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Dr. Math is basically a mathematics database. If you have a math question that you are stuck on, browse or search the database. Still stuck? Try to "write to Dr. math." Your math question will be seen by the members of The Math Forum. Because of all the emails they get each day, your question may or may not be answered.
Dr. Math is one of several places online that helps students with math questions.
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What are all of the combination of a 3 dice roll?
The ans is 56. http://www.quadibloc.com/other/bo0201.htm http://mathforum.org/library/drmath/view/56115.html
Why do you multiply the sum of the squared rank differences by 6 in the Spearman's Rank Correlation formula?
Try this link: http://mathforum.org/library/drmath/view/52774.html - its quite a complicated explanation!
How can you proove that root 3 and root 5 are irrational?
See http://mathforum.org/library/drmath/view/52619.html for a proof of the irrationality of sqrt(3). The proof that sqrt(5) is irrational is identical (substituting 5 for 3 in the proof).
Can you find the sides of a triangle given one side of 117 feet and one angle of 90 degrees?
Unfortunately, no. You need three pieces of data to define a triangle, three sides, two sides and the angle between them, or two angles and the side between them. http://mathforum.org/library/drmath/view/62849.html
How do you you measure angles?
With a protractor. A protactor looks like a semi circle. At the bottom of the the protractor there will be another semi circle but much smaller with a dot in the middle. To learn how to use a protractor or how to measure a circle go to this website http://mathforum.org/library/drmath/view/57664.html It will tell you almost everything on how to measure angles.
What is the history of exponents?
Oh, dude, exponents have been around for ages, like way before you and I were even a twinkle in someone's eye. They're basically just a shorthand way of writing repeated multiplication, like instead of saying 2 x 2 x 2 x 2, you can just write 2^4. It's like math's way of saying, "I'm too lazy to write this out every time."
How does a digital compass works?
here is the answer: http://mathforum.org/library/drmath/view/61130.html
How does digital compass work?
here is the answer: http://mathforum.org/library/drmath/view/61130.html
Is it possible to divide a hexagon into eight equal parts?
yes , u can : check this : http://mathforum.org/library/drmath/view/57803.html
What are some civil engineering math equations?
have a look at this excellent answer in ask dr math. http://mathforum.org/library/drmath/view/56461.html
What are all of the combination of a 3 dice roll?
The ans is 56. http://www.quadibloc.com/other/bo0201.htm http://mathforum.org/library/drmath/view/56115.html
How do you find the area of irregular shaped objects?
go to http://mathforum.org/library/drmath/sets/select/dm_area_irreg.html that will most likely answer your question or have a look at www.sketch n calc.com they have an online calculator
Why do you multiply the sum of the squared rank differences by 6 in the Spearman's Rank Correlation formula?
Try this link: http://mathforum.org/library/drmath/view/52774.html - its quite a complicated explanation!
How can you proove that root 3 and root 5 are irrational?
See http://mathforum.org/library/drmath/view/52619.html for a proof of the irrationality of sqrt(3). The proof that sqrt(5) is irrational is identical (substituting 5 for 3 in the proof).
How do you submit a question to DrMath an online resource?
First you click on the Dr. Math web site and then first see if they dont already have the answer if not then go look at the place dat u need n den type in den click sumbit and ur done n wait till it gets answered
Can you find the sides of a triangle given one side of 117 feet and one angle of 90 degrees?
Unfortunately, no. You need three pieces of data to define a triangle, three sides, two sides and the angle between them, or two angles and the side between them. http://mathforum.org/library/drmath/view/62849.html
Is a negative number squared a positive or negative?
Well, that depends.... According to mathforum.org http://mathforum.org/library/drmath/view/55709.html -- "If you ever see the expression -3^2 evaluated as 9, that's incorrect. The exponentiation is always done before the negation unless there are parentheses there to indicate otherwise. The bottom line is that -a^b is always evaluated as: -(a^b)."-- In other words: -3^2 = -9 (negative), while (-3)^2 = 9 (positive)
