# Questions Asked onMarch 28, 2011

1. ## math

what should you call a man with a clamp

2. ## Chemistry

Suppose that 0.650 mol of methane, CH4(g), is reacted with 0.800 mol of fluorine, F2(g), forming CF4(g) and HF(g) as sole products. Assuming that the reaction occurs at constant pressure, how much heat is released? Substance & Enthalpy of Form. (kJ/mol)

3. ## chemistry

how many oxygen atoms are in 0.25 mole of SO3 ?

4. ## physics

An archer shoots an arrow toward a 300 g target that is sliding in her direction at a speed of 2.15 m/s on a smooth, slippery surface. The 22.5 g arrow is shot with a speed of 38.0 m/s and passes through the target, which is stopped by the impact. What is

5. ## chemistry

Consider the reaction HCl + NaOH ->NaCl + H2O Given: HCl Solution: 22 degrees celsius NaOH Solution: 22 degrees celsius Final Temperature: 26.1 degrees celsius A. Calculate the amount of heat evolved when 15 mL of 1.0 M HCl was mixed with 35 mL of 1.0 M

6. ## algebra

Theresa has \$26 in her wallet. The bills are worth either \$5 or \$1. If there are 14 bills total, how many does she have of each type?

7. ## Clothing and Textiles

What are thedifferent methods of controlling fullness in a garment. Need pictures

8. ## Spanish

i had to listen to an audio of these two poems and type them down. I did that part but I'm not sure of the accent marks of some words. If you can help me that would be great and also explain them to me more like do the meanings differ in the following

9. ## physics

An object traveling 200 feet per second slows to 50 feet per second in 5 seconds. Calculate the acceleration of the object.

10. ## English

Need to label the verb wish A for action of L for Linking... 1. The koala bears have climbed the tree. Answer=A 2. The peacock seemed more beautiful than before. Answer=A 3. In the rain forest display at the zoo, the birds looked stange and exotic.

11. ## geometry

You are planning to use a ceramic tile design in your new bathroom. The tiles are blue and white equilateral triangles. You decide to arrange the blue tiles in a hexagonal shape as shown below. If the side of each tile measures 10 cm, what will be the

12. ## Chemistry

a. write the complete hydrolysis equation of NaC2H3O2 b. identify the spectator ions c. identify conjugate acid base pairs

13. ## Physics

A 300 g bird flying along at 6.2 m/s sees a 10 g insect heading straight toward it with a speed of 27 m/s (as measured by an observer on the ground, not by the bird). The bird opens its mouth wide and enjoys a nice lunch. What is the bird's speed

14. ## 30-60-90

The shorter leg of a 30-60-90 triangle is 5.4 feet long. Find the perimeter

15. ## college chem

A 0.1276 g sample of a monoprotic acid (molar mass = 1.10 x 10^2) was dissolved in 25.0 ml of water and titrated with 0.0633 M NaOH. After 10.0 ml of base has been added, the pH=5.47. What is the Ka for the acid?

16. ## french 2

-FRENCH 2- i am having a lot of trouble with l'imparfait et le passe compose-talking about actions in the past- and i need some tips on how to study.... anyone got suggestions? im open to anything. thank you very much! :)

17. ## Treacher girls scholl

A hydrocarbon is burnt completely in air to form 13.2g of carbon dioxide gas and 7.2g of water. What is the molecular formula of the hydrocarbon?

18. ## Literature

Over the course of The Screwtape Letters, the state of the patient's soul fluctuates as he experiences a conversion, doubt, dangerous friendships, war, love, and finally, in death, oneness with God. What major strategies does Screwtape use to tempt the

19. ## Gen Chem

What are the net ionic equations for: 1. Potassium Fluoride and Ammonium Chloride and 2. Sodium Hydrogen Sulfite and Potassium Cyanide?

20. ## math

a hot-air balloon is seen in the sky simultaneously by two observers standing a t two different points on the ground. (the 2 people are facing each other and the balloon is in between them in the air.)they are 1.75 miles apart on level ground. The angles

The combusion of glucose produces carbon dioxide and water vapor according to the chemical equation below: C6H12O6 (s) + 6O2 (g) ---> 6CO2 (g) + 6H2O (g) DELTA H = -2540 kj Calculate the energ involved in making 75.0 g of glucose from carbon dioxide and

22. ## Chemistry

When light having a wavelength of 497 nm strikes a metal coating of an emitter, an elector with kinetic energy of 2.52 x 10^-19 is ejected. What is the threshold frequency for this metal?

23. ## Calculus

A spherical balloon is being inflated at a rate of 10 cubic inches per second. How fast is the radius of the balloon increasing when the surface area of the balloon is 2pi square inches? Enter your answer correct to 3 decimal places.

24. ## physics

the force that charge qA exerts on charge qB is ___ the force that charge qB exerts on charge qA. opposite and equal to opposite and greater than opposite and less than the same as

25. ## Calculus

An open-topped cylindrical pot is to have volume 125 cm3. Determine the minimum possible amount of material used in making this pot? Neglect the thickness of the material as well as possible wastage. Give your answer accurate to 2 decimal places.

26. ## social studies

I need a poem about the battle of lexington and concord.

27. ## Chemistry

A gas expands from 282 mL to 971 mL at constant temperature.Calculate the work done (in joules) by the gas if it expands against a constant pressure of 6.00 atm.

28. ## chemistry

Balanced equation: 2HCL+CaCO2>CaCl2+CO2+H2O what volume of 6.00 M HCL is needed to completely react with .750 moles of CaCO3

teacher divided students into groups of 3. each group of 3 wrote a report the had 9 pictures in it. the students used 585 pictures all together. how many students were there in all?

30. ## Physics (dynamics)

While standing on a horizontal frictionless surface, a 50 kg student pushes against a wall with an average force of 125 N east for 0.110 s. Calculate the velocity of this student at 0.110 s

31. ## physics

A steel ball of mass 0.300 kg is fastened to a cord that is 70.0 cm long and fixed at the far end. The ball is then released when the cord is horizontal. At the bottom of its path, the ball strikes a 2.50 kg steel block initially at rest on a frictionless

32. ## physics (3 seperate questions)

1. A small fly of mass 0.26 g is caught in a spider's web. The web vibrates predominately with a frequency of 4.2 Hz. Find the effective spring stiffness constant k for the web. Hint: use natural frequency of oscillations formula. N/m 2. At what frequency

33. ## physics

A 1500 kg car moving at 10 m/s is stopped by the action of its brakes. The work done by the car's brakes is ____ Joules.

34. ## geometry

A cable 22 feet long runs from the top of a utility pole to a point on the ground 15 feet from the base of the pole. How tall is the utility pole? - thanks!

35. ## statistics

The participants in a weight-loss class lost the following weights (in pounds) after three weeks of dieting:3,6,0,3,0,0 Assuming that these weights constitute an entire population, find the standard deviation of the population. Round your answer to at

36. ## math

Formulate a system of equations for the situation below and solve. A theater has a seating capacity of 660 and charges \$2 for children, \$4 for students, and \$6 for adults. At a certain screening with full attendance, there were half as many adults as

37. ## Physics

According to conservation of momentum, when two objects collide, the momentum lost by one object equals the momentum gained by the other. Give a common-sense, non-mathematical explanation of the connection between Newton’s 3rd law and momentum

38. ## Stats

How many different simple random sample of size 8 can be obtained from a population whose size os 42?

39. ## math

In the following figure, AF is the perpendicular-bisector of BD, AD = 15, and DF = 13. Find AB + BF

40. ## physics

You are the technical consultant for an action-adventure film in which a stunt calls for the hero to drop off a 18-m-tall building and land on the ground safely at a final vertical speed of 5 m/s. At the edge of the building's roof, there is a 100-kg drum

41. ## PHYSICS

A nuclear reactor contains nuclei that fission when bombarded by slow neutrons. The fission reaction produces fast neutrons which need to be moderated (i.e. slowed down) in collisions before they can cause further fissions. In this problem we consider a

42. ## chemistry

1. the solubility of AgCl in water is 3.97x10^-6 at 0*C and 1.91X10^-4 at 100*C. calculate Ksp for AgCl at each temp. 2. using the data from #1 and the clausius- Clapeyron equation, calculate deltaH* and deltaS* for the formation of a saturated solution of

43. ## math

what is the elapsed time between 5:12am and6:05pm?

44. ## Physics - Doppler Effect

The siren in an ambulance has a frequency (according to you) of 1100 hz as it moves towards you at a speed v. It then makes a u-turn and travels away from you with a speed v, and you hear a frequency of 950 hz. What is the final speed v of the siren?

45. ## Chemistry

Sodium vapor lamps, used for public lighting, emit yellow light of wavelength 589 nm. How much energy is emitted by 5.00 mg of sodium atom emitting light at this wavelength?

46. ## Geometry

find the circumference of the figure, Give both the exact value and an approximation to the nearest hundredth. Circle 6.6km I am just learning this and a teacher is using inches but the textbook has metrics and I never learned the metric system Please

47. ## 30-60-90 triangle

The hypotenuse of a 30-60-90 triangle is 10. Find the perimeter. How do i do that?

48. ## chemistry

Consider the titration of 88.0 mL of 0.150 M Ba(OH)2 by 0.600 M HCl. Calculate the pH of the resulting solution after the following volumes of HCl have been added. 0.0 ml 12 ml 31 ml 44 ml 88 ml

49. ## physics

Three identical stars of mass M = 6.4 x 1030 kg form an equilateral triangle that rotates around the triangle's center as the stars move in a common circle about that center. The triangle has edge length L = 5.0 x 1010 m. What is the speed of the stars?

A blanket of thick fog covered the area Visibility there was almost zero How are the two related? a. The two sentences establish a comparison b. The second sentence contradicts the first c. The first sentence explains the meaning of visibility d. The

51. ## OMT101

Find variance and standard deviation for the data 35,45,30,35,40,25

52. ## physics

A 1500 kg car moving at 10 m/s is stopped by the action of its brakes. The work done by the car's brakes is ____ Joules.

53. ## Calculus

Find the length of the intercepted arc with radius 2.5 cm and a central angle of 95 degrees

54. ## chemistry

if .55 grams of a gas dissolves in 1 liter of water at 20 kPa of pressure, how much will dissolve at 110 Kpa of pressure?

55. ## Chemistry

determine the redox reaction represented by the following cell notation Mg Mg2 Cu2 Cu

56. ## Math

Sketch the graph of a function f that satisfies all the following conditions. (a) f(0)=0,f'=1 (b) f''(x)>0 for x

57. ## math

There are 25 red, blue, yellow and green marbles in a bag. Four of the marbles are blue and the probability of selecting a blue or green marble at random is 40%. Write and solve an equation to determine the number of green marbles in the bag

58. ## Physics

An inexperienced catcher catches a 128 km/h fastball of mass 134 g within 1.01 ms, whereas an experienced catcher slightly retracts his hand during the catch, extending the stopping time to 10.1 ms. What is the average force imparted to the two gloved

59. ## physics

A meterstick is at rest in an inertial frame S2.If S2 moves with a speed of 0.8 c with respect to a rest frame S1, find the length of the meterstick as measured in frame S1 according to classical physics. Answer in units of m.

60. ## geometry

Two sides of a triangle measure 4 inches and 9 inches. Determine which cannot be the perimeter of the triangle. A.19 inches, B.21 inches, C.28 inches, D.26 inches

61. ## trig

In a circle of radius 12 inches, a sector is formed by a central angle of pie/4 radians. Find the area of the sector to the nearest hundredth of a square inch.

62. ## physics

An unstable atomic nucleus of mass 17.0 ¡Ñ 10¡V27 kg which is at rest disintegrates into three particles. One of the particles, of mass 5.00 ¡Ñ 10¡V27 kg, moves in the y direction with speed 4.50 Mm/s. Another, with mass 8.40 ¡Ñ 10¡V27 kg, moves

63. ## math

The number 1 is a perfect square and a perfict cube. What is the next smallest whole number which is a perfect square and a perfect cube?

64. ## physics

A small fly of mass 0.26 g is caught in a spider's web. The web vibrates predominately with a frequency of 4.2 Hz. Find the effective spring stiffness constant k for the web. Hint: use natural frequency of oscillations formula. N/m

65. ## Chemistry

What is the energy and wavelength of a photon with a frequency of 91.5 MHz?

66. ## physics

determine the kinetic energy of falling by an average of one degree of freedom of the nitrogen molecule at temperature T = 1000 K, as well as the kinetic energy of rotational motion.

67. ## geometry

if the area of triangle QRS is 38 sq cm, what is the area of QRST?

68. ## math

a hot-air balloon is seen in the sky simultaneously by two observers standing a t two different points on the ground. (the 2 people are facing each other and the balloon is in between them in the air.)they are 1.75 miles apart on level ground. The angles

69. ## physics

The four wires that lie at the corners of a square of side a= 5.60 cm are carrying equal currents i= 1.80 A into (+) or out of (-) the page, as shown in the picture. Calculate the x-component of the force on a 1.0-cm long piece of the lower right-hand

70. ## language arts

my mom went to the grocery store. she forgot her purse... a)comma B)and c)or d)but e)because

71. ## Chemistry

a solution is made by combining 5 mL of .2M HC2H3O2, 5 mL of .2M NaC2H3O2, and 10 ml of water. calculate the molarity of HC2H3O2 and of NaC2H3O2 in this new solution

72. ## chemistry

what would happen to the volume of the 100-L weather balloon if its temperature increases from 25 degrees Celsius to 125 degrees Celsius while the external pressure remains constant? Again, there are no leaks in the balloon.

73. ## Calculus

A ball is thrown upward with an initial velocity of 96 feet per second from the top of a 100 foot building. (a) When well the ball attain its maximum height? (b) When will the ball hit the ground? Give a decimal answers correct to 2 decimal places.

74. ## physics

if a negatively charged rod is brought near a negatively charged electroscope, there will be no effect the leaves will fall the leaves will spread farther apart the electroscopw will become positively charge

75. ## pre calculus

1. a plane has heading of 54 degrees & airspeed of 225mph. The wind is blowing at 33mph from 144 degrees. what are its actua heading & airspeed? Round to one decimal place. A) 61.4deg, 257.1mph B) 7.4deg, 66114.0mph C) 136.6deg, 288mph D) no solution

76. ## stats

A sample of 12 observations is selected from a normal population for which the population standard deviation is known to be 4. The sample mean is 19. (Round your answers to 3 decimal places.) (a) The standard error of the mean is The 90 percent confidence

I need help with this problem: Suppose you design a second model car that is 1/4 the size of the model car you designed in Excercise 9.What is the perimeter of the license plate on the second model car? Let me explain.The perimeter of the actual car's

78. ## Discrete Math

An arithmetic sequence begins, 116, 109, 102 Find the 300th term of this sequence.

79. ## Algebra 2

The frequency of a radio wave is inversely proportional to the wavelength. If a wave 250 m long has a frequency of about 1200 kHz, what is the approximate length of a wave with a frequency of 800 kHz? A. 167 m B. 258 m C. 325 m D. 375 m

80. ## Chemistry

The distance between the first and fourth crest of water is 10.9 m. A crest appears every 0.435 minutes, at a point along the wave. What is the speed (m/s) of the water waves?

81. ## physics (3 separate questions)

1. The motion of a body is described by the equation ay = −308y. (a) Find the angular frequency. (b) Find the frequency. (c) Find the period. 2. A 2.10 kg mass attached to a spring oscillates with a period of 0.395 s and an amplitude of 20.5 cm. (a) Find

82. ## Chemistry

The density of a gas containing chlorine and oxygen has a density of 2.875 g/L at 754.5 mm Hg and 11(degress C). What is the most likely molecular formula of the gas?

83. ## icp

you wreck a car travveling at 88 m/sec and decelerate at -200/s2 how far will the car crumble in at you.

85. ## math

Dana buys a piece of carpet that measures 20 square yards. Will she be able to completely cover a rectangular floor that measures 12 ft 6 in. by 16 ft 6 in.?

86. ## algebra 2

Guy wire. How long is a guy wire reaching from the top of a 24ft pole to a point on the ground 16 ft from the pole? Thank you.

87. ## math

Assume that the sides of triangles are limited to whole-number measures. How many different triangles have a perimeter of 12 meters? Explain how you determined this.

88. ## Physics

A radioactive nucleus is at rest when it spontaneously decays by emitting an electron and neutrino (as shown in the figure below ). The momentum of the electron is 8.11 x 10−19 kg·m/s and it is directed at right angles to that of the neutrino. The

89. ## chemistry

Investigating changes in colligative properties involves the measurement of a solution’s concentration in molality instead of molarity because of which of the following? the mass of the solvent does not change, but its volume does change, as temperature

90. ## Chemistry HELP! IMLOST

The density of a gas containing chlorine and oxygen has a density of 2.875 g/L at 754.5 mm Hg and 11(degress C). What is the most likely molecular formula of the gas?

91. ## math

In 1991, the separation between goalpost uprights in college football changed from 23 feet 4 inches to 18 feet 6 inches. What percent reduction was this? (accurate to tenths)

92. ## algebra 2

Guy wire. How long is a guy wire reaching from the top of a 21ft pole to a point on the ground 14 ft from the pole? Thank you.

93. ## Algebra II-Please check my calculation

Find center, vertices, co-vertices and foci for the following; (x-3(^2/49 + (y-4)^2/4 = 1 Center would be (3,4) A=7 b=2 Vertices would be found this way: (h+-a,k) (3-7,4) (3+7,4) Vertices = (-4,4) (10,4) Co-vertices (h,k+-b) (3,4-2) (3,4+2)

94. ## Math

Find x, the angle of depression (measured in degrees) from the top of a lighthouse that is 173 ft above water level to the waterline of a ship 4835 ft off shore. Round your answer to the nearest hundredth of a degree.

95. ## Physiology

Parathyroid hormone and calcitonin are synthesized where?

96. ## Physics

what is the kinetic energy in joules of a 1040-kg automobile traveling at 81 km/h ?

97. ## English

1. Please water the plants while I am away. 2. Please water the plants while I am absent. 3. Please water the plants in my absence. 4.Please water the plants while I am not here. 5. Please water the plants while I am out. 6. Please water the plants while I

98. ## chemistry

In the chemical expression, 5 C2H4 : There are __________ molecules of Ethene represented which contain a total of _______ atoms of Hydrogen. Please give both answers in number form with a comma between numbers.

99. ## Math

The 16th term of an Arithmetric Progression is four times the 36th term, and exceeds it by 32. Finda the numbers.

100. ## physics

A mass of 0.246 kg is converted completely into energy of other forms. How much energy of other forms is produced? The speed of light is 2.99792 × 108 m/s. Answer in units of J.

101. ## english 10

Every sentence in the paragraph below violates some principle of good persuasive writing. Revise the paragraph, following the directions at the end of each sentence; use your imagination where necessary. Type the revised paragraph in the text box provided

102. ## Chemistry Molarity

What is the concentration, in units of molarity, of a 500mL solution containing 0.750 moles of sodium chloride in water?

I am doing a paper on not for profit and for profit health care organizations and i am confused I know for profit is to make money and not for profit has more of the charity help but when i do a search i always get non-for profit so is for-profit

104. ## Environmental Science

In the United States we are fortunate to have an abundant supply of food, and much of this is due to our agricultural technology. However, there are many concerns about our food source including genetically modified crops, the use of more chemicals, and

105. ## physics

A hunk of cast concrete with a weight of 10 N will float if it displaces 10 N of water. True or False

106. ## math could anyone help me plz?:[

you have a \$5841 credit card debt, and you plan to pay it off through monthly payments of \$71. if you are being charged 14% interest per year, how long will it take you to repay your debt?

107. ## Chemistry

Calculate the concentration of H3O+ that contains 5.5 x 10 ^-5 moles/L OH- at 25 degrees

108. ## physics

A 68.0 kg person throws a 0.0450 kg snowball forward with a ground speed of 27.0 m/s. A second person, with a mass of 58.0 kg, catches the snowball. Both people are on skates. The first person is initially moving forward with a speed of 2.50 m/s, and the

109. ## Stats.

An obstetrician maintains that preterm babies (gestation less than 37 weeks) have a higher variability of birth weight than do full-term babies (gestation 37-41 weeks). According to the National Vital Statistics Report, Vol. 48, No. 3, the birth weights of

110. ## chemistry

A plot of ln k vs. 1/T for the reaction gave a line with a slope - 3250 kelvin determind the energy of activation?

111. ## Math

There are 7 green cas. Predict the number of of green cars you would expect to see if there were 125 cars in the parking lot.

112. ## Psy202

identify the 3 domains of development, why it is important to consider each domain in the study of adult development, and an example of how one domain of development impacts the other two.

113. ## Calculus

A ball is thrown upward with an initial velocity of 96 feet per second from the top of a 100 foot building. (a) When will the ball attain its maximum height? (b) When will the ball hit the ground? Give a decimal answers correct to 2 decimal places.

114. ## English

What is the adverb in these sentences? I got the answer, but can you check? In the past, scientists did not have much information about certain animals. Adverbs: Past, much With modern technology that has already changed. Adverbs: modern, already A cat

115. ## math

Calculate the volume of the cone with a = 18 and b = 11. Round answer to the nearest tenth. Use 3.14 for pi

116. ## What is the meaning?

I don't understand this quote "There are decades where nothing happensl and there are weeks where decades happen."?????

117. ## physics

The total energy of a 2.00 kg falling rock is 5000 J. If its potential energy is 1975 J, the kinetic energy of the rock is ____ J. The speed of the rock is ___ m/s

118. ## College Chem

What is the pH at the equivalence point in the titration of 0.250 M HX (Ka = 5.2 x 10^-6) with 0.250 M KOH?

119. ## physics

Zero, a hypothetical planet, has a mass of 5.7 x 1023 kg, a radius of 2.8 x 106 m, and no atmosphere. A 10 kg space probe is to be launched vertically from its surface. (a) If the probe is launched with an initial kinetic energy of 5.0 x 107 J, what will

120. ## English

Can you please check if everything is all right in these sentences I wrote on the second world war. Thank you. 1) On the 1st of September 1939 the Germans invaded Poland; on the 3rd of September the Western Powers (France and England) declared war on

121. ## chemistry

Balanced equation: 2HCL+CaCO2>CaCl2+CO2+H2O what volume of 6.00 M HCL is needed to completely react with .750 moles of CaCO3

122. ## PHYSICS

In a laboratory experiment, a bullet of mass 47.0 g is shot horizontally into a stationary block of totara of mass 3.50 kg that hangs from a light string. The bullet is then embedded a distance d = 3.50 cm into the block and the combined block-bullet

123. ## Science

how many atoms of carbon in 18 grams of C3H8o

124. ## Physics

A sled of mass 5.98 kg is coasting along on a frictionless ice-covered lake at a constant speed of 1.42 m/s. A 1.98-kg book is dropped vertically onto the sled. At what speed does the sled move once the book is on it?

125. ## science - magma

Magmas which have different chemical compositions have different temperatures i.e basaltic magmas erupt at about 1200 °C whereas rhyolitic magmas erupt at about 700 °C. what is the difference in chemical composition between these two? also why can the

126. ## Math

How much money has to be invested at 4.3% compounded continously to have \$19,000 after 16 years

127. ## Algebra

The area of a playground is 221 yd^2. The width of the playground is 4 yd longer than its length. Find the length and width of the playground.

128. ## Calculus

Using L'Hopital's Rule, find the limit: lim x->0+ (as x approaches 0 from the right) of sinx/x^(1/3)

129. ## Math

A rope 3/4 yard long is cut into 9 pieces. Each piece is the same length. how long is each piece?

130. ## Chemistry

A laser produced a light of wavelenth 575 nm. How many photons of this light would have to strike a material for the material to absorb 55.1 kJ?

131. ## math !!!! :O

Daniel gave 4/5 of his stickers to Javier. Javier’s collection of stickers increased to 64. If Javier had 28 stickers in the beginning, how many stickers did Daniel have in the beginning?

132. ## Mcdonalds

What company is related to mcdonalds?

133. ## math

Please Help!! The mean weight of 75 2nd graders is 55.7 lbs and the mean weight of 25 1st graders is 42.6 lb. What is the mean weight of the 100 children

134. ## math

Pivot the system about the element in row 2, column 1. –5 5 –7 10 4 4

135. ## math

A team has twelve 15-year-old players and eight 16-year-old players. The coach of the team is 43 years old. Which measure of central tendency best represents the ages of the team, including the coah, and why? A: Mean, because it is not affected by the age

136. ## chemistry

if the pressure on a 100-L weather balloon changes from 1.0 atom to 2.0atom, what would be the volume of the balloon at the higher pressure? Assume the temperature does not changes and the balloon has no leaks. what is the volume = to

137. ## chemistry

How many grams are required to make 1.5 L of 3.0 M hydrochloric acid (HCl) solution?

138. ## algebra

Solve the following equation for p. Show all of your work. r = 4q - 5p over 9

139. ## algebra 2

Guy wire. How long is a guy wire reaching from the top of a 24ft pole to a point on the ground 16 ft from the pole? Thank you.

140. ## earth science

what is the tectonic setting of seattle washington?

141. ## Literature

In discussing time, change, and pleasure, Screwtape asserts that "just as we pick out and exaggerate the pleasure of eating to produce gluttony, so we pick out this natural pleasantness of change and twist it into a demand for absolute novelty". Why is the

142. ## calc b

lINEAR APPROXIMATION; find a linearization at a suitably chosen interger near X at which the given function and its derivative are easy to evaluate; f(x)=1+X x=8.1

143. ## accounting

Assume that the following transactions affected owners' equity for De Soto Inc. during 2011. Feb. 1- Sold 40,000 shares of common stock in the market. Apr. 1- Purchased 3,000 shares of common stock to be held as treasury stock. Paid cash dividends of \$0.50

144. ## Jenny - earth-geology

I removed your original post because you included your full name and your town. That's too much personal information for a public forum. Here's your question: Hey there, can anyone help with this question:-Mineral amphibole is composed of double chains of

145. ## math

what is the height of a triangle that the base is 16m and an area of 64m

146. ## Chemistry

In a hydrogen atom, form what energy level must an electron fall to the n=3 level to give a line at 1.28 micrometers (um) in the infrared region?

147. ## equation

what is the equation of calculating 5/90 lottery winning numbers if these numbers were selected for the first week 24-13-6-60-70

148. ## English

I forgot two include these two very last sentences. Thank you. 1) You can write either on the photocopy or on the fool-scap paper (I don't know if it is correct) 2)Present the character of the prioress, pointing out her appearance, her attitude towards her

149. ## PRE CALC! HELP

1. a plane has heading of 54 degrees & airspeed of 225mph. The wind is blowing at 33mph from 144 degrees. what are its actua heading & airspeed? Round to one decimal place. A) 61.4deg, 257.1mph B) 7.4deg, 66114.0mph C) 136.6deg, 288mph D) no solution 2.

150. ## Physics

While standing on a frictionless ice surface, a 50 kg skater pushes against a wall with an average force of 150 N west for 0.210 s. Calculate the velocity of the skater at 0.210 s. This was what i did: m = 50 kg Fnet = 150 N t = 0.210 s Vf =? Fnet = ma

The modern hearing aid is, essentially, a miniature public-address system, which converts sound into electrical energy and then converts it back to sound again. A hearing aid can increase the sound level by sixty decibels or more, but it also distorts the

152. ## physics

At what frequency would you expect the web to vibrate if an insect of mass 0.52 g were trapped? Hint: use stiffness constant found in part 1. Hint: after the insect is trapped, the mass of the oscillator has increases by insect's mass, so the mass in the

153. ## math

triangle a and b are similar the ratio of a side of triangle b to a corresponding sid of triagle a is 5.3 the lengths of the sides of triangle a a are 18ft, 27ft and 30ft find the perimeter of triangle b

154. ## physics

A car can go from 0 to 85 km/h in 10 s. If the engine delivered twice the power, how many seconds would it take?

155. ## chemistry

how much energy is given off when 2.00 mol of CH4 are burned?

156. ## Math

Which expression represents the larger number? A. 40.1 x 10 to the -6 power B. 4.1 x 10 to the -7 power C. 0.411 x 10 to the -6 power D. 0.04001 x 10 to the -5 power I got A, but I'm not quite sure if it's the right answer :/

157. ## physics

The load across a 12 V battery consists of a series combination of three resistors 21 ohm, 22 ohm, and 56 ohm. What is the total resistance of the load?

158. ## Science

Compare an astronauts weight in orbit with the astronauts weight on Earth, assuming the mass of the astronaut doesn't change.

159. ## Spanish

The peoms are written that way I'm just not sure of the accent marks of some words. If you can help me,that would be great and also explain the accent marks more. that would help me in future. Thanks! First poem No sé qué te diera, por una mirada… un

160. ## Science

Why are ecosystems important to the survival of humans?

161. ## algebra

find the positive value of x, to the nearest hundredth, that satisfies the equation 1 over x= x+2 over 2x+3

162. ## chemistry - help

0.3g of clotrimazole (C22H17ClN2) was dissolved in 80ml of anhydrous acetic acid. This was titrated with 0.1M perchloric acid using 0.3ml of naphtholbenzein as indicator until the colour changes from brownish-yellow to green. 1ml of 0.1M perchloric acid is

163. ## Interest Rates

Homer won a prize in the lottery of \$1000, payable \$500 immediately and \$500 plus 4% simple interest payable in 250 days. Getting impatient, Homer sells the promissory note to Moe for \$450 cash after 130 days. Using a nominal 360 day year, find the simple

164. ## PHYSICS

A submarine has run into trouble and is stuck at the bottom of the ocean. Several people are on board and must make their way to the surface without any diving gear. The air pressure aboard the submarine is 3.04 atm. The air temperature inside the

165. ## chemistry

In a mixture of ammonia an chlorine with excess ammonia what is the product

166. ## math

Rachel cannot remember how much money she had when she came to school this morning. She used half of the money for lunch and then spent half of what was left to buy paper. If she now has #1.35, how much money did Rachel begin with?

167. ## Chemistry

What is undergoing oxidation in the redox reaction represented by Fe Fe3+ Cl2 Cl- Pt

168. ## Physics

Specifically, which of the following best expresses your view: i. Many physics concepts make a lot of sense and connect to everyday experience; but formulas are more of a problem-solving tool than a sense-making tool. ii. It really depends on the formula.

169. ## physics

A spring scale being used to measure the weight of an object reads 12.8 N when it is used on earth. The spring stretches 4.95 cm under the load. The same object is weighed on the moon, where gravitational acceleration is 1/6g. Find the reading of the

170. ## Pre Calculus

Given Triange ABC with an area of 100.2 a = 32.5 c = 29.2 Find angle B, expressed in degrees.

171. ## english

What opinion might they have of the author? What could you as a writer do to prevent this problem?

172. ## Math

A company contributes \$170 per month into a retirement fund paying 4.20% compounded monthly and employees are permitted to invest up to \$ 2,800 per year into another retirement fund which pays 4.20% compounded annually. How large can the combined

173. ## Math

I need help.I'm in 5th grade.The question is:12 less than the product of 5 and a number equals 8.What is the unknown number?Plz help

174. ## Chemistry

When someone buys fish at the fresh fish market, they should smell the fish to test for freshness, the less “fishy” the smell the fresher the fish. I am supposed to explain the source and chemistry, including reactions, structures, and names of the

175. ## Math

The mean weight of 75 2nd graders is 55.7 lbs and the mean weight of 25 1st graders is 42.6 lb. What is the mean weight of the 100 children

176. ## geometry

Calculate the volume of the figure shown. a = 8 and b = 12. Use 3.14 for pi and round answer to the nearest tenth

177. ## math

What is the degree of the 3rd angle if the other two are 68 degrees?

178. ## math

what is the probability of selecting 5 from 90 numbers if these were selected first and had been added to it again 13-60-6-24-72

179. ## Math

How many 9" squares are there in a 8' x 10' area?

180. ## math

given that a+b/5 = b+c/6 = c+a/7 = k, find the ratio a:b:c.

181. ## Essay- Added a bit more

Im doing an essay and this is the format for it. Intro of 5 or more sentences, where you introduce your thesis statement (that which you will be writing about - in the form of a statement, or point of view) Two or three paragraphs, of about 8-10 sentences

182. ## English

Can you please check these sentences for me? Thank you very much in advance. 1)Each group has to interview an American host student for ten minutes and then report about him/her to the whole class (also: present him o her to the whole class). 2)

183. ## English

I forgot to add these very last sentences. Thank you very much for all! 1) I last felt sorry when my best friend lost his father in a car accident. 2) I last felt sorry for a friend of mine, whose father was run over by a lorry while crossing the road. 2)

184. ## Physics

A tennis ball of mass 0.0609 kg is served. It strikes the ground with a velocity of 52.5 m/s (117 mi/h) at an angle of 22.0° below the horizontal. Just after the bounce it is moving at 50.5 m/s at an angle of 17.7° above the horizontal. If the

185. ## English

I am writing an argumentative essay on Why I think America should not have to accommodate the languages of immigrants that come to America that they should learn English before being eligible to become a US citizen.

186. ## Physics

A submarine has run into trouble and is stuck at the bottom of the ocean. Several people are on board and must make their way to the surface without any diving gear. The air pressure aboard the submarine is 3.29 atm. air temperature inside the submarine is

187. ## algebra 2

Darla is building a new desk. To make sure she had made a square corner, she measures 4ft. from the corner along one edge and 6ft. from the corner along the other edge. How long (in feet) should the diagonal be between those two points if the corner is a

188. ## Managerial Accounting

The questions in this exercise are based on JetBlue Airways Corporation. To answer the questions, you will need to download JetBlue’s 10-K/A for the year ended December 31, 2004 (10K/A with a filing date of March 8, 2005). You do not need to print the

189. ## math

Samantha has an average of 92% on tree math test. If one of her grades was 84% and the other is 93%, what was the grade of her third test?

190. ## Enviornmental Science 104

GIS Identified Environmental Constraints It is because of regulations that environmental consulting companies in New Jersey are in such high demand, as it is a lengthy process to apply for a permit of any kind. My questions are: Do you think that by

191. ## physics

what's the resulting acceleration when unbalanced force of 98N applied to a 5.1 kg object?

192. ## psychology

what are the basic concepts of human interaction from a psychology perspective. In your examination, describe at least two examples of how human behavior changes based on social situations

193. ## math

What is the value of \$6,440.00 at 10% interest rate in 19 months?

194. ## Calculus B

The Antiderivative of: (2x+3)/((x^3)+3x) This one is devinately integration by partial fractions but im not sure what i am doing wrong. PLEASE HELP.

195. ## statistics

A resher ranoumly selects and intreviews 10 male and 100 female college teacher. type of sampling technique?

196. ## math

what is 320/380 (or in fraction term) in lowest terms? and what is 54 over 126 in lowest terms?

197. ## math

how is the speed of a falling object determined.

198. ## geometry

The length of a rectangular garden is two feet less than five times the width. If the perimeter is 72 feet, what is the length of the garden?

199. ## English

These are the very last sentences of the day. Thank you very much for your help. 1) I know I'll miss working with you. She is going to change job. 2) She suggested going to the cinema rather than to the theatre. Do you remember seeing that man before? 3)

200. ## chemistry

How many grams are required to make 1.5 L of 3.0 M hydrochloric acid (HCl) solution?

201. ## Math

How much did you invest each month at 6.60% compounded monthly if 25 years later the investment is worth 228190.50?

202. ## math

can someone help explain how to do this? allen has nickels dimes and quarters in his pocket. the number of nickels is 1 more than twice the number of quarters. the number of dimes is 1 less than the number of quarters. if the value of change in his pocket

203. ## math

how to write 28th march 2011 in 5 letters without using number

204. ## Math

Ms Sue i did not understand ".65 *0=" How about 14% of 56?

205. ## Math

Find the standard deviation for the given data. Round your answer to one or more decimal places than the original data. 3){15,13,31,42,58,78} A)534.3 B)23.1 C)36.5 D)39.5

206. ## To Ms. Sue

Ms. Sue could you please read my essay and tell me if it's good? I don't have time to rewrite it, would just like to know your opinion about it.

207. ## aims math<<<<need some one to check my answer

okay this problem is simple... well my answer im unsure the answers i get arent an option. the problem is: 37-3[5+4(3-7)]

37-3[5+4(3-7)] this problem is getting me frustrated because the answer come up with is not an option. i come up with -1224. 145,70,28,and 4

209. ## english

I am doing something called "Mystery word match". you have to combine all three words to make another word. renovate activity motion Bones do_ _ _ _ _ _ _ _ (8 letters)

210. ## chemistry

the rate constant for the reaction is 0.152 s_-1 at 27 degree the rate constant increases to 0.304 s _-1 at 37 degree what is the value of energy of activiation for the reaction?

211. ## english

How can I condense these two sentences into one sentence? Carl is using a defense mechanism known as displacement. Displacement is the transfer of an emotion from its original focus to another object, person, or situation.

212. ## math

factor the polynomial: x^2 + 6x + 9

213. ## physics

a projectile is shot up 25 m/s at an angle of 34 degress how high imto the air does the projectile go?

214. ## English

I forgot to include the following sentences on the same subject. Thank you for checking them. 1) The turning point of World War II came in 1941: Hitler, ignoring his pact, attacked Russia in June, and the Japanese, in December, attacked the American naval

215. ## survey of science

if a automobile with a mass of 500kg hits another car that has a mass of 650kg produces a force of 1800n, find the acceleration

216. ## math

how do I find the rules for input output division tables

217. ## english 10

Every sentence in the paragraph below violates some principle of good persuasive writing. Revise the paragraph, following the directions at the end of each sentence; use your imagination where necessary. Type the revised paragraph in the text box provided

218. ## English

I included the five statements I was not sure of. Thank you for helping me. 1) The turning point of World War II came in 1941: Hitler, ignoring his pact, attacked Russia in June, and the Japanese, in December, attacked the American naval base of Pearl

219. ## math

Double my tens digit to get my ones digit. Double me and I am less than fifty.

220. ## marketing,,,i need you help

is anyone can help me to get an idea for this question.. how does a firm corporate cultur influence the performance of its personnel? relate the anwer to a small catering business that caters to corporate accounts.

221. ## omt101

A wire when bent into the form of a square encloses an area of 12 sq.cm. if the wire is bent in the form of a circle, then what would be the area?

222. ## Chemistry Molarity

What is the concentration, in units of molarity, of a 500mL solution containing 0.750 moles of sodium chloride in water?

223. ## social studies(history)

1 – Tanzimat ile Meşrutiyet yönetimlerinin Osmanlı İmparatorluğu’nda meydana getirdikleri temel değişiklikleri yazınız. 2 – İttihat ve Terakki yöneticilerinin I. Dünya Savaşı’ndan beklentileri nelerdir. 3 – Çanakkale

224. ## math

lim x->1 [(sqrt10-x)-3]/[1-(1/x)] Help please, Thankyou

225. ## Chemistry

How to prepare 1000 nM stock solution using Tam (1 gm) Mol Weight=563.6

226. ## Physics

During a car race two cars,a ferarri and a mercedes crashed.The ferarri was travelling at a speed of 340km/h an the mercedes was travelling at a speed of 230km/h.What is the resultant crash

227. ## English

Is it okay if I use your cellphone? 1. I'm sorry, but it's broken. 2. I'm sorry, but it is out of battery. i need to charge it. 3. i'm sorry, but I can't use it at the moment. Where can I charge my cellphone. 4. i'm sorry, but it's not mine. I have to

228. ## English

1. He may have gotten up late. 2. He may have a fever. 3. He may be running towards school. 4. he may have forgot to come to school. 5. He may have overslept. 6. He may be spending time playing computer games in a PC room. 7. He may be upset and doesn't

229. ## Math

y= x-7 3x+6y=-6 I don't understand how to solve for the x-variable.

230. ## math

Find percent of number: 64% of 50

231. ## Ap english language composition

write a five paragraph stylistic analysis essay about the story "Hills Like White Elephants" written by ernest hemingway

232. ## math

Which kind of graph will not let you calculate the range? Is it a bar graph, line graph, circle graph, or a pictograph?

233. ## converter

One foot is equal to how \$many inches ?

234. ## science

Why is sucrose covalent but have ionic like characteristics? I am so confused I am doing a lab and i have no idea!

235. ## math

Ruth sells cars. She receives a commission of 12% on sales up to \$35,000 and a commission of %24 on sales over \$35,000. What is Ruth's commission if she sold a car for \$50,000?

236. ## chemistry

Besides actin and myosin, what is another example of a Contractile Protein? If you could tell me about its function too, that would help too. Thanks

237. ## science

Imagine a marble dropped from a tall building at 1.62 meters per second. How long would the marble be in the air. Velocity= Gravitational acceleration x time

238. ## math

The mean weight of 75 2nd graders is 55.7 lbs and the mean weight of 25 1st graders is 42.6 lb. What is the mean weight of the 100 children

239. ## Math

The mean weight of 75 2nd graders is 55.7 lbs and the mean weight of 25 1st graders is 42.6 lb. What is the mean weight of the 100 children

240. ## french 2

-FRENCH 2- i am having a lot of trouble with l'imparfait et le passe compose-talking about actions in the past- and i need some tips on how to study.... anyone got suggestions? im open to anything. thank you very much! :)

241. ## FP/101

Discuss some positive steps you can take to manage debt.

242. ## Essay

Im doing an essay and this is the format for it. Intro of 5 or more sentences, where you introduce your thesis statement(that which you will be writing about - in the form of a statement, or point of view) Two or three paragraphs, of about 8-10 sentences

243. ## Calculus B

The Antiderivative of: x(arctanx)dx It's clearly integration by parts with u=arctanx and dv=x, but after that I go down hill. HELP!

244. ## Math

Find the vertical and horizontal asymtotes of y=1/x^2+6x+9

Sam and David are among 5 students who have a chance to win a free airline ticket to San Diego. 2 students from the group will be selected at random to win a ticket. What is the possibility that the 2 students selected will be Sam and David?

246. ## omt101

Draw three differently shaped cross sections of an ellips

247. ## Physics

An object initially at a temperature of 80 C cools by 1 C in a time of 15 s when placed in a 20 C room When the object's temperature reaches 50 C, what is the average rate at which the object cools?

248. ## Physiology

What condition triggers its release(e.g., glucose in blood) 1.Thyroid hormone 2.ADH 3. Aldosterone 4. Epinephrine 5. Melatonin 6. Estrogen

249. ## stressed and unstressed syllables

how do you know a stressed or unstressed syllable

250. ## chemistry

To culinary experts and to the average person the term “Extra Virgin” has a ring of exclusiveness and quality to it. When it comes to olive oil, exactly what does this term signify? I am supposed to explain the chemistry behind Extra Virgin Olive oils,

251. ## math

how is the size of a parallelogram related to the size of to trapezoid

252. ## Algebra 2

If y is inversely proportional to x and y=12 when x=2, what is the value of x when y=3? A. 2 B. 3 C. 8 D. 12

253. ## physics

charging by induction creates charge by transferring charges from one object to another OR separates charges within an object

254. ## math

In 1000 samples, assuming that the null hypothesis is true, how many times would you expect to commit Type I error if alpha=.05?

255. ## Algebra 1

Bunson Burner has 3 liters of a 10% acid solution. How much of pure acid must be added to produce a 50% acid solution?

256. ## Physics

A spring has a spring constant, k, of 441 N/m. How much must this spring be stretched to store 22 J of potential energy?

257. ## Physics

What does the symbols u and u' stand for?

258. ## english

what other ideas does Tom Corbett have in place to save money in PA?

259. ## calculus

find the derivative of F(x)=x^2-4/1+lnx

260. ## Science

What is a habitat?

261. ## math

I am less than 100. The sum of my didgits is 4. Half of me is an odd number.

262. ## college

How much I2 is needed to stop decomposition of H2O2?

263. ## Calculus B

Find lim as x goes to 0 of (xsinx)/(1-cosx)

264. ## Science

How many times a year does the moon go through its cycle or phases?

265. ## Math

In the set of whole numbers is 4-9 meaningful

266. ## math

if right angle haveing perimeter=36,diagnol=15 then area=?

267. ## History

List the 4 goals of the Civil Rights Act of 1964 IN YOUR OWN WORDS!

is anyone can help me please for this question. why are supplier an mportant uncontrollable factor for many companies?

place a comma in this sentences since pete was always online playing computer games Andy decided to buy his own computer

place a comma in this sentence convinced that she would need extra money for college,Andrea applied for a second job at the libary

271. ## Need Websites

Does anyone know good videos that teach you what Stock markets are and stuff - Childlike videos with simple terms would be great. Thanks in advance!

272. ## Math

A baseball manufacture checked 250 of its baseballs and found that 8 were defective. About how many would be defective out of 4500 baseballs? Could someone explain to me how to do this

273. ## Science

Hello van some one show me how to draw a dot and cross diagramm for 1 lithium atom and 1 fluorine atom(Lif) and also a diagram for 1 magnesium atom and 1 oxygen atom (MgO) Thankyou Paul.

274. ## history

discuss the america 'third world counteroffensive' from 1979- 1989. was this in retospect, beneficial for the united states and the world in general?

275. ## math

I need to know when you have lettets how csn you deternine what the numbers will be. Ex: GRAPE - PLUM = APPLE. How would I he able to know what numhers represent the letters? Thanks

276. ## math

jodi said that two congruent triangles that each have a base of 10 inches and a height of 6 inches is he correct

277. ## English

I included a few more sentences I'm unsure of. The last refer to the UK in the 20s. 1) I subscribe ( subscribed?) to Sky to watch English channels. I'm disgusted with this soup. 2) I was disgusted by the news (not with the news?) of the Prime Minister

When we have too much work to do we become very anxious It is vital to set priorities and work on the most important things first. What does the second sentence do? a. It gives an example b. It makes a contrast c. It proposes a solution* d. It states an

279. ## sociology

i have to submit a paper on a similair artical about wal-mart failing in germany

280. ## physics

while many properties are similar, one important difference between electric and gravitational forces is that unlike gravity, electric charge: a)can be transferred b) objeys an inverse-square law

281. ## English

I left out a very last sentence. Thank you very much! 1)Do you always make breakfast by yourself? To tell the truth, I sometimes have it made by my mum. Is it also possible: Do you always make yourself breakfast?

282. ## science

Scientists performed an experiment to determine whether there is a connection between learning ability and food. They took two groups of 20 mice each, all from the same purebred strain. The mice were deprived of food for 3 days and then given a standard

283. ## english

How might readers react if the topic sentences in an essay did not coincide with the supporting points, and why would their reaction be justified?

284. ## physics

The weight of an object changed by +25.0%. The object's final weight was 2.5 grams. What is the initial weight of the object?

285. ## Algebra II

Please help-I'm totally lost- What is the equation of the ellipse with foci(-10,0), (10,0) and co-vertices (0,-3),(0,3) x^2/109 + y^2/9 = 1 X62/100 + y^2/9 = 1 Please show me the steps because I have others to do and I'm really stuck

286. ## english

How can I make this into two sentences? Note: Ending the first sentence in book. Carl shows self-hatred also known as the death drive in the book when he says, "I hate my life. I want to die right now" (67).

287. ## math

you have a \$5841 credit card debt, and you plan to pay it off through monthly payments of \$71. if you are being charged 14% interest per year, how long will it take you to repay your debt?

288. ## History

My teacher wants me to tell her what the climate is like in alaska but i cant seem to find anything about it in simple terms.... what is a good way to put it?? PLEASE HELP ME

289. ## calculus

find the derivative of s(t)=(1+e^t)ln t

base 1=22in base 2=20in height=25in whats the area

291. ## precalculus

log 60 4 estimate the following log

292. ## Science

Compare an astronauts weight in orbit with the astronauts weight on Earth, assuming the mass of the astronaut doesn't change.

293. ## Calculus B

Prove: lim as x goes to 0+ of x^(sinx)=1

294. ## math

If you multiply me by 2, I become a number greater than 20 and less than 40. If you multiply me by 6,I end in 8. If you multiply me by 4 I end in 2.

295. ## Math

Mike and Ben split the cost of a new lawn mower. The regular price of the mower was \$360. They used a 15% off coupon. They paid 6% tax on the reduced price of the mower. In dollars and cents how much did each pay?

296. ## math

what is the base of a triangle that has a heigt of 17 and an area of 51

297. ## Essay - Changed some things

Im doing an essay and this is the format for it. Intro of 5 or more sentences, where you introduce your thesis statement(that which you will be writing about - in the form of a statement, or point of view) Two or three paragraphs, of about 8-10 sentences

298. ## science

How many times a year does the moon go through its cycle or phases?

299. ## math

the new price is \$42 and the old price was \$56, what is the percent of decrease?

301. ## math

What is the median of this set? {π, √25, 15%, √15, 10/4 }

302. ## physics

all electric charges are multiples of the charge on an electron, or atom?

303. ## Science

Explain- how would the gravitational force between Earth and the Moon change if the distance between them increased?

304. ## math

The number of Sophomores who eat lunch in the caeteria is about three-fouths the number of Freshmen. If there are 60 more Freshemen than Sophomores, how may Sophomores eat lunch in the caafeteria?

305. ## physics (Science)

If a bee flew 27 centimeters in 10 seconds what would its speed be?

306. ## math

symplify the expression if possible: e^3

307. ## trig

y=1/4 cos (2/3 x +3 pi )

308. ## Algebra

Hello. I am trying to figure out how to find the number of solutions in the following problem: (x + 8) (x + 8) = 0

where do u think the commas belong? in fact most students find it hard to sleep past 6:00A.M. during the semester,so you as well take 8:00 classes

310. ## math

what is thename for the point where the three altitudes of a triangle are concurrent?

311. ## algebra

in need of help..;(.my question is find the vertex..y=x(x+7)

312. ## math

a rectangle measures 10ft by 12 ft ,if there is anothere rectangle that is congruent to the one described ,how long are its sides?

313. ## Biology.

Why are glycolen and starch good storage materials?

314. ## calc

hi im totally blanking how do i find the antiderivative of cos(0.5(x^2))? thanks!

315. ## math

what part of a day is 45 minutes?

316. ## Math

The mean weight of 75 2nd graders is 55.7 lbs and the mean weight of 25 1st graders is 42.6 lb. What is the mean weight of the 100 children?

317. ## science

items that change from a chemical to thermal energy

318. ## home economics

IMPORTANCE OF ELECTRICITY TO THE DEVELOPMENT OF HOME ECONOMIS

319. ## Math

Repeated sample of 36 are drawn from a population with mean 52 and standard deviation 18. What is the standard deviation of the distribution of the sample means?

320. ## math

what is the perimeter value of r=a(1+cos theta)

321. ## Living on your own

What would the greatest financial challenge in living on your own be? I'm guessing that would be paying off utilties, bills, grocery.