Gamewizard Posted December 24, 2010 Share Posted December 24, 2010 Hi im finding it hard to calculate a formula. Can anyone please help me ? t=13.94-15.55/squareroot of 1.8410(1/14+1/15) the answer to this is -3.19 but i keep getting diffrent answers because im confused on how to work out the 1/14+1/15 bit. which step are you supposed to do first ? thanks Link to comment Share on other sites More sharing options...
cypress Posted December 24, 2010 Share Posted December 24, 2010 Gamewizard, I can only get -3.19 when I work the problem this way: t=(13.94-15.55)/((1.8410*(1/14+1/15))^0.5) You have to work from the inside of the parentheses outward. Using standard math order convention exponents go first then multiplication and division and then addition and subtraction so this format works also: t=(13.94-15.55)/(1.8410*(1/14+1/15))^0.5 but the way you wrote it you would get -16.90. Since the 1/14+1/15 are in parentheses you work that first in either case. Link to comment Share on other sites More sharing options...
Gamewizard Posted December 25, 2010 Author Share Posted December 25, 2010 (edited) Gamewizard, I can only get -3.19 when I work the problem this way: t=(13.94-15.55)/((1.8410*(1/14+1/15))^0.5) You have to work from the inside of the parentheses outward. Using standard math order convention exponents go first then multiplication and division and then addition and subtraction so this format works also: t=(13.94-15.55)/(1.8410*(1/14+1/15))^0.5 but the way you wrote it you would get -16.90. Since the 1/14+1/15 are in parentheses you work that first in either case. Oh yes i get it now, thats what I wasnt sure about. Thanks cypress Just another thing, what does the ^0.5 signify ? is it the square root ? Edited December 25, 2010 by Gamewizard Link to comment Share on other sites More sharing options...
cypress Posted December 25, 2010 Share Posted December 25, 2010 Oh yes i get it now, thats what I wasnt sure about. Thanks cypress Just another thing, what does the ^0.5 signify ? is it the square root ? Glad I could help. Yes it is the square root. ^ is shorthand for exponent and the formula is raised to the 1/2 or 0.5 power. It can be shown that if ^2 is squaring a number then the number raised to the reciprocal or 1/2 is the square root. Link to comment Share on other sites More sharing options...
Gamewizard Posted December 28, 2010 Author Share Posted December 28, 2010 Glad I could help. Yes it is the square root. ^ is shorthand for exponent and the formula is raised to the 1/2 or 0.5 power. It can be shown that if ^2 is squaring a number then the number raised to the reciprocal or 1/2 is the square root. oh ok cool thanks again Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now