Someone which statements are true? check all that apply.

A) arc CB = 120°

              C) <COB = 2(m<CAB)

              D) <COB = 120°

Step-by-step explanation:

The measure of an inscribed angle is half the measure of its intercepted arc

⇆ The measure of an arc is twice the measure of its inscribed angle.

Thus, since <CAB = 60°, then arc CB = 120°   OPTION A

The measure of a central angle is congruent to its arc

⇆ The measure of an arc is congruent to the central angle.

Thus, since arc CB = 120°, then <COB = 120°  OPTION D

Since <COB = 120°, and <CAB = 60°,

then <COB = 2(m<CAB)  OPTION C

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