Questions Asked on
September 11, 2014

  1. Math-PLEASE check my answers

    What types of problems can be solved using the greatest common factor? What types of problems can be solved using the least common multiple? Complete the explanation. *** Use the words 'same' and 'different' to complete the following sentences.*** Problems

    asked by Sam
  2. chemistry

    mercury has a specific gravity of 13.6.How many mL OF mercury have a mass of 0.35kg.

    asked by marge
  3. Science!

    Which of the following is a valid reason why a scientist might reject a scientific theory? A. Some people disagree with it. B. It covers too broad a topic. C. New evidence contradicts it. D. It is too old. Is the answer C?

    asked by Gwen
  4. physics

    A student witnesses a flash of lightning and then t = 6.5 s later the student hears the associated clap of thunder. Light travels at 3.0 × 108 m/s in the air. How long, t1, in seconds did it take the light to reach the student's eyes after the flash?

    asked by joe
  5. physics

    A runner is at the starting gate and hears the starting gun. He begins running with a constant acceleration ai = 0.55 m/s2. He crosses the finish line at d = 100 m and then begins slowing down. It takes him tr to cross the finish line. It takes him ts =

    asked by joe 10
  6. physics

    A skydiver falls d1 = 495 meters in t1 = 22 s before opening his parachute. After the chute opens, he falls an additional d2 = 470 meters in t2 = 56.5 s. Write an expression that describes the skydiver's average speed, v1 during the period before opening

    asked by joe 22
  7. Physics

    At the local swimming pool, the diving board is elevated h = 7.5 m above the pool surface and overhangs the pool edge by L = 2 m. A diver runs horizontally along the diving board with a speed of v0 = 3.4 m/s and then falls into the pool. Neglect air

    asked by Lauren HELP
  8. biology

    why do potatoes and onions have reducing sugar present.

    asked by dmoses
  9. 3

    An astronomy student is studying the sun. While monitoring her equipment, she observes a solar flare. She then observes the reflection of the solar flare off of a passing satellite and with her equipment she is able to determine that the reflected light

    asked by joe
  10. 7th grade math

    A large carton of juice holds 12 cups. How many 3/4 cup servings does the carton hold? I'm not sure how to solve it at all.

    asked by Reece
  11. Physics

    A plane flies towards a ground-based radar dish. Radar locates the plane at a distance D = 41 km from the dish, at an angle θ = 52° above horizontal. What is the plane’s horizontal distance, DH in meters, from the radar dish??

    asked by Lauren HELP
  12. english

    1. The flagman tells the man it is not his job to ____ (1 point)answer questions. give directions. issue tickets. give advice. 2. _________ is the woman’s worst enemy. (1 point)Love Loneliness Fear Time

    asked by boe
  13. Statistics

    A nutritionist wants to conduct a study to validate the efficacy of an herb as an aid in weight loss. She randomly assigns half of a group of overweight persons to a treatment group who are given the herb with instructions for its use and a planned diet

    asked by Amy
  14. Statistics

    A poll was taken of a random sample of 1189 college students. Of these students, 789 reported that they had a drinking binge (more than 10 drinks in an evening) in the past month. Select the most believable conclusion. A. About 66.358% of college students

    asked by Amy
  15. physics

    A student witnesses a flash of lightning and then t = 6.5 s later the student hears the associated clap of thunder. Sound travels at 343 m/s in the air. What distance from the student is the lightning strike, in meters?

    asked by joe 10
  16. Physics

    1. An 80.0-kg astronaut is floating at rest a distance of 10.0 m from a spaceship when she runs out of oxygen and fuel to power her back to the spaceship. She removes her oxygen tank (3.0 kg) and flings it into space away from the ship with a speed of 15

    asked by Ryzza
  17. rela

    how does the interloper by saki creates an effect of surprise?

    asked by reina
  18. statistics

    In this question, use Excel functions rather than Normal distribution tables. The number of new cars sold by "Ma's New Car Factory" in a financial year can be approximated by a normal distribution with a mean of 125,000 cars and a standard deviation of

    asked by Sylvia
  19. Math

    Katie cut out a piece of wrapping paper that was 2 times as long and 3 times as wide as the box that she was wrapping.The box was 5 inches long and 4 inches wide.What is the perimeter of the wrapping paper that Katie cut?

    asked by Amy NGO
  20. Quantitative Reasoning (math)

    Your weight on the moon is relative to your weight on Earth. Neil Armstrong weighed 360 lbs. in his moon gear while on Earth, but on the moon he only weighed 60 lbs. What is the ratio of the Earth weight to the moon weight? How much would you weigh

    asked by Heather
  21. Algebra 1

    the temperature at noon in los angeles on a summer day was 88 degrees fahrenheit. during the day, the temperature varies from this by as much as 7.5 degrees fahrenheit. write and solve an absolute-value inequality to find the range of possible temperature

    asked by Katie
  22. math

    writing to explain explain how to subtract 7.6 from 20.39

    asked by LAKSHMI
  23. 1

    A student witnesses a flash of lightning and then t = 6.5 s later the student hears the associated clap of thunder. Sound travels at 343 m/s in the air. What distance from the student is the lightning strike, in meters?

    asked by joe
  24. 2

    A student witnesses a flash of lightning and then t = 6.5 s later the student hears the associated clap of thunder. Light travels at 3.0 × 108 m/s in the air. How long, t1, in seconds did it take the light to reach the student's eyes after the flash?

    asked by joe
  25. math

    you research the cost of a gallon of gasoline over several years to look for trends the table shows the data you have collected what is the equation of the line of best fit how much would you expect to pay for gasoline in 2029 a)y=0.538x+1.36; $33.10 b)

    asked by hay'ikam
  26. science

    Suppose that a biologist states that the average height of undergraduate students at your university is 205 cm plus or minus a standard deviation of 17 cm. What does this mean? Does it mean that the height of undergraduates at the university ranges from 17

    asked by Kimmie
  27. Physical science

    1. Nicotine,a poisonous compound found in tobacco leaves,is 74% carbon,8,65% hydrogen and 17,35% nitrogen (a)calculate the empirical formula of nicotine (b)what is the molecular formula of nicotine if it has a molar mass of 165 g.mol^-1

    asked by Please help please
  28. Science

    Identify the dependent and independent variables in the following experiments. 1. Height of bean plants is recorded daily for 2 weeks. 2. Percent absorption by a pigment is measured for red, blue, green, and yellow wavelengths of light. My thought process:

    asked by Clare
  29. statistics

    A researcher hypothesizes that individuals who listen to classical music will score differently from the general population on a test of spatial ability. On a standardized test of spatial ability, (u = 58). A random sample of 14 individuals who listen to

    asked by adrienne
  30. Statistics

    One month before a recall election, a poll of 500 Wisconsin voters showed that 46% planned to vote for the Democratic challenger Tom Barrett and 45% planned to vote for Republican Governor Scott Walker. Undecided voters constituted another 9%. The margin

    asked by Amy
  31. 8th grade math

    Maggie claims that to make the measure of an angle greater, you just extend the rays. How do you respond?

    asked by Enis
  32. Physics

    A kayaker needs to paddle north across a 85 m wide harbor. The tide is going out, creating a tidal current that flows to the east at 1.6 m/s. The kayaker can paddle with a speed of 2.8 m/s. (a) In which direction should he paddle in order to travel

    asked by Mike
  33. Music

    if you add up the durations from left to right on any level of a note tree you end up with a what?

    asked by Paula
  34. 2

    Assume that an intercontinental ballistic missile goes from rest to a suborbital speed of 6.50 km/s in 60.0 s (the actual speed and time are classified). What is its average acceleration in m/s2 and in multiples of g (9.80 m/s2)?

    asked by joe
  35. chemistry

    solution of 0.1molar NH4OH and 0.1 NH4CL ph=9.25 calculate kb for NH4OH?

    asked by ankit
  36. 6

    A student begins at rest and then walks north with an average speed of v1 = 0.85 m/s. The student then turns south and walks with an average speed v2 = 0.45 m/s. (a) What was the student's overall average velocity vavg, x, in m/s, for the trip assuming the

    asked by joe
  37. Calculus II

    find the distance between the given parallel planes 5x-5y+z=10 and 10x-10y+2z=2. I got 9sqrt51/51

    asked by Mitch
  38. math

    order the numbers from least to greatest. _ 1 4/5, 1.78, 1 5/6, 7/4, 1.7, 1 8/11 I am confused on going back and forth between decimals and fractions.

    asked by randy
  39. physics

    A runner is at the starting gate and hears the starting gun. He begins running with a constant acceleration ai = 0.55 m/s2. He crosses the finish line at d = 100 m and then begins slowing down. It takes him tr to cross the finish line. It takes him ts =

    asked by joe 10
  40. math

    A gaint wheel in a fair had a diameter of 250 feet.what's the distance a person travels in one complete revolution?

    asked by twisha
  41. math

    write two ratios that are equivalent to 1:1

    asked by sara
  42. chemistry

    which of the following is true regarding the transition elements? A. Multiple oxidation states resulting from the involvement of d electrons in bonding is a characteristic of transition elements. B. Most transition elements have lower melting and boiling

    asked by Emiko
  43. math

    Write in an integer that represents your height on the teeter totter that is relative to the balance point height: you are 8 inches below the balance point height or you are 15 inches the balance point height---your height is the opposite or your friend is

    asked by Anonymous
  44. 10

    A runner is at the starting gate and hears the starting gun. He begins running with a constant acceleration ai = 0.55 m/s2. He crosses the finish line at d = 100 m and then begins slowing down. It takes him tr to cross the finish line. It takes him ts =

    asked by joe
  45. chemistry :)

    Write the formula for the polyatomic ion in NaNO 3. Write the formula for the polyatomic ion in Ag2CO3. Write the formula for the polyatomic ion in NaHCO3. Write the formula for the polyatomic ion in BaSO4

    asked by M
  46. physics

    Sound travels at 343 m/s in the air. What distance from the student is the lightning strike, in meters? Write an expression that describes the skydiver's average speed, v1 during the period before opening the chute in terms of the given quantities.

    asked by joe 22
  47. geometry

    One endpoint and the midpoint of a segment are given. Find the coordinates of the other endpoint. Show all your work. A. Endpoint: (-1,9) Midpoint: (-9,-10) Endpoint: _______ B. Endpoint: (9,-10) Midpoint: (4,8) Endpoint: ________

    asked by marissa
  48. CHEMISTRY

    Determine the solvent and solute in the following : a) carat 14 gold b) gaseous drinking ( pepsi for ex.)

    asked by MAD
  49. MATH

    A HUMMINGBIRD BEATS IT WINGS 53X SEC HOW MANY TIMES DOES THE HUMMINGBIRD BEATS IN 5 SEC

    asked by VERONICA
  50. math

    A motorboat left a harbor and traveled to an island at an average rate of 11 knots. The average speed on the return trip was 10 knots. If the total trip took 4.2 hours, how far is the harbor from the island?

    asked by Alana
  51. Chemistry please help

    104 ml of ethene, C2H4 is burned in 408 ml of oxygen, producing carbon dioxide and some liquid water. Some oxygen remain unreacted. Calculate the volume of carbon dioxide produced and the volume of oxygen remaining

    asked by Anonymous
  52. 5th grade math

    A small company packs 12 jars of jlly into each of 110 boxes to bring to the farmers market. how many jars of jelly does the company pack in all

    asked by Mythreyee
  53. 7th grade math

    Carrie has a 10ft long plank of wood. She want's to cut three pieces that are each 2 2/3 feet long from the plank. how long will the plank be after she cuts off the three pieces?

    asked by Reece
  54. 8th grade math

    Henry claims that a line segment has a finite number of points because it has two endpoints. How do you respond?

    asked by Enis
  55. Math

    CAN SOMEONE CHECK MY ANSWERS PLEASE? What types of problems can be solved using the greatest common factor? What types of problems can be solved using the least common multiple? Complete the explanation. *** Use the words 'same' and 'different' to complete

    asked by Sam
  56. Physics

    Heather and Jerry are standing on a bridge 43m above a river. Heather throws a rock straight down with a speed of 12m/s . Jerry, at exactly the same instant of time, throws a rock straight up with the same speed. Ignore air resistance.

    asked by Dan
  57. physics

    A bullet is fired through a wooden board with a thickness of 8.0 cm. The bullet hits the board perpendicular to it, and with a speed of +350 m/s. The bullet then emerges on the other side of the board with a speed of +210 m/s. Assuming constant

    asked by scott
  58. 8th Grade math

    a student says there can only be 360 different rays emanating from a point since there are only 360 degrees in a circle. Is this true? Why or Why not?

    asked by Enis
  59. statistics

    Henry performed a two- tailed test for an experiment in which N = 24. He could not find his table of t critical values, but he remembered the tcv at df = 13. He decided to compare his tobt with this tcv. Is he more likely to make a Type I or a Type II

    asked by adrienne
  60. 10

    A runner is at the starting gate and hears the starting gun. He begins running with a constant acceleration ai = 0.55 m/s2. He crosses the finish line at d = 100 m and then begins slowing down. It takes him tr to cross the finish line. It takes him ts =

    asked by joe
  61. Integers

    Billy buys 3 doze light bulbs. After changing the lightbulbs in the house, he has 15 light bulbs left. How many lightbulbs did he use? Multiply and Divide Interger problem. Please show me steps how to solve?

    asked by Cass
  62. Math, Physics

    A soccer ball is kicked from the ground at an angle of è = 46 degrees with respect to the horizontal. The hang time of the ball is tm = 1.9 s. What is the total horizontal distance traveled by the ball in meters?

    asked by Brad
  63. Music

    What is the vertical line at the end of a measure called?

    asked by Paula
  64. math

    Running at an average rate of 4 meters per second, a sprinter ran to the end of a track. The sprinter then jogged back to the starting point at an average rate of 2 meters per second. The total time for the sprint and the jog back was 2 minutes 6 seconds.

    asked by Tish
  65. Science - Please Check My Answers

    Please help me with the following: Which is usually the best way to present or communicate inferred data? A. in a bar graph B. in a data table C. in a simple diagram D. in a written paragraph I know the answer isn't C or D(I got C wrong), but now I think

    asked by Brady
  66. Statistics

    The father of a junior high school student wants to determine the most popular book among junior high students. Select the sample with the least potential bias. A. A randomly selected group of 10 book sellers B. A randomly selected group of 30 junior high

    asked by Amy
  67. physics

    a diver dives from the top of a 100m cliff. he begins his dive by jumping up with a velocity of 5m/s how long does it takes for him to hit the water below?

    asked by roberta
  68. CHEMISTRY

    Classify these mixtures to homogeneous and heterogeneous a) orange juice b) tap water ( home water )

    asked by MAD
  69. Physics

    A military jet is flying with uniform motion at 9.3*10^2 m/s[S], the magnitude of which is approximately Mach 2.7. At time zero, it passes a mountain top, which is used as the reference point for this question. a)Construct a table showing the plane's

    asked by Anonymous
  70. Biochemistry

    Calculate how you would make 0.5L of a 0.5M (500mM) acetate buffer at a pH of 4.7. Available is sodium acetate and glacial acetic acid. pH=4.7 pKa of acetic acid=4.76 Not sure if I did this next part right: 4.7=4.76 + log [base]/[acid] -0.06= log

    asked by Nicole
  71. physics

    In a certain particle, a current of 0.50 mA is carried by a 5.0MeV proton beam that has a radius of 1.5 mm. Find the density of protons in the beam.if the beam hits a target, how many protons hit the target in 1.0s.

    asked by grace
  72. chem

    If 309 J of heat are removed from 10.0 g of ice (specific heat = 2.06 J/g ºC) at -5.5 ºC, what is the final temperature of the ice sample?

    asked by S
  73. Social Studies

    The government must provide some goods and services because? A. they are too expensive for entrepreneurs to provide. B. demand for them is greater then supply. C. private producers have no incentive to do so. D. not many people are interested in buying

    asked by chris
  74. Physics

    A ball is thrown horizontally from the top of a 65 m building and lands 105 m from the base of the building. Ignore air resistance, and use a coordinate system whose origin is at the top of the building, with positive y upwards and positive x in the

    asked by Lauren HELP
  75. Physics

    Consider a map oriented so that the x-axis runs east-west (with east being the "positive" direction) and y runs north-south (with north "positive"). A person drives 23 km to the north, turns and drives 76 km to the east, and then turns north and drives for

    asked by Pat
  76. 3

    t= 5.79 (a) There are approximately 1609 meters per mile. If the sun is 93 million miles away, how far is the sun in kilometers to two significant figures.

    asked by joe
  77. Physics

    A soccer ball is kicked from the ground at an angle of θ = 41 degrees with respect to the horizontal. The hang time of the ball is tm = 0.9 s. What is the horizontal distance in meters??????

    asked by Lauren HELP
  78. Physics

    Consider a map oriented so that the x axis runs east–west (with east being the "positive" direction) and y runs north–south (with north "positive"). A person drives 14 km to the west, then turns and drives 44 km to the south. Find the magnitude and the

    asked by Pat
  79. english

    are the following word common nouns book, paper, author, Hemingway, manuscript

    asked by suzette
  80. Ecology

    8.Which of the following examples of an ecological study involves the ecosystem level of organization? A.The effects of human activities on biogeochemical cycling B.The effects of an invasive plant species on bird nesting sites C.The effects of competition

    asked by Anonymous
  81. physics

    When the Sun is directly overhead, a hawk dives toward the ground with a constant velocity of 4.80 m/s at 50.5° below the horizontal. Calculate the speed of her shadow on the level ground. What i have done: x= rcos(theta) x=4.80m/s*cos(309.5) x=3.05m

    asked by Gaby
  82. math

    A jeweler wants to make a silver alloy to be used to make necklaces. How many ounces of a silver alloy that costs $3.50 per ounce should be mixed with one that costs $7.00 per ounce to make a new 30-ounce alloy that costs $6.30 per ounce?

    asked by Barbara
  83. Science

    What is the first step in the scientific method? (I WAS ABSENT DURING LESSON) A- Observation B- Hypothesis C- Conclusion D- Test

    asked by Servanshia
  84. Biology

    What is a reactant that binds to a catalyst? Answer: a catalyst An enzyme is a kind of ? Answer: a substrate

    asked by Please help
  85. Math

    a number and its absolute value are equal. if you subtract 2 from the number, the new number and its absolute value are not equal. what do you know about the number? what is a possible number that satisfies these conditions?

    asked by Brandon
  86. college chemistry

    Express the concentration of a 0.0620M aqueous solution of fluoride, F-, in mass percentage and in parts per million. assume the density of the solution is 1.00g/mL.

    asked by Linda
  87. math help

    emaily says that she can convert 18/25 to a decimal by using equivalent fractions instead of dividing 18 by 25. Use emily's method to convert 18/25 to a decimal. I am confused because there is not just 1 number equivalent to both 18 & 25. There are 2

    asked by reece
  88. Math

    consider the polynomial (x-a)(x-b)and the real number line Identify the points on the line where the polynomial is zero. In each of the three subintervals of the line, write the sign of each factor and the sign of the product.For which values does the

    asked by Brian
  89. Geography

    Think of compass rose as a clock with north at 12 o'clock. what would the direction and bearing of the hour hand be at a) 3 o'clock b) 6 o'clock c) 9 o'clock d) 10:30 Please help. Thanks

    asked by Epic
  90. physics

    A truck driver slams on the brakes and the momentum of the truck changes from ‹ 53000, 0, 0 › kg · m/s to ‹ 27000, 0, 0 › kg · m/s in 3.3 seconds due to a constant force of the road on the wheels of car. As a vector, write the net force exerted

    asked by ed
  91. math

    A new machine that deposits cement for a road requires 13 hours to complete a one-half mile section of road. An older machine requires 15 hours to pave the same amount of road. After depositing cement for 2 hours, the new machine develops a mechanical

    asked by Barbara
  92. physics

    the peregrine falcon is the world's fastest known bird and has been clocked driving downward toward its pray at a constant vertical velocity of 97.2 meters per second. If the falcon drives straight down from a height of 100 meters, how much time does this

    asked by baylie
  93. Physics Help

    Freshly picked cucumbers are dropped into a bin from a height of 1.25 m above the bottom of the bin. Assuming that the bin is empty, how fast is a cucumber going when it hits the bottom of the bin? How much time does it take the cucumber to fall to the

    asked by Kayla
  94. physics

    A speedy tortoise can run at 0.12 m/s, and a hare can run 18 times as fast. In a race, they start at the same time, but the hare stops to rest for 1.5 min, so the tortoise wins by a shell (20 cm). How long does the race take? Answer in units of s

    asked by karen
  95. physics

    A commuter backs her car out of her garage with an acceleration of 1.40 m/s2. (a) How long does it take her to reach a speed of 2.00 m/s? (b) If she then brakes to a stop in 0.800 s, what is her deceleration?

    asked by joe
  96. Atmospheric Science

    1. What solar temp is needed for the peak intensity of radiation to occue at .2 micrometers? Remembering that humans can see light only between .4 and .7 microns, would the sun look brighter or dimmer at this new temp? 2. How much variation in earth

    asked by Rebekah
  97. physics

    The vertical acceleration of a projectile A)equals g pointing sometimes upwards and other times downwards. B)equals g pointing upwards C)is zero. D)equals g pointing downwards E)continuously increases. Thanks!

    asked by Jean
  98. Physics

    When Babe Ruth hit a homer over the 10m -high right-field fence 110m from home plate, roughly what was the minimum speed of the ball when it left the bat? Assume the ball was hit 1.0m above the ground and its path initially made a 32∘ angle with the

    asked by Misty
  99. math

    gary is 61 1/8" tall. His friends gino and gilbert are 56 1/2" tall and 63 1/8" tall. what is the average height of the three friends. Do i divide my answer by 3?

    asked by reid
  100. Physics 1

    A golf ball is struck with a five iron on level ground. It lands 92.0m away 4.20s later. What was (a) the direction and (b) the magnitude of the initial velocity? I have no idea how to go about using the information given to find the first part (A). Even

    asked by Molly
  101. science

    Which of the following is a good study habbit.

    asked by Anonymous
  102. mathematics

    Write the following into sum or difference. Log (axb)

    asked by m ahmad
  103. Physics

    A car traveling 91km/h strikes a tree. The front end of the car compresses and the driver comes to rest after traveling 0.93m . What was the magnitude of the average acceleration of the driver during the collision? Express the answer in terms of "g's,"

    asked by Anonymous
  104. CHEMISTRY

    What is difference between equivalence point and end point in the titration ?

    asked by MAD
  105. Physics Help

    1) two cars start at the same location and accelerate for the same amount of time. if one car has twice the acceleration of the other, how will the final speeds of the cars compare? by how much farther will the faster car outdistance the slower car?

    asked by Kayla
  106. physics

    A hockey puck truck at ice level just clears the top of a glass wall that is 2.80 m high. The flight time to this point is 0.650 s, and the horizontal distance is 12.0 m. Find a.) the initial speed of the puck and b.) the maximum height it will reach.

    asked by Anonymous
  107. History

    I am home schooled and I am suppose to ask people their ideas on how to solve the Social Security problem. It says in my book the population of working Americans is not growing quickly enough to fund continued increases in Social Security spending. At some

    asked by Meghan
  108. Social Studies

    Great early American civilizations built large cities A. in Central and South America. B. In Alaska C. on the plains of North America D. in Asia Is the answer A?

    asked by Gwen
  109. Physics 1

    You are to drive to an interview. The interview is at 11:15 a.m. You plan to drive at , so you leave at 8:00 a.m. to allow some extra time. You drive at that speed for the first , but then construction work forces you to slow to for . What would be the

    asked by Alex
  110. Physics Help!

    The Fly wheel has a small magnet of mass M mounted on it. Each time the magnet passes the coil, a voltage pulse is generated , which is passes to the c.r.o the display of the c.r.o is 10 cm wide . The flywheel is rotating at a rate of about 3000

    asked by Ariana
  111. Physics Help

    Divers for many years have dived into the ocean from the cliffs of Acapulco, a distance of 35 m above the water. How fast are the divers moving when they hit the water? If the divers travel a distance of 5 m through the water before momentarily coming to

    asked by Kayla
  112. math

    solving equation 7√(x/1-x) + 8√(1-x/x) = 15 following roots are obtained

    asked by Nithin
  113. phusics

    We did not find any results for 'a ball is projected vertically up with an initial speed of 20m/sec and acceleration due to gravity is 10m/s^2then how long will it take for the ball to reach a point 10m above the point of projection second line'

    asked by dipu
  114. maths b

    use the z score table to find the floolwing: a) p(1.2

    asked by jay
  115. math

    An investment adviser invested $14,000 in two accounts. One investment earned 4% annual simple interest, and the other investment earned 2.5% annual simple interest. The amount of interest earned for 1 year was $458. How much was invested in each account?

    asked by Barbara
  116. Physics

    A light bulb is placed 21.7 cm in front of a concave mirror. When the concave mirror is replaced by a plane mirror in the same location, the bulb's image moves 4.60 cm closer to the mirror. Calculate the focal length of the concave mirror.

    asked by Nick
  117. college math

    How many liters of water should be evaporated from 110 liters of a 12% saline solution so that the solution that remains is a 20% saline solution

    asked by Anonymous
  118. Physics

    A ball is dropped from a roof of a building and strikes the ground in 3 seconds. If a second ball is thrown horizontally from the roof, it will hit the ground in:

    asked by Josh
  119. math

    A cement block accidentally falls from rest from the ledge of a 51.6 -m-high building. When the block is 15.7 m above the ground, a man, 1.90 m tall, looks up and notices that the block is directly above him. How much time, at most, does the man have to

    asked by mikaa johburg
  120. maths a

    Charlotte received a score of 68 on both her English and Maths tests. The mean for English was 52 and the mean for Maths was 55. The standard deviations for English and Maths were 10 and 8 respectively. In which subject did Charlotte perform better?

    asked by jay
  121. Business

    An example of a non-renewable resource would be... a. solar energy b. gold c. agricultural products d. a lbrary book Please someone help me with this problem as soon as possible!!!

    asked by Jaelin
  122. rela

    the interloper by saki creates an effect of surprise, how? can one of them be situational irony? what other ones?

    asked by reina
  123. math

    A plane leaves Chicago headed for Los Angeles at 520 mph. One hour later, a second plane leaves Los Angeles headed for Chicago at 620 mph. If the air route from Chicago to Los Angeles is 1800 miles, how long will it take (after the first plane takes off)

    asked by Barbara
  124. Math

    i am a 4 digit odd number none of the numbers are 0-9 the tens digit is twice the ones digit the hundreds digit is twice the tens digit and the thousands digit is one less than the hundreds digit

    asked by Erin webb
  125. Chemistry

    If there are 0.625 g of NaCl left in a beaker that originally contained 75.0 mL of saltwater, what must have been the molar concentration of the original solution? The molar mass of NaCl is 58.44 g/mol.

    asked by Summer
  126. physics

    Assume that an intercontinental ballistic missile goes from rest to a suborbital speed of 6.50 km/s in 60.0 s (the actual speed and time are classified). What is its average acceleration in m/s2 and in multiples of g (9.80 m/s2 )?

    asked by joe
  127. Social Studies

    The Dutch, English, and french explorers of the 1500s and 1600s were seeking A. A direct water route to asia*** B. English speaking Native Americans. C. The gold of the Aztec Empire D. Corn, tobacco, and squash Is the answer a?

    asked by Beau
  128. statistics

    Let E and F be two events for which the probability of atleast one of them occurs is 3/4. what is the probability that neither E nor F will occur.

    asked by jasmine
  129. math

    A plane leaves Chicago headed for Los Angeles at 520 mph. One hour later, a second plane leaves Los Angeles headed for Chicago at 620 mph. If the air route from Chicago to Los Angeles is 1800 miles, how long will it take (after the first plane takes off)

    asked by Tish
  130. Physics Help Please

    1) two cars start at the same location and accelerate for the same amount of time. if one car has twice the acceleration of the other, how will the final speeds of the cars compare? by how much farther will the faster car outdistance the slower car?

    asked by Kayla
  131. physics

    A cement block accidentally falls from rest from the ledge of a 51.6 -m-high building. When the block is 15.7 m above the ground, a man, 1.90 m tall, looks up and notices that the block is directly above him. How much time, at most, does the man have to

    asked by kingsley danon
  132. math

    he number of block has 9 in the ones place. the number in the hundreds place is one more than the number in the tens place, those two numbers equal 11. how many blocks are there?

    asked by n/a
  133. physical science

    a bowling ball loses .5kg x m/s momentum as it hits bowling pins. how much momentum do the pins gain? please help

    asked by cassidy
  134. chemistry

    Calculate the ÄHvap , in kJ/mol, for ethanol, given that the vapor pressure at 45.0°C is 155.0 torr. The normal boiling point of ethanol is 78°C. Express your answer to two decimal places.

    asked by Anonymous
  135. Math

    consider the polynomial (x-a)(x-b) and the real number line In each of the three subintervals of the line, write the sign of each factor and the sign of the product.For which values does the polynomial possibly change signs?

    asked by Igor
  136. business

    Identify the components that comprise the financial statements and briefly describe the purpose of each one

    asked by gozokhp
  137. physics

    How far is the rocket from the launch pad 8.50s later when the rocket engine runs out of fuel?

    asked by Anonymous
  138. college math

    A motorboat left a harbor and traveled to an island at an average rate of 11 knots. The average speed on the return trip was 10 knots. If the total trip took 4.2 hours, how far is the harbor from the island?

    asked by Anonymous
  139. Chemistry

    A frozen dinner contains 1.5 g of fat, 14 g of carbohydrates, and 11 g of protein. How much energy is contained in this meal? Food energy Carbohydrate 4kcal/g Fat 9kcal/g protein 4kcal/g

    asked by Izzy
  140. English

    1. Everybody knows this book. 2. This book is known to everybody. 3. This book is known by everybody. (Which one is the passive voice of Sentence 1?) 4. Everybody knows Sam. 5. Sam is known to everybody. 6. Sam is known by everybody. (Which one is the

    asked by rfvv
  141. physics

    4 same conductor balls with charge q = 40 ìC and mass m = 30g mare located at the corners of a square a = 30cm. Now let the charged ball move freely from the initial position. What the final speed the ball can reach?

    asked by ali
  142. physics

    2 point charges are located at the coordinates in the figure, how much work needs to move a point charge q = ]20ƒÊC from B to A? link to photo dropbox/s/x93u73xu2zslfqj/Untitled.png?dl=0

    asked by ali
  143. math

    Running at an average rate of 4 meters per second, a sprinter ran to the end of a track. The sprinter then jogged back to the starting point at an average rate of 2 meters per second. The total time for the sprint and the jog back was 2 minutes 6 seconds.

    asked by Barbara
  144. CHEMISTRY

    What indicator is better in the following titrations : 1) strong acid/strong base a) methyl red (4.4 - 6.2 ) b) bromophenol blue (6.2 - 7.6 ) 2) strong acid/weak base a) methyl orange (3.1 - 4.4 ) b) bromophenol blue (3.0 - 4.6 ) 3) weak acid/strong a)

    asked by MAD
  145. Business

    Which statement about Sarbanes-Oxley Act is true?

    asked by Rebecca
  146. math

    1. A grayhound's maximum speed is 39.35 mph how long does it take to run a quarter mile? 2. A human's maximum speed is 27.89 mph how long does it take to run a quarter mile? 3. A giant tortoise's maximum speed is 0.17 mph how long does it take to run a

    asked by megan
  147. biology

    why do potatoes and onions have reducing sugar present

    asked by dmoses
  148. Geometry

    M is the midpoint of LM LM=3x+5 LN=5x+40 Find MN I've tried to work this out several times and am pretty sure I start it off by 3x+5=5(x)+40 but I keep getting a negative answer or a fraction for X and know that is not right. Can someone please help me?

    asked by Tiffany
  149. algebra

    Find the price of any container of lemonade at a local grocery store. (You can also find prices in advertisements and on the Internet.) Make sure you write down the number of fluid ounces in the container. Determine the unit price and post the information.

    asked by may
  150. Chemistry

    If 155 J of energy is added to 18.5 g of silver, how much will the temperature rise? Silver Specific Heat= (0.235J/g deg C)

    asked by Izzy
  151. Chemistry - dilutions

    The concentration of stain in the bottle was 5% and you added 100 microliters of it to 9.9ml of a buffer to make a working dilution of stain. You then combined 10 microliters of that diluted stain with 40 microliters of your diluted cells and put a few

    asked by Chris
  152. math

    solve v=1/3TTr2h; h

    asked by nate
  153. physics

    A hockey puck truck at ice level just clears the top of a glass wall that is 2.80 m high. The flight time to this point is 0.650 s, and the horizontal distance is 12.0 m. Find a.) the initial speed of the puck and b.) the maximum height it will reach.

    asked by Anonymous
  154. math

    How long to the nearest year, will it take an investment at a rate of 12.7% to double its value if the interest is compounded every 6 months? I keep getting 568 years, I know this is not right. Could you please show me how to do this, do I take the log of

    asked by Student
  155. math

    An investment adviser invested $14,000 in two accounts. One investment earned 4% annual simple interest, and the other investment earned 2.5% annual simple interest. The amount of interest earned for 1 year was $458. How much was invested in each account

    asked by Tish
  156. math

    A motorboat left a harbor and traveled to an island at an average rate of 11 knots. The average speed on the return trip was 10 knots. If the total trip took 4.2 hours, how far is the harbor from the island?

    asked by Tish
  157. math

    The total cost of 6 pens and 8 rubber is Rs.38. If a pen costs Rs. 4 more than a rubber, find the price of each item.

    asked by Aryan ale
  158. Chemistry

    Complete each calculation. Express your answer to the correct number of significant digits. a)4.02mL + 3.76mL +0.95mL b)(2.7 x 10^2m) x (4.23 x 10^2m) c)5092kg divided by 23L d) 2-6.3 + 6-7 e)(6.853 x 10^3L) + (5.40 x 10^3mL) f)(572.3g + 794.1g) divided

    asked by Julie
  159. Intro-Physics

    Using a Doppler ultrasound, the velocity of blood flow in a vein or an artery can be measured. In a particular patient, the flow in a particular artery is found to be 30 cm/s at one point, and 20 cm/s at a point farther from the heart. If the two points in

    asked by Ilayda
  160. Math: pre calculus

    a barn is 150 feet long and 75 feet wide. the owner has 240 ft of fencing and wants to construct two adjacent outdoor pens of identical size along the long side of the barn using the barn as one side of each pen. the owner wants the pens as large as

    asked by crisly
  161. Social Studies

    how would voters most likely react if political leaders raised taxes by 50% ? A. they would not make any changes in their behavior. B. They would demand more public goods and services. C. They would stop voting in elections. D. They would not re-elect the

    asked by chris w
  162. algebra

    A motorboat left a harbor and traveled to an island at an average rate of 11 knots. The average speed on the return trip was 10 knots. If the total trip took 4.2 hours, how far is the harbor from the island

    asked by marc
  163. Physics

    How long is Mayra, a ballerina, in the air when she leaps straight up with a speed of 1.23 m/s?

    asked by Danny
  164. statistics

    What is the mathematical relationship between the confidence level and the level of significance, α? Can you explain this to me in an easy to understand way? Thank you

    asked by MissPatte
  165. math

    The length of a rectangle is 3 feet less than twice the width of the rectangle. If the perimeter of the rectangle is 144 feet, find the width and the length

    asked by Anonymous
  166. Algebra

    If 6 is a root of the equation x^2-8x+k=0, find the value of k.

    asked by Melinda
  167. English

    1) is real-life one word? My teacher considered it to be. 2) then would Spanish-Americans be one word?

    asked by Anonymous
  168. Strayer

    An oil-drilling company knows that it costs $25,000 to sink a test well. If oil is hit, the income for the drilling company will be $445,000. If only natural gas is hit, the income will be $165,000. If nothing is hit, there will be no income. If the

    asked by Quencie
  169. Math (2nd time posting this)!

    the best order-of-magnitude estimate for 0.00006? - 10^-3 - 10^-4 - 10^-5 * my answer - 10^-6 the best order-of-magnitude estimate for 789,000? - 10^7 - 10^6 - 10^5 - 10^4 *my answer I don't understand this quite well but I want to make sure my answers are

    asked by Anonymous
  170. Accounting

    On March 1, 2013, the company lent a supplier $23,000 and a note was signed requiring principal and interest at 9% to be paid on February 28, 2014. If the journal entries are intrest recievable intrest revenue how much should I allocate to each section?

    asked by Anonymous
  171. algebra

    Alicia finished the race 3.75 seconds befor Kaye. Donna finished the race5.09 seconds after Carmen. Carmen finished the race 10 second before Kaye. Anders finished 4.89 seconds after Kaye. How many seconds earlier did Carmen finish than Anders?

    asked by Jeremy
  172. Chemistry

    the current U.S. penny is only 2.5% copper the remaining portion is zinc. Given the density of copper as 8.94 g/cm and the density of zinc is 6.57 g/cm, calculate the density of a penny.

    asked by Devante
  173. English

    1. Each student is carrying a lunch box. 2. Each student is carrying lunch boxes to the nursing home. (Does #1 mean as follows? Each student has a lunch box. #2 is different, right? In #2, each student is moving lunch boxes to the nursing home, right? I

    asked by rfvv
  174. Acoustic

    Consider a room that is 6m long, 5m wide and 3m high and whose walls, floor and ceiling have the same sound absorption coefficient (α=0.01). When all machines are in use, the sound pressure level (SPL) within the room amounts to 90 dB. A carpet is to be

    asked by qwerty
  175. Year 10 Algebra

    A farmer is building a rectangular garden bed next to a river and has 8 metres worth of fence line to fence it off. I understand that the equation of this would be: A = w(8 - 2w) However, I am unsure what to do next

    asked by Stacy
  176. Physics

    A spider crawling across a table leaps onto a magazine blocking its path. The initial velocity of the spider is 0.880 m/s at an angle of 34.1° above the table, and it lands on the magazine 0.0790 s after leaving the table. Ignore air resistance. How thick

    asked by Marisa
  177. Social Studies

    Spanish explorers first arrived in the Americas A. In the ninetenth century B. In the late 1400s C. In the late 1500s*** D. In the seventeenth century Is the answer C?

    asked by Beau
  178. math

    How many liters of water should be evaporated from 110 liters of a 12% saline solution so that the solution that remains is a 20% saline solution?

    asked by Alana
  179. English

    I need help with diagramming sentences. How do you diagram "Bruno and Shmuel talk and share food"? Is it a compound sentence, or does it have two verbs in a single clause?

    asked by Kate
  180. Math

    Write a TRUE equation and explain why it is true. Ex.) 4+3=7

    asked by Kim
  181. MATH

    How many liters of water should be evaporated from 110 liters of a 12% saline solution so that the solution that remains is a 20% saline solution

    asked by marc
  182. business

    Describe the components of the accounting conceptual framework?

    asked by gozokhp
  183. Math

    (8 divided by 7 + 5 )+ 2 squared x 8

    asked by Kamryn
  184. Physics - please check my answer

    A man tosses a ball upward. It reaches its highest point after 25 seconds. Find its initial velocity. Alright, so I tried solving this. I used the equations (let v = initial velocity): h = v^2 / 2g , and h = (v*t) - (1/2)(g)(t^2) and I got 101.48 m/s. Is

    asked by Rin
  185. math check PLEASE

    which fraction si greater than -7/5? a.-5/9 b.-6/11 c.-1/2 d.-4/9 i think its A

    asked by matt
  186. Physics Help

    On the Acme W&W company production line, parts have to be transported 100 m by conveyor belt to a machine area. The parts move at a constant speed of 2.5 m/s. How much time does it take to move a part 100 m? Show steps please! Thank you!

    asked by Tim
  187. math

    A cement block accidentally falls from rest from the ledge of a 51.6 -m-high building. When the block is 15.7 m above the ground, a man, 1.90 m tall, looks up and notices that the block is directly above him. How much time, at most, does the man have to

    asked by kingsley danon
  188. Physics Help

    a) On the Acme W&W company production line, parts have to be transported 100 m by conveyor belt to a machine area. The parts move at a constant speed of 2.5 m/s. How much time does it take to move a part 100 m? On the same conveyor belt as described in

    asked by Tim
  189. Physics

    At bat a baseball player hits a ball at a height of .889 m. The ball leaves the bat at 51 m/s at an angle of 81 degrees from the vertical. The ball skims the top of a 2.74 m wall as it leaves the field. a.) Draw position, velocity and acceleration graphs

    asked by Anonymous
  190. Geometry

    Make a valid conclusion in the situation. -If the measure of an angle is 90 degree, then it is a right angle. The measure of

    asked by Mandeep
  191. Force of Gravity

    How far from Earth's surface would you have to travel to be 1/4 your weight. Give your answer in Earth radii. I know you have to travel twice the distance or 1 Earth radii... I just don't know how to mathematically show it. Please help.

    asked by Alison
  192. Math Multiplication

    What are all the multiplication facts for 60,36,48,20,25,40,50,30,100,15,18,and 12?

    asked by Jamie
  193. Maths

    The first one iswhat angle does a 3.8m ladder make with the ground, if it reaches 2.1m up the wall? The second one is A concreter uses a ramp to wheelbarrow in sand from the ground level to floor level inside a building under construction. Floor level is

    asked by Tom
  194. math

    I'm a bit confused on the whole lesson on finding coordinates on a graph. With prime or double Prime, and with the shapes. if some can explain it to me in a easier way, that would be cool. Thanks! (sorry if I didn't explain my problem well enough)

    asked by dave
  195. Science

    What is apparent brightness and absolute brightness in Science

    asked by Coleson
  196. MATH

    A motorboat left a harbor and traveled to an island at an average rate of 11 knots. The average speed on the return trip was 10 knots. If the total trip took 4.2 hours, how far is the harbor from the island?

    asked by Anonymous
  197. English

    "No justice no peace" I have to write a paragraph that explains this quote and persuades us to think the way you have.

    asked by Layal
  198. English

    Write two paragraphs about how social media has changed the way you think about written communication

    asked by Layal
  199. physics

    A 2 μC charge is placed at × = 1 m while a second 2 μC Charge is placed at x=-1. Find (a) the electric field at y = 0.5 m, and (b) the electric force a -3 μC charge placed at y=0.5 m.

    asked by JAY Z
  200. Chemistry

    If we heat a 10 g sample of gold and a 10 g sample of iron with 50 kJ of energy each, which will have the greatest change in temperature? gold specific heat= 0.129J/g degC) iron specific heat = (0.452 J/g degC)

    asked by Izzy
  201. Physics

    A small fish is dropped by a pelican that is rising steadily at 0.44 m/s. After 2.6 s, what is the velocity of the fish? The acceleration of gravity is 9.81 m/s^2 Answer in units of m/s & How far below the pelican is the fish after the 2.6 s? Answer in

    asked by Valerie
  202. Chemistry

    A 5 oz carrot is burned in a calorimeter containing 10.0 lb of water. The water heats up from 20.5 oC to 22.8 oC. How many Calories are in the 5 oz carrot? Round to correct sig. fig. 1 Cal = 1000 cal.

    asked by Izzy
  203. Chemistry please help

    Complete each calculation. Express your answer to the correct number of significant digits. a)4.02mL + 3.76mL +0.95mL b)(2.7 x 10^2m) x (4.23 x 10^2m) c)5092kg divided by 23L d) 2-6.3 + 6-7 e)(6.853 x 10^3L) + (5.40 x 10^3mL) f)(572.3g + 794.1g) divided

    asked by Mary
  204. math

    solving equation 7(√x/1-x) + 8(√1-x/x) = 15 following roots are obtained

    asked by Nithin
  205. ECT

    ECT = Electronic Control Tech aka robotics So i need to make a project and i don't know what to make - not really homework but still please help me out.

    asked by Jared
  206. math

    A motorboat left a harbor and traveled to an island at an average rate of 11 knots. The average speed on the return trip was 10 knots. If the total trip took 4.2 hours, how far is the harbor from the island

    asked by nate
  207. Grade 10 Maths

    An area for planting crops is given by: A = 800 + 20x - 1/2x^2 Find the value of x which the area is a maximum

    asked by Julia
  208. Social Studies

    Which period of history was influenced by the classical Greek and Roman works? A. Renaissance B. Age of exploration C. Technology era D. Dark Ages Is the answer A?

    asked by Gwen
  209. maths a

    us e the formula z=x-u/SD to determine the z score for a score of 34.5 a normal distribution if the mean is 46.5 and the standard deviation is 8.7

    asked by jay
  210. physical science

    what causes friction?

    asked by cassidy
  211. math

    A motorboat left a harbor and traveled to an island at an average rate of 11 knots. The average speed on the return trip was 10 knots. If the total trip took 4.2 hours, how far is the harbor from the island?

    asked by Barbara
  212. Math

    Diagonal of rhombus are 24 and . Find its area and perimeter:/help me fast

    asked by Priyanka
  213. Social Studies

    Which of these goods and services is paid for with federal taxes? A. community roads. B. military bases C. public universities D. police protection. i think B

    asked by chris
  214. Geometry

    If EF= 10x+12, FG=14, and EG= 136, what is the value of x?

    asked by Shane
  215. geometry

    v=1/3TTr^2h;

    asked by marc
  216. Physics

    How long is Mayra, a ballerina, in the air when she leaps striaght up with a speed of 1.23 m/s?

    asked by Steven
  217. Arbitrary signs

    Can someone explain to me what arbitrary signs are and some examples.. The websites on google confuse me.. Does anyone know of any good sites?

    asked by Ullysses
  218. Math

    Roberta is planning to buy a new car the different options she have is 1) Regular transmission or heavy duty towing transmission 2) two-door, four-door, or five-door 3)color: sleek silver, midnight black, upward grey, bold blue, or steady red In how many

    asked by Malerie
  219. history

    Can somebody help me here. Reasons for the transformation in southern africa around 1750

    asked by saint
  220. Math

    Write 3 different numbers with 7 ones.

    asked by Dana carlton
  221. Science

    What is spectral broadening, Quasars, and the Expansion theory

    asked by Coleson
  222. math

    sum of 3 number is equal 39 , the second number is half of third number ,and the first number less than third number by 1,the result must be 6 degit ?

    asked by jo
  223. Math

    the best order-of-magnitude estimate for 0.00006? - 10^-3 - 10^-4 - 10^-5 * my answer - 10^-6 the best order-of-magnitude estimate for 789,000? - 10^7 - 10^6 - 10^5 - 10^4 *my answer I don't understand this quite well but I want to make sure my answers are

    asked by Anonymous
  224. Math

    What is the sum of all the positive numbers smaller than 100,000 where all digits can only be 1 or 0.

    asked by Kris
  225. Social Studies

    Which of the following is an example of how the first Americans adapted to their resources? A. The lived along coastlines and fished. B. Settlers near the Arctic circle built homes of reeds and branches. C. Settlers in present-day Mexico built houses of

    asked by Gwen
  226. Science

    What is a protostar

    asked by Coleson
  227. Biology

    What is a reactant that binds to a catalyst? Answer: a catalyst An enzyme is a kind of what? Answer: a substrate

    asked by Please help
  228. algebra 1

    Rod left his house driving south. Marsha left three hours later, driving 42 km/h faster in an effort to catch up to him. After two hours, Marsha finally caught up. Find Rod's rate.

    asked by kaylie
  229. Physics Help Please

    a) On the Acme W&W company production line, parts have to be transported 100 m by conveyor belt to a machine area. The parts move at a constant speed of 2.5 m/s. How much time does it take to move a part 100 m? b) On the same conveyor belt as described in

    asked by Tim
  230. PLZ HELP DUE TOMORROW!

    Write the numbers1, 2, 3, 10, 11, 12, 19, 20 and 21 into the fields of a 3x3 grid so that the sum of the numbers in each row, column and diagonal is the same. PLZ HELP DUE TOMORROW!

    asked by RIZ
  231. college math

    v=1/3ttr^2h; h(geometry)

    asked by Anonymous
  232. ?

    What challenge have you faced lately? ask at least 5 people

    asked by Anonymous
  233. History

    What was the Civil War about? I know it was between the North and South over slavery but what else

    asked by Jacen
  234. Algebra I

    I need formula's for figuring out % problems. example 7 is what percent of 4 or %125 of what is 85? or 22.2% of 45 is ?

    asked by Nancy
  235. Math

    Write 3 different numbers with 7 ones. ------- --------- --------

    asked by Dana carlton
  236. math

    How many liters of water should be evaporated from 110 liters of a 12% saline solution so that the solution that remains is a 20% saline solution

    asked by nate
  237. math

    What will be the answer of 4x(x-1)+5=0 when i'll use quadratic formula to solve it. Thank you ! ^___^

    asked by ghenny
  238. algebra

    (x/5) - g= a for x

    asked by brett
  239. Science

    What is red shifting and blue shifting

    asked by Coleson
  240. writing

    How do you write out a PEEL assessment?? (Point, Evidence, Evaluation, Language)

    asked by Molly
  241. Math

    (1 - 5 ) + 9

    asked by Kamryn
  242. Math

    ( 6-6 ) +7

    asked by Kamryn
  243. Acoustic

    A breathing sphere of radius 0.1m radiates spherical waves into air at 100Hz with an intensity of 200mW/m2 at the distance 0.5m from the center of the sphere. In this case, 1) Compute the radiated acoustic power. 2) Compute the intensity at the surface of

    asked by qwerty
  244. science

    Which of the following is an example of a physical system? hurricanes Volcanoes Glaciers Plant & Animal Communities ***All of the Above*** is it all of the above? Pls help asap!

    asked by SkatingDJ
  245. math

    Please solve these using the quadratic formula: 1. 3x^2-4(x-2)=0 2.a^2+2(a++5)=0 3.x^2-3(2x+3)=0 Thank you ^____^

    asked by ghenny
  246. Math

    ∑(x+y) c. ∑(x+∑(y)) d. ∑x+ ∑y e. ∑(x)+ ∑(y)* what do each of these mean? what's the differences?

    asked by Nicole
  247. math

    What fraction of 4/5 is 1/2?

    asked by math
  248. science

    If you had an object that measured 4.0 cm for width,and 4.5 cm for height.how would you calculate the volume for this object?

    asked by said
  249. Math

    ( 3 - 4 - 1 )

    asked by Kamryn
  250. Math

    ( 9 / 3 x 6 )

    asked by Kamryn
  251. Help Ms.Sue

    I just wanted to know how to do: What fraction of 4/5 is 1/2?

    asked by math
  252. chemistry

    If you have 0.833g of copper(II) sulfate, how many moles doo you have?

    asked by Anonymous
  253. Differential Equations

    Classify the following differential equations as linear or nonlinear: 3x' +5x=7t^2 4x^2+2x+5tx=0

    asked by Connor
  254. Science

    So what would you find something in the house? Product Symbols Precaution One example would be appreciated

    asked by Sally
  255. Poll

    Have you ever been a hero? If so, what did you do

    asked by Anonymous
  256. Acoustic

    How would you expect the directivity of the piston to vary as the temperature of air decreases? (Hint: Low temperature -> decrease of sound speed) 1.Directivity of the piston is independent of the temperature. 2.Directivity of the piston becomes smooth

    asked by qwerty
  257. math

    the ratio relationship betweeen 19:7 and 7 to 26

    asked by kayla
  258. Social Studies

    Early Americans became farmers and formed communities ounce they had A. Europeans to help them B. Money C. A dependable food supply D. Clay to build homes Is the answer C?

    asked by Gwen
  259. MATH

    v=1/3ttr^2h; h(geometry)

    asked by marc
  260. math

    You have several 5x11 rectangles, using only these rectangles, what can you make? A) 39x54 rectangle? B) a 39x55 rectangle? Plz help my parents are at work and sisters are doing homework, I'm 9 help!!! ( math due tomorrow!! )

    asked by RIZ
  261. Math

    4 x (2 +7 +6 )

    asked by Kamryn
  262. maths

    what number makes statement true: 30=0.3

    asked by sara
  263. math

    v=1/3tt^2h

    asked by Barbara
  264. math

    R=10 d=20 c=d||

    asked by elicia