Maris has 1,400 minutes to use on her cell phone she has used 45% of her minutes how many minutes has she used

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

Let f(x) = 3 − x . find the average rate of change of f(x) from x = a to x = a + h and simplify your answer so that no single factor of h is left in the denominator.

Which shows the correct substitution of the values a, b and c from the equation 1=-2x+3x^2+1