# Questions Asked onJanuary 4, 2011

1. ## Math/Trig

Which of the following is coterminal with ? A)-237 B)33 C)-33 D)597

2. ## Chemistry

Explain, in terms of electronegativity, why an H-F bond is expected to be more polar than an H-I bond.

3. ## English

Like adjectives, adverbs with one syllable form the ____ by adding -er to the positive. a. superlative b. attributive c. comparative d. appositive

4. ## Math

My son's math homework asks him to find each product by factoring the tens. 6 x 2, 6 x 20 and 60 x 20. There is no explaination in the book..can you help?

5. ## Trigonometry

Find the area of a sector, given a central angle of 240degrees and a radius of 15 cm. Round your answer to the nearest tenth.

6. ## history

How did Mikhail Gorbachev’s policies contribute to the end of the Cold War?

7. ## physical

Suppose an unknown substance has a melting temperature of 1,200 degrees Celsius and a density of 16.7 g/cm3. However, the different individual atoms that make up the element have very different melting temperatures and densities. Which is the unknown

8. ## trigonometry

An aeroplane at an altitude of 200m observes the angles of depression of opposite points on the two banks of a river to be 45 degree and 60 degree. Find in metres, the width of river.

9. ## math

Suppose that a ball is drawn at random from the box (a), its color is recorded, and then the ball is put back in the box. Draw a tree diagram for this experiment and find the probability that the two balls are of different colors.

10. ## Math

you use a rectangular piece of cardboard 20 in by 30 to construct a box. you square the sides x in. from each corner of the piece of cardboard and then fold up the sides to form the bottom. A. write a function A to represent the area of the base of the box

11. ## Stuctures of the Earth

If you measure one thing, its gives you clues about something else. Give an example. I am not seeming to understand this question. It kind of tends to relate in with theories and such that scientists have made by doing investigations which have provided

12. ## math

the third term of a geometric sequence is t3= -75 and the sixth term is t6= 9375. determine the first term and the common ratio

13. ## physics

Several people are riding in a hot-air balloon. The combined mass of the people and balloon is 310 kg. The balloon is motionless in the air, because the downward-acting weight of the people and balloon is balanced by an upward-acting “buoyant” force.

14. ## chemistry

how many ml of water at 10 degrees celsius must be added to 75 ml of water at 35 degrees celsius to obtain a final temperature of 19 degrees celsius?

15. ## math

1100 to the nearest tenth

16. ## math

wei made two square pyramids and glued the congruent bases together, how many faces does here figure have?

Hatchery fish populations often have less genetic biodiversity than wild populations. How much lowered biodiversity affect a fish population's ability to adapt to environmental disasters such as the pollution disaster described in this simulation(factory

18. ## Statistics

Suppose a study found a correlation coefficient r = -0.61 between the gender of a worker and their income. What can you conclude?

19. ## math

the perimeter of a rectangle is 22 meters, and the perimeter of the triangle is 12 meters. find the dimensions of the rectangle?

20. ## math

what do they call bowling in hawaii

21. ## science-chemistry

A piece of metallic iron (10 moles) was dissolved in concentrated hydrochloric acid. The reaction formed hydrogen gas and iron chloride. How many moles of iron (II) chloride were formed? Don't forget the units.

22. ## algebra

A block of ice loses one third of its weight every hour. After 2 hours, the block weighs 40 pounds. How much did the block weigh to begin with?

23. ## chemistry

if 1.5g of salicylic acid is heated with an excess of acetic anhydride, what is the theoretical yield of acetylsalicylic acid?

24. ## math

If square ABCD has a larger area than rectangle EFGH, does it follow that ABCD must have a perimeter larger than that of EFGH? Why or why not? I believe it will have a larger perimeter that the other, is this correct?

25. ## math

the binary system is used for computer programming. a binary number consists of a string of digits that are either 0s or 1s a. if a string of binary code is 5 digits long, how many binary numbers are possible if the first digit is a 1? b. how many

26. ## math

A contestant has to arrange the events that correspond to A, B, C and D. One contestant is positive that event D follows directly after event B, but doesn't not know about the others. How many diffrent ways could this e the letters A,B,C and D.? list the

27. ## calculus

find the derivatives 1. y=sin^3(2x)(cos2x)

28. ## calculus

find the derivatives 1. y=sin^3(2x)(cos2x)

29. ## calculus

derivatives: 2. cos teta/ 1+sin^2

30. ## calculus

derivatives: 3. y= cot^3(2/x) 4. y= csc^5 (1-t+3t^2) 5. y=sec(5x)/tan3x

31. ## math

the bus staions in trawley and fenton are 220 miles apart. a bus left at trawly for at 9;00 am traveling at 40 miles per hour .one hour later, an express bus left left fenton along the same road at 50 miles per hour. at what time did the buses pass each

32. ## mat 116

The River View Bakery is making peanut butter cookies and loaves of quick bread. The preparation and baking times for each are given in the table below. Cookies (per batch) Bread (per loaf) Preparation 20 min 10 min Baking 10 min 30 min For these two items

33. ## Math/Triggg

Determine sinx tanx-sinx=0 for 0≤ x < 360°.

34. ## science

In the equation: Fe(NO©ý)©ý (aq) + 3KSCN (aq) ¡æFeSCN©ý (aq) + 3KNO©ý (aq) Why do two aqueous solutions form? What is this calle? Is there a seconday reaction?

A landslide may be caused when friction is ______ by moisture

If the fish from a particular stream have become genetically adapted to their home stream over many generations, what might happen if their fertilized eggs are used to restock a different stream that has become depleted of fish? Note-A fertilized egg means

37. ## Physics

A motorboat heads due east at 8.5 m/s across a river that flows to the south at a speed of 2.5 m/s. a. What is the velocity of the boat relative to a stationary observer on the shore? B. If the river is 1360 m wide, how long does it take the boat to cross

38. ## math

1. A die is tossed 10 times and the number of sixes rolled is recorded. The number of sixes rolled will follow what type of distribution? a. poison b. binomial c. geometric d. normal

39. ## Plane Trigonometry

A compact disk is 12 cm in diameter & rotates at 100 rpm when being played. The hole in the center is 1.5 cm in diameter. Find the speed in cm/min of a point on the disk & the speed of a point on the inner edge.

40. ## Structure of the Earth

Explain Earth's layers by comparing Earth to a familiar object such as an avocado. How are the layers similar? How are they different? I don't really get this question...All I know is that they both have different layers consisting of different mix of

41. ## c.r.t physics

You are driving south on a highway at 25 m/s (approximately 55 mi/h) in a snow storm. When you last stopped, you noticed that the snow was coming down vertically, but it is passing the windows of the moving car at an angle of 30 degrees to the horizontal.

42. ## english

Pronouns used as subjects or subject complements are in the nominative case. True or False

43. ## English

Identify the word in bold type. This car was fixed by the woman WHOSE parents used to live in New York. demonstrative pronoun indefinite pronoun interrogative pronoun relative pronoun not a pronoun

44. ## Algebra 1

Mars has a mass of 6.5 x 10 to the power of 23 kg and the sun has a mass of 1.99 x 10 to the power of30 kg. How many orders of magnitude greater than Mars’s mass is the sun’s mass

45. ## Math

30 > t + 45 is it t < -15?

46. ## Trig, Math

State the amplitude, period, phase shift, and vertical shift of f(x)=2cos(1/2x-pi/6)-1/3

47. ## science

the temperature at which water condenses out of air

48. ## Math/Trig

State the amplitude, period, phase shift, and vertical shift of f(x)=-1/4sin(6x+2pi)+9

49. ## English 1

Underline the correct pronoun of each pair in parentheses. 1. Women (who, whom) raise families do as much work at home as at their jobs. Whom 2. In North America society, it is still mainly women (who, whom) cook dinner, clean the house, check the

50. ## Math/Trig

Write the sine function with an amplitude of 1/4, a period of 3pi, phase shift of pi4 to the right, and a vertical shift of 4 units down.

51. ## algebra

Write an equivalent expression for 6x+8y

52. ## physics

A movable piston having a mass of 8.00 kg and a cross-sectional area of 5.00 cm2 traps 0.200 moles of an ideal gas in a vertical cylinder. If the piston slides without friction in the cylinder, how much work is done on the gas when its temperature is

53. ## Math

Can you explain how to do this? 18 < 20 + w

54. ## English

Thank you very much for your corrections. Here are some more sentences I'd like you to check. 1) Elizabeth encouraged the (?) piracy because she took a share of the profits. 2) Sea captains captured the Spanish ships which traded precious metal(s), tobacco

|3n + 5| = 7

56. ## Math/Trig

If the population of rabbits in a certain area is modeled by the function, r=10,000cos(pi/12t)+35,000 where t is the time in months, approximately how many rabbits will there be in August (January is equal to t = 1)?

57. ## xmgt216

should aperson be permitted to place a value on human life? should a company? should the goverment? if not how would dicisions be made about weather to market certain products that might be risky for some, but helpful to others, and how much should those

58. ## fraction x whole number

the problem is 7/10 x 30 = how do you convert and get the answer

60. ## Math/Trig

Find two exact values of sin(cos­­ˉ¹ √5/6)

99. ## geometry

ABCD is a parallelogram. solve for x and find the lengths of BC=16+2x and AD=10+8x

100. ## math

find the radius of each circle with the given measurement 20. C= 18pie in

101. ## MATH

THERE IS 20 POTATOES IN A 5LB BAG THE CAFE USES 2 POTATOES PER ORDER THEY CHARGE .95 FOR AN ORDER HOW MUCH MONEY DOES THE CAFE RECEIVE ON THAT DAY THEY USE 400 POUNDS OF POTATOES

102. ## Chemistry

If 3.0 moles of HCl are consumed in the reaction below, how many moles of FeCl3 are produced? 6HCl + Fe2O3 --> 2FeCl3 + 3H2O

103. ## Physics Honnors

A 15 kg block of wood is sitting on a 1.5 meter high shelf. Calculate its gravitational potential energy

104. ## Writing

When my son is writing his spelling words he is having trouble with his lowercase B's and D's. He knows how to verbally spell words but when he writes them, he gets his b's and d's backwards. Do you have an easy way to explain this to him?

105. ## calculus

Find the equation of the line which is parallel to the line 5x +4y=18 and makes an intercept of 2 units on the x-axis

107. ## physics

Diego pulls a 4.5 kg sled across level snow with a force, F, of 230 N on a rope that is 35.0° above the horizontal. If the sled moves a distance of 63.3 m, how much work does Diego do?

108. ## Physics

I need to find the mass: velocity=30 km/h KE=10^6 J then using that I have to find the KE for: v=60 km/h v=90 km/h

109. ## physics

the drawing below shows three vectors acting on a particle. If the acceleration of the particle is zero. Find the magnitude and the angle respect to the east of the third vector.

110. ## math

Express each of the following as a product a. 6! b. 7C2

111. ## math

express each of the following expressions in the form nPr or in the form nCr a. 27x26x25x24/4x3x2x1 b. 30x29x28x27x26

112. ## science

How much work is done on a 30 N rock that is lifted 1.5 m off the ground? show work.

113. ## social studies

medieval farmers used plows to break up the soil in the humid oceanic climate. they also rotated their crops. what does this tell you about the climate and soil in this zone?

114. ## social studies

in the subtropical dry summer climate zone medieval farmers were able to grow a host of crops such as wheat, olive trees, an wine grapes. what does this tell you about the climate and soil in this zone?

115. ## ipc

if the velocity of an object is doubled, its kinetic energy is ___.

117. ## Math

Write an inequailty for the sentence and solve it. 1. The sum of a number w and 3 is less than or equal to ten

118. ## Social Studies

What Groups benefited/didn't benefit from the Economy in the 1920's. I tried wikipedia and various websites all day,but no help. Can anyone answer this question without giving me links? I would really appreciate it!

119. ## math

What is a function rule for the perimeter P of a building with a rectangular base if the width w is two times the length l?

120. ## Philosophy

Is it possible to reconcile rationalism and empiricism? If so, how? If not, why? Thanks for your help a head of time

121. ## algrebra

9 a . 12x -4x =104 9b 8a+3a+4a=12 9c. 7m -3m-6 = 30 9d. 2\3y + 5\3y-8=6

122. ## algebra

10 a. 7m + 36 =11m b. 2x+ 4=10x-4 c.11w-8=22-w d.6a - 12-a = 9a +53+a

126. ## Education problem

what do i need to know before going to the university from high school for dentistry (which book is helpful for studying dentistry)

127. ## Maths

'a' and 'b'are integers and (a, b) = 2. Solve the following two equations: (a+b)^2 = 25a 18(a^4) + (b^4) = 41a(b^2) Can't get it, help please?

128. ## math

what is the simplest form of 21 over 1600?

5/12=10/x-1

133. ## Algebra 1

-3x + 6 < 21 I need help in solving this problem step by step. Can anyone help, please? thank you very much.

213. ## English

We're studying subject after the verb. 1.(Has, Have) your neighbors moved to Phoenix yet? 2.There (is,are) fifty states in the United States. 3.(Is, Are) the loaves of bread in the oven? 4.(was, Were) your parents born in Sweden? 5.(Has, Have) Marie and

214. ## algebra

write a linear equation to model the situation. Use unit analysis to check your model. You borrow $40 from your sister. To repay the loan, you pay her$5 a week.

215. ## math

If a rectangle has a length of 4.5 inches and a width of 3 inches. How would the area change if you doubled both dimensions?

216. ## Humanities

The internet has changed the way many Americans consume information due to the way the internet is set up for users

217. ## algebra

6.67x10-11 nm2/kg2 write the gravitational constant using positive exponents

218. ## Physics

A 11 kg object and a 19 kg object are connected by a massless compressed spring and rest on a frictionless table. After the spring is released, the object with the smaller mass has a velocity of 12 m/s to the left. What is the velocity of the object with

219. ## algebra

4x+9y=52 x=35-5y

ms. sue can you help me with another problem? whatnis the median of the following number? 24,99,101,93,14,29? by the way can you please!check my last problem that you posted to me an hour ago here is my answer is 20 the median

221. ## practical nurse

in a 150 words state how you can contribute quality service to health care

solve -10

x + 6 > 7

224. ## geometry

a zip line consists of a pulley attached to a cable that is strung at an angle between two objects. in the zip line at the right one end of the cable is attached to a tree. the other end is attached to a post parallel to the tree. what is the measure of

225. ## math

Jenifer bought 2 notebooks and a pencil.One notebook cost twice as much as the other.The pencil cost $.30.She spent$ 6.75.How much did each note book cost?

226. ## statistics

The average age of evening students at a local college has been 21. A sample of 19 students was selected in order to determine whether the average age of students had increased. The average age of the students in the sample was 23 with a standard deviation

227. ## statistics

Suppose X is N(4,2) and Y is N(10,1). what kind of distribution is 2X+Y? What is its mean and standard deviation if X and Y are independent?

228. ## Math

What is the standard form of y+2=1/2(x-4)? a. x=2y=0 b. x-2y=8 c. 2x-y=10 d. -3x+2y=0

229. ## english

the wrinkled surface of a tiny lake Is it a metaphor or personification?

230. ## Statistics

How large a smaple from a N(80,20) population is needed so that the sampling distribution of the mean has a standard deviation of 1?

231. ## math

what is 108 oz=blank lb

232. ## Statistics

In a study to determine if you can predict stock price based on P-E ratio, what is the response variable and what is the explanatory variable? How would you label the X and Y axes in a scatterplot of the data?

233. ## L.A

Is this word use correctly in the sentence? - Migration Paul like to watch the migration patterns of his new fish. ( I think it is correct because migration is a change in location depending on the season and the fish might be changing places depending on

234. ## Statistics

How large a sample from N(80,20) population is needed so that the sampling distribution of the mean has a standard deviation of 1?

2 + m < 2

236. ## chemistry

A gaseous mixture at a constant temperature contains O2, CO2 and He. List the three gases in order of increasing average molecular speed. THANKS.

237. ## math

2/5Q is less than or equal to -18 i am really stuck and i am not surehow to figure it out!

238. ## algebra

Write an equivalent expression for 6x+8y

239. ## Physics

Two 2.00kg balls are attached to the ends of a thin rod length 50.0cm and negligible mass. The rod is free to rotate about a horizontal axis at the center, without friction. With the rod horizontal, a 50.0 gram glob of putty drops onto one of the balls,

240. ## physics

Pulling up on a rope, you lift a 4.05-{\rm kg} bucket of water from a well with an acceleration of 2.20 m/s^2. What is the tension in the rope?

260. ## English 1

Underline the correct pronoun of each pair in parentheses. 1. Women (who, whom) raise families do as much work at home as at their jobs. Whom 2. In North America society, it is still mainly women (who, whom) cook dinner, clean the house, check the

261. ## English 1

1. Many so-called Founding Fathers are famous one or two of (his, his or her, their) accomplishments, but anyone who knows (his, his or her, their) history knows that Franklin is known for many things, including (his, her, his or her, their) inventions.