14.     what's the length of a segment that begins at the point (2, 3) and ends at the point (18, 15)?                 a.  28      b.  18      c.  20      d.  15

20

Step-by-step explanation:

d = √(xb - xa)2 + (yb - ya)2 =

= √(18 - 2)2 + (15 - 3)2 =

= √162 + 122 = √256 + 144 =

= √400  

= 20

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