What is the reciprocal of -3.21? I'm not sure but I think that this is what you have to do: -3 21/100= -321/100= -100/321 Answer: -100/321 Is this correct?

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  1. Math- Corrections

    What is the reciprocal of -3.21? I'm not sure but I think that this is what you have to do: -3 21/100= -321/100= -100/321 Answer: -100/321 Is this correct? If not, show me how to do it, and give me the correct answer. Thank you.
  2. Math

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  3. statistics

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  4. math help, correction

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  5. Math

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  6. English

    I have 100 dollars. I have 100 pounds. I have 100 pesos. I have 100 euros. I have 100 yen. I have 100 won. I have 100 yuan. (Are all correct? Don't we need to capitalize the first letter in each money name? What about the plural forms? Are all correct? Do we have to use '...
  7. Algebra

    An object which is dropped from 100 feet above ground falls according to the formula s = -16t^2 + 100, where s is the distance from ground level at time t. Which equation is equivalent to this formula? S-100 = t^2 ------- -16 S-100 = t^2 ------ 16 s - 100 = t^2 --- -16 or S-...
  8. Maths GRE

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  9. Statistics

    The table I have is: Color of Candy Frequency Proportion (as a fraction and decimal) Percentage Red 13 13/100 or .13 13% Orange 25 25/100 or .25 25% Yellow 8 8/100 or .08 8% Brown 8 8/100 or .08 8% Blue 27 27/100 or .27 27% Green 19 19/100 or .19 19% TOTALS 100 100/100 or 1 ...
  10. stats

    Express the following quantities to the correct number of significant figures: (a) 23.043 ± 4.321 (b) 67 ± 9.023 (c) 33.1492934 ± 2 Isn't (a) already the correct number of significant digits? Would (b) be 67.000 ± 9.023? Would (c) be 33.1492934 ± 2.0000000 or would (a) 23...
  11. math help please!!!

    In this question how do you know when to add or subtract?? Simplify 100^12/100^8 A.100^12/8 B.100^96 C.100^4 D.100^20 Is the answer C or D?? Thank you
  12. mathematics (percentages)

    math problem: pedro wants to calculate his gpa. he has the lab grades:90/100,98/100,90/100,94/100,90/100,90/100,95/100,98/100. Labs are worth 20%. He has the test grades: 9/10,6/10,10/10,10/10,5/10,7/10,7/10,7/10,10/10,10/10,8/10,10/10. Homework is worth 20% test grades are: ...
  13. Statistics Help Please

    The following data were collected on non-conformances for a period of 10 days. Day Sample Size Non-conformances 1 100 12 2 100 14 3 100 10 4 100 18 5 100 22 6 100 14 7 100 15 8 100 13 9 100 14 10 100 16 On what day is the proportion of non-conformances largest? smallest? What ...
  14. math

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  15. math

    please check my answers 1.Write each of the following as a common fraction or mixed number.4.0171=. 4 171/10,000 2.Arrange in order from smallest to largest.2.05,25/10 , 2.0513, 2.059,251/100 , 2.0515, 2.052, 2.051 3. 27.4  213.321  39.38 add=280.101 4.45.6  8.75subtract...
  16. math am i correct

    Add thirty-eight and nine tenths, five and fifty-eight hundredths, seven, and fifteen and eight tenths. 38 9/10 + 5 58/100 + 7 + 15 3890/100 + 558/100 + 7 + 15 4448/100 + 7 + 15 44 48/100 + 7 + 15 44 24/50 + 7 + 15 44 12/25 + 7 + 15 66 12/25
  17. Physics

    How many years would it take the planet to orbit the sun. How do you calculate. All I have is, that the planet is 97 times farther from sun than earth or 97 Astronomical units Using Kepler's Law you find that the anser is 97^(1.5) years. You can estimate this without using a ...
  18. Polynomials and properties of exponenets

    In the expression -7x-3x^2+5 what is the coefficient of x A.7 B.3 C.-3 D.-7 Suppose you earned 6t+2 dollars on monday and 9t - 6 dollars on tuesday what were your total earnings simplify your answer. A.15t-4 B.15t+8 C.-3t-4 D.-3t+8 100^12/100^8 A.100 ^12/8 B.100^96 C.100^4 D....
  19. Math Homework: Check Answers

    1. Suppose you earned 8t - 3 dollars on Monday and 6t + 5 dollars on Tuesday. What were you total earnings? Simplify your answer. A) 2t + 2 B) 2t - 8 C) 14t + 2 D) 14t - 8 Answer: A 2. f^2 • f^4 A) (2f)^8 B) (2f)^6 C) f^8 D) f^6 Answer: D 3. 100^12/100^8 A) 100^12/8 B) 100^...
  20. trig

    Is the answer to this problem correct? I'm not sure and I want to make sure I do well on the test. Evaluate the following logarithms given log 4/log a = .321 The answer my teacher gave me was 0.963. What is the reasoning behind the answer?
  21. 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 please help me
  22. math,correction

    simplify: sqrt ((7)/(100)) my work: 7 = 1sqrt (7) 100= 10 sqrt (1) (1)/(10) sqrt (7) my answer: (sqrt (7))/(10) Your answer is right but your statements: 7 = 1sqrt (7) 100= 10 sqrt (1) make no sense. how can sqrt(7)=7 ? you are saying 2.6457..=7 and 10sqrt(1) = 100 ---> 10 ...
  23. Math Help!

    Which proportion can be used to solve the following percent problem? What is 50% of 70? A. x/70=50/100 B. x/50=70/100 C. 50/70=x/100 D. 70/x=50/100 Is the answer B? Thank you
  24. Chemistry

    I am trying to figure out how much 1.134 grams worth of gold will cost, if gold is at 380 dollars an ounce. I set up proportions like this: 380 doll./1.34 grams (how many grams are in an ounce) = BLANK/1.134 grams (mass of coins). I got $321.58. But this is incredibly ...
  25. Chemistry

    Which of the following mixtures will result in the formation of a buffer solution if all solutions are 1.0 M before mixing? i) 100. mL of NH3(aq) and 100. mL of HCl(aq). ii) 100. mL of NH3(aq) and 50. mL of HCl(aq). iii) 100. mL of NH3(aq) and 50. mL NaOH(aq). iv) 100. mL of ...
  26. chemistry ugg!

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  27. derivative

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  28. math

    In this question do I add, subtract, or multiply the exponents? 100^12 ------ 100^8 A.100^96 B.100^4 C.100^20 Thank you
  29. Pre Algebra

    5. (m^2-m-3)+(m-4) A. m^2+m-1 B. m^2+2m-7 C. m^2-7 D. m^2-1 6. (4x^2-2x-1)-(-3x^3+2) A. -3x^3+4x^2-2x+1 B. -3x^3+4x^2-2x-3 C. 3x^3+4x^2-2x+1 D. 3x^3+4x^2-2x-3 9. 100^12/100^8 A. 100^12/8 B. 100^96 C. 100^4*** D. 100^20 16. (1.1*10^-5)(3*10^-2) A. 4.1*10^-7 B. 4.1*10^10 C. 3.3*...
  30. Pre-algebra

    Use a proportion to solve the problem. 34% of 83 x/100=34/83;40.96 x/100=34/83;2.822 x/83=34/100;28.22 x/83=34/100;56.44 I think it's either c or d because a and b arn't set up correctly according to how you're supposed to set up a porportion.
  31. physical science

    You have two cups, one containing 100 g of ice at 0oC, the other containing 100 g of water at 80oC. You pour the hot water into the cup containing the ice. What do you wind up with? A) 100 g of 0oC water and 100 g of 80oC water. B) 50 g of 0oC ice and 50g of 0oC water. C) 200 ...
  32. Science

    You have two cups, one containing 100 g of ice at 0oC, the other containing 100 g of water at 80oC. You pour the hot water into the cup containing the ice. What do you wind up with? A) 100 g of 0oC water and 100 g of 80oC water. B) 50 g of 0oC ice and 50g of 0oC water. C) 200 ...
  33. Pre-Algebra

    Can I have someone check this please? I wouldn't want to do the whole page, then find out I had done them all wrong. :( [Percents of Change] A $100 digital watch is now $72 Decrease, 72/100 = negative percent. 100/72.00 = .72 .72 - 1 = 30%? Thanks. 30% is my final answer, ...
  34. find my grade average

    -10% of my grade *82 -20% of my grade *100% *100% *100% *100% *100% *100% *100% *100% *82% -30% of my grade none -40% of my grade *76% reply as soon as possible. thank you!!!!
  35. Math

    A physician ordered 1 L of D-10-1/2 NS to infuse over 10 hours. How many grams of Dextrose would the patient receive per hour? I answer like this D10 = 10g/100 ml 1 L= 1000 mL 10 g/100 mL= x/ 1000 mL 100x= 1000x10 x= 10,000/100 x= 100 g over 10 hours 100g/10 hr = x/1 hr 10x= ...
  36. Physical Science

    I need help with this problem because it is confusing me. I tried to anwer it, though, so can someone please correct me if I am wrong? Suppose your mass is 45 kg and the mass of your little brother is 25 kg. You push your brother +100 N and an equal but opposite force of -100 ...
  37. Chemistry

    Calculate the change in pH when 5.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq). (I have several problems like this can some one work this through for me as a base line)?
  38. Math check

    write the decimal as a fraction or a mixed number in simplest form 2.67 2.67/1× 100/100 = 267/100 267/100 = 2 67/100?
  39. Physics

    On a mass of 100 kg, a force of 120 N acts right and at an angle of 30 degrees to the horizontal. If the coefficient of sliding friction is .1 what is the acceleration of the mass? 100N* cos30 -(100sin30+mg)(.1)= m*acceleration [86.6025- [(-50 + (100)(-9.8)](.1)]/100 [86.6025...
  40. Chemisrty

    Temp c KBr 20 65 40 80 60 90 80 100 100 110 At 100 C, 10.5 g KBr/10gH2O = 105 g/100 g (just multiply the top and the bottom by 10 to give you 100 g H2O) B) Since the solubility at 100C is actually 110, no, it isn't saturated (105 is less that 110). C) Yes, because the ...
  41. math

    what is 10% of 20% of 30% pf 100? 100 * .30 = 30 30 * .20 = 6 6 * .10 = .6 I hope that's what your looking for! Are these three separate questions? 10% = 0.10 x 100 = ?? 20% = 0.20 x 100 = ?? 30% = 0.30 x 100 = ?? Remember of means times. Or is it just one question? 0.10 x 0....
  42. 4th GRADE MATH

    WHAT IS 2/5 OF $50.00 AND WHAT IS 3/10 OF $50.00...IF YOU SHOW ME HOW TO GET ONE ANSWER, I CAN PROBABLY FIGURE OUT HE OTHER ONE. of means times. 2/5*50 = ?? That's (2/5)*50 = 100/5 = ?? Yes. Now, take 100 and divide it by 5. 100/5 = 100 divided by 5. What do you get from there...
  43. Chemistry

    I just need this checked over. I am not sure about the last part D. Temp c KBr 20 65 40 80 60 90 80 100 100 110 At 100 C, 10.5 g KBr/10gH2O = 105 g/100 g (just multiply the top and the bottom by 10 to give you 100 g H2O) B) Since the solubility at 100C is actually 110, no, it ...
  44. English

    Did I properly quote this sentence? Feldman is the author from my school textbook. I am not sure if I have this part right. Do I include the authors' name within the brackets() are do I leave out the author name and just put brackets around the year and page number?= Feldman...
  45. Chemistry

    Calculate the change in pH when 5.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq).
  46. Math "Need Help Asap"!

    7.)Which proportion can be used to solve the following percent problem? What is 50% of 70% A.)X/70 = 50/100 B.)X/50 = 70/100*** C.)50/70 = X/100 D.)70/X = 50/100 B?
  47. Finance

    Often in personal finance we want to know what our $1 investment today will be worth in 20 years. In business however, there is more concern with answering the question, “If I receive $100 in 5 years, what is that worth today?” To answer this question, modify the formula ...
  48. math

    Fill in the blanks y = 10x + 100 x y -20 ? -10 ? 0 ? 10 ? I don't see any blanks to fill in. Are they telling you values of y and asking you co compute x? Or vice versa? The spacing changed the format I had. the values for x are -20, -10, 0, 10 now I need to find the values ...
  49. 5th grade math (word problems)

    I'm not sure how to solve the following problem: If you divide 1/10 of a dollar into parts that are each 1/100 of a dollar, how many parts are there? What are they called? To solve, would part of the answer be that i would have 10 parts of 1/100 (because I divide 100 by 10 and...
  50. Physics

    5. If a wave has a wavelength of 20m and a speed of 100 m/s, what is the period of the oscillation? v = wavelength / period 100 = 20 / period 100*20 = periodperiod = 20 / 100 2000 s = period OR period = 20 / 100 period = 0.2 s I don't know which one is correct, please help?!
  51. algebra (check my work)

    60% of what number is 24? a/w = p/100 24/w = 60/100 24 * 100 = 60* w 2400 / 60 = 60w / 60 w = 40 am i correct?
  52. Math percentages

    Is this right?? 10 + 7 = 17/100 = 41.2 % 100 + 92 = 192/100 = 1.92 % 15 + 13 = 28/100 = 1.25 % 28 + 22 = 50/100 = .5%
  53. accounting

    A bond sinking fund investment is started on January 5, 2010, by transferring $10,000 in cash to the fund. This $10,000 is invested and earns $1,100 during 2010. The entry to record the earnings made on the sinking fund investment includes a debit to _____and a credit to ...
  54. Chemistry

    100 g piece of granite and a 100 g piece of lead are placed in an oven that is at 100°C. The initial temperature of the pieces are 25°C. After a couple of minutes, neither one is at 100°C, but which one is warmer? Which one will reach 100°C first? How much energy will it ...
  55. 6th grade math

    Hi.. i'm a little confused on using proprtion equations to solve percent problem. can you check the following? Is there a different way to solve? equation: is(part)/of(whatnumber)= %/100 1. What is 94% of 43? x/43 = 94/100 100x = 43*94 (cross multiply) 100x = 4042 x = 4042/100...
  56. Math

    My mom and I don't agree on the answer to this problem 10x10-5x10 I say 995 Mom says 50 Please help. 10x10-5x10 100-50 50 If you show me your work I can show you your error. I am not sure if x stands for the variable or multiplication. If multiplication your mother is correct...
  57. Physics

    What is the heat in Joules required to raise the temperature of 25 grams of water from 0 °C to 100 °C? What is the heat in calories? Knowing that 4.18 J = 1 calorie and C= 4.18 J/g·°C M=25g C=4.18 J/g Tf=100 Ti=0 Q=25g x4.18j/g (100-0) Q=25x4.18x(100) Q=104.5(100) Q=10,450
  58. math

    Write a function rule for finding the amount of daily pay, p in the following situation; A bus driver gets paid $100 each day plus $0.20 per kilometer, k. A.100=0.20 x k B. p=0.20x100 x k C. p= 0.20k+100 D. 0.20k=100+p Is the answer B??
  59. Math (Confused)

    A certain economy's consumption function is given by the equation C(x)=0.75x+5 where C(x) is the personal consumption expenditure in billions of dollars and x is the disposable personal income in billions of dollars. Find C(0), C(50), and C(100). a. C(0)=42.5, C(50)=5, C(100)=...
  60. Math

    Solve the equation: 4x^2 + 100 = 0 Here is my work: 4x^2 + 100 = 0 - 100 - 100 4x^2 =0 /4 /4 x = -5 or 5. Did I do this correctly?
  61. Stats

    Y is a discrete random variable. The table below reports the values of Y and the corresponding frequency, n (the number of observations for each value). Based on this information, what is the expected value of Y? Y n 50 50 70 100 100 200 200 50 120 100 140 100 150 100
  62. Maths GRE

    A salesman receives a commission of c% on a sale of D dollars. Find his commission. A)cD B)cD/100 C)100cD D)c/100D E)100c/D Any number expressed as a percentage is that number divided by 100 expressed as a decimal. Thus c% is c/100 Multiplying that by the sale price D gives: (...
  63. Math

    I need help in algebra 1. I have 4 questions, I already answered 3 of them, but I need help with the other Andrew measures the amount of a very unstable substance to be 100 moles. The half-life of this substance is 3 days (after 3 days, half is gone). 1. Write an exponential ...
  64. College Algebra

    A rectangular garden is 20 ft longer than it is wide. Its area is 8000 ft{}^2. What are its dimensions? w(w+20) = 8000 w^2+20w = 8000 w^2+20w-8000 = 0 (w-80)(w+100) = 0 w-80 = 0 w=80 or w+100 = 0 w = -100 I think that x=80 makes more sense. However what would the length be if ...
  65. Statistics

    What price do farmers get for their watermelon crops? In the third week of July, a random sample of 51 farming regions gave a sample mean of = $7.08 per 100 pounds of watermelon. Assume that is known to be $1.80 per 100 pounds. Find a 99% confidence interval for the population...
  66. prealgebra/ check answer please

    What single discount is equivalent to two successive discounts of 15% and 7%? x= 100 [1-(.85)(.93)] = 100 (1-.79) =100 (.21) =21%
  67. Math

    Select the inequality that models the problem. The length of a rectangle is four times its width. If the area of the rectangle is less than 100 square meters, what is the greatest width of the rectangle? 4w + w < 100 4 + 4w < 100 4w < 100 4w • w < 100
  68. Chemistry Check

    A thermocouple was calibrated to give Celsius temperature. In the ice bath the voltage reading was 0.250 V, and in boiling water at 736 Torr the reading was 1.20 V. Derive the conversion equation between Volts and temp. C. So if I'm working this right, it should go like this: ...
  69. Algebra

    The larger of two numbers is 5 less than twice the smaller number. The sum of four times the larger and twice the smaller number is 100. If x is the smaller number, which equation below determines the correct value of x? A) 2(2x + 5) + 4x = 100 B) 2(2x – 5) + 4x = 100 C) 4(...
  70. math please

    Add or subtract exponents? I don't know when to add or subtract it's all confusing. 100^12/100^8 A.100^12/100^8 B.100^96 C.100^4 D.100^20 If I added it would be D If I subtract it would be C Please help I don't know which one is right. Thank you
  71. mathematics (percentages)

    math problem: pedro wants to calculate his gpa. he has the lab grades:90/100,98/100,90/100,94/100,90/100,90/100,95/100,98/100. Labs are worth 20%. He has the test grades: 9/10,6/10,10/10,10/10,5/10,7/10,7/10,7/10,10/10,10/10,8/10,10/10. Homework is worth 20% test grades are: ...
  72. pre calculus

    Given: u <-1, 7> and v <4, -3> Find: (u • v)(u + v) ________________________________________ <25, 100> <-25, 100> <-75, -100> <75, -100>
  73. math

    I just want to check to make sure I am correct -- my equation is y = -x^2 + 90x - 800 If x = 100, -x^2 would be 10,000, not -10,000? Because -100 x -100 is 10,000, not -10,000 --- my calculator keeps giving me a negative number. So my overall number is 18,200
  74. math

    how to solve 1/100-2/100+3/100-4/100+....+99/100-1?? and this?? -1/100+2/100-3/100+4/100-....-99/100+1??
  75. math

    Marvin has a box containing apples and oranges. *There are a total of 100 apples and oranges in the box. *The number of apples in the box is 16 more than the number of oranges How many apples are in the same box? Answer: Its a system of equation so a+o=100 a=o+16 Distribute o+...
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  77. math

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  80. Chemistry

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  81. Chemistry

    In a 100g sample of water, determine the amount of weight that is attributed to Hydrogen and to Oxygen. i found the mass ratio which is 2:16 & then reduced its 1:8. then i set up my equation. 1x+8x=100g 9x=100g x=11.11111111 or 100/9 then i have to substitute. 1(100/9)= 11....
  82. math

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  83. Math

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  84. math

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  89. Math check

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  92. Nice unanswered question by Maggie

    "100 bushels of corn are divided among 100 men, women, and children. Men receive 3 bushels each, women 2 bushels and children 1/2 bushel each. How can the bushels be distributed? is there more than one solution? if so, find the other solutions." let the number of men be x the ...
  93. math

    Find the value of z that would be used to test the difference between the proportions, given the following. (Use G - H. Give your answer correct to two decimal places.) Sample n x G 386 327 H 414 321
  94. Statistics

    Find the value of z that would be used to test the difference between the proportions, given the following. (Use G - H. Give your answer correct to two decimal places.) Sample n x G 386 327 H 414 321
  95. Math

    Find the value of z that would be used to test the difference between the proportions, given the following. (Use G - H. Give your answer correct to two decimal places.) Sample n x G 386 327 H 414 321
  96. math

    Find the value of z that would be used to test the difference between the proportions, given the following. (Use G - H. Give your answer correct to two decimal places.) Sample n x G 386 327 H 414 321 .
  97. statisticsWere did i go wrong thank you

    Find the range and the standard deviation (correct to two decimal places). 83, 96, 100, 100, 106=divided by 5=97 I did the (83-97)+(96-97)+(100-97)+(100+97)=106-97)= I know I add than divide by 5 and I can not come up with Standard deviation. Where am I wrong.
  98. maths

    What is the value of 321 rounded up to the nearest 10?
  99. microeconomics

    Consider a competitive exchange economy with two agents(1&2)and two goods(X&Y). Agent 1's endowment of (X,Y) is (100,100)& agent 2's endowment of (X,Y) is (50,0).An allocation of agent i is denoted by (xi,yi)where xi is his allocation of X & yi is his allocation of Y.Agent1's ...
  100. Math riddle

    1. is 100 rounds to 100 and 99 rounds to 100. 2. 100 + 99 = 199 which est to be 200. 3. 100 - 99 = 1 Which est.to be 0 zero.
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