A word problem for the expression 5+(-2) The sum will be three i just need a word problem

What is the value of the expression below? (81^2)^1/8

The chs baseball team was on the field and the batter popped the ball up. the equation b(t)=80t-16•16+3.5 represents the height of the ball above the ground in feet as a function of time in seconds. how long will the catcher have to get in position to catch the ball before it hits the ground? round to the nearest second

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.