Answer:
17 floors
Step-by-step explanation:
1 floor every 4 seconds.
90/4 = 22.5
40 - 22.5 = 17.5
17.5 is 17ish floors, and is the only answer that is close to 17 floors.
y=4
I'm a little rusty at this but y=4 should be the correct answer.
Hope this helps!
20 is the LCM of 5 and 20.
....
10%
sorry if u fail yeahh