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When entering the problem3.4983x 10-5 / 4.1546 x 10-3 i keep getting a number to the wrong power of ten for the answer. It should be to the negative third power and I get the negative 8th or 9th
Are you using the (-) key and not the - key to enter the negative exponents?Are you using the (-) key and not the - key to enter the negative exponents?
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Were you also clearing the financial memory with 2nd [CLR TVM], or just the storage memory? If you don't, it's going to keep using whatever value you last used for PMT.
The sine of 0.5 radians is about 0.4794, so your calculator seems to be giving you the correct answer in that case.
The sine of 0.5 degrees is about 0.00872, which your calculator may be displaying as something line 8.72 times ten to the negative 3. Look to the far right end of the number: do you see "x10-3" with the "-3" superscripted? In that case, again your calculator is giving you the correct answer.
The E means "times ten to". The calculator is giving you an answer of 4.398046511 times ten to the twelfth power, or 4,398,046,511,000. This is a thirteen digit number, while the calculator can only show ten digits, so the last three digits are merely placeholders. To get an actual number, you'll have to do multiprecision arithmetic. There are programs available for that purpose at http://www.ticalc.org .
If you're pressing the keys
(-) 1 0 5 ^ 2 ENTER then you're not squaring a negative number, you're negating a square. This sequence of keystrokes calculates -(105^2), and -11025 is the correct answer for this.
Since the ^ operator binds more tightly than the (-) operator, you need to tell the calculator you want to override the order of operations, just as you would if you wanted an addition done before a multiplication. Press ( (-) 1 0 5 ) ^ 2 ENTER and you will see the expected result.
To enter an exponent, positive or negative, use the EE (Enter Exponent) key (the shifted function of the , key just above the 7 key). Do 5 2ND [EE] (-) 1 0 / 5 2ND [EE] (-) 1 0 ENTER and you'll see 1.
What I think you're doing (I can't be sure without seeing your keystrokes) is calculating 5*10^-10/5*10^-10 which is interpreted as (5*10^-10/5)*10^-10, which indeed is 10^-20.
Enclose any negative number between parentheses before squaring. If you enter -4^2, where - is the negation, the result will be -16 because of the priority rules: exponentiation (power) has priority over negation. If you enter (-4)^2 the result will be 16, because parentheses have priority over the squaring: the 4 is negated then the result is squared.
Hello, What you are calculating is -1 times 5^2 which is -1*25=-25. If you want to calculate the square of -5 you enclose it between parentheses.
Reason
There are two operations: the power and the negation and the power has priority. Thus 5^2 is calculated first, then its negative is taken. If you put it inside parentheses, the () has priority. The negative of 5 is taken first, then the result is squared giving 25.
Hello, I dont think you got a lemon. You acn always enter the powers of 10 as 10, [y^x], but is is less efficient than the EE key This EE representation is a shortcut. If you want 10 to the 5th power you just enter [2nd] [EE] 5 and the calculator displays 100000. Of course if you need any other number multiplying the power of ten you enter the following e.g. 2.677[x][2nd][EE]5.
You will not get any error with a positive exponent. But if your exponent is negative you should use the change signe key to the left of ENTER and symbolized by (-)
To avoid all errors I would use parentheses to enclose my exponent.
Here is how to explain the seemingly erroneous result
10 [EE] 5 ) (-) is interpreted by your calculator as 10x(10^(-5)) which evaluates correctly to 0.0001 because [EE] by itself stands for 10^ .
Hope it clarifies this point for you.
By the way some new calculators (Casio) don't have this EE key. Instead you find a key labeled x10^X .
Are you using the (-) key and not the - key to enter the negative exponents?
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