Please help me, thank you so much!! It’s just the words, no photo just so you know.

Step-by-step explanation:

formula: a^2 + b^2 = c^2

a^2 + 15^2 = 17^2

a^2 + 30 = 289

       -30    -30

a^2 = 259

(square root)

a = approximately 16

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