Subtract 4.66 x 10^-5 - 7.34 x 10^-7
Answers:
1. 4.586 x 10^-5
2. $2.9219 x 10^13
3. 3.2 x 10^-11
4. A red blood cell has a bigger diameter than a platelet by 5.17 x 10^6 m
5. 5 x 10^7
To subtract these two numbers in scientific notation, we need to ensure that the exponents are the same. In this case, we can rewrite the numbers as:
4.66 x 10^-5 - 7.34 x 10^-7 = 4.66 x 10^-5 - 0.734 x 10^-6
Now, we can subtract the numbers:
4.66 x 10^-5 - 0.734 x 10^-6 = 4.66 x 10^-5 - 0.00734 x 10^-5 = 4.65266 x 10^-5
So, the answer is 4.65266 x 10^-5, which is not one of the given choices.
To subtract two numbers in scientific notation, you need to have the same power of 10.
In this case, we can rewrite the numbers as:
4.66 x 10^-5 - 7.34 x 10^-7
To subtract the numbers, we first make the powers of 10 the same by moving the decimal point:
4.66 x 10^-5 = 0.0000466
7.34 x 10^-7 = 0.000000734
Now we can subtract the numbers:
0.0000466 - 0.000000734 = 0.000045866
Finally, we convert the result back to scientific notation:
0.000045866 = 4.586 x 10^-5
Therefore, the answer is 4.586 x 10^-5. Option 1 is the correct answer.
To subtract the numbers in scientific notation, you need to ensure that the exponents are the same. Here's how you can do it step by step:
1. Subtract the decimal part: 4.66 - 7.34 = -2.68.
2. To make the exponents the same, you need to align the decimal point by shifting it to the left or right. In this case, we need to shift it to the right to align with the smaller exponent (-5).
3. Shift the decimal in -2.68 to the right two places, giving you -0.0268.
4. Rewrite the result in scientific notation: -0.0268 x 10^-5.
So, the correct answer is: -0.0268 x 10^-5, which is not one of the options provided.