# Questions Asked onFebruary 25, 2013

1. ## Algebra

What is the side length of a square with an area of 144x²? A.12 B.12x C.±12x D.no solution I think it is C...?

2. ## Algebra

What is the value of b in the triangle shown below? The triangle they are showing is a right triangle...the length is 3b and the width is b...on the inside of the triangle it says 24in^2. A.–4 in B.4 in C.±4 in D.no solution Please help I do not know

3. ## Statistics

Problem 6 A histogram shows the number of hours students spent preparing for a test. The table below gives the intervals and the heights of the bars (in percent per hour). Intervals contain the left endpoint but not the right. No student spent 25 hours or

4. ## Math Perimeter

Draw a figure with 22 units

5. ## Physics

A horse runs 15 m [N 23° E] and then 32 m [S 35° E]. What is the total displacement of the horse? I can't even visualise this... My friend told me the basic steps on how to solve it, but I got the wrong answer anyways... d1 = 15 m [N 23° E] d1x = 15m

6. ## Chemistry

Explain how you would prepare 100.0 mL of 0.500 M NaCl solution. Include the appropriate glassware and calculations.

7. ## dynamics

the normal acceleration of a particle on the rim of a pulley 10 ft in diameter is constant @ 8000 ft/s^2. determine the speed of the pulley in rpm

8. ## algebra

a hyperbola has vertices (+-5,0) and one focus (6,0) what is the standard form equation of the hyperbola.

9. ## chemistry

calculate the percentage of water in each of the following hydrates SrCl2*6H2O

10. ## Physics

A proton (mass m = 1.67 10-27 kg) is being accelerated along a straight line at 3.6 1015 m/s2 in a machine. The proton has an initial speed of 2.4 107 m/s and travels 2.8 cm. (a) What is its speed? (b) What is the increase in its kinetic energy?

11. ## Maths

I divide exactly by 100 my first two digits are equal the sum of my four digits is 8

12. ## math

ther is 5/8 of left over , jay eats 2/15 of left over . how much of whole pie did jay eat

13. ## Physics

A long, straight wire carrying a current of 317 A is placed in a uniform magnetic field that has a magnitude of 7.69 × 10-3 T. The wire is perpendicular to the field. Find a point in space where the net magnetic field is zero. Locate this point by

14. ## Chemistry

Please show work. 2Al(s) + 2NaOH(aq) + 6H2O(l) ---> 2NaAl(OH)4(aq) + 3H2(g) What mass of hydrogen gas would be formed from a reaction of 2.48 g Al and 4.76 g NaOH in water? Pb(NO3)2(s) + 2NaI(aq) ----> 2PbI2(s) +2NaNo3(aq) (a) If the solution contains 7.00

15. ## Algebra

Ellen is 11 years older than Maja. Last year Ellen was twice as old as Maja. How old is Maja now?

16. ## algebra

find an equation that models the path of a satelite if its path is a hyperbola, a=55,000km and c=81,000km assume that the center of the hyperbola is the origin and the tranverse axis is horizontal

17. ## PLEASE COULD SOMEONE HELP ME OUT Physics

Two long straight aluminum wires, each of diameter 0.30mm, carry the same current but in opposite directions. They are suspended by 0.50m long strings...If the suspension strings make an angle of 3.0 degree with the vertical, what is the current in the

Please check my answers. The nswers are at the bottom. 3. Fill in the blank with the correct form of the verb: yo/dormir. yo _________ 4. Fill in the blank with the correct form of the verb: ella/devolver. ella _________ 5. Fill in the blank with the

19. ## Math

Find the area for a triangle: base 14 cm, height 5.5 cm. 19.5 cm² 77 cm² 38.5 cm² 770 cm²

20. ## Understanding Perimeter

When finding the perimeter of a figure on a grid, why do you not count the spaces inside the grid?

21. ## differential equation

If P(t) is the amount of dollars in a savings bank account that pays a yearly interest rate of r% compounded continuously ,then dP/dt=(r/100)(P) , t in years . Assume the interest is 5% annually ,P(0)=\$1000 ,and no monies are withdrawn a)how much will be

22. ## Information Systems

Problem #2 from page 173 Given the following business scenario, create a Crow’s Foot ERD using a specialization hierarchy if appropriate. Tiny Hospital keeps information on patients and hospital rooms. The system assigns each patient a patient ID number.

23. ## chem

If 507 g FeCl2 were used up in the reaction FeCl2 + 2NaOH Fe(OH)2(s) + 2NaCl, how many grams of NaCl would be made?

24. ## chem

What are the equilibrium concentrations of H2SO3, H+, HSO3−, and SO32−in a 0.050 M solution of sulfurous acid H2SO3 at 25 oC? For H2SO3 at 25 oC, Ka1 = 1.5×10−2 and Ka2 = 1.0×10−7

25. ## chemistry

a sample of Ag2S has a mass of 62.4g. what mass of each element could be obtained by decomposing this sample?

26. ## math

A RECTANGLE HAS A WIDTH OF X CENTIMETERS AND A PERIMETER OF 8X CENTIMETERS. A SQUARE HAS SIDES OF LENGTH 1/4 THAT OF THE RECTANGLE A) FIND THE LENGTH OF THE RECTANGLE B) FIND THE PERIMETER OF THE SQUARE C) FIND HOW MANY CCENTIMETERS GREATER THE RECTANGLE

27. ## statistics

In a certain region, the mean annual salary for plumbers is \$51,000. Let x be a random variable that represents a plumber's salary. Assume the standard deviation is \$1300. If a random sample of 100 plumbers is selected, what is the probability that the

28. ## chem

What are the equilibrium concentrations of H2SO3, H+, HSO3−, and SO32−in a 0.050 M solution of sulfurous acid H2SO3 at 25 oC? For H2SO3 at 25 oC, Ka1 = 1.5×10−2 and Ka2 = 1.0×10−7

29. ## accounting

1-On May 1, 2012, Pinkley Company sells office furniture for \$150,000 cash. The office furniture originally cost \$375,000 when purchased on January 1, 2005. Depreciation is recorded by the straight-line method over 10 years with a salvage value of \$37,500.

30. ## management science

definitions of marketing,the author and the year

31. ## Math

The range of a set of data is 15, and the interquartile range of the same set is 12. Which of the following statements is true about the set? A) The two ranges are close together, so there is probably an outlier in this set B) The two ranges are close

32. ## chemistry

heating copper sulfate pentahydrate will evaporate the water from the crystals. leaving anhydrous copper sulfate,. a white powder. what mass of anhydrous CuSO4 would be produced by heating 500.0g of CuSO4*5H2O

33. ## Algebra

On a math test, k students in the class averaged 80%. The remaining students in the class,q students, averaged 94% on the test. The class average on the test was 88%. Express the ration of k/q in simplest form.

34. ## Physics

A block of mass m is dropped onto a relaxed spring constant k. The block becomes attached to the spring and compresses the spring a distance d before momentarily stopping. (Use any variable or symbol stated above along with the following as necessary: g

35. ## Physics

A small compass is held horizontally, the center of its needle a distance of 0.460 m directly north of a long wire that is perpendicular to the earth's surface. When there is no current in the wire, the compass needle points due north, which is the

36. ## physics

Two spherical shells have a common center. A -2.00 × 10-6 C charge is spread uniformly over the inner shell, which has a radius of 0.050 m. A +5.50 × 10-6 C charge is spread uniformly over the outer shell, which has a radius of 0.15 m.

37. ## Math

The first question is this: Helen designs a rectangle with an area of 225 square units. Her rectangle is the largest rectangle (that is, with largest area) with whole-number side lengths that can be made from the perimeter of the rectangle. A. Whay are the

38. ## Algebra II

A rock is thrown upward with a velocity of 28 meters per second from the top of a 36 meter high cliff, and it misses the cliff on the way back down. When will the rock be 9 meters from the water below. Round to two decimal places.

39. ## Math

Solve the proportion. Where necessary, round to the nearest hundredth. 8 over 2 = x+3 over 4

40. ## math

A football field is 120 yards long and 53 yards wide. How much fencing is needed to enclose the field?

41. ## physics

A skateboarder starts from rest at the top and skates down a slope as shown. After 2.5 seconds, the skateboarder has reaches a speed of 10 metres per second. What is the skateboarder's acceleration?

42. ## U.S History

Why were the Vietcong so successful against the United States? A.The Vietcong held the strategically important Ho Chi Minh Trail. B.U.S. troops could not engage the Vietcong in traditional warfare. C.Vietcong forces had superior weapons and military

43. ## Physics

A point charge Q1=-2 microcoulomb is located at x=0, and a point charge Q2=+8 microcoulomb, is placed at x=-0.5 on the x axis of a cartesian coordinate system.The goal of this problem is to determine the electric field,at various points along the x axis.

44. ## Chemistry

you have 20% sucrose solution. you need to mke 100ml of 15% sucrose solution. which is the correct dilution? A. 85ml of 20% sucrose and 15ml of h2o B. 25ml of 20% sucrose and 75ml of h2o C. 75ml of 20% sucrose and 25ml of h2o D. 15ml of 20% sucrose and

45. ## Math Perimeter

Draw a figure with the given perimeter, 10 units.

46. ## physics

A sled is dragged along a horizontal path at a constant speed of 1.5 m/s by a rope that is inclined at an angle of 30.0° with respect to the horizontal (the figure below). The total weight of the sled is 470 N. The tension in the rope is 240 N. How much

47. ## consumer math

amy miller's insurance policy has a \$218.00 premium for 25/100 bodily injury limits and \$25,000.00 property damage limits. the collision premium is \$74.00. amy's driving-rating factor is 2.4. what is her annual premium?

48. ## Physics: Pressure Problem

What is the total pressure at the bottom of a lake at a depth of 38m?

49. ## physics

A sled rider with a combined mass of 50.0kg are at the top of a hill of a 14m above the level of ground below. The sled is given a push providing an initial kinetic energy of 1700J. What is the potential energy at the top of the hill? After the push, what

50. ## physics

A spherical surface completely surrounds a collection of charges. Find the electric flux (with its sign) through the surface if the collection consists of (a) a single +1.80 × 10-6 C charge, (b) a single -8.20 × 10-6 C charge, and (c) both of the charges

51. ## Chemistry

You have .5g of copper. If the nitric acid is 16 M HNO3, how many milliliters of nitric acid will react exactly with that amount of copper. I know that when I get that volume I will triple it so that there will be excess acid and the copper will be the

52. ## edu

Hannah said, "I like blue the best. It is my favorite color. I am the only one who likes blue this much. That's why everything of mine is blue." This is typical of __________ speech. A. personal function B. heuristic function C. representational D.

53. ## Chemistry Help!!!!!

How many milliliters of 0.635M K2CrO4 are needed to precipitate all the silver in 410mL of 0.158M AgNO3 as AgCrO4 ?

Hannah said, "I like blue the best. It is my favorite color. I am the only one who likes blue this much. That's why everything of mine is blue." This is typical of __________ speech. A. personal function B. heuristic function C. representational D.

55. ## college algebra

If a rocket is propelled upward from ground level, its height in meters after t seconds is given by h=-9.8t^2+88.2t. During what interval of time will the rocket be higher than137.2m? Do I set it up like this? -9.8(1)^2+88.2(1)+137.2 = 215.6 Then

56. ## Physics

A flat thin non-conducting ring has an inner radius R1 and an outer radius R2 . The disk is uniformly charged with charge per unit area σ(>0) . (a) What is the electric field at the center, P , of the ring? Express your answer in terms of the following

57. ## Chemistry: Freezing point

An aqueous solution is prepared by dissolving 1.08 g of human serum albumin, a protein obtained from blood plasma, in 50.0 mL of water. The solution has an osmotic pressure of 0.00770 atm at 298 K. What is the molar mass of the albumin? Answer: 6.86 x 10^4

58. ## Physics

You have a wire of length L = 2.1 m for making a square coil of a dc motor. The current in the coil is I = 1.8 A, and the magnetic field of the motor has a magnitude of B = 0.32 T. Find the maximum torque exerted on the coil when the wire is used to make

59. ## Physics

At a low point of its swing, a pendulum bob with a mass of 0.20kg has a velocity of 4.0m/s. (a) What is its kinetic energy? (b) How high will the bob swing above the low point before reversing direction?

60. ## Chem

in the reaction NO3+CaCl2=2AgCl+Ca(NO3)2, how many grams of excess will remain when 20 grams of AgNO3 are reacted with 15 grams of CaCl2

61. ## college physics

A 4m long copper wire has a diameter of 2mm and carries a current of 10A. Determine the ff: a. current density in the wire b. electric field c. potential difference between the ends of the wire d. resistance of the wire

62. ## physics

A crate of mass 50kg is pulled up a rough inclined plane ,inclined at an angle of 60 degree to the horizontal.determine the total work done in moving the crate to the top of the inclined 200 meter hight.(show workin).

63. ## Chemistry

A 1.065-g sample of an unknown substance is dissolved in 30.00 g of benzene; the freezing point of the solution is 4.25 degrees C. The compound is 50.69% C, 4.23% H, and 45.08% O by mass. Info you might need on benzene: Normal Freezing point,degrees C:

64. ## Algebra

Mattie Evans drove 300 miles in the same amount of time that it took a turbo propeller plane to travel 1300 miles. The speed of the plane was 200 mph faster than the speed of the car.Find the speed of the plane.

65. ## Accounting

Date Activities Units Acquired at Cost Units Sold at Retail Mar. 1 Beginning inventory 50 units @ \$50/unit Mar. 5 Purchase 200 units @ \$55/unit Mar. 9 Sales 210 units @ \$85/unit Mar. 18 Purchase 60 units @ \$60/unit Mar. 25 Purchase 100 units @ \$62/unit

66. ## chemistry

How many of the following electron configurations are allowed? 1s22s22p7 1s22s22p62d1 [Ne]4s24p4 [Ar]3d64s2 1s22s22p83s23p4

67. ## Math

I have the answers but i need to know the steps. Michelle has \$60. If her friend Kristin has \$300, what percent of kristins money does michelle have? I got 80% To Pass a test Kristin had to get 75% of the answers correct. If there were 84 questions on the

68. ## Chem Help!!!!

In an experiment, 0.771g Cr(s)reacts completely with 0.712g O2 to form a single solid compound. Write a balanced equation

Two long straight aluminum wires, each of diameter 0.30mm, carry the same current but in opposite directions. They are suspended by 0.50m long strings...If the suspension strings make an angle of 3.0 degree with the vertical, what is the current in the

70. ## math

A side of an equalateral triangle is 2/8 cm long. Draw a picture that shows the triangle. What is the perimeter of the triangle?

71. ## Economics

We're looking at the market for cat food. When the price is \$10, the quantity sold is 1000 bags. When the price drops 10%, the quantity sold increases 30%. Calculate the price elasticity of demand. (Answer in format X.XX, round to the nearest hundredth.) I

72. ## physics

A portable electric heater uses 23.8 A of current. The manufacturer recommends that an extension cord attached to the heater receive no more than 2.60 W of power per meter of length. What is the smallest radius of copper (resistivity 1.72 x 10-8 Ω·m)

73. ## chem

A weak acid HA is 1.0% dissociated in a 1.0 M solution. What would its percent dissociation be in a 5.0 M solution?

74. ## Physics

A point charge Q1=-2µC is located at x=0, and a point charge Q2=-8µC is placed at on the x -axis of a cartesian coordinate system.The goal of this problem is to determine the electric field,E(x)=E(x)x^ , at various points along the -axis. (a)What is E(x)

75. ## PLEASE COULD SOMEONE HELP ME OUT

Two long straight aluminum wires, each of diameter 0.30mm, carry the same current but in opposite directions. They are suspended by 0.50m long strings...If the suspension strings make an angle of 3.0 degree with the vertical, what is the current in the

76. ## Chemistry

What is the freezing point of a soluton is which 10.0 g of naphthalene [C10H8(s)] is dissolved in 50.0 g of benzene [C6H6(l)]? Extra info you might need: benzene= 5.12 degrees C m^-1 Answer should be: -2.46

77. ## Physics ~really need help!~

1) A 1 kg mass moving at 1 m/s has a totally inelastic collision with a 0.7 kg mass. What is the speed of the resulting combined mass after the collision? 2) A cart of mass 1 kg moving at a speed of 0.5 m/s collides elastically with a cart of mass kg at

78. ## math

Order these numbers from smallest to largest. 8.00 8.30 0.800 0.83 I think the order is 0.800 0.83 8.00 and then 8.30

79. ## Physics

Find the maximum height reached by a ball thrown upward at a velocity of 95 ft/s

80. ## Chemistry

You prepare a solution from 10.0 mL of 0.100 M MOPS buffer (3-morpholinopropane-1-sulfonic acid) and 10.0 mL of 0.083 M NaOH. Next, you add 1.00 mL of 5.77 × 10-5 M lidocaine to this mixture Denoting lidocaine as L, calculate the fraction of lidocaine

81. ## math

After dinner, Amanda, Trey and John received the check for their meal. Trey is paying 1/4 of the check and leaving no tip. Amanda is paying the remainder of the check. John is leaving 20% of the check as a tip. Using C as the amount of the check, match

82. ## phy

A bicycle and its rider together has a mass of 62 kg. What power output of the rider is required to maintain a constant speed of 4.6 m/s (about 10.3 mph) up a 5.0% grade (a road that rises 5.0 m for every 100 m along the pavement)? Assume that frictional

83. ## physics

A proton (mass m = 1.67 10-27 kg) is being accelerated along a straight line at 2.1 1015 m/s2 in a machine. The proton has an initial speed of 2.4 107 m/s and travels 4.2 cm. (a) What is its speed? 1 . m/s (b) What is the increase in its kinetic energy? 2

84. ## Math-geometry

A regular polygon with all sides that are congruent and all angles that are congruent. Thus, the regular triangles are equilateral triangles, and the regular quadrilaterals are squares. All equilateral triangles are similar to one another and all squares

85. ## Chemistry

Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 °C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 17.3 g of biphenyl in 34.0 g of benzene?

86. ## Math

A golfer hits ate shot 325 m long straight golf hole. The ball is hooked 18 degrees to the left. The ball lands 185m from the tee. Hoe far is the ball from the hole?

87. ## Math

Given the points A(0,0),B(3,1),and C(1,4), what is the measure of angle ABC?

88. ## Chemistry

What is the freezing point of a soluton is which 10.0 g of naphthalene [C10H8(s)] is dissolved in 50.0 g of benzene [C6H6(l)]? Extra info you might need: benzene= 5.12 degrees C m^-1 Answer should be: -2.46

89. ## Calculus

A donut is generated by rotating the circle, S, defined by (x-3)^2 +y^2 =4 about the y axis. If the anagement of dunkin donuts wants to know how to price these donuts use intergral calculus to help them (i) set up a definite intergral to determine the

90. ## Math

A kite string makes a 43 degree with the ground. The string is staked to a point 104 meters from a point on the ground directly below the kite. Find to the nearest meter the length of the kite string.

91. ## Chemistry

What mass of sucrose, C12H22O11, should be added to 75.0 g H2O to raise the boiling point to 100.35 degrees C? Molal boiling point of water: 0.512 Kb, degrees C m^-1 Answer: 18 g sucrose

92. ## math

Solve for x. 2x =368 - 4

93. ## math

Ted made a scale model of a submarine for his science class. a. What is the volume of Ted’s model? b. If 1 inch in the model represents 20 feet in the actual submarine, what is the volume of the actual submarine? front round is 3 inch radius/length 3

94. ## Physics

The work done by an external force on an electron as it moves from point A to point B is 6.3 × 10-14 J. If it was started from rest and had 3 × 10-14 J of kinetic energy when it reached B, what is the potential difference VB-VA?

95. ## science

A car with a mass of 700 kg moves at 18 m/s. What braking force is needed to bring the car to a halt in 10 s?

96. ## finance

You have chosen biology as your college major because you would like to be a medical doctor. However, you find that the probability of being accepted to medical school is about 6 percent. If you are accepted to medical school, then your starting salary

97. ## Physics

The membrane that surrounds a certain type of living cell has a surface area of 4.50 10-9 m2 and a thickness of 1.08 10-8 m. Assume that the membrane behaves like a parallel plate capacitor and has a dielectric constant of 5.40. If the charge in part (a)

Two long straight aluminum wires, each of diameter 0.30mm, carry the same current but in opposite directions. They are suspended by 0.50m long strings...If the suspension strings make an angle of 3.0 degree with the vertical, what is the current in the

99. ## Biology

Which of the following mutations would you expect to have the greatest effect on a living cell? A. A mutation that changes a single base in a region of noncoding DNA B. Energy release from plutonium C. Consumptions of preexisting organic compounds Im

100. ## Physics

A proton (mass m = 1.67 10-27 kg) is being accelerated along a straight line at 3.1 1015 m/s2 in a machine. The proton has an initial speed of 2.4 107 m/s and travels 3.6 cm. (a) What is its speed? m/s (b) What is the increase in its kinetic energy? J

101. ## math

a basketball player scored 17 timea during one game. He scored a total of 28 pts,two for each two-pt shot and one for each free throw. How many two-pt shots did he make? How many free throws? How many two-pt shots did he make? simplify

102. ## English

A formal letter to a national television network.

103. ## physics

After falling from rest from a height of 30 m, a 0.48-kg ball rebounds upward, reaching a height of 20 m. If the contact between ball and ground lasted 1.8 ms, what average force was exerted on the ball?

104. ## chemistry

What is the limiting reagent for 6HCl + Fe2O3 = 2FeCl3 + 3H2O ? 6HCl has 18.44 moles and Fe2O3 has 2.91 moles. Also how many moles would FeCl3 produce?

105. ## Math

48000 people voted in the last election in the town of Southboro. If only 55% of the registered voters voted in the last election, how many people are registered to vote? I got 87,273 Nik put \$264 in a savings account that pays 3% annual interest. How much

106. ## Algebra

Use a calculator to evaluate the expression. Write the result in scientific notation and in decimal form. Did I do think correctly? 6000000 * 324,000 =1.944*10^12 =1944000000000

107. ## Statistics

The distribution of ages in the United States in the year 2010 is given below. Intervals include the left endpoint but not the right; the number of people aged 100 or more was not zero but it was so small that it makes no difference to the table. You can

108. ## Stasistics

Problem 2 Here is another distribution you have seen before; it is the distribution of scores discussed in Lecture 2.1. 4|8 5|9 6|3337 7|0002355 8|01234788 9|015556 10|0 : 6.0 points Each part is worth 2 points. a) Use the stem and leaf plot to find the

109. ## statistics

the breaking distance of a Honda CRV can be approximated by a normal distribution, where the mean is 53 meters and the standard deviation is 3.8 meters. Let x be a random variable that represents a braking distance. Find the probability that a randomly

110. ## Physics

A 3.0m wooden platform is suspended from the roof of a house by ropes attached to its end. A painter whose mass 80kg stands 1.2m from the left-hand end of the platform, whose own mass is 18kg. Find the tension in each rope.

111. ## MATH

A RECTANGLE HAS A WIDTH OF X CENTIMETERS AND A PERIMETER OF 8X CENTIMETERS. A SQUARE HAS SIDES OF LENGTH 1/4 THAT OF THE RECTANGLE A) FIND THE LENGTH OF THE RECTANGLE B) FIND THE PERIMETER OF THE SQUARE C) FIND HOW MANY CCENTIMETERS GREATER THE RECTANGLE

112. ## statistics

The average height for Chinese women is 62.5 inches with a standard deviation of 4.6 inches. What is the probability that a randomly selected woman in the United States would be ≥69 inches tall?

113. ## math

Consider the supply equation where x is the quantity supplied in units of a thousand and p is the unit price in dollars. p=x^3+x+10 Determine the price at which the supplier will make 2,500 units of the commodity available in the market. (Give your answer

114. ## math

Anita has two sisters and three brothers. The mean of all their ages is 6 years. Wht is the mean of their agesin 10 years and 20 years?

115. ## Math

In his pocket, a boy has 3 red marbles, 4 blue marbles, and 4 green marbles. How many will he have to take out of his pocket to ensure that he has taken out at least on of each color?

116. ## SCIENCE

THE VALUE OF KC=6.2 AT 750K FOR THE REACTION CO+H20 CO2.IF INITIALLY THE QUANTITIES OF CO AND H2O ARE 2 MOLES IN 1L.WHAT COULD BE THE EQUILIBRIUM CONCENTRATIONS FOR ALL CHEMICALS?

117. ## chemistry

Calculate the wavelength of a proton with energy 2.45 eV.

118. ## Math

I have the answer to the first part of the question, which is What is the volume of Ted's Submarine model. The answer is 490.08=volume. The second part of the question is if 1 inch in the model represents 20 feet in the actual submarine, what is the volume

119. ## Math

Factor the polynomial 4x^2- 81

120. ## Chemistry

A 205 mg sample of a diprotic acid is dissolved in enough water to make 250.0 ml of solution. The pH of this solution is 2.15. A saturated solution of calcium hydroxide (Ksp= 1.3 x 10-6) is prepared by adding excess calcium hydroxide to water and then

121. ## Math (Simplifying Expressions)

How would I solve this? 48÷4x5-2x5

122. ## physics

A 62-kg man standing on a scale in an elevator notes that as the elevator rises, the scale reads 843 N. What is the acceleration of the elevator? .

123. ## 7th g-math

An ice-cream shop offers a small size cone and a large size cone. The height of the large cone is 2 times the height of the small cone. The radius of the large cone is 2 times the radius of the small cone. Which statement is true about the volumes of the

124. ## math

Jenny is paid a monthly salary of \$1600. She saves 1/5 of her salary each month A) Calculate her saving each month. B) How much will she save in a year?

125. ## science

A 75-N sack is dragged along the floor with a horizontal force of 100N. The frictional force is 30N. What is the direction of net force

126. ## Physics

A car travels 150 km for two hours east of a starting point, turns around and travels due west 300 km for three hours. What is the car's net velocity for the trip?

127. ## physics

When two billiard balls of equal mass collide obliquely, the balls will always separate at what angle?

128. ## maths

find the number of bricks, each measuring 25 cm x 16 cm x 10 cm required to construct a wall 24 m long, 6 m high and 0.4 m thick. the mortar occupies (1/10)th of the volume of the wall

129. ## physics

In terms of impulse and momentum, why are airbags in automobiles a good idea? A.)Airbags actually do not help if a car is in an accident. B.)They increase the amount of force involved in a collision. C.)They decrease the amount of time for a collision to

130. ## Algebra

Maybe that was to confusing...we have a data sheet to fill out - 2 questions with simple interest and 2 with compound interest. I just need the simple interest help: Prob. #1 Find the total amount if you deposit \$500. at a rate of 5% for two years using

131. ## English - The Lovely Bones

I asked this question yesterday but no one has answered thus far so I thought I'd try asking again: If anyone has read The Lovely Bones novel could you please explain 2 things to me. 1) Is Ruth Connors able to see the dead? When she moves to NYC she writes

132. ## C.E.A Response (Quick english please edit)

Will you please read over this claim. evidence. analysis response and tell me if there are any errors or things that should be changed? thanks! C. E. A. Response Q: Why did the Nazis give off a nice persona when they first engaged with the Jews? The Nazis

133. ## math

Carpet sells for \$2 per square foot. It will cost you \$360 to recarpet your room. If your room is 20 feet long, how many feet wide is it?

134. ## chemistry

which element is the most reactive in group 3? group 4?

135. ## Understanding Perimeter

A park has the shape of a trapezoid. Two of the sides are 25 meters long. The other two sides are 40 meters and 20 meters long. What is the perimeter of the park?

136. ## phy

A brick of mass 0.6 kg slides down an icy roof inclined at 30.0° with respect to the horizontal. (a) If the brick starts from rest, how fast is it moving when it reaches the edge of the roof 1.75 m away? Ignore friction. m/s (b) Redo part (a) if the

137. ## chemistry

Calculate the wavelength, λ, in meters of a photon capable of exciting an electron in from the ground state to n = 4.

138. ## physics

A softball player swings her bat through her full range of motion of 392 degrees in 0.3 secs. What is the angular velocity of the bat? What is the average acceleration of the bat?

1.)A 0.5 kg hockey puck moving at 35 m/!@#\$%^&s a straw bale, stopping in 1 s. a) What impulse is delivered to the ball? b) What force is exerted on the puck? 2.) A racing car with a mass of 1400 kg hits a slick spot and crashes head-on into a concrete

140. ## Math

If 16 ounce cost \$1.19 what is the price cost of 1 ounce

141. ## Math

Evaluate the expression, reducing to simplest form log(log1000^10000)= BLANK +logBLANK Your answers must be integers.

142. ## math

he dimensions of Liz's desk are 3.2 feet wide and 4.6 feet long. Match the description on the left with the appropriate calculation. Length Width Perimeter Area No match CHOICES: A) 15.6 feet B) 4.6 feet C.) 14.72 sq. feet D). 15.6 sq. feet E). 3.2 feet

143. ## Maths A

For this question, use the copy of the Random Number table provided at the end of this AAT. (This table was copied from page 111 in the Textbook.) Select 48 values according to the following criteria. o The first thirty (30) numbers must lie in the range

144. ## PHYSICS

Two objects (m1 = 4.90 kg and m2 = 2.75 kg) are connected by a light string passing over a light, frictionless pulley as in the figure below. The 4.90-kg object is released from rest at a point h = 4.00 m above the table. (a) Determine the speed of each

145. ## Physics

The wire in the drawing carries a current of 13 A. Suppose that a second long, straight wire is placed right next to this wire. The current in the second wire is 28 A. Use Ampere's law to find the magnitude of the magnetic field at a distance of r = 0.76 m

146. ## math

if a jacket cost 24\$ each, and sells them at 175% increase in price, what is the price of the jacket?

find the total amount due on a loan of N80,000.00 at 18percent simple interest at the end of 4months. (2)question is find the total amount due on a loan of N600,000.00 at 12percent simple interest at the end of 3years. Pls i need answer

148. ## Math

Teresa had a family photo with the dimensions of 12 inches by 16 1/2 inches. What is the area of the photo in square inches? Please help!!! :(

149. ## Statistics

Problem 1 The distribution of ages in the United States in the year 2010 is given below. Intervals include the left endpoint but not the right; the number of people aged 100 or more was not zero but it was so small that it makes no difference to the table.

150. ## Maths

For this question, use the copy of the Random Number table provided at the end of this AAT. (This table was copied from page 111 in the Textbook.) Select 48 values according to the following criteria. o The first thirty (30) numbers must lie in the range

151. ## physics

A pick up truck travelling at constant speed begins to accelerate at 1.5m/s squared for 6 seconds, by which times it has reached a speed of 20m/s. What was its original speed?

152. ## math

elbert wants to plant grass his yard is rectangle that's 6 meters by 7 he plans to use a cup of seed for every square meter in his yard how many cups of grass seed will he need

153. ## Math

What the next number should be? 6 18 20 10 30 32 16

154. ## math

A gardener wants to use 62 feet of fencing to enclose a rectangular shaped garden. If its length is 4 feet longer than twice its width, find the width of the garden

155. ## math

In order for you to put down new sod in the front yard you will need 5400 pieces of sod. Each sod piece is cut into one foot squares. If your yard is 60ft wide , how long is the yard.?

156. ## physics

A cyclist has a final velocity of 30 m/s after coasting down hill for 2 seconds. If the cyclist underwent a constant acceleration of 7.5m/s2 during the descent, what was his initial velocity at the top of the hill?

157. ## chemistry

What is the limiting reagent for 6HCl + Fe2O3 = 2FeCl3 + 3H2O ? 6HCl has 18.44 moles and Fe2O3 has 2.91 moles. Also how many moles would FeCl3 produce?

158. ## Math

graph the data in each table Perimeters of Similar Rectangles x 1 2 3 4 5 P ? ? ? ? ? Graph P 40 30 20 20 0 1 2 3 4 5 6 7 8 9 X Area of Similar Rectangles X 1 2 3 4 5 A ? ? ? ? ? A 40 30 20 10 0 1 2 3 4 5 6 7 8 9 X 1st rectangle is one side x bottom 2x

159. ## math

Vicki is contemplating consolidating her federal student loans with Loan Consolidation Experts Inc. She currently pays five separate federal loans totaling \$30,000 in principal at 4.5% simple interest for 20 years. Loan Consolidation Experts Inc. is

160. ## science

While rearranging a dorm room, a student does 287 J of work in moving a desk 2.5 m. What was the magnitude of the applied horizontal force?

161. ## chemistry

A photon with a wavelength (λ) of 3.091 x 10–7 m strikes an atom of hydrogen. Determine the velocity (in meters/second) of an electron ejected from the excited state, n = 3.

162. ## physics

A small drop of water is suspended motionless in air by a uniform electric field that is directed upward and has a magnitude of 12300 N/C. The mass of the water drop is 4.71 × 10-9 kg. How many excess electrons or protons reside on the drop?

163. ## science

if solubility of ammonium chloride is 55 at 60 degree celsius,.What is the amount of ammonium chloride dissolved in 40 gram of saturated solution at that temperature ?

164. ## physics

The infamous German "Paris gun" was used to launch a projectile with a flight time of 170 s for a horizontal distance of 122 km. Based on this information, and ignoring air resistance , calculate (a) the gun's muzzle speed and (b) the angle, measured above

165. ## science

Describe the events that take place in the movement of fluid in the capillary beds. What forces are involved in the movement of fluid out of the capillaries and back in again? Where in the capillary does movement take place? What is the role of the

166. ## math

Write as an improper fraction 2 4/5 is it 14/5

167. ## math

Myra's bulletin board has a width of 60 inches. When she originally decorated it she needed 192 inches of border material. How many inches high is the bulletin board?

168. ## chem

Solid calcium hydroxide, Ca(OH)2, is dissolved in water until the pH of the solution is 10.23. What is the concentration of calcium ion [Ca 2+ ]?

169. ## English

Commas: Do I need a comma between the words notes and so? - "Sitting at the sticky, crumb-covered cafeteria table, Luther and Ruth carefully studied their chemistry notes so that Dr. Wilson's next tricky test wouldn't confuse them." Do I need a comma

170. ## us history

As a result of the War of 1812, the United States

171. ## Chemistry

At the temperature of 30degree C and pressure of 1*10^5 pa, 30dm3 of H2 gas is burned with 30dm3 of O2 gas in a container of 60dm3. Calculate the pressure different after the complete combustion and cooling upto 30degree C again.

172. ## language arts

The narrator plays in dark and shadowy streets; his light is Mangan's sister. Examine the way he describes her, the feelings he has for her, and the language he uses to narrate his account of his devotion to her. What is the meaning of the inclusion of the

173. ## chemistry

Which atom or ion would you expect to have the smallest radius? Ne F- Na+ Ne-

174. ## Physics

One component of a magnetic field has a magnitude of 0.0445 T and points along the +x axis, while the other component has a magnitude of 0.0725 T and points along the -y axis. A particle carrying a charge of +1.01 × 10-5 C is moving along the +z axis at a

175. ## geometry

ABCD is a parallelogram. E is a point on AB such that 234×AE=EB. Let DE intersect AC at F. What is the ratio AC:AF?

asked by can u do it????
176. ## Algebra

Find the total amount if you deposit \$500 at a rate of 5% for two years using simple interest. For year one For year two I started with \$500. for year one and \$525. for year two and added the interest and ended up with 551.25 - and I was wrong...can

177. ## physics(electricity)

A 9V battery has an electric potential difference of 9V between the positive and negative terminals. How much kinetic energy in J would an electron gain if it moved from the negative terminal to the positive one?

178. ## physics

What is the difference between vector and a scalar quantity?

179. ## World History

History and Geography Activity 12 what page is this on?

180. ## biology

Why are the subclavian vein and subclavian artery positioned where they are relative to each other?

181. ## ENGLISH

Which of the following is CORRECT? a. He pulled out a gun and shot the prowler. b. He pulled out a gun, and shot the prowler. c. He pulled out a gun; and shot the prowler. d. He pulled out a gun: and shot the prowler.

182. ## calc 2

A computer takes 2 seconds to compute a particular definite integral accurate to 4 decimal places. Approximately how long does it take the computer to get 12 decimal places of accuracy using each of the LEFT, MID, and SIMP rules? Round your answers to one

183. ## Math

Measurements: Length = 5 cm Width = 18 cm Height = 26 cm ____________________________________________ Calculate the surface area of the prism. Formula: Calculate the volume of the prism Formula: Calculate the volume of the prism as if it were a pyramid.

184. ## Math

48000 people voted in the last election in the town of Southboro. If only 55% of the registered voters voted in the last election, how many people are registered to vote? I got 87,273 Nik put \$264 in a savings account that pays 3% annual interest. How much

185. ## Chemistry

Nitrocellulose lacquer is used as a protective coating on wood. What mass of nitrocellulose is contained in one gallon (3.8L) of lacquer that is 5.1% nitrocellulose by mass? The density of the lacquer is 0.79 g/mL.

186. ## Finance

In February 2011 the risk-free rate was 4.50 percent, the market risk premium was 7.00 percent, and the beta for Dell stock was 1.50. What is the expected return that was consistent with the systematic risk associated with the returns on Dell stock

187. ## Statistics

Problem 5 In a histogram of lengths measured in millimeters, the height of the 20-40 bar is 1 percent per millimeter. If I measure all the lengths in centimeters instead, then the corresponding bar would be labeled 2-4. : 5.0 points The height of this bar

188. ## Math

Denna bought a bag of jelly beans. 1/3 are pink and 1/6 are blue. The rest are green. How many are green?

189. ## math

Vicki is contemplating consolidating her federal student loans with Loan Consolidation Experts Inc. She currently pays five separate federal loans totaling \$30,000 in principal at 4.5% simple interest for 20 years. Loan Consolidation Experts Inc. is

My question is about the story a midsummer nights dream, in act one 1. Why does helena wish her 'tongue should catch(hermia's) tongue's sweet melody'(189)

191. ## Phi

"You didn't like that book; so you probably don't like to read" is a weak inductive argument. a strong deductive argument. not an argument. a valid inductive argument.

192. ## Statistics

Is it appropriate to call the numbered lock combination in our doors and drawers a "combination?" Explain.

193. ## chemistry

What is the osmotic pressure, expressed in the unit mmH2O, of a solution containing 125 ug of vitamin B12 (C63H88CoN14O14P) in 2.50 mL H2O at 25 degrees C? Answer: 9.33 mmH2O

194. ## Physics

An automobile with 0.80-m diameter wheel starts from rest and accelerates uniformly to 22 m/s in 0.7 s. Through how many revolutions does the front wheel turn during this period?

195. ## Staistcs

Problem 4 Refer again to the distribution table in Problem 3. : 3.0 points Each part is worth 1 point. a) In the United States, high school diplomas are awarded after 12 years of schooling. Which interval contains the adults who had completed 12 years of

196. ## Lang. Arts

“[H]er coffee-and-cream neck” is an example of what type of figurative language? A. personification B. symbol C. simile D.metaphor I think it is D...?

197. ## Titleing

For a project for Black History Month we have to put a creative or catchy title. For example: Jackie Robinson: A Hero Serena Williams: #1 tennis player Micheal Jackson: King of Pop What should I put for William Edward Du Bois?

198. ## Financial Managment

You are the president and chief executive officer of a family owned manufacturing firm with assets of \$ 45 million. The company articles of incorporation and state laws place no restrictions on the sale of stock to outsiders. An unexpected opportunity to

199. ## Math

Write the expression 2/3sqrt(80)in its simplest radical form A/Bsqrt(C), where A,B, and C are all integers. Answer: A=_______, B=_______,and C=_____

200. ## Chemistry

A solution containing 0.100 mol of Na2CO3 and 0.100 mol of NiCl2 is allowed to react. What mass of precipitate forms in this reaction? I just don't understand how to get the answer. Can someone please show me and explain to me how to do this.

201. ## physics

A shot-­‐putter releases the 16 lbs. shot at an angle of 41 degrees. If the shot travels a horizontal distance f 34 m to reach its peak at midflight, how high did the shot go and what is the displacement of the resulting vector at midflight?

202. ## geometry(triangle)

Triangle ABC is a right triangle with ∠ABC=90∘. P is a point within triangle ABC such that ∠APB=∠BPC=∠CPA=120∘. If PA=15 and PB=6, what is the value of PC?

asked by can u do it????
203. ## bio

Why do you suppose the subclavian vein and subclavian artery are positioned where they are related to one another?

204. ## Life orienation

What can thembi do to deal with the unthical behaviour

205. ## Algebra 2

After one month at a new job you decide to save \$50. Each month you plan to increase your savings by five dollars. a.)Write an explicit formula to model the amount you will save each month. b.)How much will you save in the seventh month?

206. ## Algebra 2

Because of friction and air resistance, each swing of a pendulum is a little shorter than the previous one. The lengths of the swings form a geometric sequence. Suppose the first swing of the pendulum has an arc length of 100 cm and a return swing of 99

207. ## physics

Sam tosses a ball horizontally off a footbridge at 4.8 m/s. How much time passes after he releases it until its speed doubles?

208. ## Math

You have 34 math and science problems for homework. You have 10 more math problems then science, how many of each do you have?

209. ## chemistry

What are the two properties of carbon which lead to the huge number of carbon compounds we see around us ?

210. ## health

When a person has episodes of hypomania that shift back and forth with mild depression for at least two years, he or she has what form of bipolar disorder? A. BP-NOS B. Cyclothymic Disorder C. Bipolar I Disorder D. Bipolar II Disorde A?

211. ## Statistics

Problem 4 Refer to the box plots in Problem 3. : 4.0 points Compare experiments 4 and 5. When drawn on the same scale, the histogram for one of them has a noticeably higher peak the histogram for the other. From the box plots alone, can you tell which one

212. ## America Gov't

According to Thomas Hobbes, in the "state of nature" every person had complete _____.

213. ## Math

The expression (16xy^2/-24x^3y)^-3 may be simplified into the form A/B where none of the factors of A and B are raised to a negative power. Answer: A = _______ and B = ________

214. ## math

what is 45 times 2

1. These two technological advancements of the Industrial Revolution helped lead to the development of Impressionism. A. the railroads and the printing press B. the railroads and photography C. photography and electric lighting D. the automobile and

216. ## Algebra

Find the quotient and remainder when: (x+1)+(x-1) divided by [1-(x+1)(x-1)]

217. ## Maths A

Select 48 values according to the following criteria. o The first thirty (30) numbers must lie in the range from 48 to 58 inclusive. o The next ten (10) numbers must lie in the range from 30 to 70 inclusive. o The remaining eight (8) numbers must lie in

218. ## Grammar

What is the simple subjects in the sentence Maria is my cousin

219. ## math

kevin had fifteen marbles, he lost 1/5 of them how many marbles did he loose?

220. ## Life orientation

What unethical behaviour is taking place in case study name two

221. ## health

What is atmospheric pressure? A. Pressure of the air inside the body B. Pressure of the air outside the body C. Pressure of the air within one’s mouth D. Pressure of the air within one’s lungs i think its D

222. ## us history

What amendment addressses the power balance between the national government and states? a)First b)Second c)Fourth d)Sixth e)Tenth

223. ## Social Studies

The Bush and Adams families are not the only families from which related U.S. presidents have come. Which family boasts grandfather-grandson presidents? 1. Harrison 2. Lincoln 3. Madison 4. Roosevelt

224. ## math

sol: measuere angle A plus measure angle B plus measure angle c plus measure angle d equals 360. 60+x+3x+2x equal

225. ## Algebra

Need help with two questions. I've been stuck on them for a while now. 1) Find a general form of an equation of the line through the point A that satisfies the given condition. A(−2, 5) slope 3/4 2)Find a general form of an equation of the line through

226. ## Stasistics

Here is the distribution of educational level of adults aged 25 and over in the United States in the year 2012. Intervals include the left endpoint but not the right. You can define "17+" to mean "17 to 22." The percent with 22 or more years of education

227. ## math

Isaiah and Chakshu went to dinner at Chili's restaurant and received a bill for \$35. Isaiah paid the bill along with an additional 20% tip on his charge card. What was the total amount that he put on his charge card?

228. ## math

Sonja needs to borrow \$2,251 to pay for her college classes. Sallie Mae is offering her a 4.5% simple interest loan with an interest charge of \$405.18 over the life of the loan. How many years is Sallie Mae giving her to pay back the loan with interest?

229. ## MATHS A

A tyre manufacturer has chosen 48 tyres at random from a production line and issued them to taxis for testing. Assume that the 48 numbers you have selected refer to the number of thousands of kilometres travelled during the life of each tyre. (For example,

230. ## Math

Is it appropriate to call the numbered lock combination in our doors and drawers a "combination?" Explain.

231. ## Lang. Arts

Which of the following sentences uses commas with appositives correctly? A.Mr. Van Daan’s son, Peter, spent a lot of time with Anne. B.Margot, Anne’s sister is the oldest. C.Miep the one who helped them, stopped coming. D.Mrs. Van Daan the selfish

232. ## english

Where will I put the quotation in the sentence: I said that I might have left my book in Math class.

233. ## Algebra

A large cube is formed by using many small 1"x1"x1" cubes. Once the large cube is formed, all the outside faces are painted. There are now exactly 27 small cubes that do NOT have any paint on any face. How many 1"x1"x1" cubes were used to form the large

234. ## math

In Chicago, the tax on a property assessed at \$550,000 is \$7,700. If tax rates are proportional in this city, how much would the tax be on a property assessed at \$920,000? write a proportion to solve the question.

235. ## algebra!

Find the number of pairs of coprime integers (n,m) such that 1≤n≤m≤20.

236. ## Applied Calculus

Find the x-value of the relative minima of the function: 2x^(2)+((256)/(x))+8

237. ## college algebra

Transformation of ty then transformations of the graphs y=x^2or y=|x| to sketch a graph of f by hand. f(x)=2|x-6|-4

238. ## Math

Use the discriminate to determine the number of real solutions of the equations. 7^2-2x+1

239. ## algebra

How many pairs of integers (not necessarily positive) are there such that both a2+6b2 and b2+6a2 are both squares?

240. ## Statistics

Out of 4 architects, 6 engineers and 9n electricians, how many ways can a group of 6 people be formed to attend a forum if there are at least 3 electricians?

241. ## Math

Ricardo is making a photo collage from small photos of himself and his friends. He printed each photo as a 1-inch by 1-inch square. He wants the perimeter to be 16 inches and have the greatest possible area. What should the dimensions of the collage be.

242. ## Chemistry

A crystalline white solid is a mixture of glucose (C6H12O6) and sucrose (C12H22O11). Is it possible that a 10.00 g sample of the solid dissolved in 100.0 g H2O might have a freezing point of -1.25 degrees C? Explain. Answer: No. The freezing point would be

243. ## Algebra

57 + X - 13 = 202 - 13

244. ## math

According to a USA Today Gallup poll, there is a racial divide on views of the Trayvon Martin/George Zimmerman case in Sanford, FL. The poll showed that 73% of blacks polled believe George Zimmerman would have been arrested if Trayvon Martin was white,

245. ## Chemistry

at a pressure of 390.0 kPa, a sample of ideal gas containing 110. moles of propane is collected at a tempature of 55 degrees celcius. find the volume of the propane tank used

246. ## psychology

Describe a hypothesis related to the area of psychology in which you are predicting an interaction. Describe the specific nature of the interaction (how different levels of each independent variable work together to produce different outcomes) and why you

247. ## math

A speed boat is travelling from Florida to Cuba (distance of approximately 380 km), it is directly affected by the water current. Thus, the actual speed of the boat with respect to the ground is the speed of the boat (125 km/h) plus the water current

5z^8/3+4z^5/3-12z^2/3=0

249. ## physics

Three resistors, 1.17, 2.84, and 3.65Ω, are connected in series across a 20.3-V battery. Find the power delivered to each resistor.

250. ## physics

Three resistors, 1.17, 2.84, and 3.65Ω, are connected in series across a 20.3-V battery. Find the power delivered to each resistor.

251. ## port charlotte high

2Nacl +2HCL = 2NaCl + H2 what mass of sodium is required to react with 8.45g of HCl

252. ## algebra

How many pairs of integers (not necessarily positive) are there such that both a2+6b2 and b2+6a2 are both squares?

asked by i could not do it can u??
253. ## algebra

Find an integer value of x such that when 3x−39 is divided by 2x, the quotient is 1 and the remainder is 50.

asked by i could not do it can u??
254. ## physics

A freestyle skier hits the take off ramp with an initial velocity of 17.5 m/s with a purely vertical take off (90 degrees). What is the peak height that the skier will reach?

255. ## physics

at a hight of 3900m,an airfore bomber maintains a constant velocity 1200km/hr toward a point directly above its target.calculate the angle of sight at which the plane should release a bomb to strick the target. take g-10m/s square.

256. ## Maths A

A tyre manufacturer has chosen 48 tyres at random from a production line and issued them to taxis for testing. Assume that the 48 numbers you have selected refer to the number of thousands of kilometres travelled during the life of each tyre. (For example,

257. ## College Algebra help please

I don't understand this. The question is use the remainder theorem to evaluate P(x) as given. 1. P(x)=3x^3+11x^2+2x-16 and it gives me P(1/3)

258. ## geometry

there are 4 cirlces in an equilateral triangle with sides equal to 16cm. what is the radius of the big circle and the little circles

259. ## Algebra 2

4.)A diamond is purchased for \$3500. Its value increases 5% each year. Find the value of the diamond after six years.

260. ## pre-calculus

tangents are drawn from the point (-4,0) to the circle x^2 +y^2 =1. find the slopes of the tangent.

262. ## college general chemistry

calculate the lowest whole number ratio of Moles of Mg/moles of O average of Moles of Mg/Moles of O Trial 1 mass of empty crucible and lid= 36.560 mass of Mg=0.348 mass of crucible, lid, and product=38.229 Trail 2 mass of empty crucible and lid=32.221 mass

263. ## algebra

Find the number of pairs of coprime integers (n,m) such that 1≤n≤m≤20.

264. ## rectangle

A rectangle has perimeter equal to 28, what is the maximum possible area of this rectangle.

asked by i could not do it can u??
265. ## math

A bag has 6 green marbles and 4 orange marbles.Find the least number of marbles of either color you would add to make the probability of picking an orange marble

266. ## Statistics

Problem 7 Refer again to the table in Problem 6. : 3.0 points Fill in the value of the missing entry.

267. ## Chemistry

at a pressure of 390.0 kPa, a sample of ideal gas containing 110. moles of propane is collected at a tempature of 55 degrees celcius. find the volume of the propane tank used

268. ## maths a

The Bough and Bud Company combined an insect spray with a growth hormone to produce the MOP (More Oranges Production) Treatment, which was expected to increase the number of oranges produced by each tree. The data below shows the number of oranges produced

269. ## math

To be eligible for a car loan, Melissa's monthly rent and utilities cannot exceed 30% of her take-home pay. Use the information below to determine whether Melissa is eligible for the loan. Gross paycheck-\$3950 Net paycheck (after taxes)-\$3260 Rent-\$925

270. ## chemistry

What groups would be ionized in a solution of pH 12

271. ## maths-Circles

O is the centre of a circle which has two chords BA and BC with point B on the circumference of the circle.If OB bisects angle ABC,prove that AB=AC

272. ## Math

Rewrite the following using a single exponent. a^7b^7 = (____)----

273. ## Physics

A charge-Q is located at x=-l/2 and a charge +Q is located at x=l/2 . Thus the separation between the two charges is l . The total electric field on the x axis can be written as E(x)=E(x)d^ (a) What is the direction d^ of the total electric field at any

274. ## physics

For a safe re-entry into the Earth's atmosphere the pilots of a space capsule must reduce their speed from 2.6 104 m/s to 1.0 104 m/s. The rocket engine produces a backward force on the capsule of 1.7 105 N. The mass of the capsule is 3800 kg. For how long

275. ## Physics

There is a very large horizontal conducting plate in the x-y plane (consider it infinitely large). Its thickness is h . The charge densities on the upper and the lower surfaces are both equal to +σ. The goal of this problem is to find the electric field

276. ## math probability

maria thinks she has a 7 out of 10 chance of getting an A in Science, and an 85% chance of getting an A in math. Assuming these are independent events, what is her proability of getting an A in both classes?

277. ## geometry

The hypotenuse is x+5 and the legs are 16, and 7 so how would you use the pythagorean theorem.

278. ## chemistry

Determine the minimum electric potential difference (in volts) that must be applied to accelerate an α-particle so that on interaction with a hydrogen atom, a ground state electron will be excited to n = 6.

279. ## chemistry

Calculate the wavelength of a photon with energy 2.45 eV.

280. ## physics

A skater rotates 760 degrees clockwise, stops, and rotates counterclockwise for 340 degrees. What is her angular distance? Angular displacement?

281. ## physics

A softball bat is rotating at 460 rotations per minute at contact with the ball. What is the angular velocity in radians?

121y^2-196=0

283. ## science

What is the term used to describe making older buildings more resistant to earthquakes?

284. ## physics

A negative acceleration is sometimes called a deceleration. What is the acceleration of a water rocket launched at 25m/s if it reaches its maximum height at 2.5s? (Note its speed at maximum height is zero!)

285. ## Chemistry

A solution containing 0.100 mol of Na2CO3 and 0.100 mol of NiCl2 is allowed to react. What mass of precipitate forms in this reaction? I think I know how to do it but don't understand. Do I figure out the mass of each of the compounds? HELP please!!!

286. ## math

factor the expression completely. 15x^2+100x+125

287. ## Life orientation

What according to the basic conditions of employment act applies with regard to the contraventions that you've identified?

288. ## algebra 1

you toss a coin 3 times. what is the probability that you get heads 0 times. is it 1/6 or 1/8

289. ## college general chemistry

calculate the lowest whole number ratio of Moles of Mg/moles of O mass of empty crucible and lid= 36.560 mass of Mg=0.348 mass of crucible, lid, and product=38.229

290. ## algebra

Find an integer value of x such that when 3x−39 is divided by 2x, the quotient is 1 and the remainder is 50.

291. ## rectangle

A rectangle has perimeter equal to 28, what is the maximum possible area of this rectangle.

292. ## art apreciation

Imagine that you are a defense attorney for this work of art. Support your argument with research.

293. ## Math

Simplify t raised to the power -4. (t-4) 3r-5. s-3/t-5

294. ## Math

Write as an improper fraction 2 4/5 Is it 14/5

295. ## Math

THe ratio of the number of students who own an ipod to those who do not own an ipod is 7 to 8. There are a total of 45 students. How many students in the class do not own an ipod?

296. ## Statistics

Here is a distribution you have seen before, in Exercise Set 2. It is the distribution of ages in the United States in the year 2010 is given below. Intervals include the left endpoint but not the right; the number of people aged 100 or more was not zero

297. ## Algebra

(W + 9) X 4 = 27 + 4 ?

298. ## Stastics

Look again at the distribution of ages in Problem before. : 2.0 points Each part is worth 1 point. a) About what percent of the people were in their thirties? Round your answer to one decimal place. unanswered b) A common (though not universal) definition

299. ## Stastistics

Look again at the distribution of ages in Problem 1. : 2.0 points Each part is worth 1 point. a) About what percent of the people were in their thirties? Round your answer to one decimal place. unanswered b) A common (though not universal) definition of

300. ## math

The Bermuda Triangle, known for its disappearance of ships since 1950, has a base between Miami and Puerto Rico, which is about 1000 miles. Its height is between the Bahamas and Bermuda, which is also about 1000 miles. Find the area covered by the Bermuda

301. ## math

In March of 2012, GM reported a 12% increase in number of vehicles sold compared to March of 2011. If the total number of vehicles sold by GM in March of 2012 was 231,000, how many vehicles were sold in March of 2011?

302. ## Math

Use properties of exponents to re-write the expression using positive powers: x^6y^-6 = ________

303. ## Math

Simplify the expression, reporting final answer using positive power: 4x^-3 y^-2 z^-5/-20x^-5 y^8 z^6 = ______

304. ## Physics

There are two conducting concentric hollow spheres of outer radii R2 and R1 ( R2>R1 ). The thickness of the material of both spheres is d . The inner sphere is negatively charged with charge density -σ1, . The larger sphere is positively charged with

305. ## math

If Kimberly walks 5 miles in 40 minutes, then Kimberly will walk how far in 110 minutes?

306. ## edu

Which one of the following requires a child's coordination with speech and movement? A. Puppet play and storytelling B. Finger plays and flannel boards C. Flannel boards and storytelling D. Finger plays and puppet play I think (D.) Am i correct

307. ## Algebra

Find the quotients and remainder when: 4a^2 + 9b^2 + 25c^2 - 12ab + 20ac - 30bc divided by 2a - 3b + 5c

I am having trouble with Input output for this problem, I can't figure out the function rule input x= output y= 2 1 3 0 4 -1 Please Help!

309. ## Simple economics question

what are three examples of an oigopoly; what are three examples of a monopolistic competition? thank you!

310. ## physics

In order for a ski jumper to attain maximum projectile distance she must reach a velocity of 30m/s. of the runway of the takeoff ramp is 70m long, how quickly ust she accelerate?

311. ## Algebra

solve 2x^2-5x-1 divided by x-3

Unable to help my child with this problem... 71.33=9/5k-459.67 solving for k

313. ## physics

Recently, Asteroid 2012 DA14 came within 34,200 km from the center of the earth at its point of closest approach. If the moon goes around the earth once every 27.5 days, what is the ratio of the distance of closest approach of DA14 to the radius of the

314. ## math

kevin had fifteen marbles, he lost 1/5 of them how many marbles did he loose?

315. ## Applied Calculus

If the line passing through the points (a, 1) and (−8, 7 is parallel to the line passing through the points (−11, 8) and (a + 2, 1), what is the value of a?

316. ## literacy

Which of the following will probably contain the most objective data? a. An editoral in The Washingtin Post b. A lettet redutting an article in a medical journal c. A memoir about working in a coalmine d. A report with charts documenting hourly wage rates

317. ## Math

how to write 2y + 5x = 12 in function form

318. ## MATH

factor y^3+y^2-4x-4 and t^2+4z^2

319. ## math

you toss a coin 3 times. what is the probability that you get heads 0 times. is it 1/6 or 1/8

320. ## algebra

a,b and c are real numbers such that ab=44, bc=112 and a+c=13. What is the value of b?

321. ## math

A jar had 16 marbles 4 are red . One marble is drawn and not replaced. Then s second marble is drawn . What is the probability of selecting a red marble and then another red marble?

322. ## algebra

Find an integer value of x such that when 3x−39 is divided by 2x, the quotient is 1 and the remainder is 50.

323. ## math

How many 3/10 centimeters segments are in 6 and 4/5 centimeters

324. ## Chemistry

if a gas is initially at 1.5 atm of pressure, Occupies a volume of 3.0 L at a tmepeature of 293K, what will be the new volume if the pressure increases to 2.5 atm and is now at 303K?

325. ## health

Skeletal muscles have an abundant supply of ________.

326. ## math

My new TV has a perimeter of 164 inches. Its width is 8 inches less than twice the height. How many inches wide is the TV?

9\9-1/3

328. ## math

The American flag has a width of 15 feet and a length of 5 feet less than twice the width. Determine the amount of square feet of fabric required to make an American flag?

329. ## Maths

What is d nth term and d last two terms of d sequence: (a) 0^1,2^2,24^3,252^4. (b) 1,1,2,4,7,13,24. (c) 0,1,2,3,6,11

330. ## Geography

A case study on coastal management..... 300 words or more please ;[

331. ## math

The United States Department of Agriculture reports that 15% Americans are now on food stamps. If there are about 300 million Americans, how many millions of people are on food stamps?

332. ## Algebra II

2y^11/3+8y^8/3-10y^5/3=0

333. ## math

mary color a picture with colored marker. she used red 2 times blue 3 times yellow 6 times orange 1 time and green 1 time. what fraction of the time did mary use yellow?

334. ## Algebra

In a Quadratic function if -b=-2 and 2a=2/3 do you eliminate the two and x equals negative three or... What would x end up being?

335. ## Math

My question is about calculating simple interest. How do you find the principal, rate, time,or interest when solving such problems?

336. ## Chemistry 132

What is the net ionic equations for Ca Cl2 + Na2 CO3=Ca CO3 + 2Na Cl

337. ## survey of mathematics

Search the internet to find a current article (published within january or february 2013 ) that provides statistical information relating to public policy and which you think is misleading. Explain why you feel the statistical information is misleading.

338. ## physics

A soccer ball with a mass of 415 g bounces off the crossbar of a goal and is deflected upward at an angle of 57° with respect to horizontal. Immediately after the deflection, the kinetic energy of the ball is 47 J. What are the vertical and horizontal

339. ## algebra 1

6! -- 5! i don't understand this why does it have ! in this question?

340. ## algebra

a,b and c are real numbers such that ab=44, bc=112 and a+c=13. What is the value of b?

asked by i could not do it can u??

Mrs. Reese set up language centers in her room. Which one of the following should she not do in these centers a. Engage a large group of children in the flannel board story "The Lion and the Mouse" b. Write down Jimmy's story about his birthday c.Read the

342. ## math

Square digits

343. ## math

Can you explain how I find the values so I can plot a graph of T=(25 ln24/ln) -(25/ln2) ln M

-4x+3y=-7

345. ## Staistics

Problem 3 John Tukey, the mathematician who came up with the idea of the stem and leaf plot, developed several other methods that were brilliant combinations of simplicity and effectiveness. One such is the box plot, also known as a box and whisker plot.

One of the disadvantages of a sole proprietorshipis?

347. ## math

Find the solution of the exponential equation 7+(5^5x)=25 correct to at least four decimal places.

348. ## Math

Thanks for helping me alot Steve i really appreciate ur help. My test is in 2 hours and I think im prepared im really thankful of you:) Thanksss sir!!!:D

-12 -(-8)

350. ## Math

Out of 4 architects, 6 engineers and 9n electricians, how many ways can a group of 6 people be formed to attend a forum if there are at least 3 electricians?

351. ## math

solve the equation z7=1

352. ## Math

Kim is researching the number of channels available from different cable and satellite companies what would be an appropriate graph to use : A. Line plot B. line graph C.bar graph D.frequency table E. pictograph PLEASE HELP!!!!

354. ## math

5^2-25/s^2-25=

355. ## logic

how to disconfirm chickens cannot fly

Is 3/9 ,= to 9/14?

357. ## Calculus

show that e^-x ¡Ö 1-x near x=0

358. ## math

if n= 44, what is the value of 75-n+ 6?

359. ## math

Find the sum of 2 1/2 and 3 1/3 B) Subtract your answer in part (A) from 9