Hint #1: Substitute in 15 for s(t) in the given equation. Hint #2: Use the Quadratic Formula or DESMOS

9)
Dennis the Menace is
shooting a rock with his
slingshot with an initial
height of 5 feet. The height,
in feet, of the rock above
the ground is given by
s(t) = -16t+44t + 5,
where t is time in seconds
and t > 0. At what time
will the rock be 15 feet
above the ground?

Bella want to know what the students at her school think of her show. which is the best group to survey to find this information a. go to the mall and ask all of the students she recognizes from school b. ask her viewers to call in durning an episode of the show c. get a list of students at her school from the office and use a random number generator to pick 30 of them d. get a list of students at her school from the office and pick the first 30 students on the list