# Questions Asked onFebruary 4, 2013

1. ## Spanish

Completa las siguientes oraciones con una palabra de la misma familia de la palabra subrayada. Usa la forma correcta de cada palabra. 1.) Cuando te (enfermas), te sientes (fill in blank) y necesitas ir al consultorio para ver a la (fill in blank). I have

2. ## Physics

At what rate will a pendulum clock run on the Moon, where the acceleration due to gravity is 1.63 m/s2 , if it keeps time accurately on Earth? That is, find the time (in hours) it takes the clock’s hour hand to make one revolution on the Moon. provide

3. ## Chemistry

Complete the charge balance equation for an aqueous solution of H2CO3 that ionizes to HCO3^- and CO3^2- ______ = ______ + _______ + _______ Given choices: [HCO3^-],[CO3^2-], [OH^-], 2[H^+], [H2CO3], 2[CO3^2-], 3[H^+], {H^+] I don't understand how to do

4. ## Trigonometry

Surveying A surveyor wishes to find the distance across a swamp. The bearing from A to B (Segment AB is opposite side of triangle) is N 32° W. The surveyor walks 50 meters from A to C, and at the point C the bearing to B is N 68° W. (Segment AC is

5. ## Trigonometry

An observer in a lighthouse 350 feet above sea level observes two ships directly offshore. The angles of depression to the ships are 4° and 6.5°. How far apart are the ships?

4. List all of the quadrilaterals with exactly one pair of parallel sides. (1 point) parallelogram; trapezoid rhombus; parallelogram; rectangle trapezoid rhombus;, square; rectangle 5. List all of the quadrilaterals with four right angles. (1 point)

Do you have a copy of the sentence check 2 questions for chapter 20 in the 4th edition of Improving Vocabulary Skill book by Sherrie L. Nist?

8. ## Trigonometry

A plane is 160 miles north and 85 miles east of an airport. If the pilot wants to fly directly to the airport, what bearing would be taken?

9. ## Chemistry

What is the activity coefficient of H^+ in a solution containing 0.073 M HCl and 0.0090 M Ca(ClO4)2? What is the pH of the solution? I believe I have to find the ionic strength of the solution first, but I don't know how to find it when 2 solutions are

10. ## college mathematics

Three people are to be selected at random, each will be given one gift card. There is one card from Home Depot,one from Best Buy and one from Red Lobster. The first person selected will get to choose between the two remaining cards. The third person

11. ## Algebra 1 I need help!!!!!!!!!!!!!!!!

8.A number raised to a negative exponent is negative. Is it always , never, or sometimes. 7. Evaluate 1/2a^-4b^2 a = -2 and b = 4 remember a^to the negative 4 6. Simplify. Write in scientific notation. (9 x 10^-3)^2 Thanks to anyone who helps right away

12. ## Finance

Sheryl’s Shipping had sales last year of \$15,000. The cost of goods sold was \$7,500, general and administrative expenses were \$2,000, interest expenses were \$1,500, and depreciation was \$2,000. The firm’s tax rate is 30%. a. What are the earnings

13. ## math

4. Which view allows you to see the top, front, and right sides of a model? front top base plan isometric

14. ## Physics

You weigh 710 N. What would you weigh if the Earth were seven times as massive as it is and its radius were six times its present value? Answer in units of N

15. ## physics

a string of cross section 2 cm^2 is doubled in length by the application of a longitudinal force 2*10^5dynes.the young"s modulus is: 1.10^5 dyne/cm^2

16. ## Trigonometry

A ship is 50 miles east and 35 miles south of port. If the captain wants to sail directly to port, what bearing should be taken?

17. ## Physics

A small ball rolls horizontally off the edge of a tabletop of height h. It strikes the floor a distance x horizontally away from the edge of the table. (Use any variable or symbol stated above along with the following as necessary: g.) (a) How long is the

18. ## Trigonometry

Height of a Kite A 100-foot line is attached to a kite. When the kite has pulled the line taut, the angle of elevation to the kite is approximately 50°. Now everybody lets approximate the height of the kite!

19. ## Geography

What is absolute location? A.a precise measure of where a location falls in terms of longitude and latitude using units such as minutes and seconds B.a precise measure of distance around the equator C.a more precise measure of where a location falls in

20. ## maths

Find five numbers in A.P. whose sum is 12.5 and the ratio of first to the last is 2 : 3.

21. ## Math

An airplane is flying due west at a velocity of 100 m/s. The wind is blowing out of the south at 5 m/s. What is the magnitude of airplane's resultant velocity?

22. ## physics

a wire whose cross-sectional area is 4mm^2 is stretched by 0.1 mm by a certain load.if a similar wire double the area of cross-section is under the same load,then then elongation would be ans: 1)0.05mm

23. ## PHYSICS

A copper wire and an aluminium wire have length's in the ratio 3:2.diameters n the ratio 2:3 AND FORCES APPLIED IN THE RATIO 4:5 find the ratio of increase in length of the two wires.(Y FOR COPPER =1.1*1O^11 N/m^2,Y for aluminum=0.70*10^11 N/m^2). ans:

24. ## trig Elev. & Depress part ii

You are 55ft from a tree. The angle of elevation from your eyes, which are 4.5 ft off the ground,to the top of the tree is 61 degrees. To the nearest foot, how tall is the tree?

25. ## Trigonometry

A passenger in an airplane flying at an altitude of 10 kilometers sees two towns directly to the left of the plane. The angles of depression to the towns are 28° and 55°. How far apart are the towns?

Alicia has 4 yards of ribbon. She needs 1/3 yard to make 1 bow .How many bows can Alicia make?

27. ## Chemistry

What is the value of q when 8.21g of water vaporizes at 373 K? The enthalpy of condensation of water at 373 K is -40.7 kJ/mol. I tried using the equation q= m x Cs x Delta T, but I never got the right answer which is 18.5 kJ apparently, so I need to find

28. ## physics

when the metal sphere is suspended at the end of a meal wire its extension is 0.4mm. If another metal sphere of the same material with its radius half as the previous is suspended then extension would be ans: 1)0.05mm

29. ## physics

if a stress is numerically equal to young's modulus the elongation will be ans: 1.)equal to the original length. but how?

30. ## Trigonometry

The length of a shadow of a tree is 130 feet when the angle of elevation of the sun is θ°. a) Write the height h of the tree as a function of θ. b) θ=10° What's height? θ=15° Height? θ=20° How tall is the height? θ=25° What is height?

31. ## chemistry

For the reaction below, KP = 1.6 × 106 at 400.0 °C. HCHO2( g ) CO( g ) + H2O( g ) A mixture of CO( g ) and H2O(l ) was prepared in a 2.00 L reaction vessel at 25 °C in which the pressure of CO was 0.177 atm. The mixture also contained 0.391 g of H2O.

32. ## college chem

europium crystallizes in a body-centered cubic cell (the Eu atoms occupy only lattice points). calculate the mass of the unit cells

33. ## Physic

A block (mass 2.4 kg) is hanging from a massless cord that is wrapped around a pulley -3 2 (moment of inertia of the pulley = 1.3 x 10 kg·m ), as the drawing shows. Initially the pulley is prevented from rotating and the block is stationary. Then, the

34. ## Physics/Charges

Point charges Q1 = 50 µC and Q2 = -20 µC are placed 2 meters apart. Where can I put a third charge so that the net electrical force on it is zero?

35. ## Trigonometry

Two fire towers are 30 km apart, tower A being due west of tower B. A fire is spotted from the towers, and the bearings from A and B are E 14° N and W 34° N, respectively. Find the distance d of the fire from the line segment AB.

36. ## Algebra 1

8.A number raised to a negative exponent is negative. Always, never , or sometimes. 7. Evaluate 1/2a^-4b^2 a = -2 and b = 4. 6. Simplify. Write in scientific notation. (9 x 10^-3)^2 Thanks to anyone who helps right away and need right answer from the

37. ## Math

Corinda has 400 feet of square fencing to make a play area. She wants the fenced area to be rectangular.What dimensions should she use in order to enclose the maximum possible area?

38. ## Chemistry

The metal palladium crystallizes in a face-centered cubic lattice with an edge length of 388.8 pm. What is the density of the palladium?

39. ## Physics

According to Anna, on Earth, Bob is on a spaceship moving at 0.8c towards Earth, and Carl, a little farther out, is on a spaceship moving a 0.9c towards Earth. According to Bob, how fast is Carl moving relative to Earth? (a) According to Bob, how fast and

40. ## Chemistry

You decide to establish a new temperature scale on which the melting point of ammonia (-77.75 C ) is 0 A, and the boiling point of ammonia (-33.35 C ) is 200 A What would be the temperature of absolute zero in A ?

41. ## college chem

calculate the amount of energy (in kj) necessary to convert 457 g of liquid water from 0 Celecius to water vapor at 167 celcius. the molar heat of vaporization (Hvap) of water is 40.79 jk/mol. the specific heat for water is 4.187 j/g celcius and for steam

42. ## Environmental Science 11th grade

Discuss economic reasons that have caused many utilities to opt for coal-burning, rather than nuclear-powered, plants

Joshua has 3 yards of ribbon. He needs 1/4 yard to make 1 bow. How many bows can Joshua make? Break down problem.

44. ## physics

A compact car, mass 875 kg, moving south at 16 m/s, is struck by a full-sized car, mass 1660 kg, moving east at 12 m/s. The two cars stick together, and momentum is conserved in the collision. The wreck skids along the ground and comes to a stop. The

45. ## math6

shaunti drove 621miles in 11.5 hours.wht was her average speed in miles per hour?

Alicia has 4 yards of ribbon. She needs 1/3 yard to make 1 bow .How many bows can Alicia make?

47. ## Spanish

7. ¿Cómo se dice en español: The hospital is far from the town? A.) El hospital está cerca del pueblo. B.) El hospital está lejos del pueblo. C.) El hospital está cerca de el pueblo. D.) El hospital está lejos de el pueblo. 8. ¿Cómo se dice en

48. ## Physics, help!!

How do I get the equation T=2pi(sqrt(m/k)) to the linear equation y=mx+b?

49. ## social studies

Which of the following types of information are people LEAST comfortable revealing to professionals? a. emotional b. financial c. legal d. medical

50. ## Spanish

I need to decide if these capitalized words are preterite or imperfect and I just don't get it. Could someone help me out please? Here is the story: I need help with this story. Could you please tell me if the words that are in all CAPITAL letters are

51. ## Statistics

A company manufactures calculators in batches of 64, and there is a 5% defect rate. Find probability of getting at least three defects

52. ## Chemistry

if we mix 25 grams of sodium bromide with a large amount of potassium chloride, what will our theoretical yield of sodium chloride be?

53. ## Trigonometry

Height of a mountain While traveling across flat land, you notice a mountain directly in front of you. The angle of elevation to the peak is 2.5°. After you drive 18 miles closer to the mountain, the angle of elevation is 10°. Approximate the height of

54. ## Math

If it takes 4 minutes to fill a bucket with one tap and 6 minutes to fill the bucket with another tap. Using both taps how many seconds will it take to fill the bucket?

55. ## physics

In a water pistol, a piston drives water through a larger tube of radius 1.00 cm into a smaller tube of radius 1.00 mm. (a) If the pistol is fired horizontally at a height of 1.5m, use ballistics (2-D projectile motion) to determine the time it takes water

56. ## Trigonometry

Angle of Depression Find the angle of depression from the top of the lighthouse 250 feet above water level to the water line of a ship 2.5 miles offshore.

57. ## Physics

A centripetal-acceleration addict rides in uniform circular motion with period T = 4.30 s and radius r = 3.00 m. At one instant his acceleration is a = (4.00 m/s2)i + (-5.00 m/s2)j . At that instant, what are the following values? (a) v · a (b) r x a

58. ## Trigonometry

Wave Motion A buoy oscillates in simple harmonic motion as waves go past. At a given time it is noted that the buoy moves a total of 3.5 feet from its low point to its high point, and that it returns to its high point every 10 seconds. Write an equation

59. ## college chem

calculate the amount of heat (in kj) required to convert 140.1 g of water to steam at 100c

60. ## physics

angel falls the highest waterfall in the world is located in Venezuela. estimate the height of the waterfall assuming that the water that falls the complete distance experiences a temperature increase of .230 degrees Celsius. in your calculation, assume

61. ## Physics ASAP!!

A copper (Cu) weight is placed on top of a 0.24 kg block of wood (density = 0.60 103 kg/m3) floating in water. What is the mass of the copper if the top of the wood block is exactly at the water's surface?

62. ## Physics

The cubit is an ancient unit of length based on the distance between the elbow and the tip of the middle finger of the measurer. Assume that the distance ranged from 43 to 53 cm, and suppose that ancient drawings indicate that a cylindrical pillar was to

63. ## Economics

One supply-side measure introduced by the Reagan administration was a cut in income tax rates. Use an aggregate demand/aggregate supply diagram to show what effect was intended. What might happen if such a tax cut also shifted the aggregate demand curve?

64. ## physices

A sound wave has a wavelength of 3.0 m.? The distance from a compression centre to the adjacent rarefaction centre is:

65. ## Physics

A 20.0 g toy car moving to the right at 21.0 cm/s has a head-on collision with a 34.0 g toy car moving in the opposite direction at 47.0 cm/s. If they begin 396.0 cm apart, how long does it take the cars to collide?

66. ## Physics

The two strands of the helix-shaped DNA molecule are held together by electrostatic forces as shown in the Figure 16-44 in the textbook. Assume that the net average charge (due to electron sharing) indicated on H and N atoms is 0.2e and on the indicated C

67. ## trig

1/tan beta +tan beta=sec^2 beta/tan beta

68. ## Physics

Light-rail passenger trains that provide transportation within and between cities are capable of modest accelerations. The magnitude of the maximum acceleration is typically 1.3 m/s ^2, but the driver will usually maintain a constant acceleration that is

69. ## calc

What rate of interest compounded quarterly will yield an effective interest rate of 8%?

70. ## chemistry

ionic and net ionic equation for sodium carbonate and potassium chloride

71. ## Trigonometry

Mountain Descent A road sign at the top of a mountain indicates that for the next 4 miles the grade is 12%. Find the angle of the grade and the change in elevation for a car descending the mountain.

72. ## college chem

metallic iron crystallizes in a cubic lattice. The unit cell edge length is 287 pm. The density of iron is 7.87 g/cm^3. Calculate the mass (in grams) of one unit cell

73. ## physics

A car starts from rest and travels for 6.0s with a uniform acceleration of 2.7m/s ^2. The driver then applies the brakes, causing a uniform acceleration of -2.0m/s^2. If the brakes are applied for 2.0s, determine each of the following. a.) how fast is the

74. ## physics

The Moon is about 3.8 X 105 km from the Earth. Show that its average orbital speed about Earth is 1026 m/s

75. ## Physics

A +35 µC charge is placed 42 cm from an identical +35 µC charge. How much work would be required to move a +0.55 µC test charge from a point midway between them to a point 8 cm closer to either of the charges?

76. ## physics

A railroad car with a mass of 1.81 104 kg moving at 3.04 m/s joins with two railroad cars already joined together, each with the same mass as the single car and initially moving in the same direction at 1.32 m/s. What is the decrease in kinetic energy

77. ## Trigonometry

Navigation A ship leaves port at noon and has a bearing of S 29° W. If the ship sails at 20 knots, how many nautical miles south and how many nautical miles west will the ship have traveled by 6:00 P.M.?

78. ## physics

two point charges of 2 c and -3c are separated by 6cm what is the magnitude of the electrostatic force between them? and is the force attractive or repulsive? explain and what happens to the magnitude of the force when the distance is increased by a factor

79. ## physics

The British Sovereign coin is an alloy of gold and copper having a total mass of 7.988 g and is 22-karat gold. (a) Find the mass of gold in kg using that # of karats = 24 x (mass of gold)/(total mass). (b) Calculate the volumes of gold and copper used to

80. ## physics

A park ranger shoots a monkey hanging from a branch of a tree with a tranquilizer dart. The ranger aims directly at the monkey, not realizing that the dart will follow a parabolic path and thus will fall below the monkey. The monkey, however, sees the dart

81. ## Physics

In the figure below, a stone is projected at a cliff of height h with an initial speed of 46.0 m/s directed 60.0° above the horizontal. The stone strikes at A, 5.30 s after launching. (a) Find the height, h, of the cliff. m (b) Find the speed of the stone

82. ## equivalent fractions and the numberline

Draw a number line to show how are these fractions are equivalent 3/4=6/8 and 1/4=2/8

83. ## physics

when tension 'F' is applied the elongation produced in uniform wire of length l,radius r is e; when the tension 2F is applied the elongation produced in another uniform wire of length 2l and radius 2r made of same material is ans: 1.)1.0 e

84. ## physics

A heavy crate accidentally falls from a high flying airplane just as it flies directly above a Porsche parked in a car lot. Relative to the Porsche, where will the crate crash?

85. ## math

Carlos will use square floor tile that measure one foot on each side to cover a hallway that is eight feet long and four feet wide.how many floor tile will carlos need

86. ## a person stands on a bathroom scale that rest on t

a person stands on a bathroom scale that rest on the floor of an elevvator. when the elivetor is stationary the scale registers 50kg. when the lift acclelerates up ward the scle registers 60kg .taking g=10m/s^2, the best estimate acceleration of the lift

Tavon has 5 yards of ribbon. He needs 1/6 yard to make 1 bow. How many bows can Tavon make?

88. ## physics

A person driving her car at 56km/hr approaches an intersection just as the traffic light turns yellow. She knows that the yellow light lasts only 20.s before turning to red, and she is 30m away from the near side of the intersection. The intersection is

89. ## Physics

If a pendulum-driven clock gains 5.00 s/day, what fractional change in pendulum length must be made for it to keep perfect time? Please provide explanations and solutions. Thanks in advance :D

5. Which of the following describes the underlined part of this sentence from "LAFFF"? In spite of all I could do, my grades were nothing compared to Peter's. (1 point) simple sentence compound sentence independent clause dependent clause 6. Which of the

91. ## Algebra

As long as x is not zero, x0 is defined to be equal to . Using this definition, 30 = , (7x4)0 = , and −5x0 =

92. ## physics

Bert is standing on a ladder picking apples in his father's orchard. As he pulls each apple off the tree, he tosses it into a basket that sits on the ground 2.5 m below at a horizontal distance of 1.9 m from Bert. How fast must Bert throw the apples

93. ## Inkambeni p school

How many kilometres on the ground is 3 cm distance on the map of south africa

asked by Map of south africa
94. ## math

The graph of a function is horizontally compressed by a factor of 5 and vertically compressed by a factor of 2 Find an equation for this compressed function in terms of the function f(x)

95. ## maths

A man borrows Rs 18000 at 5% per annum compound interest .If he repays Rs 6000 at the end of the first year and Rs 8000 at the end of the second year; how much should he pay at the end of the 3rd year in order to clear the account?

You decide to establish a new temperature scale on which the melting point of ammonia (-77.75 C ) is 0 A, and the boiling point of ammonia (-33.35 C ) is 200 A What would be the temperature of absolute zero in A ?

97. ## math

Draw q number line to show these fraction are equivalent 3/4=6/8 and 1/4=2/8

98. ## Algebra 1

8.A number raised to a negative exponent is negative. Is it always , never, or sometimes

99. ## algebra

What is the range of the inverse of relation {(1, 7), (2, -4), (5, 6), (2, 8)}? A. {1, 2, 5} B. {-4, 6, 7, 8} C. {1, 5} D. {-4, 7, 8} B

100. ## Math

Select all that justify the following statement. 2 * 1/2 = 1

101. ## math

Two people want to share 4/3 feet of rope equally. What length of rope should each person get?

102. ## Physics

A rocket is launched from rest and moves in a straight line at 42.5 ° above the horizontal with an acceleration of 62.5 m/s2. After 32.0 s of powered flight, the engines shut off and the rocket follows a parabolic path back to earth. Find the time of

103. ## statistics

Suppose that, in fact, the blood cholesterol level of all men aged 20 to 34 follows the normal distribution with mean of u = 188 milligrams per deciliter (mg/dl) and standard deviation = 41 mg/dl. 1. Choose an SRS of 100 men from this population. What is

104. ## Chemistry

The complete combustion of 1.00 ml of octane increases the temperature by 22.7 degrees celsius. The density of octane is 0.7g/mL. What is the efficiency of the octane in heating the water?

105. ## Physics

Mars has a mass of about 6.59 × 1023 kg, and its moon Phobos has a mass of about 9.4 × 1015 kg. If the magnitude of the gravitational force between the two bodies is 4.35 × 1015 N, how far apart are Mars and Phobos? The value of the universal

106. ## Math

A photograph is 25 cm and 20 cm high. It must be reduced to fit a space that is 8 cm high. Find the width of the reduced photograph.

107. ## communication

Please HELP!! Question 1 of 20 5.0 Points Which of the following would be the LEAST appropriate in the closing paragraph of a negative message? A. "Let us know if model #A01 would be a suitable substitution." B. "Our layaway plan will enable you to

108. ## physics

there are two wires of same material.their radii and length are both in the ratio 1:2.if the extensions produced are equal, what is the ratio of the load ? ans: 1)1:2

109. ## math

the length of a rectangle is 5cm longer than its width and its area is 66cm square. find the perimeter of the rectangle

110. ## Physics

The radio station WBRU broadcasts in the radio spectrum at 95.5 MHz. What is the wavelength of this electromagnetic wave in meters?

111. ## Biology

6. Describe and explain what would happen to a cell containing 100mM NaCl, 150 mM glucose, and 100 mM protein if placed into: a) distilled water? (describe the volume change if the cell were permeable to water only). b) a solution of 100mM NaCl, IF the

112. ## Physics

A bicyclist is riding at a tangential speed of 13.9 m/s around a circular track with a radius of 38.4 m. If the magnitude of the force that maintains the bike’s circular motion is 378 N, what is the combined mass of the bicycle and rider? Answer in units

113. ## Spanish

1. ¿Cómo se dice en español: I want to sleep? a. Yo quiero duermo. b. Yo quiero dormir. *c. Yo quiero duermes. d. Yo quieres dormir. 2. ¿Cómo se dice en español: He needs to do his homework? *a. Él necesito hace su tarea. b. Él necesitar hace su

114. ## math

what would 51/2% be the tax rate expressed as a decimal

115. ## Physics

A rocket was launched and it now has an acceleration of 3m pers second squared upwards.the mass of the rocket is 5000kg.calculate the net force acting on the rocket and the upthrust exerted by the exhaust gases on the rocket.

116. ## Finance

Orbital Communications has operating plants in over 100 countries. It also keeps funds for transaction purposes in many foreign countries. Assume that in 2010 it held 100,000 kroner in Norway worth \$35,000. The funds drew 12 percent interest, and the krone

117. ## physics

A 52.5g super ball traveling at 28.0m/s bounces off a brick wall and rebounds at 18.5m/s. A high speed camera records this event. If the ball is in contact with the wall for 4.10ms, what is the magnitude of the average acceleration of the ball during this

118. ## physices

The light beam shown in the figure on the right makes an angle of 20.0° with the normal line NN’ in the linseed oil. Determine the angles θ and θ’. (Note: The index of refraction of linseed oil is 1.48.)

119. ## physics

Car A, with a mass of 1250 kg, is traveling at 30 m/s to the east. Car B is a truck with a mass of 2000 kg, traveling to the west at 25 m/s. Assume these two vehicles experience an inelastic collision but do not stick together, and Car A goes off 10 m/s to

120. ## chemistry

a 0.25 mol sample af neon gas at 18 C and 0.700 atm is heated to 40 C. the new gas pressure is 1.11 atm. what is the change in volumn of the neon gas?

121. ## science

Design a pseudocode and a flowchart to input three numbers,find their total and average,and print both numbers.

122. ## Physical Education

What is the difference between physical and motor fitness? Thank You

There are 30 books in a bookcase. The books in the bookcase are all poetry, history, and art books. Ten of the books are art books. There are 6 fewer poetry books than history books. How many poetry books are in the bookcase?

124. ## Math

Can a triangle have parallel line segments. And is any line segment in the drawing parallel to the line segment AB? The figure is.a triangle

A traverse with five sides has interior angles with the following measures: 121deg 45 min: 118 deg 25 min; 87 deg 32 min; 98deg 34min, and 113 deg 54 min. Does the traverse close? If not, determne the error in the traverse.

126. ## CHem Help!!!!

What Celsius temperature will the Fahrenheit thermometer be 4-times more than on the Celsius thermometer?

127. ## Environmental Science 11th

Compare the outlook regarding the use of nuclear power in the United States and globally in each of the following decades: 1960s, 1970s, 1980s, 1990s, and early 21st century.

128. ## FSU

SUBSHELL BLOCK THAT BEGINS TO FILL AFTER 4S2

129. ## chemistry

The nuclear reaction Sn ¨ Sb + ? is an example of

A rectangle with a length of 4/9 foot and a width of 2 feet

131. ## Chemistry 12

The complete combustion of 1.00mL of octane increases the temperature of 250.00g of water by 22.7 degrees Celsius. The density of octane is 0.70g/mL. What is the efficiency of the octane in heating the water? I attempted this question and I have -400

132. ## Physics

A bicyclist is riding at a tangential speed of 13.9 m/s around a circular track with a radius of 38.4 m. If the magnitude of the force that maintains the bike’s circular motion is 378 N, what is the combined mass of the bicycle and rider? Answer in units

133. ## Economics

There are 10 identical consumers whose demand is D: p = 20 - 10q. There are 10 identical firms, each firm's marginal cost is MC(q)= 5 + 5q. The market is competitive. a) derive the market demand function b) derive the market supply function c) what is the

134. ## algebra

determine the given quadratic function has a minimum valueor maximum vale. Then find the coordinates of the minimum or maximum point. f(x)=x^2=2x-9

135. ## English

Which of the following sentences is punctuated correctly? Most of Alaska averages a population density, of under, 3 people per square, mile Most of Alaska averages a population density of under 3 people per square mile. Most of Alaska, averages a

136. ## Math

Please help with the following questions: 1. write 12 million in scientific notation 2. Write 17,600 in scientific notation 3. write 1.2 * 10 to the fourth power in standard form 4. write 5 * 10 to the sixth power in standard form

137. ## AIG MATH

A fruit seller has an equal number of apples and oranges.He sold 109 oranges and 45 apples.The number of apples left is 5 times the number of oranges left.What is the total number of fruit he had at first?

138. ## Physics

The electric field intensity at a point 2m from the surface of a uniformly charged conducting sphere is 1920 N/C. At a point 4m from its center, the electric field intensity is 3000 N/C. a.) Determine the radius of the sphere. Determine the electric field

139. ## Math

Journal 5. Look at the hundred chart. One number is wrong. Cross out that number and write the right number instead. Then explain how you know. The chart shows the numbers 17,18, and 19 going across then it shows the square blank then 28,29 finally it

140. ## Physics

Calculate the period of a ball tied to a string of length 0.8 m making 4.1 revolutions every second. Answer in units of s

141. ## Algebra

The sum of the squares of two consecutive positive even integers is one hundred sixty-four. Find the two integers.

142. ## physics

a metallic ring of radius 'r' and cross sectional area is fitted into an wooden circular disc of radius R (R greater than r).If he young's modulus of the material of the ring is Y, the fore with which the metal ring expands is : ans: 1.AY(R-r)/r

143. ## Math

Find x in triangle Exterior is 120 degrees and 20 degrees Find interior x 180 degrees total

144. ## Maths

In a regular polygon,each interior angle doubles its corresponding exterior angle,find the number of side of the polygon?

145. ## physics

in the searler's metod to determine the young's modulus of a wire , a steel wire of length 156cm and diameter 0.054cm is taken as experimental wire. the average increase in length for 1 1/2 kg wt is found to be o.o5o cm.Then young's modulus of the wire?

146. ## Environmental science 11th

Describe how energy is produced in a nuclear reaction.

147. ## art

Co,plemenentary colours lie opposite each other on the colour wheel when the pigments of two complementary colour are mixed together it will resilt in z neural grey-black

148. ## Physics

A particle is traveling in a straight line at a constant speed of 28.5 m/s. Suddenly, a constant force of 12.0 N acts on it, bringing it to a stop in a distance of 61.9 m. (a)Determine the time it takes for the particle to come to a stop. s (b) What is its

149. ## Chem Help!!!!

What Celsius temperature will the Fahrenheit thermometer be 4-times more than on the Celsius thermometer? At what Celsius temperature will the numerical reading on the Fahrenheit thermometer be 1/9 that on the Celsius thermometer?

150. ## College Algebra

I have a few problems I need help with and also do have multiple choice. If I can have an explanation of how to get the answer that would be great. 1. Use the discriminant to determine whether the given equation has two irrational roots, two rational

151. ## math

A recipe calls for three cups of cheese to make nachos for six people. How much cheese is needed to make nachos for two dozen people? Please answer and explain.

152. ## chemistry

net ionic equation for KI+Na2So2O3+KCl

153. ## Thank you!

I would just like to say thank you to all of the tutors/helpers that elp us when we need help on our homework. If i could i would pay you. :)

154. ## Pre-AP Science

an atom consists of 10 neutrons ,10 electrons,and 9 protons. The atom has gained an electron resulting in a charge of -1. What is its mass number?

155. ## Calculator Question

how do I input ln7/ln2/5600 correctly in my calculator to get 2900 as my answer?

156. ## Science

In lab the other day we did an acid/base extraction to separate mixtures. The top layer of the mixture is the organic layer, which consists of diethyl ether and fluorine. The bottom layer is considered to be the aqueous layer, which consists of water and

157. ## algebra

Which of the following relations is a function? A. {(5, 2), (3, 2), (4, 2), (5, 1)} B. {(1, 2), (1, 3), (2, 1), (3, 4)} C. {(1, 3), (2, 6), (3, 8), (1, 7)} D. {(1, 4), (8, 9), (10, 11), (12, 12)} I say c

158. ## Spanish

5. ¿Qué haces en el gimnasio? *a. Hacen ejercicio. b. Hacer la tarea. c. Hago ejercicio. d. Hacemos estudiar. 6. ¿De dónde vienes? a. Vienes de la heladería. b. Vienen de la heladería. *c. Vamos a la heladería. d. Vengo de la heladería. Español I:

159. ## chemistry

when 2.31 moles of sulfur hexafluoride are synthesized from te elements, how many grams of fluorine were used

160. ## Chem

when 2.31 moles of sulfur hexafluoride are synthesized from te elements, how many grams of fluorine were used PLEASEEEEE HELPPPP MEEE!

161. ## chemistry

A fixed mass of gas has a volume of 440cm3 at 13degree cetigrate and 836mmhg.calculate its volume at s.t.p.

162. ## Language art

Just this one question please . 1.According to the MLA style, how should you format the title of a magazine article? A . In italics B. in quotation marks C. With underlining Please thankyou and anyone who has taking this please can you give me the correct

163. ## physics

Find the vectors.sum of ihe three vectors A=-3i-2j+7k, B=i+3j+k, C=-k

164. ## pHYSICS

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

165. ## Physics

a projectile is fired horizontally outward from the top of a table. the initial height of the bullet above the ground is 1.5 meters and the bullet travels a horizontal distance of 3.0 meters before striking the ground.

166. ## physics

Boxcar A, with a mass of 1500 kg, is travelling at 25 m/s to the east. Boxcar B has a mass of 2000 kg, and is initially at rest. The boxcars collide inelastically and move together after they get stuck. What is their combined velocity?

167. ## math

The area of a rectangle is 45 square inches. One dimension is 5 inches. What is the perimeter?

168. ## Chemistry

Fe 3+ + scn- + Na2PHO4 produces what exactly?

169. ## Precalc

1. Prove sin - cos +1/ sin + cos - 1 = sin +1/cos 2. 1+ sin/ 1- sin = (sec + tan)^2 Thanks!!

170. ## Applied Calculus......

Use the method of bisection to find the root of the equation x^5 + 3x − 7 = 0 accurate to two decimal places.

171. ## Physics

Planet X has six times the diameter and seven times the mass of the earth. What is the ratio gX : ge of gravitational acceleration at the surface of planet X to the gravitational acceleration at the surface of the Earth?

172. ## Physics

The mass of a certain neutron star is 1 × 1031 kg (5 solar masses) and its radius is 5500 m. What is the acceleration of gravity at the surface of this condensed, burned-out star? The value of the universal gravitational con- stant is 6.67 × 10−11 N ·

173. ## Physics

the area of cross section of a wire is 1/100000 m^2 length of the wire is increased by 0.1% a tension of 1000N is produced.the young's modulus of the wire will be? ans: 1.10^11 N/m^2

174. ## physics

Boxcar A, with a mass of 1500 kg, is travelling at 25 m/s to the east. Boxcar B has a mass of 2000 kg, and is initially at rest. The boxcars collide inelastically and move together after they get stuck. What is their combined velocity?

175. ## physics

an aluminium rod has a breaking strain 0.2%.The minimum cross section area of he rd in m^2 in order to support a load of 10^4N is if young's modulus is 7*10^9 N/m^2 ans: 1.) 7.1*10^-4

176. ## physics

A sonar signal of frequency 1.00 106 Hz has a wavelength of 1.40 mm in water. (a) What is the speed of the signal in water? (b) What is its period in water? (c) What is its period in air?

what is the estimated quotient of 6 divided into 75?

178. ## physics

The planet Jupiter is more than 300 times as massive as the Earth But it so happens that a body would scarcely weigh three times as much on the surface of Jupiter as it would on the surface of Earth. Can you think of an explanation for why this is so?

179. ## Statistics

A bag contains two blue, three purple, four yellow, two red, three green and one orange marbles.p> What is the conditional probability that, without replacement, the second marble is purple given that the first marble is green?

180. ## Math

Express as a function of two variables. An open box is to contain a volume of 12 cubic meters. Given that the material for the sides of the box costs \$2 per square meter and the material for the bottom costs \$4 per square meter, express the total cost C of

181. ## Physics

The electric field intensity at a point 2 meters from the surface of a uniformly charged conducting sphere is 1920 N/C. At a point 4 meters from its center, the electric field intensity is 3000 N/C. a.) Determine the radius of the sphere. Determine the

182. ## History

How did the issue of tariffs threaten to tear the Union apart?

183. ## Chemistry

Find the Concentration of CrO4^2- in 0.0033M Ba(NO3)2 saturated with BaCrO4. Include activity coefficients in your solubility-product expression. Ksp of BaCrO4 = 1.17 x 10^-10 I have no idea what to do to solve this :(

184. ## Physics

A train with a mass 5x10^5 kg is moving with a speed 80km/hr. If the train stops in 2min...1)What is the acceleration of the train? 2) What is the braking force applied to the train?

185. ## chem

If 20.5 mL of a 5.256 M solution of benzoic acid is used in an experiment similar to experiment 4, how many grams of benzoic acid is in the starting solution? (molar mass of benzoic acid = 122.12 g/mol) Be sure to pay attention to significant figures. The

186. ## math

Each side of the shaded square is 1 unit. What is the length, width, and area of the figure?

187. ## science

what happens to chromosomes during the stage stage of the cell cycle in which the nucleus divides, include prophase, metaphase, anaphase,telophase

188. ## Physical science

A sustained force of 56 moves a model airplane 16 along its runway to provide the required speed for takeoff. Find the kinetic energy at takeoff. What is the formula?

189. ## math(Trigonometry)

2cos^2 theta + 5 sin theta - 4 = 0

190. ## Literature GR11

I have to write a paper on the lost generation, and I am having trouble coming up with a good thesis statement since the subject is so broad. Any ideas?

191. ## math average!

My average is a 74 right now. My grades are 70( which counts as 60% as my grade and i have 2 more major test coming up) 94, 60 (which counts as 25% and i have about 5 more of this coming up) 90,100,83,91,71( i have about 3 more of these and they count as

192. ## chemistry

What is the relationship between mass number,atomic number and of neutron and Give examples

193. ## Social studies

Which group of native Americans used to live in the area of new York?

194. ## PHYSICS

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

195. ## Math

To get a B in physics, a student must score an average of 80 on four tests. First three scores were 68, 75 & 84. What is the lowest score the student can make on the last test and still get a B?

196. ## social studies

In the election of 1860, the _______ won the electoral votes of all the free states, except a fraction of the New Jersey votes. A. Constitutional Union Party B. Whigs C. Republicans D. Democrats

197. ## statistics

Randomly select 100 purchases from your checkbook or 100 credit card purchases that you have made in the past year. Do not mix checks and credit card purchases; pick one or the other for this study. Would you expect the cents portion of the checks to be

198. ## math

a store sells y+3 boxes of pencils. each box has 5y-7 pencils. how many pencils does the store sell?

199. ## physics

two wires A and B have Youngsmodlii in the ratio of length's is 1:2 and ratio of length's is 1:1 .Under the application of same stress the rato of elongations is ---- ans 1.)2:1

200. ## Physics

A force was applied on a mass of 2kg moving at velocity of 5m/s. If the velocity changed to 20m/s in 4s find the change in momentum and the force

201. ## math

A number is chosen at rendom from 1-50. Find the probability of selecting numbers greater than 19.

202. ## economics

If capital’s share of income is 25% and labor’s share of income is 75%, the stocks of both capital and labor increase by 50% (K/K = N/N = 0.5), and there is no technology growth, at what rate will potential output grow? Will the capital-labor

203. ## physics

The planet Jupiter is more than 300 times as massive as the Earth But it so happens that a body would scarcely weigh three times as much on the surface of Jupiter as it would on the surface of Earth. Can you think of an explanation for why this is so?

204. ## chemistry

Give the balance chemical reaction from the following decays.(a) loss of B^+ by ^15,8 O (b) loss of B^- by ^Ag (c) loss of * by ^46,62Sn

205. ## Algebra II

Simplify the expression in exponential notation. a*a*a I thought it was a^3 but that was wrong.

206. ## Math

Mrs fuller has 2 2/6 pies left over from her party.write the number of pies left over as a fraction greater than 1

207. ## Environmental Science 11th grade

What problems are associated with the long-term containment of nuclear?

208. ## Math

Simplify the expression. 9p - 2q - 3 + 10q - 4r + 12

209. ## Calculus

Find a value of the constant k such that the limit exists. x^2-k^2 lim _________ x->8 x-8 k=+/_

3. Which of the following words shares the base word of "destination"? (1 point) destroy destiny destabilize destruction Is the answer "destiny"?

211. ## Chemistry

you have 57.0 mL of a 2.00 M stock solution that must be diluted to 0.500 M. how much water should you add?

212. ## Math

(x^4-11x^3+43x^2-40x+19) ÷ (x^2-9) Long division

213. ## math

East Battle Lake in Minnesota covers an area of about 1950 acres or 8.5X10^7 square feet and its average depth is about 3.2x10^1 feet. a. Estimate the cubic feet of water in the lake. (hint: Volume=area x average depth.) b. One cubic foot of water equals

214. ## Physics

Two equipotential surfaces surround a +1.63 10-8-C point charge. How far is the 204-V surface from the 81.5-V surface? Answer in m.

215. ## science

name three types of data

216. ## math

A cold front caused the temperature to drop to 21f. The temperature after the drop was 36f. Write and solve an equation to find the temperature before the temperature dropped. my answer is 57f. my equation is 36f=21f-f

217. ## Algebra

how do you simplify kz(k+1/z)

218. ## calculus

Use the shell method to find the volume of the solid formed by rotating the region bounded by y=x^3, y=0, x=0, and x=2 about the line x=3.

219. ## physic

A canon is angled at 45º and fires a canon ball at 100 m/s. How long will it take the canon to reach it's maximum height?

220. ## Social studies

Define a cultural region

221. ## Corporate Finance

You are given the following for Cardinal & Cardinal, Inc. Their tax rate is 34%. The firm is in need of \$5 million dollars in external funds. Your bond advisor suggests that new bond issues can be lower than the current yield to maturity by 1.5% . Existing

222. ## algebra

Determine if the inverse of function {(-3, -6), (-1, 2), (1, 2), (3, 6)} is also a function. A. function B. not a function B

223. ## Science

Can you help me with meiosis? Why is meiosis important?

224. ## Math

A box with a height of 2 centimeters has a volume of 24 cubic centimeters. The length is three times longer that its width. What is the length of the box?

225. ## algebra

Find the maximum or minimum of the following quadratic function: y = x2 - x - 56. A. -56 B. 56 C. -225/4 D. 225/4 d

226. ## School For Human Rights

A student wants to prepare Halite. How much sodium can he use to completely react it with 30g of Chlorine gas?

The chickens on a farm eat 3 times as much grain as the turkeys do per week. The chickens and turkeys eat a total of 52 pounds of grain every week. How much grain do the chickens and turkeys each eat every week? Any help would be appreciated, thank you in

228. ## History

What do you think Calhoun meant by "the benefits and burdens of the Union" should be equally distributed?

229. ## Grammar

Hi means what?

230. ## Math

Mrs. Dalton wanted to purchase a new fence to put around the Danish playground . The playground has a length of 25 yards and a width of 30 yards. How much fence does she need to purchase?

231. ## geometry

using the diagram where there is

232. ## physics very hard

webassign(.)net/yf/22-30.gif The image above shows some of electric field lines due to 3 poin charges along the vertical axis. All 3 charges have the same magnitude. A. What are the signs of the 3 charges? Explain reasoning. B. At what points is the

233. ## Chemistry

you have 57.0 mL of a 2.00 M stock solution that must be diluted to 0.500 M. how much water should you add?

234. ## Computer

I have the answer I was looking for, but do not know exactly how to format it into Excel. Can you please show that format ASAP? This is due tomorrow. Thank you!!! Bank Stmt Balance \$4270.00 Add Rejected Checks 140.00 Deposited Checks 1650.00 Ending Balance

235. ## poetry

In" fire and ice" Frost compares fire to

236. ## English

What word is being modified by the prepositional phrase? The monkeys ran from the sound of humans? Is it sound?

237. ## math

I need help teaching my 2nd grader how to come up with the answer. Easy for an adult..difficult to explain to a child. I am thinking of 2 numbers who sum is 15. One of the numbers is 9 more than the other. Got the 12 plus 3 part. Help me explain it in its

238. ## Social studies

Which group of native Americans used to live in the area of new York?

240. ## algebra

f of x = the square root of 2x minus 5 Find f(7) A. 2 B. 3 C. -5 D. 7 A

241. ## Chem

How do I calculate mass in grams for something that absorbs 235J to change its temp from 13 degrees C to 55 degrees C? What is the formula?

242. ## Math

In the base-ten numeral 770, which place is the digit that repersrnts a value that is 10 times the value of the 7 in the tens place?

243. ## geometry

a playground is 50 yd by 50 yd. amy walked across the playground from one corner to the opposite corner. how far did she walk.

244. ## geometry

The square of an integer never hasa last digit equal to:a.1 b.4 c.5 d.8 e.9

245. ## History

What is the significance o the Tariff of Abominations?

246. ## language arts

what is verb or verb phrase for Boats might take weeks for the trip across the ocean

247. ## College Algebra help!!!

I have to solve each equation using a u substitution and need help understanding how to do this. The first equation is: 1. x^2/3-2x^1/3-15=0 2. x+4=7 Squareroot x+4

248. ## stoichiometry

How many liters of H2 are required to react completely with 5.7 liters of O2?

249. ## physic

A canon is angled at 45º and fires a canon ball at 100 m/s. How long will it take the canon to reach it's maximum height?

250. ## spanish

How do you say she is laying on the bed and on the phone in spanish

251. ## world civilization 1 his 103

• How has the nature and technology of warfare evolved, from earliest times to 1500 CE?

252. ## math

u deposit \$100 at the end of each quarter in a sinking fund earning 4% compounded quarterly. How many quarterly deposits must you make in order to reach your goal of saving \$10,000? Round your answer off to the nearest whole number

253. ## Calculus

find the derivatives of the given functions. g(t)=sqrt t(1+t)/t^2 the sqrt is just over t.

254. ## math

is 4w-121w^3 factorable?

255. ## physics

how much work (J) is done by friction when the mass is 150 kg and dragged for 10 m if the coefficient of sliding friction is .3?

256. ## Math

the payout for a five number bet between 0,00,1,2, and 3 is 6 to 1. Find the expectyed value of betting one dollar on the five number bet

257. ## college chemistry

How many grams would you weigh out to get 3.1 X 10-3 Moles of MgCl2?

258. ## astronomy

Assume that the mass of a sun-like star is 2.50 x 10^5 Earth masses and that its radius is about 101.0 times that of Earth. The density of Earth is about 5,500 kg/m^3. What is the density of this star?

259. ## Chemistry

you have 57.0 mL of a 2.00 M stock solution that must be diluted to 0.500 M. how much water should you add?

260. ## math

The perimeter of a rectangle is 38 centimeters. The length is 7.5 centimeters. What is the width?

261. ## chem

What does the concentration of the benzoic acid in the original liquid and the extracting liquid relate to after the extraction is completed? Answer a. The density of the original liquid. b. The density of the extracting liquid. c. The solubility of

262. ## math

If 1/2 of a number, 1/3 of the number, 1/4 of the number, and 2/7 of the number are added together, the sum is 575. What is the number? Please show steps/work.

263. ## Math

Need help with this: Graph f(x) = -√ x

264. ## Chemistry

you have 57.0 mL of a 2.00 M stock solution that must be diluted to 0.500 M. how much water should you add?

265. ## Chemistry

This is question 4a on section a.12 chemistry. What will you observe happening to the balloon as it sits in the warm car

266. ## Math

I have a 2500 gallon horizontal cylindrical tank that is 11 feet long and has a diameter of 6 feet 4 inches. How much liquid is in it when I measure 27 inches of water ?

267. ## Calculus

Use the disk method to find the volume of the solid formed by rotating the region bounded by y=2x and y=x^2 about the y-axis

268. ## math

I have a 76 average right now, what grades do I need to get if i have 5 more tests and need to get an 85 average?

16grams= mg

270. ## math

(-32)-s (-9) I am not good at algebra. I am supposed to use the distributive property, but not sure where to begin.

271. ## math

how do you do the steps for this problem find two exact values for sin(cos^-1 sqrt5/6)

272. ## math

Hello. I am having a little bit of touble with algebra, distributive property. The question is -20 (19-a) can you please help?! Thanks!

273. ## Science

Hello Steve. I have another question... why is Meiosis important?

274. ## physices

A sound wave has a wavelength of 3.0 m.

275. ## English

The towns water pipe was in the way of the new bridge

276. ## algebra

Need to know the steps to multiply and simplify the expression: (4-z)z=

277. ## math

write 3 letter that do not fit the rule.?

278. ## algebra

f of x = the square root of 2x minus 5 Find f(4.5) A. 2 B. 3 C. -5 D. 7 B

279. ## algebra

f of x = the square root of 2x minus 5 Find f (27) A. 2 B. 3 C. -5 D. 7 D not sure on this stuff, could you explain the steps?

280. ## English

An Essay of 350 words,Topic is about A mememorable moment

281. ## geography

Can you check my answers please? 1. What is the quickest way to get by ship from the Mediterranean Sea to the Indian Ocean? Travel southeast down the Suez Canal and Gulf of Suez. Then continue to travel southeast through the Red Sea to the Gulf of Aden.

282. ## math

perform the following unit conversion. 296 0z= ___________ lb 18.5, 55.5, 37, 74 My Answer is 18.5 Perform the following conversion. 32kg= ______ lb 16,320,70.4,14.4 My Answer is 70.4 Some people feel that the ideal temperature for an office space is 72.0

283. ## English

Hello. I will really appreciate your advice. 1)Do we need the article "the" in the following context: "It is important to enhance cooperation with the (?)non-members of the European Union" (no particular country is meant, just a general statement)? 2)The

284. ## Chemistry

you have 57.0 mL of a 2.00 M stock solution that must be diluted to 0.500 M. how much water should you add?

285. ## Maths

If n=5 and r=1 (1+b)=10a,determine b in terms of a

286. ## algebra

how do you solve 2w^9(5w)(4w^10)

287. ## Math

Stacy multiplied 5x9 and said the answer was 44.what two patterns could you use to show that her answer is not correct?

288. ## math

what information goes on fishbone diagram for hotel

289. ## Math

Ms. Sue could you help me with mt question I posted re interior and find exterior angle having to total 180 degrees I believe the answer would be 40 degrees

290. ## Algebra

35-2z-z^2

What is the sociological perspective on global stratification? How does this provide insight into global inequality? Thank you!

292. ## Algebra

y^4-10y^3+21y^2

293. ## Math

Stacy multiplied 5x9 and said the answer was 44.what two patterns could you use to show that her answer is not correct?

294. ## physics

A scooter with a mass of 25kg on a horizontal plane that is inclined until at an angle of 3degrees.what is the minimum coefficient of static friction for the scooter not to slide?

295. ## algebra

5r+5s-8(4r-9s)=

296. ## algebra

6 times(2-5)square=

297. ## math

how do I find the volume of a rectangular prism height 2 ft, width 5 1/2 ft length 9 3/8 ft?

298. ## science

what the area of an open end of a pipe?

a^-2a=48

45x^2+42x+9

301. ## math

what is the line segement for each length 2 1/4 and 7/8 when measured with a ruler

302. ## mathematic

set-builder notation (-1;12]

303. ## math

of the 16 million people who shops at the flea market, 2/5 of these people purchase products. how many purchas products?

304. ## mathURGENT!!!!!!

determine the smallest prime number that divides the following sum: 3^12+5^13+7^14+11^15? please answer and explain step by step how u got it!!!!

305. ## Math

3a+4b=-25 2a-3b=6

306. ## science

what plates is mount adatara on?