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15-04-2020
Mathematics

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PLEASE ANSWER 20 POINTS + BRAINLIEST
An Indy race car driver makes a pit stop at the beginning of a lap. The time t in seconds that it takes the driver to complete the lap, including the pit stop, can be modeled by t(x) = 12x+9000 / x where x is the driver’s average speed in miles per hour after the pit stop. The driver’s average speed after the pit stop is 210 mi/h. How long does it take the driver to complete the lap, including the pit stop?

Please show your work

Respuesta :

JessTheMess714 JessTheMess714

15-04-2020

Answer:

t = 54.85714 seconds

Step-by-step explanation:

t = 12(210)+9000/210

t = (2520 + 9000) / 210

t = 11520 / 210

t = 54.85714 seconds

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