# Questions Asked onNovember 24, 2014

1. ## chemistry

If you need to multiply the following reaction by 2 to be an intermediate reaction in a Hess's law problem, what would be the final value for the enthalpy of reaction you use for this intermediate reaction? C2H4 + 3 O2 2 CO2 + 2 H2O, H = -1410 kJ

2. ## U.S. History

which of the following was not a weakness of the articles of confederation (1781-1789)? A) a week "league of friendship" among the states B) the requirement of unanimous approval by all 13 states for amendments C) no judicial branch D) no congressional

3. ## College Physics

A weightlifter has a basal metabolic rate of 64.6 W. As he is working out, his metabolic rate increases by about 650 W. (a) How many hours does it take him to work off a 450 Calorie bagel if he stays in bed all day? (b) How long does it take him if he's

4. ## maths

a 4 cm long chord subtends a central angle of 60° . the radial segment of this circle is

Family Flowers employs 17 people, of whom 14 earn gross pay of \$640 each and 3 earn gross pay of \$720 each on a weekly basis. What is the employer

6. ## Math I need help ASAP! I'm getting timed

Which ratios form a proportion? 1. 4/12 , 6/8 2. 16/12 , 3/4* 3. 3/2 , 15/14 4. 10/16 , 5/8 Which ratio forms a proportion with 9/15? 1. 6/10 2. 16/21 3. 36/50 4. 45/70 A textbook weighs 2.5 pounds. How many kilograms does the textbook weighs? Round your

7. ## Language Arts

1.)Which of the following sentences contains parallelism? a.)We sold two bikes at the garage sale, and we also sold four chairs, as well as receiving offers for three lamps. b.)I prefer new things, but some people like to buy things that other people have

Joseph Palmer In 1830, a Massachusetts farmer named Joseph Palmer moved to the city, only to find that people continually reacted to him with anger and hatred. Why? Palmer certainly wasn’t an amoral man—no, he had a strong sense of right and wrong. He

9. ## Int.Science/laws of thermodynamics

Watch the heat engine animation in the lesson text above. Does this animation illustrate a "new and improved" heat engine? yes no

10. ## English

So i have to do this newspaper article about the lamb to the slaughter.. What would be a creative headline.. this is the situation i am doing it on.. The seemingly unsolved murder of Patrick Maloney is reported .

11. ## MATH

Al saves pennies . He agrees to give 1/3 of his pennies to Bev if she would give 1/3 of what she got from Al to Carl and if Carl in turn would give 1/3 of what he got from Bev to Danni. Bev, Carl and Danni agreed and recived 9 pennies. hOW MANY PENNIES DID

12. ## Math Physics

What is the wavelength in metres of an electromagnetic wave with a frequency of 10^14/s?

13. ## MAT201-Basic Statistics

A dealership sold 15 cars last month. The purchase price of the cars, rounded to the nearest thousand, is represented in the table Purchase Price/# of cars sold \$15,000 3 \$20,000 4 \$23,000 5 \$25,000 2 \$45,000 1 A.Find the mean and median B. Which measures

14. ## calculus

(i know i've asked so many questions. i just want to make sure my answers are right for this homework! hopefully it isn't too annoying for you :) ) Find the derivative of the given function. y=(tan^-1)√(3x) A. (1)/(√(1-3x)) B. (1)/(6√(3x(1+3x))) C.

15. ## math calculus

if i,j,k are the standard unit basic vectors, in 3 space, determine the value of k dot(j-3k)+(i-4k) dot (i-4k)-8 |i cross -k| (Simplify without using components)

16. ## soran university

1. Which salt is LEAST soluble at 0 ºC? 2. How many grams of sodium nitrate, NaNO3, are soluble in 100 g of water at 10 ºC? 3. When 50 grams of potassium chloride, KCl, is dissolved in 100 grams of water at 50 ºC, the solution can be correctly described

17. ## Spanish 1 question

How are lunch traditions changing in the Spanish-speaking world, and why?

18. ## chemistry 2

A certain laser uses a gas mixture consisting of 9.0 grams of Hydrogen chloride, 2.0 grams Hydrogen gas, and 165.0 grams of Neon. What pressure is exerted by the mixture in a 75.0 liter tank at 22 degree Celsius? Which gas has the smallest partial

19. ## physics

If an atom has an electron in the n = 5 state with ml = 3, what are the possible values of l?

20. ## Chemistry

How do I balance CuSO4 + NH3 + H2O = (NH4)2SO4 + Cu(NH3)4(OH)2 Thank you!!!

21. ## algebra

give the slop of each line and then determine whether two lines are parallel, perpendicular, or neither parallel nor perpendicular. 2x+5y=5, 4x+10y=0

22. ## physics

A disk with mass m = 5.2 kg and radius R = 0.44 m hangs from a rope attached to the ceiling. The disk spins on its axis at a distance r = 1.59 m from the rope and at a frequency f = 18.6 rev/s (with a direction shown by the arrow). 1. What is the magnitude

23. ## English

In American English, a collective noun used as a unit takes _____ verbs and pronouns. singular plural

24. ## Chemistry

A sample of toluene, C7H8 has a mass of 74.5 g. How many carbon atoms does it contain? How many hydrogen atoms does it contain? My work: I get 3.41 x 10^24 for carbon atoms And 3.90 x 10^24 for hydrogen atoms. Is this correct?

25. ## math

Ms.Johnson gives twice as much daily homework as Mr. Beach. Mr.Beach gives out 10 minutes less than Mrs.Rodriguez. if Mrs.Rodriguez gives 35 minutes of homework,what is the total amount of homework given by the three teachers? ---- So do you just half it

26. ## Chemistry

What is the pressure in a 22.1-L cylinder filled with 16.3g of oxygen gas at a temperature of 329K?

27. ## Uniform Motion

A certain fish requires 3 hrs to swim 15km downstream. The return trip upstream takes 5 hrs. What is the speed of the fish still in water? How fast is the current of the stream?

28. ## c++

You have been tasked to implement a program that manipulates a list of clients’ information. The client information consists of client’s phone number, first name, last name, and age. The list is not sorted in any particular order. Furthermore, you are

What are the dimensions of a rectangular tract of land if its perimeter is 70 kilometers and its area is 300 square kilometers? km (smaller value) akm (larger value)

30. ## Math

A worker uses 4gray tiles for every 5blue tile That he uses .if he uses 60gray tiles how many blue tiles does he use

31. ## Math - ratio

Mr. Rahim had the same amount of money in his three bank accounts at first. He deposited \$44 into account b and \$ 80 into account c. In the end, the ratio of the amount of money in account a to the amount of money in account c was 2:7. How much money was

32. ## physics

A 3.02 kg mass attached to a light string rotates on a horizontal, frictionless table. The radius of the circle is 1.2 m, and the string can support a mass of 33.8 kg before breaking. The acceleration of gravity is 9.8 m/s 2 . What maximum speed can the

33. ## physics

Question: Object A is moving at a maximum speed of 6m/s towards Object B. At 50 m away Object B accelerates from the approaching Object A at 0.3m/s^2. Does Object A catch up to Object B and if yes when? I don't know how to answer this at all or even which

34. ## now mr. damon, physics

A 63.8 kg block of silver is at initially at 107 C. 1.0 kg of ice at its freezing point is placed onto the block to cool it. As the ice melts, the water is free to flow off (so that the water never increases in temperature). After all the ice melts, what

35. ## Chemistry

For the reaction CaCO3(s)+ 2HCl(aq)= CaCl2(aq)+ CO2(g)+ H2O(l) how many grams of CaCl2 can be obtained if 14.6 g HCl is allowed in CaCO3?

36. ## math

a car traveling 8 m/s suddenly brakes to a complete stop. THe stopping time was .36 seconds. what is the acceleration of the car?

37. ## physics

Suppose that you have a masa os 45.7 kg and are standing on frictionless roller skates. Someone then throws you a 2.50 kg mass with a velocity of 14.5 m/s and you catch it. What will be your resultant velocity?

38. ## MATH!!

Joe and Susan invested \$1500 at Bank of America in 2000, at 4% compounded quarterly. In the year 2005 they moved to another city and took the total money from their investment added \$500 and invested in at Bank Bravo, at 5% compounded quarterly. a) What is

39. ## Math Help!

Which proportion can be used to solve the following percent problem? What is 50% of 70? A. x/70=50/100 B. x/50=70/100 C. 50/70=x/100 D. 70/x=50/100 Is the answer B? Thank you

40. ## English

1. It is not far from here. 2. It takes three hours from here to the station by car. --------------------------- Does "it" in each sentence have the same function? Does the "two it's" have the same grammatical role?

41. ## calculus

hello! i just needed help to verify or falsify my answer and any explanation as to why would be extremely helpful! thanks ahead of time. y=(x^2)-6x+10 a. at x=3 b. at x=0 c. at x=1 d. at x=-3 my answer was D. thanks again!

42. ## chemistry-naming

How do I name the following- C3H8? (the numbers are supposed to be subscripts) KCl?

43. ## Chemistry Physics

What frequency is heard by an observer who hears the 450 Hz siren on a police car traveling at 35 m/s away from her? Assume that the velocity of sound in air is 345 m/s. Is this the correct? 450*345/(345+35) =408Hz

44. ## chemistry physics

A car is traveling toward you at 40.0 mi/h. The car horn produces a sound at a frequency of 480 Hz. What frequency do you hear? Assume that the sound velocity in air is 1090 ft/s. Do I need to convert ft/s to m/s?

45. ## math

Determine the value of k for which the direction vectors of the lines x-1/k = y-2/2 = z+1/k-1 and x+3/-2 = z/1, y=-1 are perpendicular.

46. ## math

On a highway, lighting poles are 50m apart. How many lighting poles will be passed by a bus that is moving at a speed of 45kmph in 4 hours.

47. ## Chemistry

The equilibrium constant for the reaction H2 + I2 --> 2HI, is 54 at 425 degrees C. If the equilibrium mixture contains 0.030 M HI and 0.015 M I2, calculate the equilibrium concentration of H2.

48. ## Chemistry

how many Kj of heat are evolved when 6g of pure carbon is completely burned? how many grams of carbon must be burned to furnish 39.3 kJ of heat. enthalpy of combustion of carbon is -393.5

49. ## physics

it takes about 560 kilowatts to run a diesel locomotive at speed around 180km/h.Magnetically levitated trains(mag levs) on the other hand require less power because the magnetic levitation eliminates energy loss to friction.The worst maglev system requires

50. ## algebra

Perform the indicated operation y/y-5+5/5-y

51. ## Chemistry

A sample of toluene, C7H8 has a mass of 74.5 g. a) how many molecules does the sample contain? b) How many carbon atoms does it contain? How many hydrogen atoms does it contain? My work For b would it be 7 carbon atoms and 8 hydrogen atoms

52. ## physics

is it possible to a have a percentage difference of zero in physics

53. ## trig

solve each equation if 0 < x < 2pi. answer must be in radians 1. 4 cos x - 2 = 0 2. 3 sec^2 - 4 = 0

54. ## ratios and proportional relationships

if a tiger eat food that weights up to 15% of its body weight and it eats 75 pounds of food how much does the tiger weigh

55. ## statistics

from the following list of numbers of discharges each day in september, compute the mean, mode, and range.

56. ## Algebra

y=-2/3+2;(9,3) and y=1/4*-2;(8,-1) what are the steps in solving this equation and what does it mean for on line to be perpendicular or another?

57. ## calculus

Me again. One last question! Again, just needed my answer verified with any explanation or walk-through. The position of a particle moving along a coordinate line is s=√(3+6t) with s in meters and t in seconds. find the particle's acceleration at t=1

58. ## math

change the following mixed numbers to a fraction in the forma/b were a and b are integers 3 5/6 ?

59. ## chemistry

What mass of AuCl3 contains 160.9 g of gold? My work i got 104.6 g is that correct

60. ## Physics

The speed of a transverse wave on a string is 18 m/s when the tension is 3.0 N. What tension is required for the wave speed along the string to be 19 m/s? Answer in Newtons.

61. ## Social Studies

Which of the following is the largest ethnic group in china A.Han B.tibetan C. Uighurs D. Hui Which of the following is the staple crop of the north China plain A. Barley B. Rice C. Soybeans D. Wheat Crops grow well on the north China plain because the

62. ## Physics

A 4.40kg block hangs from a spring with spring constant 2160N/m . The block is pulled down 4.60cm from the equilibrium position and given an initial velocity of 1.40m/s back toward equilibrium. A) What is the frequency of the motion? B) What is the

63. ## physics

Calculate the radius of a “super- Earth” with 10 times the mass of Earth, using Earth data as a starting point.

64. ## eng

which one of the following fragments is a prepositional phrase

65. ## Math

Tom Invested \$7,000 at 6.5% interest compounded monthly. How much will be in this account after 18 months?

66. ## Math

You invest \$5,000 at 3% monthly for 15 years. How much interest will you earn?

67. ## physic 2210

A pulley (a soild disk) with mass 2kg and radius 0.3 m is attached by massless rope to two blocks of masses m1=1kg and m2=3 kg. what is the acceleration of block 1 after the system is realeased from rest?

68. ## English

What is an example of morbidity in "The Fall Of the House of Usher" by Edgar Allan Poe ? I know what morbidity is but it's hard finding an example in the story so can you please help me find an example of it.

69. ## Question

What four songs can I select to explain the heritage and the popular culture of the United States? Or lead me in the direction of understanding moe into what the heritage and popular culture is

70. ## MATH

{56.0/25}+1-100=

71. ## physics

A thin rod (uniform density & thickness) has mass M and length L. It is attached to the floor at a fixed location by a friction-less hinge. The rod start at rest, balanced vertically on its hinge end. ______________________________________ 1) While

72. ## Math Physics

What is the wavelength of an electromagnetic wave with frequency 50.0 MHz? Am I starting this problem like this? 3.00*10^8/50*10^6 =6*10^12

73. ## Chemistry Physics

What is the wavelength of an electromagnetic wave with frequency 50.0 MHz? Am I starting this problem like this? 3.00*10^8/50*10^6 =6*10^12

74. ## English

My teammates and___ practice every day after classes are over. a.I b.me c.my d.us I am think a ___ said in our orientation that we much make our decisions about how we are going to make a difference. A.It B.Our Leader C. They D. Them I am think B ____of my

75. ## MATH

Janet dreams to go on vacation in three years. How much should she invest now so that she will have \$15,000 by that time if the account earns 1 3/8% compounded quarterly?

76. ## Chemistry

Provide the name(s) for the branched constitutional isomer(s) with the molecular formula C7H16 that have three methyl groups.

77. ## Beryl

Pb3(ASO4)2.the solubility product expression

78. ## physics

Elephants communicate via infrasound, at frequencies as low as 14 Hz that can travel up to 10 km. The intensity of these sounds can reach 103 dB, measured a distance of 5.0 m from the source. Determine the intensity level of the infrasound 10 km from the

79. ## English

I just went to buy some groceries to cook supper when I come home to see my beloved husband on the floor. I was shocked and horrified to even think what happened. Can someone check if my grammar, punctuation is alright? Also can someone help me to make my

80. ## Chemistry Physics

What is the wavelength in metres of an electromagnetic wave with a frequency of 10^14/s?

81. ## physics

An airplane of mass 1.30 104 kg is moving at 52.0 m/s. The pilot then increases the engine's thrust to 7.00 104 N. The resistive force exerted by air on the airplane has a magnitude of 3.00 104 N.

82. ## Chemistry

A sample of lithium sulfate, Li2SO4, contains 6.78 x 10^23 formula units. a) How many moles of Li+ ions are there in the sample? b) How many moles of ions are there in the sample? My work. I think a) is 2.26 is that correct?

83. ## Astronomy

Does the probability that a single-planet system shows transits increase, decrease or stay the same if the planet has a rather small or a rather large semi-major axis?

84. ## Brief Calculus

Find the area of the indicated region. We suggest you graph the curves to check whether one is above the other or whether they cross, and that you use technology to check your answer. Between y = −x and y = −x^3 for x in [−1, 1]

85. ## Astronomy

Given the random orientation of planetary orbits relative to our line of sight, do you expect most or only a minority of all planetary systems to show transits?

86. ## Problem Solving

the average giant pacific octopus weighs about 75 pounds. the largest octopus ever found weighed 8 times this amount. how much did the largest octopus weigh

87. ## Pre-Calc/Trig

is the integer n odd or even, explain

89. ## math!!

mike and sam begin saving money at the same time. mike plans to save \$3 a month and sam plans to save \$8 a month. After how many months will sam have \$25 more than mike?

90. ## physics

on the surface of planet y, which has a mass of 4.38 x10^24 kg, an object has a weight of 50.0 N and a mass of 30.0 kg. What is the radius of this planet?

91. ## physics

Two sounds have measured intensities of I1 = 102 W/m2 and I2 = 408.00 W/m2. By how many decibels is the level of sound 1 lower than that of sound 2? Answer in dB

92. ## Astronomy

How do astronomers know whether they are seeing planets or stars when they are distant?

93. ## pt1420

if the expression is false, the_____ operator will return true.

94. ## c++

#include #include using namespace std; string getClientDatabase(); int main() { string data = getClientDatabase(); // TODO: // Implement a function that parses clients data into proper containers // Implement a function that finds the youngest client //

95. ## College Physics

(a) How many hours does it take him to work off a 450 Calorie bagel if he stays in bed all day? (b) How long does it take him if he's working out? 2 h (c) Calculate the amount of mechanical work necessary to lift a 126 kg barbell 2.10 m. 3 J (d) He drops

96. ## physics

A 63.8 kg block of silver is at initially at 107 C. 1.0 kg of ice at its freezing point is placed onto the block to cool it. As the ice melts, the water is free to flow off (so that the water never increases in temperature). After all the ice melts, what

97. ## math

A cone is made from the figure shown by joining the straight edges and securing them with tape, calculate the angle of inclination, to the nearest tenth of a degree, for the side of the cone.

98. ## physics

A weightlifter has a basal metabolic rate of 64.6 W. As he is working out, his metabolic rate increases by about 650 W. (a) How many hours does it take him to work off a 450 Calorie bagel if he stays in bed all day? (b) How long does it take him if he's

99. ## Spanish

What is a bodegón? What is its significance?

100. ## math

36-9/{(0.24*5)+(0.66*5)}

101. ## Physics

A guitar string has a mass of 30g and length of 2m. Find the tension if its density is 0.2kg/m^3

102. ## Chemistry Homework Help

d 25 ml of 0.15 M HCL solution be added to 250 mL of buffer solution containing 0.25M HF Ka-7.1 x 10, and 0.40 M NaF at a pH of 3.15 what is the new pH?

A 63.8 kg block of silver is at initially at 107 C. 1.0 kg of ice at its freezing point is placed onto the block to cool it. As the ice melts, the water is free to flow off (so that the water never increases in temperature). After all the ice melts, what

104. ## government

three types of political party systems and how they affect governing

105. ## liberal arts

A turtle is at the bottom of a 13 foot well. Each day it crawls up 5 feet, but each night it slips back 3 feet. After how many days will the turtle reach the top of the well?

106. ## Chemistry

Should 25 ml of 0.15 M HCL solution be added to 250 mL of buffer solution containing 0.25M HF Ka-7.1 x 10, and 0.40 M NaF at a pH of 3.15 what is the new pH?

107. ## math

the find the volume of a pyramid that has a slant height of 176cm and a square base with area 9.00m

108. ## physics (would mr. sue or mrs damen answer my ques

A 63.8 kg block of silver is at initially at 107 C. 1.0 kg of ice at its freezing point is placed onto the block to cool it. As the ice melts, the water is free to flow off (so that the water never increases in temperature). After all the ice melts, what

109. ## Social Studies Grade 6

What are the definition for rural decline, spatial inequality, standard of living, and urbanization. Please help me! Thank you a sixth grader Susie

What does the second law of thermodynamics say about entropy? A. Only changes in entropy can be measured. B. The entropy in a system is zero at equilibrium. C. The entropy in a system and its surroundings tends to increase. D. Entropy cannot be created or

111. ## Social Studies Grade 6

Here are the instructions!(: Copy a symbol or an illustration to represent each item. Write a definition of each term in your own words. Write a sentence that includes the term and the words Mexico City. Thank you!(:

112. ## Algebra math Question

Find the dimensions of the rectangle meeting the specified conditions. The perimeter is 20.4 millimeters and the length is 2.4 times the width. (Round your answers to one decimal place.) width mm length mm

113. ## statistics

your medical terminology instructor listed the following grades for the class out of a 75-point: 33,34,43,45,45,54,59,60,62,64,66,67,68, 67,68,68,69,70,70

114. ## algebra

mrs scott bought some silk at \$29.50 a yard and had \$12 dollars left. if she had bought twice as much silk at \$19.75 cent a yard she would have need \$28 more to pay for it. how many yards did she buy and how much money had she

115. ## algebra

Soybean meal is 14% protein, cornmeal is 7% protein. how many pound of each should be mixed together in order to get 280-lb mixture that is 13% protein?

116. ## Chemistry

If 35.0 mL of 0.210 M HCl reacts with excess Mg, how many mL of hydrogen gas are produced at STP? Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g) Is the answer 0.8176 L Convert moles of HCl: 2.10 x 0.035= 0.00735 mol of HCl Convert to moles of H2: 0.0735 x 1 mol

117. ## Chemistry

A sample of lithium sulfate, Li2SO4, contains 6.78 x 10^23 formula units a) How many moles of Li+ ions are there in the sample b) How many moles of ions are there in the sample

118. ## O-Chem

Write the structural formula of a compound with an unbranched chain of five carbon atoms that is an alkenoic acid.

119. ## Chemistry Homework Help Please!

1.) Quantify the pH for a solution prepared by dissolving 0.050 moles of Acetic Acid (CH3COOH) and 0.20 moles of Sodium Acetate (CH3COONa) in water and adjusting the volume to 500 mL. The pka for Acetic Acid (CH3COOH) is 4.75. 2.) Should 0.010 moles of

120. ## Chemistry

Provide the name(s) for the branched constitutional isomer(s) with the molecular formula C7H16 that have three methyl groups.

121. ## physics

calculate minimum effort required to move load of 39 Newton in inclined plane whose length of slope is 39m ,height is 5m, distance from the base is 12m?

122. ## Math

Find the volume of a right circular cone with base diameter 12.0 m and slant height is 10.0m . Round to the nearest whole

123. ## Algebra

99 inch pipe is cut into two pieces. One is two times the length of the other. Find the lengths of the two pieces

124. ## Algebra math Question

Find the dimensions of the rectangle meeting the specified conditions. The perimeter is 352 feet and the length is 4 1/2 times the width. width ft length ft

125. ## Math Help!

ALice plays basketball. In one game she shoots 21 free throws and makes 81.25% of them. Estimate how many free throws she makes. A. About 16 B. About 2 C. About 20 D. About 14 Is the answer A? Thank you

126. ## math

A letter is chosen at random from the word EXTRATERRESTRIAL. Find the probability of the given event. (a) The letter A is chosen.

127. ## Math

Student budgeted a \$25 a month for phone service. If the telephone company charges \$18 a month for basic service and \$.05 a minute for each long distance call, how many minutes can be spent on long distance calls each month?

128. ## poetry ! help

I'm confused on how to write a sonnet poem. ( I searched for some examples but there just way to confusing) any examples? Thanks:)

129. ## Math

chris cuts half a rectangular lawn, 40m by 30m, by mowing strips of equal width around the perimeter. Jerri cuts the small rectangle left. How wide a stripe does Chris cut so they share the work equally

131. ## physics

calculate the number of kilocalories needed to climb 232 stair steps (116 steps per minute for 2 min.) climbing stairs (116/min.) = energy consumption rate is 9.8 (kcal/min)

132. ## math

Ron has \$1.35 in dimes and quarters in his pocket. If there are twice as many dimes in his pocket as quarters, how many quarters does he have?

133. ## Essay Excerpt Edit

Can someone edit this? Please be forewarned that its a first draft so I am aware that it is not developed yet. Any feedback would help a lot. Clearly, Jason Russell's Kony 2012 campaign proves how YouTube has altered our understanding of creativity from

134. ## math

Ron has \$1.35 in dimes and quarters in his pocket. If there are twice how many quarters does he have?

135. ## Physics

A ball is thrown horizontally with a velocity of 40 m/s from the top of a building. Find its velocity and displacement after 3 s.

136. ## Earth Science

Describe the difference in evolution between a supercell that develops in an environment with unidirectional wind shear and a supercell that develops in an environment with veering winds. What is causing this difference in evolution? THANKS!!

137. ## MATH!

Barbara invested \$12,300 at the Midtown Credit Union at 6% compounded monthly for 7 years. What is the effective rate of this investment?

138. ## Algebra

A small software company invests \$30,000 to produce a software package that will sell for \$64.95. Each unit can be produced for \$42.25. (Round your answers to the nearest whole number.)

139. ## math

if the perimeter of an equilateral is 24 inches find a side of the triangular

140. ## physics

How much power is developed by a jumbo jet that cruises at 250 m/s. When the trust of its engine is 100,000N?

141. ## Math Help!

The bill at a restaurant is \$100, and Mrs. Johnson wants to leave a 15% tip. Approximately how much money should she leave? A. About \$5.00 B. About \$10.00 C. About \$15.00 D. About \$20.00 Is the answer C? Thank you

142. ## physics

Please Help!! How much power is developed by a jumbo jet that cruises at 250 m/s. When the trust of its engine is 100,000 N? Thanks!!!

143. ## math

Carina has twice as many quarters as dimes. If she has \$3.60, how many quarters does she have?

144. ## Physics

A 250kg box is pushed horizontally with a force of 750 Newtons. If the coefficient of friction is 0.25, calculate the net acceleration of the crate. I am confused how I am to find the net acceleration. I solved to find FN and FG is 2452 N is that correct

145. ## Math

Probability Question: A college student claims that she can identify 3 different types of cheese by taste. An experiment is set up to test her ability. She is blindfolded and given three pieces of cheeses, each representing a different brand. What is the

146. ## physics

A ball player hits a home run, and the baseball just clears a wall 17.6 m high located 122.0 m from home plate. The ball is hit an an angle of 35° to the horizontal, and air resistance is negligible. Assume the ball is hit at a height of 1.1 m above the

147. ## English

Choose the statement which is not suitable for the passage above? 1. "I" didn't have breakfast. 2. "I" usually get up late. 3........ 4......... 5........ -------------------------- Why is the quotation mark is used as in "I"? What is the role of the

148. ## CHEMISTY HOMEWORK HELP ASAP

1.) Quantify the pH for a solution prepared by dissolving 0.050 moles of Acetic Acid (CH3COOH) and 0.20 moles of Sodium Acetate (CH3COONa) in water and adjusting the volume to 500 mL. The pka for Acetic Acid (CH3COOH) is 4.75. 2.) Should 0.010 moles of

149. ## engineering

haw calculat the deflated trisection

150. ## Chemistry

2 ml of stock antibiotic (64 mg/ml) was diluted into a test tube containing 2 ml of broth (final volume is 4). A series of 2-fold SERIAL DILUTIONS were performed by transferring 2 ml to three other tubes, consecutively (final volumes now 2 ml in each

151. ## calculus

hello! i just needed help to verify or falsify my answer and any explanation as to why would be extremely helpful! thanks ahead of time. y=(x^2)-6x+10 a. at x=3 b. at x=0 c. at x=1 d. at x=-3 my answer was D. thanks again!

152. ## Microbiology

2 ml of stock antibiotic (64 mg/ml) was diluted into a test tube containing 2 ml of broth (final volume is 4). A series of 2-fold SERIAL DILUTIONS were performed by transferring 2 ml to three other tubes, consecutively (final volumes now 2 ml in each

153. ## English

What are the steps to make a good essay?

154. ## Science

2 ml of stock antibiotic (64 mg/ml) was diluted into a test tube containing 2 ml of broth (final volume is 4). A series of 2-fold SERIAL DILUTIONS were performed by transferring 2 ml to three other tubes, consecutively (final volumes now 2 ml in each

155. ## physics /astronomy

If a system has multiple planets all in the exact same orbital plane, does the transit of one planet imply that all planets in the system must transit as well?

156. ## caculus

Evaluate the indefinite integral. ∫(arcsinx)^6/(1−x^2)^(1/2)dx

157. ## math,trigonometry

a 35-foot long ladder is leaninig against the wall of a building. how far from the ground is the top of the ladder and how far from the base of the buildings is its foot if it makes a 20° angle with the wall ?

158. ## Calculus

2) If f(x)=∫t^2dt on the interval from 4 to x^3 then f′(x)=?

159. ## Math Help!

What percent of 50 is 15? A. 4% B. 25% C. 30% D. 15% Is the answer C? Thank you

160. ## Calculus

4) On the integral from 1 to 2 ∫(4x^2+4)/x^2dx =?

161. ## Math 3371

In a certain year, 26% of all teenagers in the United States had checking accounts. Your bank, TeenChex Inc., is interested in targeting teenagers who do not already have a checking account. (a) If TeenChex selects a random sample of 3,000 teenagers, what

162. ## grammar

Which is a similie? A) riding like the wind or B) looked like they had come from far

163. ## Calculus

5) Evaluate the definite integral. On the integral from 1 to e^7 ∫dx/x(1+lnx)=?

164. ## Math with business apps

Tom invested \$7,000 at 6.5% interest compounded monthly. How much will be in this account after 18 months?

165. ## math physics

What frequency is heard by an observer who hears the 450 Hz siren on a police car traveling at 35 m/s away from her? Assume that the velocity of sound in air is 345 m/s. Is this the correct? 450*345/(345+35) =408Hz

166. ## English

Can someone please explain what "cultivating a winning personality" means? Thank you :D

167. ## Math Help!

30% of 60 is what number? A. 15 B. 30 C. 18 D. 40 Is the answer C? Thank you

168. ## Math with business apps

You invest \$5000 at 3% compounded monthly for 15 years. How much interest will you earn?

169. ## data

I am looking for the school report each year regarding school violence and vandalism? I can not find this information on the internet, can you help me? Missouri school report.

170. ## math

Jane had \$7 and her sister had \$2. Their parents gave each of them an equal amount of money. Then, Jane had twice as much money as her sister. How much money did their parents give each of them

171. ## Math with business apps

How much should be invested at 6% compounded monthly so that the investment will be worth \$20,000 in six years?

172. ## social studies

When France gave up control of Vietnam in 1954, which group gained control of North Vietnam and which group took charge of South Vietnam? 1 Cambodian forces gained control of North Vietnam and Laotian forces took charge of South Vietnam 2 Communist forces

173. ## Chemistry

What is the concentration of sodium phosphate contains 0.60 M Na+? I'm not sure what to do and how to figure how to do this question.

174. ## Health 2

Gonorrhea is spread through ________. A. semen, !@#\$%^&l fluid and kissing B. semen and !@#\$%^&l fluid C. semen, !@#\$%^&l fluid, and sharing cups D. semen, !@#\$%^&l fluid, kissing and sharing cups B?

176. ## Math

Determine the linear velocity of an object with an angular velocity of 8.1 radians per second at a distance of 10 centimeters from the center. Use pi. Round the answer to the nearest tenth. I got 47, is this correct?

177. ## Math Help!

Mrs. Miller sells a house for \$179,000. If she earns a commission of 6%, how much money does she earn? Write a porportion and show your work. My answer 179,000/100=x/6 107400=100x 10,740=x Am I right? Thank you

178. ## program design

Create the logic for a program that continuously prompts a user for a numeric value until the user enters 0. The application passes the value in turn to a method that computes the sum of all the whole numbers from 1 up to and including the entered number.

179. ## Math

Given TriangleABC with a = 9, b = 15, and m

180. ## statistics

In a correlation study, we seek to determine; *if the IV cause an outcome in the DV. *Which variable is the cause and which variable is the effect. *The direction of causation. *How well one variable predicts another variable.

181. ## Math

Given TriangleABC with a = 9, b = 15, and m

182. ## Math

Given TriangleABC with a = 9, b = 15, and m

183. ## Social studies

How does elevation affect settlement distrubations

184. ## Social studies

How does temperature affect settlement distribution?

185. ## Math

Which ratios does NOT form a proportion? 1. 24/96 , 27/108 2. 17/102 , 12/70 3. 21/51 , 35/85 4. 45/75 , 63/105 Which ratios form a proportion? Use cross products to test each pair. 1. 9/17 , 27/50 2. 12/35 , 24/75 3. 15/55 , 33/ 121 4. 12/35 , 20/70 Which

186. ## Chemistry 211

Which of the following statements is a reasonable explanation for why a percent yield may be less than 100% for the synthesis of the alum, select all that apply. a) The aluminium foil did not completely react b) Some alum sample remained in the beaker and

187. ## chem/science

A piece of an aluminum can was cut into small pieces. Then 0.422 g of the chips from the can was used to prepare potassium alum according to the procedure we used. Calculate the theoretical yield (in g) of potassium alum that could be obtained in the

188. ## Calculus

6) Evaluate the indefinite integral. ∫cosx/(7sinx+35)dx

189. ## Calculus

9)Evaluate the indefinite integral. ∫x^8e^(x^9)dx

190. ## Calculus

10) Evaluate the integral by making the given substitution. ∫sec(5x)tan(5x)dx u=5x

191. ## Chemistry

In 250 mL of a 0.35 M solution of NaOH, there are how many grams of NaOH?

192. ## Calculus

11) Find the following indefinite integrals. ∫x/(x+9)^(1/2)dx

193. ## Pre algebra

My problem says The cost of a cell phone for one month is a linear function of the numbers of minutes used. The total cost for 20, 35, and 40 additional numbers Re shown. Then it gives a table where it's 20/48\$, 35/54\$ and 40/56\$ The first question is ,

194. ## math

A and B together can make a wall in 60 days. A has worked for 12 days, B finishes the remaining work in 36days. How many days will B take to finish the whole work alone?

195. ## Chemistry

A sample of lithium sulfate, LiSO4, contains 6.78 x 10^23 formula units. a) How many moles of Li+ ions are there in the sample? b) How many moles of ions are there in the sample? My work: I think a) is 2.26 moles And b i am not sure

196. ## history/engllish-thesis

I need help writing a thesis for my history day project, my person is Sacagawea and this years theme is leaders and their short and long term legacies. I don't exactly know where to start. Sacagawea has played a big role in the discovery of Louisisana

197. ## math

The speeds of two trains A and B are in the ratio of 5:6. A takes 36 minutes more than B to reach the destination.what is the time taken by A to reach the destination to cover the same distance?

198. ## Primary Sources Search Help

I'm looking for primary sources from when Sacagawea was alive that relate to her in some way Otherwise any tips for finding primary sources?

199. ## calculus

A) Determine the vector equation of the plane that contains the following two lines: l1: vector r= [4,-3,5] + t[2,0,3], tER l2: vector r= [4,-3,5] + s[5,1,-1], sER b)Determine the corresponding Cartesian equation.

200. ## Algebra

A small software company invests \$30,000 to produce a software package that will sell for \$64.95. Each unit can be produced for \$42.25. (Round your answers to the nearest whole number.) (a) How many units must be sold to break even? units (b) How many

201. ## Pre-Calc/Trig

Help me please, I don't understand this write using exponential notation √ 36* 3√ 64 oh and 3 is an exponent

202. ## int.science

The earth can be considered a heat engine because it receives heat from the sun and converts it into mechanical energy to produce winds and evaporate water. True False

203. ## Spanish

May I get my biographic essay of Pablo Neruda proofread? I need to see if it actually makes sense and all my verb tenses are correct. Pablo Neruda es un poeta chileno famoso. Ricardo Eliecer Neftalí Reyes Basoalto Neruda nacío en 1904. Su madre murió

204. ## MAT201 Basic Statistics

A dealership sold 15 cars last month. The purchase price of the cars, rounded to the nearest thousand, is represented in the table Purchase Price/# of cars sold \$15,000

205. ## chemistry

I just need a definitive answer because I've searched everywhere and it's made me second guess my original answer. How many valence electrons does copper have? I thought it was one but now I'm unsure. I know it's electron configuration is [Ar]4s1 3d10, so

206. ## American history

I have to answer these questions: 5. Compare the viewpoints of the senators in the Versailles Treaty. 6. What was the final outcome of the Treaty of Versailles for the United States? 7. How was the map of Europe and the Middle East transformed as a result

207. ## Calculus

What does y'' mean in calculus? Is there a word for it? Also is there a word for f'(x)? Thanks.

What mass of pure silver would you obtain from 85.0 g of AgNO3? I got 53.55 g is that correct?

210. ## INTSCIENCE

The earth can be considered a heat engine because it receives heat from the sun and converts it into mechanical energy to produce winds and evaporate water. True False

211. ## math

Caroline runs 3 and one half miles in 221 over 4 minutes. How many miles does she run per minute?

212. ## science

how many moles of oxygen gas are necessary to form 0.737 moles of carbon dioxide

213. ## chemistry

0.195 m of ca oh 2 solution to neutralize 750 ML of a 0.235 m of hno3 and balance it

214. ## Math

As a savings plan for college, when their son Bill was born, the Johnson's deposited \$10,000 in an account paying 4% compounded quarterly. How much is this account when Bill is 18 years old?

215. ## physics

we did a lab and my observation chart is like this when my mass is 1.4 kgs (height is 0.12m,distance is 1.0m,time is 0.87s,velocity is 1.1 m/s ,Eg is 1.6 and the Ek is 0.85) when my mass is 2.14 kgs(height is 0.12m,distance is 1.0m,time is 0.88s,velocity

217. ## accounting

On October 10, 2010, Mason Engineering Company completed negotiations on a contract for the purchase of new equipment. Under the terms of the agreement, the equipment may be purchased now or Mason may wait until January 10, 2011, to make the purchase. The

218. ## MATH

In a fraternity with 38 members , 18 take math, 5 take both math and literature and 8 take neither math or literature. how many take literature but not math? I came up with 16 is that correct or am i lost ?

219. ## math

The ratio of boys to girls on the bus is 20/15

220. ## Algebra

find the domain and range of y=f(x) {4 if -6

221. ## physics

A harmonic wave is traveling along a string. If the oscillator that generates the wave completes 23 vibrations in 18.50 seconds and if it takes a crest 20.21 seconds to travel 168 cm along the rope. What is the wavelength of the wave? Answer in cm.

222. ## Chemistry

Calculate the S(univ) for the following phase change at 25 deg celcius. The boiling point of heptane is 98.0 Celcius and has a Delta Hvap= +21.6kj/mol. C7H16(l)--> C7H16(g) Delta S= +79.0j/k I know that the equation is Delta Suniv= DSsys + DSsurr PLEASE