Questions Asked on
September 23, 2016

  1. Calculus

    Suppose you know f′(a) = R, a, R > 0. If f is an odd function, what is f(−a)? Explain

    asked by Mauricio
  2. Physics

    If a man is able to row at 5m/s in still water and he points his boat at a 50 degree angle from the shore in an upstream direction in a river that's flowing at 4 m/s how far, either up or downstream will be land on the other side of the river if the river

    asked by Lyssa
  3. dosage calculations

    1. ORDER: CEFTRIAXONE 750mg PO BID ON HAND: CEFTRIAXONE 250mg tabs a) Calculate single dose b) calculate 24hr dose. I got this answer: a) 3 tablets as single dose b) 1500mg for 24 hours Please verify if it's correct.

    asked by John Doe
  4. Pre-Calc 20

    A rectangle has a diagonal of 18cm. The diagonal creates a 60 degree angle at the base of the triangle. Write an exact expression for the base and the height of the triangle.

    asked by Julie
  5. Chemistry

    8.4 g of a mixture of potassium hydroxide and potassium chloride were made up of 1 litre of aqueous solution. 20 cm of this solution required 24.2 cm of 0.1 m nitric acid for neutralisation. calculate the percentage by mass of potassium chloride in the

    asked by Doris
  6. Chemistry

    What volume of ammonia gas at s.t.p is required to neutralise 40 cm of 2 M sulpheric acid?

    asked by Doris
  7. Pre-Calc 20

    **EDIT** A rectangle has a diagonal of 18cm. The diagonal creates a 60 degree angle at the base of the triangle. Write an exact expression for the base and the height of the triangle. My teacher wants the base and height answered in roots so do you think

    asked by Julie
  8. Chemistry

    how many cubic cm hydrogen chloride gas at s.t.p would be required to precipitate all the silver ions from 32 cm of 0.08 M silver nitric solution?

    asked by Doris
  9. Chemistry

    84cubic centimeters of hydrogen chloride gas measured at s.t.p is dissolved in water and titrated with 0.15M sodium hydroxide.What volume of sodium hydroxide solution is required for complete neutralization?

    asked by Doris
  10. Chemistry

    20cubic centimeters of 0.27M sodium hydroxide solution is added to 18.2cubic centimeters of 0.75M hydrochloric acid.To the solution is then added excess magnesium.What volume of hydrogen gas measured at s.t.p evolved?

    asked by Doris
  11. Chemistry

    18cubic centimeters of 0.8Mlithium hydroxide is neutralized by 24cubic centimeters of 0.3Msulphuric acid.What is the formular of the salt formed?

    asked by Doris
  12. Maths, science

    An open box with square bases is to be made out of a given quantity of cardboard of area Csquare. show that the maximum volume of box is ccube/6√3cubic unit

    asked by Rishab
  13. algebra

    Give the answed of the question Doreen ran 4 miles farther than ludy. Together, they ran a distance of 20 miles.How far did each ran?

    asked by Liit
  14. chemistry

    If you transfer 5 J of energy to 1 g water and to 1 g ethanol, each starting at the same temperature which would have a higher temperature at the end? Water or ethanol? or will they have the same temperature at the end?

    asked by laura
  15. Social Studies

    What major advantage did the colonists have over the British during the Revolutionary War? A. colonists had more supplies than the British B. colonists had European support C. colonists had a better knowledge of the land than the British D. colonists had

    asked by Mia
  16. value

    two taps F And E are connected to a water tank.tap F can fill the tank in 2hours while E can empty it in 3hours.one day when the tank was a third full of water, the taps were opened at the same time.how long did it take to fill the tank?

    asked by value
  17. math

    the numerator of a fraction is 3 less than the denominator. if 4 us added to the numerator and to the denominator, the resulting fraction is equivalent to 3/4. find the original fraction

    asked by mm
  18. math

    the numerator of a fraction is 3 less than the denominator. if 4 us added to the numerator and to the denominator, the resulting fraction is equivalent to 3/4. find the original fraction. Show your solution

    asked by mm
  19. 12

    the product of 4 consecutive even number is always divisible by

    asked by Anonymous
  20. 12

    let X=(3^5^7^9)+1 find the last digit of x

    asked by Anonymous
  21. 12

    look at this series 940 940 931 931 922 922 ...what numbers should come next?

    asked by Anonymous
  22. chemistry

    is this statement true? More heat is needed for vaporization of a liquid compared with melting a solid of the same substance.

    asked by laura
  23. Operating System

    if relocation is used, what are the contents of the relocation is used registers for job1, job2, job3 after compaction?

    asked by Grace Andrada
  24. Calculus

    Even after looking up how to do this and reading about it I still don't know how to find the slope of curve or the deritives . Please help solve these problems. 1. Y =x^3 p(-1, -1) 2. Y = x^4 /2 p(-1 , 1/2) 3. Y= 8x^4 -7x^2 +5x + 6 p(-1,2)

    asked by Stephanie
  25. Math

    How to compare 0.7 and 5/8

    asked by Shawn
  26. math

    (i)prove that 1/1+sintheta +1/1-sin theta=2sec^2 theta

    asked by Mayank
  27. Chemistry

    How many grams of ammonia are needs to produce 0.5kg of NH42So4

    asked by Zeeshan
  28. economics

    This chart shows the components of nominal GDP for the years 2000 and 2001. All figures are in billions of current dollars. Components 2000 2001 Consumption $6,684 $6,987 Investment $1,755 $1,560 Government Spending $1,751 $1,858 Exports $1,101 $1,034

    asked by mary
  29. math

    Jannah spent 2/3 hour doing her homework. How much minutes did she spent doing her homework?

    asked by lyza
  30. Math

    Ashleigh moed 50 lawns last Month. Keshia mored 40 less than twice than ashleigh. How many laws did Keisha moe

    asked by Anonymous
  31. ,ath

    Mr. Riley can make a profit by raising AT LEAST 50, but no more than 150, cattle. If c represents the number of cattle, write the inequality that best expresses the situation.

    asked by Lidia
  32. Trigonometry

    a) The ship left the port and sailed for 2 hours on a course of 75O, at an average speed of 2.5 nautical miles per hour. b) North It changed its course to 165O and travelled for 3 hours, at an average speed of 4 nautical miles per hour. Your team is tasked

    asked by Prince
  33. Trigonometry

    a) The ship left the port and sailed for 2 hours on a course of 75 degrees,at an average speed of 2.5 nautical miles per hour. !@#$%^&anged its course to 165 degrees and travelled for 3 hours, at an average speed of 4 nautical miles per hour. Your team is

    asked by Prince
  34. Geometry and algebra

    A rectangle wother does 12 and 16 cm is inscribed in a circle with centre of.a dart is thrown and lands in the interior of circle what is its probability of dart that lands in the shaded region

    asked by Soniya
  35. Math

    5/16+7/16

    asked by Eureka
  36. Math

    Suppose f(t) = P0e^-0.3t grams of radioactive substance are present after t seconds. If 200 grams of substance are present initially, how much is present after 4 seconds? What is the half-life of the substance?

    asked by Freud Mark
  37. maths

    If mewi=xi-25/10 and sigma fiui=20 and sigma fi=25 what is the mean?

    asked by sanjay
  38. Social Studies

    What were some of the advantages the continental army had over the British? Select all that apply. Fighting on familiar territory*** A large navy More troops*** Better supplies

    asked by Jen
  39. Maths

    I have a map with a scale of 2cm to 5 km. On the map, two towns are eight cm apart. What is the actual distance between the two towns?

    asked by Anonymous
  40. calculus help

    if y^3=6xy-x^3-1 show that the maximum value of y occurs where x^3=8+2sqrt(14)

    asked by samson
  41. facilitating human learning

    gawa naman po kayo ng Research Paper about metacognition po. Please really need po talaga. yung may rationale, methodogy at findings po.

    asked by skusta
  42. American Government

    Citizens of the United States are required to do which of the following? A) memorize the Pledge of Allegiance. B) vote**** C) pay taxes D) marry an American citizen I choose B if not C maybe? Can you correct me if i'm wrong.. thanks!!

    asked by Unknown
  43. Algebra 2

    s=prt solve for t Don't know where to start help!

    asked by Becky-G
  44. social studies

    1. Which factor best explains why Native Americans were able to make permanent settlements? Native Americans began to cultivate plants for food. Native Americans began to create more complex tools and pottery. Native Americans discovered alternative food

    asked by syn
  45. math

    Greg rubs the balloon on his wool sweater, and the charges on the balloon separate so that there are negative areas and positive areas. Which of these statements correctly describes what happens as a result?

    asked by Olivia (but call me Oli)
  46. GEOMETRY

    Find the coordinates of the points that divide the segment A(-6, -3) and B(3, 1) into three equal parts.

    asked by MARIA CHRISTINA
  47. math

    You purchased a suit on sale for $220 that was originally priced for $275. what was the percent of discount?

    asked by Anonymous
  48. Math

    Determine whether the given numbers are solutions of the inequality. 6, -19, -18, -3 y-9>2y-2

    asked by Nikki
  49. Career

    Please check my answers. Thank you! The amount of goods and services that people want to buy. Producers Consumers Supply Demand* Question 2 (Multiple Choice Worth 10 points) (02.08 LC) Knowledge and tools that enable us to do new tasks more efficiently are

    asked by Anonymous
  50. Physics

    Given the masses of the sun and earth are 1.99x10^30 kg and 5.98x10^24 kg respectively. Calculate the gravitational force between them when their centers are 1.50x10^11m apart

    asked by Yasmin
  51. Math

    Math question: My plane arrived in Chicago 45 minutes later from Detroit. How fast was my plane which traveled at about 20000 altitude?

    asked by Lisa
  52. Algebra

    The graph of g(x) is the graph of f(x)=x^2 shifted 4 units left, vertically stretched by a factor of 3, then shifted 5 units up. What is the function rule for g(x)?

    asked by Anonymous
  53. Sociology

    What were some barriers to radical social change that could have made things better for freed people following the Civil War and Emancipation Proclamation?

    asked by Randy
  54. English

    1. I'm watching TV. 2. I'm watching the TV. ------------------------------ Which one is grammatical?

    asked by rfvv
  55. Chem

    A patient receives 3.5 L of glucose solution intravenously (IV). If 100. mL of the solution contains 5.9 g of glucose (carbohydrate), how many kilocalories did the patient obtain from the glucose solution?

    asked by Asia Thomas
  56. History

    why is poverty point considered an extraordinary archaeological find ? A)it is considered evidence if prehistoric life in Louisiana B)many artifacts were found on this site C)the earthwork was built with 30 million loads of dirt hauled by people D)it was

    asked by Alexis Davis
  57. English

    Identify the protagonist from Henry James "Europe" . I was thinking about this and I don't know who the protagonist would be since the story focuses on Mrs Rimmie but she's not really a positive character ? Would it be the narrator?

    asked by Rea
  58. world geography please check my answers

    1. Which is not a factor contributing to poverty in Africa? (1 point) long periods of drought and desertification a sudden decline in unemployment drastic increase in population leading to a shortage in available resources an inability to establish a

    asked by oto
  59. Math

    find three consecutive positive integers such that 4 times the first 13 more than the third.

    asked by Kevin paniagua
  60. English

    What are the action and be verbs in this sentence ? In 1999, I went to Disney World for vacation.

    asked by Reshell
  61. physics

    An electron with a speed of 1.9 × 107 m/s moves horizontally into a region where a constant vertical force of 6.0 × 10-16 N acts on it. The mass of the electron is 9.11 × 10-31 kg. Determine the vertical distance the electron is deflected during the

    asked by bigd
  62. English

    All the underlined words are in all capitals and all the bold words are in all capitals also. 1. Choose the meaning of the bold word. They appeared to me DENIZENS of a brilliant existence. (“The Bass, the River, and Sheila Mant") actors environmentalists

    asked by M
  63. algebra

    john runs .5 miles per day. if he increases .5 miles a day, how many days until he reaches 7.5 miles?

    asked by D-Man
  64. Grammar

    Which is correct? I think the second one is correct. 1. Thank you John, Peter, Susan, and Veronica to be a part of the crew. OR 2. Thank you John, Peter, Susan, and Veronica for being a part of the crew.

    asked by Vivian
  65. history (check my work)

    . Which of the following provides the best definition of a strict constructionist interpretation of congressional power? (1 point) Congress must have more powers than the states. Congress should only use implied powers when directly connected to expressed

    asked by kate
  66. Health care tech

    RNs who receive additional training and certification in pregnancy and childbirth are called: nurse practitioners. nurse anesthetists. nurse midwives. licensed practical nurses. None of these Practioners are more right help??

    asked by Anonymous
  67. Algebra

    What is the Solution to -54/x = -6? A. X = 9 B. X = -6 C. X = 6 D. X = 9 I do not really understand this question can someone help me? (Not asking for a answer) And whats the difference between |-8| and 8? Arnt they the same? One last question i don't

    asked by Help please
  68. health care tech

    Each of the following are specific transaction standards for types of electronic data interchange EXCEPT: claims status. employment status. enrollment and deenrollment in a health plan. first report of injury. premium payments. Help

    asked by Anonymous
  69. History/Government

    Please check my answers. What does the phrase jus sanguinis refer to? A. Citizen by birth on US soil B. Citizenship by serving in the armed forces of the US C. Citizenship by marrying a US citizen D. Citizenship because ones parents are US citizens

    asked by Mira
  70. Social studies NEED HELP

    I am Dekanawidah and with the Five Nations' Confederate Lords I plant the Tree of Great Peace. I plant it in your territory, Adodarhoh, and the Onondaga Nation, in the territory of you who are Firekeepers. I name the tree the Tree of the Great Long Leaves.

    asked by Cassidy Ziegler
  71. science

    Compare the costs and benefits of hydropower to that of geothermal power. (Please include two costs and two benefits.)

    asked by Leah
  72. Algebra

    What is f(4) if f(x)= |3x + 4| - 2

    asked by Anonymous
  73. Math

    Is |-13| and -13 the same or different?

    asked by Mathhhhh
  74. Engineering Math

    An unknown radioactive element decays into non-radioactive substances. In 120 days the radioactivity of a sample decreases by 59 percent. What is the half life of the element? How long will it take for a sample of 100 mg to decay to 77 mg? The answer is

    asked by Erica
  75. science

    How many mole of FeSO4 with one mole of KMnO4 in acidic medium?

    asked by yogita
  76. Social Studies

    Which statement beat explains why people in west Africa eat manioc? Europeans introduced manioc to Africa after encountering it in America. Early native Americans established trade routes with west Africans Manioc is native to west Africa and a traditional

    asked by Cassidy Ziegler
  77. Social studies

    which was the most significant factor in the spanish conquest of the aztecs and incas? Armor•• Disease Guns Horses

    asked by Cassidy Ziegler
  78. maths

    A Variable Tangent To The Ellipse (x/a)^2 + (y/b)^2 =1 meets the parabola y^2=4ax at L and M. Find the locus of the midpoint of L M

    asked by Joel
  79. Physics

    If C⃗ = -5 i^ - 3 j^ - 4 k^, what is C⃗ × j^?

    asked by Tom
  80. check my work

    1. Which of the following provides the best definition of a strict constructionist interpretation of congressional power? (1 point) Congress must have more powers than the states. Congress should only use implied powers when directly connected to expressed

    asked by kate
  81. Physics

    A large engine with mass of 400 kg must be lifted 3 meters out of a truck for repair. A normal mechanic can lift with about 250 N of pulling force. They use a system of pulleys to do this. If we assume the engine starts on the ground, how long must the

    asked by PizzaIsYum
  82. Physics

    Keisha throws a baseball with an initial velocity of 30 m/s at 30.0° above the horizontal. If air resistance is negligible, how long does it take for the baseball to reach the maximum height of its trajectory? Assume that the acceleration due to gravity

    asked by Jared
  83. Social studies NEED HELP

    What was the primary goal that Spanish settlers shared in the south and southwest regions? Gaining global power Finding wealth Conquering the native Americans •• Entering the fur trade business

    asked by Cassidy Ziegler
  84. Social studies NEED HELP

    which of the following were problems faced by the english colonist at jamestown? The colony employed many indentured servants and paying them was different •• They Settled in an insecure location and were vulnerable to Spanish attack The location of

    asked by Cassidy Ziegler
  85. Engineering Math, Newtons Cooling Method

    Newton's equation for a free falling object with air resistance of mass m kilograms says that its velocity v(t) satisfies the DE mv'(t) = mg - kv(t) where g = 9.8 \frac{m}{s^2} and v(t) is measured in \frac{m}{s}. Suppose that k=2 \frac{kg}{sec} and that a

    asked by Erica
  86. math

    a respie requires 2 cups of flour to make 10 servings and 8 cups of flour to make 40 servings. How many cups of flour are needed to make 30 servings

    asked by grace
  87. physics

    a stone is thrown vertically upward an initial velocity of 12m/s from the top of a building . it takes 3.4s for the stone to hit the ground a. find the height of the building b. find the maximum height that the stone will reach c. find the speed of the

    asked by khadija
  88. math

    n-2=10n+4 over 2 what is the value of n?

    asked by Mei misaki
  89. 5th grade math

    insert in parentheses: 14+2=6+2x3+2

    asked by john
  90. Organic Chemistry

    One sample that is 1mm in height has a melting point range of 200-201. What would be the melting point range of a 10mm sample in height if both samples heating rate is 2 degrees Celsius per minute? I'm thinking it would be about 2000-2010 but I'm not fully

    asked by Karnvir
  91. Engineering Math

    I don't know where to start on this one. A thermometer is taken from an inside room to the outside, where the air temperature is ten degrees Fahrenheit. After one minute the thermometer reads 40 degrees Fahrenheit, and after two minutes it reads

    asked by Erica
  92. math

    0.61m-1.51m=9 m=?

    asked by Haruhi Fujioka
  93. Language Arts

    1 - Which word can be a synonym for the word PERSISTENT? A. weak B. stubborn ** C. dishonest D. unclear 2 - Which word is similar in meaning to the word SUPPRESSED? A. obvious B. indirect C. perceived D. stifled **

    asked by Laytinna
  94. ODE Piecewise

    Solve the piecewise linear ODE, y' - y = f(x), y(0) = 1, where f(x) = 1 when 0 \le x \le 1 and f(x) = -1 when x > 1. What is y(2)? Round to the nearest tenth. I stated and got y'-y= ce^x , but wasn't really sure if that was right so I didn't know where to

    asked by Erica
  95. math

    The spinner below is used in a game, if you spin the spinner once what is the probability that it will land on a multiple of 3 or an even number

    asked by AnonymousAnonymous
  96. math

    −2(x+2/3)+1=5 x=?

    asked by Haruhi Fujioka
  97. math

    2k+9=7−3k k=?

    asked by Haruhi Fujioka
  98. math

    3n + 16 = 7n n=?

    asked by Haruhi Fujioka
  99. math

    13m+3−56m=−15 m=?

    asked by Haruhi Fujioka
  100. Math

    1. Which of the following numbers is an example of an integer? -15 * 0.252525 . . . 3/5 (fraction) Square root of 7

    asked by Kiru
  101. Newtons Cooling Method

    Instructions Assume that goat milk butter melts at {85.25}^{\circ} F. On a summer day you take a stick of butter out of the refrigerator, which is set to {36.5}^{\circ} F, and put it on your front porch where the temperature is {89.5}^\circ F. (a) By

    asked by Erica
  102. physics

    A baseball has a mass of 145 g. A bat exerts a force of 18,400 N on the ball. What is the acceleration of the ball

    asked by keke
  103. math

    the schematic of a rectangular patio is drawn 1/8 inch to a foot if the patio is 18 feet long what is the measure of the patios length on the schematic

    asked by mark
  104. maths trig

    A flag in the form of an equilateral triangle is connected to the tops of 2 vertical poles. One of the pole has a length of 4 and the other pole has a length of 3. You also know that the third vertex touches the ground perfectly. Calculate the length of a

    asked by samson
  105. math

    The length of a rectangle is 1m more than its breadth. find it's length and breadth if the area is 12

    asked by festo questo
  106. Math

    If a. Bathroom area is 8500 inches. And the tiles are 6 by 13ins, what's the least amount of tiles needed to cover area?

    asked by Hadassah
  107. Physics

    A person in a kayak starts paddling, and it accelerates from 0 to 0.568 m/s in a distance of 0.389 m. If the combined mass of the person and the kayak is 79.5 kg, what is the magnitude of the net force acting on the kayak?

    asked by BrookeNeed
  108. Math , trigonometry

    From a point on the ground 20m from the base of a tree the angle of the elevation to the top of the tree is 47 degrees. Calculate the height the of the tree correct to the nearest metre ???

    asked by Sarah
  109. Physics

    A car of mass accelerates from rest to a speed in time with negligible friction and air resistance. What is an expression for the average power delivered by the car's engine? a) Mv22t b) Mv2t c) Mvt D) Mv2t

    asked by Jared
  110. Physics

    A box of mass m slides down an inclined plane that makes an angle of φ with the horizontal. If the coefficient of kinetic friction is μk, find an expression for the acceleration of the box down the slope. The acceleration due to gravity is g. a. g (

    asked by Tom
  111. chemistry

    In a titration of malic acid, what is the pH after: a. 0.75 molar equivalents of NaOH have been added? 1 b. 1.30 molar equivalents of NaOH have been added?

    asked by Aria
  112. chemistry

    You discovered a new diprotic acid, which you have named edmontonic acid. You want to characterize the pKa’s of edmontonic acid, so you perform a titration experiment. Your data are summarized in the table below. Your titration sample contains 150 mmol

    asked by Aria
  113. chemistry

    Bicine is an amino acid, but not a building block of proteins. Rather, it is a reagent commonly used in the biochemistry laboratory. Bicine contains two ionizable groups: tertiary amine (pKa 8.3) and carboxyl (pKa 2.3) a. For each of the ionizable groups

    asked by Aria
  114. Physics

    At an instant when a soccer ball is in contact with the foot of the player kicking it, the horizontal or x component of the ball's acceleration is 930 m/s2 and the vertical or y component of its acceleration is 930 m/s2. The ball's mass is 0.39 kg. What is

    asked by BrookeNeed
  115. Chemistry

    The efficacy of certain drugs is affected by pH. Many drugs are absorbed into the blood through cells lining the stomach or the small intestine by direct diffusion across the plasma membrane. Since the interior of the plasma membrane is hydrophobic,

    asked by Aria
  116. Math

    A population of 41,250 increases each year by 2%

    asked by Lee
  117. Math

    Fnd domain K(x)=6square root 2x+1 -5 and g(x)= 2x^3+ square root x+6 I think its all real numbers since there isnt a domain to determine... sooo im not sure if its right

    asked by Dilly
  118. Math

    A projectile is fired with an initial muzzle speed 190 m/s at an angle 60 from a position 5 meters above the ground level. Find the horizontal displacement from the firing position to the point of impact. I know that y=vsin(60)t-.5gt^2 and x=vcos(60)t. but

    asked by Ken
  119. math

    Jennifer walked 4 miles in 40 minutes. Predict how far she would walk 6 minutes if she continues to walk at the same pace.

    asked by Anonymous
  120. Math

    The coach of a junior league baseball team must choose 3 players to play as fielders from 9 young people who have tried out. In how many ways can these three players be chosen?

    asked by Eugene
  121. Math

    I just have a question. How would you explain how to graph information from a ratio table?

    asked by Matt-Please Help
  122. social studys

    what was the purpose of the olive branch petition? A.to declare war on england B.to raise a colonial army C.to declare allegiance to the king of england D.to convince france to enter the war is it C?

    asked by Darius
  123. Math

    1, In one school, 5/6 of the 6th graders take a foreign language. of these students, 2/5 take French. a. What fraction of the 6th graders take French? 5/6 x 2/6= 1/3 b. If there are 150 6th graders,how many take French? 150/1 x 1/3 =5/3 ?

    asked by Chris Mac
  124. math

    Solve. 3x < 18 A) x < 6 B) x > 6 C) x < 15 D) x > 54

    asked by Anonymous
  125. University South Carolina

    A movie theater has fixed costs of dollar-sign 9000 per day and variable costs averaging dollar-sign 3 per customer. The theater charges dollar-sign 12 per ticket. How many customers per day does the theater need in order to make a profit? Give the

    asked by Anonymous
  126. Government

    Of the following choices, which ones are concidered democratic values?(2 points) Serving the military Honesty **** Patriotism **** Voting in an election Please check my answers. :)

    asked by Lexi
  127. Social studies

    What is the name given to a hook or curved area of land that extends into a sea or a Ocean

    asked by Mimi
  128. structural grammar

    Identify: May I go to the library?

    asked by Jordan
  129. Algebra

    Are there two integers with a product of -12 and a sum of -3?

    asked by Becky-G
  130. Chemistry

    Given a 800 mg sample of Thorium-231 decomposes via beta emission with a half life of 25.5 hours, how long would it take, in days, for the sample to decay down to 25 mg? 231 0 231 Th -> Beta + Pa 90 -1 91 800 mg/ 25 mg

    asked by Lauren
  131. Biochem

    You prepare a 1L solution of 0.5 M imidazole. (pKa= 7.05). Calculate the pH of the solution after you add 0.1 moles of HCl. I need to create an ICE table. I also know I need to use the Henderson- Hasselbalch equation but I'm confused on what to plug in.

    asked by Ashley
  132. Government

    One more thing... To be a citizen, one of the options include being a person of foreign birth successfully completes the naturalization process right? I studied it and it is always including the naturalization process.

    asked by Lexi
  133. C++

    // Program: name of program // Author: your name // Date Written: date you began writing the program /* Abstract: Brief description of the program */ Include in-line comments in the body of your program. You can convert temperature from degrees Celsius to

    asked by Frank
  134. Physics

    A dart is being thrown at a board that is 2.80 m away. When it hits the board it is 0.486 m below the point where it was aimed and it was thrown at 8.90 m/s. How long was the dart in the air?

    asked by Brooklyn
  135. Science

    I have a 91 as my average now. I only have two weeks left. What do I need to get and a (93)?

    asked by Lexi
  136. math

    ted Williams made deposits of 500.00 at the end of each year for eight years. the rat is 8% compounded annually. calculate the value of ted's annuity at the end of eight years

    asked by jackie
  137. Physics

    Christiano Ronaldo kicks a soccer ball with an initial velocity of 24.0 m/s at an angle of 25.0°. How far away does the ball land?

    asked by Brooklyn
  138. chemistry

    In a large building, oil is used in a steam boiler heating system. The combustion of 1.0 lb of oil provides 2.2×107J. Part A How many kilograms of oil are needed to heat 110 kg of water from 24 ∘C to 100∘C? (Assume that 1lb=454g, the specific heat of

    asked by john
  139. math

    when are annuity due payments made

    asked by jackie
  140. Social studies

    I am lost .. Why did the great compromise establish a two-house legislature? A:to fairly represent all states B:to allow for population growth C: to provide checks and balances D: to prevent unconstitutional laws***? In what way did the structure of the

    asked by Lexi
  141. MATH VECTOR

    1. Determine the resultant of each vector sum a) 45 km/h vertically and then 75 km/h horizontally. b) 300 m east and then 400 m N45¡ÆE

    asked by WON
  142. MATH VECTOR

    Nancy is a pilot in Canada¡¯s North. She needs to deliver emergency supplies to a location that is 500 km away. Nancy has set the aircraft¡¯s velocity to 270 km/h on a northbound heading. The wind velocity is 45 km/h from the east. Determine the

    asked by WON
  143. VECTOR MATH

    In an orienteering race, you walk 100 m due east and then walk N70¡ÆE for 60 m. How far are you from your starting position, and at what bearing?

    asked by WON
  144. Geometry

    If there are 7.48 gallons of water in a cubic foot, how many gallons of water is needed to fill a pool that is 2,260.8 cubic feet?

    asked by Nae
  145. chemistry

    A sample of CaCl2⋅2H2O/K2C2O4⋅H2O solid salt mixture is dissolved in ~150 mL de-ionized H2O. The oven dried precipitate has a mass of 0.253 g. The limiting reactant in the salt mixture is K2C2O4⋅H2O. Determine Mass of K2C2O4⋅H2O(aq) in Salt Mixture

    asked by maricela
  146. US goverment

    what is the difference between a regular session of congress and a special session of congress A. a regular session has all the members, while a special session only has a few members B. a regular session is for making laws, while a special session is for

    asked by Us
  147. Math

    The limit as x approaches negative infinity is (3x^5 + x + 2) / (8x^4 - 5) a. DNE b. 0 c. -3/8 d. 3/8 I think the answer is Choice C, but I was stuck between this answer and Choice D.

    asked by Dave
  148. Science

    A 0.5kg mass connected to a light spring of constant 20N/M occilates on a frictionless track. Calculate the total energy of the system

    asked by Charles
  149. maths

    Raimo borrowed $830 from Chris on October 19 and agreed to repay the debt with simple interest at the rate of 5.1% on May 18. How much interest was owed on May 18? Assume that February has 28 days.

    asked by sukhman
  150. Physics

    An arrow is shot from a height of 1.4 m toward a cliff of height H. It is shot with a velocity of 28 m/s at an angle of 60° above the horizontal. It lands on the top edge of the cliff 3.6 s later. a) What is the height of the cliff (in m)? I got 25.191 m

    asked by A