Which polynomial function has a leading coefficient of 1 and roots 21 and 31 with multiplicity 1?
f(x) = (x - 2)(x – 31)
f(x) = (x + 21)(x + 3)
f(x) = (x - 2)(x − 3)(x - 2)(x – 31)
fix) = (x + 2y + 211

12m

step-by-step explanation:

square root means have of a number so have of 3 is 1.5 then multiply it by 8 and you get your answer!

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