# Questions Asked onDecember 1, 2012

1. ## calculus

A water-trough is 10m long and has a cross-section which is the shape of an isosceles trapezoid that is 30cm wide at the bottom, 80cm wide at the top, and has height 50cm. If the trough is being fi lled with water at the rate of 0.2 m3/min, how fast is the

2. ## algebra

suppose you want to build a rectangular sandbox where the width is 4 ft less than the length and the diagonal is 4 ft longer than the length. what are the dimensions

3. ## chemistry

Rank these ions according to ionic radius (lowest to highest) Mg^2+, N^3-, O^2-, Na^+, F^- can you explain how you got your answer? thanks!

4. ## solid mensuration

Determine the area of the segment of a circle if the length of the chord is 15 inches & located 5 inches from the center of the circle.

5. ## solid mensuration

Two perpendicular chords divide a circle with a radius of 13 cm into 4 parts. If the perpendicular distances of both chords are 5 cm each from the center of the circle, find the area of the smallest part. Please include solution. Thanks.

6. ## chemistry

How would the 2s and 3p orbitals differ from the 1s and 2p orbitals? Check all that apply. possible answers The and orbitals would have more nodes than and orbitals. The orbital would be the same shape as the orbital but would be smaller in size. The and

7. ## English

i need some help with qustions for this story Identities - W.D. Valgardson Normally, he goes clean-shaven into the world, but the promise of a Saturday liquid with sunshine draws him first from his study to the backyard, from there to his front lawn. The

8. ## Finance

Calculating Cost of Equity. The Lo Tech Co. just issued a divident of \$2.20 per share on its common stock. The company is expected to maintain a constant 6 percent growth rate in its dividends indefinitely. If the stock sells for \$43 a share, what is the

9. ## math - linear programming

A woman wishes to invest \$12,000 in three of bonds: municipal bonds paying 7% interest per year, bank investment certificates paying 8%, and high-risk bonds paying 12%. For tax reasons she wants the amount invested in municipal bonds to be at least three

10. ## calculus

use the given zeros to find the remaining zeros of the function h(x)=x^4-9x^3+12x^2+138x-1360 zero:3-5i enter the remaining zeros of f please show work

11. ## chemistry

pls help. A weak acid HA (pKa = 5.00) was titrated with 1.00 M KOH. The acid solution had a volume of 100.0 mL and a molarity of 0.100 M. Find the pH at the following volumes of base added and make a graph of pH versus Vb: Vb = 0, 1, 5, 9, 9.9, 10, 10.1,

12. ## Chemistry

25.00 mL of a solution of oxalic acid are titrated with 0.2586 m NaOH (aq). The stoichiometric eend point is reached when 43.42 mL of the solution of base is added. What is the molarity of the oxalic acid solution? Oxalic acid reacts with sodium hydroxide

13. ## physics

When a 2.9 kg object is suspended in water, it "masses" 1.5 kg. What is the density of the object?

14. ## physics

an automobile moving at constant velocity of 15m/sec passes a gasoline station. two seconds later another automobile leaves the gasoline station and accelerates at a constant rate of 2m/ sec squared. how soon will the second automobile overtake the first ?

A 0.63-kg metal sphere oscillates at the end of a vertical spring. As the spring stretches from 0.13 to 0.22 m (relative to its unstrained length), the speed of the sphere decreases from 5.95 to 4.75 m/s. What is the spring constant of the spring? (The

16. ## physics

A 1000 kg car is rolling down the street at 2.5 m/s. How fast would a 2500 kg car have to collide into it in order to bring it to rest (0 m/s)?

17. ## grammar

revise the following sentences to eliminate faulty sentence structure, making them clear and grammatically need help with the following sentences: An effective Web site is well designed, provides useful information, and links are given to other relevant

18. ## Chemistry

Dimethylamine burns in oxygen according to the following equation: 4 C2H7N + 15 O2 → 8 CO2 + 14 H2O + 2 N2 (a) How many liters of O2 at 35 °C and 0.840 atm will be needed to burn 7.70 L of C2H7N at 35 °C and 0.840 atm? (b) How many liters of CO2 at 35

19. ## Chemistry

Calculate delta H for this reaction: N2 + 3H2 --> 2NH3 I am given the bond dissociation energy for N-N (163 kJ/mol), H-H (436 kJ/mol), and N-H (391 kJ/mol) I can't seem to find a similar problem anywhere, they are all given 2 or 3 similar equations.

20. ## physics

After 6.00 kg of water at 80.4 oC is mixed in a perfect thermos with 3.00 kg of ice at 0.0 oC, the mixture is allowed to reach equilibrium. When heat is added to or removed from a solid or liquid of mass m and specific heat capacity c, the change in

21. ## solid mensuration

Find the area of a segment of a circle whose diameter is 16 cm & the central angle measures 80 degrees. Please include solution. Thanks.

22. ## statistics

sample size needed with a mean of 100,standard deviation of 20 for the the population of normal adults an iq range to fall between 2 iq points with 95% confidence interval

23. ## Physics

a tennis ball is thrown vertically upward from the ground and the student gazing out of the window sees it moving upward pass him at 5 m/sec. the window is 10 m above the ground. how high does the ball go above the ground

24. ## physics

Two astronauts, each having a mass of 78.5 kg, are connected by a 10.0-m rope of negligible mass. They are isolated in space, moving in circles around the point halfway between them at a speed of 5.50 m/s. Treating the astronauts as particles, calculate

25. ## physics

After 6.00 kg of water at 80.4 oC is mixed in a perfect thermos with 3.00 kg of ice at 0.0 oC, the mixture is allowed to reach equilibrium. When heat is added to or removed from a solid or liquid of mass m and specific heat capacity c, the change in

26. ## science

A wolf us chasing a rabbit.Graph the wolf's motion using the following data: 15 m\s at 0 s,10 m\s at 3 s,1 m\s at 4 s,and 0 m\s at 5 s.What does the graph tell you???

27. ## science

To 90.0mL of a solution that contains 0.100M Cr(NO3)2 and 0.490M HNO3 is added 30.0mL of 0.170M K2Cr2O7. The dichromate and chromium(II) ions react to give chromium(III) ions. Write a balanced net ionic equation for the reaction.

28. ## math

The graph shows the cost C in dollars to rent a car for one day as a function of the number m of miles driven. Which of the following functions models the situation?

29. ## math

The number of patients treated at Dr. Artin’s dentist office each day was recorded for nine days. These are the data: 6, 6, 6, 5, 5, 6, 5, 6, 5. Find the mean, median, mode, and range of the data. If necessary, round to the nearest tenth

30. ## CHEMISTRY

Suppose that a fully charged lead¨Cacid battery contains 1.16 L of 5.00 M H2SO4. What will be the concentration of HSO4- in the battery after 2.83 A of current is drawn from the battery for 6.3 h? Pb(s) + PbO2(s) + 2H+(aq) + 2HSO4−(aq) ¡ú 2PbSO4(s) +

31. ## ACCOUNTING

Mills Company uses standard costing for direct materials and direct labor. Management would like to use standard costing for variable and fixed overhead. The following monthly cost functions were developed for manufacturing overhead items: Overhead Item

32. ## math

What does the line y = 3x - 7 look like? horizontal vertical slanted right upwards slanted right downwards

33. ## solid mensuration

Find the area of a cyclic quadrilateral whose 2 sides measure 4 & 5 units, & whose diagonal coincides with a diameter of the circle. Suppose the radius of the circumscribing circle is 2 sq.root of 3 units. Please include solution. Thanks.

34. ## chemistry

Urbium (Ur) is an upscale element found in big cities. Its oxide (UrO2) is not very stable and decomposes readily at temperatures exceeding 66∘ C. The figure below shows how the rate of reaction varies with the concentration of UrO2 at 75∘ C. The rate

35. ## Science

A box of 5 kg mass slides horizontally on the floor for along a distance 9m in 3s due to a constant force. The magnitude of the constant force is ...

36. ## Math

Could someone explain how to solve this math problem? I've graphed it, but I'm not sure how to solve the rest of the questions. The National Oceanic and Atmospheric Administration (NOAA) has been measuring atmospheric carbon dioxide concentations (in parts

1. A synonym for writhe is (1 point) hop. twist. cry. 2. In which part of the plot is the conflict resolved? (1 point) exposition climax resolution 5. The part of a narrative that introduces the setting and the characters is called the (1 point) climax.

38. ## Coordination Chemistry

A particular metal ion octahedral complex has the same number of unpaired electrons (non-zero) whether the complex uses weak or strong field ligands. List several fourth period transition metal ions that could have this behavior. Also, if someone could

39. ## Probability

Can someone please help me. A single card is selected from a standard 52-card deck. B= the drawn card is black; R= the drawn card is red; Q= the drawn card is a queen; F= the drawn card is a face card ( a king, queen or jack). Without finding the

40. ## cis

1. Find a mortgage loan calculator to determine what your monthly payments would be on a new house borrowing \$200,000 for 15 years at 3.5% interest. What is your monthly payment? (Include the URL)

41. ## algebra

A rectangle has a width of 8 meters. The length is twice as long as the width. What is the length of the diagonal? Show your work

42. ## Chemistry

A sample of charcoal is found to have only 1/8th of Carbon-14. Half-life of Carbon-14 is 5730yrs, what is the age of the charcoal?

43. ## Statistics

62.Refer to the Baseball 2009 data, which report information on the 30 Major League Baseball teams for the 2009 season. a. At the .05 significance level, can we conclude that there is a difference in the mean salary of teams in the American League versus

44. ## algebra

The measurement of two angles of a triangle are 69 degrees and 34 degrees. Find the measurement of the third angle. Show your work

45. ## physics

Three resistors are connected to a 20 V battery as shown. The internal resistance of the battery is negligible. (a) What is the current through the 15 resistance? (b)What is the voltage difference across the 20 resistance?

46. ## Chemistry

A set of bookshelves rests on a hard floor surface on four legs, each having a cross-sectional dimension of 2.7 5.2 cm in contact with the floor. The total mass of the shelves plus the books stacked on them is 246 kg. Calculate the pressure in pascals

47. ## Microbiology

How are algae harmful to humans?

48. ## PHYSICS

The wattage of a commercial ice maker is 226 W and is the rate at which it does work. The ice maker operates just like a refrigerator and has a coefficient of performance of 3.90. The water going into the unit has a temperature of 15.0°C, and the ice

49. ## Physics -parachute

A man is descending in a parachute of total mass 125 kg with a constant velocity. What is the air resistance the parachutist experiences in N?

50. ## grammar

need help with this one : 2. To enroll in film school being my primary goal, so I am always saving my money and watching for scholarship opportunities.

51. ## Chemistry

Antacid tab is dissolved in water and a few drops of phenolphthalein is added yielding bright pink solution. 0.2025 M HCl added until pink color disappears. The 0.2147 M NaOH added until it turns light pink for ~30 seconds. mass on antacid tablet = 1.056g

52. ## math

What is the rule for this function? Input 1 output 3 Input 2 output 5 Input 4 output 9 Input 5 output 11 Input 10 output 21 Input 12 output 25 Please help thanks

53. ## Macroeconomics

Goods and services that are not sold in markets, such as food produced and consumed at home and some household articles, are generally not included in GDP. How might the absence of these values mislead one when comparing the economic well-being of the

54. ## ELA

Is it possible if you can shorten the text: Perindnes Tree, its sweet fruit throughout the tree is remarkably pleasing; a dove’s delight living in the tree. Living in India with rich and vibrant colors exotic, expressive, and aromatic; what could the

55. ## college algebra

find the equation of the line that is parallel to the line y=15x and contains the point (1,-4) y= find the distance d (p_1, and p_2) between the points p_1 and p_2 p_1=(-2,1) p_2=(1,4)

56. ## Chemistry

You have a single crystal of 100% pure gold. Identify which of the following defects you would expect to be present at room temperature. Free surface Grain boundaries Vacancies Inclusions Substitutional impurity atoms Interstitial impurity atoms

57. ## Chemistry

Half-life N2O5 dissolved in CCl4 decomposes to give N2O4 and O2. The reaction is first order with a half-life of 1234 seconds. How long will it take, in seconds, for the concentration of N2O5 to fall to 1.1% of its initial value?

58. ## calculus

Find a number x0 between 0 and pi such that the tangent line to the curve y = sin x at x = x0 is parallel to the line y = -x=2. I get that for both lines to be parallel to each other their slopes need to be the same. I found -1/2 = cos(x) but I get stuck

59. ## solid mensuration

A circle has an area equal to 25 pi sq.cm. Its diameter AB coincides with one of the sides of triangle ACB in which the vertex C lies on the circle. If the triangle has an area equal to 11 sq.cm, find its perimeter. Please include solution. Thanks.

60. ## Medical Terminology

In the brain area, what function controls the sleep cycle? (a) pons (b) midbrain (c) mdulla oblongata (d) hypothalamus When I looked in my medical terminology book,it had told me something else and these did not seem to be th answer. According to the book

61. ## college algebra

for the given function f&g, find the following and state the domain of each result f(x)=2x+1/9x-5; g(x)4x/9x-5 a.(f+g)(x)= what is the domain? b.(f/g)(x)= what is the domain? please show work answer the following for the given quadratic function

62. ## calculus

lim x->0 x^sin(x)

63. ## physics

The wattage of a commercial ice maker is 226 W and is the rate at which it does work. The ice maker operates just like a refrigerator and has a coefficient of performance of 3.90. The water going into the unit has a temperature of 15.0°C, and the ice

64. ## physics

The hot reservoir for a Carnot engine has a temperature of 926 K, while the cold reservoir has a temperature of 441 K. The heat input for this engine is 3730 J. The 441-K reservoir also serves as the hot reservoir for a second Carnot engine. This second

65. ## Physics

An object is placed 11 cm in front of a convex mirror of focal length 4 cm. Using the lens equation, find where the image will form and state whether it is a real or virtual image.

66. ## Physics

An object is placed 4 cm in front of a concave lens of focal length 3 cm. Using the lens equation, find where the image will form and state whether it is a real or virtual image.

67. ## Science

A hirozontal force F works on a body of mass m1 and accelerates it by 5m/s^2. The same magnitude of horizontal force is exerted to another body of mass m2, which accerelates it by 2m/s^2. If m1 and m2 are combined, the acceleration provided by the force F

68. ## Physics

An object ob 2 kg mass is initially at rest on the ground. then, the object is pulled up by a 20N force in 4s before it is finally released. the maximum height that the one object can reach is ...

69. ## Science

A 5kg stone is lifted by a rope. its acceleration is 3m/s^2. the tention of the rope is ...

70. ## UNIVERSITY PHYSICS 1

Find the magnitude of vectors A=?+4j+4k B=?+2j+3k if angle between them 15 deegres a) By scalar product b) by vector product

71. ## Math

A gardener is putting a fence along the edge of his garden. If he has 20 m of fence , what is the largest area he can enclose? How can a graph solve the problem? What quadratic equation represents the area of the garden?

72. ## Instalment purchases

The cash price of a speed boat is RM60,000. Under an installment plan, a buyer may pay a 30% down payment followed by monthly payments for 5 years. If the interest is 6% on the reducing balance, calculate (i) the amount of interest using the constant ratio

73. ## precalculus

Find all solutions of the system of equations. Order your answers from smallest to largest x, then from smallest to largest y.) x^2 + y2= 53 x2− y2= 3

74. ## Math

1.What is the sum of the digits in the expanded form of the number 384cuberoot x5raised to the 20?What is 384cube root x5raised to the 20 in scientific notation?

75. ## precalculus

Find all solutions of the system of equations. (If there is no solution, enter NO SOLUTION.) 4x^2− 27y^3 = 35 8x^2+54y^3= 74

76. ## solid mensuration

Find the area of a portion of a semicircle of radius 15 m that is outside the area of an inscribed square if the base of the square lies on the diameter of the semicircle. Please include solution. Thanks.

77. ## Biochemistry

Appreciate if you could help me answering the following questions! thank you!! How would you prepare a 20% homogenate from a 2.0g of liver using 0.25M sucrose? why is it necessary to cool the homogenate during homogenization?

78. ## writing

I have to write a reflection paper about volunteering should I just write about what happened daily.

A 68.6-kg circus performer is fired from a cannon that is elevated at an angle of 43.6° above the horizontal. The cannon uses strong elastic bands to propel the performer, much in the same way that a slingshot fires a stone. Setting up for this stunt

80. ## political science- PHL

hello can u help me please? write a few words about Machiavelli, Locke and how they are relevant today? John Locke is another philosopher who is considered as relevant today for some of his ideas he expressed. His writings were a great influence to the

81. ## political science- PHL

how Hobbes, Machiavelli and Rousseau are relevant? little guidance please

82. ## learning skills

what is the best way to learn a new material?

83. ## Probability

Can someone please help me? certain medical diagnostic test is used to determine if people have pinkyitis and it is known that 1 in 1300 Americans has the disease. The test correctly diagnoses the presence of pinkyitis 97% of the time and it correctly

84. ## political science- PHL

is it a comprehensive answer? Machiavelli (in terms of political philosophy) Machiavelli was an Italian philosopher. A famous book he wrote is ‘The Prince’ which still have impact to today’s politics. It is about the rise and fall of states and what

85. ## Physics

An object is placed 11 cm in front of a convex mirror of focal length 4 cm. Using the lens equation, find where the image will form and state whether it is a real or virtual image.

asked by Bob Any help is appreciated
86. ## geometry

if two opposites vertices of a square are (0,1)and(4,3)find the other vertices

87. ## Chemistry

How many grams of KHP (204.22 g/mol) were present in container if 49.36 mL of 0.2264M NaOH were needed to reach the end point of a titration? I'm confused on the formula you would use for this.

88. ## biochemistry

discuss at least six factors affecting the performance of an enzyme. Thank you.

89. ## college algebra

1. find the equation of the line with the given properties. Express the equation in general form or slope-intercept form. perpendicular to the line -3x_y= -27; contains the point (9, -1) the equation of the line is ? 2. solve the polynomial inequality and

90. ## Calculus

d/dx[lnsquare root of(x^3) cube root of (x+3) fifth root of (3x-2)]

91. ## Business maths - Instalment purchases

The cash price of a speed boat is RM60,000. Under an installment plan, a buyer may pay a 30% down payment followed by monthly payments for 5 years. If the interest is 6% on the reducing balance, calculate (i) the amount of interest using the constant ratio

92. ## algebra

1. the function f(x)=6x/3x-5 is one to one. find its inverse and check your answer. And on the second one can you tell me if I am correct. 2. solve the following exponential solution 7^2x+7^x+1-60=0 7^2 x+7^x-59=0 (49x)+7^x-59=0 49x/49=0/49 x=0/49 x=0

93. ## math

A rectangular room is 20 feet long and 10 feet wide. If you paint a red rectangle on the floor that is 8 feet long and 3 feet wide, what is the area of the floor in the room that will NOT be red?

94. ## English

(1) After my interview with these four young people, I reflected on the quiet sense of "difference" I sensed with many of these Upward Bound students. (2) As a college teacher who has also taught seventh-grade science, I have some experience with the faces

95. ## Intermediate Algebra

what is 2x to the second power equals 54

96. ## physics

Two soccer players start from rest, 41 m apart. They run directly toward each other, both players accelerating. The first player’s acceleration has a magnitude of 0.55 m/s2. The second player’s acceleration has a magnitude of 0.43 m/s2. (a) How much

97. ## algebra

A water faucet is located in one corner of Juan's garden. He wants a garden hose long enough to reach the farthest corner of the garden. The garden is rectangular with sides of 10 feet and 15 feet. How long should the garden hose be? Show your work

98. ## math

Iused 8 cubes to make a large cube.How many cubes will i need to make a 4^4^4 cube ?

99. ## math

Input 1 2 4 5 10 12 Output 3 5 9 11 21 25 Write the rule

100. ## algabra 2

list all the possible rational roots of 6x4-2x3+5x2+x-10=0

101. ## Trigonometry

What is sin(cos^-1 a) when 0 < cos^-1 a < 90

102. ## communication

we know that relationships develop in satges. how does movement through relationships work

103. ## Science

You may have heard "Nothing is Free" explain why this is true

104. ## PHYSICS

The wattage of a commercial ice maker is 226 W and is the rate at which it does work. The ice maker operates just like a refrigerator and has a coefficient of performance of 3.90. The water going into the unit has a temperature of 15.0°C, and the ice

105. ## Trigonometry

triangle ABC is isosceles, with AB=AC=15cm , and m

106. ## Statics

A candy machine distributor collects the coins from 100 machines. The standard deviation is \$3.25. With probability 98%, what is the maximum error about the true mean that will result?

107. ## Statics

A random sample of 100 cans of peaches has an observed mean weight of 48.5 ounces and a standard deviation of 2.4 ounces. Determine the lower limit of the 95% interval for the true mean weight. The can label says that the can weights 48 ounces. Comment on

108. ## physics

A potter's wheel having a radius 0.45 m and a moment of inertia of 14.9 kg · m2 is rotating freely at 49 rev/min. The potter can stop the wheel in 8.0 s by pressing a wet rag against the rim and exerting a radially inward force of 72 N. Find the effective

109. ## Statics

A power company takes a random sample of its delinquent account files. For 400 accounts, the average delinquent amount was \$239.30 with a standard deviation of \$14.52. With 99% probability, determine the maximum error of the estimate for the mean of all

110. ## Statics

In designing an experiment, a psychologist is willing to assume that the underlying distribution for the time to learn a list of words is approximately normal with a standard deviation of 40 seconds. He wants to be 95% sure that the maximum error of his

111. ## Social Studies

Match each statement below with the constitutional principle it illustrates. P-Popular soverignty R-Republicanism F-Federalism L-Limited Government S-Separation of powers C-Checks and balances Citizens elect senators to Serve in Washington, D.C. R? The

112. ## math

the quotient of 65 and y translated into math

113. ## Physics HW Help, Please

What is the energy required to accelerate a 1600 kg car from rest to 33 m/s?

114. ## 7 th grade math

What is the rule for this function? input 1 output 3 input 2 output 5 Input 4 output 9 Input 5 output 11 Input 10 output 21 Input 12 output 25 Please help now thanks

115. ## chemistry

How many atoms of tin are necessary to react completely with 7.42 x 10(24th)g of HF. Sn(s) + 2HF(g) = SnF2(S) + H2 (g)

116. ## Cultural Anthropology 101

What do I see as the strengths and weaknesses of each of these three kinds of relativism. I posted my answer but apparently I am missing something from the text that I am not grasping can someone please help me.

117. ## 7 th grade math

Input 1 2 4 5 10 12 Output 3 5 9 11 21 25 What is the rule for this function ? If adding add what tried 2 Need help please

118. ## Analytical Chemistry

Consider the titration of 100.0 mL of 0.100 M NaOH with 1.00 M HBr. Find the pH at the following volumes of acid added and make a graph of pH versus Va: Va = 0,6 and 12 mL

119. ## calculus

take the limit as x goes to infinity: (14x/(14x+3))^(4x)

120. ## algebra

The measurement of two angles of a triangle are 39 degrees and 70 degrees. Find the measurement of the third angle. Show your work

121. ## math

Are the following statements and valid null and alternative hypotheses? (

122. ## algebra

The measurement of two angles of a triangle are 44 degrees and 56 degrees. Find the measurement of the third angle. Show your work

123. ## College Math

Volunteers working to raise funds for a new community library sold 1000 raffle tickets at \$10 each. Tickets are to be randomly drawn and prizes are awarded as follows: one prize of \$1,000, twenty prizes of \$50 and one hundred prizes of \$20. What is the

124. ## english literature

Came to America to find freedom to worship and the Promised Land =a.)The North--Puritanism b.)The South---Gentlemen Planters c.)Both

125. ## math

The area of a table top can be represented by l× w where l is the length and w is the width.What is the area of the table top if l=60 in and w=40 in?

126. ## yeah

a farmer wants to fence in three sides of a rectangular field with 1,000 feet of fencing. the other side of the rectangle will be a river. find the dimensions of the field.

127. ## 7 th grade math

Input 1 2 4 5 10 12 Output 3 5 9 11 21 25 What is the rule for this function ? If adding add what tried 2 Need help please

128. ## college physics

A cubic crate of side s = 2.5m is top-heavy: its CG is 19cm above its true center. Part A How steep an incline can the crate rest on without tipping over? Part B What would your answer be if the crate were to slide at constant speed down the plane without

129. ## CRT 205

I am having trouble finding the premise in the article Cyberbullying is Not Worse than Physical Bullying

130. ## Chemistry

What is the molar mass of a compound if a gaseous sample has a density of 2.807 g/L at 18 °C and 728 torr?

131. ## Human Resources

9.1 The following data represent total personnel expenses for the Palmdale Human Service Agency for past four fiscal years: 20X1 \$5,250,000 20X2 \$5,500,000 20X3 \$6,000,000 20X4 \$6,750,000 Forecast personnel expenses for fiscal year 20X5 using moving

132. ## math

A right-tailed test is used when .

4 1\6

134. ## physics

A baseball is thrown at an angle of 40.0 above the horizontal.The horizontal component of the baseball's initial velocity is 12.0 m/s^2 . What is the magnitude of the object's acceleration?

135. ## physics

A baseball is thrown at an angle of 40.0 above the horizontal.The horizontal component of the baseball's initial velocity is 12.0 m/s^2 . What is the magnitude of the object's acceleration?

136. ## algebra

Two angles of a scalene triangle measures 42 degrees and 70 degrees. Which of the following is the measure of the third angle?

137. ## Science: Physics

A force of 50 N directed at an angle of 45 degrees from the horizontal pulls a 70 kg sled across a frictionless pond. The acceleration of the sled is most nearly (sin 45 degrees = cos 45 degrees = 0.7).

138. ## Math

Volunteers working to raise funds for a new community library sold 1000 raffle tickets at \$10 each. Tickets are to be randomly drawn and prizes are awarded as follows: one prize of \$1,000, twenty prizes of \$50 and one hundred prizes of \$20. What is the

139. ## Chemistry

When excess solid Mg(OH)2 is shaken with 1.00 L of 1.2 M NH4Cl solution, the resulting saturated solution has pH = 9.30. Calculate the Ksp of Mg(OH)2

140. ## World History

How might a totalitarian state today be different from one during Stalin's time of rule? Explain.

141. ## Chemistry

How do you find the concentration of an acid if 35.0 mL of 0.20 M NaOH is required to neutralize 45.0 mL of HCL. Do you know how I would calculate this?

142. ## English

Anyone read I am looking for the queen's dream in Aeschylus' Persians;what was interpreted as and the meaning of it

143. ## math

What is the rule for this function? Input 1 output 3 Input 2 output 5 Input 4 output 9 Input 5 output 11 Input 10 output 21 Input 12 output 25 Please help thanks

144. ## biology

would you expect whitefish embryo cells to divide indefinitely?

145. ## math

3 less than or equal to 4x-3 less than 19?

146. ## physics

A cylinder is fitted with a piston, beneath which is a spring, as in the drawing. The cylinder is open to the air at the top. Friction is absent. The spring constant of the spring is 4100 N/m. The piston has a negligible mass and a radius of 0.010 m. (a)

147. ## physics

Calculate the speed of a 10,000 kg airliner with a kinetic energy of 3.1 x 10^9 J.

148. ## Physics

Assuming there is no conduction or convection operating, a cold object in a warm room: A.Radiates more energy than it absorbs B.Absorbs more energy than it radiates C.Only absorbs energy; it does not radiate because it is colder than its environment.

149. ## Chemistry

how can a salt be related to a particular acid and a particular base

150. ## Physics

Which kind of pot would be better to use on a halogen cooktop? A. A shiny stainless steel pot B. A black cast iron pot C. It's equally OK to use either as long as you adjust the thickness so that the heat conduction is the same.

151. ## Chemistry

how can a salt be related to a particular acid and a particular base

152. ## Annuity

Ahmad bought a set of sofa and paid RM200 as a down payment. The balance was to be paid by monthly payments of RM150 for two years. The interest rate was charged 10% per annum based on the original balance. Find i) the amount of the loan, ii) the cash

153. ## math

The ratio of the number of girls to the number of boys in a stamp club was 3 : 2 last year. When 15 boys joined the club this year, the ratio became 2 : 3. Find the total number of children in the club this year.

154. ## math

an investor invested a total of \$2,900 in two mutual funds. One fund earned a 7% profit while the other earned a 2% profit. If the investor's total profit was \$108, how much was invested in each mutual fund?

155. ## MATH

MY DAUGHTERS HOMEWORK IS TO MAKE APPLE 10 PACKS. SOME ARE RED AND SOME ARE YELLOW PLS HELP

156. ## PHYSICS

After 6.00 kg of water at 80.4 oC is mixed in a perfect thermos with 3.00 kg of ice at 0.0 oC, the mixture is allowed to reach equilibrium. When heat is added to or removed from a solid or liquid of mass m and specific heat capacity c, the change in

157. ## precalculus

Find the focus, directrix, and focal diameter of the parabola. 9x + 7y2 = 0 my answers were focus = -9/28,0 fd =9/7 directrix= -9/28 (this ans. is incorrect) what am I missing? pls help

158. ## precalculus

Find the focus, directrix, and focal diameter of the parabola. x = −4y2 I answered everything right except the directrix. which my ans was -1/16.

159. ## grammar

i need to correct them this sentences 4. Irony is when you expect one thing and get something else. 5. By turning off the water when you brush your teeth, you can save up to eight gallons of water per day.

160. ## Chemistry

how do you find the pH of a titration solution at its halfway point to the equivalence, and how would it affect solutions dealing with strong acids and strong bases, this is an example just to see it quantitatively: 100.0 mL of 0.100 M HF (Ka = 7.2 x 10-4)

161. ## physics

Calculate the speed of a 10,000 kg airliner with a kinetic energy of 3.1 x 10^9 J.

162. ## Chemistry

If the sign contains neon at a pressure of 1.72 torr at 32 C, how many grams of neon are in the sign? (The volume of a cylinder is pie r2 h.)

163. ## chemistry

At 25°C the vapour pressure of pure pentane is 511 torr and that of hexane is 150. torr. What is the mole fraction of pentane in a pentane-hexane solution that has a vapour pressure of 333 torr at 25°C?

164. ## geometry

abcd is a rectangle. If measure angle bac=30 find the measure of angle dbc

165. ## Trigonometry

what is the trigonometric form of z=1+i?

166. ## Chemistry

If you place 10.0 L of propanol (C3H8O) in a sealed room that is 7.5 m long, 3 m wide, and 3 m high, will all the propanol evaporate? If some liquid remains, how much will there be? The vapor pressure of propanol is 10.7 torr at 25 °C, and the density of

167. ## statistics

historically, the mean timr to complete this statistics test is 54 minutes with a standard deviation of 9 minutes. how much time should i allow, if my goal is for 95% of the students to be able to complete this test

168. ## calculate rms

calculate the rms speed of nf3 molecules at 23 C?

169. ## physics

(a) a spherically shaped buoy is made from wood, which has a specific gravity of 0.6. find the acceleration of the buoy when released from rest at the bottom of a freshwater lake. (b) if the buoy starts out 10 m below the surface of the water, determine

170. ## Math

Can someone please help me? certain medical diagnostic test is used to determine if people have pinkyitis and it is known that 1 in 1300 Americans has the disease. The test correctly diagnoses the presence of pinkyitis 97% of the time and it correctly

171. ## Chemistry

The compound CH3F has van der Waals constants a = 5.009 atm•L2 /mol 2 and b = 0.0562 L/mol. Using both the ideal gas law and van der Waals’s equation, calculate the pressure expected for 25 mol of CH3F gas in a 5.00-L container at 75 °C. no idea how

172. ## college algebra

1. answer the following for the given quadratic function f(x)=x^2+10x-11 a.what is the vertex (h,k) of f? b. what is the axis of symmetry? Please show work. 2. if f(x)=Inx, g(x)=e^5x, and h(x)=x^6 find the following a. find (fog)(x)= what is the domain of

173. ## chemistry

pls help i need the answer not jus part of it, pls im really stuck out here. A buffer was prepared by dissolving 0.100 mol of the weak acid HA (Ka = 1.00 × 10−5) plus 0.050 mol of its conjugate base Na+A− in 1.00 L. Find the pH.

174. ## Chemistry

How to work out: The half-life of Indium-116 is 14 seconds. How long will it take for 32g of this isotope to decay to 1.og?

175. ## chemistry

pls help me. A buffer was prepared by dissolving 0.100 mol of the weak acid HA (Ka = 1.00 × 10−5) plus 0.050 mol of its conjugate base Na+A− in 1.00 L. Find the pH.

176. ## Physics

Consider an artery with diameter 10 mm which runs horizontally. Somewhere along the artery there is a 3 cm long constriction which reduces the diameter to 5.40 mm. Assume that before and after the constriction the blood flows at a rate of 0.310 m/s, and

177. ## Math

Can someone please help me. A single card is selected from a standard 52-card deck. B= the drawn card is black; R= the drawn card is red; Q= the drawn card is a queen; F= the drawn card is a face card ( a king, queen or jack). Without finding the

178. ## Calculus

integral[7 sqrt 2/2,0]sqrt(49+x^2) dx

179. ## college algebra

1.for the given function f&g, find the following and state the domain of each result. f(x)=2x+1/9x-5; g(x) 4x/9x-5 a.(f+g)(x)=? What is the domain? b. (f/g)(x)=? what is the domain? 2.the function f is defined as follows {x+6 if -5 ¡Üx1 a. the domain of

180. ## chem

Which ionic compound is expected to form from combining the following pairs of elements? yttrium and oxygen i put YO but its wrong

181. ## English-Speech

I am workng on my introduction part of my speech and here is my transition sentence: With my voice, I can make a difference in 5 different ways. Would these be like the examples of the "5 different ways" ? preventing people from doing a bad action, helping

182. ## Chemistry

You are given 2.677 g of a mixture of KClO3 and KCl. When heated, the KClO3 decomposes to KCl and O2, 2 KClO3 (s) → 2 KCl (s) + 3 O2 (g), and 605 mL of O2 is collected over water at 28 °C. The total pressure of the gases in the collection flask is 763

183. ## CHEMISTRY

A concentration cell is constructed of two hydrogen electrodes. The pressure of H2 is 1.00 atm in each hydrogen electrode. One of the electrodes is immersed in a solution with [H+] = 1.0 M and the other in a solution with 0.62 M NH3. What will be the value

184. ## physics

a 4.0-kg cart rolling east on a level, frictionless track at 14 m/s collides with a stationary 3.0-kg cart. After the collision, the 4.0-kg cart is still rolling east, now at a speed of 2.0 m/s. Was this collision elastic or inelastic?

185. ## chemistry

how many moles of NaCl are in a box of salt containing 425g NaCl

186. ## Math 8th Grade (Ms. Sue) ?

An artist makes a painting that is 12 feet by 9 feet. He paints a frame around the painting. The frame is 3 inches wide. What is the area of the frame? Please provide formula for figuring out. Answers (a)10.75ftsq(b)10.5ftsq (c)12.96ftsq(d)5.3125ftsq

187. ## Chmistry

28.31 mL of O2(g) at 1.00 atm pressure dissolve in 1.00 L of water at 25.0 °C. If the pressure of O2(g) is raised to 3.86 atm what will the new concentration of oxygen be expressed in mol/L

188. ## chemistry

how many moles of sugar are contained in a 10-lb bag of sugar if sugar has formula C12H22O11? first convert the pounds into grams, then grams into moles.

189. ## math

How would we solve for q: 6n-5q/11t=6

190. ## math

How would i solve this x+7/14=1-3/7x

191. ## math urgent urgent urgent

x+2y=12 find intercept a circle equation x^2+y^2+4x-4y-1=0 and graph 2)find domain and range f(x)=x^2-4x-5 find vertex of f(x) =x^2+4x-21

193. ## math

A flagpole casts a 32-ft shadow. A boy who is 6 feet tall is standing near the flagpole casting a 16-ft shadow. They form similar triangles. How tall is the flagpole?

194. ## college algebra

1. solve the following logarithmic equation log_8(x+8)+log_8(x+7)=2 what is the exact solution 2.se the rational theorem to find all the real zeros of the polynomial function. use the zeros to factor f over the real numbers. f(x)=4x^4+5x^3+9x^2+10x+2

195. ## ELA

can you shorten it now: Living in India with rich and vibrant colors exotic, expressive, and aromatic; what could the doves possibly live in fear with? Dragons are the doves enemies & fear the perindnes tree. The shadow of the tree was casted east, the

196. ## independent practice

It has 5 hundreds . The tens digit is 1 lees than the hundreds digit.the ones digit is 2 more than the hundreds digit

197. ## MATH

AN INVESTMENT OF \$5000 IN THE STOCKMARKET WITH THE VALUE INCREASED BY 13% WILL EARN \$650 FROM THE VALUE OF THE STOCK (\$5000 x0.13) the new value would be \$5650(\$5000 PLUS \$650)

198. ## College Algebra

Write the expression as a single logarithm whose coeffecient is 1. Log x + 12 log y

199. ## Chemistry

Dimethylamine burns in oxygen according to the following equation: 4 C2H7N + 15 O2 → 8 CO2 + 14 H2O + 2 N2 (a) How many liters of O2 at 35 °C and 0.840 atm will be needed to burn 7.70 L of C2H7N at 35 °C and 0.840 atm? (b) How many liters of CO2 at 35

200. ## math

how do I solve: -3/7(m+5)=3+2m

201. ## Chemistry

What is the molar mass of a compound if a gaseous sample has a density of 2.807 g/L at 18 °C and 728 torr?

202. ## math

How do I solve 7/2t+2=4+7t

203. ## physics

A 4.55 kg object is released from rest while fully submerged in a liquid. The liquid displaced by the submerged object has a mass of 3.20 kg. How far and in what direction does the object move in 0.200 s, assuming that it moves freely and that the drag

204. ## math

about 7x10 to the power of 3 babies are born each day in the city. about how many babies are born each day in the city?.give the abswer un standard form