The initial speed of a rocket is 5 m/s. At the end of each year, the value of the rocket changes by 4 m/s. What will be the value of the rocket at the end of the fifth year? 0. 25 m/s 1. 15 m/s 2. 12 m/s 3. 20 m/s

To determine the value of the rocket's speed at the end of the fifth year, we need to understand that the rocket's speed changes by 4 m/s every year starting from an initial speed of 5 m/s .
Let's break this down step by step:

Initial speed in Year 0 : The rocket starts with a speed of 5 m/s.

Increment each year : The speed increases by 4 m/s every year.

Year 1 : At the end of Year 1, the speed will be:
5 m/s + 4 m/s = 9 m/s

Year 2 : At the end of Year 2, the speed will be:
9 m/s + 4 m/s = 13 m/s

Year 3 : At the end of Year 3, the speed will be:
13 m/s + 4 m/s = 17 m/s

Year 4 : At the end of Year 4, the speed will be:
17 m/s + 4 m/s = 21 m/s

Year 5 : Finally, at the end of Year 5, the speed will be:
21 m/s + 4 m/s = 25 m/s


Therefore, the value of the rocket's speed at the end of the fifth year is 25 m/s .
The correct answer is the first option, 0. 25 m/s .

Answered by DanielJosephParker | 2025-07-21