1. chemistry

What are the differences between ionic bonds and covalent bonds?

2. bca

____ is the code of acceptable behaviors users should follow while on the Internet; that is, it is the conduct expected of individuals while online.

3. Francais

Je pense que vous cachiez quelque chose dans tes estomacs: is the subjunctive in cachiez correct? (I think that you are hiding something in your stomachs).

4. chemistry

why is hydrogen bonding inly possible with hydrogen?

5. geometry

Find, to the nearest tenth of a centimeter, the length of a diagonal of a square if the measure of one side is 8.0 centimeters.

6. Science

What can you conclude about the reverse change Cr2O7 to 2 CrO4 and its dependence on hydroxide ions? Produce a balanced equation bu adding the proper number of OH- ions and H2O molecules to the appropriate sides of the equation.

7. Algebra 2

I am totally lost! (3x^4--8x^2 -3x-3) / (x^2-3)

In a velocity vs. time graph, the graph illustrates a triangle shape. A. why might a smart student say the object reverses direction? B. why might a smart student say the object doesn't reverse direction? C. Does the object reverse direction? Explain why.

9. statistics

The distribution of the heights of men in the U.S. is normally distributed with a mean of 70 inches and a standard deviation of 5 inches. a) What is the probability of an american male being less than 60 inches tall? b) What is the probability of an

10. statistics

The income of college students is normally distributed with a mean income per year is $12,000 and a standard deviation of$6,000. a)If we randomly sample 25 college students, what is the probability that the average income of our sample is less than

11. precalculas

the amount of bacteria in a petri dish increased by a percent change of 12% each hour over a period of 15 hours. a. find the growth factor for 1 hour? b. by what total percent did the bacteria change during this 15- hour time period.? c. how long will it

12. Statistics

In the harper valley subdivision, 79% of the houses have a deck while 49% of the houses have both a deck and a garage. Find the probability that the home has a garage given that it has a deck

13. sociology

The general trend of American's attitudes toward the unmarried had been from an attitude of _________ in the 1950s to and attitude of _________ in the 2000s

14. sociology

The general trend of American's attitudes toward the unmarried had been from an attitude of _________ in the 1950s to and attitude of _________ in the 2000s

15. statistics

A supplier of plastic pellets claims that when the plastic is pressed into wafers of uniform thickness, they will have a mean breaking strength of 165 newtons and a standard deviation of 5 newtons. An engineer at the company randomly selects wafers from 12

16. accounting

I need help with Intermediate Accounting 303 on-line

17. Chem

If you prepared a solution by adding 0.05mL (1drop) of 0.5M HCL to 5 x 10^7 mL of "pure" water. Calc the resultant PH. The answer isn't ph= 9.3. you have to add all the hydronium ions from all sources... but how ?

18. SQL

Explain why the following command would create an error, and what changes could be made to fix the error. SELECT V_CODE, SUM(P_QOH) FROM PRODUCT;

19. hum176

can u help me get a better understanding of why freedom of speech allows a variety of pop culture media to be released.

20. chemistry

why is hydrogen bonding only possible with hydrogen?

21. Physics

If an 80-kg sprinter can accelerate from a standing start to a speed of 10 m/s in 3 s, what average power is generated?

22. geometry

Basic Geometry 1. Find the perimeter of a rectangle 19 cm long by 27.8 cm wide. 2. In triangle ABC, angle A = 47°, and angle B = 8°. Find angle C. 3. Find the perimeter of a triangle with sides of length 28 cm, 47 cm and 19 cm. 4. In triangle FGH, angle

23. Math - Arithmetic

Qn: Given that 3, b, c and 18 are an Arithmetic Progression. Find the value of b and c.

24. sociology

The general trend of American's attitudes toward the unmarried has been from an attitude of _____ in the 1950s to an attitude of ______ in the 2000s A.) Non-acceptance; acceptance B.) Neutrality; non-acceptance C.) Non-acceptance; neutrality D.)

25. French - Help :(

Hi all. I'm trying to write a paragraph in french. These are my instructions: Décrivez vos activités habituelles pendant les vacances dernières en utilisant au moins sex verbes réfléchis à l'imparfait. This is what I want to say: Last winter, I did

26. math

a rectangle has length which is twice the width. if the diagonal is the 5 times the square root of 5 meters long, find the perimeter of the rectangle.

27. computer science

Opera Mobile is an example of: a smartphone. a wireless ISP. SmartMedia. a microbrowser.

28. Physics

In a velocity vs. time graph, the graph illustrates a triangle shape. A. why might a smart student say the object reverses direction? B. why might a smart student say the object doesn't reverse direction? C. Does the object reverse direction? Explain why.

29. calculus

Find the volume of the solid whose base is the region bounded between the curve y=sec x and the x-axis from x=pi/4 to x=pi/3 and whose cross sections taken perpendicular to the x-axis are squares.

30. English

When is Diego's school's anniversary? 1. It will be next month. 2. It is next month. (Which answer is correct? Are both correct? Which one is commonly used?)

31. French

I think that you are hiding something in your stomachs. Je pense que vous cachiez quelque chose dans tes estomacs. ^did I use the subjunctive correctly?

32. trigonometry repost .

This is an outline that i have to use to find the solution of the question. It involves logarithms and half-angle formulas.I have worked though it but got stuck on some parts. I'd like if you look over my work. solve the triangle for which given parts are

33. physics

Surprisingly, very few athletes can jump more than 2.0 ft (0.62 m) straight up. Use d = 1/2 gt2 and solve for the time one spends moving upward in a 2.0 foot vertical jump. Then double it for the "hang-time" -- the time one's feet are off the ground.

34. geography

Can you check my answer. What is the capital of the nation that is located at the southern tip of Africa? My answer is Tshwane(Pretoria) Is this correct?

35. chemistry

100ml solution made up 1.0M NH3 and (NH4)2SO4 have been added with 100ml of 0.1 HCl. how many moles are present in the solution before and after? given the pH of the solution is 9.26

36. maths

x^2-7x = 0 substitue x=7 into the equatiopn and explain why this shows that x=7 is the solution. ok so i do this: if x=7 then the equation becomes 7^2-49=0 7^2=49 49-49=0 so x=7 is correct (is that explanation enough?) now i have to write out a complete

37. math

Tom wrote a two-digit number.He multiplied it by 3, added 18, and divided by 8. His final answer was 9. What number did Tom write?

38. German

which preposition is most suitable 1)Mraias Zimmer ist______ Dritten Stock 2)Die Wohnung ist_____einem Hochhaus ------------------------------------------ a)Im Kleiderschrank _____meine Kleider(HANGS)

39. Math

Solve: 3x-2(3x-1)+4(x+1)=0

40. physics

give me an acrostic name of ma.lani aguirre

41. science

what is the formula for calcium and oxygen

42. grammar

'I might' a thought of that closet. Correct this sentence

43. chem

When varsol and iodine in potassium iodide aqueous solution is mixed, two phases form. What are the colours in each of the 2 phases when 2ml of I2/KI aqueous solution plus 2 ml of varsol are mixed in a test tube? What are the colours in each of the 2

correct the following sentences- 1) what you been doing there? 2) but old fools is the biggest fools there is. 3)i ain't doing my duty by that boy 4)it's mighty hard to make him work saturdays,when all the boys is having holiday. 5)'Tom, it was warm in

45. bio

what are the two structural components of a chromosome

46. Inter algebra

help, I am stuck on this one. -ã(7c)^2

47. math

the function has a real zero in the given interval. approximate this solution correct to two decimal places. f(x)=x^4-x^3-7x^2+5x+10; (2,3)

48. chemistry

Write a balanced chemical equation for the overall cell reaction represented as: a) Ag(s)|Ag^+(aq)||Sn^4+(aq), Sn^2+(aq)|Pt(s) b) Al(s)|Al^3+(aq)||Cu^2+(aq)|Cu(s) c) Pt(s)|Fe^2+(aq), Fe^3+(aq)||MnO4^-(aq),Mn^2+(aq)|Pt(s)

49. Biology

The trachea is ___________ to the lungs Toes are _______________to the shoulders Esophagus is _____________ to trachea Pinna is ______________ to tail Liver is ______________ to stomach Options are Anterior, Posterior, dorsal, ventral, lateral, median,

I lost my paper for the Math Riddle Pizazz page 167 about solving systems of equations and I no longer have the problems. (It is the "did you hear about the farmer who fed his cows birdseed.." page) What are the math problems for it?!?

51. pre-calculus

please help me with thisone thanks solve the inequality algebraically. Express the solution in interval notation. (x-8)^2/x^2-36 > 0

52. math

There are nine equally likely outcomes if you spin this spinner twice (x,y,z) 1) Three of the 9 equally likely outcomes are xx,yy and zz. List the other six outcomes. 2) If you spin the spinner three times, what is the probability of getting yyy? Explain

53. Physics

An ideal transformer is needed to step the voltage down from 400V to 115V. The primary has 400 turns. How many turns would be necessary on the secondary side?

54. SraJMcGin

Thanks a lot for your previous help with my assignments, and I have Windows. I don't know how to make accent marks:\

55. Chemistry

If you react 55g of hydrazine and 55g of oxygen gas, what is the maximum moles of nitrogen dioxide gas that can be made and what is the limiting reagent?

56. Math

Confused on permutation or combination on this question: A VISA credit card has a first digit of 4 followed by 15 other digits. How many different VISA accounts does this allow? I know the formulas but I am having a hard time determining which one to use.

57. physics

How much exertion in pounds does it take a woman who weighs 115 pounds to push a cart that weighs 50 pounds?

¿Cuenta en español? Si, yo cuento en español. ¿Puedes contar en francés? No, no puedo contar en francés.

59. math

what is dimensions of an acre? and size of football field?

60. science

when a liquid wax is turned into a solid is it a chemical reaction?

61. chem

under what condition would all three hydrogen be removed the H3PO4?

62. physicssssss

In a cargo plane, the center of gravity must be between the front and rear landing gears in order to maintain a torque equilibrium. The front landing gears help counteract the torque provided by the rear landing gears in this case. A jet transport has a

63. physiC

A uniform door (0.81 m wide and 2.1 m high) weighs 150 N and is hung on two hinges that fasten the long left side of the door to a vertical wall. The hinges are 1.9 m apart. Assume that the lower hinge bears all the weight of the door. Determine the

64. GERMAN

Are the wechsel articles always dativ? -------------------------------------- 1)Die Zigaretten liegen ____ Boden(ON THE) 2)Mein Hemd steht____Bett(near the) 3)Sein Fahrrad ist____Fenster 4)Onkel liegt ______Sofa(on the) ------------------------------

65. math-163

for the polynomial, list each real zero and its multiplicity. determine whether the graph crosses or touches the x-axis at each x-intercept. f(x)=1/2x^4(x^2-5)(x+1)

66. Chemistry

HELP! I need to know if I am getting the right equation for the oxidation reaction of cyclohexene and potassium permanganate? I think it would be: C6H10+KMNO4 would become C6H10(OH) + MNO2 + K

67. statistics

there are 80 students in a math class.20% of the students in the class scored above 50 marks in the test. what is the average of those students who scored below 50 marks

68. Algebra

Explain the advantages of the vertical and horizontal methods of multiplying a binomial and a trinomial.

69. math163

Please i need all the process.. thank you.. for the polynomial, list each real zero and its multiplicity. determine whether the graph crosses or touches the x-axis at each x-intercept. f(x)=1/2x^4(x^2-5)(x+1)

70. Algebra

Can you write a binomial in standard form with a degree of 0? Can you write a binomial with a degree of 3? Explain.

71. physics

formulation of hypothesis for the prepation of a standard solution of oxalic acid with a concentration of 0.05mol.dm3. very desperate

72. cambo

180 ft long board is cut into 3 pieces. The second piece of board is twice as long as the first. The third piece of board is six times as long as the first. What is the length of the first piece of the board?

73. IT WEB SYSTEMS

Provide a real-life application in which you manipulate data in string or array format. Describe the situation, manipulation process, and data result.

74. IT/210

Design a program that models the worms behavior in the following scenario: A worm is moving toward an apple. Each time it moves, the worm cuts the distance between itself and the apple by its own body length until the worm is close enough to enter the

75. physics

if |A|=2, |B| =4, |C| =5, find the vector sum a+b+c in ordered pair notation, also find the angle theta

76. physics

if |A|=2, |B| =4, |C| =5, find the vector sum a+b+c in ordered pair notation, also find the angle theta

77. IT/210

Assignment: Currency Conversion Design · Complete the hierarchy chart in Appendix H and the flowcharts in Appendix I, based on the Currency Conversion requirements and Input-Process-Output table you generated in Week Two. · Develop the pseudocode for the

78. physics

A merry-go-round is stationary. A dog is running on the ground just outside its circumference, moving with a constant angular speed of 0.705 rad/s. The dog does not change his pace when he sees what he has been looking for: a bone resting on the

79. algebra

Find the functional values f(-2), f(0), and f(1) for the function. ƒ(x) = X²- 1

80. physics

A merry-go-round starts from rest and accelerates uniformly over 29.0 s to a final angular velocity of 5.35 rev/min. (a) Find the maximum linear speed of a person sitting on the merry-go-round 4.50 m from the center. (b) Find the person's maximum radial

81. Physics

The force on an object is described as a function of time equation: F(t) = 3t^2+7t What is the impulse delievered by the force over a period of time from 0 to 5.0s? What is the average force exerted on an object over this time period? If the object has a

82. Algebra

I am stuck in exponential growth and decay. Here is an example. Can someone tell me how to do this step-by-step please? Here it is... The population of Mexico has been increasing at an annual rate of 1.7%. If the population of Mexico was 100,350,000 in the

83. physics

A baseball mass of 150.0g, is thrown by the pitcher toward the home plate with a velocity of 45.0 m/s. it is hit back at the pitcher with a velocity of 60.0 m/s, what is the average force on the bat, if the ball and bat are in contat for a time of 100.0

84. algebra

Find the functional values f(-2), f(0), and f(1) for the function. ƒ(x) = x² - 1

asked by bianca, pleeease help i'm lost
85. math 117

multiply and simplify 10b^6/3r^2 x 9r^7/100b

86. math

Two planes depart from the same airport at the same time. One hour later one of the planes is 480 miles due north of the airport and the other plane is 550 miles due east of the airport. At that time, what is the distance between the two planes?

87. math

Chris eats 3 slices of a pizza that is cut into 8 equal slices. What percentage of the pizza does he eat?

88. Statistics

The probability that a football game will go into overtime is 20%. What is the probability that two of three football games will go to into overtime? A) 0.384 B) 0.2 C) 0.04 D) 0.096

89. Statistics

The probability that a house in an urban area will develop a leak is 5%. If 82 houses are randomly selected, what is the probability that none of the houses will develop a leak? A) 0.050 B) 0.001 C) 0.000 D) 0.015

Could someone check these please?I had place a possessive adjective in place of el 1. El hermano de Juan y Pedro se llama Bret Answer: Su hermano se llama Bret 2.Replace los with possessive Los hermanos de Paco y Linda se llama Santiago y Jose Answer: Sus

91. science

After 0.6523 g of CoCl_{2} \cdot 6H_{2}O is heated, the residue has a mass of 0.3423 g. Calculate the % H2O in the hydrate.

The general term for market structures that fall somewhere in-between monopoly and perfect competition is?

93. Physics

Please help! suppose you have some 20 degrees celsius water and some boiling water. How much of each would you use to make 4 kilograms of water at 45 degrees celsuis?

94. calculus

Please help with this. I submitted it below but no one responded. I need the first derivative of f(x)=4(x+ then the square root to include (x(8-x)), then close bracket.And then the second derivative of this to show by the second derivative test that it is

95. mth

PLEASE I NEED HELPPPPP.. i have many exercises like that, just want to know where to start thanks. f(x)= x^3+2x^2-x-2 / x^2+x-6 find: 1. domain 2. symmetry or not 3. determine if f(x)is: a)in lowest trem b)proper/improper 4. x-intercepts, y-intercepts 5.

96. math

The opposite angles of a parallelogram are congruent. The adjacent angles are supplementary. If angle X measures 110 degrees, then what are the measures of angle Y and angle Z?

97. Chemistry

80.0 grams of KBr is mixed with sufficient water to prepare 1865 mL of solution. This solution is then mixed with 46.3 mL of 0.425 M KCl solution. 12 mL of this mixture is subsequently added to 61.0 mL of distilled water. Calculate the molarity of K+ ions

98. Physics

A bullet of mass 3.2 g strikes a ballistic pendulum of mass 3.6 kg. The center of mass of the pendulum rises a vertical distance of 13 cm. Assuming that the bullet remains embedded in the pendulum, calculate the bullet's initial speed.

100. rounding fractions

Round 10 2/3 to the nearest whole number?

what are the 10 most critical issues challenging human services agencies today?

102. geometry

what is the angle of inclination for 7x + 3y = 9?

103. economics today

Suppose the economy has been experiencing zero inflation and five percent unemployment for several years. The government decides to lower the unemployment percentage by generating some inflation. You need to do the following:

104. physics

At a time when mining asteroids has become feasible, astronauts have connected a line between their 3740-kg space tug and a 6500-kg asteroid. They pull on the asteroid with a force of 470 N. Initially the tug and the asteroid are at rest, 480 m apart. How

105. math

find the length width and area of an object where the perimeter is fixed at 20 meters

106. chemistry

You have a 12.01 g sample of carbon. The average mass of a carbon atoms is 1.994 x 1023 g. How many carbon atoms are in the sample?

I'm really bad at these, can someone help me PLEASE? 1. Name the property shown by the statement: 9x + 0 = 9x a. Commutative Property of Addition b. Commutative Property of Multiplication c. Identity Property of Addition d. Identity Property of

108. Physics

conical pendulum is formed by attaching a 0.200 ball to a 1.00 -long. It has a radius of 40.0cm . What is the tension in the string?

109. Physics

conical pendulum is formed by attaching a 0.200 ball to a 1.00 -long. It has a radius of 40.0cm . What is the tension in the string?

110. cal

Let f(x)=-5e^(x+1)+e^8 . find f'(0)

111. cal

The circumference of a sphere was measured to be 86.000 cm with a possible error of 0.5 cm. Use linear approximation to estimate the maximum error in the calculated surface area and Estimate the relative error in the calculated surface area.

112. psychology

If you had to argue that either genetics (nature) or environment (nurture) has the greater impact on human development, which would you pick and why?

113. hardware

Hi i'm just stuck on this question. can please someone help me. Three cortrect ones are: A) A 9-bit word represents twice as many code words as an 8-bit word. B) mp4, mpg and bmp are all examples of video file extensions. C) A data rate of 4 gigabits per

114. chemistry

A sample containing .187 g cl is dissolved in 50.0 mL water. How many moles of cl ion are in the solution? what is the molarity of the cl ion in the solution?

115. software

Compton, R. 2010 SOA explained Retail Management vol. 14 no. 6, June pp. 29–32 which one is correct: A Fully correct B Incorrect because one start tag missing C Incorrect because one closing tag missing D Incorrect becausea/ missing inaclosing tag E

116. chemistry

A solution is prepared by dissolving 25.0 g of ammonium sulfate in enough water to make 100.0 mL of stock solution. A 10.0 mL sample of this stock solution is added to50.0 mL of water. Calculate the concentration of ammonium ions and sulfate ions in the

117. math

PLEASE I NEED HELPPPPP.. i have many exercises like that, just want to know where to start thanks. f(x)= x^3+2x^2-x-2 / x^2+x-6 find: 1. domain 2. symmetry or not 3. determine if f(x)is: a)in lowest trem b)proper/improper 4. x-intercepts, y-intercepts 5.

118. Pre-Algebra:HELPPP

Factor: y^3-3y the ^ is an exponent is the answer y(y^2-3)

119. calculus

PLEASE HELP! Transform polar equation to an equation in Cartesian (rectangular) coordinates. Then identify where it locate on the graph. r sin θ = 4

120. calculus

PLEASE HELP! Transform polar equation to an equation in Cartesian (rectangular) coordinates. Then identify where it locate on the graph. r sin θ = 4

121. Psychics

Bradley, working in his 23 C kitchen, is cooking himself a crepe in an iron skillet that has a circular bottom with a diameter of .30 m. How hot must the skillet be in order for Bradley to make a 710.3 m^2 crepe that just fills the bottom of the pan?

122. algebra/trig

solve: ln12x = 6

123. physical science

a 180 lb person climbs a ladder to a point which is two times the radius of the earth high. how much does he weigh there?

124. physics

a pitcher throws a 0.50kg ball of clay at a block of wood. the clay sticks to the wood on impact, and their joint velocity afterworks in 3.0m/s. what is the original speed of the clay

125. physical science

At the bottom of a well one quarter of radius of the earth deep your weight compare to your normal weight would be

126. statistics

A physical fitness association is including the mile run in its secondary-school fitness test. The time for this event for boys in secondary school is known to possess a normal distribution with a mean of 440 seconds and a standard deviation of 60 seconds.

127. english

In the sentence: Then within two years, King Uther fell sick of a great malady. The word within is a/an: A. verb B. preposition C. pronoun D. adverb I'm stuck between B and D. help? Thanks!

128. Organic Chemistry

what is the major product if 2,3,3-trimethylpentane was mixed with IBr?

129. math

how do i rename mixed nimber in simplest form.15/8

130. physics

A 23.0 kg box is released on a 39.0° incline and accelerates down the incline at 0.268 m/s2. Find the friction force impeding its motion.

131. math

how do I solve (.5x?)-1.4=.85

132. Math

Subtract $259.60 from$300 can you work it out for me, im having a hard time.

133. Physics

A closed organ pipe 0.8 m long has a diameter of 7.0 cm. The air in the church is 15oC. What is the fundamental frequency? If the heat is turned up to 20oC, what is the new fundamental frequency? - HELPHELPHELP

134. physics

Two automobiles of equal mass approach an intersection. One vehicle is traveling with velocity 15.5 m/s toward the east and the other is traveling north with speed v2i. Neither driver sees the other. The vehicles collide in the intersection and stick

135. physics

Two charges are separated until they are a distance of 191 cm apart, causing the electric force between them to increase by a factor of exactly 5. What was their initial separation distance?

136. chemistry

How much heat is required to convert 0.4 kilograms of ice at 0 degrees celsius to water at the same temperature?

137. College Algebra

f (x) = - X3 +112 - 8x+7 find f(-2)

138. Science

A new organism is found that is multicellular, does not have a backbone, and has six legs. How would you classify this organism?

139. chemistry

50ml of water at 46.9 C were mixed with 50ml of water at 25.1 C in a calorimeter also at 25.1 C. The final temperature was 30.1 C Assuming that neither the density of water nor its specific heat capacity change with temperature, calculate the total heat

140. chem help urgent!

i only have one submission for these and i dont' really know how to tell which one has the higher boiling point. can you help? Of each pair of solids, which one has the higher melting point? Kr(s) or Cu(s) and.. CCl4(s) or SiCl4(s)

141. Calc

"Let f(x,y)=2(x^2)y-(y^3)+x-4. a) Find the local linearization of f at (3,1) b) Compute the directional derivative of f at (3,1) in the direction towards the point (-2,3). At (3,1), is the function f increasing or decreasing in the direction towards the

142. physics

The table shows the power ratings of four electrical appliances. Fan heater 2 kW Oven 3 kW Kettle 2 kW Microwave oven 0.75 kW The kettle is used for a total of 30 minutes a day. It has an efficiency of 0.9 What is the cost of the energy wasted by the

143. science

the specific heat of sliver is 0.235j /g.c. how much heat is neeeded to raise the tempreature of an 8 gram sliver ring be 50 degrees celecius

144. science

tori wants to increase the tempreature of 500 grams of water from 20 degrees celcius to 100 degrees celecius if the specific heat of water is 4.18j/g. degrees celcius how much heat is needed ?

145. science

gold has a specific heat of 0.130j/g. degrees celcuis if 195 joules of heat are added to 15 grans of gold homw much does the tempreature of the gold change

146. science

a plastic container witha mass of 30 grams gains 1,140 joules of heat if the tempreature of the container increases 20 degrees celcius what is the specific heat of the plastic in the container

147. science

a sliver coin and a gold coin each have a mass of exactly 6.6 grams the specific heat of sliver is 0.235j/g.degrees celcius and the specific heat of gold his 0.130j/g. degrees celcius what coin requires more heat to raise its tempreature by 40 degrees

148. physics

a karate chop delivers a force of 3000 N to a aboard that breaks. the force that the baord exerts on the hand during this event is A. Less than 300N B. 3000 N c. Greater than 3000N d. need more info

149. Statistics

A typist at a constant speed of 65 words per minute makes a mistake in any particular word with probability 0.06, independently from word to word. Each incorrect word must be corrected, a task which takes 14 seconds per word. Find the mean of the time (in

150. Physics II

Jose, whose mass is 75 kg, has just completed his first bungee jump and is now bouncing up and down at the end of the cord. His oscillations have an initial amplitude of 11.0 m and a period of 4.0 s. From what height above the lowest point did Jose jump?

151. statistics

A simple random sample of size n = 300 is obtained from a population whose size is and whose population size is n=20,000 ans whose proportion with a specified characteristic is p=0.8. Describe the sampling distribution of P^. A) Approximately normal; ìp =

152. chemistry

What do you expect when you mix 1M Na2SO4 with 1M CaCl2?

153. algebra

Find the functional values f(-2), f(0), and f(1) for the function. ƒ(x) = x² - 1

asked by bianca, pleeease help i'm lost
154. Physics

conical pendulum is formed by attaching a 0.200 ball to a 1.00 -long. It has a radius of 40.0cm . What is the tension in the string?

155. MATH probability

A pair of dice is cast. What is the probability that the sum of the two number landing uppermost is less than 5, if it is known that the sum of the numbers falling uppermost is less than 7?

156. Calc

"Consider the surface given by 4x^2-y^2+5z^2-10z=55. a) Find all points on the surface at which the tangent plane is parallel to the plane 8x+y+15z=1. b) Pick one of these points and give the equation of the tangent plane to the surface at that point."

157. question

A temperature of 41 degrees F is equivalent to 278.2 degrees K, while a temperature of 86 degrees F is equivalent to 303.2 degrees K. Find the equation converting Kelvin temperature to Fahrenheit. What is the Fahrenheit temperature when it is 180 degrees

158. Medical Office Asst

On the ADA for Keith Konklin, the number 333-2589 should be placed in block A( #7 B) # 18 C0 # 19 D) #31

when a disaster hit an area, the costof everything, food, water, housing, gas, and so forth, seems to go up immediately. Explain why this phenomenon say be a good thing using the laws of supply and demand?

160. Trig

Use Trig identities to verify that sec^4(x)-tan^4(x)=1+2tan^2(x), Only work with one side of the equation

161. chemistry

____ 14. Adding a charged particle common to two solutes decreases solute concentration. This observation demonstrates a. the common-ion effect. c. hydrolysis. b. Le Châtelier's principle. d. buffering.

162. Science

How does the movement of electrons and protons create large amounts of energy in oxidative phosphorylation?

163. Science

how do oxidation-reduction and phosphorylation reactions drive the glycolytic pathway?

164. SOC 120

Hello I am looking for some help on some examples of Deviant human behaviors that are in one society but not considered in another society? I am stuck? Any suggestions you might recommend?

165. Chemistry

A cubic piece of metal measures 7.50 cm on each edge. If the metal is nickel, whose density is 8.90g/cm^3, what is the mass of the cube?

166. chemistry

A 1.04L sample of gas at 759 mm Hg pressure is expanded until its volume is 2.24L. what is the pressure in the expanded gas sample (at constant temp.)

167. history.

Who dominated the South's politics?

168. physics

A door starts from rest and swings with an angular acceleration, alpha, α = 6 rad/s2, where t is in seconds. Determine the angle in radians through which the door turns in the first 3 s. Hint: kinematics equation for angular position (i.e., angle) is

169. Physics

conical pendulum is formed by attaching a 0.200 ball to a 1.00 -long. It has a radius of 40.0cm . What is the angular velocity of the ball if the tension in the string is 2.14N?

170. Microbilogy

Albert Kluyver "From elephant to...bacteria-it is all the same!" What did he mean?

171. Microbiology

The ability of farmers around the world to produce crops such as corn, wheat, and rice is often limited by the lack of nitrogen-based fertilizer. How might scientists use Beijerinck's discovery to increase world supplies of grain?

172. Physics

A 1550 kg automobile has a wheel base (the distance between the axles) of 3.00 m. The center of mass of the automobile is on the center line at a point 1.10 m behind the front axle. Find the force exerted by the ground on each wheel. force on each rear

173. Math

Anita says the plus sign + forms 2 pairs of vetical angles. Charles says it forms 2 pairs of congruent angles? Who is correct, and why? Wouldn't it be both, because there are 2 pairs of opposite angles with the same measure, and 4 congruent angles.

174. calculus

Determine the values of a and b for the function f (x) = ax^3 + bx^2 + 3x - 2 given that f (2) = 10 and f ′(-1) = 14. Please help, Thanks!

175. english

why are string puppets harder to make &use than finger puppets?

176. geometry

triangles ABC and XYZ are congruent. Angle A is one half the size of angle B. Angle Y is 90 degrees. Angle C and angle Z are both 45 degrees. what is the measure of angle A.

177. English

How Did Patria Mirabal foreshadow in the book " In the time of a butterflies" ?

204. health

Define incidence rate and incidence proportion. Identify the differences

205. science

One direction of movement of buildings from earthquake vibrations is? Hint...its a 9 letter word

1 + tan^2 (5) - csc^2 (85) = ? Would this equal 0 could someone explain this to me and the correct answer?

207. physics

a) What is the minimum work needed to push a 900 kg car 410 m up a 17.5° incline with zero friction? If i know this answer is 1.08e6 what equation should i use for the next part because the one i used was wrong (b) What is the minimum work needed if the

208. math

determine limit √3, √(3√3), √(3√(3√3))

209. medical billing

which health nsuane program is designed to complement the retiremet survivor and disabiity insurance enacted under title 11 of the social security act

210. math

Ashley can ride her bike to work in 2/3 of an hour. When she drives to work it takes 1/3 of an hour. If she drives 12 miles per hour faster than she rides her bike, how fast does she ride her bike?

211. psychology

I need an example of how one domain of development impacts the other two.

212. high school chem 1

2Fe(OH)3 + 3H2SO4 -> Fe2(SO4) + 6H2) How many molecules of H2O can be produced from 350 liters of NH3?

213. English

where can i find help about direct and indirect objects

214. Preclaculus Help Another

cot(40) - ((sin(50))/(sin(40)) = ? I thought the answer might be 0, but I'm not quite sure. please provide steps, too.

215. High school chem 1

4NH3(g) + 5O2(g) -> 4NO(g) + 6H20(g) what mass of H2O can be produced from 350 liters of NH3?

216. math

Find the rule for the sequence: 4.2, 2.6, 1, -.06, -2.2

217. Science

Suppose the partial pressure of one gas in a mixture decreases by 5 kPa. How does this change affect the total prelssure of the mixture?

218. math

Find the rule for 9,16.8, 24.6, 32.4

219. Stoichiometry

How man liters of hydrogen should have been collected by reacting .045 grams of magnesium?

220. Math

24x - 10 = 18x - 4. Please I need operations for this equation

221. High School chem 1

2Fe(OH)3 + 3H2SO4 -> Fe2(SO4)3 + 6H2) Question: How many molecules of H2O can be made from 9.21 x 10^22 molecules of H2SO4?

222. physics

A 77 g arrow is fired from a bow whose string exerts an average force of 95 N on the arrow over a distance of 81 cm. What is the speed of the arrow as it leaves the bow?

223. geometry

A wheelchair ramp has a rise from the ground of 1 foot. The ramp has a length of 14 feet. To the nearest degree, find the angle the ramp makes with the sidewalk.

224. math

if 65% of students are wearing t shirts and 48% are wearing jeans is this possible? Please explain.

225. math

can 25% of something be greater than 50% of something else? Please explain.

226. chemistry

A reaction mixture is in a 5.4 L flask at 25 oC initially contains only 7.64 grams of acetic acid. (CH3COOH). Set up your I.C.E. table and use it to answer the following questions. HINT: You will need to look up the Ka for this equilibrium reaction.

227. chemistry

a tank contains 2.6 mol of nitrogen and 1.3 mol of oxygen. If 0.65 mol of oxygen were added to the tank, what effect would this have on the pressure in the tank?

228. Math

I have no idea how to do this problem: Select the expression below that is equal to 4(9-m). A. 4m-36 B. 13-m C. 36-m D. 36-4m

229. physics

If a 9800kg train car traveling at 15m/s impacts another train car at rest and after the impact the 2 are going 6m/s. What is the mass of the second train car?

230. math

Write a rule for thenth term for the following sequence: 2/3, 4/4, 6/5, 8/6, ... I know the next term is 10/7 but I don't know how I got it

232. algebra

a truck has a diameter of 25 inches. a tack is stuck on the bottom of the tire. if the truck travels one mile, how many times will the tack touch the road?

233. chemistry

What volume at STP would be required to react with 0.100 mol of hydrogen to produce ammonia?

234. Algebra 2

Just checking to see if I got this right. Thanks, (3x^4--8x^2 -3x-3) / (x^2-3) 3x^2+1 remainder -3x

235. science

a 100.0 gram metal sample is heated to a temperature of 110 degrees celcius then placed into a calorimeter containing 100.0 r of pure water (at initial temperature of 23 degrees celcius). after the sample and water reach thermal equalibrium, their final

236. geometry

what is the area of this trapezoid if the angles are 11in,9in,and 3in

237. Math

A basketball team scored 48 baskets in 1 game. Each basket was worth one or two points. If the team scored 84 points, how many one- point and two-point baskets did it score?

239. statistics

The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures students' study habits and attitudes toward school. Scores range from 0 to 200. The mean score for college students is about 115.8, and the standard deviation is about

240. French

I'm supposed to come up with something in the imparfait that begins with "Quand j'étais petite, ... but my vocabulary is very limited so I don't really know what to write. Any suggestions?

241. Statistics

The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures students' study habits and attitudes toward school. Scores range from 0 to 200. The mean score for college students is about 119, and the standard deviation is about

242. statistics

How heavy a load (pounds) is needed to pull apart pieces of Douglas fir 4 inches long and 1.5 inches square? Here are data from students doing a laboratory exercise: 22565 28373 25826 26468 27508 23401 24998 32436 25405 29235 29679 33661 27775 28517 30371

243. math

Hitomi has a total of 30 red and blue bowling balls at her bowling alley. Each red ball weighs 8 lb. each blue ball weighs 9 lb. If the total mass of the blue balls is 49 lb. heavier than the total mass of the red balls, how many red balls does she have???

244. Science (NO WEBSITE has it)

What boundary did the Prince William Sound earthquake have? (transform, divergent, convergent.)

245. statistics

The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures students' study habits and attitudes toward school. Scores range from 0 to 200. The mean score for college students is about 115.8, and the standard deviation is about

I have two questions: If a parallelogram is a rhombus, then the diagonals are congruent- I don't think so in all cases-they can bisect each other and are perpendicular, correct but not necessarily congruent so this should be false? Secondly, A kite is a

247. math

a circular coin has a radius of 8.2 mm. What is its circumference ,rounded to the nearest tenth?

248. chem

Indicate the type of crystal (molecular, metallic, covalent-network, or ionic) each of the following would form upon solidification. 1. B

249. Physics

An object moves from the position (1,3,-5) to position (-1,4,8) during time 8 s. what is the average velocity?

250. math

You are playing a card game with a deck of 52 cards.You win if you draw a red card that is a multiple of 5.What are your chances of winning on your first draw?

251. Physics

an object moves from the position (1,3,-5) to the position (-1,4,8) during time 8 s. what is the average speed?

252. Religion

What is the best definition of the Belief perspective? My book does not define it just relates Ultimate Reality existance to it. Thank you for bring a clear understanding to me.

253. math

Perform the indicated operation and, if possible simplify. 7/12+(-3/5)

254. Physics

A car is traveling a road that makes quarter of a circle with a constant speed. What is the magnitude of the average velocity of the car?

1 + tan^2 (5) - csc^2 (85) = ? Would this equal 0 could someone explain this to me and the correct answer?

256. Math algebra

A 120- foot long rope is cut into three pieces the first piece of rope is twice as long as the second piece of rope the third piece of rope is three tines as long as the second piece of rope what is the length of the longest piece of rope?

257. math

i still don't get it ms sue for 3.14 x 16.4 it will equal .376 not 51.996

258. Physics

Please Help! An object at 20 degrees Celsius with heat capacity 100 calories/Celsius is placed in 40 grams of water at 100 degrees Celsius. After equilibrium is reached, the object is removed from the hot water and placed in 200 grams of water at 0 degrees

259. chemistry

A 6.0 L flask contains a mixture of methane, argon and helium at 45 degrees C and 1.75 am. If the mole fractions of helium and argon are 0.25 and 0.35, respectively, how many molecules of methane are present?

260. Physics

Please help! Suppose that a 400 gram copper object (specific heat 0.092 cal/g/degrees Celsius) receives 900 cal. of heat. What is the temperature change? Explain your reasoning. Do not use algebra Thanks!

261. math

given an 8 foot by 10 foot wall how many 6 inch square tiles would be needed to cover the wall

262. Physics

Suppose equal volumes of iron and water interact thermally. Which will change temperature more? If they are initially 30 Celsius degrees apart in temperature, how much will the temperature of each change? Explain your reasoning. Thanks!

263. math

a circular coin has radius of 8.2 what is the circumference rounded to the nearest tenth? please show work

264. Chemistry

What volume at nitrogen would be required to react with 0.100g of hydrogen to produce ammomia?

265. math

a percan pie 40 ft in diameter was baked in oklahoma,in 1989. What was the pie circumference ,rounded to the nearest foot? plz shoe work

266. Math

why does tan(-120) = - 0.71312301 and not sqrt 3 ? I tried making a graph and still came up with sqrt 3??

267. Physics

Two stones are thrown vertically up with initial velocity Vo, second stone with a time delay To with respect to the first one. At which time after the beginning of the motion the two stones will collide? Is this scenario possible for any Vo and To? What

268. math

a circular track has a radius of 100ft. elena wants to run 2 miles. There are 5,280 ft in a mile. Can you find the circumference of a circle if you know the radius? explain your answer

269. high school chem 1

Equation: 4NH3(g) + 5O2(g) -> 4NO(g) + 6H2O(g) question: What volume of NH3 is needed to react with 71.6 liters of oxygen?

270. math

A drawer contains 7 black socks, 5 white socks, and 3 brown socks. What is the probability that 2 white socks will be removed in succession?

271. helppppp :)

how can we help african people who is having a hard time with poverty? :)

272. Chem molarity

A beaker contains 100 grams of 1.20 M NaCl. If you transfer 50% of the solution to another beaker, what is the molarity of the solution remaining in the first beaker?

273. Chemistry

What volume at nitrogen would be required to react with 0.100g of hydrogen to produce ammomia?

asked by i dont know how to set it up!
274. Chemistry

What volume at nitrogen would be required to react with 0.100g of hydrogen to produce ammomia?

asked by i dont know how to set it up!
275. algebra

what is an example of a function that you might encounter in everyday life and describe its domain and range.

276. Calculus

Find the derivative of F(z)=3+cos(2z-1)

277. Physics

A ship crosses a river aiming at the angle è to the left from the straight course. The speed of the ship with respect to water is v'. The width of the river is d and the water velocity is u to the right. What will be the side displacement h of the ship as

278. algebra

what is the slope of a line parallel to y=1/2x+2.3

279. chemistry

What volume at nitrogen would be required to react with 0.100g of hydrogen to produce ammomia? I need help setting it up!

asked by i dont know how to set it up!
280. chemistry

What volume at nitrogen would be required to react with 0.100g of hydrogen to produce ammomia? I need help setting it up!

asked by i dont know how to set it up!
281. chemistry

What volume at nitrogen would be required to react with 0.100g of hydrogen to produce ammomia? I need help setting it up!

asked by i dont know how to set it up!
282. agebra

simplify -14xy / 42x^5y^8

283. chemistry

A pair of students performs an experiment in which they collect 27 g CaO from the decomposition of 41 g CaCO3. Are these results reasonable? Explain your answer using percentage yield.

284. biology

A question in Campbell's 8th edition study guide for AP Biology says: A multifactorial disorder _. Answer: has a collection of symptoms traceable to an epistatic gene. There is another answer choice which says : has both genetic and environmental causes.

304. Math

blank is a polynomial, you would write the polynomial as a product of factors?

310. Math

Tennis balls withal diameter of 2.5 in. Are sold in cans of three. The can is a cylinder. What is the volume of the space in the can not occupied by tennis balls? Assume the balls touch the on the sides,top and bottom.

311. precalculas

The doubling period of a baterial population is 20 minutes. At time t=100 minutes, the baterial population was 80000. What was the initial population at time t=0? Find the size of the baterial population after 4 hours.

312. Physics

A gunman shoots from a riffle in a horizontal direction without correcting for gravity. How much below the intended target, at a horizontal distance, will the bullet strike if its initial speed is Vo??

313. pre calc

find the exact values of the six trigonometric functions of theta if the terminal side of theta in standard position contains the given point: 1. (8, 4) 2. (4, 4√3) 3. (0, -4) 4. (6, 2)

314. precalc

Find the exact values of the six trigonometric functions of theta if the terminal side of theta in standard position contains the given point: 1. (8, 4) 2. (4, 4√3) 3. (0, -4) 4. (6, 2)

315. pre calc

find the exact values of the six trigonometric functions of theta if the terminal side of theta in standard position contains the given point: 1. (8, 4) 2. (4, 4√3) 3. (0, -4) 4. (6, 2)

316. math

use the four digits 3 4 5 6 exactly once each to form a division problem which has a quotient of 0.08 write the appropriate division problem

317. MATH

I'm doing a proportion fora problem. Would it be $/ft = ft/x or$/ft = x/ft

318. biology

what forms between the other two primary tissue layers

319. bio

You have a sample of NaCl that contains 100 mg/ml NaCl. You are trying to perform an reaction that requires 10ml of 20 mg/ml. Enter in the correct amount (in ml) of Stock NaCl solution you need to use to make 10ml of 20 mg/ml NaCl

x/2-4=-5

321. math

x/4-4=3x/4-6 plz show step by step

322. Math

I'm doing a proportion for a problem. Would it be $/ft = ft/x or$/ft= x/ft

323. Math

Simplify the following expression, and rewrite it in an equivalent form with positive exponents. -14xy / 42x^5y^8

324. math

if a octagon has a perimeter of 88 centimeters, what is the measure of each of its sides?