4. A rocket is launched with an initial vertical velocity of 110m/sec. The height of the rocket in meters is approximated by the quadratic equation h = -5t2 + 110t where t is the time after the launch
in seconds.
About how long does it take (in seconds) for the rocket to return to the ground? (Hint; Draw a
picture of the parabolic flight of the rocket and solve for the zeros of the given quadratic equation.)

The monthly texting plan of all star cell is $11 per month and $0.25 per text. the monthly texting plan of top line cell is $14 per month and $0.15 per text. a student wants to set up a system of equations to find the number of texts for which the total monthly cost of the two companies is the same. he uses the variables x and y. he lets y represent the total monthly cost. what will x represent? x = number of texts x = cost of the total number of texts x = total monthly cost x = cost of each text