h(t) = 3 + 2sin(0.5236t)
h = depth in meters (water)
t = number of hours after 7
1) A certain ship can only enter the harbor if the depth is 4.5m or more. For how long can this ship stay at the harbor?
The Attempt at a Solution
I tried getting both of the sine solutions 1.619 and 2.293. I substracted the former from the latter but that didn't work. Can anyone point me in the right direction?