Question

What is the sum 2x10^16 7x10^16 in scientific notation

Answer 1

`\huge\boxed{2*10^(16)+7*10^(16)=9*10^(16)}`

Explanation:

`2*10^(16)+7*10^(16)\qquad\text{use the distributive property}\\\\=(2+7)*10^(16)=9*10^(16)`

Answer 2

9 x 10^16

Explanation:

when adding or subtracting in standard form (aka scientific notation), the powers of 10 need to be the same. If they are just add the numbers and keep the same power of 10