Classify each polynomial expression by number of terms and by degree. Identify the leading coefficient

Which graph represents an even function?

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

Which expression is rational? 6. , square root two, square root 14, square root 49