Question

Perform the flowing operation and express answer in scientific notation4.21 x 10^7 + 1.91 x 10^7

Answer 1

`4.21 * {10}^(7) + 1.91 * {10}^(7)`

• First take
  `{10}^(7)`common from both the terms.

`= {10}^(7) (4.21 + 1.91)`

• Now do the addition and subtraction of the bracket portion.

`= {10}^(7) * 6.12`

• Since you have to express the answer in scientific notation, so you don't need to do anything else.
• So, our required answer is
  `6.12 * {10}^(7)`

Answer:

`6.12 * {10}^(7)`

Hope you could understand.

If you have any query, feel free to ask.