Please please please I need someone who knows mathematics and someone who knows biology and someone who knows physics, very, very necessary

Afigure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 20.9 12000 200 3.33

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?

Consider a system to be two train cars traveling toward each other. what is the total momentum of the system before the train cars collide?   kg • what must the total momentum of the system be after the train cars collide?   kg •