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# (7*10^17)(8*10^-28) How do you simplify this expression and then answer it in scientific notation?

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Multiply 7 by 8 to get 56. Add the exponents 17 and -28 to get -11. The result is 56 * 10^(-11). Adjust the decimal point left one place to get 5.6 * 10^(-10).

Posted on Feb 14, 2014

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## Related Questions:

### My calculator will give me an answer in scientific notation. How do I change it to decimal form?

To switch out of scientific notation, press SHIFT MODE then select Fix or Norm.

Be aware that the calculator will switch to scientific notation anyway if the magnitude of the answer is too large or too small.

Aug 24, 2014 | Casio FX-115ES Scientific Calculator

### (7*10^17)(8*10^-28)

(7*8)*10^(17-28)=56*10^(-11)=5.6*10^(-10)=5.6EE-10

Feb 14, 2014 | SoftMath Algebrator - Algebra Homework...

### Scientific notation

All calculator use scientific notation if the result is too small or too large. Some, like the Casio FX9750G II, offer you two Normal displays, Norm1 and Norm2 that have different limits when numbers are converted to scientific notations.
Here is how to set one or the other.
In Run>Mat press SHIFT MODE (Setup). Scroll down or up to reach the display line. Press F3 to select Norm1 or Norm2.

Oct 22, 2013 | Casio FX9750GII Graphic Calculator

### I need to know how to divide, mutiply, add, and substract in scienctific notation on my Casio fx-300ES

The "problem" is not how to calculate with numbers expressed in Scientific Notation but how to enter a number given to you in scientific notation. Once the number is entered you do not have to do anything special. If you have to multiply it use the (x) button. to add it use the + button, etc.

How to enter a number in scientific notation.

Type in the mantissa (example 6.022)
Press the [X10^x] at the bottom of keypad.
Enter the exponent (example 23)
with this example you will have entered Avogadro's number 6.022x10^23
Other example
1.6 [X10^x] (-) 19 enters the electron charge in Coulombs. The exponent is negative that is why you press the change sign key (-).

Aug 24, 2011 | Casio fx-300ES Calculator

### Express 0 000 000 678 in scientific notation Problem

If you want to see 0.000 000 678 as scientific notation, it would be 6.78 x 10^-7

But since your original number did not contain any decimals, you might have meant 0.0 000 000 678, in which case the answer would be 6.78 x 10^-8

The symbol ^ stands for "to the power of". So the first example would be pronounced Six point Seven Eight times Ten to the power of negative Seven.

Aug 01, 2011 | Computers & Internet

### I have a TI30XA calculator and want to know how to multiply numbers using scientific notation. I have learned how to enter a number (e.g., 1.5 x 10 -6), but when I try to multiply it by something (e.g.,...

Press 2nd [SCI] to switch the calculator to display all results in scientific notation. The results are the same whether you do it in scientific notation or not, it's just how the number is displayed.

Feb 13, 2011 | Texas Instruments TI-30XA Calculator

### After working a simple problem adding numbers in scientific notation, I want to convert the answer, a decimal, to scientific notation

For converting answer in to scientific notation do the following steps.

1.click shift key after that press mode key next to on button.

2.From the menu that is displayed in the screen press 7 for displaying answer in scientific notation.

Thank you.

Jun 10, 2010 | Casio FX-115ES Scientific Calculator

### 319.4 Scientific notation

3.194 * 10^2 is the scientific notation of the number 319.4

Apr 11, 2010 | SoftMath Algebrator - Algebra Homework...

### Scientific notation when not wanted.

Unfortunately, you don't. For numbers whose magnitudes differ too greatly from 1, the calculator automatically switches to scientific (or engineering) notation. You can press MODE and change the display settings, but there is no setting that will force the calculator to show this number without an exponent.

Feb 25, 2010 | Texas Instruments TI-83 Plus Calculator

### I am trying to calculate a problem using scientific notation but it is not giving me the correct answer and my calculator is set to 9 dec places the equation is 1.9x10^10- x 453.6 / 163871 I keep getting...

Hello,
Your notation expression contains an extra symbol ( either the - or the second x).
If I enter
(1.9x10^10)x453.6/163871 I get 5.262148845 x 10^7 about 5.3 x10^7
If I enter
(1.9x10^10 - 453.6)/163871 I get 1.159 x 10^5.
Your result is off by a factor of 100 to 10000.
As to the scientific display mode, you set it by pressing [MODE][->][SCI][ENTER] [2nd][QUIT]. You can leave the Float option to 9 digits if you want.

Hope it helps.

Oct 05, 2009 | Texas Instruments BA-II Plus Calculator

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