Um. i’m pretty sure it’s just 30 feet
7. 335*0.2=67
8. 4.5/0.6=7.5
9. A
Hope this helps!
Answer:
Step-by-step explanation:
1) moving fast
2)solar system
3)
The point 6 cm away from the center travels in a circle of circumference 2π*(6 cm) = 12π cm, so that it covers this distance per revolution, 12π cm/1 rev.
So the disk has a linear speed of
(6000 rev/min) * (12π cm/rev) = 72,000π cm/min
which is equivalent to
(72,000π cm/min) * (1/100,000 km/cm) * (60 min/h)
or approximately 135.7 km/h.
