# Questions Asked onSeptember 30, 2014

1. ## p.e

MyPlate was created as a tool to help the average American eat one healthy meal a day. True False*** I think the answer is False am I right? Thanks

2. ## Math

1.)which two sq roots are used to estimate 5? a.)1 & 2 b.)2 & 4 ****** c.)4 & 9 d.)9 & 16 2.)which two sq roots are used to estimate 43? a.)25 & 36 b.)36 & 49***** c.)49 & 64 d.)25 & 64 3.)an estimate for the sq root of -66 is? a.)-6 b.)-7 c.)-8***** d.)-9

3. ## Physics

You want to use a rope to pull a 12-kg box of books up a plane inclined 30∘ above the horizontal. The coefficient of kinetic friction is 0.29. The rope pulls parallel to the incline. What force do you need to exert on the rope if you want to pull the box

4. ## chemistry

Complete and balance each of the following equations. K2SO4(aq)+BaBr2(aq)→ Would it be K2SO4(aq)+BaBr2(aq)→K2Br2 +SO4Ba? Express your answer as a chemical equation. Enter no reaction if no precipitate is formed. (How can we know if a solid is formed in

5. ## Urgent--Spanish help! :(

6. Which Spanish city is known for the fact that people of three different religions peacefully lived there together? Avila Madrid Segovia Toledo 7. How would you express your agreement with the following statement? No me gusta equiar. Pues, me gusta

6. ## physics

Suppose a vector V⃗ makes an angle ϕ with respect to the y axis.What could be the x and y components of the vector V⃗ ? Express your answers in terms of the variables V and ϕ separated by a comma.

7. ## College Algebra

Jen recently rode her bicycle to visit her friend who lives 12 miles away. On her way there, her average speed was 10 miles per hour faster than on her way home. If Jen spent a total of 1 hour bicycling, find the two rates.

8. ## Stat

Thirty randomly selected students took the calculus final. If the sample mean was 89 and the standard deviation was 6.2, construct a 99% confidence interval of the mean score of all students. Assume that the population has a normal distribution. what

9. ## Chem Help!

The presence of 11-cis retinal, C20H28O, in cells in the eye is important for vision. The structure of retinal includes an aldehyde group, a cyclohexene ring and a long aliphatic side chain, in which a carbon-carbon double bond exists between carbons

10. ## analytic geometry

A forest ranger in a 120ft observation tower sees a fire. The angle of depression to the fire is 3.5. What is the horizontal distance between the tower and the fire

11. ## physics

This graph in the figure (Figure 1) shows how the temperature of an initially solid sample changes as time goes by when it is placed above a flame that delivers a constant heating power (that is, a fixed amount of energy input in the form of heat each

12. ## math models

The Sears Tower in Chicago is 1454 feet high. Sketch and find the angle of elevation from a point 750 feet from the base to the top of the tower. Relate your answer to the nearest tenth. a. 62.7º b. 27.3º c. 31.1º d. 58.9º

13. ## Chemistry

Silicon carbide, commonly known as carborundum, is a very hard and abrasive substance. The compound is prepared by heating silicon dioxide in the presence of graphitic carbon: SiO2(s) + 2C(s) --> SiC(s) + CO2(g) How many grams of silicon carbide can be

14. ## Chemistry

Identify the following chemical equations by type. 1. If an electric discharge produces 800 cm3 of ozone (O3), how many cm3 of oxygen (O2) are required? 3O2(g) ---> 2O3(g) 2. When 75.0 dm3 of O2 react with an excess of glucose (C6H12O2), according to the

15. ## MATH

SASHA AND FRANCISCO WERE SELLING LEMONADE FOR \$.25 PER HALF CUP AND \$.50 PER FULL CUP. AT THE END OF THE DAY THEY HAD COLLECTED \$15 AND HAD USED 37 CUPS. HOW MANY FULL CUPS AND HOW MANY HALF CUPS DID THEY SELL?

16. ## Chemistry 30

Consider the following reaction at equilibrium: 4NH3(g) + 5O2(g) ↔ 4NO(g) + 6H2O(g) In what direction will the following changes force the reaction? a) Addition of O2 b) Reduction of the amount of water vapour c) Increase in the pressure d) Decrease in

17. ## physics

You are in a hot-air balloon that, relative to the ground, has a velocity of 5.40 m/s in a direction due east. You see a hawk moving directly away from the balloon in a direction due north. The speed of the hawk relative to you is 1.05 m/s. What are (a)

18. ## chemistry

10 ml sample of vinegar an aqueous solution 0f acetic acid( HC2H3O2) is titrated with 0.5062 M and 16.58 ml is required to reach equivalence point what is the molarity of the acetic acid b. if the density of vinegar is 1.006 g/cm3 what is the mass percent

19. ## Science 1 quick question

Suppose monerans lost the ability to fix nitrogen. How would this affect other organisms?

20. ## CHEM

A 1.000g mixture of As4S6(s) and As4S4(s) was burned in excess O2. The products were As4O6(s) and SO2(g). The solid product had a mass of 0.905g. Find the mass % of As4S4(s) in the original mixture.

21. ## Math Gr 12

A model rocket is shot straight into the air. Its height in meters a "t" seconds is given by h=-4.9^2+29.4t. a) What is the rocket's initial height? c)When does the rocket reach the ground?

22. ## History

1.) why did most slave owners not want slaves to be educated? wouldn't it be they feared education would lead to revolts ?

23. ## English

Identify the italicized part of the sentence. All of the operators are efficient. subject predicate direct object indirect object predicate noun predicate adjective the italicized word is efficient.

24. ## E.L.A. PLEASE CHECK!

Which choice best describes the underlined words in this sentence? Should you have been walking the dog without a leash? Underlined is: Should _____ have been walking it does not include the word "you" so I just did an under score to represent that. A-

25. ## college chemistry

a 1.0kg sample of metal with a specific heat of 0.50KJ/Kg C is heated to 100.0C and then placed in a 50.0g sample of water at 20.0C . What is the final temperature of the metal and the water?

26. ## Physics

A car accelerates from rest at 5 m/s2 for 5 seconds. It moves with a constant velocity for some time, and then decelerates at 5 m/s2 to come to rest. The entire journey takes 25 seconds. On a separate sheet of paper, plot the velocity-time graph of the

27. ## Math z-scores

find the z-scores for which 92% of the distribution's area lies between -z and z

28. ## Trigonometry

A volleyball player spikes the ball from a height of 2.44 meters. Assume that the path of the ball is a straight line. To the nearest degree, what is the maximum angle, θ, at which the ball can be hit and land within the court?

29. ## Trigonometry

A painter wants to lean a 30-foot ladder against a wall. Safety guidelines recommend that the distance between the base of the ladder and the wall should be 1/4 of the length of the ladder. To the nearest degree, what acute angle should the ladder make

30. ## mathematic

The local skateboard company reports that when they produce and sell n skateboards in a week, the cost is represented by the modelc=850+76n . The revenue is represented by the model r=150n. If both C and R are in dollars, write an equation for the profit

31. ## Chem Help!

Which pair of reagents will take part in a redox reaction? A CH3CH2OH + concentrated H2SO4 B CH3CHO + Tollens’ reagent C CH3CO2C2H5 + dilute H2SO4 D CH3COCH3 + Fehling’s solution Ans: B Someone please explain! Thanks! :)

32. ## Physics help please

Rutherford Scattering Calculate the impact parameter for scattering a 7.7 MeV alpha particle from gold at an angle of (a) 1 degree and (b) 90 degrees?

33. ## Algebra

the outside of a picture frame has a length which is 4 cm more than width. The area enclosed by the outside of the picture frame is 165 square cm. Find the width of the outside of the picture frame.

34. ## CHEM HELP!

A car burning lead-free fuel has a catalytic converter fitted to its exhaust. On analysis its exhaust gases are shown to contain small quantities of nitrogen oxides. Which modifications would result in lower exhaust concentrations of nitrogen oxides? 1 an

35. ## math

Most Americans throw away about 1365 pounds of trash each year. Is it reasonable to estimate that Americans throw away over 10000 pounds of trash in 5 years? Explain.

36. ## math...

Add the fractions and write your answer in lowest terms. 2/5+1/9 A. 1/15 B. 23/45 C. 3/14 D.19/45 B? Thanks

37. ## MATH HELP PLEASE

1. What is the product of (5.1 × 10^3) • (3.2 × 10^3)? (1 point) 16.32 × 10^6 1.632 × 10^7 16.32 × 10^9 1.632 × 10^10 2. What is the product of (7.28 × 10^-2) • (9.1 × 10^-2)? (1 point) 6.6248 × 10^-3 66.248 × 10^-4 6.6248 × 10^4 66.248 ×

38. ## chemistry

A solution contains an unknown amount of dissolved magnesium. Addition of 5.34×10−2mol of Na2CO3 causes complete precipitation of all of the magnesium. What mass of magnesium was dissolved in the solution.

39. ## English

Javier, Hey, bud. It's great to hear from you and even better to find you you're doing well. We just got off vacation in the islands, and it was awesome. I'm sunburned, tired, and a little sorry that it's over. You didn't mention what you did this summer.

40. ## LA - The Story Teller

"The Story-Teller" by Saki The children frequently interrupt the aunt's story to ask petulant questions. Given the this context, what is the meaning of the word petulant? rude and impatient*** calm and quiet interested and intelligent tired and

41. ## physics

One ball is dropped from a cliff. A second ball is thrown down 1.00 s later with an initial speed of 40.0 ft/s. How long after the second ball is thrown will the second ball overtake the first?

42. ## English

Javier, Hey, bud. It's great to hear from you and even better to find you you're doing well. We just got off vacation in the islands, and it was awesome. I'm sunburned, tired, and a little sorry that it's over. You didn't mention what you did this summer.

43. ## English

If a letter is brief, be sure to explain why. True False

44. ## Fiancne

Stephenson Real Estate Company was founded 25 years ago by the current CEO, Robert Stephenson. The company purchases real estate, including land and buildings, and rents the property to tenants. The company has shown a profit every year for the past 18

45. ## 7th grade math

Can you check this problem? Jean has 5 different colors of markers: red, blue, green, orange, and purple. Two colors are used to make a sign. How many different combinations are possible? List them. Ans: 10 possible combinations red/blue, red/green,

46. ## Geometry

Believe it or not this is a geometry question... What is the hypothesis of the given statement? If money grows in trees, then you can be rich. Money grows in trees.(my answer???) You cannot be rich. Money does not grow in trees. You can be rich.

47. ## Physics

I need help setting up this problem. While standing on the roof of a building, a child tosses a tennis ball with an initial speed of 15 m/s at an angle of 20° below the horizontal. The ball lands on the ground 2.8 s later. How tall is the building? Thank

48. ## English

I read Shakespeare's sonnet 29, and I must write a 5 paragraph essay on the theme. I need a few guidance tips and ideas on what to write. Thanks in advance! So, There are multiple themes in this poem but I chose the theme(my main discussion) 'wealth',and I

49. ## world civ.

The standard of living for Anglo-Americans is: low medium average high

50. ## physics

A soccer ball is kicked at an angle of 30° to the horizontal with an initial velocity of 16 m/s. How far does the soccer ball go? A. 3.8 m B. 6.6 m C. 13.3 m D. 22.6 m i used the formula vf^2-(visin theta)^2 / 2g for this and solved it for 3.3m but none

51. ## Physics Repost

I need help setting up this problem. While standing on the roof of a building, a child tosses a tennis ball with an initial speed of 15 m/s at an angle of 20° below the horizontal. The ball lands on the ground 2.8 s later. How tall is the building? Thank

52. ## Physics

I need help setting up this problem. A tennis player serves a tennis ball such that it is moving horizontally when it leaves the racquet. When the ball travels a horizontal distance of 19 m, it has dropped 58 cm from its original height when it left the

53. ## Math

A woman has a total of \$10,000 to invest. She invests part of the money in an account that pays 6% per year and the rest in an account that pays 9% per year. If the interest earned in the first year is \$750, how much did she invest in each account?

54. ## chemistry

Naturally occurring silicon exists as 3 isotopes: 28Si, 29Si, and 30Si, whose atomic masses are 27.9769, 28.9865, and 29.9838, respectively. The most abundant isotope is 28Si, which accounts for 92.23% of naturally occurring silicon. Given that the average

55. ## world civ.

The Murray _____ is in eastern Australia. Plateau Plain Mesa River

56. ## Chemistry

Chemistry question: Given: CH4 + 2O2 ~ CO2 + 2H2O C - H = 99 kcal O - O = 119 kcal C = O = 192 kcal O - H = 111 kcal Calculate the change in energy for the CH4 - O2 system.

57. ## stats and prob

Consider a sequence of independent Bernoulli trials with p= 0.2 a) what is the expected number of trials to obtain the first success? for this I thought of it as geometric so 5 trials b) after the eighth success occurs, what is the expected number of

58. ## Physics Repost

I need help setting up this problem. A tennis player serves a tennis ball such that it is moving horizontally when it leaves the racquet. When the ball travels a horizontal distance of 19 m, it has dropped 58 cm from its original height when it left the

59. ## statistics

n order to estimate the difference between the average Miles per Gallon of two different models of cars , samples are taken and the following information is collected. Model A Model B Sample Size 13 14 Sample Mean 35 32 Sample Variance 13 7 a) Find a 95%

60. ## Math

2. What is the selling price of a \$12,543 boat if a \$758 discount is given? A. \$11,758 B. \$12,785 C. \$11,785 D. \$12,758 I think it is C.

61. ## Physics

I need help setting up this problem. While standing on the roof of a building, a child tosses a tennis ball with an initial speed of 15 m/s at an angle of 20° below the horizontal. The ball lands on the ground 2.8 s later. How tall is the building? Thank

62. ## Math

Convert 2yd, 2ft, 5in. to centimeters. Convert 10yd,1ft, 7in. to meters. I tried it twice but still didn't get it right. Please help me out.

63. ## Communication

Question 1. 1. Which of the following guidelines are most correct regarding rules for responding to self-disclosure? (C) Respond back immediately, support the person disclosing, and listen critically. Listen critically, never use the disclosure against the

64. ## WORLD CIV. QUICK QUESTION

At which latitude is Antarctica? 0 degrees lowest degrees highest degrees

65. ## Physics

I need help setting up this problem. A tennis player serves a tennis ball such that it is moving horizontally when it leaves the racquet. When the ball travels a horizontal distance of 19 m, it has dropped 58 cm from its original height when it left the

66. ## English

A business letter does not serve as a record of a transaction. True False

67. ## geometry

If a 5 by 7 picture is enlarged by 150%, what is the new area?

68. ## Physics

Kangaroos can easily jump as far as 8.0 m. If a kangaroo makes five such jumps westward and then seven such jumps northward, what angle would the resultant displacement vector make with the northern displacement vector? What is the magnitude of the total

69. ## biology

_______ is the tendency for the fluids to resist flow.______________ water is more vicious than warmer water, allowing floating organisms to use less energy to keep from sinking.

70. ## Math

Find the LCD of 3/5 and 1/6. A. 5 B. 6 C. 11 D. 30 I choose D am I right? Thanks

71. ## History

explain how washington warms habitual hatred or fondness for other countries?

72. ## Social Studies

Toward what audience did Martin Luther King Jr. direct his “I Have a Dream” speech? How is this clear from the speech’s language?

73. ## Chemistry

An aqueous stock solution is 85.0% H2SO4 by mass and its density is 1.83 g/mL. What volume of this solution is required to make 1.00 L of 1.35 mol/L H2SO4(aq)? Give your answer in millilitres, accurate to three significant figures.

74. ## Economics

An engineer has received two bids for an elevator to be installed in a new building. Given a 10% interest rate, which bid should be accepted? Alternatives Westinghome Itis Installed cost \$45,000 \$54,000 Annual cost 2700 2850 Salvage value 3000 4500 Life,

75. ## Statistics

Foofy obtained a significant Fobt from an experiment with five levels. She therefore concludes that changing every condition of the independent variable results in a significant change in the dependent variable. (a) Is she correct? Why or why not? (b) What

76. ## algebra 2

Multiply polynomials (ab-2)(ab+2)

77. ## Chemistry

How many grams of solid silver nitrate would you need to prepare 240.0mL of a 0.160M AgNO3 solution?

78. ## Math .

3(4x - 2) = 2(6x - 3) one solution infinite solutions ** no solution a+5 = 1/5(5a + 25) one solution infinite solutions no solution ** 3(4x - 3) - 7x = 5x - 9 one solution infinite solutions no solution 8+2(8x - 6) (choose all that apply) 2(4x + 7) 9x –

79. ## math

Kevin is a quarterback on the football team. He completed 36 passes during the season. His second-string replacement mark completed 2/9 as many passes as kevin. how many passes did Mark complete?

80. ## Physics

A ball is thrown vertically upward with an initial speed of 11 m/s . Then, 0.67 s later, a stone is thrown straight up (from the same initial height as the ball) with an initial speed of 25 m/s . How far above the release point will the ball and stone pass

81. ## Math

4(2x + 3) = 2(3x - 4) one solution infinite solutions * my answer* no solution 6 - a = 1/3(9a - 18) one solution * my answer* infinite solutions no solution 3(4x - 3) - 7x = 5x - 9 one solution infinite solutions *my answer* no solution 4(2x - 3) - 4x

82. ## economic engineering

By installing some elaborate inspection equipment on its assembly line, the Robot Corp. can avoid hir- ing an extra worker who would have earned \$36,000 a year in wages and an additional \$9500 a year in employee beneﬁts. The inspection equipment has a

83. ## Math (LCM)

A music store gives every 20th customer a \$5 gift card. every 50th customer gets a \$10 gift card. Which customer will be the first to receive both types of gift cards? Use prime factorizations.

84. ## 4-- math questions

1. Simplify this expression: 6d + 11 – 3d + 4. 3d 17d + 7d 3d + 15 9d + 15 2. Name the coefficients in this expression: 7a + 3b + 9. 7 and 3 7, 3, and 9 7a and 3b 7a, 3b, and 9 3. Name the like terms in this expression: 4c + 12 + 3c + 2b. 4c, 3c, and 2b

85. ## math

A room measures 14 feet by 20. feet. How many tiles would it take to cover the deck if the square tiles measure 8.0 inches to the side?

86. ## chem

What is the mass in grams in Br in 7.20 moles of FeBr2?7.20 mol FeBr2x215.65=1552.68=1553 g/m

87. ## THEORY OF INTEREST

Suppose that a money market fund pays a nominal rate of interest of 8.7 percent convertible monthly. What is the equivalent nominal rate convertible quarterly?

88. ## Physics

In an experiment done by scattering 5.5 MeV α particles on a thin gold foil, students find that 10,000 α particles are scattered at an angle greater than 90 degrees. How many α particles will be scattered between 60 degrees and 80 degrees?

89. ## Math

Every item in the Just a Dollar store is priced at \$1.00. When Mary Jo opens the store, there is \$127.00 in the cash register. When she counts the money in the cash register at the end of the day, the total is \$1,055.80. If the sales tax rate is 8%, how

90. ## Algebra 1

Can someone please check my answers? Thanks! :) 1.) Which of the following inequalities is true for all real values of x? a.) x^2≤x^3 b.) 2x^3≤4x^2 c.) 4x^2≤94x)^2 d.) 4(x-3)^2≥4x^2-3 My answer: B. 2.) Which of the following inequalities is true

91. ## real analysis

Hello. I want make sure im doing right step. Prove the supremum of the set A={2-1/n: n in natural number} is 3. My answer Proof: lets prove supA=2 Then 2 is an upper bound of A. Let S'

92. ## History

After the First Seminole War, the Seminole tribe was __________. A.forced to move south to avoid settlement and the US government B.given old lands to the north to encourage assimilation C.forced to leave its lands and be removed to the West D.given lands

93. ## math

mary put new tiles on her kitchen floor. the floor measures 6 feet long by 5 feet wide. she used 10 tiles to cover the entire floor. each tile was 3 feet long. write an equation using the variable x to model this situation. what does x represent in the

94. ## physics

a Baseball player throws a ball for the outfield horizontally such that it is released 1.5 meters above the ground. if the ball is to reach second base 20.0 meters away, how fast must the ball be thrown so that is does not bounce before reaching the base

95. ## Math

Travis has a total of \$6,000 invested in two accounts. The total amount of interest he earns from the accounts in the first year is \$420. If one account pays 6% per year and the other pays 9% per year, how much did he invest in each account?

96. ## Economics

Given the following data, use present worth analysis to ﬁnd the best alternative, A,B, or C. A B C Initial cost \$10,000 15,000 \$12,000 Annual beneﬁt 6,000 10,000 5,000 Salvage value 1,000 −2,000 3,000 Useful life 2 years 3 years 4 years Use an

97. ## chemistry 101

Give the name of the product from complete hydrogenation of 2-ethyl-1-hexene

98. ## physics

In the Bohr model of the hydrogen atom, an electon mass= 9.11 x 10^-31 kg orbits a proton at a radius of 5.29 x 10^-11 m. The proton pulls on the electron with a force of 8.20 x 10^-8N. what is the speed of the electron? what is the period of the electron?

99. ## government

main idea for article 1 of the confederation what pictures can i put? and what are some essential questions?

100. ## precal

what is the 7th geometric sequence when a10 is 9 and a13 is -72

101. ## Math

Bianca is making scarves to sell has 33 pieces of of blue fabric 37 pieces of green fabric and 41 pices of red fabric suppose Bianca uses 3 pieces of fabric to make 1 scarf how many scarves can she make?

102. ## Chemistry

Accurately weigh 0.9-1.1 g into a 200 mL beaker. Dissolve the KIO3 in a small amount of distilled water. Quantitatively transfer, with rinsing, to a 500 mL volumetric flask. Dilute to the calibration mark and shake well. Rinse the buret several times with

asked by Jessica Horen
103. ## engineering ecnonmics

By installing some elaborate inspection equipment on its assembly line, the Robot Corp. can avoid hir- ing an extra worker who would have earned \$36,000 a year in wages and an additional \$9500 a year in employee beneﬁts. The inspection equipment has a

104. ## Pre-Cal

The total cost (in thousands of dollars) of a machine manufacturing unit is given by the function T(x) = 300 + 5x, where x is the number of machines produced. What is the average cost (in thousands of dollars) of manufacturing 200 machines? (Average cost

105. ## physics

The helicopter in the drawing is moving horizontally to the right at a constant velocity. The weight of the helicopter is W=41600 N. The lift force L generated by the rotating blade makes an angle of 21.0° with respect to the vertical. (a) What is the

106. ## English

Typed or printed letters should always contain _____. a formal salutation a handwritten signature contractions block paragraphs

107. ## Chemistry 30

A mixture of 2.5 moles of H2O and 100 g of C are placed in a 50.0 L container and allowed to come to equilibrium in the following reaction: C(s) + H2O(g)  CO(g) + H2(g) The equilibrium concentration of hydrogen gas is found to be 0.040 M. What is the

108. ## History

The new, industrial middle class was: A. actually not new at all, but was a propaganda term created by Napoleon III. B. the term used to describe the European proletariat after 1810. C. composed of people who were often the children of industrial workers

109. ## math

the ratio of the number of people who own a smartphone than a flip phone, how many people own each type of phone?

110. ## Physics

A velodrome is built for use in the Olympics (see the figure below). The radius of curvature of the surface is 15.9 m. At what angel should the surface be banked for cyclists moving at 15.0 m/s? Choose an angle so that no frictional force is needed to keep

111. ## Calculus

Hi. I need help with finding the derivative of the function: y= [(sec^7 x)/7] - [(sec^5 x)/5] Thanks!

112. ## Math

Suppose an experiment involves rolling a fair die 720 times. Find the mean of the number of times a number less than 2 is rolled

113. ## E.L.A. PLEASE CHECK!

Question 1. 1. Write S or R to identify each item as a sentence or a run-on sentence. My camera is old I'll be glad to get a new one. Question 2. 2. Write S or R to identify each item as a sentence or a run-on sentence. Flamingos are usually pink one

114. ## Physics

Which of the following are the correct units for mass?

115. ## Math (What Do I Do)

Choose the best graph for the given situation. Copy the graph and label the axes with the variables give in parenthesis (the first variable goes on the y axis and the second variable on the x axis). 1.Karina walked from home to the library, did some

116. ## Chemistry

HELP PLEASE. I have no idea how to set this up. I tried using the q=mc(change in temp) equation but its not working out. A 59.8 g block of an unknown metal at 87.5 degrees Celsius was dropped into an insulated vesssel containing approximately 33 g of ice

117. ## E.L.A. PLEASE CHECK!

Which choice best describes the underlined words in this sentence? On the next cloudless night, go outdoors and look at the sky. Underlined is: go ______ look A- simple predicate B- complete predicate C- compound verb D- none of the above I think it is C.

118. ## Precalculus

Find all rational zeros of the polynomial. (Enter your answers as a comma-separated list.) P(x) = x3 + 6x2 − 15x − 100

119. ## chemistry

Household bleach contains (NaClO)2 that decomposes in water, NaClO + h2o = Na+ + OH- + Cl2 + O2 If 15ml bleach containing 5.85℅ NaClO is allowed to decomposes completely, then hoe many mL of o2 at 22C and 755mmHg can be liberated. Density of bleach=

120. ## Math

1.) What is the inverse of the relation (3, -1), (2. 5), (-4, -4)? 2.) What is the inverse of the relation (1, -3), (3, 5), (6, -2)?

121. ## Math

A resultant vector has a magnitude of 25m?s with an angle of 20 degrees counterclockwise of east. draw the resultant on a coordinate plane, Find the x-component. Find the y-component

122. ## Math

Subtract the fractions and write your answer in lowest terms. 4/5-3/8 A. 1/40 B. 1 7/4 C. 7/10 D. 17/40

123. ## math

1. Finding the Counterfeit Coin. You have 5 coins. You know that one of them is counterfeit and weighs less than the others. Suppose also that you have a balance scale. Is there a strategy for finding the counterfeit coin using the balance scale only

124. ## Fluid Mechanics

Oil (sp. gr.= 0.8) flows smoothly through the circular reducing section shown at 3 ft^3/s. If the entering and leaving velocity profiles are uniform, estimate the force which must be applied to the reducer to hold it in place. When Fluid is entering the

125. ## Math Help

Which pair(s) of functions are inverses? There may be more than one correct answer. a.) f(x) = x - 12, g(x) = x + 12 b.) f(x) = 3x, g(x) = 1/3x c.) f(x) = 4x, g(x) = -4x d.) f(x) = 2x + 1, g(x) = 2x - 1 My answer: B & C

126. ## E.L.A. PLEASE CHECK!

Which choice best describes the underlined words in this sentence? Red and a strange shade of green were the only colors available. Underlined is: Red _____ shade A- simple subject B- complete subject C- compound subject D- none of the above I think it is

127. ## Physics help please

In an experiment done by scattering 5.5 MeV α particleson a thin gold foil, students find that 10,000 α particles arescattered at an angle greater than 90 degrees. How many α particles will be scattered between 60 degreesand 80 degrees?

128. ## physics

A 20kg box rests ona table and a 10kg is placed on top of the 20kg box. Determine the normal force that the table exerts on the 20kg box and the normal force that the 20kg box exerts on the 10kg box. please help

asked by fresno T
129. ## Chem

Cyanohydrins can be made from carbonyl compounds by generating CN- ions from HCN in the presence of a weak base. In a similar reaction, -CH2CO2CH3 ions are generated from CH3CO2CH3 by strong bases. Which compound can be made from an Aldehyde and CH3CO2CH3?

130. ## Algebra

Write the solution set of the inequality |x + 2| < 5 in the interval notation.

131. ## Trigonometry

Solve for θ in the equation cos θ = -0.181 when 180º < θ < 360º. Round your answer to the nearest tenth of a degree.

132. ## College Prep Math 4

The formula is S=2 times the square root of 5 times L. S equals the estimated speed of a car and L equals the length of the skid marks prior to the accident. 100=2(square root of 5x) I have no idea how to solve this

133. ## Stat

α=0.05 for a two-tailed test. Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value used to test a null hypothesis. Is the correct answer +/- 1.96?

134. ## Physics-Intro

Find the total force necessary to give a rocket of mass 25,000 slugs an acceleration of 28.0 ft/s2.

135. ## Physics

Human feet and legs store elastic energy when walking or running. They are not nearly as efficient at doing so as kangaroo legs, but the effect is significant nonetheless. If not for the storage of elastic energy, a 70.0-kg man running at 4.00 m/s would

136. ## math

83 3rd graders 115 4th graders 150th graders all the 5th graders will be on one side and all the 4th graders will be on the other side the 3rd graders will be split up so that the two sides will have equal number of student how many 4th graders ?how many

137. ## 8th grade Math

At 2pm the temperature is 22 degrees, by 4am it is negative 7 degrees. We think the answer in the change of temperature is 22 degrees am I right?

138. ## Trigonometry

Solve sin θ = 0.95 for -90º ≤ θ ≤ 90º.

139. ## E.L.A. PLEASE CHECK!

Write S or F to identify each group of words as a sentence or a sentence fragment. Wish on that star. I think it is a sentence fragment (f)

140. ## Chemistry

How many grams of HCl are produced if the following reaction yielded 27.1 grams of H3PO4? PCl5 + 4 H2O --> H3PO4 + 5 HCl

141. ## physics

A rocket blasts off from rest and attains a speed of 59.4 m/s in 14.1 s. An astronaut has a mass of 66.7 kg. What is the astronaut's apparent weight during takeoff?

142. ## CHECK PLEASE

Find the best word to complete the sentence. 1. specter 2. specimens 3. reiterate 4. refuted 5. vigilant 1. Find the best word to complete the sentence. In Charles Dickens's A Christmas Carol, the ___ of Jacob Marley returns from the grave to haunt his

143. ## physics

An electron travels 2.7 m in 6.37 × 10−8 s. How fast is it traveling?

144. ## Algebra2

Graph the compound inquality on the number line. x< 3 or x > 6

145. ## Pre-Calculus/Trigonometry

Express the following function, F(x) as a composition of two functions and f and g. f(x)= x^2/(x^2+4)

146. ## Statistics

Suppose an urn contains 10 balls numbered from 1 to 10. Someone draws 3 balls simultaneously from the urn (i.e. without replacement.) What is the probability that the lowest number drawn is 2? (8C3)/(10C3) but I know that is wrong. I also tried

147. ## physics

A body travels with uniform acceleration.Its final velocity,v=180-7x,where x is the displacement.Then find its acceleration.

asked by go ramesh
148. ## Physics

A Boeing 747 can travel up to 254m/s. The pilot must travel from Vancouver to Calgary, which is located 3.0 x 10^2 km [N] and 7.0 x 10^2 km [E]. There is a strong wind blowing at 50.0 m/s [SE] A) determine the direction that the plane must travel to reach

149. ## chem

structural formula for 2-ethyl-1-hexene

150. ## chemistry

Calculate the air concentration (mol/l) of phenol in equilibrium with solution including 100 g/m3 of phenol.(T=25 C)

151. ## Physics

At a time when mining asteroids has become feasible, astronauts have connected a line between their 3360-kg space tug and a 6300-kg asteroid. Using their ship's engine, they pull on the asteroid with a force of 490 N. Initially the tug and the asteroid are

152. ## physics

A block of mass m=8 kg is held at the rest on a smooth (fiction less) 37 degree incline by a horizontal force F. the magnitude of the force F (in N) is:

153. ## Math

Determine if the conditional statement is true. If a shape is a square, then it will have four sides. True?

Add the two component vectors from Sample Problem 1 algebraically to erify that they equal the given vector The two component vectors are: 8.6m(North) and 12m (west) The given vector is 15m(West 35 degrees North)

156. ## Physics (Force)

A power wheelbarrow has a mass of 432 kg. What force must be applied to give it an acceleration of 1.75 m/s2?

157. ## biology

Julie took her lunch to work every day. She wanted to know what type of insulation would keep her lunch the coolest. Each day, she took her lunch in a different container: a Styrofoam cooler box, a plastic cooler box and a soft insulated lunch bag. She

158. ## Physics

a boat crosses a .2mi river is heading perpendicularly relative to the shore. its speed in still water is 4mph and the speed of the current is 6mph

159. ## Pre-Calculus/Trigonometry

For the sequence an = 4n + 5: find: the first five terms: find the sum of the first 25 terms: is it a arithmetic sequence? If so how can you tell, if not, why not?

160. ## physics

A cannon is fired horizontally from a platform . The platform rests on a flat, icy, frictionless surface. Just after the shell is fired and while it is moving through the barrel of the gun, the shell (mass 3.2 kg) has an acceleration of 12500 m/s2. At the

161. ## physics

Find the total force necessary to give a rocket of mass 25,000 slugs an acceleration of 28.0 ft/s2.

162. ## 2math

n January, a company named ACME had 100 employees. In February they lost 15 employees, and in March the company hired 25 new employees. How many employees were working for ACME at the beginning of April? 100 105 110 115

163. ## math 3

A customer sent in a \$230 check to pay off an overdue bill but failed to pay the interest that accrued over the 45 days after the posted due date. The original balance owed was \$230, and the account accrues interest at \$0.42 per day. What amount of money

164. ## math 4

yson talked with 150 customers on his shift yesterday. Of those, 20% resulted in a successful upsell of additional purchases. If Tyson makes a \$6 commission on top of his regular salary for each successful upsell that he makes, how much commission did he

165. ## physics

A mass pulled by a constant force accelerates from 10 cm/s to 40 cm/s in 5.5 s. A second force accelerates the same mass from rest to 105 cm/s in 15.0 s. If the first force is known to be 5.0 N, that what is the magnitude of the second force?

166. ## math

P is the product ,n is the consecutive term of geometric progression, s is tje sum of their reciprocal then(S/R)n is equal a) p b) p2 c) p3 d) pn

asked by mayuri shelke
167. ## History

Prussia’s victory over Austria in 1866 allowed the Italians to take over __________ and the withdrawal of French troops during the Franco-Prussian War of 1870 allowed the Italians to take over __________. A. Naples; Florence B. Venetia; Rome C. Rome;

168. ## Math Questions

1.) What is the inverse of the relation (3, -1), (2. 5), (-4, -4)? 2.) What is the inverse of the relation (1, -3), (3, 5), (6, -2)?

169. ## Calculus

Hi! I need help finding the derivative of this function. f(x)= ln [(x(x-1))/(x-2)] Thank you.

170. ## trigonometry

How do you factor 24x squared -18x

171. ## Physics College

What is the rate of deceleration of a 1400-kg SUV that is going 75.0 km/h and then slows to 25.0 km/h in 8.20 s?

172. ## Physics help

Add the two component vectors from Sample Problem 1 algebraically to erify that they equal the given vector The two component vectors are: 8.6m(North) and 12m (west) The given vector is 15m(West 35 degrees North)

173. ## Algebra 1

Can someone please check my answers? Thanks! :) 1.) Which of the following inequalities is true for all real values of x? a.) x^2≤x^3 b.) 2x^3≤4x^2 c.) 4x^2≤94x)^2 d.) 4(x-3)^2≥4x^2-3 My answer: B. 2.) Which of the following inequalities is true

174. ## Physics

HI I'm just looking for an answer for 3 questions as my textbook does not explain the answer. How a tin can loses heat through: 1) Conduction 2) Convection 3) Radiation

175. ## Physics

Add the two component vectors from Sample Problem 1 algebraically to erify that they equal the given vector The two component vectors are: 8.6m(North) and 12m (west) The given vector is 15m(West 35 degrees North) Because when i add 8.6 and 12 it doesnt

176. ## Science

Vocabulary Write a brief paragraph using the terms sedimentary rock,metamorphic rock,and rock cycle.

Add the two component vectors from Sample Problem 1 algebraically to erify that they equal the given vector The two component vectors are: 8.6m(North) and 12m (west) The given vector is 15m(West 35 degrees North)

178. ## 4th grade math

Danielle received \$32 for her birthday. Three years ago, she received 1/4 as much. How much did Danielle receive three years ago?

179. ## solution making/ chemistry/biotech

how much of a .2M solution can you make with 340 g of calcium carbonate ( MW=100.0869) Do I multiply 340g by 1mole/MW

180. ## Math

I forgot how to do inequalities with a rational function. The question I have is: ((3x-2)/(x-1))

181. ## English

Fortunately I was able to fight off my ? Even though his attack to me by surprise. Assailant

182. ## Trigonometry

Evaluate the inverse trigonometric function. Give your answer to the nearest degree. (Enter only the number.) cos^-1 (-1)

183. ## Pre-caluclus

I do not know how to solve for y to get the inverse of this question: The number of elephants in a park is estimated to be P(t)=7500 1 + 749e^(−0.15t) where t is the time in years and t = 0 corresponds to the year 1903. Find the inverse of P(t). What is

184. ## Algebra 2 Answer Check

Write an equation in slope-intercept form for the line. 1. Perpendicular to 5x + 2y = 8 and through (5,3). A: y = -1/5x + 4?

185. ## Math

I wanted to double check that I am correct on the work area and answers please. 1.Given f(x)=x+2 and g(x)= 3x-4. Find (f+g). Work: (x+2) + (3x-4) Answer: 4x-2 2.Given f(x)=x+2 and g(x)=3x-4. Find (f*g). Work: (x+2)(3x-4) Answer: 3x² +2x-8 3.Given f(x)=x+2

186. ## 7th grade math

find the sum 7/20 + (-4.8) + (-4/5) +4.9 im cluless

187. ## Math

Is -2 an even number?

188. ## Math

A woman owns a small, cash-only business in a state that requires her to charge 6% sales tax on each item she sells. At the beginning of the day, she has \$290 in the cash register. At the end of the day, she has \$1200 in the register. How much money should

189. ## chemistry

50g of watermelts at 0 degrees .what is the change in entropy of the water

190. ## physics

A woman raises a 65N box 16m in 4 seconds.Calculate the work done by the woman on the box

191. ## Pre-Calc

Can someone check this? Thanks! :) Which pair(s) of functions are inverses? There may be more than one correct answer. a.) f(x) = x - 12, g(x) = x + 12 b.) f(x) = 3x, g(x) = 1/3x c.) f(x) = 4x, g(x) = -4x d.) f(x) = 2x + 1, g(x) = 2x - 1 My answer: A & C

192. ## Threading a machine

How do you thread a sewing machine?

193. ## English/research

I want to find about the famous pharmaceutical companies in Chicago. Would mind telling me which website I can find.

194. ## Pre-caluclus

The question is: ln(x-2e)+ln(x-3e)=2 I know about ln(xy)= ln(x)+ln(y), and I tried it but I can't simplify it without using decimals and I can't use decimals.

195. ## English

In the sentence The corn palace is a famous building in Mitchell, a prairie town that welcomes cornhusker a. Is prairie town a compound noun?

196. ## History

identify and explain the foreign policy for America proposed by Washington in this address

197. ## Chemistry

If you are given a photoelctronic spectrum with just the peaks, how do you identify the element that would produce it?

198. ## science

What is the speed in meters per second of a boat traveling at a speed of 16.1 knots?

199. ## Math

4(2x + 3) = 2(3x - 4) one solution *my answer* infinite solutions no solution

200. ## Science quick question

bacterial structures which could survive unfavorable conditions are called? Spores Flagella Cysts Granuless My answer: spores?

201. ## 8th grade math

At 2pm the temperature is 22 degrees, by 4am it is negative 7 degrees. We think the answer in the change of temperature is 29 degrees am I right?

202. ## physics

calculate at what height above the earths surface a satellite must be placed if it is to remain over the same geographical point on the equator of the earth. what is the velocity of the satellite?

203. ## Algebra ll

Rational expression pxplain your work please . 37/k^2-k-30 and x^2-25/2

204. ## math

a man has 35 models. he has 4 times as many airplane models as he does helicopter models. how many airplane models does he have?

205. ## math

how much fuel will all of your familys vehicles hold if they are completely full Explain

206. ## Pre-Calculus/Trigonometry

Solve the following system of equations algebraically. Verify the solution by using matrices. 8x-2y=5 -12x+3y=7

207. ## Physics

Q. Defined escape velocity obtain an expression for the escape velocity of a body from the surface of the earth?

asked by Nazmul Hoque
208. ## English

Wade's nephew John came to the house. Wade's nephew, John, came to the house. Which is correct?

209. ## English

What does it mean to take a pride in something you have?

210. ## Math

I wanted to double check my work. I am trying to find the domain: 1. f(x)= x+5 Answer: No Domain 2. f(x) = 1 X+5 Work: x+5≠0 X=-5 Answer: (-∞,-5) ᴜ (-5,∞) 3. f(x)= √x+2 Work: x+2 ≥ 0 x ≥ -2 Answer: [-2,∞)

211. ## English - grammar

How to decide how to end a sentence with he/him or she/her? Ex. We can not eat before he? or him?

212. ## Math

The third angle in an isosceles triangle is 116° more than twice as large as each of the two base angles. Find the measure of each angle.

213. ## Algebra 1

Can someone please check my answers? Thanks! :) 1.) Which of the following inequalities is true for all real values of x? a.) x^2≤x^3 b.) 2x^3≤4x^2 c.) 4x^2≤94x)^2 d.) 4(x-3)^2≥4x^2-3 My answer: B. 2.) Which of the following inequalities is true

214. ## Math Gr.12

h=-4.9t^2+29.4t what is the rocket's maximum height? (think vertex)

215. ## math

what are the missing numbers between 21 and 63

216. ## stats

A study shows that 6% of household appliances fail during any given year. If a person has 6 household appliances, what is the probability that exactly 2 of them will fail next year? (x) npq = P(.6+.94)=1 6*2=12

217. ## Philosphy

DuBois claims that this occurs when the stronger members in society do not protect the weaker members:

218. ## English

Can you have a prepositional phrase inside a prepositional phrase? Ex It remains extremely popular, (owing to its wooded paths, baseball diamonds, green lawns, and, (of course). the animals) in its famous zoo.

219. ## Math

This is a bonus question. If the modes of a problem are13 and15 and the mean and the median are 15 how do you come up with the other numbers

220. ## Math

The question is: f(x)=(1+2x)/(1+x), find the inverse and state the domain I have made it up to y=(1+2x)/(1+x) x=(1+2y)/(1+y)

221. ## Pre-Calculus/Trigonometry

For f(x)= 1/(x-5) and g(x)= x^2+2, find: a. (f o g)(x) b. (g o f)(6)

222. ## Math Pre-Calc/Trig

If 11 square meters of tile are available to make a rectangle whose width must be 6 meters less than its length, what would be the dimensions of the rectangle?

223. ## Math

What is 145 over 16 in simplest form? 29/2 * 5/8 = 145/16 = ?? PLEASE HELP MMEEEE DX

224. ## Curious

How did ebola get to the USA

225. ## math exponential function

if 450,ooo is invested at 12% compounded semiannually .When will the amount of investment be 477,000?

226. ## math- pre calc/trig

Find the length of each side of a square if the diagonal is 7(square root 2)? How do I solve or set up this problem?

227. ## History

All of the following are correct about nineteenth century Liberalism EXCEPT: A. having economic and political components. B. supporting the idea of civil rights. C. wanting to limit governmental power. D. opposing limiting governmental power. Ans: C

228. ## Math

How to plot (0,-2)

230. ## math

(3r-5)(x+3)

asked by steve wiliams
231. ## Math

4(2x - 3) - 4x (answer all that apply) 4x – 12 *my answer* 3x – 4 *my answer* 3(2x – 6) 4(x – 5)

232. ## Good Neighbor Day

What are some ways you can be a good neighbor?

233. ## Pre-Calculus/Trigonometry

for f(x)= 1/(x^2-3), find: a. f(3) b.f(2+h)

234. ## 2 math

Denise spoke with a total of 80 customers on her shift at work today. Of those customers, 55% resulted in a sale, 15% said they would "come back another time", and 10% were sent to speak with the supervisor on shift. What is the total number of customer