Answer:
221,000,000,000,000,000,000 = 2.21 x 10^20
therefore, the answer is b
Step-by-step explanation:
That number is already in standard form.
If you need to write it in scientific notation, then do this.
<span>731,934,000
Look at all the digits that are not zero, and place the decimal point in a way that you have a number from 1 to less than 10.
Take 731934, and place the decimal point after the 7 giving 7.31934.
The original decimal point was after the third zero, so now using the original number, count the number of decimal places you moved the decimal point. The decimal point moved 8 places to the left. That means you need an exponent of 8.

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Answer:
94%
Step-by-step explanation:
First, converting R percent to r a decimal
r = R/100 = 5.3%/100 = 0.053 per year.
Putting time into years for simplicity,
53 days / 360 days/year = 0.147222 years.
Solving our equation:
A = 502.45(1 + (0.053 × 0.147222)) = 506.3704997767
A = $506.37
The total amount accrued, principal plus interest, from simple interest on a principal of $502.45 at a rate of 5.3% per year for 0.147222 years (53 days) is $506.37.