How to convert 300g to 3kg

Idon’t quite understand this problem

If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =

Question 11 of 13 (1 point) jump to question: a stairway, ladder, or ramp must be present in excavations in which of the following situations? a. all trenches must have access/egress b. the trench is more than 15 feet wide but only 1 ½ feet deep c. the trench is more than 4 feet deep and the devices must be within 25 feet of all workers