Question

A submarine starts at sea level and descends at a rate of 15 meters per minute for 2 hours. Which statement best describes the submarine descent mark all that apply.
a. submarine has descended 600m after an hour
b. halfway into his descent, the submarine has descended 900 m
c. after 0.5 hours, the submarine had descended 450 m
d. the the submarine descends to a depth of 1800 m
e. after 2 hours, the depth of a submarine is double what it was after an hour
f. after 2 hours, the depth of the submarine is triple what it was after 0.5 hours

Answer 1

Hi! If the submarine is descending at a rate of 15 meters per minute, then it has descended 900 meters in one hour (15*60=900). This would mean that option A is FALSE and option B is TRUE since halfway to the submarine's descent is 1 hour.

In half an hour, the submarine has descended 450 meters therefore option C is also TRUE. After 2 hours, the submarine has descended 1800 meters. Therefore, options D and E are also TRUE. Option F is FALSE since 450*3 is not equal to 1800.

ANSWER: B, C, D, E

Answer 2

The answer is B im pretty sure