Jack will have ten times more handball trophies than Michael has right now in three years. If Michael has 30 trophies right now, and the number of his trophies increases by 100 in three years, what's the total number of trophies they'll have altogether after three years? Think carefully first, then make a decision:
In three years, Michael will have 30 + 100 = 130 trophies. If Michael has 30 trophies now, Jack will have 10 * 30 = 300 in three years. Altogether, Jack and Michael will have 300 + 130 = 430 handball trophies in three years. So, the answer is 430.