# Questions Asked onFebruary 26, 2012

1. ## math

Please someone show me how to work this one out? Suppose Caroline is a cinephile and buys only movie tickets. Caroline deposits \$3000 in a bank acct that pays an annual interest rate of 20%. You can assume that this interest rate is fixed-that is, it

2. ## calculus

1. If 3x^2+2xy+y2=2 then the value of dy/dx x = 1 is A. -2 B. 0 C. 2 D. 4 E. not defined

3. ## calculus

4. When the area in square units of an expanding circle is increasing twice as fast as its radius in linear units, the radius is A. 1/4pi B.1/4 C.1/pi D. 1 E.pi

4. ## calculus

3. For what value of k will x+k/x have a relative maximum at x = -2? A. -4 B. -2 C. 2 D. 4 E. None of these

5. ## Chemistry

A solution in which [H+] is 1000 times greater than [OH-] [OH-] = ?M

6. ## Collision in One Dimension

After skiding down a snow-covered hill on an inner tube, Ashley is coasting across a level snowfield at a constant velocity of +2.2 m/s. Miranda runs after her at a velocity of +4.5 m/s and hops on the inner tube. How fast do the two of them slide across

7. ## Chemistry

Find the pH of mixture of acids. 0.185 M in HCHO2 and 0.225 M in HC2H3O2 Im using an ice chart of weak acid and putting in strong acid in H+ initiAL concentration. I've done the problems many different ways but cannot seem to get the right answer help

8. ## Physics

A boy whose mass is 40kg runs up a flight of 30 steps each 150mm high in 6seconds. Find the average power developed (take g as 10m/s^2.

9. ## Chemistry

The equilibrium constant for the reaction: 2NO(g)+Br2(g)2NOBr(g) Kc=1.3x10^-2 at 1000 Kelvin Calculate Kc for: NOBr(g)NO(g)+ 1/2Br2(g)

10. ## Calculus 3

A ball is thrown at an angle of 45 degrees to the ground. If the ball lands 90m away, what is the initial speed of the ball? I know you use x(t)=(v*cos(alpha))t and y(t)=(v*sin(alpha))t-g/2t^2 but I'm still really confused about what to do. Please show all

A 3.00 kg stone is tied to a thin, light wire wrapped around the outer edge of the uniform 8.00 kg cylindrical pulley. The inner diameter of the pulley is 60.0 cm, while the outer diameter is 1.00 m. The system is released from rest, and there is no

12. ## Chemistry

Which type of bond is formed between two chlorine atoms in a chlorine molecule? 1) polar covalent 2) nonpolar covalent 3) metallic 4) ionic

13. ## chemistry

what isw the density of N2O,a gas at STP?

14. ## Chemisty

Photographic film contains silver bromide in gelatin. Once exposed, some of the silver bromide decomposes, producing fine grains of silver. The unexposed silver bromide is removed by treating the film with sodium thiosulfate. Soluble sodium silver

15. ## 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

16. ## homework college chem.

a sample of gas occupies a volume at 73. 1 mL. As it expands, it does 135.0 J of work on its surroundings at a constant pressure of 783 torr. what is the final volume of gas?

17. ## Physics 12

A block mass m1 lying on a frictionless inclined plane is connected to a mass m2 by a massless cord passing over a pulley. 1.) determine a formula for the acceleration of the system in terms of m1, m2, Ө, and g. 2.)what conditions apply to mass m1 and m2

18. ## chemistry

Give the formula for the conjugate base of each acid. a. HSO4- H2SO4- b. H3PO4 H4PO4 c. HPO42- H2PO42- d. HNO3 H2NO3

19. ## math

Rental cost for offices spaces have been going up at 6.2% per year compounded annually for the past 5 years. If office space rent is now \$32 per square foot per month, what were the rental rates 5 years ago

20. ## Math

A student opened her math book and computed the sum of the numbers on two pages. Then, she turned to the next page and computed the sum of the numbers on those two facing pages. Finally, she computed the product of the two sums, and her calculator

21. ## chemistry

You mix 55 mL of 1.00 M silver nitrate with 25 mL of 0.81 M sodium chloride. What mass of silver chloride should you form?

22. ## Help --->Chemistry

1) Complete and balance the following chemical reactins: 2HCI(aq)+Pb(NO3)2(aq)---> 2HI(aq)+K2SO3(s)---> Pb(NO3)2(aq)+2KCI(aq)---> Ba(NO3)2(aq)+Na2SO4(aq)---> K2CO3(aq)+Ba(NO3)2(aq)---> HCI(aq)+AgNO3(aq)---> 2) How could you separate gold from a mixture of

23. ## chemistry

calculate the pH of 20.00mL of 2.00 M HCl diluted to 0.500 L

24. ## Chemistry

The value of Kw increases with increasing temperature. Is the autoionization of water endothermic or exothermic? In thinking its both but I don't know how to explain it.hmm...

25. ## chemistry

In the reaction below: Increasing the concentration of Cl2 will _____ at equilibrium. HAVE NO EFFECT

26. ## trig

Solve for x if sin2x=cos(x+60 and x€ [-90,180].show all work details

27. ## Geometry

20. The wheelchair ramp at the entrance of the Mission Bay Library has a slope of 1/18. What angle does the ramp make with the sidewalk? Round to the nearest degree.

28. ## Physics

A body of mass 20g appears to have a mass of 13g in oil and 12g in water what is the relative density of oil.

29. ## physics

you are standing in a canyon. you shout and hear an echo 2 seconds later. what can you tell me about the width of the canyon?

30. ## calculus

Consider the curve defined by 2y^3+6X^2(y)- 12x^2 +6y=1 . a. Show that dy/dx= (4x-2xy)/(x^2+y^2+1) b. Write an equation of each horizontal tangent line to the curve. c. The line through the origin with slope -1 is tangent to the curve at point P. Find the

31. ## economics

Suppose Caroline is a cinephile and buys only movie tickets. Caroline deposits \$3000 in a bank acct that pays an annual interest rate of 20%. You can assume that this interest rate is fixed-that is, it won’t change over time. At the time of her deposit,

32. ## physics

A winch is used to drag a 375 N crate up a ramp at a constant speed of 75 cm/s by means of a rope that pulls parallel to the surface of the ramp. The rope slopes upward at 33 degreesabove the horizontal, and the coefficient of kinetic friction between the

33. ## Geometry

38. For maximum accessibility, a wheelchair ramp should have a slope between 1/16 and 1/20. What is the range of angle measures that a ramp should make with a horizontal line? Round to the nearest degree.

34. ## math

When 6-year old Melanie arrived home from school, she was the first to eat cookies from a freshly baked batch. When 8-year old Felipe arrived home, he ate twice as many cookies as Melanie had eaten. When 9-year old Hillary arrived home, she ate 3 fewer

35. ## running.from.myself

3. how many lines of symmetry are in a 8-sided snowflake? 10, 12, 8, 16 1. how many lines of symmetry are in a 6-sided snowflake? 10, 11, 12, or 6 if you wanted to make hearts on your snowflake,, which sides of the right triangle would you have to draw

36. ## Math

A restaurant owner has a luncheon special that consists of a cup of soup, half of a sandwich, and a beverage. She wants to advertise that a different luncheon of three items can be purchased 365 days of the year for \$4.99 apiece. If she has 7 different

37. ## Physics

A spring is mounted horizontally. A crate which has a mass of 8.5kg is pressed against the spring with a force of 350N. As a result the spring is compressed a distance of 82.0cm. The mass is then released and is allowed to slide along the horizontal,

38. ## Chemistry

Find the pH of mixture of acids. 0.185 M in HCHO2 and 0.225 M in HC2H3O2 Im using an ice chart of weak acid and putting in strong acid in H+ initiAL concentration. I've done the problems many different ways but cannot seem to get the right answer help

39. ## physics/calculus 3

A ball is thrown at an angle of 45 degrees to the ground. If the ball lands 90 m away, what is the initial speed of the ball?

40. ## chemistry

Give the formula for the conjugate base of each acid. a. HSO4- SO4^2- b. H3PO4 H3PO4 c. HPO42- PO4^2- d. HNO3 NO3^-

41. ## Physics

A football kicked with an initial speed of 23.1m/s reaches a maximum height of 16.9m. At what angle was the ball kicked? What are the steps to solving this problem?

42. ## Physics

A boy whose mass is 40kg runs up a flight of 30 steps each 150mm high in 6seconds. Find the average power developed (take g as 10m/s^2).

43. ## chemistry

How many milliliters of a 5.0 M H2SO4 stock solution would you need to prepare 132.0 mL of 0.21 M H2SO4?

44. ## Chemistry

How many grams of PI3 could actually be produced from 250 g of I2 and excess phosphorous if the reaction gives a 98.5% yield? P4 + 6I2 --> 4PI3

45. ## Physics

A husband and Wife take turns pulling their child in a wagon along a horizontal sidewalk. Each exerts a constant force and pulls the wagon through the same displacement. They do the same amount of work, but the husband's pulling force is directed 58

46. ## english

romeo and Juliet Act 1 scene 3 questions: 1. what impression does the audience get of Juliet in this scene? 2.what impression does the audience get of Juliet's nurse on this scene? 3.Explain the extended metaphor used by Lady Capulet (lines 80-95) what is

I have to calculate the concentration of I2 produced (# of moles of I2 produced / L) based on the stoichiometric ratio in the following equation. 2S2O3^2- + I2 -> 2I^- + S4O6^2- Would the # produced be 2 for I2. I am not sure what to use for L?

48. ## economics

If a farmer purchases a new tractor,is it included in the calculating of the GDP?

49. ## physics

A negatively charged balloon has 4.5 µC of charge. How many excess electrons are on this balloon? Answer in units of electrons

50. ## Physics

A solid rectangular block measure 0.100*0.080m*0.060m and floats freely in a liquid of density 1354kg/m^2 if the depth of liquid 0.04m up the block largest side. Find the density of the block.

A particle is travelling with velocity (4i+5j)m/s. It undergoes an acceleration of magnitude 2.5m/s^2 in a direction given by the vector (3i-4j). Find the velocity and displacement of the particle from its initial position after 4s.

52. ## Finance

Determine how much you would be willing to pay for a bond that pays \$60 annual interest indefinitely and never matures (i.e., a perpetuity), assuming you require an 8% rate of return on this investment.

53. ## chemistry

what is Kc for 2NOBr-->2NO+Br2 when the temperature is 1000K and the Kc is 1.3x10^-2

54. ## chemistry

Calculate pH for strong base solution: 15.0 mL of 1.20×10^−2 M Ca(OH)2 diluted to 460.0 mL

55. ## Physics

A ball of mass 8kg falls from rest from a height of 100m neglecting air resistance. Calculate its kinetic energy after falling a distance of 30m(take g=10m/s^2).

56. ## chemistry

A mixture formed by adding 55.0 mL of a 1.5x10^-2 M HCl to 140 mL of 1.0x10^-2 M HI. How do you calculate the pH for this problem?

57. ## chemistry

What is the mole fraction of NaOH in an aqueous solution that contains 20.5% NaOH by mass?

58. ## Accounting

In its first month of operations, Cisler Company made three purchases of merchandise in the following sequence: (1) 300 units at \$6, (2) 400 units at \$8, and (3) 500 units at \$9. Assuming there are 200 units on hand at the end of the period, compute the

59. ## physics

How long will it take a motor 1500 watt motor to lift a 500kg elevator 30 meters? Give your answer in minutes.

60. ## physics

A small cork with an excess charge of +7.0 µC is placed 0.16 m from another cork, which carries a charge of −3.2 µC. What is the magnitude of the electric force between the corks? The Coulomb constant is 8.98755 × 10 9 N · m2 /C 2 . Answer in units

61. ## Physics

A mass m1 on a horizontal shelf is attached by a thin string that passes over a frictionless pulley to a 2.5 kg mass (m2) that hangs over the side of the shelf 1.2 m above the ground. The system is released from rest at t = 0 and the 2.5 kg mass strikes

62. ## Physics

The string of a conical pendulum is 54.5 cm long and the mass of the bob is 0.22 kg. a) Find the angle between the string and the horizontal when the tension in the string is three times the weight of the bob. b)Under those conditions, what is the period

63. ## physics

A steroid is moving along a straight line. A force acts along the displacement of the asteroid and slows it down. The asteroid has a mass of 4.5e4kg and the force causes the speed to change from 7100 to 5500m/s. (A) What is the work done by the force? (B)

64. ## calculus

5. A particle moves along the y – axis with velocity given by v(t)=tsine(t^2) for t>=0 . a. In which direction (up or down) is the particle moving at time t = 1.5? Why? b. Find the acceleration of the particle at time t= 1.5. Is the velocity of the

65. ## Heat Transfer

Derive the general heat conduction equation in cylindrical coordinates by applying the first law to the volume element.

66. ## algebra

An airplane flying with the wind can cover a certain distance in a = 3 hours. The return trip against the wind takes b = 4.5 hours. How fast is the plane and what is the speed of the wind, if the one-way distance is c = 720 miles?

67. ## Comunity school

When using fraction strips, how do you know that two fractions are equivalent?

68. ## calculus

Consider a differentiable functionf having domain all positive real numbers, and for which it is known that f'(x)=(4-x)^-3 for x.0 a. find the x-coordinate of the critical point f. DEtermine whether the point is a relative maximum or minomum, or neither

69. ## physics

A uniform ladder 10.0 m long is leaning against a frictionless wall at an angle of 60.0° above the horizontal. The weight of the ladder is 21.8 lb. A 57.8-lb boy climbs 4.38 m up the ladder. What is the magnitude of the frictional force exerted on the

70. ## Chemistry

The degree of polarity of a bond is indicated by 1) ionization energy difference 2) the shape of the molecule 3) electronegativity difference 4) the charge on the kernel

71. ## math

A 4 ft spring measures 8 ft long after a mass weighing 8 pounds is attached to it. the medium through which the mass moves offers a damping force numerically equal to sqrt.2 times the instantaneous velocity. Find the equation of motion if the mass is

72. ## PHYSICS

a 1500kg sports car accelerates from 0 to 30 m/s in 8 seconds. Whaat is the power of its engine? Please help

73. ## physics

A puck of mass 5.0 kg moving at 16.5 m/s approaches an identical puck that is stationary on frictionless ice. After the collision, the first puck leaves with a speed v1 at 30º to the orginal line of motion. The second puck leaves with speed v2 at 60º.

74. ## homework help please! chemistry 111

the specific heat of a certain type of metal is 0.128 J(grams per Celsius). What is the final temperature if 305J of heat is added to 74.8g of this metal initially at 20.0 degrees Celsius?

75. ## phys2

A 2.9-kg block is released from rest and allowed to slide down a frictionless surface and into a spring. The far end of the spring is attached to a wall, as shown. The initial height of the block is 0.34 m above the lowest part of the slide and the spring

76. ## Physics

Suppose that when you ride on your 7.90-kg bike the weight of you and the bike is supported equally by the two tires. If the gauge pressure in the tires is 72.5 lb/in2 and the area of contact between each tire and the road is 7.13 cm2, what is your weight?

77. ## Conservation if Linear Momentum

A student (m = 66 kg) falls freely from rest and strikes the ground. During the collision with the ground, he comes to rest in a time of 0.04 s. The average force exerted on him by the ground is +18000 N, where the upward direction is taken to be the

78. ## Chemistry

50g of H2SO4 produce how many grams of H2?

79. ## Physics Help!!!

A pitcher throws a 0.111-kg baseball, and it approaches the bat at a speed of 37.4 m/s. The bat does 78.6 J of work on the ball in hitting it. Ignoring air resistance, determine the speed of the ball after the ball leaves the bat and is 30.8 m above the

80. ## physics

A line of charge with a uniform density of 36.3 nC/m lies along the line y = -14.8 cm, between the points with coordinates x = 0 and x = 44.9 cm. Calculate the electric field it creates at the origin. Enter first the x- and then the y-component.

81. ## college chemistry

A solution is made by adding 0.100 mole of ethyl ether to 0.841 mole of ethyl alcohol. If the vapor pressure of ethyl ether and ethyl alcohol at 20oC are 375 torr and 20.0 torr, respectively, the vapor pressure of the solution at 20oC (assuming ideal

82. ## Science

What is a process that could cause an unconformity?

83. ## arithmetic

An arithmetic n geometric sequence have the same first term 2.with the 2nd term x. the sum of the 3rd term of the AS is equal to the 3rd term of the GS. Give the first 3 terms of both sequences.

84. ## Finance

A firm has \$3 million market value and it sells preferred stock with a par value of \$100. If the coupon rate on the preferred stock is 9% and the preferred stock trades at \$95, what is the cost of preferred stock financing?

85. ## physics

A puck of mass 5.0 kg moving at 16.5 m/s approaches an identical puck that is stationary on frictionless ice. After the collision, the first puck leaves with a speed v1 at 30º to the orginal line of motion. The second puck leaves with speed v2 at 60º.

86. ## chemistry 111

in calibrating your thermometer by setting only the freezing and boiling points, what assumptions are you making regarding the internal diameter of the thermometer and the expansion of the thermometer fluid?

87. ## 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

88. ## earth-physics

The Earth has an angular speed of 7.272 10-5 rad/s in its rotation. Find the new angular speed if an asteroid (m = 1.07 1022 kg) hits the Earth while traveling at a speed of 1.30 103 m/s (assume the asteroid is a point mass compared to the radius of the

89. ## physics

The frequency of oscillation of the wave emitted by an FM radio station is 80.9 MHz. Find the period of vibration. Radio waves travel at a speed of light; 3 × 10 8 m/s. Answer in units of ns 002 (part 2 of 2) Find the wavelength. Answer in units of m

90. ## chemistry

4KCl + 4HNO3 + O2 ==> 4KNO3 + 2Cl2 + 2H2O what kind of reaction is this?

91. ## math

57 Cds in 8 organizers drawpicturesto tell how many are in each group and how many are left over.

92. ## Finance

2. You are now considering adding a corporate bond to your investment portfolio. The bond was issued last year to have 10 years to maturity (so it has 9 years remaining to maturity from today) The bond has an 8% coupon, and was sold at par (\$1,000) when it

93. ## nonfiction

why was the nile so valuable for trade and transportation

94. ## Physics

An object of volume 4cm^3 is totally immersed in liquid of density 1030kg/m^3. Calculate the upthrust of liquid on the object.

95. ## Chemistry

If very small concentrations of NaCl and AgNO3 are mixed, no precipitate forms. However, if large concentrations are mixed, a white precipitate forms. Can someone tell me a method for testing the hypothesis that "insoluble" salts would dissolve to some

96. ## chemistry

Which is the conjugate base of the bicarbonate ion, HCO3-? CO3 2-

97. ## physics

Calculate the net charge on a substance consisting of a combination of 8.9 × 10 13 protons and 4.4 × 10 13 electrons. Answer in units of C

98. ## statistics

12. A statistics student received a grade of 85 on a statistics midterm. If the corresponding z score equaled +1.50, and the standard deviation equaled 7, what was the average grade on this exam? a. 95.5 b. 74.5 c. 78.0 d. Cannot determine without knowing

99. ## Chemistry

These are what i used. 0.0375M sodium thiosulphate , 2.5% KI .47.2 ml copper sulphate solution. the average volume of Na2S2O3 is 19.25 cm, i have already calculated the number of moles of thiosulphate which is 7.218 * 10-4 moles of Na2S2O3 and also the

100. ## phys4

A hang glider moving at speed 9.0 m/s dives to an altitude 4.2 m lower. Ignoring drag, how fast is it then moving?

101. ## physics

A block of mass M = 6.755 kg is pulled along a horizontal frictionless surface by a rope of mass m = 0.592 kg, as shown in Fig. 5-63. A horizontal force = 41.5 N is applied to one end of the rope. Assume that the rope only sags a negligible amount. Find

102. ## chemistry

if the activation energy for a given compound is found to be 10 kJ/mol, with a frequency factor of 4.0x10^13 s-1, what is the rate constant for this reaction at 398K?

103. ## Communication

The perception process involves three parts: listening, absorbing, and reacting. False A child growing up on a deserted island would have no self-concept. False How you look at the world depends on what you think of yourself; and what you think of yourself

104. ## math

Associated press Online provided information from a fiscal analyst stating that during the past 20 years, the average after-tax income of the wealthiest 1% of Americans had grown from \$263,700 to \$677,900. What is the percent increase? Round to the nearest

1) The decomposition of hydrogen peroxide in solution and in the presence of iodide ion was studied in laboratory, and the following mechanism proposed based on the experimental data. H2O2 + I - = H2O + IO - (slow) H2O2 + IO - = H2O + O2 + I - (fast) Which

106. ## Geometry

If Gina cleans her room, then she will go to the mall. Which of these is logically equivalent to the given statement? Answer A. If Gina did not go to the mall, then she did not clean her room. B. If Gina did not go to the mall, then she cleaned her room.

107. ## calculus

Find the area between the graph of f and the x-axis over the interval [−4, 1] when f(x) = 4 + 4x. 1. Area = 34 sq. units 2. Area = 30 sq. units 3. Area = 28 sq. units 4. Area = 32 sq. units 5. Area = 26 sq. units

108. ## pre-calc

Given sin x = -5/6 and x is in Quadrant IV, find cos 2x (1 point)

109. ## trig

sin [sin -1 (7/25) - cos -1 (-8/17)]

110. ## Physics

A wooden cube of side 5cm floats in water 200cm^2 of its depth below the water surface and ats sides are vertical calculate the density of the wood in g/cm^3.(1) Density of water in 1g(m^-3).

111. ## physics

a 1500kg sports car accelerates from 0 to 30 m/s in 8 seconds. Whaat is the power of its engine? Please help power= work/time= 1/2 m v^2/8 1/2(1500k)(30)^2 2/8 =168750 is this correct?

112. ## world history

In what ways did geography and climates affect the development of human society?

113. ## math

Gemma is making necklaces. She needs 10 beads for each one. She has 64 beads altogether. how many necklaces can she make?

114. ## algebra. help!!

my answer is 63.56. i don't know if its right answer. here this problem: It takes Scott an average of 45 min to prune 1 tree. Victor takes 65 min to prune a tree on average. The Scott-Victor Pruning Service has the contract to prune 92 trees in Flagstaﬀ,

115. ## physics

A river is moving at 4.0 m/s [s] , and a swimmer swims across it at 1.4 m/s [e] relative to the water. What is the swimmers velocity measure with respect to the river bank

116. ## physics

A river is moving at 4.0 m/s [s] , and a swimmer swims across it at 1.4 m/s [e] relative to the water. What is the swimmers velocity measure with respect to the river bank

117. ## Calculus

A right triangle with hypotenuse y and equal legs of size x has a perimeter of 36m. Express the area of the triangle solely in terms of the hypotenuse y.

118. ## statistics

In this unit we have worked with scores and their locations within a distribution. This discussion is designed to get you to think a little more about distributions of scores. Shown below are two samples of scores. Input these scores into SPSS and use

119. ## Chemistry

I had to perform an experiment for rate of reaction. The point of the experiment was to show how changes in reactant concentration, temperature, and catalyst presence can affect the rate of a reaction. The reaction that we studied was H2O2 + 2I^- + 2H^+ ->

120. ## algebra. help!!

6 hour have to change to minute. i hate words problem. so here the problem: Two candles are the same length. One candle takes 6 hours to burn all the way down while the other candle takes 9 hours. If the two candles are lit at the same time, how long will

121. ## Physics

Calculate the electric field at a point 3.12 cm perpendicular to the midpoint of a 2.23 m long thin wire carrying a total charge of 5.45 uC.

122. ## PED 212

Using the databases listed within the Ashford Online Library you will evaluate a research-based article from a peer reviewed journal. Your critique must be grammatically correct, properly cited, and utilize APA style of writing. Choose one of the following

123. ## Math

Ted put several different integers in order from least to greatest. He then put the same integers in order from greatest to least. Both times the same number was third in order. Explain how this is possible.

124. ## Chemistry

25.0 ml of a 0.100 M solution of the weak acid, CH3OOH is titrated with a 0.10 M solution of the strong base, NaOH. Calculate the pH of the equivalence point.

125. ## chemistry

Potassium nitrate is made by adding potassium chloride to hydrogen nitrate in the presence of oxygen gas. Along with the potassium nitrate, chlorine and water are produced. How would write the equation?

126. ## physics

The drawing shows a skateboarder moving at 5.34 m/s along a horizontal section of a track that is slanted upward by 47.7 ° above the horizontal at its end, which is 0.795 m above the ground. When she leaves the track, she follows the characteristic path

127. ## Math

Verify the identities by transforming the left-hand side into the right-hand side. Show work. (tan^2X)/(1-cos^2x)= sec^2x HELP

128. ## chemistry

Water is amphoteric (can act as an acid or a base). a. Complete the chemical equation that shows water acting as a base. H2O + HCl ⇋ Cl- + H3O+ b. In this reaction, what is the conjugate acid of water? H3O+

129. ## Math

There are four people that want to cross a bridge. Sam can cross in 1 minute, Joe can cross in 2, Jack can cross in 5, and Steve can cross in 10. They have one flashlight, and two can cross at a time, but they must go at the same pace. So if Steve and Sam

130. ## Calculus

1. I really don't understand what this problem is asking for The population P(t) of fish in a lake satisfies the logistic differential equation dP/dt = 3P - (P^2)/6000 If P(0) = 4000, what is ? Is the solution increasing or decreasing? && how would you

131. ## Math

Ted put several different integers in order from least to greatest. He then put the same integers in order from greatest to least. Both times the same number was third in order. Explain how this is possible.

132. ## Physics

The speed of sound is about 340 m/s. Assume that when the motion detector emits an ultrasonic pulse, it must detect the reflected pulse before it can emit its next pulse. Assuming that the length of the air track is about 2 meters, what is the maximum

133. ## Finite Math

Working on this for a couple of hours, any help? Input -output matrix F S C F .1 0 .2 S .2 .1 .4 C 0 0 .1 F= Food S=Shelter C=Clothing x=(I-A)^-1(D) 1)What should the total production of the three industries be to generate a \$900,000 surplus each? I gotthe

134. ## Math

What is the range of 100, 95, 88, 0, and 87?

135. ## Math

At the beginning of the week, an electronics store took count of how many tvs and radios there were in the stockroom. The manager found that there was a ratio of 3 tvs for every 2 radios. At the end of the week, the manager counted 24 boxes left in the

136. ## physics

A 1093 kg van, stopped at a traffic light, is hit directly in the rear by a 715 kg car traveling with a velocity of +2.38 m/s. Assume that the transmission of the van is in neutral, the brakes are not being applied, and the collision is elastic. What is

137. ## physics

A 750.0 N man, carrying a 1.9 kg physics textbook, stands at the center of a frozen pond of radius 9.0 m. He is unable to get to the other side because of a lack of friction between his shoes and the ice. To overcome his difficulty, he throws his textbook

138. ## physics

Calculate the work required to lift a 20kg object from the floor to a height of 2 meters. Give your answer in Joules

139. ## Math/Trig

Period: Asymptotes: Range: a) y= 2 sec (x) + 1 b) y= -2 csc (x - pi/2) c) y= 1 + tan (x + pi/4) d) y= 1/2 + csc (x - pi) + 1 e) y= cot (3x + pi) + 2 Any tips on drawing the graph?

140. ## Math

Bhu had \$48, but received \$100 as a birthday gift and used the money to pay off her debt. She spent half of the money on a gift for herself. Which expression BEST represents the number of dollars Bhu has left? a.(-48+100)÷2 b.(48+100)÷2 c.-48+100÷2

141. ## chemistry

An aqueous salt solution is formed by adding 11.67 g sodium sulfate (solute) to water (solvent). What mass (in g) of water is used if the freezing point of the solution is -12.9 oF. Kf H2O = 1.86 oC/m I know to use delta T= i*Kf*m I then solve for m. But,

142. ## math

Each lettter in the word UTICA was written on a slip of paper.One slip of paper was chosen without looking. Vowels are the letters A,E,I,O and U.What is the probability that the letter written on the chosen slip of paper was a vowel?

143. ## math

A homeowner wants to plant a garden in his backyard. He decides to have 375 square feet garden and wants the garden to be 10 feet longer than it is wide. Find the dimensions of the garden.

144. ## science

why don't hydrocarbons have hydrogen bonding?

145. ## stats

. Each week during the first half of the semester, a sample of 50 students was polled to determine how many of them had their homework done before class. The following arc the results of the weekly polls: Week # # of students with homework done 1 1 2 8 3

146. ## Physics

A 1.00e2kg crate is being pushed across a horizontal floor by a force of P that makes an angle of 30.0 degrees below the horizontal. The coefficient of Kinetic Friction is 0.200. What should be the magnitude of P, So that the network done by it and the

147. ## Geometry

Statement 1: “If she is stuck in traffic, then she is late.” Statement 2: “If she is late, then she is stuck in traffic.” Statement 3: “If she is not late, then she is not stuck in traffic.” Meg writes, “Statement 3 is the inverse of

148. ## nonfiction

why did the egyptians embalm bodies

149. ## geometry

In parallelogram TRIG, m∠R = 2x + 19 and m∠G = 4x - 17. What is m∠T

An object is moving in a plane. At time t =0,it is at origin O, and moving with velocity u. After 2 seconds, it is at A, where OA = -2i - 4j. After 3 seconds, it is at B, where AB= 10i -40 j. Show that this is consistent with constant acceleration a. Find

151. ## chemistry

4KCl + 4HNO3 + O2 ==> 4KNO3 + 2Cl2 + 2H2O I meant from * combustion decomposition synthesis single replacement double replacement

152. ## physic

A rowboat crosses a river with a velocity of 3.42 mi/h at an angle 62.5° north of west relative to the water. The river is 0.610 mi wide and carries an eastward current of 1.25 mi/h. How far upstream is the boat when it reaches the opposite shore?

153. ## trig

Let P be the point on the unit circle U that corresponds to t. Find the coordinates of P and the exact values of the trigonometric functions of t whenever possible. 2pi 3pi/4 5pi/6 Three questions. I think those are supposed to be t.

154. ## math

Determine whether the system is consistent, inconsistent, or dependent. 3x - 3y = -9 9x - 9y = -27

155. ## arithmetic

in a geometric sequence the first term is 48 and the fifth term is 3-Find the first 5 terms

156. ## Problem with 2 English sentences (French student)

Bonjour! Dans un livre, j'ai lu cette phrase (je précise que l'auteur parle d'une situation présente aux États-Unis): Starbucks promised to create a new line of three fair-trade-certified whole-bean coffees (and four more under its Seattle's Best Coffee

157. ## Chemistry

If you can show me an example of one problem, I have no idea how to approach this. Calculate where the number 40.67 came from. Use the Clapeyron-Clausisus equation. Assuming that delta H vap does not change with temperature, this equation relates the

158. ## chemistry

how many grams of potassinum nitrate are produced from 81.6kg of potassinum chloride and 40.8 kg of hydrogen nitrate? 4KCl+4HNO3+O2------- 4KNO3+2Cl2+2H2O

159. ## phys1

A 528 kg automobile is moving at 20.4 m/s at a height of 5.0 m above the bottom of a hill when it runs out of gasoline. The car coasts down the hill and then continues coasting up the other side until it comes to rest. Ignoring frictional forces and air

160. ## Math!!!

Mrs wong wants to invest \$50000 for 3 years. Simple interest of 5% p.a. for the first year, and then interest compounded monthly at 3% p.a. in every subsequent year. Find the amount she will receive.

161. ## Stats

Explain how to calculate margin of error. What effect does increasing your sample size have on the margin of error? What effect does it have on the confidence level? What effect does it have on the confidence interval?

162. ## Physics

A capacitor consisting of two parallel plates of area A = 4.6 m2 and spacing d = 0.150 m is filled with two parallel slabs of dielectric material of equal thickness and with dielectric constants 1 = 2.20 and 2 = 5.50, respectively. What is the total

163. ## physics

The 20kg object is dropped from a height of 2 meters. Find its speed when it hits the ground. Give your answer in meters per second.

164. ## Maths

solve the following eq. [0

An aircraft is traveling horizontally in an easterly direction at a height of 400 m above level ground and at a speed of 120 m/s. when it is directly above the observer, M, it releases a package. In relation to origin O and to x and y directions of east

166. ## Statistics

Consider a binomial experiment with 520 trials and 200 successes. To construct a test for a proportion p, what value do we use for the sample test statistic? Round your answer to two decimal places.

167. ## math

Hiroshi jogs less than 4 miles each day. After n days,he has jogged 16 miles. Which inequality can be used to find the number of days it might have taken Hiroshi to jog 16 miles.

168. ## Geometry

Which statement is true for the expression 6a + 15b − 4a − 8c? Answer A. It can be written as 6a + 15b − 8c − 4a by using addition property of equality. B. It can be written as 6a − 4a + 15b − 8c by using distributive property of addition. C.It

169. ## college

Assignment Testing a Theory Write at least 300 words describing a time when you had to test a theory. This theory may be something you have tested at work, school, or even at home. Answer the following questions in your summary: • What type of informal

170. ## psy

The untimely death of Professor Hathaway halted his groundbreaking research into the uses of solar power. It therefore appears that Hathaway’s research will not result in practical applications. Which one of the following, if true, most seriously weakens

171. ## Algbera

solve for the roots of the quadratic equation 2(x^2 - 4x + 5)=x^2 - x

172. ## earth

how long does it take for light from Jupiter to come to earth. for example tonight the planet Jupiter can be seen by the moon, 2/25/12 and we see the light from the planet and how old is that light. thanks. jerry in colorado USA

173. ## algebra

a landscaper uses square tiles to make garden paths the ends of the paths are always 2 tiles wide, and the center portions of the paths are 3 tiles wide. what equation gives the total number y of tiles needed to make a path with a length of x tiles. the

174. ## Physics

A 7 kilogram bowling ball is dropped from a fourth story window. If each story is 3 meters high, use energy conservation (not the equations of motion) to find the ball's velocity when it strikes the ground. Ignore air resistance. 1/2 m v^2= mgh v= sqrt

175. ## COLLEGE CALCULUS. HELP!

Find the derivative of the function. 1. F(x)= (1+2x+x^3)^1/4 2. f(t)= (1+tant)^1/3

176. ## PED 212

Reflective Journal After reading Chapter 1, reflect on how your perceptions of physical education have changed based on your understanding of its evolution.

177. ## phys3

A motorist driving a 1100-kg car on level ground accelerates from 20.0 m/s to 30.0 m/s in a time of 5.6 s. Neglecting friction and air resistance, determine the average mechanical power in watts the engine must supply during this time interval.

178. ## science

what could you conclude about the two rock layers if paleontologists would find a trilobite fossil in a rock layer at the top of a hill in South America, then find the same kind of fossil in a rock layer at the bottom of a cliff in Africa

179. ## physics

A 1289 Hz sound from the speaker enters a tube at point A. It then takes two paths, ACD or ABD. Minimum sound is heard when ACD has a length of 94.2 cm and ABD has a length of 41.0 cm. The length of ACD is slowly increased until the point of maximum

180. ## fin/370

Firm A had \$10,000 in assets entirely financed with equity. Firm B also has \$10,000, but these assets are financed by \$5,000 in debt (with a 10 percent rate of interest) and \$5,000 in equity. Both firms sell 10,000 units of output at \$2.50 per unit. The

181. ## Math

In right triangle PRS, sin ÚP = (8/17) What is

182. ## statistics

If a mean average score on 8 tests is 83.750. What is the total sum of the scores?

The time is now between 3 and 4 o'clock. Fifty-four minutes ago, the number of minutes past 2 o'clock was twice the number of minutes that it is now before 4 o'clock. How many minutes before 4 o'clock is it? Show and explain work

asked by mark ,I need help
184. ## Stats

Explain how to calculate margin of error. What effect does increasing your sample size have on the margin of error? What effect does it have on the confidence level? What effect does it have on the confidence interval?

185. ## psychology

the effect of channel presentation and type of processing on recall of meaningful words

186. ## nonfiction

why did the egyptians have such great respect for the pharaohs ?

187. ## Calculus 3

Given the function f(x,y)=y/(x^2+y^2), give and identify the level curves for k=1, k=1/2, and k=1/4, and draw a contour map showing these level curves. Any help would be immensely appreciated. Thanks

188. ## Math

Mary has 8 pairs of dress shoes. How many different ways can she arrange five pairs of her shoes in her closet?

189. ## math

For the quadratic surface defined by 36x^2-72x-9y^2-36y-16z^2+96z-288=0 Put the surface into standard form and identify the center of the surface

190. ## chemistry

You are a chemist requested to review and analyse certain debris found on thebottom of aboot found in a crime scene. The debris contains metal fragments. If you identify the metal fragments---it will help the detctive identify the locations traveled by the

191. ## chemistry

A 0.85 g sample of solute with a molecular mass of 185 g/mol is dissolved in 2.25 g of benzene. What is the expected boiling point of the solution?

192. ## yShanQHSqoMzjxzgyLW

cECXBe Is anybody strong in radio here? We need a colleague who would tell us briefly about the transistor T2. I hope there are radio amateurs here. If it`s not on the subject at all, then I`m sorry. I have to write because I have no choice. PS: if the

asked by cECXBe Is anybody strong in radio here? We need a
193. ## precal

given tanx= (1/2) and cscx

We had to write a conversation in Spanish between a clerk and me wanting to buy pants I wanted them to be loose and I had to pay in cash Could you please check La dependienta: ¿En qué puedo servirle señor? La clienta: Busco los pantalones negro pero

195. ## Chemistry

Cocaine is a non-electrolyte that has a molecular weight of 303.4 g/mole. How many grams must be dissolved in 25.0 mL of Chloroform (density = 1.484 g/mL) to raise its boiling point to 65.5 Celsius? The boiling point of pure Chloroform is 61.2 Celsius. Kb

196. ## Math

Divide 186 marbles between DON and ANDRE so that DON gets twice as many as ANDRE.:(

197. ## physics

4. An object is being lifted to the top of building by a light inextensible rope with a tension of 20 N at an acceleration of 1.4 m/s2. Neglecting air resistance, calculate the object’s mass.

198. ## Science

How would earth move if the sun including its gravity suddenly disappeared? Explain your answer.

199. ## Math

30 percent of the members of a health club are joggers. 55 percent of the joggers are female, and 60 percent of the non-joggers are female. If 500 people are members of the health club, what is the probability that a member is a male jogger? Explain.

200. ## algebra

A collection of nickels, dimes, and quarters amounts to \$9.50. If there are 130 coins in all and there are twice as many dimes as there are quarters, find the number of nickels.

201. ## Math-venn diag.

97 students take history and 124 take english. there are 43 of these students who take both history and english. what is the toal number of students taking history, english or both classes?

202. ## alg 2

The width of a rectangular field is 8 feet shorter than its lenght, if l represents lenigh, write an eguation in terms of l for the perimeter of the field?

A particle p is initially at the point (2, 6) in relation to an origin O, and is moving with velocity (3i + j) m/s. It has a constant acceleration (16i + 24j)m/s^2. Show that after 2 seconds it is moving directly away from O and find its speed at that time

204. ## Chemistry

If 62.7 ml of .208M HCL is needed to needed to neutralize a solution of Ca(OH)2, how many grams of Ca(OH)2 must be in the solution?

205. ## English

Writeacher, I need your help to improve the questions below. I included part of the answers to make sense of the questions. Students should be able to develop their answers by writing ten-line paragraphs. 1) Describe the details of Winston Smith's life as

206. ## Math

solution to the equation x2 – 9x – 22 = 0?

207. ## Numerical Methods

Derive the following formulas using Taylor series and then establish the error terms for each. f'(x) approx= (1/2*h)[4f(x+h)-3f(x)-f(x+2h)] f'(x) approx= (1/4*h)[f(x+2h)-f(x-2h)]

208. ## Chemisty

What mass of aluminum is produced by the decompisition of 7.47 kg of Al2O3?

209. ## social studies

Give 2 examples of how your life might be different if these freedoms and rights were not protested.

210. ## pre-calc

Given sin x = -5/6 and x is in Quadrant IV, find cos 2x (1 point)

211. ## chemistry

what test would you form to verify the presence of the Na+4 and the Po4,3-ion in plant food

212. ## English

Writeacher, I'd like you to check questions from 1 to 4 and improve them. Thank you very much. 1) Give a detailed description of Winston Smith as it appears in the opening to George Orwell's 1984. Refer to the place where he lives, the instrument used by

213. ## Calculus

Find the derivative of f(x) = x^3

214. ## calculus

How do I find the indefinite integral of cosx/(1-cos^2 x)dx?

215. ## math

Explain if 2, 3 and 4cm could be side lengths of a right triangle.

216. ## PHYSICS

A 25,000 kilogram train is traveling down a track at 20 meters per second. A cow wanders onto the tracks 75 meters ahead of the train, causing the conductor to slam on the brakes. The rain skids to a stop. If the brakes can provide 62,500 Newtons of

217. ## PHYSICS

A 7 kilogram bowling ball is dropped from a fourth story window. If each story is 3 meters high, use energy conservation (not the equations of motion) to find the ball's velocity when it strikes the ground. Ignore air resistance.

218. ## chemistry

What is the volume of CO2 at 25 degrees C and 1.3atm if 10.0g of Cburns at STP?

219. ## Math

okay so the equation is -4.9t^2 - 39.2t + 1.6 If the rockets explode at the highest point (which max height is 80 meters) One of the rockets is schedules to explode 2 minutes and 28 seconds into the program. When should the rocket be fired from the barge?

220. ## Math

okay so the equation is -4.9t^2 - 39.2t + 1.6 If the rockets explode at the highest point (which max height is 80 meters) One of the rockets is schedules to explode 2 minutes and 28 seconds into the program. When should the rocket be fired from the barge?

221. ## MATH

THE HOSTEL OF AN ENGINEERING INSTITUTE HAS 320 STUDENTS AND THE FOOD STOCK FOR 80 DAYS. IF 20 STUDENTS LEAVE THE HOSTEL AFTER 20 DAYS,FOR HOW MANY MORE DAYS WILL THE FOOD LAST?

In Dante's inferno, why does Dante have to get rid of his feelings of sympathy and pity toward sin and sinners in order to grow?

223. ## Physical Science

How much work is needed to lift an object with a mass of 51.0 kg to a height of 2.00 meters? Calculate your answer in Joules Answer

224. ## COMM215

Should I use a comma after story and after the question mark as shown below? “Have you ever read the story, ‘The Tell-Tale Heart’ by Edgar Allan Poe?,” Dave asked. And, should I use a comma after say and after the question as shown below? “Did

225. ## spell

For the following items, mark the choice which is spelled incorrectly. Prolong Perpetuete Protract Continue

226. ## social studies

When the Constitution was being ratified by thestates, why did many Americans want these freedoms and rights protected by the government?

227. ## role of IT in mass communication

need some articles related to this topic.plese provide me some links.

228. ## physics

A person does 250 joules of work in pulling back the string of an archery bow. What is the initial speed of a 0.25-kilogram arrow the moment after it is fired from the bow?

229. ## English

Writeacher, I'd like you to help me check this paragraph. Thank you. 1) We are urgently looking for an English school, which is interested in a long-term cooperation (??) with our school. We would like to start with an email partnership followed by a

230. ## Math

30 percent of the members of a health club are joggers. 55 percent of the joggers are female, and 60 percent of the non-joggers are female. If 500 people are members of the health club, what is the probability that a member is a male jogger? Explain.

231. ## pre-algebra

zi drive 420 miles to visit her sister. after she had diven one-third of the way there, she stopped to eat lunch. how many miles did she have left to drive after lunch

232. ## trig

If csc theta = 2, then what is theta approximated to 4 decimal points? RADIANS

233. ## Science

Suppose the moon were closer to Earth. How would the force of gravity between Earth and the moon be different?

234. ## Serial Killers

Could you maybe proofread over this essay I did on serial killers based on books I have read? Thanks! Jack The Ripper and Jeffrey Dahmer By:Bryce Screams and moans are heard all over the town as they unveil the corpse of Jack The Ripper's latest victim.

235. ## math

Make a subtraction number pattern so that the second number is 40. Fill in the blanks for the all 6 numbers.

236. ## Math

r=40-2t shows the relationship between the average rate of speed, r, of a car in meters per second, and the time, t,in seconds, as the car slows down.

237. ## math

Mr. Jaskson's lunch cost \$8.00 plus 8% sales tax. He tipped the server 15% of total bill after sales tax was added. How much did Mr. Jackson spend in all?

238. ## Math

Matt has a deck of 20 cards. Of these 15 are numbers cards and 5 face cards. What is the probability of drawing a number card from the whole deck?

239. ## neuroscience

discuss Clostridium Botulism and Clostridium Tetanus, and how they interfere with SNARE proteins.

240. ## math

ms. gries is an athlete. she is skis every day for 5 days. she skis for 1 1/2 hours for her first day and increases her time by 1 1/4 hours for her next four days. how many hours will she ski on the fifth day? show you work

241. ## English

Writeacher, I rephrased the sentences as you told me. I would also like you to help me rephrase question 1. 1)Go over George Orwell's life focusing your attention on those episodes which strengthened his indifference to accepted values and

242. ## English

Are there any symbols, crests or badges for online and regular support groups??

243. ## prealgebra

How do you solve this??? foodbill:\$18 salestax:%5 Tip:%20

244. ## English

Writeacher, here is the other question I'd like them to answer. 1) Go over George Orwell's life focusing your attention on those episodes which strengthened his indifference to accepted values and strong-mindedness. (I don’t want students to repeat

245. ## math

what is the lowest common denominator of 2/32 plus 4/28

246. ## Math Help

Help me to solve this problem Simplify by adding 5/22t + 2/4t

247. ## math

the ratio of boys to girls in a class is 8:17 . how many boys are there if total students are 375

248. ## Aviation

What location of CG (forward or aft center of gravity) would be the most fuel efficient? The most stable? Could you change this situation if you changed the design of the aircraft?

249. ## Education

The major emphasis of Movement programs for young children is the development of concepts. In what three major categories are they broken into? Body,space,time What , who, were Movement skill and fitness Awareness , knowledge and understanding I think it's

250. ## Political SCIENCE

Briefly explain the steps that a President-elect goes through from the national convention to the inauguration

251. ## physics

When struck with hammer a turnng fork vibrates back and forth 230 times every second. What is the wavelength of a sound wave coming from this turning fork?

252. ## Calculus

Use the first principles definition to differentiate y = 5x^2. Please show all your work!

253. ## ela <Ms.Sue>

what does this quote from jean arp "Soon silence will have passed into legend. Man has turned his back on silence. Day after day he invents machines and devices that increase noise and distract humanity from the essence of life, contemplation, meditation"

254. ## world history

Analyze the changes in global commerce between 1750 and 1900 due to changes in technology, communication, and economic theory.

255. ## Chemistry

(2.50mL)(0.10M) / 75.00mL = 0.003333 Im not sure how many sig figs to use. Would it 3.33e-3?

256. ## English

Thank you very much. I would like you to help me rephrase question 1, and check 2 and 3. 1)Go over George Orwell's life focusing your attention on those episodes which strengthened his indifference to accepted values and strong-mindedness 2) What sort of

257. ## Chemistry

[H^+] = 2.7 x 10^-3 Calculate for [OH^-] [OH^-] = ? M

258. ## stats

if one can choose any six of 40 numbers, in any order, to play a state lottery game, how many different arrangments are possible?

259. ## chemistry homework help!!

if you have 380.0mL of water at 25.00 degrees Celsius and add 140mL of water at 95.00 degrees Celsius, what is the final temperature of the mixture? Use 1.00 g/mol as the density of water.

260. ## Neuroscience

compare ionotropic and metabotropic receptor channels in both structure and function

261. ## college algebra

Write in y=mx+b form the line perpendicular to 5x-y=2 passing through (10,-2)

262. ## Chemistry

If acetic acid is the only acid that vinegar contains , calculate the concentration of acetic acid in the vinegar. if the pH of vinegar is 2.7

263. ## Physics

Under what conditions would an applied force increase the Kinetic energy of an object?

264. ## U.S. History

According to Paine, how has our connection to England made the American colonies weaker in a military-political sense?

265. ## English

Writeacher, I need you to check a paragraph I wrote some time ago. You revised just part of it. Thank you. 1)Speaker 4 has had lots of interviews lately. He was getting a bit blasé by the time he had my last interview. What he hadn't planned though was he

266. ## Physics

The mass of the thread was neglected in the experiment. If this mass were 0.2 gram, estimate the largest error in the acceleration that it might have caused. Could this account for your observed errors?

267. ## child care

children should not be served drinks in containers made of a( Styrofoam c) treated ceramic B) uninsulated d) stainless steel

268. ## nonfiction

why was the reign of ramses 2 so successful?

270. ## Math

Solve for x. 9-4x

I have to convert 1 minute 25 seconds into just seconds. Im not sure what to do. Thank you!!

272. ## chemistry

a large 1.5 x 10^6liter tank contains water polluted with lead (II) nitrate at a molarity concentraion of 2.5 x 10^-6 M to the tank, you add 59.7 liters of 0.075 M potasium chloride solution. did you add enough potassium chloride to remove all the lead(II)

273. ## college algebra

Given f(x) = sqrt of x+4 and g(x) = 1/x find (gof)(x).

274. ## Calculus

Find the derivative of f(x) = x^3 Show all the work please and thank you!

275. ## math

A customer is buying a \$100 drill and two \$15 drill bit sets. The customer uses a gift card worth \$50 to pay for a portion of their bill. How much cash will the customer pay (before taxes)?

276. ## social studies

Please give me 2 more reasons of how totem poles and history books are the same or similar.Thank You Very Much!!!!!!!!

277. ## Calcules

Find thllowing limits using agebraic manipulations. a) lim (4t^2 -t-1)/(t^2 -1) = ? t--> -1

278. ## Calcules

Find the following limit using algeraic manipulations. (Give excat asnwers). lim (4t^2 -t-1)/(t^2 -1) t--> -1

279. ## Math

97 students take history and 124 take English. re of the students take both. What is the total # taking both classes.

280. ## stats

20. The sponsor of a local soccer tournament is responsible for writing an article for the local paper announcing the 151, 2nd, and3rdplacewinners. If10teamsareinvitedtothe tournament, and the sponsor wanted to get the article written in advance so it can

281. ## Math-Probab.

In a deck of 52 cards there are 13 hearts. If 3 are drawn from the deck, without replacement, what is the probability that all 3 cards will be hearts?

282. ## General

Does anyone know any good websites that show statistics for almost about anything??

283. ## math

What is the scientific notation for 15 x 10 to the 5th?

284. ## nonfiction

what items were found inside pyramids ?

285. ## nonfiction

what were the accomplishments of queen hatshepsut?

286. ## Language Arts

Need help figuring out which word goes in the blank out of this, that, these, or those. The sentence is: "Let's exchange __________ bread for these crackers." I know it is not these or those but not sure between this or that. Thanks...

287. ## neuroscience

discuss spatial and temporal summation

The position of a particle moving along the x-axis is given by x = 3.49t2 – 2.21t3, where x is in meters and t is in seconds. What is the position of the particle when it achieves its maximum speed in the positive x-direction? ý need only final

289. ## college algebra

Given f(x)= x^2-3+2 and g(x)=2x-4 find (fg)(-3)

(0.80M)(5.00mL) = c2 (75.00mL) c2 = 5.33e-2 M Is the correct amount of sig figs?

291. ## ma th problem

having problem solving (3-x)/(7-x)=4/(x-7)

292. ## Algebra; MAJOR HELP

Solve the equation. Provide an explanation please. s^2-7s+14=2

293. ## Algebra

-5r/x-9 - -8/x-9

discuss the legal and enthical constrains expressed by businesses in zimbabwe.

295. ## life skills

how an essay is constructed?

296. ## math

how would you solve: (t-2)(3t-1)(4t+3)-(2-t)(2-t)(t+5)