You are comparing velocities. Without a given acceleration, the time can not be found.
18) 36.36 rounded it is 36.4
22)53.71 rounded it it’s just 53.7
Answer:130
Step-by-step explanation:\
4.
The equation we have is:

To solve for "a", we want to isolate it in one side.
For this. we can start by multiplying each side by 5. This will make the denominator to cancel out:

Now, we can divide both sides by 8, which will cancel the coefficient 8 multiplying "a":

And that is the answer to 4.