Question

The elevation at ground level is 0 feet an elevator starts 90 feet below ground level. After traveling for 15 seconds, the elevator is 20 feet below ground level. Which statement describes the elevators rate of change in elevation during this 15 second interval?

Answer 1

The elevator's rate of change in elevation over the 15-second interval was 4.67 feet per second, as it ascended from 90 feet below to 20 feet below ground level.

Step-by-step explanation:

Rate of Change in Elevator Elevation

The question asks us to determine the rate of change in the elevator's elevation over a 15-second interval. Starting 90 feet below ground level and reaching 20 feet below ground level after 15 seconds means that the elevator ascended 70 feet (90 - 20 feet). To find the rate of change, divide the total change in elevation by the time taken. The calculation is as follows:

Rate of Change = ∆ Elevation / Time = 70 feet / 15 seconds = 4.67 feet per second.

Therefore, the elevator's rate of change in elevation during the 15-second interval was 4.67 feet per second.

Answer 2

the elevator traveled upward at a rate of 4 2/3 feet per second