What is the equivalent to 3.5 hours

What are the relative frequencies, to the nearest hundredth, of the rows of the two-way table? group 1: a 15 b 45 group 2: a 20 b 25

Aball is dropped from a height of 10m above the ground. it bounce to 90% of its previous height on each bounce. what is the approximate height that the ball bounce to the fourth bounce?

Evaluate each expression. determine if the final simplified form of the expression is positive or negative -42 (-4)2 42