During a recent eruption, the volcano spewed out copious amount of ash. one small piece of ash was ejected from the volcano with initial velocity of 368 ft/sec. the height h, in feet, of our projectile is given by the equation h=-16t^2+368t. where t is the time in seconds. we assume that the volcano has no height 1. when does the ash projectile reach its maxim eight? 2. what is its maxim height? 3. when does the ash projectile return to the ground?

you are playing an adventure game on your computer. you come across a troll who won't let you pass and there is no other way to get to the other side of the river except over the bridge he is guarding.

the troll is a nerd. he takes great delight in watching people struggle with his problems. very few get them. he only gives you one chance and then he changes the puzzle. you have to solve this one.

before you are four blocks. they are numbered 11,6, -7,21.

he tells that the answer he wants is minus and between -1 and - 2. you can use +, -, ×, ÷   ( and ) as many times as you like or no times at all. you don't like the way he's looking at you, but you need to cross the bridge. what do you do?