# Questions Asked onMarch 12, 2013

1. ## math

a new physician saw 841 clients during the first year of her practice and 1,072 the second. which represents the percentage increase in client volume? a. 22% b. 27% c. 78% d. 127%

2. ## math

a satisfaction survey is administered to 568 people. seventy- one people were unsatisfied with the product. which statement is true? a. 1 out of every 8 clients was unsatisfied b. 6 out of 8 clients were satisfied c. 1/4 pf the clients were unsatisfied d.

3. ## math

which would be the approximate metric equivalent to 7 inches? a) 0.63 mm b) 1.4 m c) 12 dm d) 18 cm

1. What is the simplified form of squared root 140? A.) 4 to the square root of 35 B.) 10 to the square root of 14 C.) 2 to the square root of 70 D.) 2 to the square root of 35 Please show me how to do this Thank You

5. ## Math

Of 30 students, 12 play football, 17 play soccer, and 5 play both, how many play neither?

6. ## algebra

volume of cone varies jointly as square of its radius and its height if volume of a cone is 27pie cubic inches when radius is 3 inches and height is 9 inches find volume of a cone when radius is 4 inches and height is 3 inches

7. ## math

six hundred and thirty miligrams is equal to how many grams? a) 0.063 g b) 0.63 g c)63 g d) 630,000 g

8. ## Math: Probability

1. Which of the following is an example of a dependent event? (1 point) flipping two coins rolling a number cube and spinning a spinner choosing two scoops of ice cream choosing a cookie at random, eating it, and then choosing another at random 2. Which of

9. ## Physics

An aluminum ring of radius 5.00 cm and resistance 2.00 10-4 Ω is placed around the top of a long air-core solenoid with 997 turns per meter and a smaller radius of 3.00 cm, as in the figure below. If the current in the solenoid is increasing at a constant

10. ## Physics

A transport plane takes off from a level landing field with two gliders in tow, one behind the other. The mass of each glider is 700 {kg}, and the total resistance (air drag plus friction with the runway) on each may be assumed constant and equal to 2100N

11. ## science

which structure is common to both prokaryotic and eukaryotic cells ? a. mitochondria b. cell membrane c. endoplasmic reticulum d. pladtids

12. ## Phonemes

I just wanted check my phonemes' division cow -c/ow (2 phonemes) tree- t/r/E (3) shopping - sh/o/p/i/ng (5) matter - m/a/t/e/r/ (5) gutters- g/u/t/e/r/s (6) horse h/o/r/se (4) car- c/a/r (3) chart /ch/a/r/t (4) see - s/e (2) saw- s/aw (2) sawing- s/aw/i/ng

13. ## English

Fire can be either friendly or a foe, depending on the situation. is this a correct paralell sentence

14. ## math

The bases on a baseball diamond are 90 feet apart. How far is it from home plate to second base? Please explain

15. ## math

If a storm window has an area of 315 square inches, what are the dimensions if the window is 6 inches higher than it is wide (w x h)?

16. ## English

My sister Aliah is both a comic and smart. Parallel Sentence?....

17. ## maths-surface area

The diameter of a road roller is 140cm and its length is 2.2m. It takes 400 complete revolutions to move over to level a stretch of a road 2.2m wide find the surface area of stretch of road leveled in m sq.

18. ## physics

a 20N force is required to stretch a spring by 0.5 m. a) what is the spring constant? b)how much energy is stored in the spring ?

19. ## algebra

Find the distance, d,across the river. Assume that the ratio of d to 90ft is the same as the ratio of 100ft to 50ft

20. ## job related

A gable roof with a slope of 9 inches per foot has a rake slope factor of 1.25. If the run is 10 feet and the eaves length is 30 feet. What is the roof area in sq feet. a 150 b 1500 c 300 or d 750

21. ## math

In a group of 200 high school students, 36 are taking biology, 52 are taking Spanish, and 126 are taking neither biology nor Spanish. If one of these 200 students is to be chosen at random, what is the probability that the student chosen is taking biology

32. ## Math Ms. Sue please

6. Which is the best measure of central tendency for the type of data below–the mean, the median, or the mode? Explain. Hours of sleep each night Median; there will be outliers Range; there are no outliers Mode; the data are non-numeric Mean; the

33. ## social studies

Please check: 1812- United States declares war against Britain The warship Constitution defeats the British ship Guerriere 1813- Battle of Lake Erie Battle of THames 1814- British burned Washington, D.C Battle of New Orleans 1815- Francis Scott Key writes

34. ## math

What are the next two numbers in this pattern? 88 44 64 32 52 _ _

35. ## Spanish

Que te gusta hacer? My choices are (A).A mi tambien (B).No,no me gusta. (C).No,me gusta Tampico. (D).Me gusta montar en monopatin

36. ## Morphemes

Please check these morphemes' divisions. 1)mice -/mice/ (1) 2)sitting - /sitting/ (1) 3) punches - punch/es (2) 4)runners - /runner/s/ (2) 5)firefighters - fire/fight/ers (3) 6) Automobile - auto/mobile (2) 7)Chart - /chart/ (1) 8)horseshoe - horse/shoe

37. ## pre calc

The front sprocket off a bicycle is 12 centimeters and the rear one is 5 centimeters. What is the linear velocity of the chain around the back sprocket? if the bicycle has tires that have a 38 centimeter diameter, how fast is the bicycle moving?

38. ## Math

The total resistance of two circuits in parallel is 15 ohms and one circuit has five times the resistance of the other, find the resistance of each circuit. Use 1/R=1/R1+1/R2. R1 and R2 are two individual resistances. a)Find the smaller resistance b)Find

39. ## Physics

A man is standing on a cliff and throws a ball outward 50m/s at an angle of 53 degrees. It hits the base of the cliff in 10 seconds. Find: a) The height of the cliff b) the angle at which the ball goes into the sea c) if the ball will hit a boat 150m out

40. ## stats

Which test should be used one samples t test, independent samples t test or dependent samples t test and how to set up the hypothesis An educational psychologist was interested in whether using a student’s own name in a story affected children’s

41. ## Calculus

a and b are integers that satisfy: \displaystyle \lim_{x \to 1} \frac{x-1}{x^2-ax+b} = -\frac{1}{3}. What is the value of a+b?

49. ## paramount

Can you help me with a short interpretation for this poem? "A Voice" by Pat Mora.

50. ## Physics

A 50-cm wire placed in an East-West direction is moved horizontally to the North with a speed of 2 m/s. The Horizontal and Vertical components of the earth's magnetic field at that location are 25 ìT and 50ìT respectively. What is the emf between the

51. ## French Imparfait

In the imperfect form of this: the nous version wouloir do you take off the IR and the O or just the IR? What would it be?

52. ## Math

The legs of an isosceles triangle measures 2x^4+2x-1 units. The perimeter of the triangle is 5x^4-2x^3+x-3 units. Write a polynomial that represents the measure of the base of the triangle.

53. ## math

A number increased by 2/5 of it becomes 210. what is the number?

54. ## English

Neither the searing pain in my toe nor the blinding rain in my face will keep me from finishing the race. Is this a correct parallel sentence?....

55. ## Math

how many ways can you line up 11 people for a picture?

57. ## science plz help

Identify the one statement that is incorrect? all but one of the following statement about the melting and crystallization of magmas is correct.identify the one statement that is incorrect. 1)the presence of water decreases the melting temperature of

58. ## HISTORY

Please help with history? I have a project where I have to find the primary and or secondary source of today's time. The questions are 1.what is the context of the primary/secondary source that you have discovered? 2.what do you believe this reveals about

59. ## chemistry

Construct the correct structure for AsClF42-. You can begin by selecting an option from the menu on the right, then by filling in atoms and electron pairs (ep, if any) into the appropriate locations. Please construct the molecule such that the dipole is

60. ## physics

wonder waves in shallow yellow disc are 6.0 cm long. at one point, the water oscillates up and down at a rate of 4.8 of oscillations per second

61. ## Language Arts

Not sure between 2 answers on the question below. What is the BEST way to write this sentence correctly? "David went to the store and bought some bread then he took the long way home." a. David went to the store and bought some bread. Then he took the long

62. ## HIstory HELp!!

Please help with history? I have a project where I have to find the primary and or secondary source of today's time. The questions are 1.what is the context of the primary/secondary source that you have discovered? 2.what do you believe this reveals about

63. ## math

write 67% in decimal form?

64. ## math

which number solves the equation for x 1/3:x=1:3 a. 1/9 b. 1 c. 3 d. 9

65. ## english grammar

Ramesh generally drinks an orange juice

66. ## to Dr Jane

Please don't post incorrect answers to students questions. If you're the least bit unsure, don't post anything at all.

67. ## launguage

Read the following excerpt from “All Together Now”: What can parents do? We can put our faith in young people as a positive force. I have yet to find a racist baby. Babies come into the world as blank as slates and, with their beautiful innocence, see

68. ## STAT1

In the quiz in Exercises 1 and 2, the grading scheme is as follows: each right answer is awarded 5 points, and 1 point is taken off for each wrong answer. Recall that the quiz consists of 10 questions, and that in the class, the average number of right

69. ## Math/209

Dimensions of a Box A box is made from a rectangular piece of metal with length 50 inches and width 40 inches by cutting out square corners of length x and folding up the sides. (a) Write an expression that gives the surface area of the inside of the box.

70. ## venn diagram

In a marketing survey involving 1,000 randomly chosen people, it is found that 630 use brand P, 420 use brand Q, and 210 use both brands. How many people in the survey use brand P and not brand Q? dont tell me the answer just tell me how to do it

71. ## Chemistry

2H2O --> 2H2 + O2 if 30 mL of hydrogen in the above reaction, how many milliliters of oxygen are produced?

72. ## Physics

Ten meters away from a long straight wire, the field is 10-4 (10 to the negative four) Tesla. What current flows through the wire? I know the answer is 5.0kA but I am not sure what formula to use.

73. ## Chemistry

How many moles of gas are in a 30 liter scuba canister if the tempature of the canister is 300 k and pressure is 200 atmospheres?

74. ## Physics

a book is 240 mm in width. What is this width in centimeters? in meters?

75. ## Chemistry

2H2O --> 2H2 + O2 if 30 mL of hydrogen in the above reaction, how many milliliters of oxygen are produced?

76. ## pre calc

The front sprocket off a bicycle is 12 centimeters and the rear one is 5 centimeters. What is the linear velocity of the chain around the back sprocket? if the bicycle has tires that have a 38 centimeter diameter, how fast is the bicycle moving?

77. ## life orientation

write a critical explanation on each of the following:the high drop out rate (why learners stop their studies)and failure rate in their first year at colleges or universities

78. ## simple physics.....

You are holding onto a 100 kg basket of fish hanging over the side of a boat. What is the minimum force in Newtons you need to exert to keep the basket from falling back down into the ocean?

79. ## physics

A telescope has an objective with a refractive power of 1.20 diopters and an eyepiece with a refractive power of 220 diopters. What is the angular magnification of the telescope?

80. ## Math

Can you arrange the numerals 1 to 9 (1, 2, 3, 4, 5, 6, 7, 8 and 9) in a single fraction that equals exactly 1/3 (one third)? Could someone explain how you get the answer to the problem, please don't just say the answer!

81. ## Finance

An insurance company is offering a new policy to its customers. Typically, the policy is bought by a parent or grandparent for a child at the child's birth. The details of the policy are as follows: The purchaser (say, the parent) makes the following six

82. ## science

Zinc chloride solution is poured into a solution of ammonium carbonate. need conventional, ionic and net ionic equations thanks

83. ## College Chemistry

2NO(g)+O2(g)2NO2(g) has KP = 2.77 × 1011 at 25 °C. Suppose a mixture of the reactants is prepared at 25 °C by transferring 0.943 g of NO and 589 mL of O2 measured at 30.7 °C and 829 torr into a 1 L vessel. When the mixture comes to equilibrium, what

84. ## chemistry

What is the dominant form of secondary bonding for CH3Cl? Dipole-dipole interactions London dispersion forces Covalent bonding Ionic bonding

85. ## Science

Electrons involved in a _____ bond are shared unevenly. metallic double polar nonpolar

86. ## university chemistry

many cola soft drinks contain caffeine and benzoic acid (pKa 4.2), explain how you would isolate separately pure caffeine and benzoic acid from an aqueous solution containing both compounds

87. ## Physics

A ball is dropped from a height of 20m. When it bounces, it rebounds with a speed that is one half of the speed at which it hits the ground. How high does it bounce?

88. ## Chemistry

Do elements with higher masses always have lower average velocity than those elements with a low mass? Thanks

89. ## Trigonometry

A 22-foot ladder leans against a house. The top of the ladder is 12 feet above the ground. Find the angle the ladder makes with the ground.

90. ## chemistry

1L of a buffer composed of acetic acid and sodium acetate has a pH of 4.3 (total molarity=0.0774) what is the capacity of 200mL of the buffer to survive an addition of HCl without changing by more than 0.4 pH units? i am so lost please help! i know you use

91. ## Physics

When a man in a cage whose weight is 1000N pulls a rope that is attached on a cage around a fixed pulley,the force he exerts on the floor of the cage is 450N ,if the cage weigh 250N ,find the acceleration

92. ## Algebra

How many ordered pairs of solutions (a, b) are there to \frac{a}{b} - \frac{b}{a} - \frac{2}{a} - \frac{2}{b} = 0, where a and b are integers from -100 \leq a,b \leq 100?

93. ## Algebra

If f(x) = 2x + 5 and g(x) = 8-3x^2, what is the value of f(g(4)) - g(f(4))?

94. ## algebra

a rock is thrown witha velocity of 20 meters per second from the top of a 24 meter high cliff and it misses the cliff on the way back down. when will the rock be 10 meters from the water below? round your answer to two decimal places

95. ## Lang Arts! HELP!

Jaws of the Water ACT TWO At rise we see DAD, TINA, and MARK rushing in and out of the living room. Each enters carrying important items—such as sleeping bags, rain gear, and gallons of water—sets them down, and exits. All three come in together, and

96. ## Trigonometry

ABC is a non-degenerate triangle such that 2\sin \angle B \cdot \cos \angle C + \sin \angle C = \sin \angle A + \sin \angle B, what is the value of \lfloor 100 \frac {AC}{AB} \rfloor ?

97. ## Algebra

Joe picks 2 distinct numbers from the set of the first 14 positive integers S = \{1,2,3,\ldots,14\}. The probability that the sum of the 2 numbers is divisible by 3 can be expressed as \frac{a}{b}, where a and b are coprime positive integers. What is the

98. ## chemistry

3. You will be using 10.0 mL of silver nitrate solution labeled 170.0 g/L. How many grams of silver nitrate will be in your 10.0 mL sample?

99. ## Physics

You launch a model rocket up into the sky. Right after launch the rocket is accelerating upwards at 10~m/s^2. What is the magnitude of the net force in Newtons on the rocket if the rocket has a mass of 0.1 kg?

100. ## biology

what is the difference between plant and animal cell

101. ## physics

A charged particle with a charge-to-mass ratio of |q|/m = 5.7 × 108 C/kg travels on a circular path that is perpendicular to a magnetic field whose magnitude is 0.86 T. How much time does it take for the particle to complete one revolution?

102. ## Physics

Electrons are accelerated to reach a kinetic energy of 250 eV (= 4.0 x 10-17 J). If the acceleration is done in a distance of 0.20 m, what is the magnitude of the electric field causing the acceleration?

103. ## English

Thank you! Specific sentence about capitalizating: The sentence is also long. Would you break it up like my eaxample. I have a Web Design and Interactive Media Associates degree. I also have experience in basic web design, graphic design, basic web

104. ## Calculus

Given f(x) = x^4 + 6x^3 - 15x + 7, evaluate \displaystyle \lim_{h \to 0} \frac{f(1+h) - f(1-h)}{h}.

105. ## Algebra

How many distinct prime factors does 100100 have?

106. ## math

find the value of x so that f(x) = 13 in f(x) = -1/4x. my answer is -52.

107. ## Note for Ms. Sue

Check out the Physics posting on the top of the list. Can it be deleted?

108. ## Algebra

In a certain positive fraction \frac{a}{b} , the numerator is 2 less than the denominator. If the numerator and denominator are interchanged, the fraction is increased by 1 \frac{1}{15} . Find a + b .

109. ## accounting

13. A drawback to using _______ when inventory costs are rising is that the company reports lower net income. A. LIFO B. FIFO C. specific-identification costing D. average costing 14. The balance sheet format that lists assets

110. ## Geometry

In distinct odd-town, the inhabitants want to number their houses with 3-digit positive integers that are odd, which have all distinct digits. What is the maximum number of houses in odd-town?

111. ## physics

a force of magnutide 2N acted on the surface of a table of area 2M2 .find the pressure onthe table?

112. ## Geometry

7 points are placed in a regular hexagon with side length 20. Let m denote the distance between the two closest points. What is the maximum possible value of m?

113. ## math

I am working on quadratic equations and I have worked a problem down to 3 plus or minus the square root of 361 all over 2... what next?

114. ## Calculus

Given f(x) = \frac{x^3-2x+5}{x+4} and f’(3) = \frac{a}{b}, where a and b are coprime positive integers, what is the value of a+b?

115. ## Engish

Is these correct: Simple-Dolphins are very intelligent, social creatures. Compound- Dolphins are very intelligent and social creatures. Help on these on: Simple- Katy is thinking she might like to become a marine biologist one day.

116. ## Calculus

A train driver is driving along and he suddenly puts on the brakes. After he holds the brakes for t seconds, the train's sliding distance can be measured as d(t) = 30t - 0.6t^2 (in meters). When the train stops, how far did the train slide (in meters)

117. ## Physics

You are holding onto a 100 kg basket of fish hanging over the side of a boat. What is the minimum force in Newtons you need to exert to keep the basket from falling back down into the ocean?

120. ## physics

I'm a hurry to go to work today because I forgot to set my alarm clock and woke up late. I'm driving my car very fast, with a velocity of v=40 m/s and coming up to an intersection with a stoplight. When the distance between my car and the intersection is

121. ## paramount

Can you help me with a short interpretation for this poem? "A Voice" by Pat Mora.

122. ## Math

List all 2 digit numbers for which the sum of the digit is 5

123. ## Physics

Every once in a while a bird will get hit by a baseball during a baseball game. The longest home runs in baseball land about 500 feet (which is 152.4 meters) from home plate. If these balls leave the bat at a 45 degree angle to maximize their distance,

124. ## math

The product of the first five terms of a geometric progression is 32. If the fourth term is 17, compute the second term.

125. ## maths

Find the area of an equilateral triangle whose base is 10 cm.

126. ## Geometric Sequence

The product of the first five terms of a geometric progression is 32. If the fourth term is 17, compute the second term.

134. ## Math

List all 3digit numbers for which the sum of the digit is 3

135. ## Physics

A sound wave in air has a frequency of 240 Hz and travels with a speed of 334.7 m/s. How far apart are the wave crests (compressions)?

136. ## math

x^2-4x+32=0. would the final answer be 2 +or- 2 sqrt7 ?

137. ## Physics

A cord of mass 0.58 kg is stretched between two supports 28.1 m apart. If the tension in the cord is 273 N, how long will it take a pulse to travel from one support to the other?

138. ## Math

I have 5 friends. I bought three pizzas (all the same size). One was divided into 4 equal parts, the 2nd was divided into 6 equal parts and the 3rd pizza was divided into 8 equal parts. Is there any way I can show how to share these pieces so that each of

139. ## ethical/unethical

Is it ethical/unethical to use human cadavers to test out weapons and used them as crash test dummies?

140. ## Physics

A sailor strikes the side of his ship just below the surface of the sea. He hears the echo of the wave reflected from the ocean floor directly below 3.88 s later. If the speed of sound in seawater is 1560 m/s, How deep is the ocean at this point?

141. ## Teacher Aide; Enhancing Children's Self Esteem

Hello, could someone kindly help me with this problem a It's important to help children develop positive self-esteem because a it will help them be more successful at their careers later in life b they'll be more likely to question authority, when

142. ## math

what is the probability that two dice numbered 1-6 will roll 7

143. ## calculus

Let V be the volume of the 3-dimensional structure bounded by the paraboloid z=1−x^2−y^2, planes x=0, y=0 and z=0 and by the cylinder x^2+y^2−x=0. If V=aπ/b, where a and b are coprime positive integers, what is the value of a+b?

144. ## Chemistry

Use activity coefficients to find the concentration of hydrogen ions in a solution of 65.0 mM butanoic acid and 0.01 M NaCl. The ionization constant of butanoic acid is Ka = 1.52 × 10-5. Take the size of C3H7COO– to be 500 pm. Find [H+], pH, and alpha.

145. ## Algebra 1

The length of a rectangle is 5 ft greater than 4 times its width. The area is 369 sq ft . What is the length?

146. ## university chemistry

this is for a chemistry laboratory experiment called "how much caffeine is there in instant coffee" What should be the pH of the aqueous layer to extract caffeine? There are three aqueous solutions that you may choose from. A. pH >14, using 2.5 M NaOH (aq)

147. ## math

From Canoeville it is 2.4 kilometers to White Beach and 3.0 kilometers to the Lodge. How far is it from White Beach across the lake to the Lodge?

148. ## Quantum Physics

1.Provide a unitary that maps |+> to |1>and |-> to |0> . Enter 0 in all boxes if no such unitary exists. (In this case, you have to enter 0 explicitly. Blanks are not accepted.) 2.Provide a unitary that maps |+> to|0> and |-> to |+> . Enter 0 in all boxes

149. ## Physics

A 200-loop coil of cross sectional area 8.5 lies in the plane of the paper. Directed out of the plane of the paper is a magnetic field of 0.06 T. The field out of the paper decreases to 0.02 T in 12 milliseconds. (a) What is the magnitude of the change in

150. ## math

Jane painted a 12ft. x 12ft. mural in 45 minutes. How long will it take to paint a 15ft. x 16ft. mural?

151. ## math

using the 7 steps outlined in sec 4.3 of your book,analyze the graph of the following function R(x)=x^3-125/x^2-49

152. ## Physics...PLZ!! =)

A conducting rod whose length is 25 cm is placed on a U-shaped metal wire that has a resistance R of 8 Ù. The wire and the rod are in the plane of the paper. A constant magnetic field of strength 0.4 T is applied perpendicular and into the paper. An

153. ## Physics

Which of the following parallel-plate capacitors hold the largest charge? A) A capacitor with area A and separation 2d connected to voltage 4V B) A capacitor with area 2A and separation d connected to voltage 2V C) A capacitor with area 2A and separation

154. ## math

rectangle 7 cm by 4 cm

155. ## physics

A convex mirror with a radius of curvature of 34.0 cm forms a 0.95 cm tall image of a pencil at a distance of 12.5 cm behind the mirror. Calculate the object distance for the pencil and its height. Is the image real or virtual? What is the magnification?

156. ## maqth

explain the steps you follow to multiply by a 1 digit number

157. ## The principles of color

The word red describes the -------- of a color A. Hue B. value C. Intensity D. Shade

158. ## physics

A concave shaving mirror has a radius of curvature of 28.0 cm. For each of the following cases, find the magnification and determine whether the image formed is real or virtual and upright or inverted. (a) an upright pencil placed 41.6 cm from the mirror.

159. ## English

The space shuttle was both a marvel and huge. Parallel Sentencce?....

160. ## geometry

Square ABCD and circle T have equal areas and share the same center O.The circle intersects side AB at points E and F.Given that EF=√(1600-400π),what is the radius of T ?

161. ## Quantum Physics

Alice and Bob share a state a| + +> + b |- -> , where the first qubit is Alice's and the second qubit is Bob's. Alice measures her qubit in the standard basis and sends the measurement outcome to Bob. If Bob wants his qubit to end up in the state a |0> + b

162. ## Physics

Consider a capacitor made of two square plates of side 'l' . The distance between the two plates is 'd'. a) We insert a dielectric of dielectric constant K>1 and width l, a distance x (as in the diagram). What is the total capacitance of this arrangement?

163. ## Quantum Physics

Alice and Bob share a state a| + +> + b |- -> , where the first qubit is Alice's and the second qubit is Bob's. Alice measures her qubit in the standard basis and sends the measurement outcome to Bob. If Bob wants his qubit to end up in the state a |0> + b

164. ## Math

James uses a measuring wheel to find the length of a cross-country race course he holds the handle and rolls the wheel along the course.The wheel has a radius of 1 foot and it turns 2,000 times from the beginning to the end of the race course, how long is

165. ## science

what is the momentum of a 0.60 g bumble bee flying at 15km/h

166. ## chemistry

a 23.8 g sample of unknown metal heated at 100 degrees c is placed in 50.0 mL of water at 24 degrees c resulting in 8.5 c temperature increase. What is the specific heat of the metal

167. ## Life orientation

Name three responsibilities of media?

168. ## Math

Ms Washington buy a refrigerator that is 6 feet high, 3feet deep and 4 feet wide ,how many floor space does she need to fit the refrigerator

169. ## math

The perimeter of a square is 9. what is the area?

170. ## Quantum Physics

Alice and Bob share a state a| + +> + b |- -> , where the first qubit is Alice's and the second qubit is Bob's. Alice measures her qubit in the standard basis and sends the measurement outcome to Bob. If Bob wants his qubit to end up in the state a |0> + b

171. ## Chemistry

H3BO3 -> H+ + H2BO3- Why doesn't H3BO3 break down to something with H3O+ because it is a weak acid? I know many weak acids break down to something with H3O+ like HCN, C6H5COOH, HNO2, and HF.

172. ## AS machanics

A particle P of mass 2kg is attached to one end of a light rod of length 0.5m which is free to rotate in a verticle

173. ## Math

The legs of an isosceles triangle measures 2x^4+2x-1 units. The perimeter of the triangle is 5x^4-2x^3+x-3 units. Write a polynomial that represents the measure of the base of the triangle.

174. ## Writing

How should I write a poem from an aliens perspective?

175. ## english- main idea

A hurricane is a very powerful storm. It is a cyclonic storm, which means that it has a circular pattern within the hurricane within the hurricane. The name hurricane refers to storms that startover the Atlantic Ocean or eastern Pacific Ocean. For example,

176. ## Physics

A particle P of mass 2kg is attached to one end of a light rod of length 0.5m which is free to rotate in a vertical plane about its other end.The particle describes complete circles, Given that the tension at the bottom is 5times the tension at the highest

177. ## math (pemdas)

3*3 multiplied by 4+12= I did this but not sure that it is right 3x3x4+12 9x4+12 36+12=48

178. ## physics

An electric force moves a charge of +1.85 10-4 C from point A to point B and performs 6.70 10-3 J of work on the charge. (a) What is the difference (EPEA - EPEB) between the electric potential energies of the charge at the two points?

179. ## Science

1. Acceleration involves a change in ____. (1 point) speed velocity displacement direction 2. Which of the following statements about acceleration is true? (1 point) Like velocity, acceleration has a direction. Your acceleration is positive when you speed

180. ## english- main idea full

A hurricane is a very powerful storm. It is a cyclonic storm, which means that it has a circular pattern within the hurricane within the hurricane. The name hurricane refers to storms that startover the Atlantic Ocean or eastern Pacific Ocean. For example,

181. ## Math

How many strips of paper 4 inches long and 1 inch wide can be cut from a piece of paper 8 inches long and 6 inches wide

182. ## Phyics

The internal energy change in a system that has absorbed 4 Kcals of heat and 1000 J of work is:

183. ## Children's Literature

To establish the idea that books are written by real people, make a point to introduce the:

184. ## Physics

A capacitor consists of two concentric spherical shells. The outer radius of the inner shell is a=0.43 mm and the inner radius of the outer shell is b=2.2 mm . (a) What is the capacitance C of this capacitor? Express your answer in Farads. incorrect (b)

185. ## math

how do i find input and output for: input output _______ 10 16 11 22 14 50 28 8 _________ 30 18

186. ## math

how do i find input and output for: input output _______ 10 16 11 22 14 50 28 8 _________ 30 18

187. ## Physics

Location A is 3.40 m to the right of a point charge q. Location B lies on the same line and is 4.50 m to the right of the charge. The potential difference between the two locations is VB - VA = 45.0 V. What is the magnitude and sign of the charge?

188. ## bio chem

Explain how to prepare 1L of a buffer at pH 7.4 using 1M hypochlorous acid (Ka = 3.5 x 10-8) and a 1 M NaOH solution. Indicate the volume of hypochlorous acid and sodium hydroxide to use. pH = pKa + log ([A-]/[HA]) Ka= [H+][A-]/[HA] Molarity = moles/L

189. ## Physics

A very long cylindrical capacitor consists of two thin hollow conducting cylinders with the same axis of symmetry. The inner cylinder has a radius a, the outer one has a radius b. You may ignore end effects. (a) Fig. 1 (b) Fig. 2 (a) What is the

190. ## SCIENCE

when a diorite partially melts, which element(1)............ decreases in the melt as a(2).......... magma forms. I have few options to choose from a)iron b)andesite c)rhyolite d)potassium f)basalt No one has

191. ## math

input output 2 11 _______ 20 _______ 35 7 26 15 50 5 23 how do i solve this?

192. ## Math

A piece of wood is 8 ft long is to be divided into two pieces where one of the two is twice as long as two feet less than the other piece. What are the sizes of the two parts

193. ## Applied Calculus

If an open box has a square base and a volume of 112 in.3 and is constructed from a tin sheet, find the dimensions of the box, assuming a minimum amount of material is used in its construction. (Round your answers to two decimal places.) Height: Length:

194. ## Math

You have 12 square tiles,each tile measures 1 foot on each side,how many non congruent rectangles can you make ?,each rectangle must use ll 12 tiles

195. ## chemistry

what volume of oxygen at STP is required to affect complete combustion of 200cc of acetylene and what would be the volume of co2 formed?

196. ## Biochem

5. The glass electrode used in commercial pH meters gives an electrical response proportional to the concentration of hydrogen ion. To convert these responses to a pH reading, the electrode must be calibrated against standard solutions of known H+

most credit cards require that you pay a minimum monthly payment of 2% of the balance. Based upon a balance of $5,270.00 what would the minimum payment be? asked by Regina 198. ## math input output 10 12 15 22 21 _______ 6 4 29 50 _______ 2 how do i solve this problem? asked by ty 199. ## fraction Jenna bought a spool of ribbon for her craft projects.It contained 5 3/4 meters of ribbon.She used 3 2/5 meters of ribbon for a project.How many meters of ribbon does Jenna have left? I am trying to figure this question out to help my 4 grader.so I need to asked by ttuuffyy 200. ## 5th grade math bill is replacing the grass in his yard with cement .the yard is 300m long and 100m wide. if cement is 15cents per cm how much would it cost? asked by kit 201. ## Math having trouble figuring out this problem. During the first 4 wks of school, a cafeteria worker made more than 840 tacos. She made the same number of tacos each week. Which inequality best represents t, the number of tacos she made during 1 week. a. t > 410 asked by Brandi 202. ## Physic A pickup truck has a width of 78.9 in. If it is traveling north at 36 m/s through a magnetic field with vertical component of 33 µT, what magnitude emf is induced between the driver and passenger sides of the truck? asked by John 203. ## Physic An aluminum ring of radius 5.00 cm and resistance 2.00 10-4 Ω is placed around the top of a long air-core solenoid with 997 turns per meter and a smaller radius of 3.00 cm, as in the figure below. If the current in the solenoid is increasing at a constant asked by John 204. ## Chemistry If you add enough water to 175.0 mL of a .15 M NaCl solution until the final volume is 350.0 mL, what will the molarity of the diluted solution be? asked by Tim 205. ## reading why did the narrator of the story the gold caducallic seem proud asked by najyah 206. ## Math How many strips of wood can you have from an 8 inches long and 36 inches wide if the strips are 4 inches long 1 inch wide asked by Zack 207. ## math A 2 feet piece of wire is cut into two pieces and once piece is bent into a square and the other is bent into an equilateral triangle. How much wire should be used for the square to ensure that the total area enclosed by both shapes is minimized? asked by Joe 208. ## Calculus Consider the ellipse plotted by x^2+9y^2=9. Find the y-coordinate of the point on the ellipse that is farthest from the point (0,1). Your answer should be expressed as a fraction of whole numbers. asked by Joe 209. ## ACT Explore I'm taking the ACT explore tomorrow and I was wondering if there is a writing portion asked by Emma 210. ## calculus Consider the interval I=[6,7.6]. Break I into four subintervals of length 0.4, namely the four subintervals [6,6.4],[6.4,6.8],[6.8,7.2],[7.2,7.6]. Suppose that f(6)=19, f′(6)=0, f′(6.4)=−0.5, f′(6.8)=−0.1, and f′(7.2)=−0.1. What is the asked by Joe 211. ## English How to put these in a compound sentence? Simple-Dolphins are very intelligent, social creatures. Simple-Katy is thinking she might like to become a marine biologist one day asked by Aprilly 212. ## calculus Suppose f satisfies the differential equation dy/dx=y+1 and f(0)=1. In other words, f′(x)=f(x)+1 and f(0)=1. Use Euler's method with a step size of 0.5 to approximate f(1.5). asked by Joe 213. ## chemistry Use molecular orbital theory to predict whether the bond order in the superoxide ion, O2-, should be higher or lower than the bond order in neutral O2 molecule. Is the bond order of O2- higer or lower than that of O2? asked by adex 214. ## social studies Why did settlers in the West support going to war against Britain? asked by Celest 215. ## College Mathematics Probability. Select one card. One card is selected from a deck of playing cards. Determine the Probability of selecting a Jack OR a club. P(AorB)= P(A) + P(B) - P(A and B) asked by slomomo 216. ## Math HIIIIIIIIII!!!!!!!!!!! A television set may be described in terms of the diagonal measure of its screen. If a TV screen is 16 inches by 12 inches, what is the length of its diagonal? asked by Hannnahhhhh 217. ## Geometry Point M is the midpoint of the line equation ABMC. Which of the following is not true? (1)AM = MC (2) AB < MC (3) AM > BC or (4) BM < MC asked by Linda 218. ## Government In which type of colony did strict governors anger the colonists? A. the royal colonies B. the proprietary colonies C. the charter colonies D. the informed colonies asked by john 219. ## math (algerba 1) Right Angle Triangle: side A ? side B 3 square root side C 2m How would i find side a asked by Katea 220. ## Geometry The Z company specializes in caring for zebras. They want to make a 3-dimensional "Z" to put in front of their company headquarters. The "Z" is 15 inches thick and the perimeter of the base is 390 inches. What is the lateral surface area of this "Z"? asked by Eddie 221. ## english Write short notes on structure of Clear Light of Day asked by lakpa 222. ## English Does this sentence sound good for a beginning of a job proposal. “To begin with, I know that the designer for this freelance job would need to consider a dimensional look. asked by Bernie 223. ## english Discuss Midnight Children as a landmark in the history of indian novel in English (45o words)? asked by lakpa 224. ## The principles of color Which one of these color combinations is a complementary color scheme A. Yellow and violet B. red, red-orange ,and orange C. Red and yellow D. Yellow,green, and blue asked by Anonymous 225. ## Chem Polar or non polar covalent bonds C-H N-H C-C asked by Rs 226. ## language arts I need help writing a review for the book Helmet for My Pillow by Robert Leckie If anyone could give me an example that I could follow that would be well appreciated! asked by red 227. ## physics Amplitude of the wave is 0.2m. The time period of the vibration is 0.5secs. Calculate the frequency, velocity and the wave length. asked by Priya 228. ## Math Maize counted her dime.when she put them in groups of 4 ,she had two dimes left over.when she put them in group of 5,she had one left over.what is the smallest number of dimes she could have.if she has more than 10? asked by Pietro 229. ## math Tara filled 1/6 of her garden with tomato plants. Dan filled 1/6 of his garden with cucumber plants. How much did they fill in total? asked by Anon 230. ## physics wonder waves in shallow yellow dA.isc are 6.0 cm long. at one point, the water oscillates up and down at a rate of 4.8 of oscillations per second. A. what is the speed of the water waves? B. what is the period Of water waves? asked by Jordan 231. ## math cindy makes 1000 a month plus some money by commission. she gets 9% of everything she sells. if cindy sold 2000 worth of items this month what is her salary for the month asked by Anonymous 232. ## Math Find the unit rate for 20 mi in 2 h asked by Tasia 233. ## Math If you h ave an 8 inches long and 36 inches wide strip ,how many strips of wood can you have if it is 4 inches long and 1 inch wide asked by Zack 234. ## MAths algebra Tiger woods won the Buick Invitational.The following scorecard shows the result of Round1.there are 18 holes? per round and the table shows the number of times woods got each type of score. Score on a hole and Number of times score occurred Eagle (-2) 2 asked by Firdous 235. ## maths root over 3+2*root2 value is ???? asked by tuhituhi 236. ## physics a kids marble rolls of a 63 cm tall table a a speed of 30 cm/s. How far from the based of the table will the ball land? asked by lisa 237. ## english Which of the following groups of words in bold is nonrestrictive and should therefore be set off with commas in the sentence? (1 point) A.My yarn which is blue and gray will make a very pretty scarf. B.Hats knitted by my mother are worn all winter by my asked by Gia 238. ## physics You launch a model rocket up into the sky. Right after launch the rocket is accelerating upwards at 10 m/s^2. What is the magnitude of the net force in Newtons on the rocket if the rocket has a mass of 0.1 kg? asked by Jacobb 239. ## English I urgently need to prepare these sentences for tomorrow. Could you please have a look at them? 1.If they told me to clean my room, I would. 2.You’d better take the keys in case I might still be out when you come back. 3. Would all this have happened if asked by John 240. ## maths-probabilty A box contains 5 red balls and 6 black balls. in how many ways can 6 balls be selected so that there are at least two balls of each color? asked by anoynomous 241. ## algebra 1/2-3m/4 +7=4m- 9- m/28 asked by brock 242. ## physics A 6 N force acts on a current carrying wire of length 0.5 m that is placed in a 1.5 T external magnetic field. What is the current in the wire? asked by Billy 243. ## global marketing Why have the changes of the exchange rate occurred? asked by kzee 244. ## STAT The distribution of heights of a population of adults is approximately normal with mean 66 inches and SD 2.5 inches. 1. Approximately what percent of the adults are over 6 feet tall? 2. Approximately what percent of the adults have heights that are within asked by HELPPPPP 245. ## Math If there are 12 square tiles and each tile measure 1 foot on each side ,how many non congruent rectangle can you make.Each rectangle must use all 12 tiles asked by Zack 246. ## business if you have a loan for 200,000 at 5% int for 25 years, how much would the payoff amount be after 15 payments? asked by Anonymous 247. ## algebra Given the system of equations x(x+y)=9 y(x+y)=16 the value of xy can be written as a/b where a and b are positive coprime integers. Find a+b. asked by Anonymous.....ANYONE....PLEASE HELP... 248. ## Chemistry For 520ml water calculate initial and final pH after adding 0.02ml HCl asked by Anonymous 249. ## U.S. Government Which powers delegated or implied could also be referred to as expressed powers and why? asked by Morgan 250. ## physics Harper applies a force of 92 N on a heavy box by using a rope held at an angle of 45 degrees with the horizontal. What are the vertical and horizontal components of the 92N force? asked by Staci 251. ## algebra What is the sum of all the possible values of a for which 25x^2+(a−15)x+9 has exactly one distinct real root? asked by please...help...urgent.. 252. ## algebra... In a school, there are 4 more students in Class A than in Class B, and 4 more students in Class B than in Class C. As a reward for good behavior, a teacher decides to give out some sweets. Every student in class C got 5 more sweets than every student in asked by please...help...Ms.Sue.... 253. ## STAT. The average weight of a group of people is 156 pounds and the SD is 25 pounds. A statistician wants to transform the weights so that the transformed weights have an average of 100 pounds and an SD of 10 pounds. Fill in the blanks; both blanks must be asked by HELPPPPP 254. ## STAT. The average weight of a group of people is 156 pounds and the SD is 25 pounds. A statistician wants to transform the weights so that the transformed weights have an average of 100 pounds and an SD of 10 pounds. Fill in the blanks; both blanks must be asked by HELPPPPP 255. ## GEOmetry.. 7 points are placed in a regular hexagon with side length 20. Let m denote the distance between the two closest points. What is the maximum possible value of m? asked by PLEASE...HELP.. 256. ## Math If 2 gulps= 5 slurps, and 2 slurps= 7 sips then 35 sips=_____gulps? asked by Nomad 257. ## Reading “Aunt Dessie unfolded out of the car like a carpenter’s ruler” is an example of (1 point) a. personification. b. symbol. c. simile. d. metaphor. i think it is b. asked by Gia 258. ## MATHS.. In distinct odd-town, the inhabitants want to number their houses with 3-digit integers that are odd, which have all distinct digits. What is the maximum number of houses in odd-town? asked by PLEASE...HELP.. 259. ## biology Problem 5: Functional Groups On the structure of MTX below, identify the functional groups that are present by dragging the functional group name listed below onto the appropriate target boxes on the structure. asked by Anonymous 260. ## English I know that in a sentence of three or more words or phrases we need commas, but are the sujects supposed to be capitalized if not why or why not. Sample sentence below: As I have a Web design and interactive media associate degree, I do have experience in asked by Bernie 261. ## Math Dogs cats and donkeys had a tug of war.four cats tied with three dogs.two donkeys tied with six dogs .which side won when one donkey tugged with five cats? asked by Pietro 262. ## chemsitry How many moles of \rm CaC_2O_4 are present in this kidney stone? asked by indeus evans 263. ## science Ecological ________ - normal, gradual changes that occur in the types of species that live in an area. Help please and help me fast please!!!!! asked by hannah 264. ## Geometry Given: segment BD bisects angle ABC; AB=BC. Prove: triangle ABD congruent to triangle CBD asked by Constance 265. ## English -poem Caged bird, by maya angelou -analyze this poem for is metaphorical meAnings. What did the author wish to evoke? !@#$%^& did whe use words and phrasings and poetric devices ti do it? Just a simple help would do, and i could do the rest' thank you

Which of the following sentences uses commas with appositives correctly? (1 point) a.Mr. Van Daan’s son, Peter, spent a lot of time with Anne. b. Margot, Anne’s sister is the oldest. c. Miep the one who helped them, stopped coming. d.Mrs. Van Daan the

267. ## QSO 510

The Newox Company is considering whether or not to drill for natural gas on its own land. If they drill, their initial expenditure will be $40,000 for drilling costs. If they strike gas, they must spend an additional$30,000 to cap the well and provide the

268. ## algebra

Is 57/100 greater or less than 1/4?

269. ## algebra

Is 57/100 greater or less than 1/4?

270. ## English

Posted by rfvv on Monday, March 5, 2012 at 7:39pm. Try hard to succeed. (What is the part of speech of 'to succeed'? Is 'to succeed' the object of the verb 'try'? Or is 'to succeed' the adverbial phrase which modifies 'try'?) English - Ms. Sue, Monday,

271. ## Physics

A ball on the end of a string is whirled around in a horizontal circle of radius 0.33 m. The plane of the circle is 1.21 m above the ground. The string breaks and the ball lands 2.22 m away from the point on the ground directly beneath the ball’s

272. ## Math

How many strips of paper 4inches long and 1 inch wide can be cut from a piece of paper 8 inches long and 6 inches wide

273. ## chemistry

1L of a buffer composed of acetic acid and sodium acetate has a pH of 4.3 (total molarity=0.0774) what is the capacity of 200mL of the buffer to survive an addition of HCl without changing by more than 0.4 pH units? i am so lost please help! i know you use

276. ## English II

Expand each sentence below by adding words or phrases that modify the verb. Questions after each item suggest details you can add. A French girl found them. Who was with the girl? In what time period did she find them?

277. ## Science

Need help on the question below...I know it is not C or D The formation of metamorphic rocks depends on all of the following except a. the composition of parent rocks b. Earth's magnetic field c. temperature d. pressure Thanks

278. ## chemistry

I need 1L of a pH 4 buffer with a total molarity of 1. Propose a buffer system and a recipe to achieve this goal. (acetic acid/acetate would probably be a good choice.) help please!

279. ## Language Arts

Directions: Read the poem and answer the questions that follow. Fossil Flitting, flickering, flashing black, white, and a note of red passes beneath trees that were already old at the end of the Civil War. The lovely departed species announces its fearless

280. ## Chemistry

A salicyclic acid (MW= 138.123 g/mol) solution has a pH of 2.43. When 100 ml of this solution was evaporated 0.22g of dry salicylic acid was recovered. What is the Ka of salicylic acid?

281. ## Science

How many grams of NH3 can be produced if 105g of NH4OH are completey decomposed?

282. ## chemistry

I need 1L of a pH 4 buffer with a total molarity of 1. Propose a buffer system and a recipe to achieve this goal. (acetic acid/acetate would probably be a good choice.) help please!

283. ## Chemistry

How many grams of NH3 can be produced if 105g of NH4OH are completey decomposed?

284. ## Science

Is it true that the atomic bomb couldn't exist without radioactivity?

285. ## Maths

A tyre manufacturer has chosen 48 tyres at random from a production line and issued them to taxis for testing. Assume that the 48 numbers you have selected refer to the number of thousands of kilometres travelled during the life of each tyre. (For example,

286. ## Physics

A force is applied to a door at an angle of 56.8° and 0.34 m from the hinge. a) What force produces a torque with a magnitude of 2.18 N·m? b) How large is the maximum torque this force can exert?

287. ## physics

a 20N force is required to stretch a spring by 0.5 m. a) what is the spring constant? b)how much energy is stored in the spring ?

288. ## chemistry

I need 1L of a pH 4 buffer with a total molarity of 1. Propose a buffer system and a recipe to achieve this goal. (acetic acid/acetate would probably be a good choice.) help please!

2^1

290. ## Math

A field trip costs $8.50 per student. If 125 students are going on the trip and a total of$1011.50 has already been collected, how many students have not paid yet?

In what case is a control group receiving a placebo treatment not useful? what is the useful treatment for the control group?

292. ## chem

calculate the potential of a silver electrode in contact with the following: the solution that results from mixing 25ml of 0.05M KBr with 20mL of 0.1M Ag+

293. ## Statistics

A box contains five numbered balls (1,2,2,3 and 4). We will randomly select two balls from the box (without replacement). (a) The outcome of interest is the number on each of the two balls we select. List the complete sample space of outcomes. (b) What is

294. ## chemistry

calculate the theoretical potential of each of the following cells.is the cell reaction spontaneous as written or spontaneous in the oppsite direction? Bi|BiO+(0.04M),H+(0.2M)||I-(0.1M),AgI(sat`d)|Ag help meeeee

295. ## Chemistry

A sample of nitrogen containing 1.5x10^23 molecules has the same number of molecules as a sample containing A. 1.0 mole of H2 B. 2.0 moles of He C. 0.25 mole of O2 D. 0.50 mole of Ne

296. ## Statistics

*Give all probabilities to two decimal places. Three daily newspapers are published in a large city. Suppose we have the following facts about the people in the city: 60% read Newspaper A. 34% read Newspaper C. 72% read Newspaper A or Newspaper B. 18% read

297. ## Chem

How many moles of gas are in a 30 liter scuba canister if the tempature of the canister is 300 k and pressure is 200 atmospheres?

298. ## math

sean takes 8 hours to stain a deck then michelle. together it takes them 4.2 hour to complete the work. how long would it take sean to stain the deck by himself

299. ## College Mathematics

This is a repost. I posted a question 2 days ago and the response was wrong. The question was on Probability. The question was One card is selected from a deck of playing cards. Determine the probability of selecting a jack OR a club. use this rule P(A or

300. ## Physical chemistry 2

50 ml of 0.02M acetic acid is titrated with 0.1M NaOH.Calculate the pH of the solution when 10ml of NaOH is added

301. ## math

How many distinct 3 digit odd integers are there? Distinct meaning none of the digits repeat.

302. ## gepmetry

given coordiantes for one endpoint and midpoint find the other endpoint? endpoint is (-3,3/7) midpoint is (-2,-11/7)

303. ## Finance

Caustic Chemicals management identified the following cash flows as significant in their year end meeting with analysts: During the year Caustic repaid existing debt of $250,818 and raised additional debt capital of$693,120. It also repurchased stock in

The infamous Wile E. Coyote has been chasing the Roadrunner again. His latest idea for a trap involved launching an enormous boulder (about 16ft in diameter) up to a height of 750 ft, hoping that it would come down crashing on the unsuspecting Roadrunner.

305. ## Science

Speed is the rate of change in _____. A.velocity B.time C.direction D.distance I think it is D...?

306. ## Finite Math

How to solve this problem using this equation P(T)=Poekt how long must $5700 be in bank at 8% compounded yearly to become$10,550.30 where P0 is the amount initially placed in savings, t is the time in yaers and P(t) is the balance after time

307. ## Chemistry 104

A 0.30M solution of a weak monoprotic acid is 0.41% ionized. what is the acid-ionization constant, Ka for this acid? Use. HA + H2O H3O + A to figure out X for H3O and A

308. ## chemistry

If you start with 40.30 grams of silver nitrate and excess HCl, how much silver chloride could I make?

309. ## Science

If you exert a force on an object in motion you will change its _____. A.mass B.weight C.inertia D.momentum I think it is D....?

310. ## physics

A string under a tension of 43.0 N is used to whirl a rock in a horizontal circle of radius 2.45 m at a speed of 20.9 m/s on a frictionless surface as shown in the figure below. As the string is pulled in, the speed of the rock increases. When the string

A linear model can be used to describe the relationship between fuel economy(mpg) and horsepower (hp) for certain automobile models. mpg=46.868-0.0838 hp R^2=75.5% 1) Give the symbol and the value of the correlation coefficient.

312. ## Math

Last semester, a certain professor gave 36 As out of 390 grades. If one of the professor's students from last semester were selected randomly, what is the probability that student received an A? (Assume that each student receives one grade.)

313. ## Biochemistry

Explain how to prepare 1L of a buffer at pH 7.4 using 1M hypochlorous acid (Ka = 3.5 x 10-8) and a 1 M NaOH solution. Indicate the volume of hypochlorous acid and sodium hydroxide to use.

314. ## math

How many distinct prime factors does 100100 have?

315. ## physics

a body cools from 80 degrees to 50 degrees in 5 minuts. calculate what time it will take to cool from 60 degrees to 30 degrees?

318. ## Calculus

Find a such that the volume inside the hemisphere and inside the cylinder one half the volume of the hemisphere

338. ## Calculus

Evaluate  [double intergal (R xy dA)] , where R is the region bounded by x^2 +y^2 =0 and y>=0

339. ## stats

Which test should be used one samples t test, independent samples t test or dependent samples t test You may have heard that eating salt can influence people’s weight. Assume that the normal weight of 20-year-old females is 150 pounds. You obtain a

340. ## Maths

A tyre manufacturer has chosen 48 tyres at random from a production line and issued them to taxis for testing. Assume that the 48 numbers you have selected refer to the number of thousands of kilometres travelled during the life of each tyre. (For example,

341. ## stats

Which test should be used one samples t test, independent samples t test or dependent samples t test You may have heard that eating salt can influence people’s weight. Assume that the normal weight of 20-year-old females is 150 pounds. You obtain a

342. ## Physics

A block of mass m1 = 22.0 kg is connected to a block of mass m2 = 40.0 kg by a massless string that passes over a light, frictionless pulley. The 40.0-kg block is connected to a spring that has negligible mass and a force constant of k = 260 N/m as shown

343. ## Math

I am a 3 digit number My ones place is one more than my hundred My hundreds place is 3 greater then 6 My tens place is half of my hundred.

344. ## Probability

The probability that it will take 5 or more flips of a fair coin before it lands on heads can be written as a/b , where a and b are coprime positive integers. Find a+b

345. ## geometry

A parallelogram ABCD has perimeter equal to 124. Let E be the foot of the perpendicular from A to BC, and let F be the foot of the perpendicular from A to CD. If AE=7 and AF=24, what is the area of the parallelogram?

346. ## maths-probabilty

A man has brought tomota and five fruits from market. How many ways he can prepare mixed jam by selecting any 3 fruits excluding tomato

347. ## Trig

a. Form a pair of simultaneous equations by letting y1 equal the left side and y2 equal the right side of sqrt 5-x=1. b.Repeat part (a) with the equivalent equation sqrt 5=x+1 c. Repeat part (a) with the equivalent equation sqrt 5-x-1=0

348. ## geometry

ABCD is a trapezoid with AB parallel to DC. If AB=25, BC=24, CD=50 and AD=7, what is the area of ABCD?

349. ## PHUSICS

An old English nursery rhyme starts off "Jack and Jill went up the hill to fetch a pail of water". If the hill is 10 m high and Jack weighs 700 N, how much work in Joules did Jack need to do to get to the top of the hill?

350. ## Science

Name the Products & Reactants for: Moving Car Evaporating puddle Electrolysis of water

351. ## MAths algebra

ON day 1 each atheletic will begin the morning as follows Jog =3/2miles, walk=7/4 miles,Rest=5/2 minutes? and Walk=1 mile,. 1Q. Bettys atheletic trainer told her to follow the begining exercise trainig schedule on day 1.On day 2,she is to increase all

352. ## physics

if a studebt standing on the scale and the scale reads zero should the student worry...when on an elevator

353. ## QUERY -COMPUTER

hi i want to have antivirus in my computer, would u plse suggest me which should i go for . well i have also antivirus called ESET NOD32 Antivirus 6 plse tell me is it good antivirus or okay-okay.

354. ## maths-probabilty(urgently needed)

A box contains 5 red balls and 6 black balls. in how many ways can 6 balls be selected so that there are at least two balls of each color?

355. ## chemistry

Carbon reacts with chlorine and hydrogen to form the compound CH3Cl. (a) Construct the structure of CH3Cl.

Which radical expression is in simplified form? A.) 11y/3 square root *B.) square root of 6/5y C.) square root of 17/square root of 4 D.) square root of 25/81 Thank You

357. ## medical coder

location inpatient hospital patient russell shergrud attending physician gregory dawson,md preprocedured diagnosis acute respiratory failure postprocedure diagnosis acute respiratory failure procedure performed intubation with a #8 endotracheal tube. what

358. ## ..

if you already had the chiken pox you can be arournd a person with the disease without no fear of becoming sick. what feature of the immune system explains this? a. acquired immunity b. cell- mediated immunity c. humoral immunity d. primary immune system

359. ## Chemistry

What is the change in enthalpy when 17.0 g of liquid mercury is heated by 31°C?

360. ## Algebra

How do I factor out the greatest common monomial factor? 1) 9m^7 - 3m^2 2) 12a^5 + 8a 3) I need to describe and correct the error in facotring out the greatest common monomial factor of 18x^8 - 9x^4 - 6x^3 18x^8 - 9x^4 - 6x^3 = 3x(6x^7 - 3x^3 - 2x^2) is

361. ## Algebra

I need to solve these equations : 1) 5w^2 - 5w = 0 2) 2x^2 + 15x = 0 3) -32y^2 - 24y = 0 4) 6h^2 = 3h 5) -42z = 14z 6) -12p^2 = -30p

362. ## Math

Allison has a set of letter block each block is a unit cube. What is the volume of the figure she can build out of only vowels?what is the volume of the figure she can build out of all the letters?

363. ## math

how do i round 6^12 to one significant figure?

364. ## Math

What volume of hydrogen is necessary to react with five liters of nitrogen to produce ammonia? N2 + 3H2 --> 2NH3

365. ## Algebra

I need to factor out the greatest common monomial factor: 1) 20x^2y^2 - 4xy 2) 18s^2t^5 - 2s^3t 3) -2g^4 +14g^2 + 6g

366. ## geometry

A pyramid has a square bottom, with an area equal to 64 squares meters. the height of the pyramid is 7 inches. if you start at the top of the pyramid and slide all the way down the middle of one of the sides how many feet will you move?

367. ## biology

Allegra is a blockbuster allergy medication that generated over \$1.8 billion in global sales in 2004. Allegra, or Fexofenadine, decreases allergy symptoms by inhibiting the action of histamines. Histamines are naturally occurring molecules that are

369. ## English

When I first posted this question. I din't explain it correctly and didn't find the answer I received funny. But my question is When a sentence contain a list of three or more phrases, each item should be separated with a comma. The questions is do I

370. ## Math

What is greater than 30 and less than 50 and has a 6 digits

371. ## Physics

A ball is dropped from a height of 20m. When it bounces, it rebounds with a speed that is one half of the speed at which it hits the ground. How high does it bounce?

372. ## Geometry

Six standard six-sided die are rolled. Let p be the probability that the dice can be arranged in a row such that for 1\leq k \leq 6 the sum of the first k dice is not a multiple of 3. Then p can be expressed as \frac{a}{b} where a and b are coprime

373. ## math

ayesha is a gardener who make squar gardens in various sizes

374. ## Geometry

Determine the largest positive integer N, such that given any N-gon (not necessarily convex), there exists a line (infinitely extended in both directions) that contains exactly 1 edge of the N-gon. The figure in blue is an example of a 20-gon that doesn't

375. ## Geometry

Let S = \{ 1, 2, 3, \ldots 12\} and T_1, T_2, \ldots T_a be subsets of S such that T_i \not \subset T_j \, \forall i \neq j . What is the maximum possible value of a?

376. ## math

how many tens if there were no hundred dollars?

377. ## Algebra

Given the system of equations \begin{cases} x(x+y) &=& 9 \\ y(x+y) &=& 16 \end{cases} the value of xy can be written as \frac{a}{b} where a and b are positive coprime integers. Find a+b.

378. ## Chemistry

Starting with solid Tris base (FW 121.1) and 1 M HCl, describe how you would make 2 liters of 200 mM Tris-HCl buffer pH 7.5. pKa of Tris 8.14

379. ## earth

how does the water cycle ensure that we have water.

380. ## Algebra

Suppose f(x) and g(x) are non-zero polynomials with real coefficients, such that f(g(x))=f(x)\cdot g(x). If g(2)=37, what is g(3)?

381. ## math place value

how many tens if there were no hundred dollars for eg:200=what?

382. ## Chemistry

A salicyclic acid (MW= 138.123 g/mol) solution has a pH of 2.43. When 100 ml of this solution was evaporated 0.22g of dry salicylic acid was recovered. What is the Ka of salicylic acid?

383. ## Algebra

Let \phi(n) be the Euler Phi Function. If 1 \leq n \leq 1000, what is the smallest integer value of n that minimizes \frac{\phi(n)}{n}?

384. ## Science

Name the Products & Reactants for: Moving Car Evaporating puddle Electrolysis of wate

385. ## chemistry

Which of the following combinations of atomic orbitals can combine to form sigma bonds? s-ss-pp-phybrid orbital - hybrid orbitalhybrid orbital - shybrid orbital - p What is the bond angle (in degrees) resulting from sp hybridization? What is the bond angle

386. ## Algebra

Find the largest possible real value of \sqrt{(x-20)(y-x)} + \sqrt{(140-y)(20-x)} + \sqrt{(x-y)(y-140)} subject to -40\leq x \leq 100 and -20\leq y \leq 200.

387. ## maths

Find the largest possible value of sqrt[(x-20)(y-x)] + sqrt[(140-y)(20-x)] + sqrt[(x-y)(y-140)] if -40

388. ## Algebra

Consider all three-digit numbers that are greater than the sum of the squares of their digits by exactly 543. What are the last three digits of the sum of these numbers?