A rock is projected directly upward from ground level. After t seconds, its height is given by: f(t) = -16t? + 64t + 80.
a
a)
After how many seconds will it reach a height of 144 ft?
b)
When will the rock return to the ground?

City l has a temperature of −3 °f. city m has a temperature of −7 °f. use the number line shown to answer the questions: number line from negative 8 to positive 8 in increments of 1 is shown. part a: write an inequality to compare the temperatures of the two cities. (3 points) part b: explain what the inequality means in relation to the positions of these numbers on the number line. (4 points) part c: use the number line to explain which city is warmer. (3 points)