For years of 1980 to 1990, the number of mountain owners m ( in millions ) in the US can be approximated by the model m=.377t^2 – 2.265t + 3.962,3 ≤ t ≤ 10 where t = 3 represents 1983.
1. In which year did 2.5 million people own mountain bikes?
2. In what year was the number of mountain bike owners at a minimum?

I’ll really appreciated if it’s was posible to explain how did you got the answer. Thank you

true

step-by-step explanation:

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m

answer: 0.1,0.85

step-by-step explanation:

the answer to your question is b.