Question

What is each number written in scientific notation?
1. 1,220,000,000
2. 0.0287

Answer 1

if we have a number
say 12, it's scientific form will be 1.2*10^1
now employing this technique to the given question
1) 1,220,000,000
1.220*10^9
2)0.0287
2.87/100
2.87*10^-2