can you help please

Question

 An archaeological team is excavating artifacts from a sunken merchant vessel on the ocean floor. To help with the exploration, the team uses a robotic probe. The probe travels approximately 4,800 meters at an angle of depression of 69.3° from the team’s ship on the ocean surface down to the sunken vessel on the ocean floor. 

a. If the probe travels horizontally at a speed of 5 meters per second, how long will it take for the probe to be underneath the ship?

Answer 1

Create a triangle, with the hypotenuse being 4800. The angle next to the hypotenuse is 69.3. If you use the formula arcsin(69.3) = x/4800, you'll find the horizontal distance that needs to be traveled. Divide that by 5 to find the total time it will take.

Answer 2

the depth of the sunken ship H = 4800 meters

speed S = 5 m/s

angle of depression α = 69.3

sin α = 4800 / L

L = 4800 / sin α = 5131 meters

time = L / S = 5131 / 5 = 1026.25 seconds = 17.1 minutes