Answer:
a) See the below explanation.
b) 43.57 seconds
Explanation:
We can represent the time 2:54.29 as:
2 minutes + 54.29 seconds
a)
To show that this is the same as 174.29 seconds, we can rewrite the minutes part of the expression as seconds using the conversion:
1 minute = 60 seconds
Thus, we can show that:
2 minutes = 2 × 1 minute
= 2 × 60 seconds
= 120 seconds
When we rewrite 2 minutes as 120 seconds, the expression becomes:
120 seconds + 54.29 seconds
which simplifies to:
174.29 seconds
b) We can find the average time of each of the four runners by dividing the total time taken by all of them (174.29 seconds) by the number of runners (4).
174.29 seconds / 4 ≈ 43.57 seconds