Write the ratio as a fraction in simplest form, with whole numbers in the numerator and denominator. 8 to 20

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225

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