(steps are in picture)
a scuba diver was 80 feet below sea level and swam up at a rate of 4 feet per minute. the two solutions show how long it took the scuba diver to reach an elevation of 20 feet below sea level. lydia and max used the methods shown below to find the time it took the diver to reach the new elevation.
which step or steps of lydia’s solution is the same as max’s step of determining the change in the elevation?
a. step 1, writing the equation
b. steps 2 and 3, adding 80 to both sides to get 60
c. steps 4 and 5, dividing both sides by 4 to get 15
d. step 6, writing the answer