At the beginning of the fall, the water level of a lake is 12
feet below normal level. After a drought, the lake's water
level dropped 13 feet. Where is the lake's current water
level in relation to its normal water level?
OS

x = normal water level

x - 12 - 13 = x - 25

so it is 25 feet below the normal water level

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m