Homework question needed because physics teacher doesnt want to help me

[ArcherofScience]

Homework Statement

An electron travels 1.68 m in 6.74 × 10−8 s.
How fast is it traveling?
Answer in units of m/s

Homework Equations

The Attempt at a Solution

(1.68)/ (6.74 x 10 ^ -8) = 24925816.02

i asked the teacher on this education facebook thingy for our school called edmodo if i was getting it right, teacher said he didn't understand what i meant by that . He didn't answer my second question, I'm now confused.

 

[micromass]

Seems correct!

However, don't forget your units. This is very important as it will prevent you from making mistakes.

What you should write is:

$$\frac{1.68 m}{6.74\cdot 10 ^{ -8} s} = 24925816.02 \frac{m}{s}$$

 

[ArcherofScience]

so it is correct and my calculator isn't crazy? thankyou micro so much :D ! yes i won't forget my units! :)