Afirecracker shoots up from a hill 140 feet high, with an initial speed of 100 feet per second. using the formula h(t) = −16t2 + vt + s, approximately how long will it take the firecracker to hit the ground?

a: five seconds
b: seven seconds
c: nine seconds
d: 11 seconds

On friday, there were x students at the baseball game. on monday, there were half as many students at the game as there were on friday. on wednesday, there were 32 fewer students at the game as there were on friday. which expression could represent the total number of tickets sold for all 3 games?