Question

Convert the following to scientific notation: 0.000665.

a. 6.65 × 10-4
b. 6.65 × 104
c. 6.65 × 105
d. 6.65 × 10-5

Answer 1

a is the answer, 10^-4 means you move the decimal 4 places to the left

Answer 2

- - Step 1: Move the decimal point to the right, until you get greater then 1 and less than 10. In this case we moved it till we got 6.65.
- - Step 2: Count how many times you moved the decimal over: In this case, we moved it 4 times.
- - Step 3: All you have to do now is chose which one has 6.65 over -4.
(We are saying negative because when you move it to the right, it becomes negative.)
Final answer: A