1. Math!

    Consider the integral from 3 to 6 S(2x^2+4x+3)dx (a) Find the Riemann sum for this integral using right endpoints and n=3. (b) Find the Riemann sum for this same integral, using left endpoints and n=3.
  2. Algebra

    Kevin has $6.45 in coins in his cash box. The numbers of quarters is one less than twice the number of dimes. The number of nickels is one less than twice the number of quarters. The value of the pennies is the same as the value of the nickels. How many of
  3. math

    Nine cards are numbered 1-9. what is the probability of drawing a number greater than 6 or an odd number. I know the answer is 2/3 but I don't know how you find the probability when it says "greather than 6 OR and odd number"... how do you calculate the
  4. college algebra--please help

    what does Descartes rule of signs tell you about the possible number of positive real number zeros and the possible number of negative real zeros of the function? 1. f(x)=2x^5-5x^2+x-1 2. f(x)=5x^6+7x^4-x-6 please show work
  5. math

    Mr.Jenkin's age is a composite number. The number in the ones place is the product of 2x4. The number in the tens place is the difference of half a dozen from one dozen.How old is Mr. Jenkins?
  6. Help me please

    Find a number that is decreased by 12 when you form half of the number, explain how you got your answer. It reads to me that n/2 + 12 = n multiply each side by two... n+24=2n subtract n from both sides n-n+24 = 2n-n 24=n check it. Take one half of 24, or
  7. physics

    Vector (V1) is 6.3 units long and points along the negative (X) axis. Vector(V2) is 9.0 units long and points at 55 degree to the positive (X)axis. 1- What are the (X) and (Y) components of (V1) vector ? 2-What are the (X) and (Y) components of(V2) vector
  8. Geometry

    I'm so confused on distance formula, I know how to calculate it, but getting the final simplified answer is so confusing. Like so on some equations the final answer is just a regular whole number, others is a number with a square root like 3 -/2, or a
  9. algebra

    I am the middle of 3 numbers whose total is 31. The largest is 3 more than 5 times the smallest. What # am I? 1st number I put as x 2nd number I put as y as long as y> x 3rd number is 3+5x=z X+y+z=31 so when I plug it in I get X+y+3+5x=31. Y=28-6x Now
  10. math 115

    1. in the number 854,263,189 what number tells the number of thousands? Is the answer 3? 2.round 16,851 to the nearest thousand. 17,000 is this correct? 3.Evaluate 260/(4^3 + 1)= 260/65=4 is this correct?
  11. lively

    Suppose that four times the square of a number equals 20 times that number. Whatis the number? It'll take you 45 seconds if you just plug in a few numbers Again -- putting the subject in the subject line helps. =) 4 n^2 = 20n zero is one solution. Solve
  12. Algebraic word problem

    Three friends Alex, Ben, and Casey presented a young mathematician with a puzzle. They told him that the sum of their ages add up to 98 years. Double Alex’s age and add to Ben’s gives 84 years. The sum of three times Alex’s age and twice Casey’s
  13. Math

    The number of locks is 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
  14. math

    sam is making a number line and wants to make a point for 3/4 on the number line. Into how many parts should he divide the number line?
  15. math

    the 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,
  16. 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?
  17. Math

    need to describe 3 different problem solving approaches to this problem, one I think is algebra, but don't know how to solve, and i need to say how to solve each one in each different way, please help with this. aaron is thinking of a number, if its
  18. algebra

    which relationship can best described as casual? (1)height and intelligence (2)shoe size and running speed (3)number of correct answers on a test and test score (4)number of students in a class and number of students with brown hair
  19. 5th grade

    Kathy gave her friends clues about a number she was thinking of.She told them when her number is doubled and added to 10,the result is 58. What is the number Kathy is thinking of?
  20. Chemistry

    Does anybody know the principle quantum number of an atom that has s, p, d, f orbitals? I'm pretty sure the number is inbetween 2-4, but I am unsure of how to figure out the principle quantum number just using that information. Thanks in advance!
  21. Math

    (This is a question where we have to fill in the blank) So: 2 3 5 ? 12 11 16 26 41 ? It's a number sequence question and I need to fill in the ? as well as write a rule in words. PLEASE HELP!(And the top number has to relate with the bottom number)
  22. Math

    Find the least and greatest possible original numbers: ROUNDED PLACE is Ten Thousands, ROUNDED NUMBER is 190,000. What is the Least number and the Greatest number?
  23. math

    Ben rolls a standard number cube (sides labeled with numbers 1 through 6). Find the probability that Ben rolls a number greater than 2 or an even number.
  24. math((PLEASE HELP!))

    If two numbers are written in scientific notation. how can you tell which number is greater? Where on a number line does the value of a positive number in scientific notation with a negative exponent lie?
  25. number patterns

    mrs brander has 30 tomato plants .she wants to plant the same number of plants in each row of her garden.explain how she could decide the number of rows to plant
  26. Math

    Which is a reasonable remainder when a number is divided by 7? a. 8 B. 9 C. 7 D. 5 Be sure to let us know what YOU think, and someone here will give you feedback. =) i think it is c well k. i thaught it was 5 since its under 7 cause all the others are 7 or
  27. math

    Ben rolls a standard number cube (sides labeled with numbers 1 through 6). Find the probability that Ben rolls a number greater than 2 or an even number.
  28. English

    This is the number of years that someone has lived , or that something has existed. (What is the part of speech of 'that'? Is 'that' a relative adverb or a relative pronoun? What is the antecedent of 'that'?) English - Writeacher, Sunday, December 5, 2010
  29. Math

    It's 7 #s long Hint 1: The first number times the last number will always equal the last number (first*last=last) Hint 2: fourth number minus the last number equals the third number (fourth-last-third) Hint 3: first number - sixth number equals fourth
  30. MATH FOR LIBERAL ARTS

    Determine a casino's expected net income from a 24-hour period at a single roulette table if the casino's total overhead for the table is $50 per hour and if customers place a total of $7,000 on single-number bets, $4,000 on two-number bets, $4,000 on
  31. Mathematics for Liberal Arts

    Determine a casino's expected net income from a 24-hour period at a single roulette table if the casino's total overhead for the table is $50 per hour and if customers place a total of $7,000 on single-number bets, $4,000 on two-number bets, $4,000 on
  32. Math

    Which is a good comparison of the estimated sum and the actual sum of 7 7/8 + 2 11/12? A. Estimated < actual B. Actual> estimated C. Actual = estimated D. Estimated < actual I chose D
  33. .....

    What would make this statements False. The opposite of each natural number is a natural number. There is no whole number that has an opposite that is a whole number.
  34. algebra(check)

    1)Find a1 in a geometric series for which Sn=300,r=-3,and n=4 a.15 b.15/2 c.-15 d.1/15 answer=a 2)Find the sum of the infinite geometric series n=1 at the bottom of the sigma notation 20(-1/4)n-1 on the right side a.25 b.80/3 c.16 d.does not exist answer=c
  35. physics

    In the sum Vector A plus Vector B equals vector C, vector A has a magnitude of 11.6 m and is angled 36.5° counterclockwise from the +x direction, and vector C has a magnitude of 14.0 m and is angled 17.1° counterclockwise from the -x direction. What are
  36. Chemistry

    write isotpoic symbols of the form X-A (for example, C-13) for each of the following isotopes. **Do I add the number of protons and neutrons together to get the answer? The symbol is easy to figure out.** a) the iodine isotope with 74 neutrons B) the
  37. chemistry

    Quantum numbers arise naturally from the mathematics used to describe the possible states of an electron in an atom. The four quantum numbers, the principal quantum number (n), the angular momentum quantum number (ℓ), the magnetic quantum number (mℓ),
  38. math

    Of the 50 state in the united state, 8 states have a population of one million people or fewer.Make a plan and write an addition equation to show that the sum of the state with more than one million people and the states whith one million people or fewer
  39. Word problem help plz

    The sum of the age of father and son is 99.if the age of the son is added to the inverted age of the father,the sum is 72.if the inverted age of the son is subtracted from the age of the father.the difference is 28...what are there age? plz help i do not
  40. please help

    i need help setting up 2 equations. The sum of the radius,r, times 2 and 3 equals 4 less than the radius,r. The sum of the radius, r, times 13 and 15 equals 16 less than twice the radius,r.
  41. math

    The sum of the reciprocals of two consecutive even integers is 11/60. Find the integers....... 1/n + 1/(n+2) = 11/60 what is the question? the question is, "What is the value of the integers? I will be happy to critique your work. We don't do it for
  42. algebra

    There are 51 students in a certain class. The number of females is 5 less than 3 times the number of males. find the number of females and the number of males in the class.
  43. math foe managers

    f 5 times the first number plus 3 times the second number equals 47, and 10 times the first number minus 4 times the second number equals 54, what are the numbers?
  44. algebra

    if 5 times the first number plus 3 times the second number equals 47 and 10 times the first number minus 4 times the second number equals 54, what are the numbers? please explain the steps
  45. LABOUR ECON...TAX QUESTION

    k here is the question suppose a government imposed an employment tax. That is upon entering the labour force an, individual had to pay a lump sum tax. (if they don't work, they don't have to pay the tax). How ould this affect the individual's labour
  46. math

    1)Find a1 in a geometric series for which Sn=300,r=-3,and n=4 A)15 B)15/2 C)-15 D)1/15 I chose A 2)Find the sum of the infinite geometric series. Sigma sign with infinity symbol above and n=1 below. To the right 20(-1/4)n-1 A)25 B)80/3 C16 D)does not exist
  47. math, English, geography, chemistry, physics, economics,

    the number 1 to 20 are written on pieces of paper and put in the box. if a piece of paper is picked at random, what is the probability of picking a paper with: an odd number, a prime number, a multiple of 3 and a square numbe
  48. Math

    Hi I am after some help starting this question. A local hardware store sells three types of boxes; small, medium and large. The cost of the boxes are; small $10, medium $20 and large $30. In the previous week a total of 1200 boxes were sold resulting in
  49. Math--linear systems

    A local hardware store sells three types of boxes; small, medium and large. The cost of the boxes are; small $10, medium $20 and large $30. In the previous week a total of 1200 boxes were sold resulting in proceeds of $20 000 for the week. The number of
  50. domain

    How do you find the domain of log(x^2-4)? and how about this one? e^(3x+4)? Please help me! Well kristie, you might recognize log(x^2-4) = log((x-2)(x+2)) and then use a property of logs to see it as a sum, i.e., log(ab)=log(a)+log(b). You are then
  51. gems

    The sum of present age of father nd son is 82 .when the father age was equal to the present age of son .the sum of their age is46.find their present age
  52. math

    Can someone help me with prime and composite numbers? Prime numbers are counting numbers that can be divided evenly bt only two numbers:1 and themselves. A prime number can also be described as a counting number with exactly two factors, 1 and itself. So,
  53. Math! Please check!

    Okay, so this one is going to be a bit difficult to answer as I cannot post my number line, so you may just have to visualize it, or draw it out on paper. If HI = GM at what coordinates could point M lie? Point H is at 8 on the number line and point I is
  54. math(need 2nd opinion)

    1)Find a1 in a geometric series for which Sn=300,r=-3,and n=4 A)15 B)15/2 C)-15 D)1/15 I chose A 2)Find the sum of the infinite geometric series. Sigma sign with infinity symbol above and n=1 below. To the right 20(-1/4)n-1 A)25 B)80/3 C16 D)does not exist
  55. Math

    1. Where is 4.89 on the number line Between 1 and 2 Between 2 and 3 Between 3 and 4 Between 4 and 5 <--- 2. 7.07 __ 8.83 a. < <--- b. > c. = d >= 3. Where is 8.366 on the number line? Between 6 and 7 Between 7 and 8 Between 8 and 9 <---
  56. College Algebra

    Consider only the discriminant, b2 - 4ac, to determine whether one real-number solution, two different real-number solutions, or two different imaginary-number solutions. 2x2 = -2 -5 Thank you
  57. math

    Need to make a problem, using parentheses and use as many operations to write an expression equal to to th target number. You can only use each number once in an expression. Numbers 6,7,12,14,20 Target number = 41
  58. Algebra

    Let a be the value of the function when n is 0. The number of the first row of differences is b, the first number of the next row is c, and so on. The formula for the nth number of the series is: a + bn + cn(n-1)/2! + dn(n-l)(n-2)/3! and so on. Find the
  59. Algebra

    Let a be the value of the function when n is 0. The number of the first row of differences is b, the first number of the next row is c, and so on. The formula for the nth number of the series is: a + bn + cn(n-1)/2! + dn(n-l)(n-2)/3! and so on. Find the
  60. math

    Mike's number is 2000 more than Jerry's which is 400 less than Barry's. Larry's number is 1500 more than Sam's, which is 443. Sam's number is 60 less than Barry's.
  61. math

    a perso increases the number of tosses of a fair coin the actual number of heads will get farther and farther away from the number of tosses divided by 2
  62. Algebra

    Let a be the value of the function when n is 0. The number of the first row of differences is b, the first number of the next row is c, and so on. The formula for the nth number of the series is: a + bn + cn(n-1)/2! + dn(n-l)(n-2)/3! and so on. Find the
  63. Math- urgent

    One more than 3 times a number is the same as 5 times the number, decreased by 15. Find the number. • Assign the variable • Write an equation • Solve equation
  64. math

    Deshawn has five base-ten blocks. She models a number that is less than 999. The number she models has a zero in tens place and a zero in the ones place. What number is she modeling?
  65. math

    can someone give me proof that a negative number times a negative number is a positive number I've always been told this in like seventh grade that it is but havne't been given any proof
  66. Math

    Karen is applying for the nursing school at the University of Davis. Before applying, she received a breakdown of the tuition and fees from the university. Tuition: $611 per semester plus $250 per class Books: $82 per class Nursing School Fee: $19 per
  67. English

    1. You should wear a swimming cap in the swimming pool. 2. You should wear a swimming cap at the swimming pool. (Which preposition should we use? Are both OK?) 3. What is your number? - My number is 22. 4. May I have your number? - My number is 22. 5. What
  68. math

    the ratio to the number of mystery books to the number of science fiction books is 4:3 the ratio of the number of science fiction books to the number of biographies is 4:5 if there are 48 science fiction books, find the total number of books using bar
  69. Algebraic inequalities

    There are three kinds of fruit in a basket:apples, oranges, and pears. The number of apples is 1 less than the number of oranges. The number of pears is 2 times the number of apples. There are 17 fruits in the basket. How many of each kind are there?
  70. algebra

    Suppose that Maria has 140 coins consisting of pennies, nickels, and dimes. The number of nickels she has is 9 less than twice the number of pennies; the number of dimes she has is 19 less than three times the number of pennies. How many coins of each kind
  71. Algebra

    wallet contains $290 in $5, $10, and $20 bills. The number of $5 bills exceeds the number of $10 bills by 4, and the number of $20 bills is 3 less than twice the number of $10 bills. How many bills of each type are there?
  72. Algebra

    A wallet contains $445 in $5, $10, and $20 bills. The number of $5 bills exceeds the number of $10 bills by 2, and the number of $20 bills is 3 less than twice the number of $10 bills. How many bills of each type are there?
  73. math

    complete the table that shows the length of the chain formed when rings are liked in a staright line 1)number of rings 1 length of chain 16mm 2)number of rings 2 length of chain 30m 3)number of rings 3 length of chain 44m 4)number of rings 6 length of
  74. math

    The equation y = -1777x+27153 can be used to predict the number y of gun deaths in the United States x years after 20000, that is, x=0 corresponds to 2000, x=3 corresponds to 2003, x=5 corrresponds to 2005 and so on. Predict the number of gun deaths in
  75. chemistry

    Criticize the following statements. 1. In an ionic compound, the number of cations is always equal to the number of anions. [Is it ok to say 'not always'?] 2. The molecular formula for strontium bromide is SrBr(sub 2) [what's wrong wih this?] 3. The mass
  76. computer science

    The owner of the super supermarket would like to have a program that computers the monthly gross pay of their employees as well as the employee's net pay. The input for this program is an employee ID number, hourly rate of pay, and number of regular and
  77. algebra

    1)Find a1 in a geometric series for which Sn=300,r=-3,and n=4 a.15 b.15/2 c.-15 d.1/15 answer=a 2)Find the sum of the infinite geometric series n=1 at the bottom of the sigma notation 20(-1/4)n-1 on the right side a.25 b.80/3 c.16 d.does not exist answer=c
  78. algebra

    1)Find a1 in a geometric series for which Sn=300,r=-3,and n=4 a.15 b.15/2 c.-15 d.1/15 answer=a 2)Find the sum of the infinite geometric series n=1 at the bottom of the sigma notation 20(-1/4)n-1 on the right side a.25 b.80/3 c.16 d.does not exist answer=c
  79. algebra

    1)Find a1 in a geometric series for which Sn=300,r=-3,and n=4 a.15 b.15/2 c.-15 d.1/15 answer=a 2)Find the sum of the infinite geometric series n=1 at the bottom of the sigma notation 20(-1/4)n-1 on the right side a.25 b.80/3 c.16 d.does not exist answer=c
  80. precalc

    Write a formula for converting a measure of degrees in degrees, minutes, and seconds to a decimal number of degrees. The formula should convert, for example, 39º 5’ 34” to 39.093º. The model includes the assumption that a full degree equals 60
  81. Need 8 grade math help quick please!

    I don't understand this. I don't get exactly what I'm supposed to do with the P(parenthes) thingy or how each question differs from the next. Theoretical and Experimental Probability: A number cube with the numbers 1 through 6 is rolled. Find the given
  82. Pre-algebra

    I can't figure out how to solve: Question #1: Two number cubes are rolled and a coin is tossed. Find the number of possible outcomes. Question #2: What is the probability of winning a lottery game where the winning number is made up of 6 digits from 0-9
  83. probability

    the digits 0 to 9 P(obtaining a prime number OR obtaining an odd number) P(obtaining a prime number OR obtaining a number divisible by 4) P(obtainig a number divisible by 4 or obtaining an odd number)
  84. math

    THE MAXIMUM NUMBER OF CUSTOMERS ARRIVING DURING RANDOMLY CHOSEN 10-MIN INTERVALS IS 5 AT A DRIVE-IN FACILITY SPECIALIZING IN PHOTO DEVELOPMENT AND FILM SALES. IT HAS BEEN FOUND THE NUMBER OF ACTUAL SALES MADE FOLLOWS THE PROBABILITY DISTRIBUTION IN TABLE
  85. Algebra

    which of these numbers can be classified as both real and irrational? 1. 5.858585858 2. 63.4 3. root 21 4. root 36 which is both a real number and an integer? 1. 23 2. 1/4 3. root 27 4. 3.402538 which of these number is classified as both real and
  86. math

    mary an jim have tickets to a concert. mary`s ticket number is one less than jim`s ticket number. the product of their numbers is 812. what are the two numbers? (x)(x-1) = 812 This is impossable, as an odd number added to an even number always yeilds an
  87. Chemistry

    These are what i used. 0.0375M sodium thiosulphate , 2.5% KI .47.2 ml copper sulphate solution. the average volume of Na2S2O3 is 19.25 cm, i have already calculated the number of moles of thiosulphate which is 7.218 * 10-4 moles of Na2S2O3 and also the
  88. Maths

    Please Could someone tell me what: 1. A square number is 2. A cube number is 3. A triangle number is Thank you Square numbers are the result of squaring an integer (IxI) Cube numbers are the result of the cube of an integer (IxIxI) A triangular number is a
  89. Java

    I am supposed to convert a program i already made into a Java console application that uses the Scanner class to read the user's input. This is the code i have that i need to convert. I don't know where to start. Here is the code import
  90. Math

    The ratio of the number of cats to the number of dogs in an animal shelter was 2:3. After 120 cats were adopted, the ratio of the number of cats to the number of dogs became 3:7. Find the total number of cats and dogs in the animal shelter in the end?
  91. Computer science

    If we have any five numbers. how do we find maximum and minimum number of those. You take the first number and store it in variable Min and Max. Then you take the second number. If that number is larger than the variable Max you overwrite Max and store
  92. Algebra

    Check My answers Please- 1. 3(y + 1) for y = 2 a.6 b.9*** c.7 d.8 2. d + g/h for d = 45, g = 18, and h = 9 a.6*** b.7 c.3 d.4 3.The cost in dollars of a class party is 59 + 13n, where n is the number of people attending. What is the cost for 44 people?
  93. math

    in an arithmetic sequence the common difference is equal to 2.the first term is also the first term of a geometric sequence. the sum of the first 3 terms of an arithmetic sequence and the sum of the first 9 terms of an arithmetic sequence form the 2nd and
  94. Math

    The larger of two numbers is 1 less than 3 times the smaller number. If twice the smaller number is increased by the larger number, the result is 18 more than the larger number.Find both numbers
  95. Chemistry

    If an element N has isotopic abundances X% of mass number 12, atomic number 6, and Y% of N of mass number 13, atomic number 6. If their relative isotopic mass is 12.35. Find X and Y.
  96. Chemistry

    How can i tell how many electrons an element has? like Carbon The atomic number is the number of protons in the nucleus AND the number of electrons. Carbon has an atomic number of 6; therefore, it has six electrons. Oxygen is 8; Ne is 10 etc.
  97. Chemistry

    If an element N has isotopic abundances X% of mass number 12, atomic number 6, and Y% of N of mass number 13, atomic number 6. If their relative isotopic mass is 12.35. Find X and Y.
  98. Geometry

    Use less than, equal to, or greater than to complete this statement: The sum of the measures of the exterior angles of a regular 9-gon, one at each vertex, is ____ the sum of the measures of the exterior angles of a regular 6-gon, one at each vertex. A.
  99. Science

    1. Consider a neutral atom that has 17 electrons A.) how many protons does it have b.) what is it's atomic number c.)which element is it 2. List the following for an atom with 33 protons and 42 neutrons a.) the name of the element b.) the atomic number
  100. math

    The difference of two numbers is 321. The larger number is 190 more than twice the smaller number. Which system of equations presents this information? (S = smaller number and L = larger number) I got: L-S=321(the difference) L=2S+190 What did i do wrong