Use Pythagorean theorem (a^2=c^2-b^2)
I think the answer is 30
Because I did 150÷500×100
The distance in kilometers in scientific notation 
<h3>Scale factors</h3>
Scale factors are values or constants multiplied with a variable
If Alvin and Simon raced a distance of
kilometers and they need to race 7 times that distance in a kilometer, the distance traveled will be:
- Distance travelled =

- Distance travelled =

Hence the distance in kilometers in scientific notation 
Learn more on distance here: brainly.com/question/23848540
The answer will be 0.40 because 2 divided by 5 is 0.40
Answer:
5.) b = -2/5 (or -0.4 in decimal form)
6.) 20.5