1. Trigonometry

A batter hits a ball with an initial velocity v0 of 100 feet per second at an angle theta to the horizontal. An outfielder catches the ball 200 feet from home plate. Find theta if the range of a projectile is given by the formula R=1/32v0 squared times sin

2. Physics => speed of sound variation

The speed of sound in air (m/s) depends on temperature according to aprox expression of v= 331.5 + 0.607 Tc Tc= temp in celcius In dry air, temperature decreases about 1deg celcius for every 150m rise in altitude. a) assume the change is constant up to

3. math

A veterinarian has instructed Harrison to give his 75lb dog one 325 mg aspirin tablet for arthritis. the amount of aspirin A remaining in the dog's body after t minutes can be expressed by A=325(1/2)^(t/15). write and solve a logarithmic inequality to find

4. physics

Running into the train at that speed would severely damage both train and passengers. Calculate the minimum time Superman must take to stop the train, if the passengers experience an average horizontal force of 0.520 their own weight. and How far does the

asked by katie(again same question diff parts)
5. Chemistry

Can someone help me balance this equation ZnCl2 + (NH4)2S ------- NH4Cl + ZnS

6. Chemistry - DrBob222

CH3OH + MnO4- ----> Mn2+ + CH2O Earlier I posted this question and then realized that CH3OH didn't have a charge. It changed my work because the oxidation state changed. Can you check if what I fixed is correct? CH3OH- + MnO4- ----> Mn2+ + CH2O 1e-/C

7. Physics - drwls can you help me with this?

A 2.00kg block hangs from a rubber cord, being supported so that the cord is not stretched. The unstretched length of the cord is 0.500m and it's mass is 5.00g.The "spring constant" for the cord is 100N/m. Block is released and stops at lowest point. a)

8. chemistry

i'm so confused with how to do these someone please help calculate the number of moles in each of the following masses a)64.1 g of aluminum b)28.1 g of silicon c)0.255 g of sulfur d)850.5 g of zinc

9. the novel

In The Call of the Wild, what valiant, tragic figure among the dogs must finally be put down for the good of the lives of the team?

10. pre ap chem

heating an ore of antimony and iron II sulfide. Sb2S3+3Fe-->2Sb+3FeS when 15g Sb2S3 reacts with an excess of Fe, 9.84g Sb is produced. what is the pecent yeild of this reaction?

11. the novel

If an author is skillful at representing the point of view and attitudes of a hobo, a nurse, a corporate CEO, and a variety of other diverse characters, the author is demonstrating

12. analogies

skill is to prowess consternation;fear orbit;planet fire;smoke journey;destination

13. toxicology- can someone re work this question?

Hi, I have to answer this question "why do we say that metabolism is the factor that most accounts for differences among species in the toxicity of some xenobiotics? I don't understand what the question means- I understand all the words in the question,

14. the novel

In The Call of the Wild, when London writes about "what a puppet thing life is," it reflects the theme summarized in which of the following statements?

15. accounting 102

Equipment is purchased for \$80,000. It has an 8 year useful life and a \$39000 residual value. Under the double-declining-balance method, what is the depreciation for year 3? a. 6,000 b. 48,000 c. 11,250 d. 8436 I answered C. The teacher said it's a. 6,000.

16. accounting

Post-closing trial balance What am I supposed to do when the balance is not equal? As in credits do not match debits. I follow the instructions in the book but no matter what it just does not match, even if i do all the debits on one side and all the

17. Pre-Algebra

While visiting a farm, you notice that there are only chickens and rabbits in the farmyard. You can't help but wonder how many of each animal there is on the yard, but when you ask Farmer Fred he refuses to give you a direct answer. (Some say he must have

18. physics

A uniformly charged insulating rod of length 14 cm is bent into the shape of a semicircle. if the rod has a total charge of -7.5 C. find the magnitude and direction of the electric field at the center of the semicircle. I'm not sure where to start or what

19. Math: Calculus - Vectors

A plane flies on a bearing of 120 degrees at a constant speed of 550 km/h. If the velocity of the wind is 50 km/h on a bearing 220 degrees, what is the velocity of the plane with respect to the ground? Textbook Answer: 543.5 km/h at a bearing of 125.2

20. science

What happens at the particle level when you put ice cubes in the glass of room-temperature lemonade?

21. the novel

In The Call of the Wild, the bond between Buck and Thornton is best explained by observing that

22. Physics

Two cars are approaching one another in the same lane of a highway. One has a speed of 30m/s, the other a speed of 20m/s when they are 96m apart. The drivers simultaneously apply brakes to avert a collision. Both cars lose speed at 6.0m/s^2. How long after

23. math

how can you determine whether a design has rotational symmetry? if a design has a rotational symmetry, how many can you find the angle of roation??

24. spanish sra mcguin

hi here is what I am working on: fill in blanks with these verbs: almorzar pensar preferir poder querer tener empezar can be used more than once Dana - Hola, Susana, habla Dana. Oye, mi familia da una fiesta este sabado para la mejor amiga de mi madre.

25. calculus

the base of a solid is a region in the first quadrant bounded by the x-axis, the y-axis, and the line y=1-x. if cross sections of the solid perpendicular to the x-axis are semicircles, what is the volume of the solid?

26. Shapes

I know this seems like a somewhat silly question, but what shape is a pizza slice? I know most of us are going to say "triangle." Is it a triangle? Can a triangle have a curved line in it or do all lines have to be straight? I know we might say curvalinear

27. spanish sra mcguin

hi here is what I am working on: fill in blanks with these verbs: almorzar pensar preferir poder querer tener empezar can be used more than once Dana - Hola, Susana, habla Dana. Oye, mi familia da una fiesta este sabado para la mejor amiga de mi madre.

28. HTML

Click on the link below labeled "Tags" and complete the "Basic HTML: Primer #2" lesson. You will need to create your HTML coding within a word processor. Refer back to the lesson if you have questions on this. Make sure that when you get to the last

29. chemistry

Classify the following properties of ozones as physical or chemical: 1.bluish color 2.pungent odor 3.reactive towards oxygen 4.decomposes to oxygen on exposure to ultraviolet light 5.it is a gas Is this correct? 1.chemical 2.physical 3.chemical 4.chemical

30. Frakenstein-ENGLISh

sorry once again...i know i've been bothering everyone about this topic. I have to do a research paper about basically anything related to science fiction. first i decided to do a research paper on mary shelley. but i didn't find it interesting. and since

31. Chemistry

Which of the following is the best definition of Hess' Law? A. Heat is always released by the decomposition of 1 mole of a compound into its constitute elements. B. The enthalpy of a process is the difference between the enthalpy of the products and the

32. Math _ Vectors

A plane flies on a bearing of 120 degrees at a constant speed of 550 km/h. If the velocity of the wind is 50 km/h on a bearing 220 degrees, what is the velocity of the plane with respect to the ground? Textbook Answer: 543.5 km/h at a bearing of 125.2

33. chemistry

Could you help me complete these equations. I can balance them after NaOH (aq) + HI (aq) ---> LiHCO3 (aq) + HI (aq) ---> HCl (aq) + NaHCO3 (aq) --> Na2CO3 (aq) + HBr (aq) --> HNO3 (aq) + KHCO3 (aq) --> HBr (aq) + NH3 (aq) ---> HNO3 (aq) + Ca(OH)2 (aq--->

34. physics

Find the speed at which Superman (mass=89.0 kg) must fly into a train (mass = 19564 kg) traveling at 65.0 km/hr to stop it. The system (train + Superman) must end up with zero momentum. With no external forces, Superman's initial momentum must be equal and

The current research project involves examining the photoreceptors of the fruit fly, Drosophila Melanogaster. Over the last 6 weeks, I have been spending about 2 hours a week working with a program called ImageJ and various slices of photoreceptor cells of

36. the novel

What does the word mimetic tell us about the difference between novels and most of the literature of the 1800s?

37. AED200

Random student locker searches without permission Explain the responsibilities you have as a teacher in the issue you chose. What are the students' rights? Do you have a responsibility to limit their rights? Identify the rights and responsibilities you

38. English

why did Mark Twain use humor in the book TOm Sawyer?

Can anyone please download the prep guide for the nystce exam for me? My computer isn't compatible and I need it a.s.a.p. Thanks in advance.

1.Why is an exporter that is to be paid in six months in a foreign currency worried about fluctuating foreign exchange rates? 2.Are there ways in which this exporter can protect itself? If so, what are they? 3.How does the credit or money market hedge

41. the novel

After the death of Curly in The Call of the Wild, Buck concludes that no fair play exists in his world and that he will never go down in a fight. The theme illustrated here is apparently derived from London's interpretation of

42. Chemistry

Can someone please tell me if I did this correctly? Calculate the molarity of the HCl from the volumes of acid and base and the molarity of the NaOH. Use the following equation: (molarity of acid)x(volume of acid)=(molarity of base)x(volume of added base)

43. Calc

A line tangent to y=(x^2)+1 at x=a, a>0, intersects the x-axis at point P. a) Write an expression for the area of the triangle formed by the tangent line, the x-axis, and the line x=a. b) For what value of 'a' is the area of the triangle a minimum? Justify

44. Pre-Algebra

This is about Reasoning Strategy, I really need help on this, I have a test tomorrow on it! Please help... Ok, here's what it says: 3a. What is the y-intercept of the trend line? (What do they mean???) 3b. Locate one other point on the trend line, then

45. geography

Ferdinand V:Isabella::Napoleon I:?

46. accounting

Payment Lag- The lag between purchase date and the date at which pay is due is known as term lag. The lag between the due date and the date on which the buyer actually pays is termed due lag,and lag between the purchase and actually payment dates is the

47. math

jack an joan painted 3 houses in 12 days.At that rate, how many houses can they paint in 28 days??

48. science

i grew in a cave, but im not alive. i began as water and minerals, but now i am solid. i grow upwards, but in never see the sky.what am i?

49. Guido KIRA odds and evens

KIRA did not have to add the odds and the evens. It was a trick question. Each difference is one. one times five = five

50. Chemistry

Calculate the molarity of the HCl from the volumes of acid and base and the molarity of the NaOH. Use the following equation: (molarity of acid)x(volume of acid)=(molarity of base)x(volume of added base) equivalance point=number of mL of base to an acid

51. arithmetic

There are 7 girls on a bus. each girl has 7 backpacks. In each backpack there are 7 big cats. For every big cat there are 7 little cats. Question: How many legs are there in the bus?

52. algebra

what is 1+1 equal

53. Approaches to Teaching Social Studies

What are the different approaches that can be used for teaching controversial versus non controversial subjects?

could you please check my work? thanks. For the reaction between reactants A and B below, if 4.925 moles of A is placed into a flask with excess B it is found that the amount of A remaining after 6.85 seconds is 2.737 moles. 2A (g) + B (g)-----> 3 C (g) a.

55. physics

There are two +q charges and two -q charges on the corners of a square of size a. Left upper corner= +q charge, right upper corner= -q charge, left lower corner= -q charge, and right lower corner= +q charge. Compute the net force on each charge. I know

56. P.ed

I need information on, if you have completed your degree from a university in Alabama, but decided to move to another state, what would you need to be able to teach in that state. Include everything you would need to teach in that state, degrees, exams,

57. Chemistry

How do cross linked branched polymers compare to cross linked linear polymers?

58. Law

I just need a little guidance on where to begin, can someone help me please. Do you agree that for police action to be "just," it must recognize the rights of individuals while at the same time hold them accountable to the social obligations defined by

59. MATH

X= 92]96]100]104]108 Y=23]24]25]26]27 WHAT IS THE VALUE OF Y WHEN X IS 68?? IF Y=X-19, WHAT IS THE VALUE OF X WHEN Y= 34

60. math

Please double check In a bottling company, a machine can fill a 2-liter (l) bottle in 0.5 second (s) and move the next bottle into place in 0.1 s. How many 2-l bottles can be filled by the machine in 2 h? Answer: 1.00 or 0.20 A circular coffee table has a

61. math

Double check please Write each of the following as a common fraction or mixed number. Write your answer in lowest term 28. 15.35 Answer: 1535 / 100 = 307/20 = 15 35/100 is 15 7/20 Complete each of the following statement, using the symbol < or > 5/16

62. Math

Please help, Locate one other point on the trend line. Then find the slope of the trend line. ...How do I do that?

63. geography

Stonehenge:England::Parthenon:?

64. spanish help

combine items below to create questions Tu/querer/estudiar/conmigo/en la biblioteca Tu quierres estudia conmigo en la biblioteca. Ustedes/poder/comprar/refrescos/para la fiesta I am confused on this one??????

65. Pre-Algebra

Andyis putting together alien toys called Zergs and Borgs for a display window in the toy shop. He has a box of body parts that contains 45 heads and 55 feet. One Zerg has 1 head and 3 feet. One Borg has 4 heads and 2 feet. How would I go about doing this?

66. accounting

Working capital Management Indicate how each of the following six different transactions Dynamic mattress might make would would affect I) cash and II)Networking capital A) Paying out a \$2 million cash dividend B) A customer paying a \$ 2500 bill resulting

67. Math

Please help me. Statistics: The following table gives the free throws attempted (FTA) and the free throws made (FTM) for the top five players in the NBA for a recent season. Calculate the free throw percentage for each player by writing the FTM over the

68. calculus

find the modulus and the argument of the following complex numbers: 15-4i and a-ai where a is greater than 0

I have a question about The Witch of Blackbird Pond. Why did Matthew Wood fail to sympathize with Kit's loss of her personal slave? I appreciate any good answer.

70. arithmetic

127/12-514/15

71. pre-calculus

solve for z writing the answer in polar form: #1 z=(3,115 degrees)*(4,290 degrees) #2 (8,50 degrees)* z=(6,172 degrees)

72. AP U.S. History

which of the following best describes the situation of freedmen in the decade following the Civil War? A)Each was given 40 acres of land and a mule by the Union government B)All were immediately granted political equality by the Emancipation Proclamation

73. algebra

(1/5)^(x-2)=125

74. pre algabra

how would i figure this out?? kaya has roses, lillies, tulips, dasies and poppies growing in her backyard. she wants to make a bouquet for her friend. how many combinations of types of flowers can kaya have in the bouquet is she uses: a. exactly 1 type of

75. agriculture science

1.)state the cautions that farmers should have with their poultry frams,especially with pests and diseases. 2.)list the names of some pests and pests diesases.

76. inequalities

hello, can you help me to solve this question? x^2+9>0 thank you''

and we had to round this was the question was to again calculate the number of moles in each of the following masses a)64.1 g of aluminum b)28.1 g of silicon c)0.255 g of sulfur d)850.5 g of zinc a) 64/27 = 2.4 mols b) 28.1g/28=1.0 mol c) 0.255/32=.0080

78. math

how can u determine whether a design has a reflectional symmetry??

79. Physics

Car A and B are passing each other in different lanes. Car A has an initial speed of 15m/s and is gaining speed at 1.5m/s^2. Car B has an initial speed of 20m/s and is gaining speed at 2.0m/s^2. Find when and where the cars will pass one another and their

80. math

let s= the sum of all even numbers from 2 to 10 {including 2 and 10} Let t= the sum of all odd numbers from 1 to 9 z{including 1 and 9.. find s-t

81. Math

Find the exact solution to 6x^2+1=-8x by using the Quadratic Formula. A)-4+-(sqrt10) B)-4+-(sqrt22)/6 C)-2+-2(sqrt10)/3 D)-4+-(sqrt10)/6 I chose C x=-b+-(sqrtb^2-4ac)/2a x=--8+-(sqrt-8^2-4(6)(1))/2(6) x=8+-(sqrt64-24)/12 x=8+-(sqrt40)/12 x= C

82. chemistry- DR BOB

and we had to round this was the question was to again calculate the number of moles in each of the following masses a)64.1 g of aluminum b)28.1 g of silicon c)0.255 g of sulfur d)850.5 g of zinc a) 64/27 = 2.4 mols b) 28.1g/28=1.0 mol c) 0.255/32=.0080

83. Math

Which describes the number and type of roots of the equation x^2-625=0? A)1 real root, 1 imaginary root B)2 real roots, 2 imaginary roots C)2 real roots D)4 real roots I went with A sqrt x^2= x (which would be the imaginary) and sqrt 625= 25 (the real)

84. physics

A generating station is producing 1.3*10^6 W of power that is to be sent to a small town located 7.0 km away. Each of the two wires that comprise the transmission line has a resistance per kilometer of length of 5.0*10^-2 /km. (a) Find the power lost in

85. CHEMISTRY ANYONE THAT CAN HELP!!!!!!!!!!!!!!!!!!!

and we had to round this was the question was to again calculate the number of moles in each of the following masses a)64.1 g of aluminum b)28.1 g of silicon c)0.255 g of sulfur d)850.5 g of zinc a) 64/27 = 2.4 mols b) 28.1g/28=1.0 mol c) 0.255/32=.0080

86. com 215 written communication

1) compare and contrast characteristics of nonverbal and verbal communication for different audiences such as: family member & friends in a relaxed situation. 2)Supervision and Instructors in a tense situation nonverbal and verbal communication

87. algerbra

how do i set up and whats the prosedure to solve 10 to the 7th power times 10 to the third power divided by 10 to the 4th power times ten to the negitive 9the power? please help you are doing mankind a favor.if i don't pass this i will be labeld the dumest

88. Algebra

What do the domain and range of a function compare to in a linear equation?

89. chemistry

Which of the following is NOT true about the thermodynamic standard state? A. A gas is in its standard state when its pressure is 1.00 atm and its temperature is 25C . B. An aqueous solution is in its standard state at a concentration of 1.00 M. C. A solid

90. geography

United Kingdom:Great Britain::Holland:?

91. history

hi... i need to know what the name of the native people of ecuador are called...and i also need a brief summary about them.. i need websites..and some information that u might know.. please help (urgent)...

92. Chemistry

HELP! we just started kinetics and i have no clue how to solve this problem. For the reaction between reactants A and B below, if 4.925 moles of A is placed into a flask with excess B it is found that the amount of A remaining after 6.85 seconds is 2.737

a system

94. geography

who is Napoleon I's wife?

95. calculus

Find the total distance traveled by the particle moving along a straight line with velocity v=sinpit for 0

96. spanish help

tu/pensar/mirar/la television/con tu amigos pensas mira la televison con tus amigos is this correct

97. drbob

theres a response for u on my previous question

98. acounting

Forecasting Payments. If a firm pays its bills with a 30-day delay, what fraction of its purchases will be paid for in the current quarter? In the following quarter? What if its payment delay is 60-days?

99. Math

Could someone check this over for me please. Arrange in order from smallest to largest 2.05, 25/10, 2.0513, 2.059, 251/100, 20515, 2.052, 2.051. Answer: 2.05, 2.051, 2.052, 2.059, 251/100, 2.0513, 2.0515, 25/10 45.6 – 8.75 Answer: 36.85 (Add)

100. math

Please Help Statistics: The following table gives the free throws attempted (FTA) and the free throws made (FTM) for the top five players in the NBA for a recent season. Calculate the free throw percentage for each player by writing the FTM over the FTA

101. Math

Please double check In a bottling company, a machine can fill a 2-liter (l) bottle in 0.5 second (s) and move the next bottle into place in 0.1 s. How many 2-l bottles can be filled by the machine in 2 h? Answer: 1.00 or 0.20 A circular coffee table has a

102. Math

Please help The following table gives the free throws attempted (FTA) and the free throws made (FTM) for the top five players in the NBA for a recent season. Calculate the free throw percentage for each player by writing the FTM over the FTA and converting

103. math

The following table gives the free throws attempted (FTA) and the free throws made (FTM) for the top five players in the NBA for a recent season. Calculate the free throw percentage for each player by writing the FTM over the FTA and converting this

The current research project involves examining the photoreceptors of the fruit fly, Drosophila Melanogaster. Over the last 6 weeks, I have been spending about 2 hours a week working with a program called ImageJ and various slices of photoreceptor cells of

105. math

The following table gives the free throws attempted (FTA) and the free throws made (FTM) for the top five players in the NBA for a recent season. Calculate the free throw percentage for each player by writing the FTM over the FTA and converting this

106. Managerial Economics

Supposed that a firm's daily output is Q = 1.5L^0.76 K^0.24 Q = Daily output L = number of workers K = number of machines used per day Price per output = \$10 If wages of a worker is \$30 a day, how many workers(L) per unit of output should the firm hire?

107. agriculture science

1.)state the cautions that farmers should have with their poultry frams,especially with pests and diseases. 2.)list the names of some pests and pests diesases.

108. math

For which m is the solution of the following sistem 0

109. iran language

what is "welcome to iran" in iranian language???

110. capital markets

I am Flora. I have a essay and I need to:provide a clear description of money markets, their origins and a brief summary of their developments..

111. capital markets

I am Flora. I have a essay and I need to:provide a clear description of money markets, their origins and a brief summary of their developments..

112. math

Are these answers correct 4.0171 Answer: 4 171/10,000 Arrange in order from smallest to largest 2.05, 25/10, 2.0513, 2.059, 251/100, 20515, 2.052, 2.051. Answer: 2.05, 2.051, 2.0513, 2.0515, 2.052, 2.059, 251/100, 25/10 45.6 – 8.75 Answer: 36.85 Add

113. Religion

what effect do religious pluralism and the interfaith movement have on the future of organized religion?

114. Literature

Can someone help me please? What is the significance of the title The Grapes of Wrath? I think it has to do with the hardships that the Joads have to go through to survive in the migrant worker fields. Am I anywhere near right? Thank you in advance for

115. physics.

Describe constructive and destructive interference in terms of the combining of crests and troughs and the reesulting amplitude.

116. human services

how do the purpose and functions of the board of directors in a human services organizations affect day-to day operations

117. Math

If g(x)= 3x-8, find g[g(-4)]. A)-68 B)4 C)-20 D)52 I got C 3x-8[3x-8(-4)] 3x-8+3x+32 thats all I have

118. Geography

Rhine River:Germany::Thamas River:?

119. History

What territory did Russia and Austria want control of?

120. Math

PAULA ,SIMON AND RANDY COLLECTED INSECTS FOR THEIR SCIENCE PROJECT. AT THE END OF THE FIRST WEEK PAULA AND RANDY TOGETHER HAD 89 INSECTS, RANDY AND SIMON TOGETHER HAD 85 INSECTS. HOW MANY DID EACH HAVE ALONE?

121. geography

Copenhagen:Denmark::?:Poland

122. geography

Baltic States:Estonia, Latvia and Lithuania::Scandinavia:?

123. geography

Alps:Switzerland::Pyrenees:?

124. english

What is wrong with this sentence "Patty potted Peter Pipers pickled peppers.

125. statistics

How do you get this? F(1,2), .542, p = .012 Thank you in advance.

126. EARTH SCINCE

THE JOVI QUANTITIESGEAN PLANETS CONTAINS LARGE QUANTITIES OF ICE BECAUSE IT WAS?

127. english

i had a parargrahp writen i want you to check if its right orno t.

128. MATH

IN HOW MANY WHOLE NUMBERS LESS THAN 100 DOES THE DIGIT 9 APPEAR AT LEAST ONCE?

129. MATH

JACK AND JOAN PAINTED 3 HOUSES IN 12 DAYS. AT THAT RATE, HOW MANY HOUSES CAN THEY PAINT IN 28 DAYS?

130. science

Why can't sound waves travel through empty space? I know it has something to do with vibrations.

131. Math

PAULA ,SIMON AND RANDY COLLECTED INSECTS FOR THEIR SCIENCE PROJECT. AT THE END OF THE FIRST WEEK PAULA AND RANDY TOGETHER HAD 89 INSECTS, RANDY AND SIMON TOGETHER HAD 80 INSECTS, PAULA AND SIMON HAD TOGETHER HAD 85. HOW MANY DID EACH HAVE ALONE?

132. French

How do you say the following sentences in French: - I have 2 brothers. - I have no sisters.

31/3-22/5

134. History

the word is "NDLAOHL" what is the word unscrambled?

135. French

Hello, does "partage" mean share in english.

136. Chem Urgent!

What is the number of grams for 1 mol lead?

137. inequality

What is the vertical asymptotic line of Y=(x^3-3x^2)/(9-x^2). thank you

and we had to round this was the question

139. Library Science

What are 8 different types of information commonly found on a card catalogue?

140. Physics

How do you know if a quadratic is a perfect square?

141. science

what are the subunits that make up nucleic acids?