Question

Determine the difference: 3.2 × 1010 – 1.1 × 1011 Write your answer in scientific notation.

–7.8 × 1010

B. –7.8 × 1011

C. –7.8 × 10–1

D. –0.78 × 1010

Answer 1

`-7.8*10^(10)`

Explanation:

we have

`3.2*10^(10) -1.1*10^(11)`

we know that

`3.2*10^(10)=0.32*10^(11)`

substitute

`0.32*10^(11) -1.1*10^(11)=-0.78*10^(11)=-7.8*10^(10)`