275 and 250 = 275 + 250 = 525 exactly.
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The exact value is an irrational number, and can't be written on paper with digits.0.34202 is less than 0.000042 percent wrong.Cos(70 deg) is an irrational number and it is impossible to give its exact value.
NO such thing as 250% . 100% is totality!!!! However, 250 = 100 x 2.5 So multiply 1250 x 2.5 = 3125 The Answer!!!! NB It is a common mistake to say/write a percentage value greater than 100% . 100% is totality!!!!! What is meant is a value is multiplied by the increase.
Exact value means you do not approximate. So if you answer has a radical in it, you leave the radical and do not approximate it. If it has a fraction such as 1/3, you leave it and do not approximate it as .3 or .33 or even.333333333333333...
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1/squareroot2 ummm, yes, but be aware that square root 2 is an irrational number that has *no* exact value. So your question cannot be answered in the terms you asked it. You can use a calculator to get as much precision as you want, but never an *exact* answer.