## anonymous one year ago Miranda is adding the numbers below. 2.9 * 10^10 + 5.35 * 10^10 What is the sum written in scientific notation? A. 82.5*10^-11 B. 82.5*10^11 C. 8.25*10^20 D. 8.25*10^10

1. anonymous

@mathmate

2. kropot72

A common factor of the two terms is 10^10, so we can write: 10^10(2.9 + 5.35) = ?

3. anonymous

82500000000

4. mathmate

" in scientific notation" means that you would have to write the number between 1 and 10 (but excluding 10) and multiply by an appropriate power of 10. For example, 525000 is written as $$5.25\times 10^5$$ in scientific notation.