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Question 1178795: With the known value in the denominator,
the equation is 1.38/37.64 = .036.
Now set this up as an equation with
the denominator = x.
1.38/x = .036 and solve for x.
1.38 = .036x
x = 1.38/.036
x = 38.33
The answer should be x = 37.64
What am I doing wrong?
My email is billjaenicke@gmail.com
Thank you
Found 2 solutions by josgarithmetic, Edwin McCravy:
Answer by josgarithmetic(39624)   (Show Source):
You can put this solution on YOUR website! ---------------------------------
1.38/x = .036 and solve for x.
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If compute left side, using windows calculator, 0.03666312 versus 0.036,
the left being shown to eight decimal place accuracy. Not really an equality.
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Answer by Edwin McCravy(20060)  (Show Source):
You can put this solution on YOUR website!
It's because you rounded off the denominator .0366631243 too much.
When working with a calculator, you should keep all the decimal places
until the end, and only then do your rounding off.
1.38/37.64 is .0366631243 not .036, keep all the decimals your calculator
gives until the end. Only round off at the end. It should be:
1.38/x = .0366631243 and solve for x.
1.38 = .0366631243x
x = 1.38/.0366631243
x = 37.64000004, and only then round off to x = 37.64
[Also notice that even when you rounded .0366631243 off too soon, you
rounded it incorrectly. It should have been rounded as .037 not .036.
If you had used .037 instead of .036, the final answer would still have
been off, as 37.2982973, not 37.64, but that's closer to the correct answer.
Realize that any time you round off, you cause some error to occur. As a
rule, rounding off numbers that are going to be denominators causes bigger
errors than rounding off other numbers. So the best plan is to keep all the
decimal places till the end. Only round off the final answer.]
Edwin
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