1. ## math

Can someone please help me/ Sal's Sandwich Shop sells wraps and sandwiches as part of its lunch specials. The profit on every sandwich is \$2 and the profit on every wrap is \$3. Sal made a profit of \$1,470 from lunch specials last month. The equation 2x +

Three people play a game of "nonconformity": They each choose rock, paper, or scissors. If two of the three people choose the same symbol, and the third person chooses a different symbol, then the one who chose the different symbol wins. Otherwise, no one

3. ## CALCULUS

1. A rectangular package to be sent by a postal service can have a maximum combined length and girth (perimeter of a cross section) of 108 inches. Find the dimensions of the package of maximum volume that can be sent. (Assume the cross section is square.)

4. ## PHYSICS

The highest recorded waterfall in the world is found at Angel Falls in Venezuela. Its longest single waterfall has a height of 807 m. If water at the top of the falls is at 16.7°C, what is the maximum temperature of the water at the bottom of the falls?

5. ## chemistry

Ima Chemist found the density of Freon-11 (CFCl3) to be 5.58 g/L under her experimental conditions. Her measurements showed that the density of an unknown gas was 4.38 g/L under the same conditions. What is the molar mass of the unknown?

6. ## PHYSICS 2

Two resistors have resistances R(smaller) and R(larger), where R(smaller) < R(larger). When the resistors are connected in series to a 12.0-V battery, the current from the battery is 1.99 A. When the resistors are connected in parallel to the battery, the

7. ## Biology

What are two traits of an information source that may indicate the information given is scientifically unreliable? Answer: peer review does not necessarily indicate that the other field expert reviews are in agreement with conclusions of the original

8. ## Math

I am terrible at ellipse The base of an auditorium is in the form of an ellipse 200ft long and 100 ft wide. A pin dropped near one focus can clearly be heard at the other focus. Determine the distance between the foci to the nearest tenth of a foot. Show

9. ## Maths

Around a circle i place 64 equally spaced points, so that there are 64x63 divided by2=2016 possible chords between these points. I draw some of these chords, but each chord cannot cut across more than one other chord. What is the maximum number of chords I

One night the King couldn't sleep, so he went down into the Royal kitchen, where he found a bowl full of mangoes. Being hungry, he took 1/6 of the mangoes. Later that same night, the Queen was hungry and couldn't sleep. She, too, found the mangoes and took

11. ## Algebra

John is thinking about buying a house for \$179,000. The table below shows the projected value of two different houses for three years. Number of years 1 2 3 House 1 (value in dollars) 186,160 193,606.40 201,350.66 House 2 (value in dollars) 190,000 201,000

12. ## chemistry

Examine the statement. Substances dissolve through three processes: I. ionization II. dissociation III. dispersion Which of the answer choices correctly lists the dissolving processes that change the identity of a substance? I and II II and III I,II and

13. ## physics

At most, how many bright fringes can be formed on either side of the central bright fringe when light of wavelength 656 nm falls on a double slit whose slit separation is 3.45 × 10-6 m?

14. ## chemistry

Which of the statements correctly describes the reactivity of noble gases, according to the octet rule? They have eight electrons in their valence shell, so noble gases are very unreactive. They have eight electrons in their valence shell, so noble gases

15. ## math

The measure of angle A is 124 degrees. What is the correct classification for angle A? a. acute b. right c. obtuse d. straight I'm pretty sure it's c. Right?

16. ## english-macbeth

in Act I, Scene iii, line 19 the witches say "I'll drain him dry as hay" I have to explaion this quotation but i don't quite undertsand what it means. Please help! this similie means: this is a metaphor that simply means that whatever they are "draining"

17. ## chemistry

Examine the scenario. A magnesium (Mg) atom gives one electron to two atoms of another element, and takes on a 2+ charge. The two atoms of the other element each form a 1− charge. As a result, the magnesium ion and the two ions of the other element

18. ## Math

Maya has 120 caramel apples to sell. Each caramel apple is covered with one topping. 1/5 of the caramel apples are covered with peanuts. 1/3 are covered with chocolate chips. 3/10 are covered with coconut. The rest are covered with sprinkles. How many

19. ## Biology

An animal cell that is surrounded by fresh water will burst because osmotic pressure causes... A. water to move into the cell B. water to move out of the cell C. solutes to move into the cell D. solutes to move out of the cell

20. ## Mechanical behavior

The television coverage of the World Series showed several remarkable slow-motion views of the deflection of the bat as it hit the ball. Major league wood baseball bats are made of ash. A typical major league bat has a length of 0.95m and a tapering

21. ## Math

1: Classify the quadrilateral using the name that best describes it I tried posting it but it didn't work 2: which statement is a true statement 3: which statement is a true statement 4: Which property is not a characteristic of a polygon 5: Which figure

22. ## chemistry

Examine the scenario. Chemical Reaction A and Chemical Reaction B involve the same two reactants. Chemical Reaction A is performed in a hot container, while Chemical Reaction B is performed in a cold container. Which of the answer choices correctly

23. ## psychology

Regarding eyewitness testimony, which of the following statements is TRUE? A. Most victims do not have an adequate weapon focus B. Victims certain of their testimony are usually more accurate C. Eyewitness testimony is generally very accurate D. Perception

24. ## algebra 1

Which of the following options results in a graph that shows exponential growth? a) f(x) = 0.4 (0.2) ^x b) f(x) = 4(0.98)^x c) f(x) = 0.7(5)^x d) f(x) = 5(4) ^-x I think it is c, can you please help?

25. ## Physics

In a series RCL circuit the generator is set to a frequency that is not the resonant frequency. This nonresonant frequency is such that the ratio of the inductive reactance to the capacitive reactance of the circuit is observed to be 4.91. The resonant

26. ## chemistry

For the reaction N2O4(g) ---> 2NO2(g) ,which of the following disturbances will cause an increase in NO2(g) concentration? 1. a decrease in temperature 2. removal of some N2O4(g) 3. need H for the reaction to predict 4. an increase in temperature 5. an

27. ## chemistry

Which way of dissolving does NOT change the chemical identity of the solute? disintegration dissociation ionization dispersion is it a?

28. ## chemistry

CaCl2(aq)+ NaHCO3(aq) =CO2(g)+ CaCO3(aq)+ NaCl(aq) +H2O(l) could some one explain to me how to balance the equation? please

29. ## stats

Question 5 of 10 Why are partial regression coefficients necessary in multiple regression? (Points : 1) Multiple variables each provide some of the same information. Each variable involved contributes a unique error component. Each variable involved is

30. ## Algebra

1. What is the shape of the bases for the following polyhedron? A. Triangle B. Square C.rectangle D. Circle 2. What is the best name for the given solid figure? A. Rectangular pyramid B.rectangular cone C. Rectangular prism D. Rectangle 3. How many lateral

31. ## chemistry

Examine the false statement. Weak acids always have a high pH. Select the rewording that makes the statement true strong acids always have a high pH weak acids always partially dissociate strong acids always have a low pH weak acids always fully dissociate

32. ## physics

The human lungs can function satisfactorily up to a limit where the pressure difference between the outside and inside of the lungs is 1/21 of an atmosphere. If a diver uses a snorkel for breathing, how far below the water can she swim? Assume the diver is

33. ## Math

A heated piece of metal cools according to the function c(x)=(.5)^(x−9), where x is measured in hours. A device is added that aids in cooling according to the function h(x)=−x−2. What will be the temperature of the metal after five hours? -7 Degrees

34. ## algebra

Determine if each root is a rational or irrational number. Explain your reasoning. √36 3√78

35. ## Math

A boat on a river traveled from City A to City C with a stop at City B. On the first part of the​ trip, the boat traveled at an average speed of 10 miles per hour. From City B to City C the average speed was 15 miles per hour. The entire trip covered 100

36. ## Language Arts

Which of the following words best describes Mr. Birkway? a. adoring b. enthusiastic c. unrealistic d. outgoing I think it's D. (This is based on the Novel Walk Two Moons.)

37. ## Easy Math

Draw a line with 3 distinct points on it. Label each with a different letter. How many different rays can you name using only three given points? a. 8 b. 6 c. 4 d. 2 Not quite sure. Could the answer possibly be four (c.)?

38. ## history

1. what impact did the education improvement act of 1984 have on south carolina a. South carolina teachers were paid the most in the southeast b. the state's schools were ranked the lowest in the nation c. fewer students took high school exit exams d. the

39. ## physics

A ballet student with her arms and a leg extended spins with an initial rotational speed of 0.90rev/s . As she draws her arms and leg in toward her body, her rotational inertia becomes 0.80 kg⋅m2 and her rotational velocity is 4.1rev/s . Determine her

Devon's target heart rate zone is 140bpm—177bpm. Julian's target heart rate zone is 148bpm—181bpm. They stop running and take their pulse, and both count the heart rate at 173bpm. If they decrease their heart rates by 20bpm, who will be in his THR

41. ## Physics

A student is reading a lecture written on a blackboard. The lenses in her eyes have a refractive power of 59.82 diopters, and the lens-to-retina distance is 1.686 cm. (a) How far is the blackboard from her eyes? (b) If the writing on the blackboard is 4.81

42. ## Math-geometry

. If a spherical Triangle on Earth has an excess of 30 degrees, find the area of this spherical triangle measured in square miles. b. If a spherical triangle on the moon has an excess of 30 degrees, find the area of this spherical triangle in sqare miles.

43. ## Calculus First Derivatives

If f(2) = 2.5 and f'(2) = -2.5, then f(2.5) is approximately... I have no idea how to do this without an equation.

44. ## physics

A ball player wishes to determine her pitching speed by throwing a ball horizontally from an elevation of 3.0 m above the ground. She sees the ball land 15 m down the range. What is the speed of the ball as it leaves her hand?

45. ## Math

Jason has already used 3 1/1 cans of paint painting furniture. He is painting chairs that use 8 1/1 cans of paint. Let the total cans of paint used be represented by p. Let the number of chairs painted be represented by c. An equation that represents this

46. ## English

roxie 1. Choose the answer that best matches the word in italics. Use context clues to determine the meaning of the word, if necessary. The decorations were reminiscent of autumn leaves. (1 point) leftovers made reminders symbolic 2. Choose the answer that

47. ## Physical Science

What is the density of a rectangular block that has a mass of 500g and a volume of 50cm3? what i came up with was 1000. i feel like im wrong though. can anyone please help me.

48. ## Mechanical Behavior of Materials

Determine the creep compliance J(t) of a material that responds like: a) an elastic spring with Young's modulus E J(t): b) a viscous dashpot with viscosity η as a function of time t) J(t): c) the Maxwell model (E for spring, and η for dashpot as a

49. ## Physics

A frisbee is thrown horizontally with a speed of 12 m/s. If the frisbee moves a horizontal distance of 15 m, how long will it stay in the air?

50. ## social studies

1. During the War of 1812, the Americans were fighting for a) self-government b) freedom of the seas c) freedom from England Answer is B 2. The Americans were most successful on a) sea b) Lake Champlain and Lake Erie c) on land Answer: B 3. The English

51. ## chemistry

Liquid nitrogen, which has a boiling point of 77 K, is commonly used to cool substances to low temperatures. How much energy must be removed from 1.4 kg of gaseous nitrogen at 77 K for it to completely liquefy? Assume the latent heat of liquid nitrogen is

52. ## chemistry

For the system H2(g) + CO2(g) H2O(g) + CO(g) at equilibrium, the addition of H2(g) would cause (according to LeChatelier’s principle) 1. more H2O(g) and CO(g) to form. 2. only more CO2(g) to form. 3. only more H2O(g) to form. 4. no change in amounts of

53. ## Chemestry @

A 27.6ml volume of chlorine gas is collected over water at 23 C and 750 torr. The mass of the gas is 78.4mg. The vapor pressure of water is 21 torr. a)what is the pressure of the chlorine gas? b) what volume does the chlorine gas occupy? c)How many moles

54. ## Trig

(Sec(theta)*sin(theta))/(tan(theta)+cot(theta))=sin^2(theta)

55. ## Math

A Parabola has a vertex (-3,7) and one x intercept is -11. Find the other x intercept and the y intercept. How on earth do i do this

56. ## science

which of the following is a chemical change a.boiling water b.melting a cube of ice c.dissolving 10 grams of salt in water d.splitting water into hydrogen and oxygen my answer: c

57. ## Science

If you scratch a penny with an steel file, will the copper of the penny rub off on the file, or the steel (iron) of the file rub off on the penny? 12. What can we determine from the above experiment about the relative hardness of copper and steel. 13. What

58. ## MATH

Sally is evaluating some test papers. There are 80 multiple choice questions in the test. Students get two points for every correct answer and for every wrong answer or any question left blank, one point is deducted from the total score. Mick got 115

59. ## chemistry

Where does radioactivity come from? physical changes in atoms the nuclei of unstable isotopes chemical reaction the breaking of chemical bonds please help

60. ## chemistry

Lists how many valence electrons are shared, gained, or lost by each atom of the 6 compounds? N2 CCl4 SiO2 AlCl3 CaCl2 LiBr

61. ## Math

I don't understand this. on a blueprint, the length of a wall is 5 centimeters. if the actual length of the wall is 15 feet, what is the scale of the blueprint?

62. ## Math

Find the complement and supplement of the angle shown. The picture is of an acute angle that is measured 52 degrees. How am I supposed to find the complement and supplement of the angle? Please help.

63. ## algebra

the width of a poster board is 30 inches. using scissors you reduce the width of the poster board to 10 inches what is the scale factor of the dilation? a. 1/3 b. 1/10 c. 3 d.10

64. ## Physics- Circuits

In a series RCL circuit the generator is set to a frequency that is not the resonant frequency. This nonresonant frequency is such that the ratio of the inductive reactance to the capacitive reactance of the circuit is observed to be 5.53. The resonant

65. ## PHYSICS

Two wires have the same cross-sectional area and are joined end to end to form a single wire. The first wire has a temperature coefficient of resistivity of α1 =0.00603 (C°)-1 and a resistivity of 5.00 x 10-7Ω m. For the second, the temperature

66. ## Math - logs

the log(10^ -1)of 3.66 = of 9.86 = of -2.8 = please help. (the 10^-1 is the subscript to log)

67. ## Physics

When a driver brakes an automobile, the friction between the brake drums and the brake shoes converts the car's kinetic energy to thermal energy. If a 1750-kg automobile traveling at 28 m/s comes to a halt, how much does the temperature rise in each of the

68. ## physics/optics

Transpose the prescription -0.75DS/-3.25DCx30 to the toric form with a capstan-form surface which has a +2.50D base curve

69. ## chemistry!

What volume of solvent should be added to 36.8 g of CH3OH to produce a 0.500 M solution of CH3OH?

70. ## chemistry

In the reversible reaction in water solution NH3 + H2O NH4+ + OH− , what acts as a Bronsted-Lowry acid and what acts as a Bronsted-Lowry base? 1. H2O; NH4+ 2. H2O; OH− 3. OH−; NH4+ 4. NH3; H2O 5. OH−; H2O

71. ## Math

Solve the equation by the substition method. x-y=11 3x+10y=-6?

72. ## Physics

A Chinook (King) salmon (Genus Oncorynchus) can jump out of water with a speed of 6.75 m/s. If the salmon is in a stream with water speed equal to 1.65 m/s, how high in the air can the fish jump if it leaves the water traveling vertically upwards relative

73. ## Math

The dimensions of a pyramid are increased by 1100%. The percentage increase in surface area is The new dimensions are ___times the original dimensions, and the new surface area is ___times the original surface area. The increase in surface area is___%.

74. ## Biology

Which of the following lists structures from smallest to largest? A. Chromosome, supercoil, coil, nucleosome, double helix B. Chromosome, coil, double helix, nucleosome, supercoil C. Double helix, nucleosome, coil, super coil, chromosome D. Nucleosome,

75. ## chemistry

Which of the solvents will be most effective at dissolving a nonpolar gas like methane? water, a polar solvent solid mercury hexane, a nonpolar solvent solid copper is it a?

76. ## chemistry

How does the saturation of a solution affect crystal formation?

77. ## chemistry

Which of the following solvents would most effectively dissolve a nonpolar gas like methane? a polar solvent at 10°C a polar solvent at 35°C a nonpolar solvent at 35°C a nonpolar solvent at 10°C is it a?

78. ## social studies

What is a reason that market prices are not always the same as equilibrium prices? A) Market prices are often set by buyers rather than by sellers. B) Supply and demand are not well-understood by business owners. C) The equilibrium is not always the most

79. ## science

The work of which scientist(s) helped to explain light's ability to propagate through a vacuum? A. Maxwell ==B. Davisson and Germer C. Fresnel, Fraunhofer, and Arago D. Newton An object that has a height of 0.4 meter is placed at a distance of 0.7 meter

80. ## english

Which of the following sentences contains an action verb? 1)Brad looks upset today. 2)Brad drove to the zoo with us.+++ 3)The animals seem very active today. 4)Our friend appeals happy now. I think it is number 2?

81. ## Chemistry

The iodine-131 nuclide has a half-life of 8 days. If you originally have 625-g sample, how many grams will you have after 2 months(approximately 64 days)?

82. ## Chemistry

The cesium-131 nuclide has a half life of 30 years. After 90 years, about 6g remain. What is the original mass of the cesium-131 sample?

83. ## Geography

which of the following was a belief of the quakers that set them apart from ither religious groups that settled in the american colonies? A. Quakers believed that all people are equal in God's eyes B. Quakers believed in freedom of religion C. Quakers

84. ## Math

If an object is propelled upward fom a height of s feet at an initial velocity of v feet per​ second, then its height h after t seconds is given by the equation he=−16t squared + vt + ​s, where h is in feet. If the object is propelled from a height

85. ## math PsyDAG

write the result in scientific notation (1.1 * 10^-5)(3 * 10^-2) a. 4.1 *10^-7 b. 4.1 *10^10** c. 3.3 *10^-7 d. 3.3 *10^10

86. ## History

Which of these indicated that the Tang Dynasty had lost the Mandate of Heaven? a. military defeats, rebellions, and economic troubles b. earthquakes, economic troubles, and isolationism c. rebellions, mass migrations, and military dictators

87. ## History

Which pair of ancient civilizations were ruled by dynasties? a. China and Egypt b. China and the Indus Valley c. the Indus River Valley and Mesopotamia d. Egypt and Mesopotamia I'm pretty sure its a.

88. ## math

In a jar there are 4 red marbles 5 green marbles and 7 blue marbles. 1 what us the probability of selecting a red marble replacing it and then selecting a blue marble 2 What is the probability of selecting a red marble setting it aside and then selecting a

89. ## Mechanical behavior

An atomic force microscope cantilever, of rectangular cross section, has a length, l, of 200μm, a width, b, of 20μm and a depth, h, of 1μm. It is made of silicon nitride, which has a Young's modulus, E, of 300GPa. What is the maximum force that can be

90. ## English

What sentences are compound or complex? 1.He, passionate, studious, austere, and having already a bride in his Art; she a maiden of rarest beauty, and not more lovely than full of glee; all light and smiles, and frolicsome as the young fawn; loving and

91. ## Geometry

How to put each circle in standard form? 1. Center of the line 5x-3y=12 and tangent to both axes.(first quadrant circle only). 2.passes through (-3,22) and tangent to the y axis at (0,19) 3.diameter ab with a (4,10) and b (8,14) 4. Center (6,10) tangent to

92. ## art

1. during which time period were artists keenly interested in using the golden ratio in their paintings a.Baroque period b.oriental period c.futuristic period d.renaissance period 2. what is the best definition for the term visual composition a. a

93. ## Physics

1.) A tennis ball (mass = 57 grams) is held directly above a basketball (mass = 624 grams)that is held 4.7 meters off the ground. Both are dropped simultaneously. Assuming an elastic collision, how high above the ground does the tennis ball reach after

94. ## Science

Put the following in the correct order. Report results Determine if hypothesis is true Do background research Construct a hypothesis Collect data Analyze results and draw conclusions Design and implement an experiment State the problem / ask questions

95. ## PHYSICS 2

Near San Francisco, where the vertically downward component of the earth's magnetic field is 6.8 x 10-5 T, a car is traveling forward at 17 m/s. The width of the car is 2.1 m. Find the emf induced between the two sides of the car. If positive charge

96. ## geometry

distint points a, b, c, d, e, and f are marked on a circle. How many triangles can be formed using these points as vertices?

97. ## Science

Well water in karst areas is often very hard. What is the role of chemical weathering in producing hard water in aquifers?

98. ## Math

Solve the equation by the substition method. x-y=11 3x+10y=-6?