# Questions Asked onFebruary 26, 2013

1. ## calculus 1

A kite 100 ft above the ground moves horizontally at a speed of 10 ft/s. At what rate is the angle (in radians) between the string and the horizontal decreasing when 200 ft of string have been let out?

2. ## Chemistry

A certain indicator, HA, has a Ka value of 1.3 × 10-6. The protonated form of the indicator is blue and the ionized form is red. What is the pKa of the indicator? What is the color of this indicator in a solution with pH = 8? Blue, red, or purple?

3. ## math

Generate the first five terms in the sequence using the explicit formula. cn= 12n – 11 (1 point)

4. ## math

What is the third quartile, Q3, of the following distribution? 10, 25, 18, 31, 16, 27, 5, 13, 32, 24, 15, 21, 18, 18, 24, 4, 8, 11, 11, 23

5. ## Physics

A spherical concave mirror has a raduis of curvature of 6.0 cm. At what distance from the mirror should a 6.0 cm object be placed to obtain an image that is 48 cm tall?

6. ## physic

a resistor has a voltage of 6.65 V and a current of 4.45 A. it is placed in a calorimeter containing 200g of water at 24 degree Celsius. the calorimeter is aluminum (specific heat= 0.220 cal/g-Celsius), and its mass is 60g. the heat capacity of the

7. ## math

Money is invested in a savings account at 3.4% simple interest. After 1 year, there is \$1695.76 in the account. How much was originally invested?

8. ## Algabra 1

Need help stuck on question. Find the range of f(x)=3g-5 for the domain (-1.5,2,4) A- (-8,10,-1,-1) B- (-9.5,1,7) C- (8,10,1,1) or D- (9.5,-1,-7)

9. ## Math

The elephants at the zoo are fed 1/2 barrel of corn each day. The buffalo are fed 7/10 as much corn as the elephants. How many barrels of corn are the buffalo fed each day?

10. ## PHYSICS 1 ..'''''''''''''''''''''''' helllpppppppp

A girl of mass (Mg) is standing on a plank of mass (Mp). Both are originally at rest on a frozen lake that constitutes a frictionless, flat surface. The girl begins to walk along the plank at a constant velocity (vgp) to the right relative to the plank.

11. ## math

How long is a rectangular strip of land with a width of 5/4 km and an area of 3/4 square km ?

12. ## Chemistry

Comment on the relative acidities of h3po4 and the h2po4 ion? I don't understand what this question is asking? Would H3PO4 is a strong acid and will completely dissociate into ions in aqueous solution suffice?

13. ## AP Chem

For the following equilibrium system, which of the following changes will form more CaCO3? CO2(g) + Ca(OH)2(s) CaCO3(s) + H2O(l) deltaH(rxn) = -113 kJ My choices are: a) Decrease temperature at a constant pressure (no phase change) B) Increase volume at a

14. ## Math

Javia ran 8 laps around a track to run a total of 1 mile on Monday. How many laps will she need to run on Tuesday to run 3/8 of a mile?

15. ## chemistry 1B

1-propanol (P1° = 20.9 Torr at 25 °C) and 2-propanol (P2° = 45.2 Torr at 25 °C) form ideal solutions in all proportions. Let x1 and x2 represent the mole fractions of 1-propanol and 2-propanol in a liquid mixture, respectively, and y1 and y2 represent

16. ## physics

A canon mounted on a pirate ship fires a cannonball at 125 m/s horizontally, at a height of 17.5m above the ocean surface. Ignore air resistance. (a) How much time elapses until it splashes into the water? (b) How far from the ship does it land?

17. ## math

Trent earned \$28,500 last year. He paid \$8,265 for rent. What percent of his earnings did Trent pay for rent

18. ## Geometry

1. Find the diameter of a circle with a circumference of 50 mm. Round your answer to the nearest tenth. a) 16.0 mm b) 26.4 mm c) 8.4 mm d) 33.5 mm 2. Find the area of the circle with the given radius or diameter. Round your answer to the nearest tenth.

Please check my answers. The answers are at thebottom. 11. Choose the most logical sentence completion. Yo _______ el libro a la biblioteca. vuelvo devuelvo puedo duermo 12. Choose the most logical sentence completion. Ellos __________ en el café. cuestan

20. ## Chemistry

The triprotic acid H3A has ionization constants of Ka1 = 6.8× 10–3, Ka2 = 8.1× 10–9, and Ka3 = 5.0× 10–12. Calculate the following values for a 0.0760 M solution of NaH2A [H+] = ? [H2A-]/[H3A]= ? Calculate the following values for a 0.0760 M

21. ## Math

a group of 100 students took a quiz. Their average score was 76 points. If the average score for boys was 80 points and the average score for girls was 70 points, how many girls participated in the quiz

22. ## Physics

A long jumper leaves the ground with an initial velocity of 12 m/s at an angle of 28-degrees above the horizontal. Determine the time of flight, the horizontal distance, and the peak height of the long-jumper.

23. ## Chemistry

What fraction of piperazine (perhydro-1,4-diazine) is in each of its three forms (H2A, HA–, A2–) at pH 7.22?

24. ## Algebra

the length of a rectangular piece of land is 40 cm more than two times its width. the perimeter is 680 cm. Find its dimensions

25. ## Physics true false

true false The speed of a particle is always positive. True False The average speed of a particle is equal to the magnitude of its average velocity. True False The acceleration of a particle can be non-zero when its speed is constant. True False When the

26. ## science

7750 Joules of energy is added to a 325 grams stone at 24.0 degrees centigrade. The temperature increases by 75.0 degrees centigrade. What is the specific heat of the stone?

27. ## english

What is a personification expression for hands on a clock?

28. ## Chemistry

In the formula 2C4H10+13O2=10H2O+8CO2 whats the mass of butane needed to produce 79.7g of carbon dioxide.

29. ## Physics--PLZ HELP!

When the switch is closed in a circuit, the wire between the poles of the horseshoe magnet deflects upward. From this you can conclude that the left end of the magnet is ---- -- -- -- -- -- -- A) a magnetic dipole. B) not contributing to the wire's

30. ## math

Triangle GHI is an isosceles triangle. H is the vertex. If the measure of H is 73 degrees what is the measure of G? A.73 B.17 C.34 D.104 A)73 degrees?

31. ## MATH

a rule of thumb used by car dealers is that the trade in value of a car decreases by 20% of its value each year. suppose the initial value of your car is \$23,500. write an equation expressing the trade in value of your car as a function of the number of

32. ## math

Write the decimal for each of the following: 1.) two and fifteen hundredths = 2.15 2.) sixty-six hundredths = 0.66 3.) four and eight hundredths = 4.08. 4.) one and thirty five hundredths. =1.35 5.)ninety nine hundreths = 0.99 6.) seven and twenty

33. ## statistics

Suppose a random sample of 80 measurements is selected from a population with a mean of 65 and a variance of 300. Select the pair that is the mean and standard error of x.

34. ## shbhvghs

What is the direction of the total electric field at any point on the axis where

35. ## math

1.) \$850 plus 8% on sales of \$8,000 2.) \$1,200 plus 4.5% on sales of \$6,500 3.) You purchase 9 1/2 yards of fabric at \$11.00 per yard. If there is a 7% salesb tax, what is the total cost of the fabric

36. ## math

6. Solve by factoring. m² + 8m + 7 = 0 (1 point)8, 7 –7, 1 *–7, –1 7, 1 7. Solve by factoring. n² + 2n – 24 = 0 (1 point)–12, 2 –2, 12 *–6, 4 –4, 6 Please Help

37. ## physics

an infinite ladder network of resistance is constructed with 1 ohm and 2 ohm resistances .calculate equivalent resistance between points a and b

38. ## Lang. Arts

4. Choose the sentence in which the comma helps make the meaning clear. A.If you call, them the dogs will come back. B.If you call them, the dogs will come back. C.If you call them the dogs, will come back. D.If you call them the dogs will come, back I

39. ## Physics Power

1.) How much energy does a 60 W light bulb consume in 1 hour? 2.) Beth pulled her brother (m=85 kg) in a 10 kg sled with a constant force of 95 N for 100 m. a) How much work did Beth do in moving her brother? b) How much power did she expend if it took her

40. ## poetry

In this unit, you read William Wordsworth’s poems “Lines Composed a Few Miles Above Tintern Abbey,” “The World is Too Much with Us,” and “I Wandered Lonely as a Cloud.” How are these poems representative of the Romantic Period?

41. ## parallelograms

what is the area of parallelogram lmno

42. ## geometry

A triangle has side lengths 24, 32, and 42. Is it a right triangle? Explain

43. ## fractions

Adam 3/12,1/6,1/3 Adam used the three fractions to make a circle graph and colored each a different color. What fraction of the graph is not colored?explain your answer.Can anyone help i need to explain to my 4 grader.

44. ## Algebra ASAP

Elimination ( show work please) 6x+5y=39 3x+5y=27

45. ## Physics

At a certain instant, a ball is thrown downward with a velocity of 8.0 m/s from a height of 40 m. At the same instant, another ball is thrown upward from ground level directly in line with the first ball with a velocity of 12 m/s. Find (a) the time when

4a^2+9b^2+25c^2-12ab+20ac-30bc divided by 2a-3b+5c.

47. ## Chemistry

In the reaction 2H2O2(aq)-->2H2O2 + O2 (g), There is intially 0.865 M H2O2. After 10.0 minutes, the molarity of H2O2 changes to 0.792 M. What is the rate of reaction in terms of H2O2?

48. ## Chemistry

Are the following electrolytes or non-electrolytes? 1) CH3CH2CH2OH 2) Mg(OH)2 3) H3CO4CH3

49. ## Physics

A competitor is aiming to complete a 1500m wheel-chair race in less than 4 min. After moving at a constant speed for exactly 3.5 min, there were still 240m to go. What must his acceleration be for the remaining distance if he were to finish the race on

50. ## Analytical Chemistry

What fraction of piperazine (perhydro-1,4-diazine) is in each of its three forms (H2A, HA–, A2–) at pH 7.05? Not sure how to find k1 and k2 needed for the fraction formulas...please help :(

51. ## chemistry

identify the reducing and the oxidizing agent for each reaction: a) 2na + br2 = 2nabr b) h2 + cl2 = 2hcl c) 2li + f2 = 2lif d) s + cl2 = scl2 e) n2 + 2o2 = 2no2 f) mg + cu(no3)2 = mg(no3)2 + cu

52. ## Science

Can you tell me the Main Idea(s)? There’s an old saying that oil and water don’t mix. But sometimes they do — especially when a chemical called a surfactant brings the two together. Once blended, oil and water become tough to pull apart. Unless, that

53. ## Math

A wheel has a 32 inch diameter. The speed of a point on its rim is 44 ft/sec. What is its angular speed?

54. ## law

looking for an article relating to civil law, The article can no be older than December 2010 and it has to relate to the contemporary law and justice. Any suggestions?

55. ## Chemistry

2Al(s)+3Cl2 = 2AlCl3 Limiting Reactant is Cl with 0.329mol. What is the maximum mass of aluminum chloride that can be formed when reacting 30.0g of aluminum with 35.0g of chlorine?

56. ## algebra

The lines x=4y−a and y=4x−b intersect at the point (1,2). What is a+b?

57. ## Math-geometry

A regular polygon with all sides that are congruent and all angles that are congruent. Thus, the regular triangles are equilateral triangles, and the regular quadrilaterals are squares. All equilateral triangles are similar to one another and all squares

58. ## World History- (Ms. Sue)

In what ways was racism common in both the North and the South?

59. ## science

what is the structural formula for a) 3,3,4-trimethyloctane B) 2-methyl-1-pentene

60. ## asap math

Divide 70 by 9 and write the answer as a mixed number

61. ## Chemistry

In a constant-pressure calorimeter, 60.0 mL of 0.320 M Ba(OH)2 was added to 60.0 mL of 0.640 M HCl. The reaction caused the temperature of the solution to rise from 23.24 °C to 27.60 °C. If the solution has the same density and specific heat as water,

62. ## pysics

A home run just clears a fence 105m from home plate. The fence is 4.00m higher than the height at which the batter struck the ball, and the ball left the bat at a 31.0 degree angle above the horizontal. At what speed did the ball leave the bat?

The minute hand on a watch is 7 mm long and the hour hand is 4 mm long. How fast is the distance between the tips of the hands changing at one o'clock? (Round your answer to one decimal place.)

64. ## Biology

When cells increase in size, the surface area to volume ratio decreases. But which surface area to volume ratio is better to the cell as well as to the organism? The larger or smaller ratio?

65. ## chm

Which of the following is a covalent compound composed of nonpolar covalent bonds? Answer >>H2 H2O CF4 CH4 NaF

66. ## Math-geometry

A regular polygon with all sides that are congruent and all angles that are congruent. Thus, the regular triangles are equilateral triangles, and the regular quadrilaterals are squares. All equilateral triangles are similar to one another and all squares

67. ## chemistry

why is HS- a stronger BL base compared to HSO4 In a series of oxybases with the same central atom, the base with more O atoms is stronger. In a series of oxybases with the same central atom, the base with less O atoms is stronger. Since H2SO4 is one of the

68. ## Physics

Train A starts at 4 miles South of a bridge and heads North at a constant speed of 30 miles per hour. Train B starts 6 miles North of the bridge. a. What velocity must Train B have so that the two trains cross the bridge at the same time? b. If Train B

69. ## math

f(x)=2x2−146x+c has 2 roots that are positive prime numbers. What is c?

70. ## geom

fill blanks give values of cin terms of pi if r=7m then d=?and c=?

71. ## chemistry

Calculate the theoretical yield (g) of precipitate formed when 10.0 mL of 0.50 M magnesium nitrate is added to 5.0 mL of 0.50 M potassium phosphate? [You must first write the balanced chemical equation.] Which reactant is present in excess?

72. ## math

how do you convert one half into a decimal?

73. ## math

Given P=RT/V, make T the subject of the formula

74. ## physics

motor A lift a steel bar 5000N upward at a constant 2m/s. motor B lift 4000N steel bar upward at a constant 3m/s. which motor is supplying more power?

75. ## Maths

A straight river flows at a speed of 20km/h. A boater starts at the south shore and heads in ths direction of 70degrees from the shore. The boat has a speed of 20km/h in still water. Find the true speed and direction of the boat.

76. ## differential equation urgent !

using method of undetermined coefficients d^2y/dx^2 -5 dy/dx+6y=xe^x

77. ## Spanish 1

Complete the sentences with the correct form of ir. todos Los Dias, yo ____ a la escuela

78. ## Finance

Your board of directors is thinking of taking out a loan of \$500,000 for the corporporation. You have to pay \$5,500 per month and \$50,000 after 10 years. What annual Rate of Return would you hve to achieve on investments to make this a profitable venture?

79. ## Physics

A small lead ball, attached to a 1.50-m rope, is being whirled in a circle that lies in the vertical plane. The ball is whirled at a constant rate of three revolutions per second and is released on the upward part of the circular motion when it is 0.75 m

80. ## Physics

One of the most powerful cranes in the world, operating in Switzerland, can slowly raise a load of 6000 tonne to a height of 12 m. (1 tonne = 1000 kg) The acceleration of gravity is 9.81 m/s2 . How much work is done by the crane? Answer in units of MJ I

we had to write a lead on this news, answering what's the what, whats news, and since its broadcasting we had to be it simple and conversational, as if we were reading it. story: The Bush Administration recently proposed eliminating 20 National Weather

82. ## Science ASAP

Can you tell me the Main Idea(s)? There’s an old saying that oil and water don’t mix. But sometimes they do — especially when a chemical called a surfactant brings the two together. Once blended, oil and water become tough to pull apart. Unless, that

83. ## Analytical Chemistry

You prepare a solution from 10.0 mL of 0.100 M MOPS buffer (3-morpholinopropane-1-sulfonic acid) and 10.0 mL of 0.086 M NaOH. Next, you add 1.00 mL of 8.87 × 10-4 M lidocaine to this mixture Denoting lidocaine as L, calculate the fraction of lidocaine

84. ## Physics

The radius of the earth is 6.37*10^6 m and its mass is 5.975*10^24 kg. Find the earth's average density to appropriate significant figure.

85. ## Physics

The radius of the earth is 6.37*10^6 m and its mass is 5.975*10^24 kg. Find the earth's average density to appropriate significant figure.

86. ## Algebra

The owner of the studio replaced the tiles last year. The tiles cost \$15 for a set of 8 and \$2 for each additional tile. What is the monthly increase the owner charged each of her 34 students over a 6-month period to cover the cost of replacing the tiles?

87. ## help college algebra

given the following piecewise function f(x) = -x+1 for x

88. ## Math

A horse on a merry-go-round is 20 ft from the center and travels at 10 mph. What is its angular speed?

89. ## Physics

Name the fundamental forces of nature.

90. ## math help

Find the lateral area of a cone with a radius of 7 ft. and a slant height of 13 ft. Use 3.14 for ð and round to the nearest tenth

91. ## World History- (Ms. Sue)

What were the two ways that the North and the South differed by the mid-1800's? My answer: The North had a rapidly growing economy with a large and rapidly growing urban population and no slavery north of the border states. The South was dominated by a

92. ## Chemistry

A block of aluminum with a volume of 98.5 cm3 absorbs 67.4 J of heat. If its initial temperature was 32.5 °C, what is its final temperature? (density of aluminum = 2.70 g/cm3) I do not understand how to get the answer

93. ## Vocabulary

I need help with writing sentences using my vocabularywords

94. ## maths

integrate sqrt2/1-3x

95. ## elecTRICITY

A 9V battery has an electric potential difference of 9V between the positive and negative terminals. How much kinetic energy in J would an electron gain if it moved from the negative terminal to the positive one?

96. ## Psychology - Social Problems

Please check my answers. 1. When considering marital separation and divorce as a social problem, an effective approach might be to: __x_a. develop counseling options for couples in crisis. ____b. focus on problems with the institution of marriage itself.

97. ## phYSICS!!!

Recently, Asteroid 2012 DA14 came within 34,200 km from the center of the earth at its point of closest approach. If the moon goes around the earth once every 27.5 days, what is the ratio of the distance of closest approach of DA14 to the radius of the

98. ## Algebra

The floor of the studio is covered with 615 square tiles that measure 2 feet by 2 feet. The owner of the studio replaced the tiles last year. The tiles cost \$15 for a set of 8 and \$2 for each additional tile. What is the monthly increase the owner charged

99. ## geometry

prove that The sum of the angles in any triangle is 180 degrees is true in Euclidian geometry.

100. ## math

the 2 consecutive multiples of 6 up to 116

101. ## Chemistry

What is the maximum mass of aluminum chloride that can be formed when reacting 30.0g of aluminum with 35.0g of chlorine

102. ## geoMETRY!

ABC is an acute angle triangle with points D and E on BC and AC, respectively such that BE and AD are altitudes. AD and BE intersect at H. If ∠BCA=39∘ and ∠EBA=2∠DAB, what is the measure of ∠ABC (in degrees)?

103. ## economic and management science

discuss the development of money

Please help. Thank You. 1. The stem-changers in the current section are similar to those in the previous section except these stem-change "o" to "oe." *A.) true B.) false 2. Of the following, which is not a stem-changing verb? A.) almorzar *B.) comer C.)

105. ## algebra

How many pairs of integers (not necessarily positive) are there such that both a2+6b2 and b2+6a2 are both squares?

106. ## algebra!

The lines x=4y−a and y=4x−b intersect at the point (1,2). What is a+b?

107. ## Chemistry

Identify the true statement about Lewis structures. Select all the correct answers. 1. Hydrogen is usually surrounded by 4 electrons in a valid Lewis structure. 2. A single bond in a Lewis structure represents 2 electrons. 3. A double bond in a Lewis

108. ## physics

IF A 0.5 Kg baseball(at rest) is hit by a bat with a force of 200.0 N what is the magnitude of the baseball just as it is leaving the bat?

109. ## Math

The perimeter of a quilt had to be 34 feet because he only had that much binding. If he wanted it to be 8ft long what would its area be?

110. ## algebra!

The number 1003003001 is the product of N (not necessarily distinct) primes. What is the value of N?

111. ## LAW

looking for an article relating to civil law, The article can no be older than December 2010 and it has to relate to the contemporary law and justice. Any suggestions?

112. ## world history

What is the answers to study guide chapter 12 part 3?

113. ## Chemistry

A block of aluminum with a volume of 98.5 cm3 absorbs 67.4 J of heat. If its initial temperature was 32.5 °C, what is its final temperature? (density of aluminum = 2.70 g/cm3) I do not understand how to get the answer

114. ## o.chem

how would doubling the concentration of the nucleophile affect the rate of an sn2 reaction?

115. ## chemistry

what is the structure of H2P2O6?

116. ## science

Expain why deepa sea fishes are not crushed by the pressure of all of the water above them. I think maybe its because their density or mass is higher? Am I right?

117. ## Math

The wheels of a bicycle have a 24 inch diameter. When the bike is being ridden so that the wheels make 12 rpm, how far will the bike travel in one minute?

118. ## Math

Triangle ABC is an isosceles triangle If the measure of B is 37 degrees what is the measure of C? A.37 B.53 C.106 D.143 I think it's A or C?

119. ## math

The blackberry cobbler recipe makes 8 equal servings. Nina, Jack, and Cameron each ate 1/4 of the servings. How many servings of cobbler were left over?

120. ## Physics

A current of 4.6 A is measured through a 7.8 ohms resistor for 1.75 minutes. How much heat is generated by the resistor?

121. ## Engineering Economy

What is the future worth of \$1,000 in month 1, \$1,040 in month 2, and amounts increasing by \$40 per month through month 12, at the end of year 2 if the interest rate is 23.7631528% per year, compounded continuously?

122. ## Math

Susan was awake for 2/3 of an entire day. If she spent 3/7 of her time awake at work, what fraction of the day was she at work?

we had to write story in correct broadcast form in correct broadcast form, and include the soundbite. Based on this false information information: Kalamazoo, Michigan, is experiencing a severe snowfall which began yesterday. Past record snowfalls in

124. ## Physics

A current of 4.6 A is measured through a 7.8 ohms resistor for 1.75 minutes. How much heat is generated by the resistor?

125. ## Math

Cathy made 25 cupcakes for the friends at her party. If only 4/5 of her friends showed up, how many cupcakes does she have left?

126. ## math

1/8 inch= 5 mile, then 1 inch = how many miles

127. ## Age Probs

Lisa is 16 years younger than Andy. In 6 year, the sum of their ages id 42. How old is Lisa now?

128. ## Algebra

The floor of a dance studio is covered with 615 tiles. The owner of the studio replaced the tiles last year. The tiles cost \$15 for a set of 8 and \$2 for each additional tile. What is the monthly increase the owner charged each of her 34 students over a

129. ## math

what is 4x+2=26,then 4x8=

130. ## Calc

find the derivative of y =(x+3)^3 / sqrt(x^2 -1) using logarithmic differentation.

131. ## English 8R - HELP!

How did Active Reading lend itself to the ELA Short Response Questions?

132. ## Algebra

The floor of a dance studio is covered with 435 tiles. The owner of the studio replaced the tiles last year. The tiles cost \$15 for a set of 8 and \$2 for each additional tile. What is the monthly increase the owner charged each of her 34 students over a

1)How has battered-woman syndrome been used in criminal court cases in recent years? 2)Compare the Lavallee and Malott cases. How are they similar and how are they different? 3)Why do you think many abused woman drop the charges against their abusive

A ball is dropped from a height of 5.67 m. If the ball rebounds with a speed of 4.22 m/s, what is the coefficient of restitution? a. .40 b. .74 c. .56 d. 1.23 I've ruled d out because it is greater than 1.

135. ## science

Expain why deep sea fishes are not crushed by the pressure of all of the water above them. I think maybe its because their density or mass is higher? Am I right?

136. ## chemistry

Commodity prices of NaCl and urea are about \$0.033/lb for NaCl (as rock salt) and about \$0.10/lb for urea. Calculate the cost of treating 1000 lb of ice on a surface to produce a solution that melts at -3.9 degrees Celsius with each chemical. I know you

137. ## math

Maisie is writing a report about kangaroos. The report must be two full pages. If there are twenty lines on each page and each line has about 20 words, about how many words long does Maisieʼs report need to be?

138. ## MATH

HOW DO YOU CALCULATE THIS? 5:05 PM SUBTRACT 1.9 HOURS?

139. ## History

Why did the Second Great Awakening lead to reform movements?

140. ## Physics

A horse on a merry-go-round is 20 ft from the center and travels at 10 mph. What is its angular speed?

141. ## Chemistry

what is the freezing point of 16.7g of LiCl in 136g of water, assuming complete dissociation for water kf= -1.86/mol

142. ## Chemistry

what is the freezing point of 16.7g of LiCl in 136g of water, assuming complete dissociation for water kf= -1.86/mol

143. ## algebra

The cost equation for screeners (t-shirt shop)was y=50+7x and the cost equation for teasers (t-shirt shop) was y=78+5x write one equation that will tell you the number of t-shirts when the cost is the same

144. ## Chemistry

what is the freezing point of 16.7g of LiCl in 136g of water, assuming complete dissociation for water kf= -1.86/mol

145. ## Chemistry

what is the freezing point of 16.7g of LiCl in 136g of water, assuming complete dissociation for water kf= -1.86/mol

146. ## English

1. The defenders of the Alamo put up such a (burly dogged) resistance that the enemy had a hard time capturing it dogged 2.To avoid a lot of unwanted attention the famous rock star registered in the hotel under a(n) (rummage alias) alias 3.An art historian

147. ## Physics

I'm trying to rank the maximum temperatures of water at 20 degrees Celsius after adding in heated copper cylinders. The first case is 1 cylinder at 22.5 degrees Celsius. Second is two cylinders at 25 degrees Celsius. Third is 3 cylinders at 25 degrees

148. ## math

what should you do if at first you don't succeed? its a riddle and the letters are y,t,o,r,h,p,s

149. ## math

write the simplest form 2.30

150. ## physical

what are the limitations on practical interstellar travel for both manned and unmanned craft and what are some proposed ways to deal with them in the future?

151. ## Math

if a person deposits \$304 per year for 13 years and makes \$4275, how much interest did he make per year?

152. ## math.chapter 8.

what does do not replace it mean

153. ## Eng1511

Summarize the sequence of events leading to the write's proposal to mimmy.highlight the details of the couple's journey to finding love

154. ## language arts

I want a compostion on the moon

155. ## calculus

what is the limit of (9x/(9x+5))^(6x) as x approaches infinity?

156. ## English

Word box: alias amble burly distort dogged dumbfounded extinct fossil grit inevitable ingrained meteoric parody prevail rend replenish rummage skimp sleuth vandalism 2.We were nothing less than ____ when we saw the immense damage that the hurricane had

157. ## calculus

evaluate the following limit... ((1-x)/((1/e)-(e^-x))) as x approaches one

158. ## English

Whats the nouns and verbs in this sentences ? Seek his will in all you do and he will direct your paths

159. ## calculus

Find the value for W when the limit as x approaches 8 of ((2x^2)-7x + W)/(x-8) = 25

160. ## hurry past bedtime

As a mixed number what is 70÷9

161. ## Math

The owner of a luxury motor yacht that sails among the 4000 Greek islands charges \$430 per person per day if exactly 20 people sign up for the cruise. However, if more than 20 people (up to the maximum capacity of 90) sign up for the cruise, then each fare

162. ## physics

You are in the lab with a 10 V battery. You have a 10 W light bulb and you want to put 1/2 A of current through the light bulb and 5 V across the light bulb. This will allow the light bulb to have a brightness proportional to 2.5 W. Assuming any resistors

163. ## Algebra 2

a.) the number of terms b.) the first term c.) the last term d.) evaluate the sum 5 E (3+n) n=1 8 E 2n/3 n=1 I don't know what the symbol is for the equation but it looks like an "E"

164. ## mat/116

What would be the value of expressing something like the national debt in scientific notation? What information would be lost in such a usage? Is that important? Explain why or why not

165. ## algebra

If you bought 24 cards for \$50, one card is \$1 each and he other card is \$5. Write an equation and solve.

166. ## math

why does lxw=a work

167. ## Calculus Help

Evaluate the indefinite integral. ∫4dx/(xln(x))

168. ## Math

Pls help me find the volume of rectangular prism: Width 23cm Height 8cm Length 14.2

169. ## College physics

According to test performed by the manufactures, an automobile with an initial speed of 75 km/h has a stopping distance of 25 m on a level road. assuming that no skidding occurs during breaking, what is the value of μ , between the wheels and the road

170. ## math

A bakery can sell muffins for \$1 each. If it costs the bakery \$5 to make 20 muffins, what percent of the money?

171. ## math

Lane French had a bad credit rating and went to a local cash center. He took out a \$100 loan payable in two weeks at \$115 (In other words, in two weeks he paid back a total of \$115). What is the percent of interest paid on the loan? Do not round

172. ## pre-calculus

the foci of an ellipse are (0,2) (0,-2) and the eccentricity is 1/2. determine the equation of the ellipse. write your answer in standard form.

173. ## English

16.Isnt it foolish to think that just because of his (meteoric burly) physique he has no interest in art or music? burly 17.We scorn all those who would deliberately bend the truth and (distort amble) history in order to suit the political needs of their

174. ## Chemistry

calculate the energy in joules lost when 70.0 grams of water cools from 86.4 celsius to 7.1 celsius

175. ## English

Word box: alias amble burly distort dogged dumbfounded extinct fossil grit inevitable ingrained meteoric parody prevail rend replenish rummage skimp sleuth vandalism 1.There is an old saying that nothing is really ____ except death and taxes inevitable

176. ## fractions

Adam used the three fractions to make a circle graph and colored each a different color. What fraction of the graph is not colored?explain your answer.Can anyone help i need to explain to my 4 grader.

177. ## English

Which word has the same beginning sound as special? sunny swept sprout speed speed

178. ## Statistics

A simple random sample of 120 SAT scores ahs a mean of 1540. Assume that SAT scores have a population standard deviation of 333. a) Construct a 95% conf. interval estimate of the mean SAT score. b) Is a 99% conf. interval estimate of the mean SAT score

179. ## college physics

You are in the lab with a 10 V battery. You have a 10 W light bulb and you want to put 0.75 A of current through the light bulb and 7.5 V across the light bulb. This will allow the light bulb to have a brightness proportional to 5.625 W. Assuming any

180. ## AP Calculus BC

A curtate cycloid is defined by the equations x = 2t - sin t and y = t - cos t. If I walk along the cycloid, how far will I walk in 10 seconds?

181. ## math

Write an explicit formula for the sequence one-half, three-sevenths, one-third, five-nineteenths, three-fourteenths, ... Then find a14. (1 point) an = an – 1 – n minus one over seven n; fifteeen over one hundred nintey nine an = a sub n plus one over n

182. ## government

. The source of the Supreme Court’s authority is (Points : 1) moral suasion. judicial activism. concurring opinion. dissent.

183. ## English

Help! I need help unscrambling these letters into two words it is due tommorow! The letters are tttrrlnemisianaaon it is the name of a mall, remember its a two letter word

184. ## science

what are human factors that causes illhealth,accidents and disasters

185. ## math

jason made 42 bottles of orange juice drink to give to his class. How many pints of juice drink did jason make if each bottle holds 8 fl oz

186. ## MATH

PLEASE EXPLAIN. I DO NOT GET IT!!!!!!!!!HOW DO YOU CALCULATE THIS? 5:05 PM SUBTRACT 1.9 HOURS?

187. ## pROBABILITY AND STATISTIC..HELP...................

a missile protection system consists of n radar sets operating independently each with probability .9 of defecting an aircraft entering a specified zone.all radar sets cover the same zone.if an airplane enters the same, find the probability that it will be

1.Graph the polar equation r=3-2sin(theta) 2. Find the polar coordinates of 6 radical 3,6 for r > 0. 3. Find the rectangular coordinates of (7, 30°). 4. Write the rectangular equation in polar form. (x – 4)2 + y2 = 16 5. Write the equation –2x + 6y =

189. ## English

Word box: alias amble burly distort dogged dumbfounded extinct fossil grit inevitable ingrained meteoric parody prevail rend replenish rummage skimp sleuth vandalism 3.As the buffalo began to decrease sharply in numbers conservationists feared that it

1.Graph the polar equation r=3-2sin(theta) 2. Find the polar coordinates of 6 radical 3,6 for r > 0. 3. Find the rectangular coordinates of (7, 30°). 4. Write the rectangular equation in polar form. (x – 4)2 + y2 = 16 5. Write the equation –2x + 6y =

191. ## math

Given the equation 2x + 8y = 6, answer the following questions: If x decreases by 2 units, what is the corresponding change in y? ??

1.Graph the polar equation r=3-2sin(theta) 2. Find the polar coordinates of 6 radical 3,6 for r > 0. 3. Find the rectangular coordinates of (7, 30°). 4. Write the rectangular equation in polar form. (x – 4)2 + y2 = 16 5. Write the equation –2x + 6y =

193. ## Latin

Check my translations please! 1. Aeneas was ordering the men to run. Aeneas viros currere iubebat. 2. The pretty queen persuades the Trojan to stay. Regina pulchra Troianum manēre persuadet. 3. A tyrant is not able to give freedom to the people. Tyranni

194. ## math

The owner of a luxury motor yacht that sails among the 4000 Greek islands charges \$430 per person per day if exactly 20 people sign up for the cruise. However, if more than 20 people (up to the maximum capacity of 90) sign up for the cruise, then each fare

195. ## biology

what characteristics appear to show consistent development over the 4 million years of hominid evolution?

196. ## math

Driver A had been leading archrival B for a while by a steady 3 miles. Only 2 miles from the finish, driver A ran out of gas and decelerated thereafter at a propertional to the square of his remaining speed. One mile later, driver A's speed was exactly

197. ## math

use Method of variation of parameter y''+y = tan^2 t

198. ## chemistry

How much heat in joules is required to heat a 44g sample of aluminum from 76 F to 148 F?

199. ## math

by using method of undetermined coefficients d^2y/dx^2 -5 dy/dx+6y=xe^x

200. ## maths-Circles

There are two equal chords AB and and CD of a circle whose centre is O , when produced meet at point E. prove that EB=ED and EA=EC

201. ## Physics

A train is moving towards a destroyed bridge. The velocity of the train remains constant at 20 m/s. A person inside the train realizes that they will die unless they run to the back of the train and jump out. If the person is 15 m from the back of the

202. ## MONGU COLLEGE

1.Determine the sum of infinity of the series 4,2,1

203. ## math

The relationship between the temperature in degrees Fahrenheit (°F) and the temperature in degrees Celsius (°C) is F=(9/5)C+32 (b) What is the slope of the line? ?? What does it represent? (a) It doesn't represent anything. (b)It represents the constant

204. ## math

A bakery can sell muffins for \$1 each. If it costs the bakery \$5 to make 20 muffins, what percent of the money made from muffins sales is profit

205. ## World History- (Ms. Sue)

What are the effects of California's application for statehood?

206. ## math

A community is considering increasing the sales tax rate 0.5% to fund a new sports arena. If the tax rate is raised, how much more will you pay in sales tax on \$500?

Please help. Thank You. 1. The stem-changers in the current section are similar to those in the previous section except these stem-change "o" to "oe." A.) true B.) false 2. Of the following, which is not a stem-changing verb? A.) almorzar B.) comer C.)

208. ## MONGU COLLEGE

find the line perpendicular and passes through (0,0) 5x-2y =10

209. ## math

Julie has been offered two jobs. The first pays \$400 per week. The second job pays \$175 per week plus 15% commission on her sales. How much will she have to sell in order for the second job to pay as much as the first?

solve: 2x^2-3x+5 divided by 2x-1

211. ## Electromagnetic spectrum

Some astronomical objects emit no visible light but are known through (blank?) and radio images; satellite observations (blank?) Earth's atmosphere help scientists study space at wavelengths that do not reach Earth's surface?

212. ## Humanities

the 15 point important events and impact of the renaissance timeline, in details pls

213. ## math

f(x)=2x^2−146x+c has 2 roots that are positive prime numbers. What is c?

214. ## math

the second angle of a triangle is twice the first angle. The third angle is five more than four times the first angle.Find the measure of the second angle.

215. ## geometry

A radio tower casts a shadow 170 feet long. The angle of elevation of the sun is 43 degrees. How high is the tower? Round to hundredths.

216. ## Analytical Chemistry

Show the predominant form of the amino acid tyrosine at pH=13.9 and ph=7.8. Be sure to include the proper number of hydrogens on heteroatoms and the correct formal charges on atoms. I calculated the pka values for COOH (pka=2.41) NH3 (pka=8.67), and OH

217. ## Physics

A pitcher throws a baseball with a horizontal velocity of 132 ft/s (90 mph) toward home plate that is approximately 60 ft. away. What is the vertical drop of the ball when it reaches the plate? g = 32 ft/s^2.

218. ## math

f(x)=2x2−146x+c has 2 roots that are positive prime numbers. What is c?

219. ## physical

A small dog is trained to jump straight up a distance of 1.2 m. How much kinetic energy does the 7.2-kg dog need to jump this high? (The acceleration due to gravity is 9.8 m/s².)

220. ## Math

A tree is 15 ft tall. It casts a shadow 20 ft long. an 8 ft elephant approaches. how long will the elephant's shadow be?

221. ## math

The stopping distance D of a car after the brakes have been applied varies directly as the square of the speed s. A certain car traveling at 70 mi/h can stop in 343 ft. What is the maximum speed it can be traveling if it needs to stop in 160 ft?

222. ## math

Donna is 12 years younger than her brother. in 2 years she will be 14 years more than as half as her brother .how old is each now

223. ## communication skills

what does the letters RX mean in communication skills.

227. ## math

Given P=RT/V,make T tgd subject of the formula.

228. ## maths

What is the total capacitance of capacitors connected in series, C1=25F, C2=125F ? Round result to whole number.

229. ## math

john hunt has invested \$500.00 in a savings account that pays 6% annual interest, compounded quarterly. After the second quarter of interest has been credited, what is the amount in the account?

230. ## Pre calculus, vectors

A straight river flows at a speed of 20km/h. A boater starts at the south shore and heads in ths direction of 70degrees from the shore. The boat has a speed of 20km/h in still water. Find the true speed and direction of the boat.

231. ## Algebra

Exponents: Simplify the expression 7ab^-2 / 3w I got 7a3w / b^2 Is this correct?

232. ## math

what is 7 over 24 converted into simplest form?

n/4 +32=32 I can get it n/4=40 but not sure how to get n by itself????

234. ## Math

Find the product write answer in scientific notation (3 x 10^6) * (2 x 10^12) I got. .6 x 10^ 9

235. ## Chemistry

How many moles of magnesium sulfate are needed to make in a solution of 0.10g Mg2SO4?

236. ## geometry

what is the perimeter of a pool 7ft wide 10ft long 4ft high? Is it 34ft squared?

n/4+32=72

238. ## Math HELP PLEASE! QUICK!

1.Write the rectangular equation in polar form. (x – 4)2 + y2 = 16 2.Write the equation –2x + 6y = 7 in polar form. 3.Graph the polar equation 2 = r cos(theta – 20°). 4. Write the polar equation in rectangular form. r = –12 cos

239. ## Chemistry

Would you expect the pressure of a 12.5 mL syringe of natural gas to be the same as the pressure of 12.5 mL of air? In other words, is Boyle's Law dependent on the type of gas that is being measured?

240. ## Pre-calculus HELP PLASE !

1.Write the rectangular equation in polar form. (x – 4)2 + y2 = 16 2.Write the equation –2x + 6y = 7 in polar form. 3.Graph the polar equation 2 = r cos(theta – 20°). 4. Write the polar equation in rectangular form. r = –12 cos

241. ## math

Find the solution x of the following equation : 12X =32.

242. ## Life orantation

What,according to the Basic Conditions of employment applies with regard to the contraventions?

243. ## Chemistry

Phosphoric acid, H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH, and the concentrations of all species in a 0.100 M phosphoric acid solution. pKa1 = 2.16 pKa2 = 7.21 pKa3 = 12.32 [H3PO4] = ?

244. ## Algebra

-3(x - 2) -1 > 2 - 5(x -6)

245. ## Humanities

the 15 point important events and impact of the renaissance timeline, in details pls

246. ## Spanish

Please help. Thank You. 1. The stem-changers in the current section are similar to those in the previous section except these stem-change "o" to "oe." A.) true B.) false 2. Of the following, which is not a stem-changing verb? A.) almorzar B.) comer C.)

247. ## Algebra

Jim is 45 years old. He is 10 years older than 5 times his niece Carol. How old is Carol

248. ## Math

Wirte an exponential growth model. 22. A business had a \$20,000 profit in 1990. Then the profit increased by 20% per year for the next 10 years. y=c(1+r)^t y=20,000(1+0.2)^10 Is that correct?

249. ## Chemistry

How many moles of NaOH are in 13.2 mL of 3.00 M NaOH?

250. ## Differential Equations

Driver A had been leading archrival B for a while by a steady 3 miles. Only 2 miles from the finish, driver A ran out of gas and decelerated thereafter at a proportional to the square of his remaining speed. One mile later, driver A's speed was exactly

251. ## Chemistry

Using the balanced equation of: HCl+NaOH-->H20+NaCl, how many moles of HCl could be neutralized with 13.2 mL of 3.00 M NaOH?

252. ## Alg. I

(-5d^-5) (6d^2) -30d^-3 I know that d^-3 goes on the bottom to make it positive;however,does -30 go on the bottom as well? Please explain the rule(s) for this. Thanks

253. ## world geography

How has the United States economy impacted its relationship/s with other countries

254. ## math

If you invest \$2500 for one year, part at 8% and part at 12%.....how much was invested at each percentage rate if they both earned the same amount of interest?

255. ## Life orantation

What,according to the Basic Conditions of employment applies with regard to the contraventions?

1. When considering marital separation and divorce as a social problem, an effective approach might be to: __x_a. develop counseling options for couples in crisis. ____b. focus on problems with the institution of marriage itself. ____c. develop

257. ## calculus

Use logarithmic differentiation: F(x)= (3x+6)^4 (x^3 -2)^5 f'(x)=

259. ## Math

What has a product of 320 and a sum of -36?

261. ## Math

Given the points A(0,0)B(3,1), and C(1,4), what is the measure of angle ABC?

262. ## physics

A 200 gram ball gets dropped from a roof at 15 meters high. A boy on the ground catches it. If 10 percent is translated to internal energy, then what was the increase of internal energy? Is it safe to be playing ball from the roof top?

263. ## science

50 ml of water in a beaker will exert what pressure on the beaker than 50ml of water in a 350ml beaker

264. ## physics

the moment of inertia of a thin uniform rod of mass M and length L about an axis passing through a point midway between the centre and one end perpendicular to its length is -----------------------------------

265. ## Physics

High-speed stroboscopic photographs show that the head of a 197 g golf club is traveling at 36.8 m/s just before it strikes a 45.9 g golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 25.9 m/s. Find the speed

266. ## physics

If a boat is being tugged by 2 tug boats 20000 newtons north, the river is flowing at 5000 newtons south what direction is the boat and what's the velocity?

267. ## Math

Mark has received a tax refund. He used 1/4 of the money to pay off his credit card. Than he spent 1/3 of the remaining money on new clothes and shoes for his kids. After shopping he used 1/5 of what was left to go out to eat. Finally, donated 1/2 of what

268. ## Physics

In the sport of skeleton a participant jumps onto a sled (known as a skeleton) and proceeds to slide down an icy track, belly down and head first. In the 2010 Winter Olympics, the track had sixteen turns and dropped 126 m in elevation from top to bottom.

269. ## math

As a a test of a new measurement process, 10 measurements are made on pieces of glass known to have conductivity 1. The average of the 10 measurements is 1.07. Indicate whether 1 and 1.07 is a parameter or statistic and explain why. I understand that 1.07

270. ## Physics

High-speed stroboscopic photographs show that the head of a 197 g golf club is traveling at 36.8 m/s just before it strikes a 45.9 g golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 25.9 m/s. Find the speed

271. ## Math

1)A bakery can sell muffins for \$1 each. If it costs the bakery \$5 to make 20 muffins, what percent of the money made from muffins sales is profit? 2) A community is considering increasing the sales tax rate 0.5% to fund a new sports arena. If the tax rate

272. ## Life orientation

Ways in which pollution(water,air,land)impact the community,provide relevent sources to support your claims

273. ## Comm/330

what are other kinds of secondary groups.

Please help. Thank You. 1. The stem-changers in the current section are similar to those in the previous section except these stem-change "o" to "oe." A.) true B.) false 2. Of the following, which is not a stem-changing verb? A.) almorzar B.) comer C.)

275. ## chemistry

I need to find the radius of a cylinder with only the following info: Cylinder height=125um There is 1 C atom/0.01848 nm^2 There are 5.75x10^10 C atoms on the surface of cylinder Use quadratic formula to solve

276. ## Algebra

f(x) is a polynomial such that f(1) = 8 and f(3) = 16. r(x) is the remainder when f(x) is divided by (x-1)(x-3). What is r(5)?

277. ## science

Why do manufacturing industries have more problems controlling pollution then other kinds of businesses have?

278. ## physic

Martha drops a 1 kg rock off the top of Black Oak Canyon which is 100m deep. What is the KE of the rock the instant before it hits bottom? Hint: Conservation of energy states that PE = KE

asked by POTENTIAL & KINETIC ENERGY PRACTICE
279. ## Creative writing

I want to write a story that is told ONLy through one person's mind; what this one person is thinking and saying, with no other characters speaking. How would you go about formatting it?

280. ## Science 8R - HELP!

what is the difference between weathering and erosion???

281. ## Linear Algebra

Prove that If a vector space is of dimension n and a set of vectors spans V, then that set of vectors must be linearly independent.

282. ## FINANCE

What will \$10,000,000 be in 12 years if it earns 7% and you add \$5,000 at the beginning of every month?

283. ## differential equation urgent !

using Method of variation of parameter y''+y = tan^2 t

284. ## Math

Find product and write answer in scientific notation (3 x 10^6). * (2 * 10^12) I got .6 x 10 ^19 Is this right?

285. ## differential equation urgent !

Driver A had been leading archrival B for a while by a steady 3 miles. Only 2 miles from the finish, driver A ran out of gas and decelerated thereafter at a propertional to the square of his remaining speed. One mile later, driver A's speed was exactly

286. ## american lit

the representation of the harshness of the praire on my antonia novel i have to write a three paragraph essay thanks

one 10 is regrouped as 10 ones in each number. work backwards. write the number with 10 ones grouped as 1 ten again. 1.tens ones 5 15

288. ## science

What is the highest and lowest temperature in the exosphere? or just the highest temperature.

289. ## Science

what are some health risks of copper to humans? what are the environmental riks of copper? what are the benefits of copper to the industry, economy, and society? what are all the organisms that are affected by copper? what is meant by the term

you have 3 dimes. you need a quarter to use a public telephone. what can you do?

291. ## Physics

A 64.7 kg astronaut is on a space walk away from the shuttle when her tether line breaks. She is able to throw her 14.1 kg oxygen tank away from the shuttle with a speed of 7.45m/s to propel herself back to the shuttle. Assuming that she starts from rest

292. ## physics

What is the KE of a 9 kg mass at 2 m/s?

asked by POTENTIAL & KINETIC ENERGY PRACTICE
293. ## college chemistry

during a liquid-liquid extraction the procedure often calls for the use of saturated NaCl when ether is used as the extraction solvent, but not when dichloromethane is used. why?

294. ## social studies

what is the nerve center of the american presidency?

295. ## College Algebra

Provide one example to show how you can use the Expected Value computation to assess the fairness of a situation (probability experiment). Provide the detailed steps and calculations.

296. ## Physics

An 67.6 kg object moving to the right at 38.7 cm/s overtakes and collides elastically with a second 48.9 kg object moving in the same direction at 19.2 cm/s. Find the velocity of the second object after the collision. Answer in units of cm/s

297. ## math

what is the probability of drawing 5 queens from a standard deck of cards?

298. ## Physics

A person pushes a 23.5-kg shopping cart at a constant velocity for a distance of 30.3 m on a flat horizontal surface. She pushes in a direction 31.5 ° below the horizontal. A 37.3-N frictional force opposes the motion of the cart. (a) What is the

What is the highest temperature in the exosphere.

300. ## Physics

The concepts in this problem are similar to those in Multiple-Concept Example 4, except that the force doing the work in this problem is the tension in the cable. A rescue helicopter lifts a 72.4-kg person straight up by means of a cable. The person has an

301. ## College Algebra

Develop a tree diagram for tossing two, eight-sided gaming dice to figure out how many possibilities there are. Discuss the purpose of using such a visual in working out probability.

302. ## Chemistry

What volume of 1.60 M SrCL2 is needed to prepare 525 ml of 5.00mM SrCl2?

303. ## spainsh 2 help please

can someone check my answers please? 1. Si yo Tuviera Hambre, Me volvería a comer (comer.) 2. Si el bebe Tuviera sueño, eL estaría en bed (dormir.) 3. ¿Que te necesito to (gustar) pedir? 4. Me loved (gustar) las pechugas de pollo. 5. Si yo fuera Tom

304. ## Physics

A bicyclist rides 2.78 km due east, while the resistive force from the air has a magnitude of 6.52 N and points due west. The rider then turns around and rides 2.78 km due west, back to her starting point. The resistive force from the air on the return

305. ## Multivariable Calculus

Find the linearization L(x,y)of the function f(x,y) at P_0. Then find an upper bound for the magnitude |E| of the error in the approximation f(x,y)=L(x,y) over the rectangle R. f(x,y) = (1/2)x^2 + xy + (1/4)y^2 + 3x - 3y + 4 at P_0(2,2),R:|x-2|

306. ## math 116

What would be the value of expressing something like the national debt in scientific notation? What information would be lost in such a usage? Is that important? Explain why or why not

308. ## Physics

The drawing shows a skateboarder moving at 5.40 m/s along a horizontal section of a track that is slanted upward by 48.9 ° above the horizontal at its end, which is 0.582 m above the ground. When she leaves the track, she follows the characteristic path

309. ## science

Name one similarity and one difference between pitch and loudness.

310. ## Physics

A student, starting from rest, slides down a water slide. On the way down, a kinetic frictional force (a nonconservative force) acts on her. The student has a mass of 78 kg, and the height of the water slide is 12.5 m. If the kinetic frictional force does

311. ## Physics

In attempting to pass the puck to a teammate, a hockey player gives it an initial speed of 2.95 m/s. However, this speed is inadequate to compensate for the kinetic friction between the puck and the ice. As a result, the puck travels only one-half the

312. ## Physics

A ball is dropped from a height of 5.67 m. If the ball rebounds with a speed of 4.22 m/s, what is the coefficient of restitution? a. .40 b. .74 c. .56 d. 1.23 I've ruled d out because it is greater than 1.

313. ## math

a field trip will cost 7 dollars per student. write an expression to find the cost of the field trip for s students. what is the total cost if 26 students go on the trip?

314. ## Physics

Multiple-Concept Example 13 presents useful background for this problem. The cheetah is one of the fastest accelerating animals, for it can go from rest to 34.7 m/s in 3.03 s. If its mass is 102 kg, determine the average power developed by the cheetah

315. ## Chemistry

Consider the titration of 25.0mL of 0.10M HAc with 0.10M NaOH. That is, NaOH is added to HAc. (a)pH at the beginning of titration. (b)pH at the equivalence point of the titration. (c) pH at the midpoint of the titration.

316. ## Spanish 2 help please

Can someone check my answers? Provide the correct word (quién, quien, qué, que, como, cómo, cuánto, cuanto, cuántos, cuantos, cuando, dónde, donde) to fill in the blank for the following sentences: 1. Susana es de España __cuando____ está en

317. ## statistics

Suppose a random sample of 80 measurements is selected from a population with a mean of 65 and a variance of 300. Select the pair that is the mean and standard error of x.

318. ## Calculus

For what values of x does the graph of F9x) = 2x^3 - 3x^2 + 12x + 87 have a horizontal tangent?

319. ## Science

i need to unscramble a phrase about Plate Tectonics with these letters: rorpsfgnlsadeeasi

320. ## Math

Mrs. Smith wanted to stimate the length of her porch so she would know how much paint to buy. Which would be the best benchmark for her to use? A. her fingertip B. a license plate C. a baseball bat D. how far she could walk in 20 minutes

321. ## science

find the theoreticval value of the period of a pendulum of length 0.9 meters located on the surface of the earth.

322. ## Math

Anna wanted to measure the capacity of a large bucket. What unit of measure should she use? A. cups B. pounds C. inches D. gallons

323. ## Literature

Hi where can I find a free on line thing to check my writing ?

324. ## math

find the perimeter for 11in + 9 1/2in + 7in + 9 1/2in

325. ## Algebra

Power Standard Form 10^1 10 10^2 100 10^3 1000 10^4 10000 10^5 100000 Explain how the number of zeros in the standard form of a power of 10 relates to the exponent. Write a rule for the number pattern as well.

326. ## trig

Four wires support a 40-meter radio tower. Two wires are attached to the top and two wires are attached to the center of the tower. The wires are anchored to the ground 30-meters from the base of the tower.

327. ## Algebra

How do I write an equation of a line that passes through the point (-31,22) and is parallel to this equation: 16x + 13y= -210

328. ## math

How many btu's are absorbed when100 lbs of water is heated from 100f to200f

329. ## math

Beth makes a quilt that was 3 ft wide. Its perimiter was 16 ft. What was its area?

330. ## algebra

21/25 times 10/99 times 27/14

331. ## math

jan bought 17 stamps. andy bought 3 times as many stamps. how many stamps did andy buy

332. ## Algebra

How do I write an equation of a line that passes through the point (-31,22) and is parallel to this equation: 16x + 13y= -210

333. ## Trig

Four wires support a 40-meter radio tower. Two wires are attached to the top and two are attached to the center of the tower. The wires are anchored to the ground 30-meters from the base of the tower. What is the total length of wire needed?

334. ## Algebra

If a temperature dropped from 44degrees to -56 degrees in a 24 hour period, how many degrees did the temperature drop during that time?

Name one similarity and one difference between pitch and loudness

336. ## Maths

In a quadratic sequence.....Term 2 is 11,Term 4 is -7,term 7 is -64....determin the general term for the sequence

337. ## SCIENCE URGENT HELP

what are the benefits of copper to the industry, economy, and society? what are all the organisms that are affected by copper? what is meant by the term Bioaccumulation? Include the names of any organisms that are affected and how they are affected by

338. ## trig

A population of wolves in a country is represented by the equation p(t)=80(0.98)^t, where t is the number of years since 1998. Predict the number of wolves in the population in the year 2008. how many years will it take for the population of wolves to

339. ## Maths

(a) find d largest four digit number which has a total of exactly 3 factors. Assuming that one and the number itself are factors. (b) find a and b greater than zero such that a^2=b^3. (c) find. x and y such that x^3 + y^3 =1729

340. ## Algebra

How do I write an equation of a line that passes through the point (-28, -5) and is parallel to y= -5 45 X - _ __ 8. 2

341. ## Science

What is the momentum of a 50 kg carton that slides at 2 m/s across an icy surface? The sliding carton skids onto a rough surface and stops in 3 s. Calculate the force of friction it encounters.

342. ## Social Studies

Which of the following did not influence greek mythology? a. the kingdom of Minos b. knowledge of Egyptian mythology c. Roman culture d. Mycenae culture

343. ## Physics

One component of a magnetic field has a magnitude of 0.0445 T and points along the +x axis, while the other component has a magnitude of 0.0725 T and points along the -y axis. A particle carrying a charge of +1.01 × 10-5 C is moving along the +z axis at a

344. ## college algebra

given the function fx=x^3+x a) find the rate of change between the two stated values for x: 1 to 2 B)find the equation of a secant line containing the given points (1,f(1))and (2,f(2)

345. ## math

1. Mickey has the number of books that Minnie does. If they had 1 less book between them, they would have 27 books. The question, of course, is how many books each has.

346. ## World History- (Ms. Sue)

What are the effects of abolitionism?

347. ## Social Studies

The Oracle of Zeus was located in a.Delphi b.Samos c.Sparta d.Mount Olympus

348. ## Physics

The radius of the earth is 6.37*10^6 m and its mass is 5.975*10^24 kg. Find the earth's average density to appropriate significant figure.

349. ## Physics

In the sport of skeleton a participant jumps onto a sled (known as a skeleton) and proceeds to slide down an icy track, belly down and head first. In the 2010 Winter Olympics, the track had sixteen turns and dropped 126 m in elevation from top to bottom.

351. ## CSU

what is the freezing point of 16.7g of LiCl in 136g of water, assuming complete dissociation for water kf= -1.86/mol

354. ## Chemistry

what is the empirical formula for a compund with 26.2 g N, 7.5 g H, and 66.3 g Cl?

355. ## Chemistry

I have o.236 g for urea and 0.235g for NaCl. And the question is On a gram basis, which is more effective in depressing the freezing point, urea or NaCl? On a mole basis, which Is more effective? I am confused on what depressing the freezing point me and

356. ## math fractions

ADAM WANTS TO COMPARE THE FRACTIONS 3/12,1/6,AND1/3.HE WANTS TO ORDER THEM FROM LEAST TO GREATEST AND REWRITE THEM SO THEY ALL HAVE THE SAME DENOMINATOR?EXPLAIN HOW ADAM CAN REWRITE THE FRACTIONS?If anyone could helpme explain this to my 4 th grader.i am

357. ## Physics

The radius of the earth is 6.37*10^6 m and its mass is 5.975*10^24 kg. Find the earth's average density to appropriate significant figure.

358. ## science

why is viscosity such an important property of matter?

359. ## Lang. Arts

The line “Where water is not thirsty” is an example of which type of figurative language? A.symbol B.metaphor C.simile D.personification I think it is D...?

360. ## science

You are standing stationary along the side of the railroad tracks. A toy cannon shoots a baseball at 9 m/s. The cannon is mounted facing forward on the handlebars of a bike. Your friend is riding the bike from the front toward the back of a train car at 5

361. ## Math

At a certain time of day, a tree that is Xft tall cast a shadow that is X-35 meters long if the distance from the top of the tree to the end of the shadow is X+5 meters, what is the height, X, of the tree?

362. ## Algebra 2..

a rule of thumb used by car dealers is that the trade in value of a car decreases by 20% of its value each year. suppose the initial value of your car is \$23,500. write an equation expressing the trade in value of your car as a function of the number of

363. ## Lang. Arts

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