Answer:
Step-by-step explanation:
Sum of the amount of time spend on three training= 6 + 52 + 45
= 143 seconds
Average time = 51 seconds
Sum of the amount of time spend on four training's = 51 * 4 = 204
The maximum amount of time she can spend on her fourth race = 204 - 143
= 61 seconds
Answer:
The maximum amount of time she can spend on her fourth race = 61 seconds
Step-by-step explanation:
Jessica's training on the 400 meter relay race.
Distance of relay = 400 m
We need to find time for fourth race so that her race to average at most 51 seconds.
Total time taken = 46 + 52 + 45 + t = 143 + t
[tex]\texttt{Average time =}\frac{\texttt{Total time}}{4}=\frac{143 + t}{4}[/tex]
Average should be at most 51
That is
[tex]\frac{143 + t}{4}\leq 51\\\\143 + t\leq 204\\\\t\leq61[/tex]
The maximum amount of time she can spend on her fourth race = 61 seconds
