Question

a hiker is increasing her elevation by 2 feet per minute. She is now at sea level (elevation of 0 feet). what was her elevation 10 minutes ago

Answer 1

we know that

the rate of elevation is 2 feet per minute

so

Find out the elevation in 10 minutes

Multiply 2 ft/min by 10 min

2*10=20 ft

therefore

her elevation 10 minutes ago is

0-20=-20 ft ----> is negative because is below sea level

the answer is

-20 ft or 20 ft below the sea level