What are the domain and range of the step function below ?

The amount of energy it takes to lift a box might be a function of which of the following

What is the probability of throwing several dice with sum equal to 6 (six)? show the ways of possibilities for sum 6 (as the numerator) and the ways of throwing n dices for n = 1, 2, 3, 4 or 5 as denominator for all the questions to earn full credits. (a)throw one die, (b) throw two dice, (c) throw three dice (d) throw 4 dice, (e) throw 5 dice

Assume that y varies inversely with x. if y=1.6 when x=0.5 find x when y=3.2