Most popular questions and responses by Alyssa
  1. Language arts

    What is the name of the online textbook used in this course A) Language arts B) The big question C) Literature D) Write to learn

    asked on January 25, 2017
  2. Physics

    A black mamba snake has a length of 4.3 m and a top speed of 8.9 m/s! Suppose a mongoose and a black mamba find themselves nose to nose. In an effort to escape, the snake accelerates at 20 m/s2 from rest. (a) How much time does it take for the snake to

    asked on August 29, 2015
  3. Algebra 1

    Just checking my answers. What is the sum or difference? 1. 2x^4 - 8x^4 A. -6x^8 B. -6x^4*** C. -16x^4 D. -16x^8 What is the sum or difference 2. 10y^10 - 14y^10 A. -4y^20 B. -140y^20 C. -140y^10 D. -4y^10*** 3. Write the polynomial in standard form. Then

    asked on October 24, 2016
  4. Chemistry

    net ionic equation to show that sulfurous acid, H2SO3, behaves as an acid in water. I got this answer but do not know if it is correct. H2SO3 + H2O --- H3O + SO I am Not sure if its is tri/mono/diprotic

    asked on April 30, 2017
  5. AP Calculus

    In the answer space below, provide the larger of the two positive integers that add up to 60 and have the largest possible product.

    asked on October 16, 2014
  6. AP Calculus

    If 600 cm2 of material is available to make a box with a square base and a closed top, find the maximum volume of the box in cubic centimeters. Answer to the nearest cubic centimeter without commas. For example, if the answer is 2,000 write 2000.

    asked on October 16, 2014
  7. science

    1.Darwin assumed that evolutionary change was always slow and gradual. What was the first evidence that suggested evolution change might happen fast sometimes? A. Homologous structures B. Fossils*** C. Reproduction rates D. DNA sequences 2.Which of the

    asked on October 9, 2014
  8. algebra

    Combine like radical terms -7\sqrt(6-5 ) \sqrt(54)

    asked on May 4, 2017
  9. History

    Which accurately describes Isaac Newton’s clockwork universe theory? A. It compares the universe to a mechanical clock wound up by God, with its gears governed by the laws of physics. B. It compares the universe to London’s Big Ben clock tower,

    asked on April 8, 2019
  10. physics

    the muzzle velocity of a 50.0g shell leaving a 3.00kg rifle is 400 m/s what is the recoil velocity of the rifle

    asked on December 16, 2012
  11. Math

    lucky drew an isosceles triangle as shown if the measures of XYZ is 25 what is the measure of XYZ

    asked on February 14, 2017
  12. Chemistry

    Two moles of a nonelectrolyte solute are dissolved in 1 kg of an unknown solvent. The solution freezes at 7.8 degrees Celsius below its normal freezing point. What is the molal freezing point constant of the unknown solvent? What is your prediction for the

    asked on May 17, 2010
  13. Science

    what geographical features create natural boundaries for water to flow toward one ocean or another?

    asked on September 21, 2016
  14. Math

    A company did a quality check on all the packs of trail mix it manufactured. Each pack of trail mix is targeted to weigh 9.25 oz. A pack must weigh within 0.23 oz of the target weight to be accepted. What is the range of rejected masses, x, for the

    asked on October 28, 2017
  15. Math

    Which equation can be used to find the measure of an angle that is supplementary to POS

    asked on February 15, 2017
  16. calculus

    the area of the first quadrant bounded by the y-axis, the line y=4-x, and the graph of y=x-cosx is approximately

    asked on February 26, 2012
  17. Spanish

    I have to answer negatively. ¿Podemos ir a la playa o nadar en la piscina? I answered.. No, no podemos ir a la playa ni nadar en la piscina. But it says there is a word missing between podemos and ir. I tried.. No, no podemos no ir a la playa ni nadar en

    asked on March 16, 2017
  18. History

    Which best describes the Vatican’s relationship with Spain during the 15th century? A) Spain was fervently Catholic and Spanish gold raised numerous buildings in Rome. B) Spain and the Vatican formed the Schmalkaldic League to fight the French. C) Spain

    asked on March 26, 2019
  19. Math

    How many 1 inch squares can be cut from an 18"x24" piece of contruction paper

    asked on October 27, 2015
  20. Nassau

    The length of the smaller rectangle at the right is 1 inch less than twice its width. Both the dimensions of the larger rectangle are 2 inches longer than the smaller rectangle. The area of the shaded region is 86 square inches. What is the area of the

    asked on August 4, 2011
  21. algebra

    i need help with these problems (either a solution or how to plug them into a graphing calculator): 1) Solve by substitution or elimination 4/x + 1/y + 2/z = 4 2/x + 3/y - 1/z = 1 1/x + 1/y + 1/z = 4 2)Solve the system of equations by substitution. x^2 +

    asked on April 5, 2011
  22. History

    Which best describes the beginning of the American Revolutionary War? A. Great Britain and France declared war, known as the French and Indian War. B. American colonists fought the British at the Battles of Lexington and Concord. C. Great Britain signed

    asked on April 9, 2019
  23. Pre-Calc

    I am really struggling with how to do these problems, I posted them a few minutes ago but the answers/work shown was incorrect. 1) a) Use an Addition or Subtraction Formula to write the expression as a trigonometric function of one number. cos 12° cos

    asked on April 13, 2015
  24. History

    Which most accurately describe humanist artistic innovations during the Renaissance? (Select all that apply.) Characters in medieval paintings were two-dimensional and unproportioned, while Renaissance paintings were lifelike and realistic. Nude paintings

    asked on March 22, 2019
  25. Geography

    What is absolute location? A. a precise measure of where a location falls in terms of longitude and latitude using units such as minutes and seconds B. a precise measure of distance around the equator C. a more precise measure of where a location falls in

    asked on January 28, 2018
  26. Chemistry

    Given that HSO4- is a stronger acid than HPO4^2-, what is the chemical reaction if solutions containing these ions are mixed together? (Hints: One of these must act as an acid and the other as a base. Use the Brønsted-Lowry definition) Please explain how

    asked on May 9, 2017
  27. Chemistry

    A sample of nitrogen gas occupies 1.55 L at 27oC and 1 atm pressure. What will the volume be at -100oC and the same pressure?

    asked on February 9, 2011
  28. Chemistry

    help please! At 2200°C, K = 0.050 for the following reaction. N2(g) + O2(g) 2 NO(g) What is the partial pressure of NO in equilibrium with N2 and O2 that were placed in a flask at initial pressures of 0.75 atm and 0.30 atm, respectively?

    asked on November 18, 2010
  29. chemistry

    When 47.5J of heat are added to 13.2 g of liquid, its temperature rises by 1.72 degrees C. What is the heat capacity of the liquid? A cook wants to heat 1.35kg of water from 32.0 degrees C to 100 degrees C. If he uses combustion of natural gas to heat the

    asked on September 21, 2012
  30. Chemistry

    Suppose that coal of density 1.5 g/cm3 is pure carbon. (It is, in fact, much more compli- cated, but this is a reasonable first approxima- tion.) The combustion of carbon is described by the equation C(s) + O2(g) −→ CO2(g) ∆H◦ = −394 kJ What is

    asked on May 22, 2014
  31. Social Studies

    Choose the teachings of Confucius that created Confucianism. Select all that apply. burning paper money the way yin and yang 5 relationships Honoring Elders severe punishments filial piety I think it is 5 relationships and the filial piety

    asked on November 28, 2018
  32. Pre-Calc

    1) Use an Addition or Subtraction Formula to write the expression as a trigonometric function of one number. cos 12° cos 18° − sin 12° sin 18° And Find its exact value. 2) Use an Addition or Subtraction Formula to write the expression as a

    asked on April 13, 2015
  33. History

    Mark the statement if it describes Roman society during the time of Cincinnatus. A. Rome’s government was based on law in which many people had a voice. B. Rome was being surrounded and threatened by outside forces. C. People in Rome admired those who

    asked on April 23, 2014
  34. science

    3.If a gap in the fossil record exists between ancient and modern forms of a species, which of the following is the most appropriate conclusion? A. The gap indicates that gradualism must have occurred for the species to evolve from ancient to modern

    asked on October 9, 2014
  35. Physics

    Two resistors 10ohms and 5ohms are connected in parallel across a 15V battery. What is the potential difference across the 10ohms resistor. I do not need the answer just the formula and how to figure out the problem. Thanks.

    asked on August 3, 2014
  36. physics

    A merry-go-round in the park has a radius of 1.8 m and a rotational inertia of 900kgm^2. A child pushes the merry-go-round with a constant force of 80 N applied at the edges and parallel to the edge. A frictional torque of 12 Nm acts at the axle of the

    asked on October 17, 2010
  37. Biology

    How are decomposers like a city's recycling center?

    asked on September 25, 2012
  38. Social studies

    how did northern and southern responses to the fugitive slave law affect their relationship? deepened on fear and anger deepened the commitment to compromise encouraged northern commitment to end plantation life encourage southern

    asked on January 29, 2015
  39. Physics

    A spring that has a spring constant of 150 N/m is oriented vertically with one end on the ground. (a) What distance does the spring compress when a 4-kg object is placed on its upper end? in m. (b) By how much does the potential energy of the spring

    asked on October 23, 2015
  40. Physics

    A circular conducting coil with radius 3.40 cm is placed in a uniform magnetic field of 1.090 T with the plane of the coil perpendicular to the magnetic field. The coil is rotated 180° about the axis in 0.222 s. (a) What is the average induced emf in the

    asked on February 17, 2013
  41. Chemistry

    What mass of electrons would be required to just neutralize the charge of 3.9 grams of protons?

    asked on October 14, 2010
  42. math grade 10 math

    A map shows a main gas pipeline running straight from A(45,60) to B(65,40) a) Is the point C(63,54) on the branch pipeline? Explain your reasoning b) What is the shortest route for connecting point C to the main pipeline.Explain **OMGGGG PLZZZ HELPPP,

    asked on December 23, 2009
  43. Economics

    What do most economists believe about the future of business cycles? A. Business cycles will grow more extreme, with higher peaks and deeper troughs. B. Advances in technology have brought business cycles to an end. C. Business cycles will continue to

    asked on April 19, 2009
  44. grade 10 math- slope/midpoint/length formulas

    A map shows a main gas pipeline running straight from A(45,60) to B(65,40) a) Is the point C(63,54) on the branch pipeline? Explain your reasoning b) What is the shortest route for connecting point C to the main pipeline.Explain **OMGGGG PLZZZ HELPPP,

    asked on December 23, 2009
  45. Biology (PLZ HELP)

    Researchers discovered that zooplankton in Narragansett Bay now graze on floating algae more actively through the winter than they ever did before. What effect do you think this might have on the annual late-winter "bloom" of algae that occurs in the

    asked on September 25, 2012
  46. Physics

    Determine the magnitude and direction of the displacement if a man walks 32.5 km 45° north of east, and then walks due east 19.5 km.

    asked on September 28, 2010
  47. Math

    write a rule to describe the translation of a point from (-3 3) to (-2 2) A)

    asked on April 5, 2017
  48. Math

    Samantha wants to buy 6 roses 4 carnations and 8 tulips she estimates that she will spend about 14 dollars on these flowers do you agree math chapter 5

    asked on December 1, 2014
  49. AP ENGLish

    Many plays and novels use contrasting places (for example, two countries, two cities or towns, two houses, or the land and the sea) to represent opposed forces or ideas that are central to the meaning of the work. Explain this contrast within the play,

    asked on January 16, 2017
  50. physics

    A point charge of +1 µC is located at x = −2 cm and a second point charge of −8 µC is located at x = 6 cm. Where should a third charge of +1 µC be placed so that the electric field at x = 0 cm is zero?

    asked on January 15, 2013
  51. Social studies

    The Macdonald-Cartier bridge that stretches the Ottawa River and connects Ontario to Quebec is named for two Canadian politicians, one ______ and one _______. A)English, German B)Inuktitut, French C)French, Cree D)English, French

    asked on March 17, 2017
  52. History

    What text from China was introduced to India during the Age of Discovery and meshed well with Hindu beliefs? A) Thirty-Six Stratagems B) The Methods of the Sima C) Art of War D) I Ching I think it's D?

    asked on March 27, 2019
  53. Physics

    A box is on a flat plane and has a force of 16 N applied downward to it at an angle of 55 degrees. The box has a mass of 28 kg. What is the minimum horizontal force F needed to make the box start moving in (Figure 1)? The coefficients of kinetic and static

    asked on October 6, 2017
  54. socials 11 (post war 1946-1980)

    what was the extent of Canada's involvement in the Marshall Plan?

    asked on July 17, 2013
  55. math

    The markup on a restaurant mean is 250%. A meal costs $7.25 to produce. How much will the customer be charged, after markup and 5% GST are applied?

    asked on July 4, 2013
  56. chemistry

    How many moles of Pb(SO4)2 are equivalent to 157.9 g of Pb(SO4)2 (Mw. 399.34 g/mol)?

    asked on October 29, 2017
  57. chemistry

    What pairs of ions produce similar colours in the flame test? Use your periodic table of elements to explain the reason for this. The pairs with similar colours were Ba2+ and Cu2+, and Sr2+ and Li+. Ba and Cu had light green-ish colours, and Sr and Li had

    asked on February 17, 2015
  58. physics

    A wagon is pulled by a handle making an upward angle of 25° with a force of 25 N. What is the horizontal force pulling the wagon foward? What is the force lifting the wagon off the road?

    asked on November 3, 2012
  59. statistics

    A manufacturer of cell phones has decided that an assembly line will be considered to be operating satisfactorily if less than 0.02% of the phones produced per day are defective. To check the quality of a day's production, the company decides to randomly

    asked on February 22, 2012
  60. Elective Child Daycare Management

    1. Which one of the following statements uses language best to present a clear picture of a child's behavior? A. Leslie ran to the door, greeting his mother with open arms. B. Carolyn carried her books to the table. C. Marshall handed the truck to Jacob.

    asked on June 18, 2010
  61. Physics

    Charge A, +1 μC, is positioned at the origin of a coordinate system as shown below. Charge B, −1 μC, is fixed at x = 3 m. (a) Determine the magnitude and direction of the force that charge B exerts on charge A. (b) What is the force that charge A

    asked on January 29, 2016
  62. Geometry

    If the length of one base of a trapezoid is 5, the length of the other base is 2x + 7, and the length of the midsegment is 6x – 24, what is the value of x? Show equations and all work that leads to your answer.

    asked on January 22, 2010
  63. chemistry

    the closeness of a measurement to its true value is a measure of its________. percent error?

    asked on September 30, 2007
  64. AP human Geo

    Which of the following maps would be likely to use a larger-scale to represent distance? -A map of the country of Saudi Arabia -A map of Albuquerque, New Mexico -A map of the continent of South America -A map of the world -A map of the European Union

    asked on June 29, 2019
  65. 4 grade math

    Find two mixed numbers so that the sum is 15 3/10 and the difference is 8 5/10

    asked on May 21, 2013
  66. Physics

    A student pushes stright along the handles of a mower with a force of 200 N. The handles make a angle of 20°, with respect to the horizontal. The frictional force for the 25 kg mower is 100 N. What is the normal force on the mower, and what is the

    asked on October 31, 2012
  67. Calculus ll - Improper Integrals

    Find the area of the curve y = 1/(x^3) from x = 1 to x = t and evaluate it for t = 10, 100, and 1000. Then find the the total area under this curve for x ≥ 1. I'm not sure how to do the last part of question ("find the the total area under this curve for

    asked on October 2, 2010
  68. AP chemistry

    001 (part 1 of 2) 10.0 points A 1.37-gram sample of compound X (of MW 88.0 g/mol) was burned in a bomb calorime- ter containing 1700 g of water. A temperature rise of 0.95◦C was observed. ∆Erxn for this re- action is −475 kJ/mol of X. What is the

    asked on October 27, 2013
  69. Science

    How do seismologists locate the epicenter of earthquakes?

    asked on May 19, 2019
  70. Physics

    At t=0 a particle leaves the origin with a velocity of 5.0 m/s in the positive y direction, its acceleration is given by a=3i-2j m/s^2 At the instant the particle reaches its maximum y coordinate, how far is it from the origin? I'm not sure how to do a

    asked on October 17, 2015
  71. biology

    why is anaphase the shortest stage in the cell cycle?

    asked on October 14, 2015
  72. 4th grade math

    Find two mixed numbers so that the sum is 8 4/8 and the difference is 2 2/8

    asked on May 21, 2013
  73. Physics

    When a 9.00 kg mass is placed on top of a vertical spring, the spring compresses 4.5cm, FIND THE FORCE CONSTANT OF THE SPRING.

    asked on November 29, 2009
  74. Math

    PLEASE SHOW YOUR WORK.. Marty paid $72 for a jacket that had been marked down 20%. Create a linear model to represent this and use it to calculate the original price of the jacket.

    asked on January 21, 2015
  75. Chemistry

    Given that the vapor pressure of water is 17.54 Torr at 20 °C, calculate the vapor-pressure lowering of aqueous solutions that are 1.90 m in (a) sucrose, C12H22O11, and (b) aluminum chloride. Assume 100% dissociation for electrolytes. I got .5799 Torr for

    asked on March 26, 2014
  76. Physics

    (a) Estimate the positive charge in you due to the protons in the molecules present in your body. (Assume that the human body is made entirely out of water.) (b) What is the net charge in your body?

    asked on January 29, 2016
  77. math

    The stopping distance of a car traveling 25mph is 61.7ft, and for a car traveling 35mph it is 106ft. The stopping distance in feet can be described by the equation y=ax^2 + bx + c, where x is the speed in mph. Find the values of a and b.

    asked on October 21, 2011
  78. physics

    The three ropes are tied to a small, very light ring. Two of the ropes are anchored to walls at right angles, and the third rope pulls as shown: F=85 N, q=54°. What is the magnitude of the tension force in the first rope

    asked on January 31, 2011
  79. pre-algebra

    Wel-min makes a square quilt that has an area of 100 square feet.It has 25 square blocks, each the same size. What is the legth of each side of a block? A-2 feet B-4 feet C-6 feet D-10 feet

    asked on October 30, 2014
  80. Physics

    A 14.1 μF capacitor is charged to a potential of 45.0 V and then discharged through an 80.0 Ω resistor. (a) How long after discharge begins does it take for the capacitor to lose 90.0% of the following? (i) its initial charge in seconds (ii) its initial

    asked on February 18, 2016
  81. Chemistry

    Explain why the FeCl3-KCI-HCl solution was used as a reference solution. Suggest a procedure you could follow to determine whether it was necessary to use this solution as a reference or whether distilled water would have been just as satisfactory.

    asked on July 10, 2013
  82. 9th grade chemistry

    Is the name for CuH2PO4 copper dihydrogen phosphate? I don't really understand the ones with the H2 in them... thanks

    asked on December 4, 2008
  83. Math

    To study the efficiency of its new price-scanning equipment, a local supermarket monitored the amount of time its customers had to wait in line. The frequency distribution in the following table summarizes the findings. Find the standard deviation of the

    asked on April 15, 2017
  84. science

    I have a question from an old exam that I need help to understand, i'm not sure where to start An electron in an electronically excited hydrogen atom undergoes a transition from a 6d to a 2p orbital, resulting in the emission of a photon. The photon

    asked on October 16, 2015
  85. math

    Daphne gave away 3 more than half her apples. She gave away 17 apples in all. how many apples did she have originally?

    asked on September 22, 2014
  86. Physics

    A car goes around a curve on a road that is banked at an angle of 30 degrees. Even though the road is slick the car will stay on the road without any friction between its tires and the road when its speed is 24.0 m/s. WHAT IS THE RADIUS OF THE CURVE?

    asked on November 29, 2009
  87. Biology

    What are the differences between reflex (involuntary) actions, and voluntary actions in terms of the way nerve impulses are transmitted through the neurones? For instance, i know that in a reflex action, say, a prick of the needle on your hand, will

    asked on July 25, 2009
  88. American History

    What policies did Teddy Roosevelt pursue? Which policies were successful? Which policies were not successful?

    asked on November 5, 2018
  89. algebra

    Ed Moura has $21000 invested in stocks paying 8%. How much additional money should he invest in certificates of deposit paying 4% so that the average return on the two investments is 5%?

    asked on March 12, 2015
  90. College Physics Question

    The position of a ball as a function of time is given by x=(5.3m/s)t + (−11m/s^2)t^2 What would be the acceleration of the ball, and the velocity from t=0 to t=1s ?

    asked on September 17, 2017
  91. PhysicsIn what direction relative to north must ca

    Two canoeists start paddling at the same time and head toward a small island in a lake, as shown in the figure . Canoeist 1 paddles with a speed of 1.60 at an angle of 45 north of east. Canoeist 2 starts on the opposite shore of the lake, a distance of 1.5

    asked on February 9, 2012
  92. 5TH grade math

    estimate each sum or differnce. 7.4 + 3.1+ 9.8 How do I do this?

    asked on August 25, 2011
  93. Science

    why is burning magnesium an irreversible reaction?

    asked on October 3, 2014
  94. Chemistry

    calculate the natural logarithm and reciprocal concentration at 0 seconds and NO2 concentration (M) of .8333 and at time 20 (seconds) and .4617 NO2 concentration (M)

    asked on July 22, 2013
  95. physics

    A 346 kg merry-go-round in the shape of a horizontal disk with a radius of 1.7 m is set in motion by wrapping a rope about the rim of the disk and pulling on the rope. How large a torque would have to be exerted to bring the merry-go-round from rest to an

    asked on November 27, 2012
  96. physics

    A wagon is pulled by a handle making an upward angle of 25° with a force of 25 N. What is the horizontal force pulling the wagon foward? What is the force lifting the wagon off the road?

    asked on October 31, 2012
  97. calculus

    Suppose that the sales at Borders bookstores went from 70 million dollars in 1989 to 415 million dollars in 1993. What is the continuous percent growth rate, per year, of sales?

    asked on January 17, 2011
  98. MATH GRADE 10****

    Scott, Arif, and Diane run a small delivery company. For thier business, they use licensed two-way radios with a 20 km range. Scott is at their office which they have marked as the origin on their map of the town. Arif is dropping off a package at (-8, 16)

    asked on December 25, 2009
  99. Math

    An ant walks 30 feet in 6minutes. How long will it take the ant to walk 35yards?

    asked on November 1, 2018
  100. physics

    The planetMars requires 2.35 years to orbit the sun, which has a mass of 2 × 1030 kg, in an almost circular trajectory. Find the radius of the orbit of Mars as it circles the sun. The gravitational constant is 6.672 × 10−11 N · m2/kg2 . Answer in

    asked on November 8, 2012


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