I WILL GIVE YOU BRAINNEST Alexa is in a snowboarding competition. The equation h(x)=−76t2+30t+10 models Alexa's height h, in feet, in the air after (t) seconds. 1) How long is Alexa in the air?
2) When will Alexa reach a height of 15 feet?
3) To earn bonus in the competition, you must reach a height of 20 feet?

I'll give brainliest if you answer right : )

Match the vocabulary to the proper definition. in probability, two events in which 1. conditional probability the outcome of one event is independent of the outcome of a second event. 2. dependent events in probability, two events in which the outcome of one event is dependent on the outcome of a second event. the probability of an event in which the outcome of the event is conditional on the outcome of one or more different events. 3. independent events

Anyone know these questions? i need ,.