Answer: 9 × 10^8
Step-by-step explanation:
Scientific notation is a when numbers that are too big or small are expressed in a convenient manner by writing them in decimal form.
Scientific notation is usually used by mathematicians, and engineers, to simplify arithmetic operations. It I written as : a × 10^n i.e a times 10 raise to the power of n.
900 million= 900,000,000
Note that a = 9 and n= 8
900 million= 900000000 = 9×10^8.