Questions Asked onMarch 20, 2013

1. Pre-Algebra

1. What data are represented by the stem-and-leaf plot below? 3 | 7 8 9 4 | 1 3 7 5 | 2 4 Key: 4 | 1 means 41 a. 37, 38, 39, 41, 43, 47, 52, 54 b. 73, 83, 93, 14, 34, 74, 25, 45 c. 7, 8, 9, 1, 3, 7, 2, 4 d. 37, 38, 39, 14, 34, 74, 25, 45 2. Find the mode

2. statistics

Jim Tree sells trees. The mean length of the trees purchased was 68 inches with a standard deviation of 10 inches. Jim wants to know what percent of his sales were more than 84 inches tall. He can use the standard normal distribution to help him. He asks,

3. Math Ms. Sue please

1. What type of graph does not show the number of times a response was given? (1 point) box-and-whisker plot line plot stem-and-leaf plot bar graph 2. Which of the following types of information is suited for display on a scatter plot? (1 point)

4. Lang, Arts

1.Which of the following would always require a citation in a research paper? A.Thesis statement B.an anecdotal experience C.a quotation D.a humorous statement I think it is C...? 2. Which of the following shows the correct parenthetical citation for

5. chemistry

Mixtures of helium and oxygen are used in scuba diving tanks to help prevent ‘the bends’, a condition caused by nitrogen bubbles forming in the bloodstream. If 95 L of oxygen and 25 L of helium at STP are pumped into a scuba tank with a volume of 8.0

6. Chemistry

A 5.0-g Sample of KBr at 25.0 degrees celsius dissolves 25.0 mL of water also at 25.0 degrees celsius. The final equilibrium temperature of the resulting soltution is 18.1 degrees celsius. What is the enthalpy of of solution in kilojoules per mole of KBr?

7. Math

What type of graph does not show the number of times a response was given? (1 point) a.box-and-whisker plot b.line plot c.stem-and-leaf plot d.bar graph I choose c is that correct

8. Chemistry

Which of the following pairs would make a good buffer solution in an aqueous solution? A) H2SO4 and NaHSO4 B) Ca(NO3)2 and HNO3 C) HCl and NaCl D) HF and NaOH E) none of them I know the answer is D but I don't understand why. I would think it would be C

9. calculus

1. The radius of a sphere is r inches at time t seconds. Find the radius when the rates of increase of the surface area and the radius are numerically equal. A 1/4π in B 1/5π in C 1/3π in D 1/8π in E 1/2π in

70. Chemistry

Name the organic product of the following nucleophilic substitution reaction. OH+CH3CH2I

71. Physics

A rescue helicopter is lifting a man (weight = 797 N) from a capsized boat by means of a cable and harness. (a) What is the tension in the cable when the man is given an initial upward acceleration of 0.711 m/s2? (b) What is the tension during the

72. physics

You're in an auto traveling at 25.0m/s toward a pole mounted warning siren. If the siren's frequency is 365 Hz, what frequency do you hear? Use 343m/s as the speed of sound.

73. Chemistry

Calculate the pH of a buffer solution containing 1.0 M ammonia (NH3 ; Kb = 1.8 x 10-5) and 1.0 M ammonium chloride (NH4Cl).

74. Chemistry

1. The reaction CO+2H2-CH3OH was carried and it is found that only 332g of CH3Oh is actually produced when 407g CH3Oh was the expected yield. What is the Percent yield? 2. If 112g of CaO is reactied with an excess of NH4Cl and 64.0g of NH3 are produced,

75. algebra

find the midpoint of the line segment with endpoints (-5, _5) and (7, 9)

76. Physics

A) With what minimum speed must you toss a 190 g ball straight up to hit the 15.0 m-high roof of the gymnasium if you release the ball 1.70 m above the ground? Solve this problem using energy. B) With what speed does the ball hit the ground?

77. chemistry

The most common source of copper (\rm Cu) is the mineral chalcopyrite (\rm CuFeS_2). How many kilograms of chalcopyrite must be mined to obtain 210.g of pure \rm Cu?

78. math

a recipe for chocolate chip cookies calls for 1 1/2 cups of flower. If you are making 2 1/3 recipes, how many cups of flower are needed?

79. AlgebraB-2

I need help with figuring out how to do these problems to get the right answer. Appreciate any help. Thanks. Multiple choice: 1. What is the value of n so that the expression x² + 12x + n is a perfect square trinomial? 6 36 72 144 2. What are the

asked by Jennifer W.
80. Math

A 6 ounce package of fruit snacks contains 45 pieces. How many pieces would you expect in a 10 ounce package?

81. Physics

A) With what minimum speed must you toss a 190 ball straight up to hit the 15.0 -high roof of the gymnasium if you release the ball 1.70 above the ground? Solve this problem using energy. B) With what speed does the ball hit the ground?

82. chemestiry

Al2(SO4)3(aq) + BaCl2(aq) BaSO4(s) + AlCl3(aq) Consider the unbalanced equation above. A 0.680 g sample of impure Al2(SO4)3 reacts with excess BaCl2. If the sample produces 0.530 g of BaSO4, what is the mass percent of Al2(SO4)3 in the sample?

83. Physics

The drawing shows a square, each side of which has a length of L = 0.25 m. Two different positive charges q1 and q2 are fixed at the corners of the square. Find the electric potential energy of a third charge q3 = -5 x 10-9 C placed at corner A and then at

84. chemistry

Nitric acid can be prepared from ammonia by the following steps; 4nh3 + 5o2 = 6h2o + 4no 2no + O2 = 2no2 2no2 + h2o = hno3 + hno2 3hno2 = hno3 + 2no + h2o If all the steps take place consecutively, completely and without recycling, what mass of ammonia is

85. Math

Find the median mode and range for each set of data. 1.11,18,19,20,20,23 Median=19.5 Mode=20 Range=12 2.52,56,60,67 Median=58 Mode=No mode Range=15 3.6.6,7.5,7.5,7.8,8.0 MEdian=7.5 Mode=7.5 Range=1.4 4.89,91,92,92,95 Median=92 Mode=92 Range=6 5.18,23,23,25

90. basic english makeup

PLEASE HELP ME THESE THE ONLY ONES I COULDNT FIND THANK U SO MUCH 1.Which of the following is not a key consideration when developing a piece of writing? A.The timeliness of the message B.The purpose of the message C.The intended audience D.The format of

91. Chemistry

1) What volume of 1.25 mol/L hydrobromic acid, HBr(aq) will neutralize 75.0 ml of 0.895 mol/L magnesium hydroxide Mg(OH)2(aq)? 2) a 25.00 mL sample of a nitric acid solution , HNO3(aq) is neutralized by 18.55mL of a 0.1750 mol/L sodium hydroxide, NaOH(aq)

92. Biology

Research and discuss an event in Charles Darwins' life that lead to his theory of evolution. Events could be directly in Charles Darwin's life or could be individuals whose ideas Darwin incorporated into his work. Besides the voyage to Beagle and the visit

93. chemistry

How many mL of 0.40M NaOH are need to neutralize 30.0 mL of 0.50 M H2SO4 according to the following reaction. 2NaOH(aq) + H2SO4 (aq)----Na2SO4 (aq) + 2H2O(l)

94. PHYSICS

8) Which one of the following objects, all initially at the same temperature, will be most efficient in losing heat? a dull black box in vacuum a polished silver box in air a dull black box in air a polished silver box in vacuum

95. English

Click on the box to choose the function of the italicized infinitive phrase. May I have permission to use the car tonight? I think its adjective.

96. NJHS (essay)

hi, i'm currently applying for the national junior honor society, and i'm working on my essay. any ideas what i should include??? ps. i have no leadership experience and the section is blank! D:

97. Chemistry

Consider the reaction CO3^-2+H2OHCO3^+OH^-. Kb for CO3^-2 is 2.1x10^-4 at 25 Celsius . What is Ka for the HCO3^- ion at 25 Celsius?

98. geometry

the perimeter of a quadrilateral is 30 cm. what is the maximum possible area of the quadrilateral.

99. math

A polling company took 5 polls in the week before and election. It showed that a mayoral candidate would get 66%, 56%, 55%, 60%, and 63% of the votes. That candidate received 64% of the total votes during the actual election. Find the percent error in the

100. math

If r = 12.5 and s = |−13|, which of the following inequalities is not true??? 1.r≠s 2.r< s 3.r≥s 4.r≤s

101. Math

If a 6 meter pole and a 3 meter pole are connected by wires from the top to bottom, how tall is the pole touching the intersecting wires?

102. Math

There are 12 girls and 9 boys in Mrs. Johnson's classroom. She said that if she randomly selects one student from her classroom the probability that it is a boy is 3/4. Which mistake did Mrs. Johnson make? A. She divided the number of girls by the total

103. Chemistry

How do the following solutions show the properties of a buffer? 1) 50 ml 0.10 M NH3 + 50 ml 0.10 M NH4NO3 2) 10 ml solution #1 + 5 ml H2O + 1 ml 0.10 M HCl 3) 10 ml solution #1 + 6 ml 0.10 M HCl 4) 10 ml solution #1 + 5 ml H2O + 1 ml 0.10 M NaOH

104. 3rd grade math

Benny is using base ten blocks to model 57 divided by 3. he divided the tens in to equal groups. he converted the remaining 10's in to 20 ones. then he divided 20 by 3, and put the ones into equal groups of 6, with 2 leftover. what did he forget to do?

105. Science

How do the structures of organisms compare and contrast to nonliving structures like construction cranes,ships,airplanes or bridges?

106. Chemistry

Given Zn(NO3)2 + (NH4)2S = ZnS + 2NH4NO3 (molar mass of Zn(NO3)2 189 g, molar mass of (NH4)2S 68 g), what is the molarity of a 250 ml solution if you have 123 g of zinc nitrate?

107. STAT 250..Help!

What is the probability of randomly selecting a z-score less than z = –0.80 from a normal distribution? a)-0.2119 b)0.7881 c)0.2119 d)-0.7881

asked by Jane Segurra
108. physics

After falling from rest from a height of 26 m, a 0.49-kg ball rebounds upward, reaching a height of 16 m. If the contact between ball and ground lasted 1.8 ms, what average force was exerted on the ball?

109. physics

n anti-aircraft gun fires a 23.7 kg shell with a muzzle speed of 880 m/s. What magnitude propulsive force was necessary to attain the muzzle speed within the 5.05 m barrel? (Assume constant acceleration and neglect the Earth's gravitational effect.)

110. Math

Find the median more and range 1.20,42,45,48,50,50 Median=46.5 MOde=50 Range=30 2.6,6,8,10,11 Median=8 Mode=6 Range=5 3.94,100,103,104,105 Median=103 Mode=No mode Range=11 4.1.6,1.7,1.8 Median=1.7 Mode=No mode Range=.2 5.6,8,10,11,13 Median=10 Mode=No mode

111. maths

ABC is a triangle with ∠BAC=60∘,AB=5 and AC=25. D is a point on the internal angle bisector of ∠BAC such that BD=DC. What is AD^2?

112. Physics MOMENTUM

1) A 1 kg moving at 1 m/s ha s a totally inelastic collision with a 0.7 kg mass. What is the speed of the resulting combined mass after the collision? 2) A 0.010n kg bullet is shot from a 0.500 kg gun at speed of 230 m/s. Find the speed of the gun.

113. HELP

A brass rod with a length of 10.0 cm is placed end to end with an aluminum rod with a length of 30.0 cm and this system is placed between a hot temperature of 100°C and a cold temperature of 10.0°C. The coefficient of thermal conductivities of the brass

114. science

How much does it cost to operate a 80-{\rm W} lamp continuously for a week if the power utility rate is 25 {\rm cents}/{\rm kWh}.

115. chemistry

Calculate the partial pressure of 3.25 moles of oxygen that have been mixed (no reaction) with 1.25 moles of nitrogen in a 25.0 L container of 298 K.

116. chemistry

What is the limiting reagent in this problem? A total of 40.0 mL of 0.55 M copper (II) sulfate solution is added to a beaker containing 2.02g of zinc.

117. stats

A random sample of n=16 scores is obtained from a population with a mean of µ= 80 and a treatment is administered to the sample. After treatment, the sample

118. Physics Impulse

A 2 kg cart rolls across the floor and runs into the wall and sticks. Before the collision the cart has a velocity of 4 m/s in the x direction. The collision took place in 0.1 s. 1) What was the cart's momentum before the collision? 2) What was the cart's

119. life orientation

8 ways in which the environmental problem impact within south africa

120. ela

how do i get a good grade on ela comprehension multiple choice test.

121. Chem

Saccharin is a weak organic base with a Kb of 4.8X10^-3. A 0.672-g sample of saccharin dissolved in 30.0mL of water had a pH of 12.34. What is the molar mass of saccharin?

122. physics

A strong lightning bolt transfers about 26 C to Earth. How many electrons are transferred?

123. math

a piece of rope 3m 66 m long was cut into 2 pieces. the longer piece was twice as long as the shorter piece. What was the length of the longer piece?

124. chemistry

How many grams of Mg(OH)2 are needed to neutralize 55 ml of 0.25 M HCl . according to the following reaction. (show all calculations for credit) Mg(OH)2 (aq) + 2HCl(aq) --- MgCl2 (aq) + 2H2O(l)

125. physics

Two masses of 8 kg and 12 kg are tied to each end f a string passing over a massless and frictionless pulley. find the resulting accelration of each mass.

126. AP Physics

Two particles, each of mass m and speed v, travel in opposite directions along parallel lines separated by a distance d. (a) Find an expression for the magnitude L of the angular momentum of the two-particle system around a point midway between the two

127. math

sonya spent 3/8ths of her money and had 15 dollars left what did she start with

128. Physics

Okay so i'm having a little trouble explaining the answer to a phys lab question concerning rolling friction: Assuming that f = µN , show that the coefficient of (rolling) friction for the car moving down the inclined plane with a constant speed is given

129. chemistry

if a total of 18.6 mol of NaHCO3, and 6.2 mol of C6H8O7 react, how many moles of CO2 and Na3C6H5O7 will be produced?

130. math

one mile is 5,280feet. i have a stride of 32inches. how many steps will i take to run a 26-mile marathon?

131. algebra 1

3a+b=52a+5=10use elimination to solve each systems of equations.

132. chemistery

How many grams of (NH4)2S2O3 were in the fertilizer sample

133. STAT 250 Probability

Final averages are typically approximately normally distributed with a mean of 66 and a standard deviation of 10.5. Your professor says that the top 5% of the class will receive an A; the next 15%, a B; the next 47%, a C; the next 22%, a D; and the bottom

asked by Jane Segurra
134. STAT 250 Probability

Final averages are typically approximately normally distributed with a mean of 66 and a standard deviation of 10.5. Your professor says that the top 5% of the class will receive an A; the next 15%, a B; the next 47%, a C; the next 22%, a D; and the bottom

asked by Jane Segurra
135. Physics

A man seeking to set a world record wants to tow a 122000-kg airplane along a runway by pulling horizontally on a cable attached to the airplane. The mass of the man is 95 kg, and the coefficient of static friction between his shoes and the runway is 0.74.

136. Physics

Heat flow question help?A brass rod with a length of 30.0 cm is placed side by side with an aluminum rod with a length of 30.0 cm and this system is placed between a hot temperature of 100°C and a cold temperature of 10.0°C. The coefficient of thermal

137. Chemistry

Find the pH: 1) A 0.001M solution of HCl 2) A 7.98 x 10^-2 M solution of HNO3 3) 1098L of a solution containing 8.543moles of HBr 4) 120mL of a solution containing 0.005 grams of hydrochloric acid. Please help me with these four. Out of 20 questions i only

138. Math

This number is less than 200 and greater than 100. The ones digit is 5 less than 10. The tens digit is 2 more than the ones digits. What is the number ?

assuming the economy has gotten better andthat the funds now have a return of 7.72% compounded monthly. Diane salary has risen now she can contribute $1000 a month. At the end of the next 15 yrs, how much is her account worth. asked by Najee 140. chemistry 2NOBr(g) 2NO(g) + Br2(g) and the value of Kc = 1.98, at a temperature of 282 K what is the value of Kp ? (Hint: Use the value of R in the appropriate units.) asked by Kara 141. Math Simplify the sum 4 5 ______ + ______ M+9 M^2 - 81 asked by John 142. Pre Calc$1 is invested into an account that has a APR of 8% compounded quarterly. How long will it take for my money to double? To triple?

asked by Haley James
143. math

Your program has an RDT&E-funded project scheduled to start in July 2005 which is expected to take 12 months to complete. The project is expected to cost a total of $12 million (then-year dollars), with cost expected to be incurred at a rate of$1 million

give an example of a situation that has 8 different outcomes

145. physics

Light bulb packages will have at least two numbers on them; a power and what the potential difference across the bulb must be so that the bulb has the listed power. You go to the store and purchase two light bulbs. The package for Bulb A says 40 W in a

146. English

Are Romeo and Juliet destroyed by fate, by their own flaws, by the flaws of others, or by a combination of factors?

asked by sami doodles :-)
147. Physics

A man seeking to set a world record wants to tow a 122000-kg airplane along a runway by pulling horizontally on a cable attached to the airplane. The mass of the man is 95 kg, and the coefficient of static friction between his shoes and the runway is 0.74.

148. math

a class of 15 student with 5 girls and 10 boys.they are divided into 3 groups each of 5 to do different group projectA,B,C respectively .how many ways can be grouped (A)if no restriction?(B)each group has only one gender?

149. Calculus - Optimization

The cost of fuel for a boat is one half the cube of the speed on knots plus 216/hour. Find the most economical speed for the boat if it goes on a 500 nautical mile trip.

150. English

Can anyone help me make a diamante poem about drums? Drums Sound Loud playing listening reading That's all I have so far. after that I have to put 2 nouns and 2 opposite nouns of the topic.. then opposite ing words... and then opposite adjectives about the

151. math

Chelsea has 3 quarters and 1 dime. James has 8 dimes. Peter has 2 quarters and 6 nickels. Denika has 10 nickels. Who has the most money?

asked by Mrs. Vargas
152. northrise university

What is natural law?

153. English III Freedom Writers

have you watched the movie Freedom Writer? can you please help me with my assignment? 1) consider the reasons why the groups have been used. 2) How this representations of different cultural groups are challenging or stereotypical? PLEASE HELP MEEE!!!!!

154. Physics

A certain car is capable only of accelerat ing at 3.0m/s 2 , braking (decelerating) at 5.0m/s 2 , and moving at constant velocity. The car is init ially located 100m from a road sign. The driver, starting from rest, begins to accelerat e towards the sign.

155. math

what is 14.876 rounded to the nearest hundredths?

156. Math

Im helping my son to find the area of a rectangle that is 7 3/8 inches and 4 inches the height. I need to know how to convert the fraction into a whole number.

157. physics

Susie and Sally are seated on opposing sides of a seesaw. Sally weighs 500 N and is seated a distance of 2 m from the fulcrum (point of rotation). Susie weighs 450 N and is seated a distance of 2.5 m from the fulcrum. Who is being lifted upward?

158. Spanish 2

Use a form of "ser" or "estar" to fill in the blank. Note: Only type the missing word. Do not type capital letter nor period. Tú ____ enfermo.

159. physics

A train moves at a speed 72km/hr. When it approaches the station the driver brakes the train stops in 30 minutes. a) what is the value of deceleration? b) what is the duration it takes to stop?

160. math

find all solutions to 4tanθ + √3 = tanθ

161. Calculus 2

solve this differential equation: dy/dt=0.06y(600-y) y(0)=10 y(t)=?

162. math

How do you evaluate the following: Bill has two times as many coins as Tina.

163. economics

demand funtion for a commodity is=12-3p.

164. Physics

A rectangular conducting homogeneous (which means the material is the same throughout) block has dimensions 1cm x 2cm x 3cm . A voltage V is applied between all opposite faces of the block and the corresponding currents were recorded. What is the maximum

165. math

draw the following and name them find missing angles... a trinagle has sides 4in,6in and 9in

166. 3rd grade math

which fraction is grater than 1/3 A. 1/2 B. 1/4 C. 1/5 D. 1/6

167. maths-surface area

there is a groove which is in a cylindrical form and is made in a cylindrical piece of wood of length 17.5cm. The groove is filled with graphite and the cylindrical graphite block is of same length as that of wooden piece. If the diameter of the graphite

168. Tangent Lines (2)-Calculus

find an equation of the line tangent to y= sqrt(25-x^2) at the point (3,4) i got y= x/8 + 29/8 this is wrong. but im not sure why. can you explain thank you

169. physics

After 35 minutes of running, at the 8-{\rm km} point in a 9-{\rm km} race, you find yourself 200m behind the leader and moving at the same speed. What should your acceleration be if you are to catch up by the finish line? Assume that the leader maintains a

170. Calculus

Use implicit differentiation to write the slope-intercept equation of the tangent line to the graph of (x^2+4)y=8 at the point (2,1):

171. Calculus

Use implicit differentiation to write the slope-intercept equation of the tangent line to the graph of (x^2+4)y=8 at the point (2,1):

172. Hess's law

I need some help with this one please... A+B ----> 2 D H= -765.3 kj S= 344 j/k C ------> D H= 521 kj S= -171 j/k calculate G at 298 K for A+B ------> 2C I know I need to use the formula G= H-TS but I don't know how to get the numbers.

173. Physics

Four charges with equal magnitudes of 7.81 × 10-12 C are placed at the corners of a rectangle. The lengths of the sides of the rectangles are 2.52 cm and 4.02 cm. Find the magnitude of the electric field at the center of the rectangle in Figures a and b.

174. english romeo and juliet

I am writing an essay which has to have 3 character traits of romeo and 2 quotes to support each trait. I still need quotes for impulsive and fearless. Can you please help?

230. math

y=-2x-1 how to set up to find what x is, this needs to graph as a linea equation.

231. Math

Is the equation sinx + cosx = 1 an identity? Why?

232. Accounting 1

Red Bank Enterprises was involved in the following transactions during the fiscal year ending October 31: 8/2: Borrowed $75,000 from the Bank of Kingsville by signing a 120-day note. 8/20: Issued a$40,000 note to Harris Motors for the purchase of a

233. geometry

Lin says that a hexagon has six sides. Chris says that it has eight sides. Whose statement is correct?

asked by Mrs. Vargas
234. chemistry

why wouldn't a higher experimental ratio of HCl increase the reaction rate for synthesis of t-pentyl alcohol?

235. maths-parallelogram

There is a man who plotted a land in shape of a trapezium with its parallel sides to be 15m and 5m & height=9m. The Panchayat decided to take a triangular plot of land from one side to construct a school. He reluctantly agrees to this. is this can be

236. simple PHYSICS!!!

The sun goes around the center of our galaxy once every 250 million years. The sun is also 2.55×10^20 m from the center of our galaxy. What is the acceleration of our sun towards the center of the galaxy in m/s^2?

237. science

How do organs relate to cells and tissues?

238. Physics

A flat circular coil with 103 turns, a radius of 3.96 10-2 m, and a resistance of 0.456 Ω is exposed to an external magnetic field that is directed perpendicular to the plane of the coil. The magnitude of the external magnetic field is changing at a rate

239. math

harriet and harry got jobs at the bumblo gum factory as bubblegum testers. for every bubble they blow they get 50 cents. harriet blows 100 bubbles and harry blows 150 bubbles. harry says, "wow! between the two of us, we've only made 12.50 today!" what was

240. transport economics

how to analyse ITP

241. Math

If the minute hand of a big clock is 1.12m long, find the rate at which its tip is moving in centimeters per minute.

242. chemistry

How many Liters of a 5.00 M Zn(NO3)2 would be needed to react with 200 g of (NH4)2S?

243. Math

3^x=10. Solve for x algebraically.

244. Derivative

with respect to x f(cos x) if f'(x)= 1/x find (f(cos x))' i got tan x sec x this is wrong. please explain. thank you

245. English

1. We will win the game against Japan. 2. We will win the game with Japan. Q1. Are both the same in meaning? Q2. What is the part of speech of 'against Japan'? Is it an adjective phrase or an adverbial phrase?

246. social studies

why did the maya civilization dissapear

247. Math

There are 12 girls and 9 boys in Mrs. Johnson's classroom. She said that if she randomly selects one student from her classroom the probability that it is a boy is 3/4. Which mistake did Mrs. Johnson make? A. She divided the number of girls by the total

248. math

how does the no. of regions increase when another chord is added to the circle?

249. Spanish 2

Mary es de Kansas. Mary es ____.

250. Spanish 2

Juanita es de España. Juanita es ____.

251. math

A school uniform consists of a shirt and a pair of shorts. A shirt costs $22. A pair of shorts costs$15. Write an expression to find the cost of supplying n students with uniforms. Evaluate the expression for 8 students.

252. Math

Find the rule for a table like this. 1 3 2 5 3 8 4 9 5 10

253. English

How can we bring these topics under one essay or an article?! Spending too much time at your computer Reducing traffic in large cities Building more car parks in large cities Using public transporter instead of cars Speed limits

254. physic -shm

a bob of pendulum is filled with water and small hole is made on the tip,and it is moved .how will the time period change?

255. math

There are 24 trucks and 8 cars in a parking lot. About what percent of vehicles are cars

256. English

Which sentence uses italics, quotation marks, and punctuation correctly? (1 point) “How many r’s are there in the word February”? “How many r’s are there in the word February?” asked Ty. “How many r’s are there in the word February,”

257. Early childhood

Can someone check if this is correct? Of all ages, ages four year olds need the most a) challenge and variety b) love and attention c) structure and discipline d) freedom and spontaneity I think it's a or d but I think a) challenge and variety more????

258. Math

Can you completely cover a 4 ft by 8 ft area with 3 ft by 3 ft tiles without cutting the tiles?

259. Curriculum

Teacher intervention does NOT include a) statement of child's feelings b) seperation of all children involved c) statement of what that could or couldn't do d) simple, clear reason for restrain.. Is b) seperation of all children sound correct?

260. Lang, Arts

4. Which of the following sentences is a compound sentence? A.Charlie said it’s cold outside but hot in his bedroom. B.Jared enjoys eating eggs and bacon for breakfast. C.Sierra can’t decide between the blue and the black shoes. D.Thomas is meeting us

261. George Carver

If the length or the triangle is 35 and the base is 53 what is the length of the other side of the triangle.

262. maths-area of parallelogram

There is a man who plotted a land in shape of a trapezium with its parallel sides to be 15m and 5m & height=9m. The Panchayat decided to take a triangular plot of land from one side to construct a school. He reluctantly agrees to this. is this can be

263. English

Word box compact earmark scant strident Since the time we have to prepare for the final exams is exceedingly ____ we had better make the best of every hour This one is compact or scant? I think it's compact

264. Derivative

Find dy/dx for the following: 1) x^3 + 3x^2*y + y^3 = 4 I get -3(x+2y)/x^2 + y^2 it's wrong though. 2) x + y^2= xy^2 I get y^2 + 1/ 2y- 2xy this is also wrong. can you explain thanks

265. Derivatives

with respect to x f(cos x) if f'(x)= 1/x find (f(cos x))' i got tan x sec x this is wrong. can you explain thank you

266. algebra

In 2000, the average family net worth was \$360,000 and there were about 7.7x10^7 families. Calculate the total family net worth in 2000.

267. social studies

what nation is home to the gonges and indus river

268. college physics

If the initial tension in the string is (2.10+/- 0.02)N, what is the tension that would double the wave speed?

269. Chemistry

How many grams of H2SO4 are needed to make a 4.50 m solution in 300 g H2O?

270. simple PHYSICS!

The combination of the force of gravity and my hand provide a net force of 40 N on a ball straight up. The ball accelerates at 100 m/s^2 while it is in my hand. What is the mass of the ball in kg?

271. science

How does the hierarachical organization of organisms work within a system?

272. math

Proving Trigonometric Identities 1. sec^2x + csc^2x= (sec^2 x)(csc^2 x) 2. sin ^3 x / sin x - cos 3x / cos x = 2 3. 1- cos x/ sin x= sin x/ 1+ cos x 4. 2 sin x cos ^2 (x/2)- 1/x sin (2x) = sinx 5. cos 2 x + sin x/ 1- sin x= 1+ 2 sin x

273. Math

In a flower box there are nine red flowers and six white flowers.there are three times as many yellow flowers as white ones.how many flowers are there in all?

274. Math

Find the first five terms of the sequence using the recursive rule: a1 = 2/3, and An = 5a N-1

275. mathematics

s=(2+3t)(5t-4) find ds/dt at t= 4s/2

276. Maths

What is the highest power of 3 that divides 1000! (1000 factorial)

277. Math

What should you say when u meet and angle?

278. physics

Let |α⟩=1M√∑M−1j=0αj|j⟩ and let |β⟩=1M√∑M−1j=0βj|j⟩ be its QFTM. Suppose we shift the superposition |α⟩ to produce |α′⟩=1M√∑M−1j=0αj|j+1(modM)⟩, and let |β′⟩=1M√∑M−1j=0βj′|j⟩ be the QFTM of

279. Motivation and Emotion

How would the behaviourist perspective of psychology explain the motivation behind the long hours and irregular schedule resulting in sleep deprivation in dancers.

280. math

give an example of a situation that has 8 different outcomes

281. math

greatest no. of regions in a circle with 4 chords?

282. trig

Sandra wants to find the height of a moutain. From her first location on the ground, she finds the angle of elevation to the top of the mountain to be 35 degrees 15 minutes. After moving 1000 meters closer to the moutain on level ground, she finds the

283. math

A triangle has angles measuring 35 degrees and 53 degrees.What is the measure of the third angle of the triangle.

284. Pre-Algebra

Find the mean of the following data set: 25, 30, 20, 20, 25, 35, 35, 10 15 20 25 30 15 IS MY ANSWER

285. algebra (checking answer)

Checking to make sure I did it right.. Remainder theorem to find the remainder when f(x) is divided by the given x-k f(x)=x^3-4x^2+2x+4; x+2 2 x -4 2 4 1 2 -4 4 1 -2 -2 8 2)x^3-4x^2+2x+4. (X^3-2x^2-2x) is the answer x^3 -2x^2+-2x -2x^2+4x 6x+4 -2x+4 8x+8