A runner hopes to complete the 9.9 km run in less than 30.2 min. After running at constant speed for exactly 27.1 min, there are still 1.2 km to go. The runner must then accelerate at 0.21 m/s2 for how many seconds in order to achieve the desired time? Your answer must include two digits after the decimal point and maximum of 5% of error is accepted in your answer.

A runner hopes to complete the 9.9 km run in less than 30.2 min. After running at constant speed for exactly 27.1 min, there are still 1.2 km to go. The runner must then accelerate at 0.21 m/s2 for how many seconds in order to achieve the desired time? Your answer must include two digits after the decimal point and maximum of 5% of error is accepted in your answer.

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Ce A webassign.net/web/Student/Assignment-Responses/submit?dep=27519463&tags=autosave#question3572106_11 (h) 0.0207 3 DETAILS A walker covers a distance of 2.2 km in a time of 32 minutes. What is the average speed of the walker for this distance in km/h? km/h 5. DETAILS A tortoise and a hare cover the same distance in a race. The hare goes very fast for brief intervals, but stops frequently, whereas the t hare. (a) Which of the two racers has the greater average speed over the duration of the race? OThe tortoise has the greater average speed since he was the winner. The hare has the greater average speed since he can go faster. Their average speeds are equal. OIt's impossible to determine who had the greater average speed without collecting data. (b) Which of the two racers is likely to reach the greatest instantaneous speed during the race? OThe tortoise has the greater instantaneous speed since he was the winner. OThe hare has the greater instantaneous speed since he can go faster.
I know I have to find the difference in their times to solve this practice problem.
pls help solve this problem
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