1. Geometry

Kristen lives directly east of the park. The football field is directly south of the park. The library sits on the line formed between Kristen’s home and the football field at the exact point where an altitude to the right triangle formed by her home,

2. Physics

Figure (a) shows charged particles 1 and 2 that are fixed in place on an x axis. Particle 1 has a charge with a magnitude of |q1| = 12.0e. Particle 3 of charge q3 = +13.0e is initially on the x axis near particle 2. Then particle 3 is gradually moved in

3. Geometry

A triangle has side lengths of 18 cm, 80 cm, and 81 cm. Classify it as acute, obtuse, or right.

4. Physics 2

A 10 g bullet is fired into, and embeds itself in, a 2 kg block attached to a spring with a force constant of 19.6 n/m and whose mass is negligible. How far is the spring compressed if the bullet has a speed of 300 m/s just before it strikes the block and

5. physics

Two cars cover the same distance in a straight line. Car A covers the distance at a constant velocity. Car B starts from rest and maintains a constant acceleration. Both cars cover a distance of 487 m in 216 s. Assume that they are moving in the +x

6. chem

the solution with the lowest pH is A. 1.0 M HF B. 1.0 M HCN C. 1.0 M HCOOH D. 1.0 M CH3COOH and how did you find it?

7. Math 5th

4/7 of a group of children are boys. If there are 18 more boys than girls, how many children are there altogether?

8. Calculus AB

A particle is moving along the x-axis so that at time t its acceleration is a(t)=ðcos(ðt) At time t=1/2, the velocity v of the particle is 1/2. Find the velocity of the particle at any time t. I think I got that right, as sinðt + C. Now it wants the

9. Math

The area of a circle is 16π cm2. What is the circle's circumference? 2π cm 4π cm 8π cm 16π cm

10. Physics

Figure (a) shows charged particles 1 and 2 that are fixed in place on an x axis. Particle 1 has a charge with a magnitude of |q1| = 12.0e. Particle 3 of charge q3 = +13.0e is initially on the x axis near particle 2. Then particle 3 is gradually moved in

11. Math

What is the area of a parallelogram with a 60 degree angle and length of 6cm and side 8cm

12. geometry

Quadrilateral QRST is a square. If the measure of QR is 3x – 6 and TS is 6 - x. Find the area of the square.

13. physics

The longest distance in a track and field event is the 10 km run. The record holder for the women's 10 km run is Wang Junxia of China. Assuming that Wang Junxia ran a distance of 10.00 km with an average speed of 5.644 m/s, what was her time? (Hint: Need

14. Chemistry

What is the mass of 65.0mL of ethanol? the density of ethanol at room temperature=0.789g/mL

15. Chemistry

Suppose 24.9 grams of copper (II) nitrate is dissolved in 200. milliliters of a 0.70 moles/liter aqueous solution of sodium chromate. Calculate the final molarity of nitrate anion in the solution.

16. Chemistry

large dose of vitamin C are supposed to cure the common cold. One commercial over-the-counter product consists of 500-mg tablets that are 20% by weight vitamin C. How many tablets should one take for a 1.30g dose of vitamin C?

teh density of copper is 8.92 g/cm3. If you plotted the mass of copper in grams versus the volume in cubic centimeters, what would the slope of the line be?

18. physics

(a) Just for fun, a person jumps from rest from the top of a cliff overlooking a lake. In falling through a distance H, she acquires a certain speed v. Assuming free-fall conditions, how much farther must she fall in order to acquire speed 2v? Express your

19. physics

PLEASE HELP ME SOLVE !!!! InMay 1998, forest fires in southernMexico and Guatemala spread smoke all the way to Austin. Those fires consumed forest land at a rate of 26900 acres/week. On the average, how many square meters of forest are burned down every

20. english

27. In the story “In the Shadow of War,” why did Omovo refuse money from the soldiers?

21. physics

The magnitudes of the four displacement vectors shown in the drawing are A = 15.0 m, B = 11.0 m, C = 12.0 m, and D = 21.0 m. Determine the magnitude and directional angle for the resultant that occurs when these vectors are added together.

22. calculus

Find the limits Lim(sin kt/t) t approaches 0 and (K is constant) How do you start this and go about it stepwise? Does knowing (K constant) help me to solve this?

23. Physics

A test tube standing vertically in a test tube rack contains 2.4 cm of oil, whose density is 0.81 g/cm^3 and 6 cm of water. What is the gauge pressure on the bottom of the tube? The acceleration of gravity is 9.8 m/s^2. Answer in units of Pa

1)Which thermochemical equation and data does not agree with the other two written? a) 2NO (g)+ O2 (g) ->2 NO2 (g) deltaH=-169.8 b) NO (g) + 1/2 O2 (g) -> NO2 (g) delta H = -56.6 c) 4 NO2 (g) -> 4 NO (g) + 2 O2 (g) delta H = +226.4 d)all three equations

25. math

Solve by the substitution method. What is the solution of the system? 3x+9y=48 -6x+y=56

26. chemistry

Suppose 24.9 grams of copper (II) nitrate is dissolved in 200. milliliters of a 0.70 moles/liter aqueous solution of sodium chromate. Calculate the final molarity of nitrate anion in the solution.

27. Math

The point A (-7, 5) is reflected over the line x = -5, and then is reflected over the line x = 2. What are the coordinates of A'? (7, 19) (10, 5) (7, 5) (10, 19) Question #45 MultipleChoice The vertices of an isosceles triangle are A(3, 6), B(7, 2), and

28. greek philosophy and history

what is the Socratic method???

29. Physics!!!

The electric field everywhere on the surface of a charged sphere of radius 0.260 m has a magnitude of 545 N/C and points radially outward from the center of the sphere. (a) What is the net charge on the sphere?

30. earth

Body on surface of earth weighs 400 lb. Radius of earth is about 4000miles. If same body were placed on 4000 mile high tower, what would its weight be

31. Math

There are twenty balls in the bag. Twelve are white, six are orange and two are pink. When I draw a ball from the bag, I remove it. What is the probability that my first draw is a white ball and my second is not?

32. chemistry

The highest temperature ever recorded in the United States is 134F at Greenland Ranch, Death Valley, CA, on July 13, 1913. What is the temperature on the Celsius and Kelvin scales?

33. chemistry

An element has ccp packing with a face-centered cubic unit cell. Its density is 1770 kg/m3 and the unit cell volume is 1.50 x 10-28 m3. Calculate the molar mass (g/mol) of the element to three significant figures.

34. physis

The magnitudes of the four displacement vectors shown in the drawing are A = 13.0 m, B = 11.0 m, C = 12.0 m, and D = 27.0 m. Determine the magnitude and directional angle for the resultant that occurs when these vectors are added together.

1. What effect would the following actions have on a firm’s current ratio? Assume that new working capital is positive. a. A short term bank loan is repaid. b. A long-term debt is paid off early. For a, would the current ratio move away from 1. For b,

36. physics

An isotope of iodine is I-126.how many protons, neutrons &electrons does it have

37. Physics!!!

The electric field everywhere on the surface of a charged sphere of radius 0.260 m has a magnitude of 545 N/C and points radially outward from the center of the sphere. (a) What is the net charge on the sphere?

38. Physics

A wooden block of mass 29.0 kg sits on a horizontal table. A wire of negligible mass is attached to the right side of the block and goes over a pulley (also of negligible mass, and frictionless), where it is allowed to dangle vertically. When a mass of

39. physics!!!

An electric field of intensity 4.27 kN/C is applied along the x-axis. Calculate the electric flux through a rectangular plane 0.350 m wide and 0.700 m long if the following conditions are true. (a) The plane is parallel to the yz-plane. (b) The plane is

40. physics

A de-orbit burn, similar to that presented in the previous math problem, has been performed. During this de-orbit burn a pre-calculated ∆V (delta V, change in velocity) of 290 ft/s (or 88.4 m/s) will be used to decrease the Shuttle’s altitude from 205

41. economics

While shopping you discover that your favorite department store has lowered the price on a hot, new MP3 player that you wanted to buy. You rush into the store, only to find that they are sold out. This scenario illustrates the concept of a) scarcity b)

42. very easy math question

i doing my physics work and so i have to convert 0.0023mm to meters and it seem so easy but i not know how. i first convert it to cm, i times by ten then i divide by 100 to give me meters so i get 0.0023m but it suppose to be 2.3*10^5 m

43. Physics

A skateboarder, starting from rest, rolls down a 12.5-m ramp. When she arrives at the bottom of the ramp her speed is 6.45 m/s. (a) Determine the magnitude of her acceleration, assumed to be constant.

44. physics

An 18-year-old runner can complete a 10.0 km course with an average speed of 4.58 m/s. A 50-year-old runner can cover the same distance with an average speed of 4.36 m/s. How much later (in seconds) should the younger runner start in order to finish the

A business wants to share its customer account database with its trading partners and customers, while at the same time providing prospective buyers with access to marketing materials on its Web site. Assuming that the business is responsible for running

46. Finite: College Math

A student wants to buy 3 CDs, but assume that there are 6 CDs featuring the piano, 4 CDs featuring the trumpet, and 7 CDs featuring the saxophone. In how many ways can the selection be made if CD's featuring at least 2 different instruments are selected?

47. Precalculus

Write the three cube roots of 8 cis (-30°).

48. trig

if you are riding on a ferris wheel that is 60 ft tall and it takes you 5 minutes to make 1 revolution, what is your linear velocity?

49. Precalculus

The figure shows part of a curve traced by a point on the circumference of a circle of radius 4 that rotates, without slipping, around a fixed circle of radius 2. The rotating circle starts with angle t = 0 radians and the point P (x, y) at (10, 0). In

50. Language

Homophones can be used humorously in riddles.The answer to each of the riddles below is a homophone groaner! a) What type of sandals do frogs like?Open_____. b)What is called when your rabbit is depressed? A bad_______day. c) What is the most important

51. Physics

A jetliner, traveling northward, is landing with a speed of 67 m/s. Once the jet touches down, it has 765 m of runway in which to reduce its speed to 5.1 m/s. Compute the average acceleration (magnitude and direction) of the plane during landing (take the

52. Chemisty

16.72g of sodium acetate trihydride (MW=136 g/mol) is dissolved in 100mL water. To this, 4.00g glacial acetic acid (Ka=2.2x10-5, MW=60.0 g/mol) is added, and distilled water is added to to the 500mL mark. Find the final pH and the molar concentration of

1)A piece of metal with a mass of 5.50 grams changed in temperature from 25 to 55 degrees celsius when 21.3 joules was absorbed. What is the specific heat of the metal? a)0.256 b)0.129 c)3.91 d) 7.75 e)0.710 Jg^-1 C^-1 I chose 7.75 because I did 5.50/21.3

54. Chemistry

1) Consider the formation of sulfur trioxide according to the reaction: 2 SO2(g) + O2(g) -> 2 SO3(g) delta H = -198 How much heat is evolved in the formation of 750 grams of SO3? I am not sure how to start this problem.

55. Precalculus

I don't even how to go about this.... Mars is in an elliptical orbit with the Sun at one focus, as shown in the figure. At its aphelion, Mars is 156 million miles from the Sun. At its perihelion, Mars in only 128 million miles from the Sun. How long is the

56. math

How can you tell if a number is rational or irrational? a) 3.215 (there is a line drawn over the 15) b.) square root 10 c) 0.143639854024 d)4.312 can you please explain what i need to look at to tell which is which?

57. physics

A ball of mass 1.04 kg at the end of a 0.52 m long string is swung in a vertical circle at the fastest constant speed the ball can have without the string breaking. If the string can only exert 33 N of force without breaking, a) What is the speed of the

58. Physics

A column of water has a diameter of 2 m and a depth of 8.6 m. How much pressure is at the bottom of the column? The acceleration of gravity is 9.8 N/kg. Answer in units of Pa

59. physics

What is a characteristic property? List 3 characteristic properties

60. economics

Which of the following is not an economic right or responsibility? Question 8 options: a.deciding where to live b. choosing an occupation c. paying taxes d. being happy

61. physics

A thin spherical shell of mass 0.400 kg and diameter 0.190 m is filled with alcohol (ρ = 806 kg/m3). It is then released from rest on the bottom of a pool of water. Find the acceleration of the alcohol filled shell as it rises toward the surface of the

62. physics

An electric motor lifts an elevator 1.1 m in 13.0 s by exerting an upward force of 7.80 x 104 N. What power does the motor produce in kW?

63. science

A proton (mass m = 1.67 multiplied by 10-27 kg) is being accelerated along a straight line at 2.2 multiplied by 1015 m/s2 in a machine. The proton has an initial speed of 2.4 multiplied by 107 m/s and travels 3.8 cm. (a) What is its speed? m/s (b) What is

64. math

The current I in an electrical conductor varies inversely as the resistance r of the conductor. The current is 6 amperes when the resistance is 920 0hms , what is the current when the resistance is 560 ohms

65. Chemistry

Write a chemical reaction showing an amphiprotic anion reacting as a base in water. Thank-you

66. physics

Please help me solve !!! Water flows into a swimming pool at the rate of 9.83 gal/min. If the pool dimensions are 33.4 ft wide, 44.9 ft long and 19.9 ft deep, how long does it take to fill the pool? (1 gallon = 231 cubic inches) Answer in units of min

67. math

the perimeter of some traffic sign must be 150 inches also its length is 15 inches longer than its width, find the dimensions of this sign

68. math

the perimeter of a triangle is 54 centimeters. the longest side is 6 centimeters less than the sum of the other two sides. Twice the shortest side is 10 centimeters less than the longest side. Find the lengths of each side of the tirangle

69. Math

for every girl taking classes at the school, there are 3 boys who are taking classes at the school. If there are 236 students taking classes, write and solve a propotion to predict the number of boys taking classes at the school.

70. Math

A circle with the equation (x+3)squared plus (y-2)squared = 25 is reflected over the line x=2. What is the equation of the image? (x-3)^2 + (y+2)^2=25 (x-7)^2 + (y+2)^2=25 (x-7)^2 + (y-7)^2=25 (x-3)^2 + (y-2)^2=25

71. math

what is the probability that a given day this month is a monday?

72. chemistry

As the temperature of a gaseous substance is decreased at constant pressure, it will undergo a series of physical changes. Which is the correct sequence of physical states that will be encountered? a.Liquid, solid, gas b.Gas, solid, liquid c.Solid, liquid,

73. math

the total length of 2 ropes A and B is 7.23 m. the total length of 2/5 of Rope A and 3/4 of Rope B is 3.97 m. Find the length of Rope A.(Skill: equations) (step by step and give explanation if can)

Timothy had a total of 238 blue and red marbles. He gave 3/7 of the blue marbles and 5/8 of the red marbles away. Altogether, Timothy gave away 124 marbles.How many red marbles did Timothy give away? (Skill: Equations)

75. Precalculus

This figure shows concentric circles of radii 3 and 5, respectively, centered at the origin of an xy-coordinate system. A ray from the center at an angle of t degrees to the x-axis cuts the two circles at points A and B. From A, a vertical line is drawn;

76. physics

A boy hops on his bike and rides 135 meters in 20 seconds. What is his average speed?

77. physics

A thin spherical shell of mass 0.400 kg and diameter 0.190 m is filled with alcohol (ρ = 806 kg/m3). It is then released from rest on the bottom of a pool of water. Find the acceleration of the alcohol filled shell as it rises toward the surface of the

78. physics

What is a mixture? describe the difference between a homogeneous and heterogeneous mixture

79. english

could you please let me know the parts of speech separatly each word for the following sentence : all that glitters is not gold

80. math

An object with zero initial velocity accelerates at a constant rate of 10 m/s. find its average velocity during the first 15 seconds

81. financial accounting

Connection Station, an internet café, had the following operating activities during the month of May: 1. Bought 800 in jump drives and disks, which are available for resale from Office Depot on credit 2. Paid 900 in utilities for the month of may 3. Paid

82. HCA331

To complete the following assignment, go to this week's Final Paper link in the left navigation. Final Project Given all of the information that you have learned about health care education, this assignment challenges you to convey that information to

83. physics

Assume your mass is 80 kg. The acceleration due to gravity is 9.8 m/s 2 . How much work against gravity do you do when you climb a ﬂight of stairs 2.3 m high?

84. Geometry

The length of the hypotenuse of a 30°-60°-90° triangle is 7. Find the perimeter. 7/2+21/2sqrt3 21+7sqrt3 7+21sqrt3 21/2+7/25sqrt3

85. english

can you help place quotation marks, commas, and periods where appropriate. My professor told us my favorite story by James Joyce is called The Dead Harold wrote I regret that I am unable to attend the fundraiser for AIDS research his letter, however

86. Precalculus

Given r = 10 cos θ If you sketched an angle of θ = 150 degrees, what quadrant would it be located in? It's either the first or second... I think second? Multiply both sides of r = 10 cos θ by r. Transform the resulting equation into Cartesian

87. Calc

I have an acceleration function and a velocity function that I know the equations for. How would I use those to find the equation for a position function x(t) if x(0) = 0? I'm just looking for a general method, but I can give the equations if needed.

88. History

What geographical features have affected Russia's climate, and how have they affected it?

89. algebra

A rectangular room measures 13 ½ feet long by 22 ¼ feet wide. Find the area of the room; remember, area = length x width.

90. algebra

could you please check this answer for me and correct. thanks given equation point slope form linear equation to use to do question. y-3 = 3(x+1) question rewrite this equation in standard form y- 3 + 3 = 3x - 3x +3 + 3 -3x+ y = 6 collect all variables on

91. math

explain the difference between the expressions x-3 and 3-x

92. Chemistry

I need the equation for determining how to decide : You are given a dosage of 30m/kg to be given every twelve hours, how much is given (in grams) with each dose. I know the answer is obviously 15 m/kg but what is it in grams?

93. Math

Find the angle the normal makes with the positive x–axis. 1. 3x – 2y – 1 = 0 2.5x + y – 12 = 0 3. 4x + 3y – 4 = 0 I cant Figure any of these out or how to do them..

94. physics

A skateboarder shoots off a ramp with a velocity of 6.4 m/s, directed at an angle of 61° above the horizontal. The end of the ramp is 1.4 m above the ground. Let the x axis be parallel to the ground, the +y direction be vertically upward, and take as the

95. Precalc

An ellipse has this Cartesian equation: ((x-2)/5)^2 + ((y-4)/3)^2 = 1 Find the focal radius Find the eccentricity Write the parametric equations for the ellipse Transform into the form, Ax^2 + By^2 + Cx + Dy + E = 0

96. english

I asked my father, “father, when will we take our vacation?”why does father i this sentence become capitalized:

97. maths

DIFFERENTIATE FROM FIRST PRINCIPLES (I)3X (ii)X^2+2X+3 (iii)1/x^2

98. Algebra

find the LCM of y^2+6y+9 and y^2+y-6

use each word or phrase as the subject of a sentence. add a verb describing an action that place in the present. make sure each verb agrees with its subect. they give a word my son make a sentence i just want to now did he write correct sentence or no the

100. Chemistry

The four statements below are used for applications of Hess's law. One of the statements is erroneous. Choose that statement. a) the value of delta H for any reaction that can be written in steps is the sum of the values of delta H for each of the

101. Stats

You are allowed to choose four whole numbers from 1 to 10 (including 1 and 10). You can only choose each number once though. Which of the following statements is FALSE? A. The numbers 4, 5, 6, and 7 have the smallest possible standard deviation. B. The

102. math

Jimmy had a total of 163 apples and oranges. After selling 50% of all the apples and 20% of all the oranges, he had 110 fruits left. How many oranges did Jimmy have at first?

i need this question to be answered please this is question- how does wind affect the ocean's heat. and my son write the answer- the wind will cool down the ocean heat. and i need one more answer this question one more sentence he make two sentence of this

104. Pre-Algrebra

How do you solve 5+2c/4=14

105. math

a) Determine the placement of departments for a newly designed facility that will minimize total transportation costs using the data in the following tables. Assume that reverse distances are the same. The locations are shown in the grid. Use a cost of \$1

106. geometry

If triangle ABC is equilateral with side lengths four times the square root of two and BD is perpendicular to AC, what is the length of BD.

107. maths

a owns a rectangularers compound of length 40 meters and width 25 meters what is the area of this compound in ares

108. Precalculus

The figure below shows a conchoid of Nicomedes. The top part is formed by a ray from the origin that rotates through an angle t° with the x-axis. The ray intersects the fixed line y = 2 at point A. From A you measure out 7 more units to point P on the

109. Precalc

(10 cis 200) (2 cis 50) = ? Is it just 20cis(10000)?

110. math

In an AP, the thirteenth term is 27, and the seventh term is three times the second term. Find the first term,?

111. Calc

So I have a particle that is moving along the x-axis. I have the acceleration equation, the velocity equation, and the position equation. I need to know what is the first time when t>0 that the particle returns to the origin? My position function is

112. Public Health

How do you think immigration of some ethnic groups has affected their risk of obesity and other chronic diseases? What intervention do you think can help to reduce obesity in children?

113. speech

Even when speaking, one must cross one's T's and dot one's i's. What does this mean when referring to public speaking? What public speaking term does this refer to?

114. algebra

factor 80x5th power -360x3rd power + 405x

115. MaTh!!!!

SIMPLIFY -2x(x^2+6x) + 3x(x+2)

116. physics

A space vehicle is coasting at a constant velocity of 21.1 m/s in the +y direction relative to a space station. The pilot of the vehicle fires a RCS (reaction control system) thruster, which causes it to accelerate at 0.380 m/s2 in the +x direction. After

117. Pre-Calc B

How do I find zeros on a graph of a cubic function? I can tell that two of the zeros are -4 and 3 because they show on the graph, but how do I find the other?

118. Precalculus

QUESTION 1 Joe intercepts a pass 8 yards into the end zone, 19 yards from the right side of the field as he faces the opposite end of the field (see figure). He starts running diagonally, moving at a rate of 4 yd/s down the field and 2 yd/s across the

119. Inequality

Solve: x - 4 less than or equal to 3x - 8 can u move the 4 and add and then move the 3x to the other side and it become -3x, and then solve?

120. physics

A boy hops on his bike and rides 135 meters in 20 seconds. What is his average speed?

121. algebra

find the LCM of 11(z-3)and 33(z-3)

122. MLIS

Q.3. Why resource sharing is necessary in libraries? How an academic library can cooperate in collection development?

123. French

Can someone please help edit my French? My French: Quelles matières étudiez-vous cette année ? Moi, je fais deux les maths, la chimie, la physique, l’anglais et le français. Je n’aime pas les maths parce que il y a beaucoup des devoirs pour les

124. Math

Lisa is painting a fence that is 26 feet long and 7 feet tall. A gallong of paint will cover 350 square feet. Write and solve a proportion to determine how many gallons of paint Lisa will need. Thanks, Ms. Sue for the last one...I got it!

125. Chemistry

Please help me with question #2: How do you determine if there is a linear relationship between NaCO3 used and CO2 produced?Discuss your results in terms of moles. Thank you!! Question #1 : 1. Record the amount of CO2 produced versus the amount of Na2CO3

126. mechanics

An ocean-going ferryboat is 4.38 m wide and 6.53 m long. When a truck pulls onto it, the boat sinks 6.36 cm in the water. What is the weight of the truck?

127. math

a) Determine the placement of departments for a newly designed facility that will minimize total transportation costs using the data in the following tables. Assume that reverse distances are the same. The locations are shown in the grid. Use a cost of \$1

128. physics

What is a precipitate?

Cassandra is repaying an installment loan of \$3500 with 20 equal monthly payments of \$196 each. What is the annual percentage rate of the loan?

130. Math

Evan is painting a stool that has a cylindrical seat and four rectangular prism legs. The seat has a diameter of 8 inches and a height of 2 inches. Each leg is 2 inches by 2 inches by ten inches. How much area will Evan have to paint? Use three point one

131. Precalculus

The polar equation of a graph is given below: r=4/sin(theta) Give the equation of the line in rectangular coordinates. If you rotate this graph 40 degrees counterclockwise about the pole, would you add or subtract 40 degrees to θ? Subtract?

132. maths

the perimeter of a rectangle is 12 c.m and its length is 4 c.m . what is its width? and the area?

133. geometry

In the diagram, UW and VW are midsegments of triangleRST. Suppose the length of UW is 78 inches. Find the length of VS.

I came up with 4.80 per share for the question. A mutual fund has total assets of \$57,000,000 and liablities of \$8,550,000. If \$15,960,000 shares outstanding, what is the net asset value of the fund? Please check my answer.

135. Algebra

Solve algebraically and check your potential solutions: sqrt((x+2) -x =0

136. Chemistry

How would you make 100mL of tartrate buffer, pH 3.5, from 0.100 M tartaric acid, 1M NaOH and deionized and distilled H2O? You need to consider the ionization of two the two acidic groups separately.

137. chemistry

I need help with this problem... A 1.208 g sample of a compound containing C, H, and O was burned to produce 2.561 g CO2 and 0.3930 g H2O. Calculate the empirical formula of the compound. I always get stuck when it comes to finding the subscript for this

138. math

During an art contest you and a classmate each won blue ribbons for 1/3 of the pieces you entered. You won 2 blue ribbons and the classmate win 3. Explain how.

139. math

Simplify the square root. 2 square root 50. What are the steps to simplify this problem.

141. physics

A 7.40 lb rock sits on top of a 76.0 foot cliff. it is pushed off. What is the energy in Joules of the rock just before it hits the ground?

142. Chemistry

Is this correct? A 0.7473 g sample of a compound containing C, H, and O was burned to produce 1.909 g CO2 and 0.7813 g H2O. Calculate the empirical formula of the compound. I got C5 H10 O1. I'm not sure if that's correct..

143. chemistry

Assuming the temperature and pressure are held constant, which of the gas samples has the greatest number of gas particles? a. 45.0 mL O3 b. 35.0 mL N2 c. 15.0 mL of CO2 d. 25.0 mL of SO with the little 3 at the bottom.

144. Calculus

Find a function f(n) which gives the rightsum approximation for the area under the given curve from x = 3 to x = 9 using n rectangles.

145. Physical Science/ Chemistry

I don't get how to balance this equation. Al+O2 → Fe2O3 Where is the Al in the product? Where is the Fe in the reactants? I am very lost with this problem.

146. physics

suppose that resting on your non-conducting desktop is a tiny piece of paper (m=0.08g) that has a charge of 4x10^-10C. You bring your comb 3 cm away from it and the paper jumps up to the comb. Give an approximate value for the charge of the comb. Does the

147. DeVry University

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.9 102 µm. Find this earthquake's magnitude on the Richter scale. (Round your answer to the nearest tenth.)

148. Precalc

A hyperbola has this Cartesian equation: -((x-2)/5)^2 + ((y+1)/3)^2 = 1 A. Find direction in which it opens. Horizontal? B. Find the coordinates of the center. I think it's (-2,1) or (1,-2)? C. Find the slopes of the asymptotes: m=+- ?

149. Maths

solve 3^x=4^(x-2)

150. math problem

is (-4, 7) a solution of 6x -5y = -2

151. Precalc

Given g(x) = (x + 5)(x2 - 6x + 13), find the one real zero of g(x): I think it's -5 Find the two complex zeros of g(x):

152. MLIS

Define Collection Development. How the acquisition of Library Material can be economical, rapid, transparent and accurate?

153. MLIS

Q.2. Write in detail the acquisition process with examples.

154. chemistry

A 0.6996 g sample of a compound containing C, H, and F was burned to produce 0.6039 g CO2 and 0.1235 g H2O. If the molar mass of the compound was determined to be approximately 102.0 g/mol, what is its molecular formula?

155. english

I love college football: there’s nothing like the sound of a fully packed stadium. Is the words college football capitalizedin this sentence?

156. math

The area of a rectangle is 24 m2. The length of this rectangle is 6 m. Which equation could be used to determine the width, w?

157. Math

True or False. A quadrilateral with these following vertices is a parallelogram. (-4,-3),(2,-3),(4,-6),(-4,-6)

158. english

can you check my puncuations. 5. My professor told us my favorite story by James Joyce is called, The Dead. 6. Harold wrote, I regret that I am unable to attend the fundraiser for AIDS research his letter, however contained a substantial contribution. 7.

159. maths

what is the area of a rectangle of length 6 c.m and width 3 c.m ? what is its perimeter/

160. maths

the area of a rectangle is 12 square c.m and its length is 4 c.m what is its width?

161. Science

"When Environmental Hazards happen, what should you do?"?

162. physics

What is a solution? What are the 2 parts of a solution

163. GeOmEtRy!!!

what number is excluded from the domain of the function y=5/x-3? please help me! a. 3 b. Not Here c. -3 d. 5

164. physics

An astronaut in his space suit has a total mass of 275 kg. His weight on the asteroid Erewhon is 0.3 N. What is the acceleration of gravity on Erewhon?

166. speech

what figure of speech is "it is a lovely little bright snake of a word"

167. Precalculus

A geometric series has t1 = 3 and r = 2. If tn = 96. What does n equal in this problem? What is the special name given to the terms between 3 and 96 in this problem?

168. Chemistry

What is the formula for Celsius and Kelvin scales for temperature?

169. physics

What is the concentration (in g/100ml ) of a solution which has 2,8g of NaCI dissolved into 88.0ml of water?

170. ethics

what is the and conventions or statuses of pureto ricans

171. Precalculus

A geometric series has t1 = 100 and t2 = 90. Find the number to which Sn converges as n gets very large.

172. eco/372

How has the past and current fiscal policies, monterey policies, budget deficits, and surplus effected the economy and the computer industry.

173. sociology

What are some changes that are occuring in families. Are these changes for the good or bad?

174. english

could you please correct the sentence: i stopped to smoke last year

175. physics

What is an isotope?

176. Chemistry

A 0.5595 g sample of a compound containing C, H, and O was burned to produce 1.429 g CO2 and 0.5850 g H2O. If the molar mass of the compound was determined to be approximately 86.13 g/mol, what is its molecular formula?

177. Huck fin

If you have read Huckleberry Finn before, what was your initial reaction to it?

178. trig

How to get 5degree without using calculator using identities?

179. chemistry

As the temperature of a gaseous substance is decreased at constant pressure, it will undergo a series of physical changes. Which is the correct sequence of physical states that will be encountered?

180. math problem

please find slope and y intercept f(x) = -3x -6 Slope = intercept =

181. math problem

please solve using the multiplication principle -1/2x = -3/4

182. food and nutrition

When running in cold weather which one of the following materials is not recommanded for layerimg next to the skin

183. math

If you have 1/2 x - 2/3 = 2 how would you solve, can you please help.

184. math problem

please solve 4x is greater than or equal to 20

185. Civics

Which is NOT a responsibility of the Department of Agriculture? 1. The opening of foreign markets to U.S. agricultural products =2. To oversee federal anti-hunger programs 3. The designation of lands for private and public use 4. Support for farmers with

186. chemistry

What isthe ionization of water?

187. greek philosophy and history

what is a Sophist?

1.As we move up the organization's hierarchy from clerical workers to executives, how does the type of support provided by information systems change? 2.How important are end users to the management of the organization's information resources?

189. Math problem

Please find slope if it exists x=-2