Answer:
Step-by-step explanation:
if you are going in a negative direction or by a decimal you are contracting, so the image would get smaller. If you are going in a positive direction(has to be a whole number as well) you have an expansion.
Answer:
A
Step-by-step explanation:
The theorem we use for this is

Solve for d.



A is the answer
Answer: Gear B turns 90 times when gear A turns 60 times
Step-by-step explanation: To solve this you just 30x3=90