# Questions Asked onSeptember 20, 2010

75. ## math

Assume that there are 13 frozen dinners: 5 pasta, 4 chicken, and 4 seafood dinners. The student selects 5 of them. What is the probability that at least 2 of the dinners selected are pasta dinners?

76. ## Math

Solve this problem using the simplex method. A company manufactures checker sets and chess sets. Suppose each day the company has available 1200 boards (which can be used for both games) and 80,000 units of wood for making pieces. Each checker set uses 20

77. ## Math ( Surveying )

Need help with this problem! Thanks in advance. The ground clearance of an overhead electrical cable must be determined. Surveyor B is positioned directly under the cable (surveyor B can make a position check by sighting past the string of a plumb bob,

78. ## Physics

Ball is thrown horizontally off a cliff with an initial speed of 20m/s. a) how long does it take the ball to hit the ground 20m below. b)how long would it take to hit the ground if it was dropped from the cliff? c) how long would it take to hit the ground

79. ## geometry

find the measure of an anGle if five times the measure of its complement is 24 derees less than twice the measure of its supplement. What is the equation? What is the measure?

80. ## chemistry

Calculate the amount of heat required to raise the temperature of a 25 sample of water from 7 to 25.

81. ## Marketing

Which of the following statements best describes the modern view of marketing?

82. ## Physics

#1. Ten Christmas lights are connected in series and plugged into a 120 V wall outlet. Each light is identical and can be thought of as a resistor. a) What should the value of this resistance be if the total string is to dissipate 50 W? b) How much power

83. ## poetry

What is the theme presented in the poem: "You are reading this too fast," by Ken Norris?

84. ## Accounting

It is stand accounting procedures, or GAAP, to make an adjusting entry to remove the current year’s principle from the long-term liabilities. This entry reduces the long-term liabilities and increases the current liabilities. You are the bookkeeper for

85. ## Physics

A simple camera telephoto lens consists of two lenses. The objective lens has a focal length f1 = +41.7 cm. Precisely 36.1 cm behind this lens is a concave lens with a focal length f2 = -13.9 cm. The object to be photographed is 4.06 m in front of the

86. ## chemistry

draw a lewis structure for a resonance form of ClO2- showing the lowest possible formal charges and give the oxidation numbers of the atoms

87. ## physics

While exploring a cave, a spelunker starts at the entrance and moves the following distances: 75.0 m north, 275 m east, 215 m at an angle 30.0° north of east, and 150 m south. Find the resultant displacement from the cave entrance.

88. ## college physics

A point (labelled P in the figure) is attached to the rim of a disk of radius 0.2 m, which can turn around an axis through its center. It is rotating counterclockwise with a speed of 2.5 m/s. Can someone please help me solve this equation step by step?

89. ## physics !!

A jogger travels a route that has two parts. The first is a displacement A of 2.95 km due south, and the second involves a displacement B that points due east. If the resultant displacement A+B has magnitude 4.13 km, what is the magnitude of B? Im not sure

90. ## physics

A brick is thrown upward from the top of a building at an angle of 25° to the horizontal and with an initial speed of 17 m/s. If the brick is in flight for 2.5 s, how tall is the building?

91. ## Chemistry

How many calories are required at 0 degrees Celsius to melt an ice cube with a mass of 25 g? Explain in detail. I don't understand.

92. ## Chemistry

How many grams of iron are there in a sample of Fe3O4 which weighs 8.338 g?

93. ## Physics

The drawing shows a large cube (mass = 27 kg) being accelerated across a horizontal frictionless surface by a horizontal force vector P . A small cube (mass = 4.0 kg) is in contact with the front surface of the large cube and will slide downward unless

94. ## Physics

#1. Ten Christmas lights are connected in series and plugged into a 120 V wall outlet. Each light is identical and can be thought of as a resistor. a) What should the value of this resistance be if the total string is to dissipate 50 W? b) How much power

95. ## Physics

In moving a 35.0 kg desk from one side of a classroom to the other, a professor finds that a horizontal force of 300 N is necessary to set the desk in motion, and a force of 185 N is necessary to keep it in motion at a constant speed. (a) What is the

96. ## Chemistry

The pressure of 6.0 L of an ideal gas in a flexible container is decreased to one-eighth of its original pressure, and its absolute temperature is decreased to one-seventh of the original. What is the final volume of the gas?

97. ## Physics

A brass lid screws tightly onto a glass jar at 20 oC. To help open the jar, it can be placed into a bath of hot water. After this treatment, the temperature of the lid and the jar are both 60 oC. The inside diameter of the lid is 8.0 cm at 20 oC. Find the

98. ## Physics

A frog with a mass of .14kg jumps by extending its legs 13.5cm, starting from rest in a time period of 112ms. What is the acceleration of the frog while it jumps?

99. ## Physics

A 6.0 kg block,starting from rest, slides down a frictionless incline of length 2.0 m. When it arrives at the bottom of the incline its speed is vf. At what distance from the top of the incline is the speed of the block .5 vf

100. ## chemistry

You mix 2.0 mL of 0.50 M Cu(NO3)2 with 5.0 mL of 0.50 M KI, and collect and dry the CuI precipitate. Calculate the following: a) Moles of Cu(NO3)2 used b) Moles of KI used c) Moles of CuI precipitate expected from Cu(NO3)2 d) Moles of CuI precipitate

101. ## college

After you work out at the gym on a stationary bike for 43.0 minutes, the distance guage indicated that you have traveled 14.8 miles. What was your rate in km/hr?

102. ## chemistry

a. How many atoms of hydrogen are in 25.0 g of ammonia (NH3)? Use the format 6.02E+23 for 6.02 x 10^23 b. How many atoms of nitrogen are in the same amount of ammonia I know to find the number of atoms in a gram of a sample you must multiply by 6.02*10^23.

103. ## Marketing

· Write a 1,050- to 1,400-word paper in which you identify the environmental factors that affect global and domestic marketing decisions. Address the following as they relate to the organization’s marketing decisions o Analyze the influence of global

104. ## physics

A 5.10 kg box is sliding across the horizontal floor of an elevator. The coefficient of kinetic friction between the box and the floor is 0.450. Determine the kinetic frictional force that acts on the box for each of the following cases. (a) The elevator

105. ## 12th grade Math - word problems

#1.) The population of bacteria after t hours is given by P(t) = 500/(1+83.33e^-0.162t) a.) What is the initial population? b.) When will the amount of bacteria in the population be 12? #2.) Which investment yields the greater amount after 4 years? a.)

106. ## chemistry

Water (2690 ) is heated until it just begins to boil. If the water absorbs 5.29×105 of heat in the process, what was the initial temperature of the water?express answer in Celsius.

107. ## Biology

Matching: Predation, Competition. Red tailed hawks and black racer snakes prey on the same species of rodents in the same habitat. White tailed deer eat tree leaves. Match and explain why.

108. ## stats

Using the 68-95-99.7 rule: Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first… a. Percentage of

109. ## Statistics

The heights in inches of 14 randomly selected adult males in LA are listed as: 71, 67, 70, 59, 71, 68, 67, 71, 80, 68, 74, 69, 72, 68. 1. Display the data in a stem-and-leaf plot. 2. Find the mean. 3. Find the median. 4. Find the mode. 5. Find the range.

110. ## science

animals need what to get rid of body waste?

How long must a ladder be to reach the top of a 20' wall if the ladder and the wall form a 32 angle (at the top)?

112. ## Chemistry

The Specific Gravity of kerosene is 0.786/ What is the volume occupied by 7.75kg of kerosene?

113. ## physics

The fastest major league pitcher throws a ball at 40.0. If he throws the ball horizontally, how far does it drop vertically on the 17.7 trip to home plate?

114. ## Math

A basketball player hits 90% of his shots. What is the probability tat he makes the next 3 shots?

115. ## ethics

What is virtue and how do we acquire it? this is according to aristotle

116. ## Algebra

John wants to build a corral next to his barn. He has 300 feet of fencing to enclose three sides of his rectangular yard. a. What is the largest area that can be enclosed? b. What dimensions will result in the largest yard?

117. ## Physics

A student sees a flowerpot pass his 2m high window on the fourth floor in 0.093 seconds. The distance between floors is 4.0m. From which floor did the pot fall?

118. ## math

The sum of my two digits is 13. I am not divisible by 2. List all possible numbers I could be.

119. ## Physics

A cable is lifting a construction worker and a crate, as the drawing shows. The weights of the worker and crate are 961 and 1540 N, respectively. The acceleration of the cable is 0.620 m/s2, upward. (a) What is the tension in the cable below the worker?

120. ## Science

How many neutrons in actinium?

121. ## college

what will be the final temperature if a 5.00-g block of aluminum at 37.0 celsius gives off 25.0 J of heat to its surroundings?

122. ## Physics

What is the period of the minute hand of a clock?

123. ## Clothing and textiles

What does Disposing Fullness means?

124. ## chemistry

A 0.4272-g sample of a potassium hydroxide – lithium hydroxide mixture requires 26.94mL of 0.3385M for its titration to the equivalence point. What is the mass percent lithium hydroxide in this mixture?

125. ## chemistry

what is the mass of 1 mole of carbon dioxide (CO2), and silicon dioxide (SIO2)?

126. ## Physics

Two boats are heading away from shore. Boat 1 heads due north at a speed of 3.7 m/s relative to the shore. Relative to boat 1, boat 2 is moving 35° north of east at a speed of 1.3 m/s. A passenger on boat 2 walks due east across the deck at a speed of 1.2

127. ## physics

A 1500 kg automobile travels at a speed of 105 km/h along a straight concrete highway. Faced with an emergency situation, the driver jams on the brakes, and the car skids to a stop. (a) What will be the car's stopping distance for dry pavement (µ = 0.85)?

128. ## Chemistry

what is the lewis structure with lowest formal charges and label the charge of each atom in NO

129. ## chemistry

f 89 of heat are added to a pure gold coin with a mass of 15 , what is its temperature change? Specific heat capacity of gold is 0.128 .

130. ## chemistry

How many grams of NH3 will have the same number of molecules as 15.0 grams of C6H6?

131. ## physics

A beam of negligible mass of length 3 m is suspended by a string attached to a wall such that the angle between beam and string is 30 degree, and the beam is held horizontal with a sky weight. Find the tension in the string? Find the compression force on

Simplify the expression. 3 [ (15 - 3)^2 / 4] a. 36 b. 108 c. 18 d. 9

133. ## macroeconomics

what happens to the net public debt if the federal government operates next year with a : budget deficit, balanced budget, budget surplus

134. ## Math

Use the simplex method to find the maximum value of P = 3x + 3y subject to these constraints: 3x + 2y ≤ 360 x - y ≤ 60 y ≤ 120 x ≥ 0, y ≥ 0 What is the maximum value of P? What is the corner point which maximizes the profit? x = ? y = ?

135. ## History

what are some similarities and differences between these three mediums: propaganda, advertising and bias? What tricks do you feel are frequently used in propaganda? Why?

136. ## science

a nickel is about 2 millimeters thick,or 2/1,000 of a metter. how many nanometers is?

137. ## physics

The acceleration due to gravity on planet X is one fifth that on the surface of the earth. If it takes 3.5 s for an object to fall a certain distance from rest on earth, how long would it take to fall the same distance on planet X? Answer in units of s.

138. ## physic

Wheel A of radius ra = 6.1 cm is coupled by belt B to wheel C of radius rc = 33.3 cm. Wheel A increases its angular speed from rest at time t = 0 s at a uniform rate of 7.1 rad/s2. At what time will wheel C reach a rotational speed of 119.3 rev/min,

139. ## college physics

In the drawing, the weight of the block on the table is 478 N and that of the hanging block is 195 N. Ignore all frictional effects, and assuming the pulley to be massless. (a) Find the acceleration of the two blocks. (b) Find the tension in the cord.

140. ## Aberdeen

A model rocket is launched straight upward with an initial speed of 40.0 m/s. It accelerates with a constant upward acceleration of 2.50 m/s2 until its engines stop at an altitude of 120 m.

141. ## nath

the graph shows the annual heart attack rate per 10,000 men as a function of blood cholesterol level . Use the graph to approximate the annual heart attack rate per 10,000 men for those whose blood cholesterol level is 250mg/dl.

142. ## math

determine whether the correspondence is a function . Detroit ---lions,tigers,pistons. New York---rangers, jet, yankees. Is this correpondance a function.

143. ## math

Pretend the program in Senegal had been reducing infant mortality at a rate of 11 % per year. How long would it take for infant mortality to be reduced by 35 %? How do I go about solving this problem?

144. ## Physics

A monkey is chained to a stake in the ground. The stake is 2.81 m from a vertical pole, and the chain is 3.61 m long. How high can the monkey climb up the pole?

145. ## language

what is the difference between the -s at the tropics and the -s at the end of needs

146. ## Calculus

Determine how much time, to the nearest tenth of a year, is required for an investment to triple in value if interest is earned at the rate of 3.5% compounded continuously. (use A=Pe^rt

147. ## Math

Rewrite rational exponent 3sqrt22

148. ## Chemistry

The Specific Gravity of kerosene is 0.786. What is the volume occupied by 7.75kg of kerosene? Is it 7.75/0.786?

149. ## statistics

A coin is weighted in such a way that a tail is twice as likely to occur as a head. If the coin is tossed twice, what is the probability of obtaining two tails?

150. ## physic

Wheel A of radius ra = 6.1 cm is coupled by belt B to wheel C of radius rc = 33.3 cm. Wheel A increases its angular speed from rest at time t = 0 s at a uniform rate of 7.1 rad/s2. At what time will wheel C reach a rotational speed of 119.3 rev/min,

151. ## SCIENCE!!

a. Find the speed required to throw a ball straight up and have it return 6 seconds later. Neglect air resistance. b. How high does the ball go? Please Help!! Thanks!! :)

152. ## Chemistry

What is the molecular, ionic and net ionic formula for Acetic acid and sodium nitrate Molecular: Ionic: Net Ionic:

153. ## science

what is the definition of a compound machine?

154. ## english

what is the complete verb phrase? and helping verb? Who has been doing research on early polar flights? Is it has research? I can not include any of the words that may separate the parts of the verb phrase

155. ## Algebra Alley(MATH)

Triangles ABC and RST are similar triangles. Angle A=2(x+15)^0 angle S=3x^0,and angle C=x^0. What are the measures of angles B,R,and T? What kind of triangles are they?

156. ## college physics

A 5.10 kg box is sliding across the horizontal floor of an elevator. The coefficient of kinetic friction between the box and the floor is 0.450. Determine the kinetic frictional force that acts on the box for each of the following cases. (a) The elevator

157. ## math

Maximize P = 4x + 20y subject to these constraints: 2x + 15y ≤ 700 5x + 10y ≤ 1150 5x + 5y ≤ 1000 4x + 15y ≤ 980 x ≥ 0, y ≥ 0 Maximum value for P = ?. This value of P occurs when x = ? and y = ? If u1, u2, u3, and u4 represent the slack

158. ## medicine

The concentration of Lasix is 5%. How many milligrams are in 0.5ml?

If m

160. ## mgmt 303

some people have claimed that the increasing technological sophistication required by many of today's corporations has led to a return to job specialization.

161. ## physics

Consider the position of a ball thrown down with an initial speed of 18 m/s. What will be its position after 2.8 s? Let the initial position be 0. The acceleration of gravity is 9.8 m/s2. Answer in units of m

162. ## Chemistry - v/v versus w/w

Thanks a lot:) So just to confirm: normally for any chemical bought from manufacturer, if it is not stated, the % usually means v/v? Seems like for conc sulphuric acid, when it is stated 97% sulphuric acid, it means 97% w/w sulphuric acid? Thank you very

163. ## Physics

Part a of the drawing shows a bucket of water suspended from the pulley of a well; the tension in the rope is 92.5 N. Part b shows the same bucket of water being pulled up from the well at a constant velocity. What is the tension in the rope in part b?

164. ## Physics - Power Law Data Analysis

In an experiment, two variable quantities, x and y were measured. The relation between x and y is thought to be: y= 4(pi)b(x)^3 x(cm) +/- 0.02cm 0.67 0.80 0.90 0.95 y(g) +/- 0.25g 2.25 4.00 5.52 6.60 a) Draw a complete table that allows you to plot the

165. ## Chemistry

What is the difference between a group and a period in the periodic table? A: The difference between a group and a period in the periodic table is that a group is each column/family with similar properties and a period is each row going up from charges 1+.

166. ## Linear Programming

Maximize P = 16x + 80y subject to these constraints: 2x + 20y ≤ 430 4x + 70y ≤ 1400 8x + 30y ≤ 980 10x + 10y ≤ 1000 4x + 30y ≤ 700 x ≥ 0, y ≥ 0 Maximum value for P = ?. This value of P occurs when x = ? and y = ? If u1, u2, u3, u4, and u5

167. ## geometry

radius of 3960 miles cause there 5280 feet find length in feet by circumference of earth use ~3.14

168. ## Math

The corners of a square lie on a circle of diameter 0.33 m. Each side of the square has length L. Find L.

169. ## Chemistry

I like to write and name chemical formulas, but some formulas just confused me really bad, so I would like help getting back on track. I don't understand this. NiPO4: I know that Ni = Nickel, and PO4 = Phosphate, but how come there isn't the -3 charge on

170. ## Calc Repost

Express the function in the form f o g. G(x)= The cube root of (x/1+x) So, (f 0 g)(x)= f(g(x))= f(cube root of x/1+x)= I don't know how to finish the problem because it does not give you the information for F(x)???

171. ## physics

a pendulum of length L=9.8m hangs in equilibrium and is then given velocity v=0.2m/s at its lowest point.What is the magnitude of the subsequent oscillation?

172. ## Chemistry

I'll try to explain better, and will try to include a url. Examine the drawings in fig 11. What types of particles are modelled in each drawing? A) There are three individual cubes in that figure, they are all the same colour which is red. By individual I

173. ## Re: social studys

Im the girl qho just asked about my 2-3 page essay. Its based on this "explain and describe how geographers use thier tools to interpret geographic questions. Remember, i'm in 7th grade. (ms.sue) my teacher said that its based on out notes and its

174. ## History

Could someone explain what social, economic, and political issues are? Social- would be among the people? Economic- Political- issues that have to do w/ gov?

175. ## chemistry problem

A carbon nucleus has six protons and six neutrons. How many electrons would it take to equal the mass of a carbon nucleus? ok. i think theres some type of formula or some trick to figure this one out but i don't know what it is. If you guys know how to

176. ## algebra 1

in the equation below, y is a function of x. y = 4x + 8 if the value of x isdecreased by 3, how will the value of y change?

GRUMBLE-EXPLOTE-LANGUAGES-MUMBLED-STREAK-STUBBORN-DARTED Jack was so upset he could not stand still. He____________ from room to room looking for his spanish textbook.

178. ## physics

We use many chemicals in our daily lives. How can these chemicals affect you and what can you do to minimize these effects? The chemical industry is enormous in the industrialized world. How has society benefitted from advances in the chemical industry?

When the shuttle bus comes to a sudden stop to avoid hitting a dog, it decelerates uniformly at 3.8 m/s2 as it slows from 8.8 m/s to 0 m/s. Find the time interval of acceleration for the bus. Answer in units of s.

180. ## math

in 1920 the record for a certain race was 46.4 sec. In 1960 it was 45.6 sec. Let R(t)=the record in the race and t= the number of years since 1920. a. find a linear function that fits the data. b. Use the function in (a) to predict the record in 2003 and

181. ## college physics

A swimmer is heading straight for the other shore of a river with a velocity of vs=0.7 m/s relative to the water, but is carried away by the current, which has a velocity of vr=0.3 m/s. It takes her 20.3 s to get across. How far downstream does she end up?

182. ## statistics

P(A)=.37, P(B)=.19, P(A and B)=.13. What is the probability that A doesn't occur or B does?

183. ## math

Adam is 3 times as old as Cynthia and Fred is 16 years younger than Adam. One year ago, Adam's age was twice the sum of Cynthia's and Fred's age. Find their present age. I have a answer already but I still not get it,please help me out with answer

184. ## physics

how would you calculate altitude given airspeed, rate of descent and time? I'm trying to find the change in altitude

185. ## physics

two notes wich have frequency ratio 2:1 are said to be separated by an octave.A frequency wich is separated by an octave from middle C(256Hz) is?

186. ## Algebra

A certain can of iced tea contains 4% of the recommended daily allowance of sodium. The recommended daily allowance is 2500 milligrams. How many milligrams of sodium are in the can of iced tea?

187. ## SCIENCE!!

a. When a ball is thrown straight up, by how much does the speed decrease each second? b. After the ball reaches the top and begins its return back down, by how much does its speed increase each second? c. Compare the times going up and coming down. Please

188. ## Physics

Absolute temperature is proportional to the average kinetic energy of the atoms. True or false?

A box is sliding up an incline that makes an angle of 16.0° with respect to the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.180. The initial speed of the box at the bottom of the incline is 1.30m/s.

190. ## Physics

A simple camera telephoto lens consists of two lenses. The objective lens has a focal length f1 = +41.7 cm. Precisely 36.1 cm behind this lens is a concave lens with a focal length f2 = -13.9 cm. The object to be photographed is 4.06 m in front of the

191. ## chemistry

write the lewis structure for dinitrogen oxide. include the 2 resonance structures and formal charges where appropriate.

192. ## marketing

is the process of naming broad product-markets and then segmenting these broad product-markets in order to select target markets and develop suitable marketing mixes. A. Mass marketing B. Market segmentation C. Diversification D. Market positioning

193. ## Math

Describe the figure or polygon produced by interpreting the symbol {8/4}

194. ## algebra 2

to which set of numbers does each number belong? -79

195. ## math

Maximize P = 4x + 20y subject to these constraints: 2x + 15y ≤ 700 5x + 10y ≤ 1150 5x + 5y ≤ 1000 4x + 15y ≤ 980 x ≥ 0, y ≥ 0 Maximum value for P = ?. This value of P occurs when x = ? and y = ? If u1, u2, u3, and u4 represent the slack

197. ## math

find the linear function f(x)=mx +b, whose graph has the given slope and y-intercept slope is -13/9 and y-intercept is (0.-6) the linear function is f(x)=

198. ## Chemistry

Examine the drawings in fig 11. What types of particles are modelled in each drawing? a) There are 3 red cubes in this drawing. (I don't understand what they mean by particles. Do they mean label the drawings as element, compound,?)

199. ## Math

Tom has some cubes that are 2 cm. on each side. How many of them will fit into a box that is a cube with each side 4 cm. long?

200. ## geometry

If three time the supplement of an < is subtracted from seven times the comp. of the

201. ## physics

What happens when the frequency of a force applied to a system matches the natural frequency of vibration of the system

write each number as the product of prime factors. (a) 42__________________ (b) 110_________________ (c)...__________________ (d)...__________________ .... ....

203. ## Biology

Covalent bonds between nucleotides in DNA are found between: A) a phosphate group and a nitrogenous base. B) a sugar and a nitrogenous base. C) nitrogenous bases. D) phosphate groups. E) a sugar and a phosphate group. Thank you.

204. ## Statistics

The amt of time cold sufferes will experience symptoms is normally distributed wiht a mean of 7.5 days and a standard deviation of 1.2 days what proportion of sufferers will experience in LESS THAN 4 days , also what proportion will experience sympotms for

analyze the responses to the spread of buddhism in china

206. ## science

Which would be most appropriate to measure the mass of my pet panda in? a. kilograms b. centigrams c. Gigagrams d. milligrams its kilograms??????

207. ## english

How can I fix this sentence? If I knew that the caring journal would be due on September 27, I would try to finish it on the fourth week.

208. ## algebra 2

compare each pair of numbers. Use < or > o.45,0.405

209. ## chemistry

How many {\rm NO}_{2} molecules would form as products if the reaction had a percent yield of 75\%?

210. ## Chemistry

The Specific Gravity of kerosene is 0.786. What is the volume occupied by 7.75kg of kerosene? Is it 7.75/0.786?

211. ## SCIENCE!!

a. When a ball is thrown straight up, by how much does the speed decrease each second? b. After the ball reaches the top and begins its return back down, by how much does its speed increase each second? c. Compare the times going up and coming down. Please

212. ## Calculus

The manager of a weekend flea market knows from past experience that if he charges x dollars for a rental space at the market, then the number y of spaces he can rent is given by the equation y= 200-4x. Is this correct? Slope represents the relationship

213. ## math

Fill in the correct math operations only once (+, -, *, /) 8_2_1_3_4=5

214. ## english

How do i make this a stronger thesis statement? There are many circumstances that effect the actions of fictional characters.

215. ## Math

a disc jockey must play 14 commercial spots during 1 hour of a radio show.Each commercial is either 30 seconds or 60 seconds long. If the total commercial time during 1 hour is 11 min, how many 30-second commercials were played that hour. How many

216. ## calculus

a right circular cylinder has a volume 600cubic cm. if it costs $2 for the material needed to make the top and bottom and$3 for the material needed to make the sides, what is the radius and height of the cylinder that would cost the least?

217. ## geography

What part of a map tells the relationship of distance shown on the map to real distance on the Earth?

218. ## Chemistry

This is not a homework question, I'm just asking this casually. Is the metal Silver a good conductor of electricity?

219. ## Chemistry problem

I refer to my earlier post on v/v versus w/w. I would be very grateful for any advice provided. For 95% ethanol purchased from manufacturer, we normally take it as 95%v/v. For 98% sulphuric acid, it seems like it is normally 98% w/w. I have also seen a

220. ## Physics

A particle has ⃗r(0) = (4 m)j and ⃗v(0) = (2 m/s)i. If its acceleration is constant and given by ⃗a = −(2 m/s2) (i +j), at what time t does the particle first cross the x axis? Answer in units of s. part 2. At what time t is the particle moving

Helium is monatomic with a relative atomic mass of 4. calculate (i) the density of helium gas at a temperature of 0 degrees Celsius and a pressure of 101kPa and (ii) the rms speed of the helium atoms under these conditions

mary's birthday is between june 13 and june 23. the date of her birthday is not an even number. the sum of the digits is 3. when is mary's birthday?

223. ## Physics - Inelastic Collisions

The speed of a pitched baseball is 46.0m/s. You want to know how fast is your school's star baseball pitcher could throw. You make a pendulum with a rope and a small box lined with a thick layer of soft clay, so that the baseball would stick to the inside

how to work out the percentage of a triangle that is shaded by a circle?? (circle is at a tangent to all 3 sided if that helps) thanks

274. ## Chemistry

A solution containing 42 of per 100.0 of water is cooled from 60 to 0 . What will happen during cooling?

275. ## physics

A model rocket is propelled upward by a cylinder of compressed water. The cylinder emits water at a rate of 0.050 kg/second with an exit speed of 80.0 m/s. Initially, the rocket has a mass of 0.15 kg, including the water cylinder. What is the rocket's

276. ## physics

A box is sliding down a ramp sloping 25° above the horizontal. The coefficient of kinetic friction is 0.15. What is the acceleration? The answer is 2.8 m/s^2. How can this be solved with out mass?

277. ## macroeconomics

match each of the rationales for finacial intermediation listed below with at least one of the following: insurance company, pension fund, savings bank. a. adverse selection b. moral hazard c. lower managment cost generated by larger scale

278. ## Math

BW made c cookies to divide evenly amoung O,TS,SB,and RD and BW himself. Write an algebraic expression that represents the number of cookies each person will receive. I have no clue...sorry those were intitals the problem characters had long names.

279. ## Math

The square root with tha dash and slant thingy is between what two consecutive intergers? Will it be 2&3 or 8&9?

280. ## Microbiology

Utilization of amylase producers is “big business” can you find or think of any uses for the amylase production? [think of the high soda consumption in the U.S., what makes it so sweet?]

281. ## History

The U.S. Treasury department can also be known as the government? like in a more broader sense.

282. ## Biology

In a proper lab report, is first person allowed? Or should I avoid using "I"? Thanks.

283. ## Pre-Calculus

Find the values of x for which the line y=2x intersects the parabola y=(x-1)^2+1. So I set the equations equal to eachother, and solved for x using the quadratic formula. The solution I got was: x=3.41 and x=0.59. Could someone please check my work.

284. ## SCIENCE!!

a. When a ball is thrown straight up, by how much does the speed decrease each second? b. After the ball reaches the top and begins its return back down, by how much does its speed increase each second? c. Compare the times going up and coming down. Please

285. ## English

Thank you for your last corrections. Here are some more sentences I'm not sure of. 1) John was a successful middle class wool dealer. In 1557 his fortunes began to decline and he ran into debts. 2) He was part owner in (?) the most prestigious public

286. ## Math

My question says: Find the exact alue of x for which (4^x)*(5^[4x+3])=(10^[2x+3]) I can't seem to come to a solution. We're reviewing last year's lessons, so change of base and logarithmic expressions are what we're going over right now. Here's what I've

I know I posted this yesterday but I really do not understand this and I did not quite understand the comment on what to do. Find the real solutions of the equation. x = 2 sqrt6x-36

288. ## personal finance concepts

Donna and Sherman Terrel are preparing a budget for 2010. Donna is a systems analyst with an airplane manufacturer, and Sherman is working on a master's degree in educational psychology. The Terrels do not have any children or other dependents. Donna

289. ## compensation and benefits

what can you do to build in strategic compensation into your organization.Use the designation (ABC) company or college to keep anonymity

290. ## world history

Why does Marks begin with China? What was happening there in the 1400s that matters to the course of world history?

291. ## physic

The angular position of a point on the rim of a 45.8 cm rotating wheel is given by θ(t) = 3.6 t2 − 2.8 t +7.5, What is the instantaneous speed v of the point at time t = 6.5 s?

292. ## physics

consider a simple harmonic oscillation with m=0.5kg,k=10N/m and amplitude A=3cm,if the oscillation is released from rest at x=A when the clock is set to t=0,determine the position of the oscillation at t=2s

293. ## Math

Which pattern do you see in the multiples of 9? and Which pattern do you see in the multiples of 1?

294. ## pre-calculus

2y^-3 = 4e^(-x/2)/(1+e(-x/2)) my teacher gave this problem in my chem class and i don't know what he is really asking , does any one have an idea if i have to solve for y or what's going on.. how would this be done..

3 points on a line Q,P,R (In order) if QP =2x and QR =2x+1 and PR =21 Solve for x

296. ## University Research-level Biology

Hello, this is an upper-level question, and I would sincerely appreciate help before Tuesday. I am reading a journal article, and there is one conclusion in it that I do not understand. It predicts a postsynaptic mechanism when EPSP amplitudes do not vary

297. ## math 8

what is the meaning of order if y=x is to the order of 1 then what is the order for y=sin x ANSWER: is that also the order of one please explain.

298. ## Physics

On a supermarket parking lot, a car is pulling out and bumping into an oncoming car. The car pulls out with 0.8 m/s, while the oncoming car has a speed of 1.4 m/s. The angle between the velocities is 24 degrees, as indicated in the figure. What is the

299. ## math

x.y=30 and x+y=10.3, I end up with x=(21.83+60.66i)/(-5.15-5.89i). i is the square root of (-1). could you please show me how this equation will = 10.3 I am having problem to figure it out. thank you.

300. ## chemistry

Time p.m. Mass (g) 1:00 2.5754 1:08 2.5621 1:15 2.5615 1:24 2.5609 1:31 ? How do I predict the mass at 1:31 of this solid that is weighed every 5 minutes while drying?

Lola excercises m minutes per day 5 days a week. Write an alegrabic expression that represents how many minutes '50' excercises in two weeks. Could the answer be 50c because it feels like I'm missing something.HELP

302. ## physics

How much force must a weight lifter apply to a 97 kg barbell to accelerate it upward from rest a distance of 85cm in 3.0 secs? Step by step instructions if possible please. I really need help.

303. ## chemistry

Solid magnesium metal reacts with chlorine gas according to the following equation: Mg + Cl2 --> MgCl2 What mass of magnesium chloride is formed in the reaction between 7 g of Mg and 13.2 g of Cl2 I got 7/24.3= .288 13.2/70.90= 1.861777 thats as far as i

304. ## word search puzzle

moving about in a clumsy, noisy way

305. ## AED 222

Can anyone please help me on this. I am having trouble trying to figure out what to write. Use the infromation you gathered throughout the course to distinguish what you think is the greatest strength and the greatest weakness of the current special

306. ## Physics

Dini is riding her bike eastward at a constant 9.5 m/s when a car pulls out of a side street a short distance in front of her. Dini applies her brakes and manages to stop in 2.5 s, just in time to avoid running into the car. Calculate Dini's average

307. ## algebra

-5+10y=neg30 what is the anser?

308. ## History

what are some similarities an differences between these three mediums: propaganda, advertising and bias? What tricks do you feel are frequently used in propaganda? Why?

309. ## Bio

Covalent bonds between nucleotides in DNA are found between: A) a phosphate group and a nitrogenous base. B) a sugar and a nitrogenous base. C) nitrogenous bases. D) phosphate groups. E) a sugar and a phosphate group.

311. ## Language Arts

My daughter is writing a paper on her 3 favorite things about fall. She has chosen Halloween, Volleyball and Football. She is having a hard time with the introduction of it. Any ideas?

312. ## medicine

A 8 lb rabbit needs 300ug/kg of a 1% solution. How many ml should be given

313. ## English

What is the subject covered in the encyclopedia with the call number 150 ENC? Please Help :P Thanks!! :))

314. ## US History: WWI

Why would this poster "Joan of Arc Saved France: Women of America, Save Your Country/Buy War Savings Stamps," if a propaganda poster? I don't understand. It's not misleading information.

315. ## math

x=(-5.15-5.89i)+(30/(-5.15-5.89i)) i is the square root of (-1) the answer sholud equal 10.3 x=10.3 but could you show me how , i am having problem to figure it out. thank you.

316. ## math

solve the equation 9(x-4)+x=10(x-4)+4

A rational number is ____ a real number. a. always b. never c. sometimes its always ???????

What is subject and verb of this sentence...The rest of story was never told.

320. ## History

When US entered WWI, what century would that be? 20th century?

what is the mening of trade agreements of germany and their proximity to trade partners. please and thank you.

322. ## Chemistry

Can some explain how I can determine if a substance has ion-dipole, dipole-dipole, ion-ion or london dispersion forces? I'm really confused and have a test soon please help!

323. ## Math

Fantasia bought 15 new books to add to her collection of book 'b'. 2rite an algebraic expression that represents the total number of books in Fantasia's collection now. Will it 15b or 15+b or its other and if so may you explain:)

324. ## physical

Only two horizontal forces act on a 3.0 kg body that can move over a frictionless floor. One force is 9.0 N, acting due east, and the other is 6.9 N, acting 54° north of west. What is the magnitude of the body's acceleration?

325. ## Math

is a number with the most digits always greater?

326. ## science weather

would you expect to find a greater variety of climates on a hill at 11degreesN or at 65degreesN? whyyy? :)

my project is to complete the October calendar, using the following variables in algebric expression to represent each day in the month. Each expression must include all four variable using each variable exactly one. a=1 b=2 c=3 d=4

2(5-3x)

329. ## trig

sinL=6/7 L(alfa)=?

330. ## science

how can you tell the easiest way if something is a chemical change or physical change.

what is the antomns for pledge

332. ## Math 11

for f(x)= squareroot x to h(x)= f(-3x-12) sketch thegraph.... when i did this i did h(x)= f(-3(x+4)) you know the negitve 3 isit reflection on the x ais or the y axis... thank you!!!

333. ## Math

Tom has some cubes that are 2 cm. on each side. How many of them will fit into a box that is a cube with each side 4 cm. long?

334. ## physics

The angular position of a point on the rim of a 45.8 cm rotating wheel is given by θ(t) = 3.6 t2 − 2.8 t +7.5, where θ is measured in radians and t is measured in seconds. What is the instantaneous speed v of the point at time t = 6.5 s?

335. ## math

my friend asked me how to do this probelm and i could not figure it out for the live of me. its simple im pretty sure. (6-5i)/(6+5i) I tried using the conjugate method and my answer did not come out correct. can you please answer this?

There are more earthquakes along the western coast of the United States than along the eastern coast. Explain

Add two prepositional phrases to this sentence. Can you help me find something that makes sense for the second half of the sentence. Thank You. The singer impressed her audience. The singer beside the stage impressed ________ her audience.

338. ## math

solve the equation and check -(9x-4)-(2x-6)+7=-8(x-9)-(6x+2)+4

396. ## math

if x.y=30 and x+y=10.3 what is x ?

397. ## algebra 2

3t(t+2)-(3t+5t) for t=19

8-1/2x=3