Question

a submarine descends at a rate of 2.5 meters per minute. after 3 minutes what is the submarines depth it traveled? a 75 meters b -75 meters c 7.5 meters d -7.5 meters

Explanation:

Step1: Identify the rate and time

The rate of descent $r = 2.5$ meters per minute and time $t=3$ minutes.

Step2: Use the distance - rate - time formula

The distance $d$ (depth in this case) is given by $d=r\times t$. Substitute $r = 2.5$ and $t = 3$ into the formula: $d=2.5\times3 = 7.5$ meters. Since it is descending (going downwards), the depth is represented as a negative value in a coordinate - like system where up is positive and down is negative. So the depth is $- 7.5$ meters.

Answer:

D. -7.5 meters