Daniel dives into a swimming pool.  the height of his head is represented by the function  h(t) = -8t2  - 28t  + 60,  where  t  is  the time in seconds and  h(t) is  the height of his head, in inches. how many seconds will it take for daniel's head to reach the surface of the pool?

8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals

Acircle has a circumference of 7.850 units. what is its radius?

Traffic on saturday, it took ms. torres 24 minutes to drive 20 miles from her home to her office. during friday's rush hour, it took 75 minutes to drive the same distance. a. what was ms. torres's average speed in miles per hour on saturday? b. what was her average speed in miles per hour on friday?