# Questions Asked onMarch 18, 2013

1. ## ....

hans uses a wheelchair. although he has a ramp to get in his house he finds it difficult to get his wheelchair up the ramp. which modification would make it easier for hans to get in his house? a. increase the length of the ram b. increase friction between

2. ## ....

in the digestive tract, mouth is to bolus as a. stomach is to chyme b. gallbladder is to insulin c. small intestine is t carbohydrates d. esophagus is to peristalsis

3. ## Cultural Anthropology

In a band society, who would most likely be responsible for punishing a murderer

4. ## science

in the digestive tract, mouth is bolus to a. stomach is to chyme b. gallbladder is to insulin c. small intestine is to carbohydrate d. esophagus is to peristalsis

5. ## Chemistry

Calculate the pH at the equivalence point for the titration of 0.130M methalamine (CH3NH2) with 0.13M Hcl. The Kb of methyl amine is 5.0x10-4.

6. ## Chemistry (reposting)

In which of the following solution would CaC2O4 have the highest molar solubility? Please help. A) 0.01 M NaCl B) 0.01 M H2C2O4 C) 0.01 M Na2C2O4 D) 0.01 M NaHC2O4 E) 0.01 M HCl I think it is E because it is a strong acid and will completely dissociate

7. ## Quantum Physics

a) What is QFT6 of 1/√2(|0>+|3>)? b) What is QFT6 of 1/√2(|1>+|4>)? c) What is QFT6 of 1/√3(|0>+|2>+|4>)? d) What is QFT6 of 1/√3(|1>+|3>+|5>)? Answer like: a) |0> = ; |1> = ; |2> = ; |3> = ; |4> = ; |5> = ...

8. ## science

a man wishes to swin across a river 600 m wide. If can swim at the rate of 4 km/hr in still water and the river flows at 2 km/hr. Then in what direction must he swim to reach a point exactly opposite to the starting point bnd when will he reach it ?

9. ## statistics

The time to fly between New York City and Chicago is uniformly distributed with a minimum of 120 minutes and a maximum of 150 minutes. What is the standard deviation?

10. ## Chemistry

Calculate the molar concentration of uncomplexed Zn2+ (aq) in a solution that contains 0.22 mol of Zn(NH3)4 2+ per liter and 0.3109 M NH3 at equilibrium. Kf for Zn(NH3)4 2+ is 2.9 X 10^9 I started this way... (0.3109 + 4)2/0.22-x)= 2.9 X 10^9

11. ## maths-surface area

A cone 7dm high and 6 dm in diameter is placed on the ground. Sand is poured over it until conical heap 21 dm high and 33 dm circumference at the bottom is formed. Find how many m^3 of sand is there?

12. ## physics

A spherical bowling ball with mass m = 4.1 kg and radius R = 0.116 m is thrown down the lane with an initial speed of v = 8.9 m/s. The coefficient of kinetic friction between the sliding ball and the ground is ¦Ì = 0.34. Once the ball begins to roll

13. ## math

a right triangle has an acute angle(theta) suck that cot(theta)=15. find cos(theta)

14. ## alg 1

the length of a rectangular garden is 8 feet longer than the width. The garden is surrounded by a 4-foot sidewalk. the sidewalk has an area of 320 square feet. find the dimensions of the garden. please help

15. ## help?

find the altitude of an equilateral triangle if a side is 6 mm long.

16. ## English

The team ______ won the game is my favorite. which word correctly completes the sentence above? a. which b.whom c. who d. that

17. ## stats.

The GMAT test is required for admission to most graduate programs in business. In a recent year, the GMAT test scores were normally distributed with a mean of 550 and standard deviation of 100. A. Find the first quartile for the distribution of GMAT

18. ## Chemistry

A reaction mixture of 4.0 mL of 0.002 M SCN- and 5.0 mL of 0.002 M Fe3+ is diluted to 10.0 mL with 0.1 M HNO3 to form the blood-red FeNCS2+ complex. The equilibrium molar concentration of the FeNCS2+ determined from a standardization curve is 1.5x10^-4

19. ## math

A community college has 2,000 students and 50 instructors. Next year the enrollment will be 6,000. How many new instructors should be hired if the college wants to keep the same studentto instructor ratio?

20. ## Algebra

You roll a pair of number cubes and then flip a coin. Is this an example of independent or dependent events? A.independent B.dependent This is A...right?

21. ## math

a species of orchid is being studied. The population 'p' at time 't' years after the study started is assumed to be p = 2800ae^0.2t/1 + ae^0.2t where 'a' is a constant. Given tnat there were 300 orchids when the study started. a. show that a =0.12 b. use

22. ## English

hans uses a wheelchair. although he has a ramp to get in his house, he finds it difficult to get his wheelchair chair up the ramp. which modification would make it easier for hans to get in his house? a. increase the length of the ramp b. increase the

23. ## math

How do I do this? Without a calculator, determine two angles between 0 degrees and 360 degrees that have a cosine of negative square root 3 over 2.

24. ## math/ratios

There are 77 students in the student council. The ratio of girls to boys is 7:4. How many girls are in the student council?

26. ## math

A bookshop had 60 boxes of pencils. Each box contained 85 pencils. Half of the pencils were packed into packets of 25 pencils and the rest were packed into packets of 20. How many packets of pencils were there altogether? My answer is 229 am i right? How

27. ## maths-surface area

Cylindrical groove 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 cylinder is 3mm and outer diameter

28. ## algebra

an object is launched vertically in the air at 29.4 meters per second from 10 meter tall platform . find its maximum height in seconds and in meters ?

29. ## Chemistry

Solutions of sodium thiosulfate are used to dissolve unexposed AgBr (Ksp = 5.0 10-13) in the developing process for black-and-white film. What mass of AgBr can dissolve in 1.40 L of 0.425 M Na2S2O3? Ag+ reacts with S2O32- to form a complex ion. Ag+(aq) + 2

30. ## Chemistry

How many chlorine atoms are contained in a 1.00 g sample of iron(III) chloride, FeCl3? Use the masses to two decimal places from the chart in the front of your text. Use the format 6.02E23 for 6.02 x 1023, or 6.02E-23 for 6.02 x 10-23,use two decimal

whatever you can do or dream you can, begin it. Boldness has genius, power and magic in it !" describe in 25 word what the author is saying.

32. ## Stats.

The average age of a vehicle registered in the United States is 8 years, or 96 months. Assume the standard deviation is 16 months. If a random sample of a group of 48 vehicles is selected find the probability that the mean of the group’s age is between

33. ## physics

A thin spherical shell of mass M = 2.00 kg is released from rest at the top of an incline of height H=1.31 m and rolls without slipping to the bottom. The ramp is at an angle of θ = 24.1o to the horizontal. Calculate the speed of the sphere's CM at the

34. ## Cultural Anthrolpogy

Anthropological research has demonstrated that supernatural beings and forces exist in what percentage of the world's cultures? A. 50 percent B. 80 percent C. 95 percent D. 100 percent My answer: C

35. ## Ýndustrial Engineering

The figure shows the paths of a golf ball your friend drops from the window of her apartment and of the rock you throw from the ground at the same instant. The rock and the ball collide at x = 41.00 m, y = 17.02 m, and t = 2.94 s. If the ball was dropped

36. ## Accounting 202

Tse does not want to give Towry this budget without making constructive suggestions for steps Towry could take to improve expected performance. Write a memo to Towry outlining your suggestions.

37. ## geometry

find the perimeter of the rectangle if the area is 6m+3m

38. ## Physics

A 10 g bullet is fired horizontally into a 1 kg block of wood hanging from a 1 m long string attached to the ceiling, getting stuck in the block. Due to the impact, the block then swings on the string to a maximum angle of 60 degrees with respect to the

78. ## chemistry

Rank the following 3 compounds in terms of increasing boiling point: CCl4, CH4, CH2Cl2 - Rank the following 3 compounds in terms of increasing boiling point: CF4, CH4, CH2F2 - Water, H2O, is a liquid at room temperature. Hydrogen selenide, H2Se, is a

79. ## Geometry

ABC is a right angled triangle with ∠ABC=90∘ and side lengths AB=24 and BC=7. A semicircle is inscribed in ABC, such that the diameter is on AC and it is tangent to AB and BC. If the radius of the semicircle is an improper fraction of the form a/b,

80. ## Combinations Maths

25 independent, fair coins are tossed in a row. What is the expected number of consecutive HH pairs? If 6 coin tosses in a row give HHTHHH, the number of consecutive HH pairs is 3.

81. ## Chemistry

I could use some help please. Ammmonia, NH3, can be made by reacting Nitrogen with Hydrogen. N2+3H2=2NH3 How many moles of NH3 can be made if 7.5 moles of H2 react eith enough N2? Thank-you in advance for any help

82. ## Chemistry

Question 2 Marks: 2 How many grams of oxygen gas must react to give 174.3 grams of ZnO according to the balanced equation. 2 Zn(s) + O2(aq) --> 2 ZnO(s)

83. ## math

The total capacity of 2 water bottles, A and B, is 680 ml. The ratio of bottle A's capacity to bottle B's capacity is 4:6. How much larger is bottle B's capacity than bottle A's? My answer is 136, am i right?

84. ## Chemistry

How many grams of silver nitrate must react to give 67.5 grams of Ag according to the balanced equation. Cu(s) + 2 AgNO3(aq) --> Cu(NO3)2(aq) + 2 Ag(s)

85. ## World History (Ms. Sue)

Why was the immediate impact of the emancipation proclamation limited? My answer: The impact was limited because most of the slaves that Lincoln intended to liberate lived in areas distant from the Union troops that could enforce his proclamation?

86. ## Chemistry

How many grams of zinc must react to give 13.0 grams of ZnO according to the balanced equation. 2 Zn(s) + O2(aq) --> 2 ZnO(s)

87. ## math

The time is 5:15. Is the hour hand closer to the 5 or the 6? Why?

88. ## Chemistry

Question 9 Marks: 2 In the reaction: Zn + 2 HCl ZnCl2 + H2 An excess of Zn is reacted with 300.0 g of HCl. How many grams of H2 will be produced?

89. ## Math

Frank has 3 nickels, 5 dimes, and 2 quarters. What is the range, mean, median, and mode of the values of Frank's coins?

90. ## Chemistry

why is it important that the equations be balanced when performing mass-mass stoichiometry problems?

91. ## Mathematic

Haw many meters are in 2.7 kilometers

92. ## Chemistry

What is the mass of iron (g) produced from 227.4 of iron(III) oxide ?

93. ## POLITICAL SCIENCE

describe the European origins of American conservative and liberal ideologies. Then, explain how these two American ideologies have evolved from their European origins, and the key features of each American ideology today. Do “Tea Party” beliefs neatly

94. ## Mathematics

For what values of m and n Does the expression ( mx^4 + nx^3 + 14x^2 + 9x + 2) divided by ( x^2 + 3x + 1 ) leaves a remainder , (-11x - 4 ) .. ? I divided it , nut the whole m and n remainder thingy made me so confused !!!

95. ## Rhts

If 13sinx+5=0 and x[0;270],determine witout the use of a calculator,the value of sin2x

96. ## LAN

1. System A consists of a single ring with 100 stations, one per repeater. System B consists of four 25 stations rings linked by a bridge. If the probability of a link failure is , a repeater failure is , and a bridge failure is , derive an expression for

97. ## algebra 2

how do you find all real zeros of the polynomial function. y=4x+15x -8x-3

98. ## stats.

The mean number of bumped airline passengers per day is 1.35 and the standard deviation is 0.25. For a random selection of a group of 40 days, what is the probability that the mean of bumped passengers for the 40 days will be between 1.25 and 1.50?

99. ## English

1. I am good at computers. 2. I am good with computers. (Are both the same in meaning?) 3. I am good at using computers. 4. I am good with using computers. (Are both the same and grammatical?)

100. ## Propability

Briefly summarize the experimental design for deciding whether a proposed treatment should go on for further study. Note where independence came into play. If you were more conservative and reject the treatment only if the probability that it is 30%

101. ## US History

I have 3 History question that I am completely stuck on. Please help? Thanks Which answer best describes an important outcome of the Gibbons v. Ogden court case? The case set definitions for navigation and placed state control over all coastal and river

102. ## physics

A SUPPOSED TREASURE OF OLD SILVER JEWELRY IS UNCONVERED. a.02M^3 BOX OF THE "OLD JEWELRY" HAS A MASS OF 177KG.IS IT R EALLY OLD SILVER? IF NOT WHAT IS IT?

103. ## geometry

Consider the region in Quadrant 1 totally bounded by the 4 lines: x = 3, x = 9, y = 0, and y = mx (where m is positive). Determine the value of c such that the vertical line x = c bisects the area of that totally bounded region. Needless to say, your first

104. ## Physics

A bungee jumper (m = 66.00 kg) tied to a 39.00 m cord, leaps off a 69.00 m tall bridge. He falls to 5.00 m above the water before the bungee cord pulls him back up. What size impulse is exerted on the bungee jumper while the cord stretches?

105. ## World History (Ms. Sue)

Why did black soldiers often face greater hardships that white soldiers? My answer: They face greater hardships because of the color of their skin. They were often given menial jobs, lower pay, and worked under white officers. They were organized in

106. ## math

There are 77 students in the syudent council. The ratio of girls to boys is 7:4. How many girls are in the student council?

107. ## asap math

The measure of a triangle the measure of d is 35° and the measure of cab is 35° what is acd

108. ## English

1. He worked hard to be a best baseball player. 2. He worked hard to be the best baseball player. (which one is right? Do we have to use 'a' or 'the'? Do they have a different meaning?)

109. ## Physical Science

The transfer of heat that takes place because of the density difference in fluids is

110. ## language arts Ms. Sue please

4. "Brer" is dialect for briar. brother. Mister. brawny. 5. What is the main reason to ask questions as you read a story? to describe the characters to summarize the plot to identify the author’s purpose to aid in your comprehension My answers: 4.

111. ## math

A basket contains 15 red numbered balls and 10 white numbered balls. A sample of five balls is selected. How many samples contain three red balls and two white balls? Explain your answer.

112. ## Algebra

3 real numbers that form a geometric progression have sum equal to 175 and product equal to 17576. What is the sum of the largest and smallest numbers?

113. ## Chemistry

At a given Temperature, the elementary reaction AB in the forward direction is first order in A with a rate constant of 3.90*10^-2s^-1. The reverse reaction is first order in B and the rate constant is 8.20*10^-2s^-1. What is the value at equillibrium for

explain All the parallelograms are rhombus but all rhombus are not a parallelograms

115. ## Algebra

Consider all quadruples of real numbers (x_1,x_2,x_3,x_4), such that x_1\leq x_2 \leq x_3 \leq x_4 and each of the four numbers plus the product of the other three equals 130. If S is the sum of all possible values of x_4, what is S, rounded to the nearest

116. ## Math

Do you think regular or irregular polygons are used more frequently in the design of objects and buildings in the world???

117. ## geometry

Consider the region in Quadrant 1 totally bounded by the 4 lines: x = 3, x = 9, y = 0, and y = mx (where m is positive). Determine the value of c such that the vertical line x = c bisects the area of that totally bounded region. Needless to say, your first

118. ## logirythms

1/2LOG(x-1)-3LOG(X+4)

119. ## Geometry

A two-player game is played with two piles of stones, with sizes m,n. On a player's turn, that player can remove any number of stones from one pile, or the same number of stones from each pile. A player loses when they are unable to take a stone. If 1 \leq

120. ## PHYSICS

A bottle containing 4 kgof water at a temperature of 15°Cis placed in a refrigerator where the temperature is kept at 2°C.How much heat is transferred from the water to cool it to 2°C?

121. ## probability math

bill is on the school archery team. the target has a center bull's-eye and two rings around the bull's-eye. the table gives the probabilities of each outcome. what is the probability that bill will get the next arrow in the inner or outer ring?express your

122. ## math

A box consists of white,yellow,green and black balls, in the ratio 2,3,1,6.Total number of balls are 432.How many yellow balls in the box

123. ## Algebra

a and b are positive numbers that satisfy the equation \frac {1}{a} - \frac {1}{b} = \frac {1}{a+b} . Determine the value of \frac {a^6}{b^6} + \frac {b^6} {a^6} .

124. ## Math

The volume of a cylinder is given by formula V= pi(3.14) r^2h where r is base radius and h is height a) the height of a cylinder of radius 5cm and volume 500. Cm^3 B) radius of base of a cylinder of volume 300 cm^3 and height 10 cm Our teacher didn't

125. ## geometry

Carlos want to show a rectangle in his drawing. What dotes he have to do to the drawing below to make the rectangle a closed shape?

126. ## Economics

Protecting intellectual property rights can result in new inventions that help the economy to grow. True False

127. ## Algebra

3 real numbers that form a geometric progression have sum equal to 175 and product equal to 17576. What is the sum of the largest and smallest numbers?

128. ## physics

Show that the energy-momentum tensors for electromagnetism and for scalar field theory satisfy the dominant energy condition, and thus also the weak, null, and null dominant conditions. Show that they also satisfy w>-1

129. ## probability math

bill is on the school archery team. the target has a center bull's-eye and two rings around the bull's-eye. the table gives the probabilities of each outcome. what is the probability that bill will get the next arrow in the inner or outer ring?express your

130. ## urgent pls education

Assuming in your class,you have noticed that a particular child who is an adolescent has suddenly become withdrawn,discuss how you are going to help such a child???

131. ## science help?

(a) One such reaction fuses two nuclei of carbon-12 ( 6 12C ) to form an atom of neon ( 10 20Ne ) with the emission of an α-particle. Write an equation for this process, indicating the atomic number and mass number of each of the products in the usual

132. ## Trigonometry

using csc = 3.75, solve for sides: a= 3 b= ? c= ? and the remaining five trigonometric functions: sin= (1/3.75) cos= ? tan= ? sec= ? cot= ? *b is not 1; and c is not 3.75

133. ## math/ratios

There are 77 students in the student council. The ratio of girls to boys is 7:4. How many girls are in the student council?

134. ## Math

Teo rectangles with dimensions 8cm by 10cm and 9cm by 12cm partly cover each other(see the diagram). the grey area 37cm2. what is the area of the shape marked by dots? How can I upload diagram?

135. ## geography

1. Bolivia is pretty isolated--why? 2. Columbia has an important resource--what is it, where is it? 3. Brazil has many resources--where are they? Access? 4. Why is Brazilia a forward capital? 5. What is Cuba's access? Why does the US have a trade embargo

136. ## algebra 1

write a quadratic functions for graph that has an axis of symmetry of x= -3/2. summarize your steps.

137. ## World History (Ms. Sue)

How did the Emancipation Proclamation change the role of African Americans in the war? My answer: The Emancipation Proclamation delared that African-American men would be able to "be received into the armed services of the United States," which also lead

138. ## Chem

What is the specific heat in J/g Celsius for a metal sample with a mass 95.6 g which absorbs 841 J of energy when it's temperature increases from 30.0 degrees Celsius to 98.0 degrees Celsius?

144. ## calculus

A publisher prints and sells both hardcover and paperback copies of the same book. Two machines M and N are needed to manufacture these books. To produce one hardcover copy,machine M works 1/6 hours and N works 1/12 hours. For a paperback copy M and N work

145. ## chemistry

define elements, compound and molecules.

146. ## physics

A 7·cm tall candle is placed 125·cm from a lens with a focal length of +25·cm. Note: enter the absolute value of your answers for all distances and heights ... use the signs to determine the type and orientation of the images. a) How far from the lens

147. ## calculus

A publisher prints and sells both hardcover and paperback copies of the same book. Two machines M and N are needed to manufacture these books. To produce one hardcover copy,machine M works 1/6 hours and N works 1/12 hours. For a paperback copy M and N work

148. ## math

A publisher prints and sells both hardcover and paperback copies of the same book. Two machines M and N are needed to manufacture these books. To produce one hardcover copy,machine M works 1/6 hours and N works 1/12 hours. For a paperback copy M and N work

149. ## ENGLISH, HELP?

WHAT WOULD A GOOD ESSAY BE FOR A PROBLEM IN THE WORLD? LIKE POLLUTION, OR BANKRUPTCY? ANY OTHER IDEA'S?

150. ## Algebra

Find the value of p such that (–6, 3) is the midpoint of the points (-9, -1) and (–3, p).

157. ## biomechanics

A Softball is Thrown at an angle of 45 degrees with the horizontal. It leaves the hand 2m above the ground. Its Initial Velocity is 20 m/s . Neglecting all external resistance, how far would it travel ? The point at which it hits the ground is at the same

158. ## math

Why is 1/8 greater than 1/10 but less than 1/3?

159. ## word puzzle

Foreign object - fellow has one

160. ## Math

What does it mean when it says: Which state has the largest population growth

161. ## College Math - Probability

Briefly summarize the experimental design for deciding whether a proposed treatment should go on for further study. Note where independence came into play. If you were more conservative and reject the treatment only if the probability that it is 30%

162. ## physics

A Softball is Thrown at an angle of 45 degrees with the horizontal. It leaves the hand 2m above the ground. Its Initial Velocity is 20 m/s . Neglecting all external resistance, how far would it travel ? The point at which it hits the ground is at the same

163. ## math

find the volume of a square pyramid. Round to the nearest tenth(slant height=20 base=13)

164. ## Math

Need help on the question below. Which number belongs to the set of rational numbers but does not belong to the set of whole numbers? a. -1 b. 0 c. 1 d. 2 Thanks...

165. ## math

Marty ate 1/4 of his pizza and Luis ate 1/3 of his pizz.marty ate more pizza than luis.how is that possible?

166. ## Physics

What is the gibbs free energy for the reaction a)temperature b)800 degrees celsius c)comment on whether the reactions are spontaneous or not (CHEMICAL REACTION) deltaH = -100kJ delta S= -200 J/K

167. ## math

Greater than40 less than70divisible evenly 15 digits add up to6

168. ## math

How do you solve: imgur[dot]com/PlcCL8s [I had to upload cause its impossible to write proper notation here.

169. ## math

2log_3(9) solve

170. ## Chem

264.6 g of water is in a Styrofoam calorimeter of negligible heat capacity. The initial T of the water is 16.9oC. After 270.9 g of an unknown compound at 71.3oC is added, the equilibrium T is 33.2oC. What is the specific heat of the unknown compound in

171. ## math

log_3 (3)^(2x)

178. ## math

what does |-7| mean?

179. ## Math

18 play baseball, 17 play basketball, 30 play neither or both. I'm trying to make a Venn diagram but don't understand how. Please help!

180. ## math

find the coefficient of x^29 in the expansion (1+2x)^12 .(1+x)^18

181. ## Physics

A light beam containing red and violet wavelengths is incident on a slab of quartz at an angle of incidence of 81.0°. The index of refraction of quartz is 1.455 at 660 nm (red light), and its index of refraction is 1.468 at 410 nm (violet light). Find the

182. ## pre algerba

For the past 4 weeks, you have saved $5 per week. You know have$65 in your savings account. Write an equation that represents your balance A after t weeks.

183. ## algebra 1

write a quadratic functions for graph that has an axis of symmetry of x= -3/2. summarize your steps.

184. ## statistics

a. A single student (n=1) b. For a mean of 50 student (n=50) c. For a mean of 500 students (n=500)

185. ## Chemistry

A 20.0mL 0.3M HCl solution is titrated with 0.4M NaOH. What is the exact pH of the solution before titration? And what is the pH at the equivalence point?(are there any straightforward formulas to use on this kind of problem?)

186. ## college physics

if a girl pulls on a 15 kg wagon with a constant horizontal force of 35N.Her friend pushes on the wagon in the same direction with a constant horizontal force of 10 N. and there is a friction force of 15 N. I need to draw a diagram of this problem and

187. ## Chemistry

How many grams ammonium chloride and how many milliliters 3.0 M sodium hydroxide should be added to 200 ml of water and diluted to 500 ml to prepare a buffer of 9.50 with a salt concentration of 0.1 M? Ka=9.24

188. ## geometry

The angles in triangle ABC satisfy 6sin∠A=3√3sin∠B=2√2sin∠C. If sin2∠A=a/b, where a and b are coprime positive integers, what is the value of a+b?

189. ## algebra

an object is launched vertically in the air at 29.4 meters per second from 10 meter tall platform . find its maximum height in seconds and in meters ?

190. ## government

How to do informational paragtaph on structure of our local goverment (mississippi)

191. ## Chemistry

A 20.0mL 0.3M HCl solution is titrated with 0.4M NaOH. What is the exact pH of the solution before titration? And what is the pH at the equivalence point?(are there any straightforward formulas to use on this kind of problem?)

192. ## physics

a disc of radius 5.70 cm rotates about its axis and a point 1.90 cm from the center of the disc moves 34.5 cm in 12.2 s .calculate the angular velocity of the disc.

193. ## Math

5 books and 9 magazines cost $150.50 altogether. 9 books and 5 magazines cost$175.70. How much does 1 book and 1 magazine cost?

What is arithmetic and geometric sequences?

195. ## english

Write the pronoun in these sentences. Then write the underlined words,that they replace. " Let us think of a way to clean up litter," said Matt and Lynn. ( the underlined word is Matt and Lynn)

196. ## college physics

If a girl drops a coin into a wishing well. After exactly 5 seconds she hears it splash into the water. How fast was the coin going after 1 second? After 2 seconds? How fast was the coin going when it hit the water? How far down is the water? Could you

197. ## Math

Precalc (1+i)^3 and the cube root of 8i

198. ## math

There are 3 pitchers of juice. Each student will be served ^ of the juice in a pitcher. How many students will get juice? l a. Draw lines on the pitchers to show how many students these pitchers will serve. b. Write a number model to describe the problem.

199. ## Chemistry

What is the pH of a saturated zinc hydroxide solution?

200. ## Algebra 1

Can you please help me with this question? I put parenthesis to make it look less confusing. (10)/(x)-(10)/(x-3)=(-3)

223. ## Physics

A golf ball with a mass of 50.3 g can be blasted from rest to a speed of 72.1 m/s during impact with a club head. Assume that the impact lasts only about 0.910 ms. Calculate the change in momentum of the ball. Calculate the average force applied.

224. ## math

the letters g and g stand for numbers. if g + 9=h + 9, what is true about g and h?

225. ## Physics

A physics teacher (mass = 84.5 kg) is jogging through the woods and runs straight into a large oak tree at 3.5 m/s. Rebound speed is measured at 2.3 m/s in the opposite direction. If the time of contact with the tree is 45 milliseconds, what is the

226. ## Math

If someone is renting a truck that has a 40 gallon tank and it gets 10 miles per gallon and they are traveling 252 miles, what will they pay for gas for the trip?

227. ## physics

A ball whirls around in a vertical circle at the end of a string. The other end of the string is fixed at the center of the circle. Assume that the total energy of the ball-Earth system remains constant. (a) What is the tension in the string at the bottom?

228. ## Chemistry

What volume of a 6.0 M NaOH solution would you need to prepare 250.0 milliliters of a 3.0 M NaOH solution?

229. ## Math

1. What two numbers can be multiplied to equal -60 and added to be -11? 2. What two numbers can be multiplied to equal -36 and added to be -16? 3. What two numbers can be multiplied to equal 10 and added to equal -7? Thanks

230. ## Stats

1. The question asks to choose a data point in our graph (we chose 476,44) of median home prices (x) and percentage of students who scored Advanced on math MCAS (y). We have to find the residual. I'm confused because the equation I was given is e=y-yhat I

231. ## DES

A rock is being pushed by a stream with 30 N of force. The rock has a static friction of 40 N and a sliding friction of 20 N. Does the rock move?

232. ## College Mathematics

Counting Principles and Permutation. A social security number consists of 9 digits. How many different social security numbers are possible if repetition of digits is permitted

233. ## Grammar

By, who were telephones improved? How can I know if this is right with who or should it be whom?

234. ## Life orientation

In 10-15 lines critically discuss 5 ways in which the human or environmental problem impact on the community

235. ## jiskha

Lol, I have a quick question...If you don't mind. Do you hink jiskha will have thier own app one day? It's so tiring, because you need wifi right lol just curious.

236. ## Physics

Suppose that each of the three masses in the figure below has a mass of 5.50 kg, a radius of 0.0700 m, and are separated by a distance of 10.5 m. If the balls are released from rest, what speed will they have when they collide at the center of the

237. ## English

Should I use a comma or colon after as in this sentence? The sentence is not complete that I posted here I have learned many things in this class I will list a few such as different writing styles, write descriptive paragraphs,

238. ## precalc

sine curve in the form of y = a sin(pi/2x) that passes through the point (2.5,-9.546)

239. ## Math HELP!! :(

a contractor's designing one side of an office building 48 feet in length the windows are each 5 feet long and will be placed Six feet apart and 5 feet from the end of the building wall how many windows can a contractor design

240. ## math

Hi, This is the third time I posted this because it wasn't answered by anyone. PLEASE help. I think the first part is correct but I am not sure if the V=lw10 is correct. I got 10 for the number of cubes. Here is the question There is a picture with stacked

307. ## stats

Use this z-score formula for this problem: z = (x - mean)/(sd/√n) x = 1.25, 1.50 mean = 1.35 sd = 0.25 n = 40 Calculate two z-scores, then use a z-table to determine probability between the two scores. I hope this will help get you started. •stats. -

308. ## Physics

A bungee jumper (m = 66.00 kg) tied to a 39.00 m cord, leaps off a 69.00 m tall bridge. He falls to 5.00 m above the water before the bungee cord pulls him back up. What size impulse is exerted on the bungee jumper while the cord stretches?

309. ## math

Two angles between 0 degrees and 360 degrees have a tangent undefined. What are the angles? Why is the tangent undefined for each of those?

315. ## Physics

A charge of -3.66C is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass (radius = 0.0978 m). The charges on the circle are -4.04C at the position due north and +6.20C at the position due east. What is (a) the

316. ## algebra

1.You flip a coin 30 times and get heads 11 times, so the chance of getting heads is 11/30. Is this an example of theoretical or experimental probability? theoretical experimental * 2.You have made 3 out of 10 of your last free throws. How many free throws

317. ## Biology

Where is the clitoris situated? What is transpiration? What is the function of Bertholin's Glands? What is the chemical composition of melanin? Where are the testicles situated in the human body?

318. ## math 140

A football team gained 12 yards on one play, lost 40 yards on another, and gained 34 yards on the last play of the first half. They had already gained 345 already during the half. What was the total yardage gain for the first half?

319. ## math

. Find the roots of the polynomial equation. x2 + x undefined 72 = 0 (Points : 1) 9 and 8 6 and 6 2 and 16 9 and 8

320. ## Quantum Physics

Let |\psi\rangle=\frac{1-i}{2}|0\rangle-\frac{1+i}{2}|1\rangle and |\phi\rangle=\frac{2+i}{3}|0\rangle-\frac{2i}{3}|1\rangle. What is \langle \psi\,|\,\phi\rangle? Please tell the ans...

321. ## Language Arts

what kind of behavior were greek myths meant to encourage? i think it is mainly to discourage selfishness and greed.

322. ## chemistry

Construct the correct structure for AsClF42-. Please construct the molecule such that the dipole is oriented vertically up or vertically down. - Name the type of hybrid orbitals the central atom forms. - Name the molecular geometry of the compound. - State

323. ## algebra

What is the probability that a month picked at random will have 31 days? A.5/12 B.4/12 C.7/12 D.8/12 I think it is C...?

324. ## Life orientation

describe the course of Ap chdmistry

325. ## Physics

Betty weighs 449 N and she is sitting on a playground swing seat that hangs 0.55 m above the ground. Tom pulls the swing back and releases it when the seat is 0.76 m above the ground.The acceleration of gravity is 9.8 m/s^2. How fast is Betty moving when

326. ## Algebra

If you rolled a number cube 100 times, how many times would you expect to get an even number? A.25 B.75 C.50 D.38 I think it is C...?

327. ## simple queston

what is -430 in scientific notation?

328. ## chemistry

Which of the following combinations of atomic orbitals can combine to form sigma bonds? s-s ,s-p, p-p ,hybrid orbital - hybrid orbital ,hybrid orbital - s ,hybrid orbital - p

329. ## Algebra

1. Simplify the expression: (x^3*y^5) (-y^7) 2. Write the expression in radical form: (125x)^1/3

330. ## math

The crater is circular and has a radius of about 0.4 mile. About how many square miles does this crater cover. Use 3.14 for pi answer my 1.256square am i correct

331. ## chemistry

Carbon reacts with chlorine and hydrogen to form the compound CH3Cl. (a) Construct the structure of CH3Cl. What is the dominant form of secondary bonding for CH3Cl? Dipole-dipole interactions, London dispersion forces, Covalent bonding, Ionic bonding

332. ## physics

A(n) 96.1 g ball is dropped from a height of59.1 cm above a spring of negligible mass.The ball compresses the spring to a maximum displacement of 4.75403 cm.The acceleration of gravity is 9.8m/s^2. Calculate the spring force constant k. Answer in units of

333. ## chemistry

a 225.0 g sample of an unknown, silver, pure metal was heated to 95.5 degrees celsius then put into 150.50 g of water at 22.5 degrees celsius. the water was heated by the hot metal to a temperature of 31.4 degrees celsius. what is the specific heat? what

334. ## Algebra

We define n♡ recursively as follows. 1♡=1; n♡=((n−1)♡)⋅n+1 Find the largest n

335. ## physics

In an arcade game a 0.099 kg disk is shot across a frictionless horizontal surface by compressing it against a spring and releasing it.If the spring has a spring constant of 244 N/m and is compressed from its equilibrium position by 4 cm, find the speed

336. ## Math

Is the opposite of 0 still 0 or does 0 have no opposite? Thanks...

337. ## Algebra

Let S(N) denote the digit sum of the integer N. Let M denote the maximum value of N/S(N), where N is a 3-digit number. How many 3-digit numbers N satisfy N/S(N)=M? The digit sum of an integer is the sum of all its digits. For example, the digit sum of

338. ## Number theroy

What is the 50th smallest positive integer that can be written as the sum of distinct non-negative integer powers of 3?

339. ## AP Chemistry

What mass in grams of sodium hydroxide is produced if 20.0 g of sodium metal reacts with excess water according to the chemical equation? 2Na(s)+2H20(l)=2NaOH(aq)+Hs(g) How many moles of Ag can be produced if 350. g of Cu are reacted with excess AgNO3

340. ## Geometry

BC 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? It is not stated that D lies on BC. This assumption is not necessarily true.

341. ## Science

how many kw is an airflow of 30m³/s @130°C

342. ## Combinations Maths

For how many positive integers n are there exactly ⌊n/2⌋ or ⌈n/2⌉ primes less than or equal to n?

343. ## English

Can someone check of this email is grammatically correct? Thank you. How are things? 1) I’ve been on holiday in England and I’ve been attending an English summer course for two weeks. 2) I’ve met an interesting girl from London, Mary, at a party

344. ## Science

Need help on the question below... Which is the warmest climate zone? A. Arctic Zone B. Temperate Zone C. Tropical Zone D. Intermediate Zone Thanks :)

345. ## English

1. He seldom tatoos roses on his arms. 2. He sometimes woos when he meets a pretty lady at a meeting. 3. He seldom tatooes roses on his arms. 4. He sometimes wooes when he meets a pretty lady at a meeting (Which ones are grammatical?) 5. He tatooed a

346. ## aig math

A bookshop had 60 boxes of pencils. Each box contained 85 pencils. Half of the pencils were packed into packets of 25 pencils and the rest were packed into packets of 20. How many packets of pencils were there altogether? My answer is 229 am i right? How

The strongest recorded earthquake in the world took place in Chile on May 22 1960. It had a magnitude of 9.5 on the Richter scale. The strongest quake actually recorded in Canada was magnitude 8.1 on August 22 1949 and occurred off the Queen Charlotte

348. ## physics

An aluminum wing on a passenger jet is 38 mlong when its temperature is 23°C.At what temperature would the wing be 2 cm (0.02 m) shorter?

349. ## chemistry

A student extracts 6.3 g of water when performing the following combustion: C2H8 + 4O2 --> 2 CO2 + 4H2O If the theoretical yield is 8.6, what is the percent yield?

350. ## Math

Principal 450.00 x interest rate 9.25 x compounded monthly x 4 years

351. ## math

What is the rule for this input/output table Input 2 output 10 Input 6 output 26 Input 8 output 34 Input 10 output 42

352. ## Statistic

In a jar there 12 white balls 8 red balls 4 greens all with the same size if a person selects one ball at random find the probability it is a red ball.

353. ## organic chemistry

when i add methyl salicylate to aqueous sodium hydroxide, immediately a white solid forms... that is sodium salicylate is it?? Since it hasn't been heating under reflux yet.

354. ## proprotions

why did the envelope lose the race with the cardboard box?

355. ## math

2log[base3]9 = ?

How do you find an answer to a MAD (mean absolute deviation) chart?

357. ## World History (Ms. Sue)

What was Lincoln's reasons for not emancipating slaves when the war began? My answer: Lincoln did not believe he had the power under the Constitution to abolish slavery where it already existed. Nor did he want to anger the four slave states that remained

358. ## urgent maths pls

A goat is tied at point A with a rope of length(L). How long can L be so that the goat can feed on exactly half of the field if the field is a circle.

359. ## Chemistry

Question 2 Marks: 2 How many grams of oxygen gas must react to give 174.3 grams of ZnO according to the balanced equation. 2 Zn(s) + O2(aq) --> 2 ZnO(s)

360. ## algebra II

i just placed $1500 in an account which earns 8% per year compunded quartely. how much money will be in the account in 20 years? how long will it tke for this account ot have$7000 in it?

361. ## Chemistry

Question 2 Marks: 2 How many grams of oxygen gas must react to give 174.3 grams of ZnO according to the balanced equation. 2 Zn(s) + O2(aq) --> 2 ZnO(s)

362. ## physics

A 1.03 kg mass is attached to a spring of force constant 10.6 N/cm and placed on a frictionless surface. By how much will the spring stretch if the mass moves along a circular path of radius 0.525 m at a rate of 2.20 revolutions per second?