# Questions Asked onSeptember 26, 2011

1. ## physics

An object with mass m1=5.00 kg rests on a frictionless horizontal table and is connected to a cable that passes over a pulley and is then fastened to a hanging object with mass m2= 10.0 kg. Find the acceleration of each object and the tension in the cable.

What is the oxidation number of sulfur (s) in NaHSO3? I know that Na is 1 but I do not know what else to do. Please explain, thank you for your help!!

3. ## AP Chemistry

The structural formula for acetic acid is CH3CO2H. What is its empirical formula; what is its molecular formula?

4. ## calculus

Let P= (V^2)R / (R+r)^2 Calculate dP/dr, assuming that r is variable and R is constant.

5. ## geometry

If AB = 6, ST = 8, AC = 12, A = 40°, T = 20°, then find the length of RS.

6. ## Physical Science

1. A silver bar 0.125 meter long is subjected to a temperature change from 200C to 100C. What will be the length of the bar after the temperature? A. 0.124764 meter (MY ANSWER) B. 0.00023635 meter C. 0.00002363 meter D. 0.0000189 meter 2. When the

7. ## math

Reasonableness Sun-Yi estimated 270+146 and got 300. Is her estimate resonable? Explain.

8. ## Chemistry

How many grams of SO3 are produced when 20 g FeS2 reacts with 16g O2 according to the balanced equation? 4FeS2(s)+15 O2(g)>>>2Fe2O3+8SO3(g)

9. ## Chemistry

for the equilibrium, SbCl3 (s)+H2O SbOCl(s)+ 2HCl (aq)... A.) what reagent would you add to the system to dissolve SbOCl? B.) what reagent would you add to precitiate SbOCl? Help! would i use H2O to dissovle and add more HCL to precipitate??

10. ## improving it without changing its overall meaning

Ever been assigned to work on a group project for class! Many students dread group projects: because one student typically does most of the work. Unfortunately for some, group work does not end when students leave school, many employers use teams to

11. ## Physics

A baseball pitcher can throw a baseball at a velocity of 44.5 m/s. If the mass of the ball is 0.12 kg and the pitcher has it in his hand over a distance of 1.79 m, what is the average force exerted by the pitcher on the ball? Any ideas?

12. ## statistics

In order to study whether IQ level is related to birth order, data were collected from a sample of 540 students on their birth order (Oldest/In Between/Youngest) and their score on an IQ test. The data collected in this study would be best displayed using:

13. ## Logic Research

Some drugs combat obesity or alcohol addiction by turning off pleasure centers in the brain. However, if the dosage is too high, there's a risk that people taking them will be plunged into depression. The statements above, if true, support which one of the

14. ## College Physics

A 2.0 m diameter merry-go-round is initially turning with a 4.2 s period. It slows and stops in 22.0 seconds. Before slowing, what is the speed (in m/s) of a child on the rim? How many revolutions does the merry-go-round make as it stops?

15. ## Finance

Suppose the September CBOT Treasury bond futures contract has a quoted price of 89-09. What is the implied annual interest rate inherent in this futures contract? Assume this contract is based on a 20 year Treasury bond with semi-annual interest payments.

16. ## Physics

The coefficient of static friction between the 3.00 -kg crate and the 35 degree incline is .300. What minimum force must be applied to the crate perpendicular to the incline to prevent the crate from sliding down the incline.

17. ## physics

An object with mass m1=5.00 kg rests on a frictionless horizontal table and is connected to a cable that passes over a pulley and is then fastened to a hanging object with mass m2= 10.0 kg. Find the acceleration of each object and the tension in the cable.

18. ## Physics

A baseball pitcher can throw a baseball at a velocity of 44.5 m/s. If the mass of the ball is 0.12 kg and the pitcher has it in his hand over a distance of 1.79 m, what is the average force exerted by the pitcher on the ball?

19. ## chemistry

1998 scientists using a special type of electron microscope were able to measure the force needed to break a single chemical bond. If 2.0 x 10^-9 N was needed to break a C-Si bond, estimate the bond enthalpy in kJ/mol. Assume that the bond had to be

20. ## Statistics

Recall that very satisfied customers give the XYZ- Box video game system a rating that is at least 42. Suppose that the manufacturer of the XYZ- Box wishes to use the random sample of 65 satisfaction ratings to provide evidence supporting the claim that

21. ## math

Four darts are thrown at a dart board with four rings, each ring has a different value, If all four darts hit the board, how many different point totals are possible?

22. ## World Geography

Which statement is not a benefit of increased development? 1)improved access to health care 2)increased wealth 3)more even distribution of resources 4)reduced unemployment

23. ## Introduction to Psychology

Kevin and Cheryl has completed their first day of naturalistic obeservation of adolesents at the local hligh school. As they discussed their experiences during the day, they found that they were both concerned about the difference their presence in the

24. ## Physics

An airplane pilot sets a compass course due west and maintains an airspeed of 221km/h . After flying for a time of 0.490h, she finds herself over a town a distance 125km west and a distance 13km south of her starting point. FIND THE MAGNITUDE OF WIND

25. ## Physics

A ball rolls down a hill with a constant acceleration of 2.0 m/s2. If the ball starts from rest, (a) what is its velocity and the end of 4.0 s? (b) How far did the ball move?

26. ## statistics

Assume that a population is normally distributed with a mean of 100 and a standard deviation of 15.

27. ## physical science

a sled and rider with a combined weight 60kg are at rest on the top of a hill 12m high. what is their total energy at the top of the hill?

28. ## trig

P(2, 9) is a point on the terminal side of è in standard position. What is the exact value of tan è?

29. ## geometry

If m = 80° and m = 30°, then m 3 =

30. ## physics

When a 69 kg person climbs into a 1000 kg car, the car's springs compress vertically by 2.9 cm. What will be the frequency of vibration when the car hits a bump? Ignore damping. answer should be given in Hz.

31. ## chemistry

the combustionof 1.0g of gasoline realises 11kcal of heat (Density of gasoline=0.74g/ml) a)how many megajoules are realised when 1.0 gallon of gasoline burns? b)when a color TV is on for 2 hours 300KJ are used. How long can a color TV runon the energy from

32. ## Physics

A ball rolls down a hill with a constant acceleration of 2.0 m/s2. If the ball starts from rest, (a) what is its velocity and the end of 4.0 s? (b) How far did the ball move?

33. ## physics

help please A sailboat is traveling east at 8.0 m/s. A sudden gust of wind gives the boat an acceleration a = (1.30 m/s2 35° north of east). What is the boat's speed 10.0 seconds later when the gust subsides? What is the boat's direction (in deg) 10.0

34. ## economics

Can you please exlain to me if I'm wrong not just correct me. ps. Ceteris paribusor the following markets, show whether change causes a shift in supply curve, a shift in demand curve, a movement along the supply curve, and/or a movement along the demand

35. ## chemistry

Europium has two stable isotopes, 151 Eu (150.9198 u) and 153 Eu (152.9212 u). The atomic mass given for Eu is 151.9640 u. What is the percent abundance of 153 Eu ??

36. ## fin

Which of the following statements is CORRECT? (Points : 10) If a bond is selling at a discount, the yield to call is a better measure of return than the yield to maturity. On an expected yield basis, the expected capital gains yield will always be positive

37. ## Physics help!

An elevator (mass 4125 kg) is to be designed so that the maximum acceleration is 0.0300g. What is the maximum force the motor should exert on the supporting cable? What is the minimum force the motor should exert on the supporting cable?

38. ## physics

a lawn mower is pushed up a 15degree slope by a 20lb force. Find the component acting parallel to the slope

39. ## computer sciece(Computation Theory)

Find the error in the following proof that all horses are the same color. CLAIM: In any set of h horses, all horses are the same color. PROOF: By induction on h. Basis: For h = 1. In any set containing just one horse, all horses clearly are the same color.

40. ## Physics help ASAP please

A boat needs to travel straight across a river. The current is 10 km/hr. The boat can travel at 16 km/hr. What is the velocity of the boat relative to the bank?

41. ## World History Honors

is this primary source ? The Black Death A Description of the Plague This first account is from Messina, and it described the arrival and initial progress of the disease. At the beginning of October, in the year of the incarnation of the Son of God 1347,

42. ## algebra

write each set in roster form and in set builder notation: N is the set of even numbers that are less than 2.5

43. ## chemistry

Most organic acids can be represented as RCOOH, where COOH is the carboxyl group and R is the rest of the molecule. (For example, R is CH3 in acetic acid, CH3COOH). (a) Draw a Lewis structure for the carboxyl group. (b) Upon ionization, the carboxyl group

44. ## algebra mental math distributive property

find each product mentally using the distributive property i know for 4 (10.2) i do this = 4 (10 + 2) = 4 (10) + 4 (2) = 40. + .8 = 40.8 but I am not sure how to show work on on following 2 problems: 11.6 (9) and 3.4 (5)

45. ## science

a scientist has two samples of a substance. both samples have the same temperature. one sample has a mass of 10 g. the other sample has a mass of 20 g. compare the average kinetic energy and total kinetic energy of the particles in each sample.

46. ## Physics

A sailboat is traveling east at 8.0 m/s. A sudden gust of wind gives the boat an acceleration a = (1.30 m/s2 35° north of east). What is the boat's speed 10.0 seconds later when the gust subsides? What is the boat's direction (in deg) 10.0 seconds later

47. ## Algebra 1 Scientific Notation

Isaac newtons theory of universal gravitation states that the equation F=G m^1m^2/r^2 can be used to calculate the amount of gravitational forces in newtons between 2 point masses (m^1) and (m^2) separated by a distance (r). G is a constant equal to

48. ## English

Help I don't under stand Spondee, I am supposed to find the spondee in these lines...."Who loved his charge but never loved to lead; One whose meek flock the people loved to be, not lured by any cheat of birth."

49. ## chemistry

1. CO2 in solid form is called dry ice. You have a block of dry ice that weighs 500g. How many moles of CO2 molecules do you have?

50. ## physics

I am so confused How fast (in km/hr) must a plane fly along the Earth's equator so that the Sun stands still relative to the passengers. The radius of the Earth is 6400 km

51. ## Logic Research

Political science professor: Many people insist that the Internet is revolutionizing the political process. They argue that Internet debates and online political polls and chat rooms give people greater access to political information. And they’re right

52. ## Chemistry

one of the tin isotopes has 50 protons and 63 neutrons. another isotope of tin might have a)50 protons and 0 neutrons b)50 protons and 62 neutrons c)49 protons and 63 neutrons d)63 protons and 63 neutrons e)63 protons and 50 neutrons

53. ## Science

You have two cups, one containing 100 g of ice at 0oC, the other containing 100 g of water at 80oC. You pour the hot water into the cup containing the ice. What do you wind up with? A) 100 g of 0oC water and 100 g of 80oC water. B) 50 g of 0oC ice and 50g

54. ## University Physics

A 320.0 m tall tower is built on the Equator. How much faster (in m/s) does a point at the top of the tower move than a point at the bottom. The radius of the Earth is 6400 km.

55. ## CHEMISTRY

WHAT IS THE MASS IN GRAMS OF AMMONIA PRODUCED WHEN 280G NITROGEN REACTS TO FROM AMMONIA

56. ## Chemistry

Which of the following statements are true regarding suction filtration? (select all that apply) a) Product should always be rinsed with cold water b) The filter flask can be held in place with your hand c) When filtering is complete you should remove the

57. ## Chemistry

what is the theoretical yield in grams of aspirin if 2.04g of salicycli acid reacts with an excess of acetic anhydride ?

58. ## Physics

A projectile of mass 0.46 kg is shot from a cannon, at height 6.8 m, as shown in the ﬁgure, with an initial velocity vi having a horizontal component of 7.1m/s. The projectile rises to a maximum height of ∆y above the end of the cannon’s barrel and

59. ## Chemistry

how to you calculate the partition coefficient of benzoic acid .13 grams in a 1.6 mL CH2Cl2 and 1.6 mL water?

60. ## ORGANIC CHEM LAB

In a hypochlorite oxidation reaction, cyclohexanol plus NaOCL & aq HOAc results in cyclohexanone. The intermediate in this reaction in ROCl where R = cyclohexyl. a.) Show how this intermediate decomposes to product in a E2-like reaction even at pH = 4-5;

61. ## Math

A store's dressing room policy has a limit of 10 garments per customer. If Carol has at least 3 garments below the limit, how many garments does she have in her dressing room?

62. ## physics

In a large hotel, a fast elevator takes you from the ground floor to the 21st floor. The elevator takes 17 s for this trip: 5 s at constant acceleration, 7 s at constant velocity, and 5 s at constant deceleration. Each floor in the hotel has a height of

63. ## Physics

A person throws a ball upward into the air with an initial velocity of 15.0 m/s. Calculate the following: a.) how high it goes. b.) how long the ball is in the air before it comes back to his hand. c.) at what time(s) will the ball pass a point 8.00 m. If

64. ## physics

A particle, starting from point A in the drawing at a height h0 = 3.1 m, is projected down the curved runway. Upon leaving the runway at point B, the particle is traveling straight upward and reaches a height hf = 4.5 m above the floor before falling back

65. ## Physical Science

1. In which of the following units is acceleration expressed? *A. Newtons B. Foot-pounds C. Kilograms D. Meters per second squared 2. A stone falls from a ledge and takes 16 seconds to hit the ground. The stone has an original velocity of 0 m/s. How tall

66. ## physical science

You have two cups, one containing 100 g of ice at 0oC, the other containing 100 g of water at 80oC. You pour the hot water into the cup containing the ice. What do you wind up with? A) 100 g of 0oC water and 100 g of 80oC water. B) 50 g of 0oC ice and 50g

67. ## math

an electrician cuts a 29 foot piece of wire into two pieces. one piece is 4 feet longer than the other piece.how long is each piece?

68. ## physics

A 50 gram ice cube is cooled to -10oC in the freezer. How many calories of heat are required to heat it until it becomes liquid water at 20oC? (The specific heat of ice is 0.5 cal/goC.) Answer A) 1250 cal. B) 4000 cal. C) 5000 cal. D) 5250 cal. Can someone

69. ## Chemistry

1. Molarity is to moles of solute over liters of solution as molality is to A. molar concentration over molal concentration. B. moles of solute over kilograms of solvent. C. molal concentration over molar concentration. D. moles of solute over moles of

70. ## earth

The acceleration due to gravity on planet X is one fifth that on the surface of the earth. If it takes 4.6 s for an object to fall a certain distance from rest on earth, how long would it take to fall the same distance on planet X? Answer in units of s

71. ## Physics Help

A ball of mass 1.76 kg is tied to a string of length 4.19 m as shown in Figure P6.50. The ball is initially hanging vertically and is given an initial velocity of 9.4 m/s in the horizontal direction. The ball then follows a circular arc as determined by

72. ## Math - Stats

An experiment was conducted where rats could choose to enter one of two corridors, A or B. A random sample of three rats is selected. Let x = number of rats that select corridor B. Assuming the rats select their favorite corridor independently of one

73. ## Math 116a

Translate to an algebraic expression The product of 45% and some number the translation is? Would it be .45/x?

74. ## chemistry help ASAP

a graduated cylinder contains 20.0 ml of water. when 100.g of a brass cylinder were added to the graduated cylinder, the water level rose to 32.6 ml. given this information what is the density of the brass cylinder?

75. ## Physics

Two teams are having a rope pulling contest. Team A is pulling with a force of 2400 N at 135 and team B is 1550 N at 315. What is the resultant force?

76. ## physics

The speed of light in clear plastic is 1.866 ×10^8 m/s. A ray of light enters the plastic at an angle of 29.3 degrees. At what angle is the ray refracted?

77. ## Physics

Emily takes a trip, driving with a constant velocity of 79.5 km/h to the north except for a 22 min rest stop. If Emily's average velocity is 68.8 km/h to the north, how long does the trip take?

78. ## Physics

Gravity on the surface of the moon is only 1 6 as strong as gravity on the Earth. What is the mass of a 30 kg object on the Earth? The acceleration of gravity is 10 m/s

79. ## chemistry

give one use of each of the following: A) ETHENE B)TETRAFLOUROETHENE C) CHLOROETHENE D) PROPENE E) STYRENE

80. ## Corporate Finance

I am looking at a stock whose price is \$45.00. I want a return of at least 8% and I expect to hold the stock for 5 years and expect the stock to reach \$60. The stocks beta is 1.25. Calculate the stocks PV. Should I buy the stock?

81. ## spanish

do anyone have the answer for penn foster exam 38981200

82. ## algebra

solve the equation for the indicated variable 6k + 8m = 20; m i don't understand! help asap

83. ## Physics

What are the sign convention of pushes and pulls? Its for a lab where we push or pull a cart towards a motion sensor. I can't seem to wrap my head around this. Is push positive and pull negative or the other way around?

84. ## Math 116a

Amy bought a pair of running shoes she paid \$66.09 during a 20% off sale, what is the regular price of the shoes? Would I take 66.09 divide by 20%?

85. ## physics

Two boxes sit side-by-side on a smooth horizontal surface. The lighter box has a mass of 5.18 kg, the heavier box has a mass of 7.51 kg. (a) Find the contact force between these boxes when a horizontal force of 3.9 N is applied to the light box.

86. ## Math

A square with sides x + 2 and an equilateral triangle of sides with 2x have equal perimeters x = what?

87. ## MATH

Kelly has twice as many CDs as Lou. Tiffany has three times as many CDs as Lou. Altogether they have 372 CDs. How many more CDs does Tiffany have than Lou?

88. ## Physics

The lowest A on a piano has a frequency of 27.5 Hz. Assume: The tension in the A piano wire (of length 1.8 m) is 305 N, and one-half wave- length occupies the wire. What is the mass of m the wire? Answer in units of kg.

89. ## math

lim h->0 [h - sqrt(x+h) + sqrt(x)]/h

You are given two different circles. The diameter of the first circle is the radius of the second circle. What is the ratio of the area of the larger circle to the area of the smaller circle. Your answer should be in the form of a simplified fraction. I

i need help with variables and patterns algebra

92. ## Chemistry

1. Molarity is to moles of solute over liters of solution as molality is to A. molar concentration over molal concentration. B. moles of solute over kilograms of solvent. C. molal concentration over molar concentration. D. moles of solute over moles of

93. ## MATH help

a certain radioactive isotope has a half life of approx 1,300 years . How many years to the nearest year would be required for a given amount of this isotope to decay to 55% of that amount. So I am not sure where to put the 1,300 1,300=2600*e^t or

94. ## math

find derivative using limit definition: f(x) = x - sqrt(x) so f'(x) = lim h->0 [f(x+h) - f(x)]/h but I keep trying to solve by multiplying by the conjugate but I can't figure it out..there's nothing that can be cancelled or anything and I can't get the

95. ## English

I forgot to add a sentence at the beginning. I don't think the verb trust is correct. When Johnny moved to New York. Claire wondered how they could trust each other. By the way, can you recommend a site where I can find entry tests for students at a

96. ## Algebra

Add polynomials 0.15x^4 + 0.10x^3 - 0.01x^3 + 0.01x^2 + x 1.25x^4 + 0.11x^2 + 0.01 027x^3 + 0.99 -0.35x^4 + 15x^2 - 0.03 I don't understand PLEASE PLEASE HELP!!

97. ## physics

A bus that is traveling at 31.0 km/h, speeds up at a constant rate of 3.7 m/s2. What velocity does it reach 6.8 s later?

Na2Co3+H2

99. ## Science

What causes a chemical bond to form between atoms ?

100. ## Math

A trapezoid is formed by placing a right isosceles triangle next to a square as shown in the figure. The total area is 54 ft2. Find the length of the bases and the height.

101. ## calculus

Find the following limit where f(x) = 4x2 − 3x. limit delta x --> f(x + delta x)- f(x)/delta x can someone please help me

102. ## spanish

do anyone have the answer for penn foster exam 38981200 part 4 comprehension

103. ## chemistry

Calculate the mass of HCl required to prepare 2.5 liters of a 0.08 molar solution of HCl. H 1.01 Hydrogen 17 Cl 35.45 Chlorine

104. ## geometry

in the xy coordinate plane point b (-3,2) and point d (3,-4)are opposite vertices of square abcd if point h is the midpoint of line segment bc what is the area of triangle ahd ?

105. ## Physics

Units count. Show all steps, not just the numerical substitutions. Show the equations you used. No information is missing. A person throws a ball upward into the air with an initial velocity of 15.0 m/s. Calculate the following: a.) how high it goes. b.)

106. ## math calculus

1.)dy/dx for 3x^7+5/x^3+3(7square roots of x^2)+sinx 2.)d/dx sinx/6x^4 3.)d/dx sin(6x^4) 4.)d/dx sin^4(6x)

107. ## math

the sum of the lenths of any two sides of a triangle must be greater than the third side. if a triangle has one side that is 17 cm and a second side that is 4cm less than twice the third side, what are the possible lenths for the second and third side?

108. ## math

Mercury is 5.79 x 10^7 km from the sun. Light travels at a speed of 3.0 x 10^5 km/s. How long would it take for light to travel from the sun to Mercury? I have to answer this problem using scientific notation.

109. ## math

Francesca had spent 1/2 of her money in shop A and 3/4 of what she had left in shop b. She then had 4.75euro. How much money was her money had she in the beginning?

110. ## physics

A person walks 11.0° north of east for 3.30 km. How far due north and how far due east would she have to walk to arrive at the same location?

111. ## Math

Bank XYZ is hiring, and they would like to determine the number of tellers they should hire. Each teller is paid \$15 per hour. Bank XYZ has assessed a cost on customer waiting at \$10 per customer in line per hour. (In other words, each customer standing in

112. ## Physics

Two objects, A and B, have the same kinetic energy. A has a speed that is 12.1 times greater than the speed of B. What is the ratio of the mass of B to the mass of A? I'm not sure how to do this one given... KE_A = KE_B & V_A = 12.1V_B How do I find the

113. ## Cal

10. For f(x)=lnx, construct tables, rounded to four decimals, near x=1, x=2, x=5, and x=10. Use tables to estimate f'(1), f'(2), f'(5) and f'(10). Then guess a general formula for f'(x). I don't understand how to do number 11 11. Estimate f'(2) using the

114. ## Comp 156

To make supporting points it is important that one finds relevant, accurate, and reliable sources. What should you consider when looking for helpful sources? What are some red flags that indicate you should avoid a particular source?

115. ## english

hey i corrected this i was wondering if what i did was correct and am still stuck on to of them. Each of the following exercises shows the original source, and then a student’s sentence and/or citation about that source. Each sentence and each citation

116. ## chemistry 12

Equilibrium concentrations (a)(mol/L)// (b)(mol/L)// (c)(mol/L) 0.040 // 0.066 // 1.72x10^-2 0.080 // 0.017 // 8.8x10^-3 0.030 // 0.024 // 4.7x10^-3 My data was collected at 25○C for the reaction A(g) + B(g) = C(g) What i have to do now is involving

117. ## College Physics

The roller coaster in Figure P6.36 starts with a velocity of 15.4 m/s. One of the riders is a small girl of mass 30 kg. Find her apparent weight when the roller coaster is at locations B and C. At these two locations, the track is circular with the radii

118. ## physics

A car is originally traveling at 15.0 meters per second on a straight horizontal road.The driver applies the brakes causing the car to decelerate at 4.00 meters per second ^2 until it comes to a rest. Determine the cars stopping distance

119. ## physics

A 30.0 g bullet strikes a 0.595 kg block attached to a fixed horizontal spring whose spring constant is 6.66 103 N/m and sets it into vibration with an amplitude of 21.8 cm. What was the speed of the bullet before impact if the two objects move together

120. ## Science

Each of the following language is the complement of a simpler language. In each part, construct a DFA for the simpler language, then use it to give the state diagram of a DFA for the language given. In all parts  sigma={a,b} g. {w|w is any string that

121. ## Science

Give state diagrams of DFAs recognizing the following languages. In all parts sigma={0,1}. i.{w| every odd position of w is 1}.

122. ## For Ms. Sue

What if the pentagonal prism net is on grid paper? On the website you reccomended, I looked at the formula and there were these letters and i have know idea what they are, wwell what do they stand for? Here are the letters or gorups of letters: ans nsh a s

A farm tractor is pulling 2 pieces of equipment east, with each piece of equipment 25 north and south of the x axis. If it takes 50,000 N of force on each chain to keep the equipment moving, then what is the total force of the tractor in the x direction?

124. ## social studies,managnent

Group 1 will represent a major tobacco company like R. J. Reynolds or Philip Morris. . Topic that will be debated is: Should tobacco companies cease and desist all advertising in the United States? Each group should thoroughly research the issues, and come

125. ## physics

A camper kayaks 16km east from a camoing site, stops, and then paddles 23km west. What is the camper's final position with respect to the campsite? I need to solve this problem using the GRASS method. pls help me.

126. ## Chemstry/(microsoft excel)

I am having a hard time solving this problem. The formula given is: T=Tin - (Tin - Tinit.)e(-v/v)t If the initial temperature Tinit is 115 (degrees F), the cold water temperature is 35 (degrees F) (1.7 degrees C), and the volume and volumetric flow rate

127. ## English

1. All the food was gone. 2. All the food were gone. 3. All the foods was gone. 4. All the foods were gone. (Which ones are grammatical? What kind of noun is 'food'? A countable noun or an uncountable noun? A material noun or a collective noun? Thank you.)

128. ## math 116a

use distributive property to solve the equation 4(w-3)=-12 W=0

129. ## physics

At highway speeds, a particular automobile is capable of an acceleration of about 1.6 m/s2. At this rate, how long does it take to accelerate from 81 km/h to 107 km/h?

130. ## fluid power

a cyclinder must move a 2000lb load 2 ft. how much work must work in perform

131. ## MATH

It takes Hank twice as long ot build one table as it takes to build one chair. If it takes 30 hours to make a dinning room set of 1 table and 4 chairs, how long does it take to make the table?

132. ## stast

a populstion of n=6 score has sum=12 and sum square= 54 what isthe value of ss for this population?

133. ## Physics

Units count. Show all steps, not just the numerical substitutions. Show the equations you used. No information is missing. A person throws a ball upward into the air with an initial velocity of 15.0 m/s. Calculate the following: a.) how high it goes. b.)

134. ## earth

Find the ratio of the gravitational attraction between (a)a man of mass 100 kg and a woman of mass 50 kg who is 10 meters away from him and (b) the attraction between the woman and the Earth.

135. ## physics

On a 3 day hike a hiker walks 40 km due south the first day, 30 km at an angle of 40 degrees south of east the second day, and 25 km at an angle of 45 degrees north of west the third day. What is the person's displacement from her original position?

136. ## College Algebra :(

Sketch the graph of y=mx for the given values of m. m=3,-2,2/3,-1/4 please help me, I'm so confused!

137. ## English

Hi, I'm writing an essay and I was wondering if this is how you would write the sentence below. By the way Giannetti is the author and 147 is the page number. According to Giannetti, “there are no fixed rules concerning rhythm in films and some editors

138. ## statistics

Maurice has been recording the price of fuel at a local gas station throughout the week. His data is shown below. Day Price (per gallon) Monday \$2.71 Tuesday \$2.77 Wednesday \$2.86 Thursday \$2.80 Friday \$2.75 To the nearest percent, what is the percent

139. ## physics

A car travels along a straight stretch of road. It proceeds for 14 mi at 50 mi/h, then 28.3 mi at 48 mi/h, and finally 37.4 mi at 38.3 mi/h. What is the car’s average velocity during the entire trip? Answer in units of mi/h Can u show me the steps to

140. ## math

23.6 repeating find fraction notation

141. ## science

what causes a chemical bond to form between atoms ?

142. ## Chemistry

Which of the following statements are false regarding using a solid drying agent? (select all that apply) a) Water can be present due to isolation and/or purification conditions b) A good drying agent must be soluble in organic solvent c) One type of

143. ## pre algebra

you spend a total of 25 minutes typing an e-mail to your friend and writing a letter to your aunt. you can type 60 words per minute and handwrite 20 words a minute. let "m" be the number of minutes you type the e-mail to your friend. write an expression in

Find the following limit where f(x) = 4x^2 − 3x. limit-->(f(x+ delta x)-f(x))/(delta x) delta x **delta x means the triangle symbol with x next to it***

A person pulls a wagon through thick grass with a force of 800 N. The angle that the handle makes with the ground is 35. How much force moves the wagon forward?

146. ## language

How do you diagram this sentence? Please don't ask me to do the mashing.

147. ## Chemistry

In the haber process for the preparation of NH3 which is given by the equilibruim? N_2_(g)+3H_2_(g) 2NH_3_(g)...... delta H= -92.38kJ State the conditions of concentrations and temperture that will favor production of NH_3_? Please help! would it be high

148. ## chemistry ASAP

the density of water is 62.4 lbs/ft^3.what mass of water in kg will a rectangular hold if it measures 2.00 ft by 3.00 ft by 6.00 inches?

Which of the following is not important in SQR3 method? A.increse in the speed of reading B.absorption of information C.improvement of reading skills D.increse in retention I got A what do you think?

150. ## chemistry

Archimedes used density along with mass and volume of alloys (mixtures) of gold and silver to determine the percent of gold (and also silver) in these alloys by simple, non-destructive measurements. Prove that the mass of gold in a given mass of silver

151. ## Physics

Supose the water flows out from a pipe at 3 kg/s & its velocity changs from 5 to 0 on striking wall then the force exrted by water on wall wil be?

which of the following is not one of the three steps to take when audience benefits are hard to identify or develop? a. Identify the feelings, fears, and needs that may motivate your audience. b. Identify the objective features of your product or policy

153. ## Health

11. The physical changes that prepare your body to respond quickly and appropriately to stressors are medical alert responses. a. true b. false B? 29. Someone with ADHD is likely to benefit from a. group therapy b. medication c. psychotherapy d. all of the

154. ## Physics

A projectile of mass 0.46 kg is shot from a cannon, at height 6.8 m, as shown in the ﬁgure, with an initial velocity vi having a horizontal component of 7.1m/s. The projectile rises to a maximum height of ∆y above the end of the cannon’s barrel and

155. ## statistic

a population of n = 100 score has u = 30 and standard deviation =4 what is the population variance

156. ## physics

a) calculate the acceleration of a 0.55-m-diameter car tire while the car is traveling at a constant speed of 25m/sec. b) compare this with acceleration experienced by a jet car tire of diameter 1.0m when setting a land speed record of 310m/sec

157. ## chemistry-HELP ASAP

the density of water is 62.4 lbs/ft^3.what mass of water in kg will a rectangular hold if it measures 2.00 ft by 3.00 ft by 6.00 inches?

158. ## math

Kahlil said that using the equation € (a + b)2 = a2 + 2ab + b2, , he can find a similar equation for € (a − b)2 . Examine his argument. If it is correct, supply any missing steps or justification; If it is incorrect point out why. € (a + b)2 = [a +

159. ## chemistry - help

the density of water is 62.4 lbs/ft^3.what mass of water in kg will a rectangular hold if it measures 2.00 ft by 3.00 ft by 6.00 inches?

160. ## Geometry

What is the slant height of a right pyramid with a surface area of 65.5 meters squared and a base perimeter of 14 metres?

161. ## English essay final draft.

HEY I FINISHED MY FINAL DRAFT, DONE EDITING TOO. COULD YOU PLEASE CHECK IT AND TELL ME IF THIS ESSAY IS ILLUSTRATIVE ENOUGH? Illustration essay: Successful student The value of education has really fallen in the past years; some say college is hard to cope

162. ## bryant stratton

provide a detail descripition and definition of medical language and terminology and its components. the narrative should also explore the importance of medical terminology to the medical assisting and medical administrive assisting field while describing

163. ## physics

The acceleration due to gravity on planet X is one fifth that on the surface of the earth. If it takes 4.6 s for an object to fall a certain distance from rest on earth, how long would it take to fall the same distance on planet X? Answer in units of s

164. ## Cal

10. For f(x)=lnx, construct tables, rounded to four decimals, near x=1, x=2, x=5, and x=10. Use tables to estimate f'(1), f'(2), f'(5) and f'(10). Then guess a general formula for f'(x). I don't understand how to do number 11 11. Estimate f'(2) using the

165. ## english

I need help with a nonverbal communication types: For example, for (1)the American Sign language...I need to give examples of workplace and lifestyle. (2) Proxemics-the languge of space;example of workplace and lifestyle.Please tell me a ways to write

166. ## English (MLA format)

Hi, I was wondering what was the most proper way to incorporate a quote from a piece of work that is a quote from another piece of work. If this makes no sense... in my paper I'm quoting a quote from a document that we have discussed in class. Within this

167. ## math

i need to draw a fraction strip showing that the two fractions 2/5 and 6/15 are equivalent. i forgot how to do this

168. ## algebra

Explain how to find the sum using game chips, then give the answer 8+-10

169. ## maths

1)There are 7 groups of Scouts attending a campfire with an average of 28 scouts per group. Each group has a different number of scouts. If the largest group has 33 scouts in it, what is the smallest possible number of scouts in each group? 2)The average

170. ## Since

an orinisams abiliaty to mantian a steadyconditionfor examplebody temputure,is called................

171. ## English

Could you please check these sentences? Thank you very much. 1) Before he went to Celtic Camp, Johnny did some mock exams as a preparation (to prepare) for his A-level exams. 2) Kane suggests he should copy his essays from the net. Johnny refuses (to

172. ## Physics

A boat is headed due east (0) at 20 km/hr. A wind blowing to the south west at 18 km/hr is also acting upon it. What is the boat's velocity?

173. ## social studies,managnent

Toyota used to sit on top of the world. It basked in the reputation of building high-quality cars efficiently. It enjoyed unprecedented growth, even surpassing General Motors as the largest car manufacturer in the world. But all of that came tumbling down

174. ## Introduction to ljfe sciences BIO 130

Artificial sweeteners, colorants, oils, and medications are manufactured after they are accepted by the U.S. FDA. In order to have such acceptance for public use, companies have to complete exhaustive testing to demonstrate the safety of their products.

175. ## math

a rectangular plot of ground having dimensions 46 feet by 30 feet is surrounded by a walk of uniform width. If the area of the walk is 240 ftˆ2, what is its width?

176. ## chemistry

350.ml of .25M KOH is reacted with 250.ml of .30M H3PO4. Determine which is the limiting reagent, the molarity of the salt formed, and the final molarity of the reactant that was in excess.

177. ## physics

sarah ride her bike at an average spped of 6m/s. how long does it take her to ride 6km (6,000 m)?

178. ## statistics

what is the z-score for a sample that has a sample mean of 6 based on a sample of 36 a population mean of 4 and a population std deviation of 3

179. ## chemistry

What are the major products produced by heating the following isomeric alkyl bromides with NaOEt? Name the products.

180. ## science

2. Olive oil is almost pure triolein (a molecule). The molar mass of triolein is 885 g/mol. How many moles of olive oil molecules have you got in 500g of olive oil?

181. ## College Algebra

Let g(x) = x3 - 12x + 16. Find the location of the local minimum of this function (there is only one such location). Evaluate function g(x) at the x-value of the ordered pair location of this local minimum.

182. ## kings view school

a two digit number has more ones than tens.what could the number be?how do you know your number is correct?how many number can you make?

183. ## Physics

A projectile of mass 0.46 kg is shot from a cannon, at height 6.8 m, as shown in the ﬁgure, with an initial velocity vi having a horizontal component of 7.1m/s. The projectile rises to a maximum height of ∆y above the end of the cannon’s barrel and

184. ## earth space science grade 11

what is Microbiologist ? I have to name 4 things that tell me what it is

185. ## Physics help ASAP please

An airplane is flying south at 500 km/hr and is being blown by a crosswind of 75 km/hr east. What is the resultant velocity of the airplane?

186. ## chemistry

Calculate the solubility (in g of compound per 100 g of water) of a compound for which 0.74 g form a saturated solution in 2 mL of water. Density of water: 1.00 g/mL

187. ## Mathematics

Kelly has twice as many CDs as Lou. Tiffany has three times as many CDs as Lou. Altogether they have 372 CDs. How many more CDs does Tiffany have than Lou?

188. ## Alg/2 Trig

Given the functions f(x)=-x^2+7 and g(x)=3x+4 find f(g(-5)) Write the composition above using an alternative notation.

If there are 9 rectangles how many do i shade in to make 2/3? A.10 B.3 C.5 D.6

190. ## American Literature

Can this statement relate to any problems that we have today in America? Explain. Our fathers gave us many laws, which they had learned from their fathers. These laws were good. They told us to treat all people as they treated us; that we should never be

191. ## Science

How is the water in icebergs involved in the water cycle on Earth?

192. ## CHEMISTRYYYY HELP

A sample of gold ore contains 22.0 g of gold metal per 100kg of ore. If gold has a market value of \$350.00 per oz., what mass of ore, in tons, must be refined to get one million dollars worth of pure gold?

193. ## math

23.6 repeating in fraction notation

194. ## english

how do i turn this sentence People who attract a lot of friends are neither negative nor greedy. into a parallel sentence

195. ## college Algebra

Let g(x) = -2x2 + bx + c be a quadratic function, defined everywhere, where b and c are constants. If x = 1 marks the location of one of the zeros of this quadratic function, and if the y-intercept of this function is at (0, 5), then use this information

196. ## geometry

Alice is making the profile of a face. She is also making an exact replica of a circle with a radius of eight inches. Which statement is correct about the profile and the replica?Answer A: The profile is made by sketching and the circle is made by drawing.

197. ## Science

A balloon has a volume of 1000cc at room temperature (27oC). I leave it in my parked car, which the sun heats up to 42oC. What is its new volume? Answer A) 950 cc. B) 1000 cc. C) 1050 cc. D) 1500 cc.

198. ## Calc

Find the point in which the line x=1-t, y=3t, z=1+t; meet the plane 2x-y+3z=6

199. ## Math

X;9, 3, 7, 11, 6. Y;11, 2, 15, 4, 9. Whats the value. The strength. Direction and shared varience

200. ## Physics

A man stands on the roof of a 15m tall building and throws a rock with a velocity of magnitude 30m/s at an angle of 33deg above the horizontal. Ignore air resistance. Calculate: a) the maximum heigh above the roof reached by the rock b) the magnitude of

201. ## chemistry

the number of neutrons in the nucleus of an atom of 9Be 4 under 9

202. ## chemistry

at standard pressure, which has the highest average kinetic energy? a)H20(g) at 110 oC b)H20(s) at -10 oC c)H20(l) at 25 oC d)H20(l)(arrows going opposite directions)H20(g) at 70 oC e)H20(s)( arrows going opposite direction)H20(l) at 0 oC

203. ## Biology honors (High School)

How does a turbine generate electricity?

204. ## Statistics

Determine the regression line of x+2y-5=0 and 3x+3y-8=0 (i) y on x and (ii) x on y, (iii) Find r using the regression coefficients

206. ## College Algebra

Let g(x) = -2x2 + bx + c be a quadratic function, defined everywhere, where b and c are constants. If x = 1 marks the location of one of the zeros of this quadratic function, and if the y-intercept of this function is at (0, 5), then use this information

207. ## math

The slope of any line perpendicular to AB where A(0,-3)and B(1,9) are two points on the line is m = what?

208. ## Ecology

Find the name of an organism hiding in the word habitat

209. ## physics

You drive a car 7 h at 42 km/h, then 7 h at 65 km/h. what is your average velocity? answer in units of km/h

210. ## stast

a populstion of n=6 score has sum=12 and sum square= 54 what isthe value of ss for this population?

211. ## algebra

find each product metally using the distributive property i know for 4 (10.2) i do this = 4 (10 + 2) = 4 (10) + 4 (2) = 40. + .8 = 40.8 but I am not sure how to show work on on following 2 problems: 11.6 (9) and 3.4 (5)

212. ## School in General

I was woundering on how exactly grades were curved normally. When instructors apply curves what is generally done? What happens if there's one person in a course that has a perfect score and the rest have like 80% of the points given out during the course.

213. ## English

What is the indirect object? When you come back to the table, please bring me the mustard.

214. ## Math

What is the Fraction of 7/8 and 5/8?

In a rugby match 3 players huddle around a fourth player and push him. If they push with the following forces, what is the resultant force on him? 160 N 125, 140 N 35, and 220 N 200

216. ## physics

For an object travelling at a constant velocity, how does the dispalcement change over equal time intervals? I do not understand this question pls help.

217. ## physics

A person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of vi = 13 m/s. The cliff is h=37 m above the water's surface, as shown below. With what speed does it strike the water?

218. ## math

Jill has four of her five game scores: 8,6,6,3 Her average schore for the five games is 6 points. What is the fifth game score? Write an equation to help sove the problem.

219. ## U.S. History

What is the Sullivan Act?? and was it of 1911 or 1924??

220. ## Calculus

Let A be the region bounded by the curves y = x^2-6x + 8 and y = 0. Find the volume obtained when A is revolved around the Y-AXIS

221. ## Math

Draw a number line. Make sure the following numbers are on your number line: 1,472; 1,560; 1,481.

222. ## spanish

Quieres ven con nosotros sabado noche

223. ## Calculus

Find the derivative of the function y=x2 + 2x + 1/ square root of x2 + 2x -1

224. ## calc

find derivative using limit definition: f(x) = x - sqrt(x) so f'(x) = lim h->0 [f(x+h) - f(x)]/h but I keep trying to solve by multiplying by the conjugate but I can't figure it out..there's nothing that can be cancelled or anything and I can't get the

225. ## physics

The chain is composed, as shown in the figure, E ₁ = 1,8, E ₂ = 1,7, E B ₃ = 1,5, r ₁ = 0,2 Ohm, r ₂ = r ₃ = 0,1 Ohm. Determine the resistance R and the current strength in all parts of the chain, if you know that the third element of the

226. ## math 116

Solve using the multiplication principle Don't forget to preform a check 11x=-99 Would the answer be -9?

227. ## literature

how does the role of the supernatural differ in the stories of Echo and Narcissus and Deadalus and Icarus?

228. ## Geometry

Name XYZ IN THREE WAYS??MCP??

229. ## math

i am an odd three digit number if you round me to the ten o become 500 the sum of my digits 8 what numger am i

230. ## math

there are 1170 students and all need to go on a trip. they will be flying on 138 seat planes. hm planes are neded to transport all the students.

231. ## Economics

I'm trying to research for a paper about why we shouldn't have flat tax rate, and a reason that i'm seeing people putting online, is that a flat tax rate of say, 18% would decrease tax revenue? Can someone explain how? I don't understand how taxes work.

232. ## chemistry

The compound X4C3 contains 15.03% carbon. What is the chemical symbol for X ?

233. ## spanish

complete the sentences blank un boligrafo.

234. ## math

john is standing 100 metres away from a building.the angle of elevationto the top of the building is8 degrees .He now walks straight away from the building.When he stopes,the angle of elevation is only 1 degree and 48 seconds.How far away is now from the

235. ## language

In the sentence, People still make potato flour today. What is the verb

An airplane that can fly at 300 km/hr is flying at 210 when it is hit by a wind of 125 km/hr at 110. What is the new velocity of the plan?

237. ## Math 116A

Simplify 8[56-(-86-32)]= Would thid be 1392 is that what is ment by simplify?

238. ## geometry

what name is given to a 57 degrees and a 36 degrees angle

239. ## English

Can you help me check these sentences, please? Thank you. I need to improve both the grammar and the vocabulary.It's urgent. 1) Claire was a sixteen-year-old girl from Texas when she met John, her future boy-friend. 2) They met each other at a friend's

240. ## physical science

a motorcycle has a mass of 2.50*1000 kg. a constant force is exerted on it for 60.0 s. The motorcycle's initial velocity is 6.00 m/s and its final velocity 28.0 m/s. What is its change in momentum?

241. ## jones

spores are produced in reproductive structure called .

242. ## Science

A 50 gram ice cube is cooled to -10oC in the freezer. How many calories of heat are required to heat it until it becomes liquid water at 20oC? (The specific heat of ice is 0.5 cal/goC.) Answer A) 1250 cal. B) 4000 cal. C) 5000 cal. D) 5250 cal. Can someone

243. ## algebra

1.the square og 2 is the same as two times the difference of g and 10. 2. the product of 3 and the square of g equals the sum of thirty and the product of nine and g. i really need help on this i don't get it. thanks

244. ## math

five wrenches arranged in order of size. 3/8, 7/16,1/2, x, and 5/8. if wrenches increase in size by the same amount, what is the measure of x?

245. ## math

If you were converting a negative number say -20 from Celsius to fahrenheit and you were multiplying it by1.8 would you make -20 into .02

246. ## Calculus

Let A be the region bounded by the curves y = x^2-6x + 8 and y = 0. Find the volume obtained when A is revolved around the Y-AXIS

247. ## English

For the essay I have to write I have to talk about examples of sequences and montages (which are transitional sequences of rapidly edited images) for the movie "The Gold Rush" by Charlie Chaplin. I'm having a hard time with examples of montages. Can you

248. ## math

Posted by kathy on Monday, September 26, 2011 at 8:05pm. 1.the square og 2 is the same as two times the difference of g and 10. 2. the product of 3 and the square of g equals the sum of thirty and the product of nine and g. i really need help on this i

249. ## math

Mr.Garica's class is harvesting the school garden.The rectangular garden is twenty-five feet by fifteen feet.What is the area of the garden?

250. ## math

what are percents

251. ## English

I AM DONE WITH MY ESSAY : Could some one please read it and tell me if it is correct Illustration essay: A successful student The value of education has really fallen in the past years, some say college is hard to cope up with and some do not even bother

252. ## Chemistry

In the recent Chem Activities, we have been learning about how Coulombic attractions and repulsions determine properties of atoms like ionization energy and atomic radius. We have made two assumptions not completely justified by the data we had up to this

How do you do this 5a+(9)-12e*5a+(3)

254. ## Math

The sunshine tool company charges \$25 for hammers and \$14 for screwdrivers. the company ships a total of 55 tools along with the bill of \$968.How many of each tool was shipped?

255. ## math

What is the largest sum of money Bob can have in change and still not be able to give change for a dollar? HINT: The answer is more than \$0.99.

256. ## Phsics

A disk on an air table is acted upon by the following forces 100 N 90 250 N 135 150 N 200 200 N 60 155 N 270 What is the force on the puck?

257. ## Physics

1) would dropping an object higher than it's usual point change it's acceleration? 2) would throwing an object upward change it's acceleration? 3)does the mass of an object affect it's acceleration? 4) how does altitude affect the value of g? what other

In the set of all whole numbers from 20 to 29,what fraction have two integers which add up to 7? A.1/9 B.1/10 C.5/10 D.9/10

of the set of whole numbers from 0 to 9, what fraction are odd numbers? A.1/9 B.1/10 C.5/10 D.9/10

260. ## psychology

Name one to three important theorists associated with biological psychology.

261. ## applied math

An operating log indicates that the average flow through a pump for ten hours is 285 gallons per minute. The following week, the same output is measured as 340 gallons per minute. What is the percent change?

262. ## physics

A nail is dropped from a height of 400m. How long does it take to land?

263. ## Math

If a license plate number starts with a letter of the alphabet followed by 5 numeric digits, how many license plate numbers can be constructed if the first numeric digit cannot be a zero?

264. ## Math 116

The length of a rectangle is fixed at 23cm What lengths will make the perimeter greater then 86cm? Then length must be greater then cm. would it be 20cm? l+l+23+23>86 2l+46>86 2l>40 l>20?

265. ## calculus

Evaluate: (without using Hopital's rule) d) lim (6-3x)/(((5x+6)^1/2)-4) x->2 ^ | square root

266. ## physics

A car travels along a straight stretch of road. It proceeds for 14 mi at 50 mi/h, then 28.3 mi at 48 mi/h, and finally 37.4 mi at 38.3 mi/h. What is the car’s average velocity during the entire trip? Answer in units of mi/h

267. ## physics

A car travels in a straight line for 5 h at a constant speed of 73 km/h . What is its acceleration? Answer in units of m/s2

268. ## calculus

the distance between (9,2) and (x,7) is 10 units, I've worked it out till I got to , 10= sqrt of (x-9)^2+36 and I don't know what to do next. help?

269. ## chemistry

10.0mL of a pure liquid substance has a mass of 25.0 g. What is the mass of 3.00 L of the substance?

270. ## english

what is a good kenning for the ocean

271. ## English

1. This is Jenny Kim from BNN, reporting from the ORBIS plane. 2. This is Jenny Kim from BNN, and it is reporting from the ORBIS plane. 3. This is Jenny Kim from BNN, and she is reporting from the ORBIS plane. 4. This is Jenny Kim from BNN, and is

272. ## algebra

need help bad can you help me with this problem (-2/3,1) is a solution to -9x-2y=8

273. ## College Algebra

Let h(12) = -100 for some function h(x), defined everywhere. If the average rate of change of h(x) from x = 12 to x = 20 is 50, then find h(20).

274. ## math

298 divided by.04

275. ## psychology

the energy which directs behavior in to productive areas originates in 1. instinct 2. emotion 3. drive reduction 4. leptin

276. ## algebra

If the cost of a cell phone has decreased 400% during the past 10 years, does that correspond to a cost decrease of four times? Explain your answer as though you were talking to someone who has never taken algebra.

277. ## :)

Ms.sue is the best helper for homework everrr!!! :) she helps alot for everyone she like the only one that really helps are and writeacher :)

278. ## physic of modern technology

A standard 2500„aC light bulb produces what fraction of its light at wavelengths that cannot be detected by the human eye as visible light? You can submit the answer as a decimal fraction or as a percent, so that if the answer were one half, you could

279. ## MATH

find the coordinate of the center and identify the conic: 5y^2 - 2x^2 - 10y - 12x = 23

280. ## math

Jen spends half his money on lunch and then spends \$1.50 for a magazine. He uses one third of what he has left to pay for the bus ride home, then gives his little brother a quarter.If Jen has three nickles and two quarters left, how much money did he have

an empty 3.5 L container weighs 650 g when empty. When filled with a 3.5%, by mass, of salt solution, the total mass then is 3.375 kg. How many grams of salt are there in the solution in the container?

282. ## Maths

Nathan has a bag of marbles. Half of them are blue.Eight are red & a sixth of them are cat's eyes. How many marbles are in Nathan's bag?

283. ## america past and present

in america,the main influenue of the enlightenment was expressed through.

284. ## math

Jen spends half his money on lunch and then spends \$1.50 for a magazine. He uses one third of what he has left to pay for the bus ride home, then gives his little brother a quarter.If Jen has three nickles and two quarters left, how much money did he have

285. ## College Algebra

Let h(12) = -100 for some function h(x), defined everywhere. If the average rate of change of h(x) from x = 12 to x = 20 is 50, then find h(20). Type your numerical response in the space provided. Do not type in any of the processes which you utilized to

286. ## math

complete to show how you can find the sum by making a ten, hundred, or thousand. ex. 9 + 5= 9+1+____ 10+_____ ________

288. ## Math

Brenda dog is 5 times as long as hugh dog together the dogs are 48 inches long how many inches long is hugh dog

289. ## math

how do i find the answer to this expression 1.4 over 5.5 subtract 4.9 over 2.0

290. ## English

e.g. Dr. Del Monte How do you pronounce "Del Monte"?

291. ## Science

Does Mars have a Water Cycle?

293. ## Math

Identify a real-life situation that represents each integer a)-27 b)15 c)-150 d)2

294. ## english

Seek his will in all you do and he will direct your paths. What are the nouns in this sentence?

295. ## geometry

The center of a circular sports arena is 360 ft away from the wall surrounding the arena. What is the area of the sports arena? Approximate π=3.14.

296. ## math

What is the largest sum of money Bob can have in change and still not be able to give change for a dollar? HINT: The answer is more than \$0.99. But work the problem

297. ## Math

1170 students are going on trip. they are flying on 138 seat planes. all students must go and all must be seated. how many planes are needed to transport all of the students ?

298. ## Jiska hw help

How do i change my user's color ?

299. ## math

square root the nearest integer. -85

300. ## Science

The time taken by the tip of second hand of a clock to move one full round on circular dial is 60 second. The speed of second hand is _____.

301. ## CHEMISTRY

WHEN 92.50 MOL HYDROGEN REACTS, WHAT QUANTIY (MOL) OF NITROGEN IS CONSUMED AND WHAT QUANTITY (MOL) OF AMMONIA IS PRODUCED?

302. ## Science

The time taken by the tip of second hand of a clock to move one full round on circular dial is 60 second. The speed of second hand is _____.

303. ## math

john is standing 100 metres away from a building.the angle of elevationto the top of the building is8 degrees .He now walks straight away from the building.When he stopes,the angle of elevation is only 1 degree and 48 seconds.How far away is now from the

304. ## U.S. History

What was the whole point behind the Hull House?? I read an article about it but did not understand

305. ## math

6 x(5+7)/4 - 7 X 3x3

306. ## FRUSTRATED

Hi! Do you know what the current population estimate, agriculture, and the mailing adress in the Acoma pueblo is? Please help! thank you!

307. ## language

How do you diagram this sentence? People still make potato flour today.

308. ## Math 116a

Evaluate a+b/9= A=51 and B=3 Would I substitute a and B to be 54 so is the answer 6?

309. ## Pre-Cal

Given the function f(x) = 2x^3 + 3x + 1, state the power function that it’s ends will resemble.

310. ## Math

how do you write the product of 16 and n

311. ## physics

A force is applied to a 2.5 kg mass and pro- duces 2.4 m/s2 acceleration. What acceleration would be produced by the same force applied to a 5.2 kg mass? Answer in units of m/s2

312. ## MATH help

a certain radioactive isotope has a half life of approx 1,300 years . How many years to the nearest year would be required for a given amount of this isotope to decay to 55% of that amount. So I am not sure where to put the 1,300 1,300=2600*e^t or

313. ## Math

-5/6x=-7/8 what is x? would it be 1/4? I don't know how to do this?

314. ## specific heat capacity

How much heat would be required to heat 1 gram of pure liquid water from 10C to 20C? How would i approach this problem?

315. ## chemistry

What is the maximum mass of H2 formed, when 0.380 g of aluminum are reacted with 55.0 mL of 8.00 M HCl? The other product is AlCl3

316. ## Math 116a

Find the slope X=-4 if it exists. Don't I need the Y to find a slope?

317. ## ENG

how to write a article review ?

318. ## Math 116a

solve using the addition and multiplacation principles 1+6x

what sentence can I write using the words pageant and restless?It also has to make sense.

320. ## math 116A

functions f(-1)=5x^2-3x 5(1)^2-3(-1)=28 correct I hope

321. ## Math

Against the wind, a small palne flew 900 miles in 9 hours. The return trip took only 5 hours. What was the speed of the wind ?

322. ## math

The number is even. Clue 2 The number is divisible by 3. Clue 3 The number is a multiple of 7? what is this?

323. ## statstics

a population of score has u=50 and standard devidation =10 if every score in the population is multipied by 2 the new mean and standard would be

324. ## math

name each no in two ways 62,000

325. ## Math 116 a

multiply -8/3*(-6/5)= would it be 48/15? I can remember how to multiply fractions help

326. ## science

in the following problem, one of the metric SI punctuation rules were broken, state the problem: 67 km

327. ## Math 116a

Collect Like Terms 15p+7q-4p-9q I get the answe 11p+2q/ I hope I am doing theis correctly.

328. ## planetary science

If I'm standing on the sun can I still see the phases of the moon

329. ## math

least common multiple of 20, 15, and 35

330. ## Math 116a

solve by elimination 5r-6s=18 6r-5s=46 The solution is There are infinitely many solutions there is no solution

19[7+w+(-2)]

332. ## math

how to divide 7 over 35?

what is the sequence for fibbinachi higher than 1,000,000?

334. ## math

is 0 a multiple of every number?

335. ## Math

I am having a problem understanding my homework. use the grid to draw a rectangle, then complete the calculation 23 x17 Help thanks

336. ## math

how many shelves measuring 8 in by 12 in can be made from a 36 in by 56 in plywood?

337. ## math

A farmer had a total of 22 men and horses living on it. There were a total of 72 legs. How many men and how many horses were present?

338. ## writing

i need to write a presidential order. but i need some topics to write about.

339. ## science

is wood waterproof?

340. ## math

how do i find the answer to this expression 1.4 over 5.5 subtract 4.9 over 2.0

341. ## math

23.6repeating find fraction notation

342. ## algebra

what is 6d-3d+2d=35

343. ## math

a gain of 8 dallors