# Questions Asked onMarch 23, 2011

1. ## Spanish

Give the correct form of the appropriate verb, saber or conocer, which would be used in writing the following sentences in Spanish. 12. C Maria knew everyone. 13. S Because he had already seen the movie, he knew what happened? 14. S The student knows the

2. ## Pre Algebra

Suppose you have an after school baby sitting service. You charge a flat fee of $10 per week plus$3 per hour. The equation y = 3x + 10 represents your earnings per week for one child. Describe the y intercept. Answer: The y intercept is (0,10) but I'm

3. ## physics

A force of 80.0 N is required to pull a 25.0 kg wooden toy boat at a constant velocity across a smooth glass surface on Earth. What force would be required to pull the same wooden toy boat across the same glass surface on the planet Jupiter?

4. ## AP Chemistry

what si the procedure to make a 0.10m solution of Potassium Hydroxide during a class lab?

5. ## Math

1/(b+2)+1/(b+2)=3/(b+1)

6. ## MATH

A local politician claims that 1 in 5 automobile accidents involve a teenage driver. He is advocating increasing the age at which teenagers can drive alone. Over a 2 month period, there are 67 accidents in your city, and only 9 of them involve a teenage

7. ## Calculus

A 24 foot ladder is leaning against a building. Let x be the distance between the bottom of the ladder and the building and let theta be the angle between the ladder and the ground. a)Express theta as a function of x. cos theta = x/24 theta = arccos(x/24)

8. ## Trigonometry

rewrite the expression in terms of the first power of cosine. cos^3(x)sin^4(x)

9. ## Chemistry

When 2.6 ×103 g of CaCO3 are heated, the actual yield of CaO is 1.06 ×103 g. What is the percent yield? Answer in units of %.

10. ## Chemistry

Quicklime (CaO) can be prepared by roasting limestone (CaCO3) according to the reaction CaCO3(s)  −!CaO(s) + CO2(g) . When 2.6 ×10^3 g of CaCO3 are heated, the actual yield of CaO is 1.06 ×10^3 g. What is the percent yield? Answer in units of %.

11. ## Chemistry

The half-life of the first order reaction, A to products, is 53.2 s. What was the original concentration, (A)0 in moles per liter, if after 1.8 minutes, the concentration of A is 0.0783 moles per liter? Not sure whether to use integrated rate law or half

The loudness of sound can be measured in decibels. Do you think loudness is a vector or not? Can you explain why or why not.

13. ## Physics

When a stone is thrown into the air it's surface will be in contact with the surrounding air. Analyse the stresses existing between the stone and the surrounding air.

14. ## Physics

When a stone is thrown into the air it's surface will be in contact with the surrounding air. Analyse the stresses existing between the stone and the surrounding air.

15. ## geometry

A tower casts a shadow of 64 feet. A 6-foot tall pole near the tower casta a shadow 8 feet long. How tall is the tower.

16. ## chemistry

2.00 L of NO(g) at 1.00 atm and 25°C is reacted with 1.00 L of H2(g) at 2.00 atm and 25°C according to the following unbalanced equation. NO(g) + H2(g) ® N2(g) + H2O(g) Which, if either, is the limiting reactant?

17. ## chemistry

4.70 g of sodium bicarbonate (NaHCO3)is dissolved in 500 mL H2O. What is the pH of this solution? Assume constant volume.

18. ## Chemistry

An excess of aqueous AgNO3 reacts with 24.5 mL of 5 M K2CrO4(aq) to form a precipitate. What is the precipitate? Answer: Ag2CrO4 What mass of precipitate is formed? Answer in units of g.

19. ## Engllish Grammar

Help me to identify the sentence structure of this sentence. "Holmes is called in to help solve a mysterious problem"

20. ## Statistics and Probability

A research manager at Coca-Cola claims that the true proportion, p, of cola drinkers that prefer Coca-Cola over Pepsi is greater than 0.50. In a consumer taste test, 100 randomly selected people were given blind samples of Coca-Cola and Pepsi. 58 of these

21. ## life orientation

making responsible choice

22. ## english

HELP!!!!!!! i need a primary and secondary source about Maria Lock.

23. ## math

Set up the general equation from the given statement: m is proportional to the square of n and inversely proportional to both y and x.

24. ## History

In 1968 Democratic Convention in Chicago. What were the protestors so unhappy about?

25. ## US History

Question 1 (Multiple Choice Worth 1 points) Around the turn of the century, African Americans moving to cities in the North experienced substantially less racism than did African Americans in the South. more opportunities to become skilled workers than

26. ## Maths

determine if this is a function? y= x show working method please

27. ## Math

A boat in calm seas travels 19 km east and 32 km south. Find the distance and direction of the trip, relative to the south. What is the distance? What is the direction? I'm confused about how to solve this problem. Could someone show me the steps?

28. ## math

A geologist at point A measures the distance and angle of elevation to two columns of the Glen Rose formation in Texas. If the distance AS=796 ft and the distance AN=850 ft, compute the difference in the heights of the two columns to the nearest foot. What

29. ## AP United States History

Instructions: Use the following documents (most) and your knowledge of the period to answer the question. Question: Evaluate the following statement: "By the time of Abraham Lincoln's election in November of 1860, there was significant support in the North

30. ## Physics

How many calories are needed to change 1 gram of 100 degrees Celsius boiling water to 100 degrees Celsius steam?

31. ## math

how do you write 22th march 2011 in 5 letters without using numbers

32. ## English - Native speakers

Thank you for all your help till now! Another questions: Can you please paraphrase the following sentence because I just don't get the meaning of it: In the same interview, she cited her lifelong acquaintance with fear as the reason for her relative

33. ## Science

Identify the parts of the body in which mitosis occurs

34. ## chemistry

What quantity of solid compound? 300ml of 4% (w/v) ammonium chloride.

35. ## chemistry

What quantity of solid compound? 300ml of 4% (w/v) ammonium chloride.

36. ## programming

How to integrate / combine two different programs together ??? :/

69. ## English

but are the any errors for pronoun-anttecedent agreement in paragraph 2 for Swimming Strokes by Lee Carroll

70. ## Physics

Two cars crash into each other at an intersection on a very icy road. One 3,000 lb car is traveling 45 mph NW. The other, weighing 2,000 lb, is traveling 30 mph E. After the collision, their bumpers lock together. What is the velocity of the wreck as it

71. ## history

What defense strategy was developed by the late 1940s because the US lacked sufficient troops to confront the Soviet Army in Eastern Europe? A) atomic detente B) nuclear deterrence C) a combined NATO army D) French and German rearmament

72. ## English

Swimming Strokes by Lee Carroll Paragraph 4: One of the most easiest strokes for people who are just learning to swim are the backstroke because the swimmer does not put their faces in the water. Your nose and mouth stay above the water, and they can

73. ## English

So in paragraph 2 in Swimming Strokes by Lee Carroll there is only one error in pronoun-antecedent agreement that begins with To me...getting the rhythm of your breathing down

74. ## English

So in paragraph 2 in Swimming Strokes by Lee Carroll there is only one error in pronoun-antecedent agreement that begins with To me...getting the rhythm of your breathing down Your

75. ## English Question [Dante's Inferno]

I've just got a couple questions on the book, what are the two parts of the'' Divine Comedy?'' I've got Cantos, but I still need the other one and I can't fidn it in the paper I'm reading off of. Thanks -Allyson

76. ## English

Swimming Strokes by Lee Carroll Paragraph 4: One of the most easiest strokes for people who are just learning to swim are the backstroke because the swimmer does not put their faces in the water. Your nose and mouth stay above the water, and they can

77. ## English

Identify any improper verbal usage in each sentence. Each sentence has an error. Write the correct form of the verb. We appreciate you not smoking near the building entrance.

78. ## English

So in paragraph 2 in Swimming Strokes by Lee Carroll there is only one error in pronoun-antecedent agreement such as getting the rhythm of your breathing down

How do I say a ham sandwich or a cheese sandwich? For cheese sandwich is it el sandwich de queso? For ham sanwich is is el sandwich de hamon? I'm not sure how to spell ham

80. ## Calculus - evaluating integrals

I'm really having trouble with this current topic that we're learning. Any explanations are greatly appreciated. Evaluate the integrals: 1.) ∫ (2-2cos^2x) dx 2.) ∫ cot3x dx 3.) ∫ ((e^(sqrt x) / (sqrt x) dx))

81. ## English

I have to compare and constrast the funeral orations of Mark Antony and Marcus Brutus. What I need is a thesis statement for this paper and everything I come up with sounds lame. I'm not getting the message across. Could you help me?

82. ## Pre Calculus

Verify the identity: cos x + sin x tan x = sec x.

83. ## General knowlegde

How to write 23th march 2011 in 5 letter without using number

84. ## English

I have to compare and constrast the funeral orations of Mark Antony and Marcus Brutus. What I need is a thesis statement for this paper and everything I come up with sounds lame. I'm not getting the message across. Could you help me?

85. ## math

what is the area of circle with the diameter of 15 feet, rounded to the nearest whole number?

86. ## algbra

Evaluate each of the functions below at x = 1, 2, 4, 8, and 16. Plot the graph of each function. Classify each as linear, quadratic, polynomial, exponential, or logarithmic, and explain the reasons for your classifications. Compare how quickly each

87. ## history

many scientists who helped develop the atomic bomb for the United States A.were hired by the joint authority of the U.S. England and the Soviet Union B.made it known that they felt the project should not be kept secret C. had escaped from Fascist and Nazi

88. ## Math

Rchel has 14 red, 9 blue, and one yellow towel. In haw many ways can the towels be arranged if the towels of the same colour must be side by side?

89. ## chemistry

is air heavier than carbon dioxide

90. ## IT/210

Assignment: Chapter 5 Programming Problems · Complete Programming Problems 1 and 2. · Provide the analysis, pseudocode and test cases using the template submitted in Week 6 only (no diagrams are required). Chapter 5 Programming Problem Maximum Points

91. ## History

What defense strategy was developed by the late 1940s because the US lacked sufficient troops to confront the Soviet Army in Eastern Europe? I think that the answer might be= B) nuclear deterrence, is this correct? A) atomic detente B) nuclear deterrence

92. ## Music

Can you please check my answers. 1. A lyrical movement or piece for solo voice with instrumental accompaniment is called a/an A. ostinato. B. aria. C. operetta. D. chorus. 2. What is the difference between an oratorio and an opera? A. An opera is staged

93. ## English

After writing a paragraph about a movie how would you put three comparative and three superlatives?

94. ## Physics

A ball is attached to one end of a wire, the other end being fastened to the ceiling. The wire is held horizontal, and the ball is released from rest (see the drawing). It swings downward and strikes a block initially at rest on a horizontal frictionless

95. ## maths

height=6 feet length=5 feet breadth=4 feet what is the volume of the container in liters?

96. ## For Lia - question from this morning

I took some time to work out your rather "nasty" Calculus question. Take a look at it and see if it matches your expected result. http://www.jiskha.com/display.cgi?id=1300878253

97. ## science

julie carried out a chemical reaction using magnesium and an acid the products of the reaction were magnesium chloride and hydrogen. julie collected a test tube of the hydrogen. describe what she should do to show that it was hydrogen.

98. ## science

julie carried out a chemical reaction using magnesium and an acid the products of the reaction were magnesium chloride and hydrogen. julie collected a test tube of the hydrogen. describe what she should do to show that it was hydrogen.

99. ## science

julie carried out a chemical reaction using magnesium and an acid the products of the reaction were magnesium chloride and hydrogen. julie collected a test tube of the hydrogen. describe what she should do to show that it was hydrogen.

100. ## WRITING SKILLS PART 1

Which of the following topics would lend itself only to a formal style of writing? A. Why Living in the Country Is Better Than Living in the City B. How I Lost 10 Pounds C. Folk Songs I Have Sung D. Psychological Effects of Nuclear Weapons

101. ## math

If you add 2 1/2 plus 3 yards and 6 inches and 6 1/3 yards. How many yards do you have?

102. ## math

If you add: 2 1/2 plus 3 yards and 6 inches and 6 1/3 yards. How many yards do you have?

103. ## Calculus

Find the limit lim as x approaches (pi/2) e^(tanx) I have the answer to be zero: t = tanx lim as t approaches negative infi e^t = 0 Why is tan (pi/2) approaching negative infinity is my question?

104. ## maths

height=6 feet length=5 feet breadth=4 feet volume of the container=120 cubic feet how do you convert it into litres?

105. ## calculus

Let q(x)=(x^4)(e^-x). Calculate q'(x). Use q'(x) to determine whether q(5)q(6) (do not use a calculator). Explain your reasoning.

106. ## calculus

It is estimated that an annual advertising revenue received by a certain newspaper will be R(x)=0.5x^2+3x+160 thousand dollars when its circulation is x thousand. The circulation of the paper is currently 10,000 and is increasing at a rate of 2,000 per

107. ## science

as a satellite goes round the earth the earth turns on its axis. some satellities are always above the same place on the earths surface. how many hours do these satellities take to complete one orbit.

108. ## Math

A fence is to be built to enclose a rectangular area of 200 square feet. The fence along three sides is to be made of material that costs 3 dollars per foot, and the material for the fourth side costs 13 dollars per foot. Find the length L and the width W

109. ## PROBABILITY

There are 100 patients in a hospital with a certain disease. Of these, 10 are selected to undergo a drug treatment that increases the percentage cured rate from 50 percent to 75 percent. What is the probability that the patient received a drug treatment if

110. ## math

what's the 10%of 150,000.

111. ## Pre Calculus

Find the measure of the central angle, in radians, given the area of the sector as 22.6 cm2 and a radius equal to 3.7 cm. Round your answer to the nearest tenth.

112. ## physics

A clothes dryer is spinning at 75 rpm. A student opens its door and it comes to rest after rotating through four revolutions. Assume constant deceleration. What was the magnitude of the dryer's angular deceleration?

113. ## math

in triangle abc angle b is 5x angle a and c is 16 degree less than 4 times angle a the size of angle a b c in decimal is

114. ## math

A cross section of a hollow circular pipe shows that its inner diameter is 2 1/10 inches and that the pipe is 3/5 inch thick. What is its outside diameter?

115. ## Chem

Determine the maximum g of Ba3(PO4)2 that can be formed from your mass of Na3PO4 . 12H2O

116. ## physics

A clothes dryer is spinning at 75 rpm. A student opens its door and it comes to rest after rotating through four revolutions. Assume constant deceleration. What was the magnitude of the dryer's angular deceleration?

asked by need help as soon as possible
117. ## chemistry

The redox reaction: O3SOOSO3^2− + Cr^3+ -> HSO4^− + Cr2O7^2− is carried out in aqueous acidic solution. Which elements are undergoing changes in oxidation state? I thought it would be S and Cr. For the balanced equation, I got 3O3SOOSO3+Cr^3+ + 13H^+

118. ## Math

Can you please check my work since my professor wont. Thanks 50% of 45 solution=90 Predict the height of a woman who's humerus is 40 cm long using H(x)=2.75x+71.48 solution= 181.48cm Trains A and B are traveling in the same direction on parallel tracks.

119. ## algebra 2

Use the function to answer the question. h(x) = 4|x| 3 What is the value of h(6)? (Points : 4) 27 21 21 27

120. ## Discrete Math

Use mathematical induction to prove the truth of each of the following assertions for all n ≥1. 5^2n – 2^5n is divisible by 7 If n = 1, then 5^2(1) - 2^5(1) = -7, which is divisible by 7. For the inductive case, assume k ≥ 1, and the result is true

121. ## English

I had to write a brief review on a movie and needed five adverbs and five adjectives and three superlatives and three comparatives here is what I wrote.The supporting character I was most impressed with was Frenchie. She did a terrific job, both in her

122. ## geometry

A circle of diameter 2 inches has its center at the center of a square with 2-inch sides. Find the area of the region that is inside the square and outside the circle.

123. ## science

john has a bike when john gets on the bike, the force on each tyre increases. what happens to the area of tyre in contact with the road?

124. ## MATH

WHAT IS THE TOTAL LENGTH OF 32 PIECES OF WOOD , IF EACH PIECE IS 2 3/16 INCHES LONG?

125. ## maths

all the angles in order

126. ## english vocabulary spelling

the_____ was a conflagration,causing serveral buildings great damage

127. ## statistics

Indicate whether the given statement could apply to a data set consisting of 1,000 values that are all different. a. The 29th percentile is greater than the 30th percentile. b. The median is greater than the first quartile. c. The third quartile is greater

128. ## physics

a boy who can generate 500 w runs up a flight of stairs in 5.0 s.how high are the stairs if the boy has a mass of 62 kg.

129. ## chemistry

calculate the enthalpy of formation, per mole, of sucrose, C12H2211O(s). C12H22O11(s) + 12O2(g) --> 12CO2(g) +11H2O(l) deltaH=-5.65*10^3 kJ

130. ## chemistry

calculate the enthalpy of formation, per mole, of sucrose, C12H2211O(s). C12H22O11(s) + 12O2(g) --> 12CO2(g) +11H2O(l) deltaH=-5.65*10^3 kJ

131. ## History

Does anyone know how to create a timeline tracking the major themes/paradigm shifts in American History. I am not sure what the format for a Timeline. Tammy

132. ## Chemistry

A penny has a mass of 2.5 g and the moon has a mass of 7.35*10^22kg. What is the mass of 1 mole of pennies? How many moles of pennies have a mass equal to the mass of the moon?

133. ## Chemistry

A penny has a mass of 2.5 g and the moon has a mass of 7.35*10^22kg. What is the mass of 1 mole of pennies? How many moles of pennies have a mass equal to the mass of the moon?

134. ## English

Can you check these sentences for me, please? Thank you. 1)The setting of the novel is ambivalent since it seems to lie halfway between England and Scotland. 2) Utterson finds out that Dr Jekyll has created a potion, which enables him to release his evil

135. ## chemistry abs spectrum and wavelength

Hello, can someone please help me? I'm stuck on a question: I'm doing an analysis of the absorbance of FeSCN2+ at it's max wavelength (i.e. 450nm where abs=0.154)The species I used to make the solution tested were Fe(NO3)3, HNO3, and KSCN. Now, the

136. ## PHYSICS

2 pool balls of equal mass experience a perfectly elastic head on collision. 1 ball is traveling at 2m/s and the other at 3m/s in the opposite direction.What is thier speed just after impact? I know the balls swap speed and change direction but can't find

137. ## Math

A rectangular garden is two feet longer than it is wide. If the width is doubled, fifty extra feet of fencing will be needed to keep out the rabbits. What are the dimensions of the original garden

138. ## NEED YOUR HELP ASAP

CAN YOU HELP ME TO ILLUSTRATE QUESTION BELOW.. HOW IS CONTROL SIGNIFICANTLY APPLIED IN BUDGETING?

139. ## algebra

A research lab is planning to explore the North Pole. Ten members of the lab each have a dog team. There are 56 dogs in all. If there are only 7- and 5-dog teams, how many of each will there be

140. ## geometry

find the perimeter of an equilateral triangle with one side that measures 9.6 centimeters

141. ## English

The Victorian Age is known as a time of: A. liberal ideas B. carefree living C. conservative and strict ways of life. D. none of the above I think it's C?

142. ## Statistics

Of 100 people who were given a vaccine,80 developed immunity to a disease.the 98% interval on the proportion of people developing immunity is?need help

143. ## English

Realism differs from Romanticism in that realism: A. focuses on negative and Romanticism focuses on positive B. portrays life as it is and Romanticism on how life should be. C. uses details and Romanticism uses emotion. D. Both B and C I think it's D?

144. ## AP Calculus

Determine dy/dx if xsiny=artany i did (x)(cosy dy/dx) so far

145. ## people

ow did william the conquer laws promote the loyalty of his subject

146. ## Math

How do i solve using the elimination method. If the system has no solution or an infinite number of solutions, state this. 2x + 10y = 58 -14x + 8y = 140

148. ## Science-Motion

How could an object accelerate while still traveling at a constant speed

149. ## microbiology

Lactobacillus species ferment glucose, as demonstrated by the snyder test. What other metabolic functions might they perform judging by the list of ingredients: Yeast extract, agar, sodium chloride, pancreatic digestive casein. Thank you

150. ## microbiology

Lactobacillus species ferment glucose, as demonstrated by the snyder test. What other metabolic functions might they perform judging by the list of ingredients: Yeast extract, agar, sodium chloride, pancreatic digestive casein. Thank you

151. ## Math

A rectangular garden is two feet longer than it is wide. If the width is doubled, fifty extra feet of fencing will be needed to keep out the rabbits. What are the dimensions of the original garden

152. ## Chemistry

NF3 and PF5 are stable molecules. Write the electron-dot formulas for these molecules. On the basis of structural and bonding considerations, account for the fact that NF3 and PF5 are stable molecules but NF5 does not exist

153. ## Chemistry

The boiling points of the following compounds increase in the order in which they are listed below: CH4 < H2S < NH3 Discuss the theoretical considerations involved and use them to account for this order.

154. ## Math

The body consists of 7/10 water. Is more than 1/2 your body water? Explain.

Determine whether or not each of the following functions is invertible. Give your reasons for believing the function is invertible or not. Please check this for me. I am not sure if I am adequately explaining my answer and if my answer is right. a) y=

156. ## History

What aspects of Japanese culture were evident in samurai training?

157. ## chem

24. Hydrogen peroxide can decompose to water and oxygen according to: 2H2O2 (l) + -----------> 2H2O(l)+ O2 (g) ^ H = -196 kJ What is the enthalpy change accompanying the reaction of 5.00 g H2O2 (l) according to the above mentioned reaction ?

158. ## chemistry

What two metals from the lanthanides of the activity series will not generate hydrogen gass when treated with an acid?

159. ## chemistry

What two metals from the lanthanides of the activity series will not generate hydrogen gass when treated with an acid?

160. ## chemistry

24. Hydrogen peroxide can decompose to water and oxygen according to: 2H2O2 (l) + -----------> 2H2O (l) + O2 (g) ^ H = -196 kJ What is the enthalpy change accompanying the reaction of 5.00 g H2O2 (l) according to the above mentioned reaction ?

161. ## Chemistry

What makes Permanganate such a good oxidizing agent?

162. ## english

what significance do the lions on the beach have for the old man, from ernest hemingway the old man and the sea?

163. ## Algebra

using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this. 3x + 24y = 24 27x – 15y = -15

164. ## Math

If the perimeter of the rectangular ball field is 1 kilometer which of the following could be the field's dimensions? L=312m W=188m or L= 1/2 m W = 1/2 m

165. ## Science

If the perimeter of the rectangular ball field is 1 kilometer which of the following could be the field's dimensions? L=312m W=188m or L= 1/2 m W = 1/2 m

166. ## Spanish

64. Les sirven los frijoles refritos a. a mí b. a él c. a ellos d. a nosotros C? I don't really get it.. 65. ¿Qué _____ a Uds.? a. le falta b. les falta c. le faltan d. nos falta Also don't get this one. 66. "¿Van a salir en seguida?" "No, ya _____."

167. ## geometry

donald's garden is rectangular the garden is 14 metres long it's perimeter is 47 metres how wide is the garden

168. ## PHYSICS

A 33 cm-tall, 6 cm-diameter plastic tube has a sealed bottom. 266 g of lead pellets are poured into the bottom of the tube, whose mass is 45 g, then the tube is lowered into a liquid. The tube floats with 5 cm extending above the surface. What is the

169. ## A & P

Trace the anatomical pathway of the neural signal that must be sent from the primary motor area of the brain to the appropriate muscles of the arm and shoulder in order to lift a glass of water to drink.

170. ## math

A rectangular garden is two feet longer than it is wide. If the width is doubled, fifty extra feet of fencing will be needed to keep out the rabbits. What are the dimensions of the original garden

171. ## geometry

216 in cubed is the volume of a figure 27 in cubed is the volume of a similiar figure what is the scale factor?

Let f(x) = x^3 - x^2 + x - 1. Find an equation for tangent line to f at x = 2.

173. ## chemistry

how do you prepare 400 mM 100ml H2SO4 from 1M H2SO4

174. ## Geometry

I need points for making a 13ft.x 18ft eliptical

175. ## geometry

this arc contains 36 degrees and its length is 7 units what is the cicruference

176. ## micrbio

Lst possible reasons why the slite test is not appropriate for detecting free coagulase.

177. ## Science

Do neurons send electrical messages to the brain to tell the body what to do?

178. ## PreCalc

I'm not sure how to solve these with calculator. sec x = -2 , π ≤ x ≤ 3π sinθ=0.1473, 0°≤θ≤90° cosθ=0.7563, 0°≤θ≤90°

192. ## math

Use a tangent function to estimate the grade resistance of a 2200-lb car travelling on a 2.4° grade. Round your answer to the nearest pound.

193. ## MATH

350 lbs of flour were poured into 4 3/8 lbs packages. how many packages were filled?

194. ## Grammar

Can you help me with these sentences.Review the following sentences. Some of them are correct, whereas others contain an error with a commonly confused word. 1.The diplomats are doing what they can to restore peace. 2.I should of written down where I last

195. ## geometry

what is the length of any diagonal of a regular pentagon with a side of 20mm ?

196. ## algebra

how do I factor a polynomial completely, please tell me step by step.

197. ## social studies

i am a 7th grd and i have to do a three page eassy on been respectful it due by 3/23/11

198. ## math

Of one hundred students surveyed: 70 like basketball, 52 like football, 61 like baseball, 29 like baseball and football, 39 like football and basketball, 42 like basketball and baseball, 27 like all three sports. If a student is chosen at random, what is

199. ## precalculus

A population doubles every 30 years. Assuming exponential growth find the following: annual growth rate: % continuous growth rate: %

should have been 9 letters and the 6th one is a U

201. ## management, subject

please is anyone can help me this question. .different management function and discuss each function.

202. ## microbio

Why is it important to use fresh cultures in Coagulase test than in a test medium?

203. ## physics

A certain roller coaster has a circular, vertical loop of radius 10 meters, such that at its top the riders are upside down. How fast does the roller coaster move at this point if the riders feel perfectly weightless when passing the top of the loop?

204. ## math

What does rule mean in second grade math

205. ## physics

a very thin piece of copper wire has an electrical resistance of 20,000 Ohms. You connect its ends to a regular 2.0 Volt battery. How much power does it draw? Let's assume that this little piece of wire initially contained one trillion (that's a one with

206. ## geometry

what is the are of a parallelogram if it is 2 feet tall and 6 feet wide

need help with a crossword puzzle the words given are hale; hail;;bunt it has 5 letters and the last letter is T

208. ## math

simplify (6x^3-7x^2+3x+9)/(3x+9)

209. ## language

From a story,how do you draw a conclusion

210. ## Calculus

Fill in the following table, where E(x) denotes the error in approximation of f(x) by T(x). x - 2 x 3 2.1 2.01, 2.001 f(x) T(x) E(x)

211. ## chemistry

briefly explain why excess HCl and NaOH solutions must be collected for treatment before disposal, but the titration solution from a completed titration can be safely poured into the drain, diluting with a large amount of water.

212. ## survey of economics

How would you compute changes in Microsoft’s volume of output from one year to the next? How would price changes affect your computations?

213. ## chemistry

25ml of 0.05M of NaOH and the average volume of HCl is 17.7ml after titration and the concentration of HCl is 0.1028M. Find the [OH] eq (from titration). How do u solve this...

214. ## chemistry

What mass percent of a solution with 28.5 g of H2O2 and 300.0 mL of water?

215. ## Chemistry

How can you measure 20 mg. of salt?

216. ## history

According to legend these people fought a long war with the people of troy;a city in turkey. What was the name of the war.(has to do with Anceint Greece)

217. ## math

How can the teacher differentiate instruction when teaching number sense or mathematical operations? Please remember differentiate is for all levels (high, medium, low, ESL, and others)

218. ## Applications

Determine the median of the following numbers25,28,22,27,25,20/30,23,27, and 29

219. ## physics

Analyze the radial distribution of the H-atom at the 2s state. How are the maxima situated with respect to the minimum? Is the “golden ratio” involved?

220. ## physics

Consider two non-interacting Fermions (half-integer spin) confined in a “box”. Construct the antisymmetric wave functions and compare the corresponding ground-state energies of two systems; one with particles of identical spin and the other with

221. ## chemistry

Analyze the radial distribution of the H-atom at the 2s state. How are the maxima situated with respect to the minimum?

222. ## Acids and Bases

NaOH was added to 1.0 L of HI(aq) 0.40 M. Calculate H3O in the solution after the addition of .14 mol of NaOH. Calculate H3O in the solution after the addition of 0.91 mol of NaOH.

223. ## English

Can you please help me check these sentences? Thank you very much. 1.Some schools valued their pupils' athletic prowess more than their scholarly ones. 2.Factory owners were also oblidged by legislation to teach their duty (? they apprentices). 3.One of

224. ## Science

How do you separate a mixture of salt,pepper, and iron filings

225. ## math

Milan's gas tank is 1/5 full. After he buys 6 gallons of gas, it is 7/10 full. How many gallons can Milan's tank hold?

226. ## Math

What angle equal to 6/8 turn?

227. ## Chemistry

Is [PF5Cl]- polar?

228. ## chemistry

100ml of 0.05M of NaOH is added to 0.5g of Ca(OH)2. find the [OH] (from Ca(OH)2)

Let f(x) = x^3 - x^2 + x - 1. Find an equation for tangent line to f at x = 2.

230. ## math

How much intrest will u earn on a 50 0 deposi placed in a asavings accoun for 6 months if you are paid at a simple intrest rate of 5 percent

231. ## Chemistry

Phosphorous trichloride (PCl3) is produced from the reaction of white phosphorous (P4) and chlorine: P4(s) + 6Cl2(g) ! 4 PCl3(g) . A sample of PCl3 ofmass 280.7 g was collected from the reaction of 70.86 g of P4 with excess chlorine. What is the percentage

232. ## Chemistry

How many atoms of each element are present in five formula units of calcium permanganate?

233. ## Chemistry

2NaN3(s) −> 2Na(s) + 3N2(g) . If 0.65 mol of NaN3 reacts, what mass of nitrogen would result? Answer in units of g. Step by step with answer please! I'm begging!

234. ## English

Can you please chech these very last two sentences of the day? Thank you. I'm playing on my Nintendo DS these days. Where are you playing these days? Darwin eliminated the possibility of the creation also if this idea conflicted with the teachings of the

235. ## Chemistry

Phosphorous trichloride (PCl3) is produced from the reaction of white phosphorous (P4) and chlorine: P4(s) + 6Cl2(g) --> 4 PCl3(g) . A sample of PCl3 of mass 280.7 g was collected from the reaction of 70.86 g of P4 with excess chlorine. What is the

236. ## Physics

The engine weighs 4500 newtons and it is lifted 1.5 meters up by the block and tackle system. To accomplish this, the mechanic must apply a force of 225 newtons while pulling a total of 37.5 meters of chain through the block and tackle pulley system. What

237. ## AP Calculus

I previously posted this but had a mistake in it. Determine dy/dx if xsiny=arctany i did (x)(cosy dy/dx)+(1)(siny)=dy/(1+y^2) so far

238. ## 3rd Grade Science Definicions

It tells the location of somethind.It is spesific.Every place on a map has this.What is it?

239. ## math

Two of these statements are false. Identify them. 1.4x12>3x15 2.96/231+13 Answers: 1. 48>45 2. 4844 48

240. ## Soc-120

I have to start writing an essay for my sociology class and this is the topic I have to write about: "Racial discrimination and Hispanics in the United States" I have to come up with 1800 words on this topic I was wondering if you could help me come up

241. ## Calculus

Determine whether or not each of the following functions is invertible. Give your reasons for believing the function is invertible or not. Please check this for me. I am not sure if I am adequately explaining my answer and if my answer is right. a) y=

242. ## History

What was the second most big city state in greece. now the first is sparta but what is the other!!!

243. ## English

I have a question if these are correct.. Thank you for your help! 11. The officers are government officials. (LV= are, Pn=officers) 12. Their presence was necessary in the far north county in the early days. (lv= was, Pa=necessary) 13. Now they are famous

244. ## math

A quiz has 10 questions Aaron gets 3/5 of the questions right. How many questions did Aaron get right?

245. ## chemistry

How do I calculate 50ml of a 50mM sodium momophosphate buffer solution

246. ## Spanish

Forma oraciones para saber la historia de amor entre Alicia y Emilio. Ojo con el uso del pretérito Model: Alicia y Emilio / conocerse / en un café Alicia y Emilio se conocieron en un café. 1.no hablarse / pero / ellos mirarse profundamente

247. ## geometry

A guy wire is attached to the top of a 75 meter tower & meets the ground at a 65 degree angle. How long is the wire?

248. ## geometry

in a parallelogram abcd=28,bc=45,and ac=53. is the parallelogram a rectangle?

249. ## Physics

A coaxial transmission line has a solid inner conductor of radius a and a thin-walled outer conductor of radius b. The medium between the conductors has permeability (Mu)0. Find the inductance per meter of length of the line (a) if all current of the inner

250. ## Chemistry

At what tempature will a 3.0 m solution of sodium fluride freeze?

251. ## chemistry

how to find mass percentage

252. ## Chemistry

Calculate the boiling tempature for a solution which contains 0.325 mol of calcium phosphate (Ca3(PO4)2) dissolved into 240.0 g of water.

253. ## math

complete the table: y= x - +4 x: +4,0,-4.-6 y: ?,?,?,?

254. ## chemestry

balance the equations (single displacement) 1. zinc + Iron(II) Chlorine ----> 2. Zinc + Hydrogen Chlorine ---->

255. ## biology

The primary reaction catalyzed by catalase is the decomposition of hydrogen peroxide to form water and oxygen, which occurs spontaneously, but not at a very rapid rate. Write a balanced equation for this reaction. (Remember that catalase is not a reactant

256. ## Language Arts

The Fairfield Rockets were true to their name last night. They blasted off early in the first quarter and didn't slow down until the final buzzer in the fourth.

257. ## English

Have a question on Simple Verb Tenses. Need to reswrite each sentence, using the correct form of the verb in parentheses with s,ed,or will.. Thank for looking and helping me~~ 1. Long ago Plutarch___ stories of Greeks and Romans. (RELATE) Answer=related 2.

258. ## math 099

a rancher wants to use 300 feet of fencing to enclose a rectangular area of 4400 square feet. what dimensions should the rectangle have?

259. ## Math

Find the missing dimensions for each three-dimensional figure to the nearest tenth given the volume and other dimensions. I'm not understanding the cones too much. r=5in., v = 487in.3 How do I work it, given only the radius

260. ## Language Arts

Neither forward could be stopped. These two lit up the scoreboard with 54 points. In fact, the Rockets scored so many points that the scoreboard shorted out trying to keep up. The Rockets were just too hot to handle. The best play of the game came in the

261. ## bio chemistry

prepare 1M 100 ml H2SO4, density 1.84

262. ## CHEMISTRY URGENT!!!

Determine the pH (to two decimal places) of the solution that is produced by mixing 30.3 mL of 1.00×10-4 M HBr with 829 mL of 5.77×10-4 M Ca(OH)2.

263. ## College Chemistry

Calculate the pH of a solution prepared by mixing 250.mL of 0.174 molal aqueous HF (density=1.10g/mL) with 38.7g of an aqueous solution that is 1.50% NaOH by mass (density= 1.02g/mL).

264. ## biology

What effect did boiling the liver have on the reaction? Why?

265. ## social studies

What was the Fascist Party and what were their beliefs?

prepare 1M 100 ml H2SO4. 98% H2SO4, density 1.84

267. ## geometry

calculate the area, surface area, and volume for a right rectangular prism with a length 2cm, height 5cm, and width 3cm

268. ## science

determine the correct amount of sodium hydroxide needed to react with 1.0g iron (III) chloride.

269. ## MATH

You can choose chocolate,strawberryor vanilla frozen yogurt and red,blue,green sprinkles. A sundae has one yogurt flavor and two different colora of sprinkles. How many different kinds of sundaes can your order? List them Is there 9 different possible kind

270. ## chemistry

Calculate the [H3O + ] for 0.42 M HCl. Answer in units of M.

271. ## BIOLOGY

What happen when you put muscle in acetic acid

272. ## us history

after containment what would be considered the us foreign policy

273. ## Math

Check all that apply5/3 is the reference angle for: 2pi/3 15pi/3 7pi/3 19pi/3

274. ## Spanish

Forma oraciones para saber la historia de amor entre Alicia y Emilio. Ojo con el uso del pretérito. Modelo: Alicia y Emilio / conocerse / en un café Alicia y Emilio se conocieron en un café. no hablarse / pero / ellos mirarse profundamente No se

275. ## Statistics

The amount of fill(weight of contents)put into a glass jar of spaghetti sauce is normally distributed with mean=850g and standard deviation=8g.the probability that a random sample of 24 jars has a mean weight greater than 848g is?need help

276. ## Statistics

The null hypothesis,H0:u=48,was tested against the alternative hypothesis,H1:u>48.A sample of 75 resulted in a calculated p-value of 0.102.if standard deviation=3.5,the value of the sample mean is?need help

277. ## math

a rectangle is 7 ft by 9ft. a second is similar to the first with a perimeter of 260 ft. what are the dimensions of the second rectangle?

278. ## Chemistry

What is the volume of 0.129 M HCl(aq) re- quired to neutralize all of the hydroxide ions in 46 mL of 0.216 M KOH(aq)? Answer in units of mL. Answer: 77.0232 What is the molarity of Cl− ions at the stoichiometric point? Answer in units of mol/L. What is

279. ## Math

Colors are blue, pink,red, brown,black Styles are cardigan, crewneck, v neck What is the probability of choosing a brown sweater at brown?

280. ## pre calc

Solve the lograthmic function: ln(X+5) = ln(X-1) - ln(X+1) The answer has no solution but I do not know how to come to that answer. Help is greatly appreciated!

281. ## math

there are 80 fourth graders in school of these, 35 were boys. what fractional part of the fourth graders were girls

282. ## English

if I have a quote that starts at the beginning of a sentence would I leave it as a capital letter OR lowercase letter? Ex: On ....,"He saw ...." OR On ....,"he saw ...." in the source where i'm quoting it from: "He" would be the first word in the sentence

283. ## Physics

A pulley system has an efficiency of 78.0 per- cent. The acceleration of gravity is 9.81 m/s2 . How much of the rope must be pulled in if a force of 469 N is needed to lift a 52 kg desk 2.78 m?

284. ## Physics

A 305 kg piano slides 4.0 m down a 30° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.40. (a) Calculate the force exerted by the man. (b) Calculate the

285. ## math

6n2-19n+15=o (the 2 is an exponent) idk how 2 do it the teacher told us how but didn't show us plz help

286. ## math

What percentage of 13,000.00 is 8,000.00

287. ## Chemistry

A solution contains a mixture of Cl- and Br- ions. Can both be positively identified? Briefly explain and write appropriate equations to support your answer.

288. ## Math

given the fonction: y=3x^2-5x and x=g(t)derivable as g(14)=-4 and g'(14)=2 calculate dy/dt in t = 14

289. ## Chm General 2

if a student doing an experiment failed to dry the KHP before using it to standarize the NaOH solution. A) Would her calculated molarity of the NaOH solution probably be too hight or too Low?

290. ## Pre Calc

tan(x)=5 sin(x) for interval -π < x < π A) 0, 1.571 B) -1.571, 0, 1.571 C) -1.369, 0, 1.369 D) 0, 1.369

291. ## math

idk how 2 do it the teacher told us how but didn't show us plz help (the 2 is an exponent) 3b^2+b-10=0

292. ## Math2

Given f, a derivable function and y = f (x)^3 + 40√(f(x)+12) . Knowing that f(4) = -4 and that dy/dx|x=4 = 14 , calculate f’(4)

293. ## Math

Find the probability. You roll two odd numbers and pick a vowel ( when you roll two number cubes and pick a letter of the alphabet at random)

294. ## chemistry

prepare 1M 100 ml H2SO4. 98% H2SO4, density 1.84

295. ## Math

You toss tails and roll an even number ( when you toss a coin and roll a number cube) Find the probability. I thought It was 1/3 but I think that is wrong.

296. ## CIS

I have the pseudocode but i am confused with this question. Modify the Pay Calculator design from Week 3 to include a loop that allows the user to continue processing employee pay until the program user wants to stop or the maximum number of employees is

297. ## chemistry

O3SOOSO3^(2−) + Cr^(3+)+ -> HSO4^(1-) + Cr2O7^(2-). Could someone balance this redox reaction for me? I can't figure it out. Thanks

298. ## stoichiometry

6mols of N2 are mixed with 12mol H2, according to the following equation. N2+3H2----> 2NH3 a) which is the limiting reactant? B) which chemical is in excess? c) how many moles of excess reactant is left over? d) how many moles of NH3 can be produced? e)if

299. ## Chemistry-102

what is the ph solution obtained by mixing 25.00 ml of 0.250 ml HCl and 25.00ml of 0.125M NaOH

300. ## stoichiometry

6mols of N2 are mixed with 12mol H2, according to the following equation. N2+3H2----> 2NH3 a) which is the limiting reactant? B) which chemical is in excess? c) how many moles of excess reactant is left over? d) how many moles of NH3 can be produced? e)if

301. ## stoichiometry

6mols of N2 are mixed with 12mol H2, according to the following equation. N2+3H2----> 2NH3 a) which is the limiting reactant? B) which chemical is in excess? c) how many moles of excess reactant is left over? d) how many moles of NH3 can be produced? e)if

302. ## Spanish

no hablarse / pero / ellos mirarse profundamente No se hablaban pero ellos se miraban profundamente. inmediatamente / la muchacha y el muchacho / enamorarse La muchacha y el muchacho se enamoraron inmediatamente. ellos / abrazarse / y / besarse / aquella

303. ## chemistry

How many sodium ions are present in aqueous sodium phosphate if the sample size is 500 milliliters and the concentration is 2 Molarity?

304. ## Chemistry

Most chlorides are soluble in water. Give all of the formulae for the insoluble chlorides.

305. ## physics

a 1 kg mass is attached to a spring hanging vertically and hangs at rest in the equilibrium position. the spring constant of the spring is 1 n/cm. the mass is pulled downward 2 cm and released. what is the speed of the mass when it is 1 cm above the point

306. ## Chemistry

Give the molecular, complete ionic, and net ionic equations for the reaction of barium nitrate and sodium sulfate.

307. ## Calc - Evaluating Integrals

1.) upper bound: pi lower bound: 0 8sinx / sqrt(5-4cosx) dx 2.) upper bound: sqrt 3 lower bound: 0 4x / sqrt(x^2 + 1) dx 3.) upper bound: 1 lower bound: -1 (dx) / (3x-4)

308. ## physics

at what altitude should a satellite be placed into circular orbit so that its orbital period is 48 hours? the mass of the earth is 5.976x10^24 kg and the radius of the eatrh is 6.378x10^6 m.

309. ## Chemistry

Does the mixing of copper (I) nitrate with sodium iodide produce a precipitate? If so, give the molecular equation.

310. ## Chemistry

Is it possible to have an acid/base reaction and produce a precipitate as a product as well? If yes, provide an example.

311. ## Chemistry

Give the molecular, complete ionic, and net ionic equations for the combination of potassium chloride and magnesium sulfate.

312. ## physics-telescope

The Hubble Space Telescope (HST) can resolve objects that have a small angular separation because there is no atmospheric distortion of the light. (i.e. The HST has excellent resolving power.) Its 2.4-m-diameter primary mirror can collect light from

313. ## Chemistry

According to the Bronsted-Lowry definition of acids and bases, is water an acid or base? Provide examples to support.

314. ## Chemistry

Give the molecular, complete ionic, and net ionic equations for the reaction of phosphoric acid and magnesium carbonate.

315. ## Chemistry

How many grams of water are produced from the reaction of 1L of 2 molarity hydrochloric acid with 1L of 2 Molarity barium hydroxide?

316. ## Chemistry

What is the concentration of an acetic acid solution if 11.2 mL of 1.002 Molarity sodium hydroxide solution is needed to completely neutralize 5.1 mL of the acid?

317. ## Chemistry

Give the molecular, complete ionic, and net ionic equations for the reaction of sulfuric acid and barium hydroxide.

318. ## Chemistry

Give the molecular, complete ionic, and net ionic equations for the reaction of ammonia with hydrochloric acid.

319. ## Chemistry

How many mL of 1.211 Molarity sulfuric acid is required to completely neutralize 10.0 mL of 3.210 Molarity calcium hydroxide?

320. ## maths

how to convert 1kg 400gms into mixed fraction

321. ## Biology

Will iodine react with sucrose or glucose? I would say no, because it reacts with starch, a polysaccharide, and glucose is a monosaccaride and sucrose is a combination of fructose and glucose, two monosaccharides. Am I right? Why or why not? How does

322. ## biochemistry

If glucose is labeled with 14C in position C-1, where does this label end-up if the glucose goes through the oxidative phase of the pentose phosphate pathway?

323. ## biochemistry

4) phosphofructokinase-1 strongly inhibited by an ATP analog in which the oxygen atom joining the ƒÒ- and ƒ×-phosphorus atoms is replaced with a methylene group?

a stressed chemistry student is hyperventilating into a paper bag. The student stops to wip his brow after a few breaths, and the bag is at 5.7 KPa and the temperature in the lecture hall is 24 degrees C. The bag is 0.75 L full. The student then goes at it