120 64 32 30 Is it 64 or 32 what do I do?

115. chem

what are the three stages that it takes for an equilibrium to become established?

116. Calculus-limits

I'm studying for the AP exam and I can't figure this problem out. I thought the answer was negative infinity but that isn't an option. Thank you in advance! What is the limit as x approaches infinity of (9x-x^2-7x^4)/(x^3+12x)? a. 9 b. 7 c. -7/12 d. -7 e.

117. math

dave throws loose change in to a cup an takes it out every 2 weeks this time it is all nickels and dimes there are 7 times as many dimes as nickels and the value of dimes is \$5.85 more than the value of the nickels how many nickels and dimes does dave have

118. math

if a movie theater holds 1200 and 2/3 of its seat how many tickets does sell

119. Probability

Let X be a continuous random variable. We know that it takes values between 0 and 3, but we do not know its distribution or its mean and variance. We are interested in estimating the mean of X, which we denote by h. We will use 1.5 as a conservative value

120. Chemistry

Calculate the pH of the resulting solution if 50 cm3 of 0.045mol dm-3 solution of C5H5N is mixed with 100 cm3 of 0.035 mol dm-3 of C5H5NH+

121. math

A service that repairs televisions sells maintinance agreement for \$9 a year the average cost for repairing a television is \$39 and 3 in every 100 people who purchased maintenance agreements have television that require repairs Find the services expected

122. English

English is the language of opportunity.why bother to teach indigenous language.

123. science

A car owner pushes a car with a force of 80 N. The car does not move. Which of the following best describes the force that the car exerts on the car owner?

Troy can order a large or small snow cone. There are 16 flavors and 2 toppings from which to choose. How many ways can Troy order a snow cone? 120 64 32 30 Is it B? what do I do? You don't have to answer but can someone just tell me how could I answer this

125. Math

How do you tell whether a number is a perfect square from the exponents of its prime factorization? Explain why this works.

126. math

jamie is joining a music club as part of her 4-cd introductory package she can choose from 12 rock selection, 10 alternative selection 7 country selections and 5 classical selection if jamie chooses on selection from each category how many ways can she

127. subsition method

x + 5y = 126 y = 3x +6

128. English

I need to write a speech that covers in detail five PowerPoint slides and is about five minutes long. Where do I start, and how do I organize the speech?

129. measurment

Its recommended that there be at least 16.8 sq ft. of ground space in a garden for every newly planted shrub. a garden is 39.2 ft. by 15 ft. Find the maximum number of shrubs the garden can accomidate

130. Chemistry

66.9 g of a substance X dissolves in enough water to make 0.428 L of a 0.68 M solution. Calculate the molar mass of X in g/mol.

131. calculus

For the function f(x)=x^3e^x, determine intervals of increase and decrease and the absolute minimum value of f(x) To do this I found the derivative which is f'(x)=3x^2e^x. Then I set it to zero: f'(x)=0 0=3x^2e^x How would I isolate x? And when I do, I

132. Math

As x increases by 2 units, y increases by 3 units.

133. Calculus-limits

What is the limit as x approaches a of (sinx-sin a)/(x-a)? a. -sin a b. cos a c. -sin x d. cos x e. undefined Thanks!

134. physical science

A baseball diamond has 90 feet between bases. A player hits the ball and runs to 1st, 2nd and stops at 3rd base. The player's displacement is

Which of the following does not reduce water pollution? a) cleaning up oil and gasoline spills. b) reducing pollutants such as pesticides and fertilizers. c) increasing the use of gasoline.*** d) properly treating waste water Can you please check my

136. Algebra

State the domain over which the function, y=the absolute value of (x+1) , is increasing.

137. Life orientation

Discuss factors that could threaten or limit the fore functions of the media

138. Chemistry

Solarcaine aerosol spray is used for temporarily relieving pain as it works as a topical anesthetic numbing the skin. Solarcaine is in fact benzocaine, C9H11NO2 with molar mass 165.2 g/mol. If a 100.0 mL spray can contains 1.00 g of benzocaine, calculate

139. Social Studies

1. what post war industry became more important in south carolina due to new roads? a. tourism b. agriculture c. manufacturing d. mining I think its a. please help as soon as possible

140. Chemistry

Describe how you would prepare 250.0 mL of a 0.1500 M NaCl solution given that the NaCl is supplied as a solid. Describe how you would prepare 1.25 L of a 0.025 M sucrose solution from a stock solution with concentration of 5.00 M. What is the benefit of

141. Chemistry

H2S+H2O H3O +HS why THIS BUFFER SOLUTION IS ABLE TO RESIST CHANGE IN PH WHEN SMALL AMOUNTS OF OH ARE ADDED TO IT.

142. linear algebra

Suppose that we have a system consisting of two interconnected tanks, each containing a brine solution. Tank A contains x(t) pounds of salt in 200 gallons of brine, and tank B contains y(t) pounds of salt in 300 gallons of brine. The mixture in each tank

143. math

mr cook wants to fence his rectangle garden which covers 100 ft squared the width of the garden is 7 1/2 ft what is the length of the garden how much fencing mr cook need

144. PCM

Please tell me websites for online chapter wise test series for jee advanced 2015 preparation. (Chapter wise) if not then mock test papers

145. subsitution method

x+2y=56 y=3x+7

146. Math

Perry's Publishing is relocating and 2 employees, Edna and Sam have created a "For sale" sign 4 feet long to place outside the current premises. They plant o attach the sign to a 9-foot pole using a hook and a chain. They would like the top of the sign to

147. Chemistry

A standard of red dye was prepared in the following manner: 4.5mL of 0.100M of food dye was added to a test tube and 5.5mL of water was added. What was the final concentration of food dye in the test tube?

148. math; solve problem

it is recommended that there be at least 13.65 sq ft of ground sace in a garden for every newly planted shrub. a garden is 32.2' by 21'. find the maximum number of shrub the garden can accommodate.

149. chemistry

Write the balanced net ionic equation for the following reaction and determine the conjugate acid-base pairs. HNO3(aq)+Li2CO3(aq)LiNo3(aq)+LiHCO3(aq) Which component in the net ionic equation is the acid, the base, the conjugate base, and the conjugate

150. math: fundamental counting principal

with two groups of items: John is joining a music club as part of her 4-cd introductory package she can choose from 12 rock, 10 alternative, 7 country, and 5 classical. if John choose one selection from each category, how many ways can he choose her

151. English

Why traditional African marriage is an advantage for men only not women?

How can you determine if the given lines are perpendicular? Line 1: (-1,3) and (3,-3) Line 2: (-3,0) and (3,3) A)determine if they have slopes with opposite values*** B)determine if they have the same slope C)determine if the product of their slope is 1

153. Philosphy - Dream Interpreations

I recently just had a dream when I was alone in my room enjoying myself and suddenly about 4-5 to what I perceived as venomous snakes, each with a vivid and distinct coloring design, appeared from the trashcan in the room and start slithering around. As I

154. English

I'm writing an essay about poetry. My thesis is how literal language used in poetry create more still and concrete image, while poetry that uses figurative language proves more feeling. I just have no idea how to start my introductory paragraph. What do I

155. English

1. If it snows tomorrow, I will rest. 2. If you run every day, you are very strong. (Are both grammatical?)

156. Chemistry

Calculate the H+ for number #2 #2 : H+ = 10^-2, with a pH of 2 Not sure how to calculate H+

157. Math

1) Which sum best represents the model shown below? There are 3 blue blocks, and each of them separately equal x^2. There are 2 green blocks that each separately equal x. There are 2 red blocks that each separately equal -1. And there is 1 yellow block

158. calculus

Write and then solve for y = f(x) the differential equation for the statement: "The rate of change of y with respect to x is inversely proportional to y^4."

159. Math

What is the rule for the function shown in the table? x: -1 | 0 | 1 | 2 y: -2 | 1 | 4 | 7 A. y= 1/3x + 1 B. y=3x + 1 C. y= 1/3x D. y= 1/3x + 1 Will someone please help and explain how I can work this out. I have trouble with these.

160. Math help!

Hilda has a rectangular garden by the river in front of her house. The area she uses for planting tomatoes is three times as large as that she uses for beets. If she has 270 yards of fencing material to enclose the garden to protect it fro, rodents, will

161. Math

1)If the roots of a quadratic equation are -2 and 3, the equation can be written as A) (x+2)(x+3) B) (x-2)(x+3)** C) (x+2)(x-2) D) (x-2)(x-3) Is the answer B? If someone could help me that would be great.

162. Algebra

A gutter at the edge of a roof drops 2 inches for every 30 feet of length. To the nearest tenth of a degree, what is the measure of the angle that the gutter makes with the roof? Is it 15?

163. chemistry

Calculate the concentrations of all ions after 50.0 mL of a 0.100 M AgNO3 solution is mixed with 100.0 mL of a 1.00 M Na2SO4 solution.For Ag2SO4 Ksp = 1.2 x 10-5 Do I first do MiVi=MfVf and then using the two concentrations I use ksp value? I'm just so

164. Math

Use the binomial probability to solve. Basketball Suppose you make 90% of your free throws and you attempt 3 free throws. Use the Binomial Theorem to calculate each probability. a. You do not make any of them. - I have this one b. You only make 1 of them.

1) Given that p(-3), p(-1), and p(5)=0, which expression could be p(x)? A)x^3-x^2-17x-15 B)x^3+x^2-17x+15 C)x^3-3x^2-13x+15** D)x^3-9x^2+23x-15 2) Coaches in a football conference had the option to vote for or against a rule change. The table below shows

166. biology

A toxin from a poisonous mushroom has been identified as a hydrophobic weak acid. It somehow can find its way to the inner membrane of mitochondria where it gets protonated on the outer surface of the membrane but deprotonated on the inner surface of the

167. Chemistry

Calculate OH and H pH= 12 How to set this up

168. Math

1) Malene rented a compact car for 10 days and drove it 620 miles for a total cost of 412\$. Patrick rented a compact car at the same rental car company for 6 days and drove it 850 miles. His total cost was 295. Which system of equations could be used to

169. math

triangle abc has coordinates a -1,1 b 1,1 c 0,-1 triangle xyz will be a dilation of triangle abc with a scale factor of 3 at what coordinates should point x of triangle xyz be plotted

170. Math

How do you tell whether a number is a perfect square from the exponents of its prime factorization? Explain why this works.

171. chemistry

the acid dissociation constant of dichloroethanoic acid is 0.033 . calculate the concentrations of hydrogen ions

172. geography

What are the five posive impacts of the economic developments. thanks in advance

173. English

1. I want to help Mohamed look for my school's gym. 2. I want to help Mohamed look for my school gym. 3. I want to help Mohamed look for the gym of our school. 4. I want to help Mohamed look for the gym of my school. ================ Which ones are

174. Algebra

Jonas purchased a new car for \$25,000. Each year the value of the car depreciates by 20% of its value the previous year. In how many years will the car be worth \$5000?

175. Physics

What is the velocity of an object that is dropped from a height of 20m,just before it reaches the ground?

176. math

The graph of a second-order polynomial is shown below, and the intercepts with the axes are marked. Explain how you can use the graph to write the polynomial as a product of linear factors (x-a)(x-b). Be sure to state the values of a and b.

177. math

Show that the twenty-first,thirty-seventh and sixty-fifth term of a linear sequnce are consecutive terms of an exponential sequnce whose common ratio is 7/4

178. History

1.Which 19th century movements were most associated with each another? A- Socialism and imperialism B- Transcendentalism and utopianism C- abolitionism and manifest destiny D- romanticism and democratic-republicanism 2.The writings of Transcendentalists

179. physics

A uniform plank of seesaw is 5meter long.a boy weighing40kgf sits 1.5meter from the one end.what will be the distance of a girl weighing 25kgf sit at other end,so as to balance the seesaw.

180. Math

A gutter at the edge of a roof drops 2 inches for every 30 feet of length. To the nearest tenth of a degree, what is the measure of the angle that the gutter makes with the roof? I got an answer before, but where does 12 come from?

181. Math

For what whole number values of length and width will the rectangle have an area of 60 square yards and I'm perimeter of 38 yards?

182. Mathematics

Solve for x: (385)^2 - x^2 = (760.35)^2 - (637.4 - x)^2

183. Math

The areas of the rectangular faces of the box are shown( 90 in.², 60 in.², & 54 in.²). What is the volume of the box?

184. English

Hello. I'll really appreciate it if you help me with a few questions. 1)Is the article used in the context "I am late for the (?) class"? 2) What is a natural way to ask a question the answer to which will be "twenty minutes, I am 20 minutes late for

185. Plagarism

How did your approach differ when writing each citation type?

186. Molar mass

A sample of gas has a mass of 0.580g . Its volume is 119mL at a temperature of 80∘C and a pressure of 743mmHg . Find the molar mass of the gas. I think I got a step wrong in the problem, please help?

187. science

Could you please check my answers? Question one: When evolution was first proposed, which of the following was used as evidence as support? A. Observations of nature. B. lab experiments. C. extensive fossil collections, D. genetic sequences. I chose answer

188. MATH

Jenna always throws loose change into a pencil holder on desk and takes it out every 2 weeks. this time it is all nickels and dimes. There are 7 times as many dimes as nickels and the value of the dimes is \$6.50 more than the value of the nickels. How many

189. ALGEBRA

Find the distance between the points (-2, 3) and (4, -5)

190. Math

Is 2^9 * 3^12 * 5^6 * 7^3 a perfect cube? How do you know by just looking at it?