Math help please

Question

After visiting the Titanic, Captain Brain and Mr. Pinky are taking the Alvin submarine back to the surface of the water. They start 1640 meters below the surface of the water, and ascend at 42 meters per hour. Note: under the water is a negative number.

After how many hours does the submarine reach the surface? Give your answer as a decimal rounded to one decimal place.  hours

Answer 1

The submarine starts 1640 meters below the surface of the water and ascends at a rate of 42 meters per hour. To calculate the time required to reach the surface:

Initial depth = -1640 meters (below the surface)

Rate of ascent = 42 meters per hour

Using the formula to find the time (t):

0 = -1640 + 42t

t = 1640 / 42

t = 39.0 hours (rounded to one decimal place)

Therefore, it takes 39.0 hours for the submarine to reach the surface.