Answer:
a.

b.

Explanation:
The scientific notation is when numbers are written in the form;
, where n is an integer and
.
The given number is : 3,430,000
The decimal point is currently after the last digit: 3,430,000.0
We move it back until we get k=3.43 and n=6.
The scientific notation is:

b. The second number is 0.004532
We can clearly see the decimal point this time.
We move forward until we get k=4.532 and n=-3
The scientific notation is:
