# How to calculate 1+2+3+...+99+100 without a calculator?

46,339 results
1. ## CHEMISTRY

a) Calculate the change in pH when 4.00 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). b) Calculate the change in pH when 4.00 mL of 0.100 M NaOH(aq) is added to the original buffer

2. ## chemistry

Calculate the change in pH when 9.00 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). Calculate the change in pH when 9.00 mL of 0.100 M NaOH(aq) is added to the original buffer solution.

3. ## Logs

Approximate e^-0.6 to 3 decimal places. I am not sure how to approach this without a calculator. I don't think we are allowed to use a calculator but I'm not 100% sure on that either.

4. ## Math

Tony spent \$60.54 and bought 3 packs of notebooks and a calculator. How much does a pack of notrbooks cost if a calculator costs \$45.87

5. ## chemistry

Calculate the H3O+ concentration present in water under the following conditions. Enter your answer in scientific notation. a. [OH-] = 2.8 x 10-7 M b. [OH-] = 8.8 x 10-3 M c. [OH-] = 2.4 x 10-11 M everytime I do the problem In the calculator I get system

6. ## College Algebra

A calculator company produces a scientific calculator and a graphing calculator. Long-term projections indicate an expected demand of at least 100 scientific and 80 graphing calculators each day. Because of limitations on production capacity, no more than

7. ## Math

the width of a calculator can be represented by (3x+1) inches. the length of the calculator is twice the width. write a polynomial that represents the area of the calculator.

8. ## Physics

A golf ball is hit with an initial velocity of 15 meters per second at an angle of 35 degrees above the horizontal. What is the vertical component of the golf ball's initial velocity? a)8.6 m/s b)9.8 m/s c)12 m/s d)15 m/s I know you use 15cos 35 feta to

9. ## math

belinda used her calculator to find the decimal for the fraction 21/28.When she entered 21/28, the calculator gave an answer that looked familiar. Why do you think she recognized it?

10. ## Algebra

A school planned to buy x calculators for a total cost of Ksh 16200. The supplier agreed to offer a discount of Ksh 60 per calculator. The school was the able to get three extra calculators for the same amount of money. (a) Write an expression in terms of

11. ## Calculus

Find y' at x=2 by using TI calculator or Desmos.com 1. y=logx+x^2+x I don’t understand how to enter this into a calculator or this website can someone please explain

12. ## Math help

The price of a calculator is \$12.50. The sales tax is 7.5%. How much will you pay for the calculator? a. \$13.40 b. \$13.44 * c. \$13.57 d. 13.61 Thank you.

13. ## Math

for my stats exam, we are NOT allowed to use a scientific or graphing cal, my professor will give us those cheap calculator from the 99cent store. I wanted to know how can i calculate e^-4.7? on my scientific it says it0.009095 but on my cheap calculator..

14. ## Statistic

the life span of a calculator manufactured by the intel corporation has a normal distribution with a mean of 54 months and a standard deviation of 8 months. The company gurantees that any calculator that start malfunctioning within 36 months of the

15. ## MATH

How can you calculate the square root of 1.8E-5 without a calculator

16. ## MATH DECIMALS

45.6 - 72.3 = I USED CALCULATOR GOT 26.70 PUT THATS USING CALCULATOR WHY IS THAT TRUE? 45.6 - 73.3 HOW CAN YOU SUBTRACT THIS? I DON'T UNDERSTAND

17. ## Math

How to calculate 1+2+3+...+99+100 without a calculator?

18. ## Statistics

Given IQ~N(100, 256) find P(IQ > 115). Be certain to set your calculator to FLOAT 4 to match my answer exactly. I need to know how to figure this out on my calculator.... no one has taught me how to use my calc and I am so confused.... someone please help!

19. ## chemistry

Calculate the hydronium ion consentration and the hydroxide concentration in blood in which the PH is 7.3. Hydronium = [H3O+] = 10-pH or [H3O+] = antilog (- pH) and I got 1.00 x 10^7.3 for both concentrations is this correct? ABsolutely silly. You did not

20. ## Mathematics

Year Annual CPI Actual Price of a Calculator 1995 152.400 \$8.99 2000 172.200 \$10.49 2005 195.300 \$12.10 2010 218.056 \$12.75 2015 237.017 \$13.89 Based on inflation from the year 1995, calculate the expected price of a calculator for 2005. 4 points Based on

21. ## algebra

how do you find the square root of any number with long division and not a calculator? I don't like calculator readings. They are not always easy to figure out, plus math principles can't be learned with a calculator.

22. ## Mathematics concepts

Matthew sits at his desk unable to figure out the answer to a division problem. He reaches into his desk and pulls out a calculator. What is the correct response for Matthew's teacher to have? A. "Put that calculator away, you can't cheat on your work." B.

23. ## statistics

A professional basketball player has embarked on a program to study his ability to shoot foul shots. On each day in which a game is not scheduled, he intends to shoot 100 foul shots. He maintains records over a period of 40 days of practice, with the

24. ## math,conversition

how do i convert -2.25 into a fraction? OK, if dis is a calculator question, den all u gotta do is follow the steps... 1. Type into calculator -2.25 and press the equals button. 2. Press the Shift button 3. Press the button dat has ab/c And dis should giv

25. ## 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

26. ## Chemistry

this makes absolutley no sense I plug all this into my calculator but I get different results. The hydronium ion concentration can be found from the pH by the reverse of the mathematical operation employed to find the pH. [H3O+] = 10-pH or [H3O+] = antilog

27. ## Algebra

My calculator is broken. The "+" key works correctly,but whenever I try to compute a-b, the calculator performs b-a instead. What answer does mny calculator compute for the expression ((7-10)+3)-5? Thank you!

28. ## Math

A student takes a true-false test exam with 10 questions. If the student guesses all ten questions, find the probability he gets 7 or 8 right. p(x=7) + p(x=8) (.5)^7(.5)^3 + (.5)^8(.5)^2 I have the correct answers which are .117+.044= .161 But when I

29. ## Chemistry

1)A buffer solution that is 0.10 M sodium acetate and 0.20 M acetic acid is prepared. Calculate the initial pH of this solution. The Ka for CH3COOH is 1.8 x 10-5 M. As usual, report pH to 2 decimal places. *A buffered solution resists a change in pH.*

30. ## Chemistry

1)A buffer solution that is 0.10 M sodium acetate and 0.20 M acetic acid is prepared. Calculate the initial pH of this solution. The Ka for CH3COOH is 1.8 x 10-5 M. As usual, report pH to 2 decimal places. *A buffered solution resists a change in pH.*

31. ## Statistics

The life span of a calculator manufactured by the Intel Corporation has a normal distribution with a mean of 54 months and a standard deviation of 8 months. The company guarantees that any calculator that starts malfunctioning within 36 months of the

32. ## ti-83 unit conversion

How do I do unit conversion using graphing calculator? For example, if you have to convert 4 miles into yards, and you don't know 1760mi=1 yd. Is there any way to do this in calculator? Thanks.

33. ## Bus. Math

Assuming monthly payment was 804.45 on a 50,000 loan of 9% compound interest for 7 years. How would I calculate what the unpaid balance is and the end of 12 months? Then again a the end of 72 months? Am I on the right track: PV .0075 over 1 - (1 + i)-n How

34. ## Algebra

I am using a TI-83 calculator to find all the solutions to the quadratic equation (5x(Squared) - 80 = 0)by graphing. The answer is supposed to be (-4 and 4) but the calculator comes up with (ERR: NO SIGN CHNG). Can you tell me what I'm doing wrong?

35. ## math help, correction

Anna has 12 bills in her wallet, some \$5 and some \$10. The total value of the bills is \$100. HOw many of each bill odes Anna have? How do i solve these type of problems my quess was this but i don't know if i'm correct. 5(x) + 10(y) = 100 5(0) + 10y = 100

36. ## 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

37. ## Physics

Jo student undertakes a unique experiment with his calculator. He goes to the school roof that is 18.0 m above the ground. He throws the poor calculator upward with a velocity of 42 m/s. Assume that the calculator goes straight up and just misses the roof

38. ## Math finance

I just brought a finanical calculator and i don't really know how to use it yet. The textbook said to calculate the price of the bond: Price=Coupon x Annuity factor (r, T)+ Par Value x PV factor (r, T) I was just wondering how to punch in the annuity

39. ## math

how do you find 30% of 500 without calculator? also how would you find 0.5% of 3200 without calculator? is there a formula? i don't know where to start. i know 30/100 would be 3/10 and 0.5 is 1/2

40. ## math

how do you find 30% of 500 without calculator? also how would you find 0.5% of 3200 without calculator? is there a formula? i don't know where to start. i know 30/100 would be 3/10 and 0.5 is 1/2

41. ## algebra I

for my homework I have to graph 4 equations: 1. y=1/4x^2+3x-3 2. y=-x^2+7x-2 3. y

42. ## math

Suppose that the multiplication and division keys on your calculator were broken. Explain how you can calculate 452 x14 by using other keys on the calculator.

43. ## Algebra

Price of a calculator. Kayla paid \$137.80, including 6% tax, for her graphing calculator. How much did the calculator itself cost?

44. ## math concepts

Matthew sits at his desk unable to figure out the answer to a division problem. He reaches into his desk and pulls out a calculator. What is the correct response for Matthew's teacher to have? A. "Put that calculator away, you can't cheat on your work." B.

45. ## math

I am working on a problem about bacteria growing and I used my calculator to find the exponential equation to be y = 10006.06771(1.2297)^x First it asked how many bacteria would there be after 6 hours which was easy because I just plugged in 6 for x and

46. ## Math

A school planned to buy x calculators for a total cost of Ksh 16200. The supplier agreed to offer a discount of Ksh 60 per calculator. The school was the able to get three extra calculators for the same amount of money. (a) Write an expression in terms of

47. ## math

I am learning about lines of best fit and how to do them on my calculator. I found the correct equation and now I need to find predicted values for x. I have all my x values and I have my equation. Do I need to do each of these manually on my calculator,

48. ## 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

49. ## Math

Hi,I need to know how to do question like this without using a calculator. Can anyone help please. Which of the following is closest to square root of 4000 A)40 B) 60 C) 200 D) 2000 I know the answer is B , but I did it on the calculator. Can someone show

50. ## Physics

(a) calculate the energy in joules put out by a 9.0 V calculator battery that moves 3.0 C of charge through a handheld calculator after 1 hr of operation. (b) calculate the energy put out by a 12.0 V car battery that moves 1000 C of charge (as it may when

51. ## 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

52. ## pre-algebra

0.85 m=____cm 1 meter (m) = 100 centimeters (cm) You're going from the larger measurement to the smaller measurement, in a way. So which way will you move the decimal? Or ... what will you do: multiply or divide by 100?

53. ## Math

How can you add 0 - 100 without using a calculator or going 1+2+3+4 and on?

54. ## Trigonometry college

Use a calculator to solve csc (theta) = -3. I know the answer is 3.48 and 5.94 but I need the steps to take on the calculator to arrive at the answer. I have a ti-84 calculator. thanks!

55. ## 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)?

56. ## Chemistry

Calculate the change in pH when 9.00 mL of 0.100 M NaOH(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).

57. ## 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).

58. ## Calculus

In increasing order, rank: 3^ln 2, 2^3, 2^ln 3 *do not use a calculator, and explain your choices Obviously, 2^3=8 So, instinctively, I entered the other values into my calculator just to rank the quantities using decimal places. However, in my calculator,

59. ## College Algebra

A calculator company produces a scientific calculator and a graphing calculator. Long-term projections indicate an expected demand of at least 100 scientific and 80 graphing calculators each day. Because of limitations on production capacity, no more than

60. ## College Algebra

A calculator company produces a scientific calculator and a graphing calculator. Long-term projections indicate an expected demand of at least 100 scientific and 80 graphing calculators each day. Because of limitations on production capacity, no more than

61. ## Algebra 1

The everton college store paid \$1668 for an order of 44 calculators. The store paid \$18 for each scientific calculator. The all graphic calculator cost \$55. How many of each type of calculator was ordered?. Here is a challenging one. I appreciate you help.

62. ## math

what is 100 x 200 x 300= can't find a calculator

63. ## chemistry

Calculate the change in pH when 6.00 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). Calculate the change in pH when 6.00 mL of 0.100 M NaOH(aq) is added to the original buffer solution.

64. ## chemistry

Calculate the change in pH when 6.00 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). Calculate the change in pH when 6.00 mL of 0.100 M NaOH(aq) is added to the original buffer solution.

65. ## Math

Can someone please help. How log will it take you to save \$100,000 if you start saving 1597 every 3 months starting today? Assume and interest rate of 6% compounded quarterly. Business Calculator py/cy= 4 I=6% fv= 100,000 1597= PMT BGN is on

66. ## Physics

Beatrice throws the 1st calculator straight up from the edge of the roof of a building. She drops a 2nd calculator off the side of the building 2 seconds after she has thrown the first one. If the height of the building is 40m, what must the initial

67. ## Math

Find the following product. (.11111)(12)(9)(.44444)(235) I don't undrstand the difficulty here. Take the statement: (.11111)(12)(9)(.44444)(235) put a * between each term like this (.11111)*(12)*(9)*(.44444)*(235) Now put this into the Google search window

68. ## Math

Landri slides a calculator across The 0.91m tall lab table but Sarah misses the catch. The calculator slides off the table and lands on their target on the floor which they had placed 1.03m from the base of the table. How fast was the calculator moving

69. ## Calculator Help

Is there a difference between TI-89 Titanium calculator and TI-83 calculator? Because I'm taking a final exam and my teacher will only allow us to use a TI-83 calculator and I've never used it... like for putting in the parentheses with the log when

70. ## chemistry

Calculate the change in pH when 4.00 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). Delta pH=? Calculate the change in pH when 4.00 mL of 0.100 M NaOH(aq) is added to the original buffer

71. ## Math

Given: sin37 = 6/10 use identities and calculate the following without using a calculator

72. ## math!!

what is 73.44 divided by 3.6?? punch it in a calculator yeah exactly use a calculator!! the answer is 20.4 Just in case the calculator is not available, it might be better if you learn how to do long division without a calculator. You will feel more

1.evaluate without using a calculator 2logx+1=log900 2.solve the following equation A. 3log(x-2)=4.714 B. 16^x-3 = 8^2x+1 C.10^2x=1/100

74. ## chemistry help

this isnt exactly a chemistry question, but i am doing chemistry homework with my calculator. and i want to know if someone can tell me how can i cube something with this calculator? TI-30X IIS? i wanted to post a pic but i cant post sites. i have this

75. ## calculus

Let q(x)=(x^4)(e^-x). Calculate q'(x). Use q'(x) to determine whether q(5)q(6) (do not use a calculator). Explain your reasoning.

76. ## calculus

Let q(x)=(x^4)(e^-x). Calculate q'(x). Use q'(x) to determine whether q(5)q(6) (do not use a calculator). Explain your reasoning.

77. ## math

I am not sure how to calculate this on the calculator: 1225000 = (1 - 6.53%) * amount raised

78. ## Finance

How do you calculate the yield to maturity without a financial calculator?

79. ## exponents

i know this is simple but what is the answer to the -3 squared? -3 squared is 9. Check this site for more information. http://www.gomath.com/algebra/negative.php Well then I do not know how to use my calculator. Every time I put in -3 to the second power

80. ## Calculus

Use your calculator to approximate the integral using the method indicated, with n=100. Round your answer to four decimal places. sqrt(x+4)^dx between 4 and 0.

81. ## math

A school planned to buy x calculators for a total cost \$216. Supplies agreed to offer a discount \$.80 per calculator. the school was then able to get three extra calculators for the same amount of money. (a) orginal price of each calculator; (b) price of

82. ## math percents

How do I solve this problem without calculator? I keep coming up with 270 but the calculator says 275 Thirty-three is 12% of what number?

83. ## Math

16 ÷ 4 • 2 = My answer is 2 but my calculator says 8. (Yes I am aloud to use a calculator) IDK what it is, because if I use order of operations shouldn't it equal 2?

84. ## Math

How do graph the parent quadratic function on calculator? I need some assistance so I can start my Hw. I have a TI-83 pus calculator

85. ## math

How do I find out on a standard calculator what this is: A=1/2 (4 3 )(48) It's supposed to read 4 square root 3 I don't even know how to input this into my calculator. Can someone tell me how? thanks!

86. ## Math - Solving Graphically

1. 8 + 7x =2x² I used my calculator to graph this and got x is about 4.41 and -.904 2. 1/3x² - 15 = 0 Again, I graphed on my calculator and got x is about 6.70 and -6.70 Are these answers accurate and is there another way to solve?

87. ## Math

I have a TI-83 Plus calculator and was wanting to plot some data from my homework, but when I want to insert the x and y on my calculator, I only have an X column and no Y column. How can I add that column in order for me to plot my data? I'm looking at my

88. ## tan x = 1/2

Can someone tell me what the radian value is for this number and how they got it? Thanks On a graph plot the point A(2,1) Let C(2,0) be the point on the x-axis x is the angle AOB and tan x = 1/2 Since angle x is not one of the special angles, you will have

89. ## Math

Use a calculator to simplify the expression. 8/2^3-2+4.1*2 When I used the calculator, I got 22.2 So then I used "PEMDAS" but got 7.53333... But the answer is 7.2 can someone help please?

90. ## Chemistry

Calculate the pH after 0.011 mol NaOH is added to 1.00 L of each of the four solutions. a) 0.100 M propanoic acid (HC3H5O2, Ka= 1.3 10-5) b) 0.100 M sodium propanoate (NaC3H5O2) c)pure H2O d) 0.100 M HC3H5O2 and 0.100 M NaC3H5O2

91. ## math

belinda used her calculator to find the decimal for the fraction 21/28. When she entered 21/28, the calculator gave her an answer that looked familiar. Why do you think she recognized it?

92. ## Physics

You are very slowly pushing up an incline with a calculator sitting on it. The coefficient of static friction is 0.7. At what angle θ will the calculator start sliding?

93. ## Math

Belinda used her calculator to find the decimal for the fraction 21/28, When she entered 21/28 the calculator gave an answer that looked familiar. Why do you think she recognized it.

94. ## Physics

You are very slowly pushing up an incline with a calculator sitting on it. The coefficient of static friction is 0.7. At what angle θ will the calculator start sliding?

95. ## Physics

You are very slowly pushing up an incline with a calculator sitting on it. The coefficient of static friction is 0.7. At what angle θ will the calculator start sliding?

96. ## another problem

what is the square root of 3.467 x 10^8? I relaly do not know how to punch this into my calculator because I do not have a graphing calculator You don't need a graphing calculator. Punch in 3.467E8 and hit the square root button. The answer is 1.862E4

97. ## Maths

I have already asked this question but I have to use my calculator to solve x^2 + 8x + 5 = 0 Someone gave me a link to a quadratic formula solver but when I enter it into my calculator I nvever get the right answer.

98. ## algebra

I have one more step in my question. I have to Find the value of 10^-2.4 by putting this value in a calculator. I do not have a calculator to do this, can anyone help me out?

99. ## Math

The price of a calculator is \$12.50. The sales tax is 7.5%. How much will you pay for the calculator?

100. ## Math

Bond Yields. An AT&T bond has 10 years until maturity, a coupon rate of 8 percent, and sells for \$1,100. a. What is the current yield on the bond? b. What is the yield to maturity? a) The current yield is \$80/1100 = 7.27% b) The yield to maturity (YTM) is