Question

Pls help

Simplify (7.4 × 10−8) − (3.8 × 10−9). Write the final answer in scientific notation.

3.6 × 101
3.6 × 10−1
7.02 × 10−8
7.02 × 10−9
(if you could explain how to do this that would really help)

Answer 1

Anything you multiply in 10 you just need to move the dot one space right. So 7.4x10 is 74. Then, you need to subtract the 8 and you’re done with the first be parenthesis. (74-8=66). In the next parenthesis you do the same. 3.8x10 is 38 and 38-9 is 29. Now just subtract 38 from 66 and you have the answer.

Remember to always solve each parenthesis first, then do multiplying and division and in the end adding and subtracting. Good luck

Answer 2

Answer: Guess

(Reason: Guessing is important for your mind. it may be hard for to guess but id say im guess for this answer is)

1. 363.6

2.35

3.62.2

4.61.2

I hope it helps!