sandy

Most popular questions and responses by sandy
1. chemistry

Consider the reaction, C2H4 (g) + H2 (g)- C2H6 (g) where -137kJ of heat is released. How many kilojoules are released when 55.3g of C2H4 reacts?

asked on July 10, 2011
2. Check math please!

Anna mixes the letters S, E, L, E, C, T, E, and D thoroughly. Without looking, Mary draws one letter. Expressed as a fraction, decimal, and percentage, what is the probability that E will NOT be the letter Mary selects? A. 3/8, 0.375, 37.5% B. 8/5, 1.6,

asked on February 25, 2016
3. Check math please!

Anna mixes the letters S, E, L, E, C, T, E, and D thoroughly. Without looking, Mary draws one letter. Expressed as a fraction, decimal, and percentage, what is the probability that E will NOT be the letter Mary selects? A. 3/8, 0.375, 37.5% B. 8/5, 1.6,

asked on February 25, 2016
4. math

Jenna says that no row or column contains products with only odd numbers. Do you agree? explain.

asked on October 27, 2014
5. MATH

Suppose that you work at the Peacock Blue store for 40 hours over five days at a rate of \$9.25/hour. You then quit your job. Deductions are FICA (7.65%), federal withholding (12%), and state withholding (8%). Your expenses are transportation at \$5.25/day,

asked on April 16, 2015
6. Algebra - HELP!!!

Can someone help me and check these? 1. Graph the function and identify the domain and range. y = –.5x² (1 point)graph *domain: (–∞, ∞) range: [0, ∞) graph domain: (–∞, ∞) range: (–∞, 0] graph domain: (–∞, ∞) range: (–∞, 0]

asked on April 22, 2014
7. physics

A 0.55 kg block of ice is sliding by you on a very slippery floor at 4 m/s. As it goes by, you give it a kick perpendicular to its path. Your foot is in contact with the ice block for 0.0025 seconds. The block eventually slides at an angle of 23 degrees

asked on January 23, 2014
8. Are all answers right?

The sample space for a roll of two number cubes is shown in the table. (1,1)|(1,2)|(1,3)|(1,4)|(1,5),(1,6) (2,1)|(2,2)|(2,3)|(2,4)|(2,5)|(2,6) (3,1)|(3,2)|(3,3)|(3,4)|(3,5)|(3,6) (4,1)|(4,2)|(4,3)|(4,4)|(4,5)|(4,6) (5,1)|(5,2)|(5,3)|(5,4)|(5,5)|(5,6)

asked on February 25, 2016
9. Calculus

A ball is dropped from a height of 10 feet and bounces. Each bounce is ¨ú of the height of the bounce before. Thus, after the ball hits the floor for the first time, the ball rises to a height of 10(¨ú ) = 7.5 feet, and after it hits the second floor

asked on April 15, 2009
10. Help Math

The sample space for a roll of two number cubes is shown in the table. (1,1)|(1,2)|(1,3)|(1,4)|(1,5),(1,6) (2,1)|(2,2)|(2,3)|(2,4)|(2,5)|(2,6) (3,1)|(3,2)|(3,3)|(3,4)|(3,5)|(3,6) (4,1)|(4,2)|(4,3)|(4,4)|(4,5)|(4,6) (5,1)|(5,2)|(5,3)|(5,4)|(5,5)|(5,6)

asked on February 25, 2016
11. Chemistry

When 0.40 g of impure zinc reacted with an excess of hydrochloric acid, 127 mL of hydrogen was collected over water at 10 degress C The external pressure was 737.7 Torr. a) What volume would the dry hydrogen occupy at 1.00 atm and 298 K ? b) What amount

asked on December 13, 2012
12. law

Suppose the statute of limitations for a particular state is 3 years and the age of majority in that state is 21. If you have medical records for a 13-year-old girl, how long should you maintain them? A. 3 years !@#\$%^&il she’s 21 B. 8 years D. Until

asked on April 20, 2009
13. Algebra or Math help

Your friend thinks that the equation k - 3.5 = 21 is a true statement. Is your friend correct? Explain why and how you figured it out

asked on November 8, 2017
14. science

when copper metal is added to silver nitrate in solution, silver metal and copper (II) nitrate are produced. what mass of silver is produced from 100.g Cu?

asked on April 19, 2016
15. Math - Help!

The sample space for a roll of two number cubes is shown in the table. (1,1)|(1,2)|(1,3)|(1,4)|(1,5),(1,6) (2,1)|(2,2)|(2,3)|(2,4)|(2,5)|(2,6) (3,1)|(3,2)|(3,3)|(3,4)|(3,5)|(3,6) (4,1)|(4,2)|(4,3)|(4,4)|(4,5)|(4,6) (5,1)|(5,2)|(5,3)|(5,4)|(5,5)|(5,6)

asked on February 26, 2016
16. College Physics

A child slides down a slide with a 24 incline, and at the bottom her speed is precisely half what it would have been if the slide had been frictionless.Calculate the coefficient of kinetic friction between the slide and the child.

asked on February 11, 2010
17. pre calc

The population of a Midwestern city decays exponentially. If the population decreased from 900,000 to 800,000 from 2003 to 2005, what will be the population in 2008? Please help I got 670,422 and the computer marked it round i then tried rounding it to

asked on March 11, 2017
18. Science help please

Use the word bank below to answer the questions that follow: conservation carbon footprint decompose slower renewable biodegradable desertification fossil fuels aquaculture hydroelectric geothermal ozone land reclamation point decompose faster nuclear

asked on January 8, 2015
19. physics

A tennis ball has a mass of 0.057 kg. A professional tennis player hits the ball hard enough to give it a speed of 52 m/s (about 117 miles per hour.) The ball moves toward the left, hits a wall and bounces straight back to the right with almost the same

asked on January 23, 2014
20. physics

A spring of stiffness 127 N/m, and with relaxed length 0.19 m, stands vertically on a table, as shown in the figure. Instead of compressing the spring with a heavy block, with your hand you push straight down on the spring until your hand is only 0.14 m

asked on January 17, 2014
21. 11

SinA + sinB/sinA - sinB= tanA+B/2cotA-B/2

asked on June 5, 2016
22. ashworth

If the manager __________ here, we could meet the person who __________ all loans. A. were; approves B. was; approves C. were; approve D. was; approve

asked on October 9, 2016
23. Titration

Consider the titration of 100.0 mL of 0.100 M NaOH with 1.00 M HBr. Find the pH at the following volumes of acid added and make a graph of pH versus Va: Va = 0, 1, 5, 9, 9.9, 10, 10.1, and 12 mL.

asked on January 23, 2012
24. physics

Consider a roller coaster as it travels near the bottom of its track as sketched in the figure below. At this point, the normal force on the roller coaster is three times its weight. If the speed of the roller coaster is 27 m/s, what is the radius of

asked on November 1, 2011
25. Math

You purchase a computer for \$875.00 plus 5% sales tax. You decide to finance it through the store's 0% program for 12 months. The terms state that you must pay \$100.00/month and that if you miss a payment, you will be assessed a late fee of \$39.00 plus the

asked on April 19, 2015
26. Physics

A football is kicked from the ground at 27 m/s at an angle of 42 degrees above the horizontal (ground). No one gets in the way until after it hits the ground. Use the value g=9.8 m/s^2. Assuming that the ground is level and that there is negligible air

asked on October 27, 2010
27. Physics

A football is kicked from the ground at 27 m/s at an angle of 42 degrees above the horizontal (ground). No one gets in the way until after it hits the ground. Use the value g=9.8 m/s^2. Assuming that the ground is level and that there is negligible air

asked on October 27, 2010
28. Geometry

1. Find the diameter of a circle with a circumference of 50 mm. Round your answer to the nearest tenth. a) 16.0 mm b) 26.4 mm c) 8.4 mm d) 33.5 mm 2. Find the area of the circle with the given radius or diameter. Round your answer to the nearest tenth.

asked on February 26, 2013
29. chemistry

Ti(s)+2Cl2(s)-TiCl4(s) compute theoretical yield in moles 8 mol Ti, 8 mol Cl2

asked on November 25, 2011
30. chemistry

1) List a series of tests that would determine the order of activity (least active to most active) for Zn, Mn, and Ag. 2) What would be the reaction for the addition of excess OH- ions to Mg(NO3)2 and Cu(NO3)2? This is a complex ion forming reaction. Would

asked on March 2, 2014
31. Chem

Which chloride should exhibit the most covalent type of bond? WHY? A) NaCl B) KCl C) BaCl2 D) BeCl2 E) CaCl2

asked on April 12, 2009
32. One Math

The sample space for a roll of two number cubes is shown in the table. (1,1)|(1,2)|(1,3)|(1,4)|(1,5),(1,6) (2,1)|(2,2)|(2,3)|(2,4)|(2,5)|(2,6) (3,1)|(3,2)|(3,3)|(3,4)|(3,5)|(3,6) (4,1)|(4,2)|(4,3)|(4,4)|(4,5)|(4,6) (5,1)|(5,2)|(5,3)|(5,4)|(5,5)|(5,6)

asked on February 25, 2016
33. Language arts check answers

If you fail to plan, you plan to fail. simple complex compound

asked on January 7, 2015
34. chemistry

The hybridization of the lead atom in PbCl4 is...?

asked on November 3, 2012
35. Math

Hillside has 12 teams. Each team plays each other teams twice. How many games are played?

asked on December 16, 2015
36. Algebra

Of 375 musicians some play only jazz band, some play only the marching band, some play both.If 250 play in the jazz band and 130 play in both, how many play in the marching band? My answer is 135

asked on October 4, 2014
37. statistics

A local country club has a membership of 600 and operates facilities that include an 18-hole championship golf course and 12 tennis courts. Before deciding whether to accept new members, the club president would like to know how many members regularly use

asked on February 9, 2013
38. math

Zoe had a board 5 1/4 feet long. She cut off a piece. Now the board is 3 5/6 feet long. How long was the piece she cut off?

asked on September 5, 2014
39. English

34.1 Revise the following sentences to eliminate unnecessary shifts in tense, mood, voice, or person and number and between direct and indirect discourse. 1. The greed of the 1980s gave way to the occupational insecurity of the 1990s, which in turn gives

asked on September 2, 2014
40. Physics

A 1200 kg car pulls a 510 kg trailer. The car exerts a horizontal force of 4040 N against the ground in order to accelerate. What force does the car exert on the trailer? Assume an effective friction coefficient of 0.160 for the trailer.

asked on October 25, 2014
41. AP Calculus

If the linearization of y= cube root of x at x=64 is used to approximate cube root of 66, what is the percentage error? a) .01% b).04% c).4% d)1% e)4%

asked on December 14, 2010
42. Math

The odometer on a car shows 26962 km. Notice that this number is a palindrome. After the car has travelled two hours at a constant rate, the odometer shows the next possible palindromic number. How fast is the car travelling?

asked on September 23, 2015
43. health

According to the AMA, what is a key reason behind a physician’s duty of confidentiality to a patient? A. The U.S. Constitution requires a physician’s confidentiality. B. The patient will feel more confident in disclosing information to the physician.

asked on April 18, 2009
44. Chemistry

The overall hydrogen burning reaction in stars can be represented as the conversion of four protons to one alpha particle. Use the data for the mass of H-1 and He-4 to calculate the energy released by this process.

asked on April 10, 2014
45. Chemistry

A student cleaned a crucible with HCl. After pouring the HCl into the waste container, the crucible was neither rinsed with water or dried before the student added the NaHCO3 and KCl mixture. The crucible contained some residual HCl. How would this

asked on February 2, 2014
46. trig

a ferris wheel with a radius of 14m makes one revolution every 30 seconds. the bottom of the wheel is 2.5m above the ground. a) find the equation b) how does the equation change if the graph starts at the centre of rotation

asked on December 9, 2018
47. MATH

You purchase a computer for \$875.00 plus 5% sales tax. You decide to finance it through the store's 0% program for 12 months. The terms state that you must pay \$100.00/month and that if you miss a payment, you will be assessed a late fee of \$39.00 plus the

asked on April 20, 2015
48. legal aspects of health information

Dr. Pearson has recently been hired into the Central City Internal Medicine Group as its fifth physician. He has recently completed his residency and is eager to enter private practice. Dr.Pearson is introduced to Meredith and Dawn, two members of the

asked on April 11, 2015
49. algebra

a chemist needs 10 liters of a 25% acid solution. the solution is to be mixed from three solutions whose acid concentrations are 10% 20% 50% how may liters of each solution should the chmist use to satisfy the following? a use as little as possible of the

asked on April 26, 2008
50. math

On December 10, 1999, Apple Computers' stock was valued at \$615 billion; Microsoft's stock was valued in that quarter at \$271 billion. How much more value is Apple's stock at its peak over Microsoft?

asked on February 4, 2017

estimate 5,602 - 2,344

asked on September 29, 2009
52. Principles of Math 11

A ranger in fire tower A spots a fire at a bearingof 295 degrees.A ranger in fire tower B located 45 miles at a bearing of 45 degrees from tower A spots the same fire at a bearing of 255 degrees. How far away from tower A is the fire?

asked on June 8, 2008
53. calculus

Consider the graph of the cosine function shown below. y=4 cos (2 x) a. Find the period and amplitude of the cosine function. b. At what values of θ for 0 ≤ θ ≤ 2π do the maximum value(s), minimum value(s), and zeros occur? so i don't know how to

asked on February 4, 2019
54. pre calc

The population of a Midwestern city decays exponentially. If the population decreased from 900,000 to 800,000 from 2003 to 2005, what will be the population in 2008? Please help I got 670,422 and the computer marked it wrong i then tried rounding it to

asked on March 11, 2017
55. physical science

Picnickers see a lightning flash and hear the resulting thunder 9.0 s later. If the storm is traveling at a rate of 15 km/h, then how long, in minutes, do the picnickers have before the storm arrives at their location?

asked on March 10, 2015
56. Art

What advantage does multi-spectral analysis hold over the X-ray Machine? a. Multi-spectral analysis can analyze pigments that an X-ray cannot detect b. multi-spectral analysis reveals what is not visible to the naked eye c. multi-spectral analysis can be

asked on January 27, 2015
57. statistics

In a local university,40% of the students live in the dormitories. A random sample of 80 students is selected for a particular study. What is the probability that the sample proportion (the proportion living in the dormitories) is between 0.30 and 0.50?

asked on November 11, 2009
58. legal aspect of health information

is Dr. Pearson subject to liability although he doesn't know Meridith is conducting fraud activities

asked on April 11, 2015
59. chemistry

The molar volume of a certain form of solid lead is 18cm3/mol. Assuming cubic closest packed structure, determine the number of Pb atoms per unit cell.

asked on November 3, 2012
60. chemistry

Compare the chemical composition of methane and ethanol to carbon dioxide. Which one can be said to be the complete oxidation of glucose? I thought is was methane but I got it wrong can you explain please.

asked on August 4, 2010
61. Science :)

A football is kicked from the ground at 27 m/s at an angle of 42 degrees above the horizontal (ground). No one gets in the way until after it hits the ground. Use the value g=9.8 m/s^2. Assuming that the ground is level and that there is negligible air

asked on October 28, 2010
62. Algebra

Find the average speed Hike 52 miles in 3 days Drive 69 kilometers in 3/4 hour

asked on September 15, 2013
63. Health

Who is the only person who can authenticate the information in a patient’s medical record? A. The attending physician B. The attending nurse C. The medical facility that’s caring for the patient D. The person who creates the data in the record C

asked on April 18, 2009
64. Math

32. The area of a square postage stamp is 81/100 in. to the second power. What is the side length of the stamp? 33. The area of a square boxing ring is 484 ft. to the second power. What is the perimeter of the boxing ring?

asked on January 23, 2014
65. Calculus

A steady wind blows a kite due west. The kite's height above ground from horizontal position x = 0 to x = 60 ft is given by the following. y= 155-(1/40)(x-50)^2

asked on February 4, 2014
66. Physics

Two rocks are thrown off the edge of a cliff that is 15.0 m above the ground. The first rock is thrown upward, at a velocity of +12.0 m/s. The second is thrown downward, at a velocity of −12.0 m/s. Ignore air resistance. Determine (a) how long it takes

asked on September 12, 2010
67. ghost in city hall

Hello all. Does anyone have a scanned copy of "ghost in city hall" worksheet? It is a math worksheet. Thank you, Sandy

asked on April 26, 2008
68. Math

Draw a concave quadrilateral that is not an arrowhead

asked on May 28, 2014
69. Chemistry

3. How does dissolved CO2 in distilled water affect the accuracy of the determination of a NaOH solution's concentration? The CO2 in the distilled water will create a more acidic solution which will affct the determination of NaOH solution's concentration?

asked on March 11, 2014
70. Finance

Hooks Athletics, Inc., has outstanding a preferred stock with a par value of \$30 that pays a dividend of \$2.50. The preferred stock is redeemable at the option of the stockholder in 10 years at a price equal to \$30. The stock may be called for redemption

asked on January 10, 2011
71. Science

How long would a day be in seconds if the Earth were rotating so fast that objects at the equator were apparently weightless?

asked on October 2, 2009
72. 4th Grade Math

The ratio of the number of dogs to the number of cats at an animal shelter is 5:4, if there is a total of 153 cats and dogs, how many cats are in the shelter

asked on May 20, 2015
73. Science ~ Structures and Properties of Matter

1) Both carbon dioxide and water are pure substances. How are they similar to each other? A. both substances have a set ratio of atoms that cannot be separated by physical means. B. both substances have a set ratio of atoms that can be separated by

asked on January 28, 2014
74. Math/Standard and scientific notation

Express each measure in standard form. (One more thing by the way you need this few prefixes) Tera= 10 to the 12th power Giga= 10 to the 9th power Mega= 10 to the 6th power Kilo= 10 to the 3rd power Pico= 10 to the -12th power Nano= 10 to the -9th power

asked on February 25, 2009
75. Chemistry

In this experiment NaOH is standardized to find out the percent by mass of the acetic acid in a sample of vinegar. A student had not allowed the NaOH pellets to dissolve completely before standardizing it with KHP, but when the student refilled the buret

asked on March 29, 2014
76. chemistry

The laboratory tech accidentally mixed NaHCO3 with BaCl2-2H2O instead of KCl when preparing unknown mixture for this experiment. How would this mistake affect the calculated percentage of NaHCO3 in the mixture? Justify answer with an explanation. Is it

asked on February 2, 2014
77. statistics

Assume that the readings on the thermometers are normally distributed with a mean of 0 degrees and standard deviation of 1.00 degrees C. A thermometer is randomly selected and tested. Draw a sketch and find the temperature reading corresponding to p

asked on October 30, 2014
78. chemistry

A student dried a wet crucible with a Kimwipe. A piece of Kimwipe was left clinging to the inside wall of the crucible, The student did not see the piece of Kimwipe when adding the NaHCO3-KCl mixture to the crucible. The crucible ans its contents were

asked on February 2, 2014
79. Chemistry

Consider the following reaction: H2(g) + I2(s) ---> 2HI(g) TriangleH = 51.9 kj (enthalpy) Calculate the standard enthalpies of reaction for the following reaction: 6HI(g) ---> 3H2(g) + 3I2(s) Thanks!

asked on April 28, 2012
80. Math

If Angel plants the same number of flowers in each of 5 rows, he will have none left over. If he plants 1 in the first row and then 1 more in each row than he did in the previous row, he will plant flowers in only 4 rows. how many flowers does he have?

asked on February 18, 2010
81. College Physics

What will a spring scale read for the weight of a 73 kg woman in an elevator that moves upward with constant speed of 5.4 m/s?

asked on February 16, 2010
82. Math

An employee's annual salary was increased from \$22,464.00 to \$24,710.40 last year.If it is increased by the same percent this year,what will be the employee's salary? Thanks!

asked on October 28, 2016
83. MATH

Select the measure of the complement or supplement of the angle. If there is no complement or supplement, select no complement or supplement. 55.1° 124.9° 119.9° 49.9° no complement or supplement

asked on February 4, 2014
84. Math quadratic function

Jose bautista hits a baseball that travels for 142m before it lands. The flight of the ball can be modelled by a quadratic function in which x is the Horizontal distance the ball has travelled away from jose, and h(x) is the height Vertical distance of the

asked on July 23, 2015
85. Chemistry

In this experiment NaOH is standardized to titrate it with vinegar so thtat the percent by mass of the acetic acid can be determined. How does dissolved CO2 in distilled water affect the accuracy of the determination of a NaOH solution's concentration? How

asked on March 29, 2014
86. Math

in division why should the remainder not be greater than the divisor

asked on March 6, 2013
87. statistics

Accuracy of price scanners at Wal-Mart. The National Institute for Standards and Technology (NIST) mandates that for every 100 items scanned through the electronic checkout scanner at a retail store, no more than 2 should have an inaccurate price. A recent

asked on February 24, 2013
88. auditing

Catherine goes to her local movie theater only to see romantic comedies. Since Catherine did not go to the movies yesterday, there is not a romantic comedy playing at her local theater. The reasoning above is flawed because the evidence (Points : 1)

asked on January 8, 2012
89. Chemistry

What is mass in grams of a pure iron cube that has a volume of 4.10 cm3

asked on April 29, 2016
90. Math

Really need help with this: You purchase a computer for \$875.00 plus 5% sales tax. You decide to finance it through the store's 0% program for 12 months. The terms state that you must pay \$100.00/month and that if you miss a payment, you will be assessed a

asked on April 20, 2015
91. English

Revise the following sentences as needed to create pronoun-antecedent agreement and to eliminate the generic he and any awkward pronoun references. 1. While shopping for a new computer for school, I noticed that a laptop costs much less that they used to.

asked on September 3, 2014
92. Chemistry

Titration was used to determine the molarity of acetic acid in vinegar. A primary standard solution of KHP was used to standardize the NaOH. 1. When performing this experiment, impure KHP was used to standardize the NaOH solution. If the impurity is

asked on March 28, 2014
93. Calculus

A steady wind blows a kite due west. The kite's height above ground from horizontal position x = 0 to x = 60 ft is given by the following. y= 155-(1/40)(x-50)^2 Find the distance traveled by the kite.

asked on February 4, 2014
94. English

Look at the following sentences, which use the passive voice. Then rewrite each sentence in the active voice, and decide which version you prefer and why. 1. Mistakes were made. a. I made mistakes. 2. Musical legends such as Ray Charles, Billie Holiday,

asked on September 3, 2014
95. stats

An automobile repair shop has determined that the average service time on an automobile is 2 hours with a standard deviation of 32 minutes. A random sample of 64 out of 400 services is selected. What is the probability that this sample will have a mean

asked on November 11, 2009
96. law

Suppose the statute of limitations for a particular state is 3 years and the age of majority in that state is 21. If you have medical records for a 13-year-old girl, how long should you maintain them? A. 3 years !@#\$%^&il she’s 21 B. 8 years D. Until

asked on April 20, 2009
97. Math grade 11 u

Jose bautista hits a baseball that travels for 142m before it lands. The flight of the ball can be modelled by a quadratic function in which x is the Horizontal distance the ball has travelled away from jose, and h(x) is the height Vertical distance of the

asked on July 22, 2015
98. Math

Kenji has a box containing many blue rods, each one 252 cm long. Mei-Ling has a box containing many green rods, each one 408 cm long. They each start making a long line of rods of their colour by laying rods end to end. After a while, their lines are

asked on April 22, 2015
99. Calculus

a)Find the number a such that the line x = a bisects the area under the curve y= 1/x^2, 1

asked on January 25, 2014
100. 4th grade math

What is an expanded algorithm? Son doesn't know and didn't bring home his textbook, any ideas?

asked on October 26, 2011