# Questions Asked onApril 28, 2013

1. ## statistics

the probability that a house in an urban area will develop a leak is 5%. if 23 houses are randomly selected, what is the probability that none of the houses will develop a leak?

2. ## 7th Grade Math for Steve.. or Ms. Sue

Determine whether each sequence is arithmetic or geometric. Find the next three terms. 1. 14, 19, 24, 29, . . . (1 point) geometric, 34, 39, 44 arithmetic, 32, 36, 41 arithmetic, 34, 39, 44 ** The sequence is neither geometric nor arithmetic. 2. –4, 8,

3. ## hiv/aids management)

given the constraints of budgets and time,schools are advised not to educate children on health and nutrition.Do you agree with the statement?justify your answer(25marks)

4. ## maths

Insert three geometric means between 1 and 81.

5. ## chem (boyles and charles law)

A helium filled balloon has a volume of 2.75L at 20 celsius .The volume of the balloon decreases to 2.46L after it is placed outside on a cold day.What is the outside temperature in celsius?

6. ## math

one company charges \$6.95 per shirt plus a setup fee of \$43. Another company charges \$8.40 per shirt plus a \$58 set up fee. for what number of shirts would the total be the same?

7. ## Phys

A surgeon is using material from a donated heart to repair a patient's damaged aorta and needs to know the elastic characteristics of this aortal material. Tests performed on a 16.0 cm strip of the donated aorta reveal that it stretches 3.16 cm when a 1.60

8. ## physics

two people carry a heavy electric motor by placing it on a light board 2m long.one person lifts at one end with a force of 700N, and the other lifts the opposite end with a force of 400N.Calculate the weight of the motor and determine where its center of

9. ## chemistry (charles law)

1.)A ballon is filled with 3.0L of helium at 310k.The balloon is placed in an oven where the temputure reaches 340k.what is the new volume of the ballon?

10. ## chemistry (charles law)

A 4.0L sample of methane gas is collected at 30.0 celcius .predict the volume of the sample at 0 celcius.

11. ## Physics

You need to produce a solenoid that has an inductance of 2.51 μH . You construct the solenoid by uniformly winding 1.17 m of thin wire around a tube. How long, in centimeters, should the tube be?

12. ## Chemistry-Pressure

The wastewater solution from a factory containing high levels of salts needs to be diluted before it can be released into the environment. Therefore, two containers of waste solution are separated by a semipermeable membrane and pressure is applied to one

13. ## Physics

A park ranger wants to shoot a monkey hanging from a branch of a tree with a tranquilizing dart. The ranger aims directly at the monkey, not realizing that the dart will follow a parabolic path and thus will fall below the monkey. The monkey, however, sees

14. ## chem

How many moles of potassium iodide, KI, are required to precipitate all of the lead(II) ion from 25.0 mL of a 1.6 M Pb(NO3)2 solution? A. 0.020 mol B. 0.040 mol C. 0.080 mol D. 0.64 mol E. 64 mol

15. ## math

a company employs 12 gardeners at \$26 per day , and 8 clerks at \$17 per day. What is the mean daily wage,in dollars,of the 20 employees?

16. ## physics

a bullet of mass 0.015kg strikes a ballistic pendullum of mass 2kg.the centre of mass of the pendulum rises a verticle distance of 0.12m.assuming that the bullet remains embedded in the pendulum, calculate the bullets initial speed.(show all calculations

17. ## physics

a wheel radius 0.25 m is mounted on a frictionless horizontal axle. the moment of inertia of the wheel about the axis is 0.040. a light cord wrapped around the wheel supports the 0.50 kg of box. the wheel is released from the rest. what is the magnitude of

18. ## mathematics

find the 8th term of an A.P -3,-1,1

19. ## trigonometry

Peter has three sticks measuring 19 inches, 23 inches, and 27 inches. He lays form a triangle. Find the measure of the angle enclosed by the 19 inch and 23 insides to the nearest degree.

20. ## math

In a class of 50 students, 35 are Democrats, 17 are business majors, and 6 of the business majors are Democrats. If one student is randomly selected from the class, find the probability of choosing a Democrat or a business major.

21. ## Physics

A 39.0 kg box initially at rest is pushed 4.50 m along a rough, horizontal floor with a constant applied horizontal force of 135 N. If the coefficient of friction between box and floor is 0.300, find the following. (a) the work done by the applied force J

22. ## mathematics

what value of k makes the given expression a perfect square?M square -8m+k

23. ## chemistry

C3H8(g)+5O2(g)-->3CO2(g)+4H2O(l) what reactant is oxidized and which is reduced?

24. ## Science

Acetaldehyde, CH3CHO, will decompose into methane and carbon monoxide according to CH3CHO (g) -> CH4 (g) + CO (g) At 450C the rate of consumption of CH3CHO is measured to vary with the concetration of CH3CHO raised to the power 1.5. With a CH3CHO

25. ## chemistry

how many grams of CO are needed to react with an excess of Fe2O3 to produce 201.1 g Fe? Fe2o3(s) + 3CO(g) -> 3CO2(g) + 2Fe(s)

26. ## chemistry

The temperature of an ideal gas in a 5.00 L container originally at 1.01 bar pressure and 25 °C is lowered to 220 K. Calculate the new pressure of the gas.

27. ## maths

1.you visit thr Canyon and drop a penny off the edge of a cliff. The distance the penny will fall is 16 feet the first second, 48 feet the next second, 80 feet the third second,and so on in an arithmic sequence. What is the total distance the object will

28. ## chem. mix of boyles and charles law

The volume of a scuba tank is 10.0L.It containes a mixture of nitrogen and oxygen at 290.atm.what volume of this mixture could the tank supply to a diver at 2:40 atm?

29. ## life orientation

critically discuss five ways in which the environmental factor impacts on the community

30. ## Chemistry

A 1.50 L portion of 0.100M sulfamic acid, HSO3NH2, is placed in the bottom of a 10.0 L glass lined stainless steel chamber. A dish containing 17.25g of solid NaNO2 is floated on the acid. A thin open ended U tube containing a pool of liquid mercury is

31. ## science

A car is travelling at 20m/s along a road. a child runs out into road 50m ahead and car driver steps on break paddle. what must car retardation rate be if the car is to stop just before it reaches the child?????

32. ## Chemistry

A sample of gas is confined to a cylinder housed with a movable piston. Initially, the gas occupies a volume of 2.7 L at 6.0 atm and 25°C. Calculate the volume of the gas sample if the pressure is reduced to 1.8 atm and the temperature decreased to 20°C.

33. ## Physical Science

Four balls are taken to the top of a building. Ball 1 is dropped (zero initial velocity). Ball 2 is thrown straight up with a velocity of 3 m/s. Ball 3 is thrown straight out with a horizontal velocity of 3 m/s. Ball 4 is thrown straight down with a

34. ## thohoyandou secondury school

provide 8 ways in which you critically discuss how life style/behaviour of cancer disease impact on the teenager

35. ## Chemistry

A current of 2.34 A is delivered to an electrolytic cell for 85 minutes. How many grams of Au will be deposited from an aqueous solution of AuCl3?

36. ## accounting

Phil Phoenix is paid monthly. For the month of January of the current year, he earned a total of \$8,288. The FICA tax rate for social security is 6.2% and the FICA tax rate for Medicare is 1.45%. The FUTA tax rate is 0.8%, and the SUTA tax rate is 5.4%.

37. ## Calculus

Given the function: f(x) = x^2 + 1 / x^2 - 9 a)find y and x intercepts b) find the first derivative c) find any critical values d) find any local(relative) extrema e) find second derivative f) discuss the concavity g) find any inflection points Please show

38. ## chem

For the following combination of reactants, enter the formulae of the products in the space provided and give their states. (Separate multiple products with a comma ",". Type your answer using the format Na2SO4(aq) for Na2SO4(aq). Do not balance the

39. ## Eng B

1. When author Sarah Orne Jewett Writes That Sylvia Lives “hart to Heat” with nature, she means that the young girl A. Mistrusts her “dream of love.” B. Operates on instinct. C. It, literally, a woodland creature. D. Is most alive in the

40. ## Chemistry

A current of 2.34 A is delivered to an electrolytic cell for 85 minutes. How many grams of Au will be deposited from an aqueous solution of AuCl3?

41. ## physics

three point charges each of magnitude +q are located at the vertices of an equilateral triangle of side L. what magnitude of charge should be placed at the centroid of triangle to keep all the three charges in equilibrium?

42. ## chemistry

if 8.00 mol of NH3reacted with O2 how many moles of H2O will be produced? 4NH3(g) + 7O2(g) -> 4NO2 + 6H2O(g)

43. ## tigonometry

the end of a 40 inches pendulum describe an arc of 5 inches through what angle does the pendulum swing?

44. ## Engineering

A physics major is working to pay his college tuition by performing in a traveling carnival. He rides a motorcycle inside a hollow transparent plastic sphere. After gaining sufficient speed, he travels in a vertical circle with a radius of 13.4 . The

45. ## math

How do I solve these for x? 1) 1+2log5x=7 2) logaX=3/2loga9+loga2

46. ## Calculus

Given the function: f(x) = x^2 + 1 / x^2 - 9 a)find y and x intercepts b) find the first derivative c) find any critical values d) find any local(relative) extrema e) find second derivative f) discuss the concavity g) find any inflection points Please show

47. ## chemistry

a sample of molybdenum is analysed by x-ray diffraction using Nik(alpha) radiation. calculate value of angle of which the lowest angle of radiation is observed . answer in degrees.

48. ## Eng B

An author of detictive novel is most lkely to use figurative language to A. Entertain the reader. B. help the reader visualize a character. C. suggest hidden meanings. D. mislead the reader. Answer is "B"

49. ## chem (boyles and charles law)

A 1.00L balloon is filled with helium at 1.20 atm.If the balloon is sqeezed into a 0.500L beaker and doesnt burst ,what is the pressure of the helium?

50. ## chemistry

the youngs modulus for the steel is 20.7*10^10 N/m2,how much will a 2.5 mm diameter wire 12 cm long, be strained when it support a load of 450 N? express strain as decimal not a %

51. ## english.

“[R]emembering the rhythm” and “backs of buses” both contain examples of (1 point) alliteration. stanzas. rhyme. onomatopoeia. 2. Choose the option that corrects the sentence below. If the sentence is correct, select “d. The sentence is correct."

52. ## english.

3. Read the following stage directions from the end of Act 2 of The Diary of Anne Frank. [For a second ANNE stands looking up at PETER, longing for him to kiss her. As he makes no move she turns away. Then suddenly PETER grabs her awkwardly in his arms,

54. ## Algebra

A freight train leaves Chicago traveling West at 35 mph. An hour later a passenger train leaves Chicago traveling on a parallel track at 60 mph. How far from Chicago will the passenger train catch up to the freight train?

55. ## Life Orientation

Provide 5 ways in which you critically discuss behaviour impact on the teenager

56. ## chemistry

acetaldehyde Ch3Cho will decomposed into methane and CO according to Ch3Cho->ch4+Co at 450 C the rate consumption of Ch3cho is measured to vary with the concentrate of heliumCh3Cho raised to the power 1.5 with a Ch3Cho concentrate of 0.222 M ,the rate of

57. ## ap chemistry

We drop 50.5 grams of magnesium into 572 mL of a 3 M HCl solution. What is the maximum volume of dry hydrogen that could be produced by this reaction at STP?

58. ## algebra

linear equations 10-0.5y+-1.5x and y=0.5(6x+40)

59. ## physics

two people carry a heavy electric motor by placing it on a light board 2m long.one person lifts at one end with a force of 700N, and the other lifts the opposite end with a force of 400N.Calculate the weight of the motor and determine where its center of

60. ## physical science

The shape of water molecule is (A)tetrahedral (B)linear (C)angular (D)trigonal planar

61. ## math

Compound Interest Question James has 10,000 to invest. If he invest money in a savings account that pays 4% APR, calculate the following: a) how long will it take to have a total of 15,000 if interest is compounded quarterly (3months)? b)how much will he

62. ## chem

How many grams of TiCl4 are needed to produce 17.8 g of titanium? what equation do i use?

63. ## Physics

The boom weighs 2450 and is attached to a friction less pivot at its lower end. It is not uniform; the distance of its center of gravity from the pivot is 39.0% of its length. What is the tension in the guy wire? Link to picture of problem which is needed

64. ## stats

The percent of fat calories that a person that in America consumes each day is normallydistributed with a mean of 36 and a standard deviation of 10. Suppose that 16 individuals are randomly chosen for an experiment. 1. Completely describe the distribution

65. ## Chemistry

Aluminium react with oxygen to form aluminium oxide.how many grams of potassium chlorate V would be heated to produce enough oxygen to form 5.1grams of aluminium oxide

66. ## physics

two people carry a heavy electric motor by placing it on a light board 2m long.one person lifts at one end with a force of 700N, and the other lifts the opposite end with a force of 400N.Calculate the weight of the motor and determine where its center of

8. At TelePower Plus, long-distance phone calls to China cost \$0.59 for the first minute and \$0.25 for each additional minute, plus an additional roaming charge of \$2.50. If the total charge of a call to Beijing was \$11.84, how many minutes did the call

68. ## trig

at one point in the day, a tower that is 150 feet high casts a shadow that is 210 feet long. Find, to the nearest tenth of a degree, the angle of elevation of the sun at that point

69. ## math

The volume V of a pyramid varies jointly as the area of the 1. ________________________ base B and the height h, and V=24 ft3 when B=12 ft2 and h=6ft. Find B when V=54 ft3 and h=9 ft.

70. ## life orientation

Identify and describe three environmental issues that cause ill health, crisis and disasters

71. ## School (Plz read, really important)

Am I eligible to get a President's Award for Educational Excellence or the President's Award for Educational Achievement and Daughters of the American Revolution??? Here are my grades from last year and this year so far and everything else I accomplish:

72. ## chemistry

why does MgO has a higher boiling and melting point than NaCl?

73. ## english.

1. Read the following stanza from “Alone”: Lying, thinking Last night How to find my soul a home Where water is not thirsty And bread loaf is not stone I came up with one thing And I don’t believe I’m wrong That nobody, But nobody Can make it out

74. ## Math

James has 10,000 to invest. If he invest money in a savings account that pays 4% APR, calculate the following: a) how long will it take to have a total of 15,000 if interest is compounded quarterly (3months)? b)how much will he have after 7yrs if interest

75. ## chemistry

The following reaction was carried out in a 2.00 reaction vessel at 1100 : C+H2O -> C)+H2 If during the course of the reaction, the vessel is found to contain 7.00mol of C, 13.3mol of H2o, 3.80mol of CO, and 7.20mol of H2, what is the reaction quotient ?

76. ## physics

Consider two straight bars of uniform cross section made of the same material. Bar 1 has an axial length of and a square cross section with side length . Bar 2 has an axial length of and a round cross section with diameter. When subjected to axial tension,

77. ## physics

In order for me to fill the table of equilibrium, how do I calculate change(mol) Please give me in detail about filling the table

78. ## Physics Electricity and magnetism

A current with sinusoidal time-dependence, whose peak value is 3.55 A and frequency is 463 cycles per second, passes through a long straight wire. A rectangular 72.2 cm × 32.5 cm loop of copper wire is located 80.2 cm from the wire and is coplanar with

79. ## life science

Write an assay to briefley explain how geographic isolation of a common ancestral species of finches has led to the development of 14 different species of finches in the galapagos islands

80. ## Physics

To combat wasteful habits, we often speak of “conserving energy,” by which we mean turning off lights, heating or cooling systems, and hot water when not being used. In this chapter, we also speak of “energy conservation.” Distinguish between these

81. ## chemistry

N Type silicon has been produced by doping with (P).the charge carrier population based on electrical conductivity measurement is determined to be 3.091*10^17 carriers/cm3 at room temperature. calculate doping level of P (how much P has been added to the

82. ## math

between 8pm and 9pm the station broadcasts 8 min of commercials. What is the ratio of commercial time to noncomercial time during the hour? would it be 13:15

83. ## Science

The density of ethanol is 0.789 g/cm3 at 20 degrees celsius. What is the mass of 150cm3 of this alcohol?

84. ## thermodynamics

If a carnot engine receives heat from a heat source and discharge 1000J to a heat sink at temperature of 27C in each cycle, calculate the heat received and the work performed by the engine in each cycle

85. ## Algebra

How do you graph the equation of -1.2x + 2y= -4 and y = 0.6x + 8

86. ## physis

A ball of mass 80kg falls from rest from a height of 100m.neglecting air resistance, calculate it K.E after falling a distance of 30cm

87. ## Language Arts

The word survivor comes from the Latin root vivere, meaning "to live." Which of the following words does not share the same origin? (1 point) vivid revive divide vitality My Answer: 1)C Is this correct?

88. ## chemistry (Pls Bob check for me)

Aspirin c9h8oh molar mass = 180.1g/mol can be prepared by the reaction of salicylic acid c7h603 molar mass = 13801 g/mol with acetic anhydride c6h603, according to the following equation. A chemist starts with 2 gram of salicylic acid reacts it with excess

89. ## Physics

Calculate d energy of d 3rd level of an atom if d ground state energy is -24.8ev

90. ## Algebra

Hearst Castle is 180 miles from Ventura by road. Two coaches leave Ventura at the same time, both heading for Hearst Castle, but one averages 5 mph faster than the other. If the faster coach reaches Hearst Castle half an hour earlier than the slower coach,

91. ## Trigonometry

a skater skates along a straigh path from point A to point . Two streets that intersect a point C also intersect the path at points A and B. Street AC is 0.4 miles and street BC is 1.3 miles. The included angles at c is 107 . How far did the skater skate

92. ## chemistry

Calculate the density of atoms in (011) in lithium (Li). Express your answer in units of atoms/cm2.

93. ## chemistry

to reduce loss of helium , a pressure vessel is lined with a membrane made of tantalum.the concentrate of helium at the inner surface of the membrane is held constant at 4.44*10^-5kg/cm3, which the concentrate at the outer surface of the membrane is held

94. ## calculusiii

Let S be the part of the sphere x^2 + y^2 + z^2 = 25 that lies above the plane z = 4. Let S have constant density k. (a) Find the center of mass. (b) Find the moment of inertia about the z-axis.

95. ## math

jason and jenny went to see the movie Vampires From Mars. Jason told his mother, " The movie starts at 1:15 p.m. and is 2 hours and 56 minutes long, so it will end at 5:11 p.m. Please pick us up then." What was jasons mistake and how can it be fixed.

96. ## lifeorientation

two institution that involved in supporting or giving redress to these disaster of Hiv and Aids

97. ## chemistry

Finding out if the amount of heat produced depends on an increase in the concentration of Hcl

98. ## chemistry

calculate density of atoms in(001) in Lithium answer in units of atoms/cm2

99. ## stats

Identify the direction and all possible interpretations of each of the following correlations. Be sure to identify each example as positive, negative, or zero (not correlated). Then give all possible causal interpretations for the results. Many students in

100. ## 5th grade math (word problems)

Maria is packaging boxes into a carton that is 4 in. x 6 in. x 3 in. THe boxes are 2 in. x 1 in. x 1 in. How many boxes will fit in the carton? I'm not sure how to solve. I know volume = l x w x h. The carton has volume of 72 cubic inches (4 x 6 x 3). THe

101. ## Calculus

Consider the function f(x)=4(x−3^2/3. For this function there are two important intervals: (−‡,A) and (A,‡) where A is a critical number. Find A

102. ## chemistry

A specimen of LaNi5 containing hydrogen is placed in a vacuum furnace. After 1 hour, at what depth from the surface of the specimen has the concentration of hydrogen reached 1/3 the initial concentration? The diffusion coefficient of hydrogen in the alloy

103. ## maths

find a6 for an arithmetic sequence where a1=3x+1 and d=2x+6. 2.A display of cans on a grocery shelf consists of 20 cans on the botton, 18 cans inthe next row, and so on in an arithmic sequence, until the to[p row has four cans. how many cans , in total,

104. ## math

Jason uses his car for his job. He is allowed to depreciate the car 7% per year. IF the car was worth \$23,000 new, in about how many years will the car be worth \$3,000?

105. ## physics

Two identical wires with resistance,R and mass,m rest on two smooth parallel superconducting (zero resistance) rails. Initially, they are separated by a distance,D=70 cm. Suddenly, a uniform magnetic field B, perpendicular to the plane of the rails is

106. ## physics

A ball hands on a string in the bus from the rear-view mirror. Once the driver hits the gas pedal, and while he accelerates, the ball no longer hangs straight down, but instead make an angle è of 15 degrees with respect to the vertical. How fast is the

107. ## Chemistry

If 10.5 g of hydrogen,H2, were mixed with 6.51 g of acetylene, C2H2, and allowed to react according to the following equation, what is the theoretical yield of ethane, C2H6, produced? If 7.00 g of ethane, C2H6, were recovered at the end of the reaction,

108. ## economics

Help me reword this?? The Fed is organized as a corporation, owned by its member banks, and directed by a government-appointed board. Monetary policy affects the size of the money supply and the level of interest rates. The first "tool" of monetary

109. ## algebra

What are the increasing and decreasing intervals for the equation y=x^2-2x-15

110. ## History

Well I have been working on an essay for a couple days now about slavery, here it is: Slavery began in the 16th century, but ended in the 19th century. Slaves went through a lot of torture then, but some blacks now still deal with some of the problems the

111. ## 5 th grade math

pilar has 4 marbles in a bag .they are green,red,blue,and yellow.she chooses a marble without looking,replaces it,and then chooses another marble.if she wants to get a green marble exactly 1 time out out of the 2 draws,how many favorable outcomes are

112. ## chemistry

a chemical analysis that silicon crystal weighing 100 gm containing 16.5 mg of aluminium which is substitutionally incorporated (the aluminium atoms replaced some of the silicon atom) what is the number of extrinsic charge carriers in this crystals? answer

113. ## zonkizizwe secondary

Write an assay to briefley explain how geographic isolation of a common ancestral species of finches has led to the development of 14 different species of finches in the galapagos islands

114. ## calculus

find the absolute minimum and maximum valies of f(x)=-x^4+2x^3+5 on the interval [-2,2]

115. ## chemistry

If 13.5 ml of concentrated (17.0 M) of sulfuric acid was spilled on the chemistry counter, calculate the mass of sodium bicarbonate needed to neutralize the acid

116. ## Biology

In lactic acid fermentation, ______ is _______ a) lactate...oxidized b) pyruvate...reduced c) ethanol...oxidized d) NAD+...oxidized e) NADH...reduced

117. ## ACCT 2100

The bookkeeper for Andy’s Country Music Bar went insane and left this incomplete balance sheet. Andy’s working capital is \$95,000 and its debt to assets ratio is 40 percent. Required: Complete the balance sheet by supplying the missing amounts. (Round

I really don't get this... I don't see a yearly payment option in table to compare to the yearly in the problem? Mike Reno, age 44, saw an Insurance Solutions Direct advertisement stating that its \$500,000 term policy costs \$395 per year. Compare this to

119. ## math

find the radius and height of a cylindrical soda can with a volume of 21in^3 that minimize the surface area.

120. ## life orientation

Identify and describe 3 environmental health hazards that cause ill health, accidents crises, and disaster within your community within South Africa and globally. Include evidence that is current of the identified issues

121. ## PHYSICS!!!! help!!!

A perfectly spherical, but squishable ball of radius 10 cm is blown up to an internal pressure of 2 atm. The ball is placed between two perfectly vertical walls and the walls are slowly squeezed together. Initially the ball slips down the walls, but when

122. ## English

1. If you are filled with anticipation about an event, you are (1 point) ***looking forward to it. planning to avoid it. hoping to delay it. 2. Read the following excerpt from Sky: We finally reached Enkhuizen, an ancient harbor town, where the brisk wind

123. ## chemistry

consider an x-ray tube with a Cun anode and a monochromator consisting of a Ni single crystal with (111) planes parallel to surface of crystal. what is the lowest voltage capable of producing X-rays trough a monochromator ? answer in V.

124. ## science

How many grams of water, H(subscript 2)O, and propene, C(subscript 3)H(subscript 6), can be formed from the reaction of 6.0 g of 2-propanol, C(subscript 3)H(subscript 8)O?

125. ## Spanish

I have to do a menu for a restaurant in Spanish but I don't know how I say the name for my restaurant in Spanish. How would I say, "The Poinsettia Mexican Restaurant" in Spanish?

126. ## physics

a rocket is fire vertically and ascends with constant vertical axceleration of 20 m/s^2 for 1min. its fuel is then all used and it continues to move as a free falling bodyn neglexting rhe variation of g altitude, compute a) the max altitude reached by the

127. ## math

A standard die is rolled three times. What is the probability that a prime number is rolled on exactly one of the three rolls?

128. ## life orientation

Discuss in a paragraph of 150 words ways in which one can take responsibility to provide safe and heAlth environment through floods

129. ## Physics

To combat wasteful habits, we often speak of “conserving energy,” by which we mean turning off lights, heating or cooling systems, and hot water when not being used. In this chapter, we also speak of “energy conservation.” Distinguish between these

130. ## maths

Find the indicated sum n sigma k=1 4(0.5)^k

131. ## math

verify that the function satisfies the hypotheses of the mean values theorem on the given interval. then find all numbers c in the given interval that satisfy the conclusion of the mean value theorem. f(x)=2x/x4 [0,3]

132. ## life orientation

Identify and describe 3 environmental health hazards that causes ill health, accidents,crises, and disaster within your community or any other community within South Africa and globally. Include evidence that is current of the identified issues

133. ## algebra 2 ap

Jason uses his car for his job. He is allowed to depreciate the car 7% per year. IF the car was worth \$23,000 new, in about how many years will the car be worth \$3,000?

134. ## CRC

A sample of ideal gas is in a sealed container. The pressure of the gas is 675torr , and the temperature is 28\, ^{\circ}C . If the temperature changes to 91\, ^{\circ}C with no change in volume or amount of gas, what is the new pressure, P_2, of the gas

135. ## Eng B

Which of the words in parenthesis in the following sentences is most likely to convey a denotative main? A. What (time) did he call? B. Do you know what the (owl) signifies? C. Deliver the (goods) soon, or else D. The recipe calls for one pint of (cream).

136. ## Chemistry

Hydrogen bromide gas, a polar covalent compound, is very soluble in water. Describe what happens, referring to intermolecular forces, as the hydrogen bromide dissolves. Diagrams may be helpful in your explanation. Please, I need help with this question for

137. ## Calculus

Find dy/dx by implicit differentiation for x^2 - 2xy + y^3 = C

138. ## Math

Inductive reasoning please determine the next three numbers in patern 15,5,5/3, 5/9, , , ,

139. ## Biochemistry

Calculate the ATPs resulting from the total oxidation of the following compounds: a. Fructose-6-phosphate b. 3-Phosphoglycerate c. Succinyl-CoA d. Stearic acid How do I begin?

140. ## math

a man pays 60 cents for every 200m3 of gas used,plus a fixed charge of \$13.75. How much does he pay when he uses 55 000m3 of gas?

141. ## Math

suppose you put one bacterium on a petri plate containing a suitable medium at a favorable temperature. If after 6 hours you found there to be 40 bacterium. What would be its exact double time to the nearest minute?

142. ## chemistry

Finding out if the amount of heat produced depends on an increase in the concentration of Hcl

143. ## microeconomics

If aggregate demand for a product is Qd = 600 – 20P and supplys Qs = 304 + 12P, what would be (1) the equilibrium price and (2) the equilibrium quantity? Also (3) prepare a well calibrated graph illustrating Qd and Qs. Placeprice on the vertical axis and

144. ## Math

i need an example problem using log10E=11.4+1.5m when E means radiated energy and m is means magnitude. the log has a base of 10 that's why the 10 is there. please help!!! Again, need an example problem relating it to earthquakes

145. ## life orientation

Identify and describe 3 environmental health hazards that cause ill health, accidents crises, and disaster within your community within South Africa and globally. Include evidence that is current of the identified issues

146. ## population,poverty and human development(hiv/aids

"the larger a population,the higher the levels of poverty'.Do you agree with statement?justify your response.25marks

147. ## Physics

Wat is d bond between silicon and germanium

148. ## Life Orientation

Describe the life style disease/behaviour and explain5 or more factors that contribute to the disease.

149. ## physical sciences

plan,design and conduct an investigation to find out wether the amount of heat produced will depend on an increase on the concentration of HCL when HCL reacts with an excess Zn

150. ## chemistry

Which of the following will increase the strength of a sample of 90% SiO2 - 10% MgO Quench the entire sample in water Quench half of the sample in water Cool the entire sample with air jets Cool half the sample with air Submerge the sample in a salt bath

151. ## Geometry

How do u find the lateral area of a 3-sided 1-based triangle with a slant height of 7 and a height of 5?

152. ## life orientantion

Identify and describe 3 environmental health hazards that cause ill health,crises and disaster

153. ## Life orintation

Explain 5 factors that contribute to the disease HIV AIDS

Suppose p(x)=ax^2+bx+c is a quadratic polynomial satisfying p(7)−p(3)=214. Determine the value of p(9)−p(1).

155. ## Agricultural science

Outline and explain the objectives o fencing a farmland

156. ## Stats

According to genetic theory, every plant of a particular species has a 25% chance of being red-flowering, independently of all other plants. Among 10 plants of this species, what is the chance that fewer than 4 are red-flowering?

157. ## algebra1

6x+2/3x+3 division sign 2x-2/4x+4

158. ## Life orientation

Critically discuss 10 ways in which the environmetal health hazards can impact negatively on one's health

159. ## chemistry

the energy of vacancy formation in palladium is 1.5 eV.at 888 C there is one vacancy formation for every million (10^6) atoms sites. what temperature would be achieved a vacancy fraction of one for every thousand (10^3)atoms sites?

160. ## math

what is the smallest perimeter possible for a rectangle whose area is 1000in^2 and what are its dimensions?

161. ## Physics

An trapdoor is 0.91 m square, has a mass of 11 kg, and is hinged along one side with a latch on the opposite side. If the center of mass is located 0.1 m toward the hinged side from the center, what are the magnitudes of the forces on the latch and the

162. ## College Algebra and Number Theory

SETS Let S1, ... , Sn be sets satisfying the following condition: Sj ¡ö Sj+1 for all 1 ¡ i ¡ n - 1. Find S1 ¡û S2 ¡û¡¦ ¡ûSn and S1 ¡ú S2 ¡ú ¡¦ ¡ú Sn

163. ## science

a boat weights 10,000 newtons what is the magnitude of buoyant force acting on boat in the fliud

164. ## Life orientation

In 10-15 lines critically discuss 5 ways in which the human or environmental problem impacts on the community.

165. ## Literature

Which of the words in parenthesis in the following sentences is most likely to convey a denotative main? A. What (time) did he call? B. Do you know what the (owl) signifies? C. Deliver the (goods) soon, or else D. The recipe calls for one pint of (cream).

166. ## microeconomics

The Consumer Price Index (CPI) for the year 2012 is 2.412 and the retail price per bushel for corn is \$US12.06. Using 1992 as the base year (I.e CPI is 100) by how much would the real price for corn have risen or fallen if the retail price for corn in 1992

167. ## geometry

WHAT IS ad TO THE NEAREST 10 ON A KITE WHEN THE KITE IS22,7, AND 12

168. ## math, duhhh!

New flat- screen tvs flash even faster than older tvs. Since dogs need a flicker freqency rate of 75, dogtv works as intended only on newer tvs. One type of new tvs flash 500 frames each second. How many moreframes does it flash than an older tv with a

169. ## math

Initially two painters are available to paint a picket fence. Peter alone could paint the fence in 6 hours; Pat alone in 3 hours. It is decided that they will work simultaneously to paint the fence. Before they start, however, along comes Mary, who alone

170. ## life orientation

five ways in which the human or environmental impact fire on the community

171. ## math

ellen bought 4 1/4 yards of fabric for \$3.25 per yard. how much was ellen charged for this fabric. I know 4x 3.25 is 13.00 dollars so far how do I get the rest solved help I have a bunch more like this

172. ## Chem

If you need 2.74 moles of acetic acid how many liters of your vineger must you take

173. ## HCS/212

7. Have you personally or professionally noticed any changes in the way health care information or services are researched or accessed? Explain your response. 8. Are you finding that there is an increase or a decrease in options for finding or researching

174. ## Algebra

How do you factor ax^2+bx+c? I'm so confused. I remember my teacher saying to use the discriminant b^2-4ac but when I do find the answer what do I next? Please help! For ex. Factor the trinomial if possible. If it cannot be factored, write not factorable.

175. ## maths

A deck of cards consists of 8 blue cards and 5 white cards. A simple random sample (random draws without replacement) of 6 cards is selected. What is the chance that one of the colors appears twice as many times as the other?

176. ## St Micheal

72 identical square tiles how many tiles are there along the length and width of the rectangle give two pairs of possible values

177. ## life oriantation

Critically discuss 10 ways in which the environmental health hazard can impact negatively on one's health

178. ## algebra1

he drove an average of 50 mph for 6 h for the 1st 4 hours he drove 47 mph what was his speed for the ast 2 hours

179. ## Corporate Finance

Your firm is looking at 3 projects, each costing \$500,000: A is estimated to save \$125,000 per year for 5 years; B is estimated to save \$75,000 for 6 years plus generate tax savings of \$20,000 per year; C is estimated to save \$75,000 per year for 10 years

180. ## economics

what's the difference between buying rate and selling rate?

181. ## math

barry buys a rug that is 35 inches by 4 feet.what is the area of the rug?

182. ## Math

If a 12ft tree casts a 17ft shadow, what tree height will cast a 28 ft shadow?

183. ## Agricultural science

What are the important features of a building which could be used as a milking shed (parlour), dairy (milk room) and food store to ensure production of clean fresh milk?

184. ## Life orientation

In 10-15 lines critically discuss 5 ways in which the environmental problem impacts on the community-lack of infrastructure

185. ## physics

Construct a 5th mode standing wave on a string that has an unknown mass hanging from one end. The distance between fixed ends of the string is 0.9 meters. If the wave speed on the 1.3 meter string is 216 meters per seconds and the string has a mass of 3

186. ## algebra

how do you do the linear equation y + 9 =1/5x and 45 - 3y = 15x

187. ## American History

After 1815 travel was greatly improved by all of the following Except: a.) Construction of canals that made shipping of goods faster and less expensive b.)by 1820 a national railroad network that encompassed over 150,000 miles of railroad had developed

188. ## science

a 100 pound life guard dives underwater to save a 150 pound person who is drowning the life guard will be able to lift the person to the surface because a:the buoyant force acts as an upward force on the person b:the force of gravity is less in water c:the

189. ## community development(hiv/aids management)

"effective leadership of a community that is dominated by one religion cannot be undertaken by a leader or a team that is of a different religion".Do you agree with this statement?justify your answer.(25marks)

190. ## chemistry

How to compare the melting point of two ionic bod or two covalent bond?

191. ## Stats

1. If you were to receive \$3 for every time a 7 or 11 was rolled with two fair dice and lost \$1 for all the ther values, what is the expected value (mean) for you as a gambler in this experiment? (please show work so I know how to do it). 2. Going with the

192. ## Life Orientation

Describe the life style disease cancer and explain 5 factors that contribute to the disease

193. ## math

ms kim is assigning each student in her class one of the fifty us states on which to write a report. What is the probability that jan will be assigned one of the 5 states that has a coastline on the pacific ocean? express the probability ratio as a

194. ## math

I am a rectangle one side length is 1.4 yards. My area is 9 square yards. What is the length of my other side?

195. ## math

Wayne will get \$4200 if his salary is increase by 20%.Wayne's salary is 40% less the barry.Find Barry's salary.

196. ## Quotient

Reasonableness.Lorraine divided 3,270 / 3 = 190.Is lorraines quotient reaonable?explain why or why not.

197. ## Life Orientation

Eight ways in which waste dumps impacts within communities

198. ## maths

kindly calculate the amount of money I would have in the bank at the end of 1 year if I invest 56000 at 3%. interest is paid annually

52*10E-10Kg

200. ## English

1.) We hung makeshift curtains in our room using (1point) A. Bed sheets. B. Old Curtains. C. New Curtains. 2.) Which of the sentences below is punctuated correctly? A. I opened the door and my cat ran outside. B. I opened the door, and my cat ran outside.

201. ## logic

1. Which of the following may not qualify as a falsifiable claim? (Points : 1) Your luck will improve. Your house will be sold tomorrow. Granite is more dense than sand. Smoking may cause heart disease.

202. ## calculus

find the absolute minimum and maximum values of f(x)=x^(1/3) (3+x) on the interval [-2,1]

203. ## L.o

Identify nd describe 3 environmental health hazards that cause ill health,crises nd disasters in south africa?

204. ## life orentation

discribe the lifestyle disease/behaviour.mation 5 or more factor

205. ## Accounting

On an Organizatrional charet, span of control refer to the

206. ## science

what are the changes of statein which energy is increased

207. ## algebra

6x+2/3x+3 division sign 2x-2/4x+4

4x-3y=24

209. ## life orientation

5 ways in which human or environmental problem on the health

210. ## Physical Education

Is a drug a food?

211. ## science

A sandstone observed in the field contains well-sorted, well-rounded, fine pitted and reddened grains. What does this tell you about the process that led to the deposition of this rock and the environment in which it formed? Please give your answer as a

212. ## Math

Solve the following system: 4x-y+z=6 2x+y+2z=3 3x-2y+z=3 Find the values for x, y, and z

213. ## chemistry (Pls Bob check for me)

what mass of 25% ba(n03)2 solution contain 40 grams of ba(n03)2 ? Answer 160g My calculation 40g/261.37g/mol = 0.15305/0.25g = 0.612 This answer is not right Who helps

214. ## early childhood education

States must search for and locate children with disabilities through: A. Child Find. B. Zero Reject. C. Due Process. D. Appropriate Education.

215. ## life orientation

People could you help me identify And describe 3 environmental health Hazards that cause ill health please

216. ## literacy

which of the following ways of incorporating an idea from a journal article into your research paper is considered best for expressing that entire idea in your own words

217. ## History/English

what does anti colonialist movements outside of america have to do with segregation?

218. ## Math

How to figure out 4x+9=1234

219. ## chemist

What is the concentration of the hydroxide ion in a solution if 0.12 mol of strontium hydroxide are dissolved in water and the final solution volume is 500. mL?

220. ## hiv/aids management)

discussthe history of hiv/aids,and development and the spread of hiv/aids virus global

221. ## socials

what is the capital of canada

222. ## math

there is a 20% chance that it will snow on tuesday and a 50% chance that it will snow on Wednesday. what is the probabilty that it will snow on either day?

223. ## hiv/aids management)

explain in no more than 500 words the history of the development and spread of the HIV/AIDS globally

224. ## dimani agriculrural high school

describe leukemia and explain factors that contribute to the disease

225. ## math

Wayne will get \$4200 if his salary is increase by 20%.Wayne's salary is 40% less the barry.Find Barry's salary.

226. ## math

Wayne will get \$4200 if his salary is increase by 20%.Wayne's salary is 40% less the barry.Find Barry's salary.

227. ## Life orientation

5 ways in which the human or environmental problem impacts on the community

228. ## Math

A machine produces a voltage in the following formula V(t) = 300cos(10(pi)x). X is the time in seconds. Graph the function with the restriction 0 < X < 1

229. ## math

solve for x a) 9^x+1=3^4x+5 b) 7^x=25

230. ## math

3x-4y=-6 2x+6y=11

231. ## life orientation

5 ways in which the human or environmental problem impacts on the community?

232. ## Pre-Algebra

x+8/7 - x+3/7

233. ## math

least to greatest 1/8,1/10,1/7