Question

estimation a group of students go out on a boat to go scuba diving. the instructor takes the group 47.58 feet below the surface to start. then they go up 30.78 feet and stop to see some fish. estimate the total change in distance from where they started at the surface. find the total change in distance from where they started at the surface. which of the following is the best estimate for the total change in distance from the group of students original position at the surface? round to the nearest ten. a. - 50 feet b. - 80 feet c. - 20 feet d. - 30 feet

Explanation:

Step1: Identify the movements

They go down 47.58 feet (negative movement) and then up 30.78 feet (positive movement).

Step2: Calculate the net - change

The net - change in distance is $- 47.58+30.78$.
$-47.58 + 30.78=-16.8$.

Step3: Round to the nearest ten

$-16.8$ rounded to the nearest ten is $- 20$.

Answer:

C. - 20 feet