Answer:
120 times
Step-by-step explanation:
If we want to find a qunatity is how many times as other quantity, we have to divide the large one by the small one (remember, same units).
Let's make both into inches.
We have 1 inch [model]
also
10 feet * 12 = 120 inches
Thus, we can say:
120/1 = 120 times
So, Actual Plane is 120 times than model airplane
Answer:

Step-by-step explanation:
Given

Required
Determine an equivalent expression
Express 81 as 

Apply law of indices






Hence:

Answer:
9:5
ratios are just putting the numbers next to each other with ':' in the middle
Step-by-step explanation:
I think you will have t use theorem
Ba=Rv^2+vo^2
Ba=4^2+7^2
Ba=16+49
Ba=65