5 The height of a ball t seconds after it is thrown is modelled by the function h(t) = -4.982 +240 +2, where h is the height of the ball in metres.
a Write down the initial height of the ball.
b Find the maximum height of the ball.
c Find the length of time the ball is at least 18 metres high,
d Find the amount of time elapsed when the ball hits the ground.

a) one student is chosen from classroom a, then a student is chosen from classroom b.  

step-by-step explanation:

independent events are ones in which the probability of one event does not affect the probability of the second event.

one student is chosen from classroom a; this does not affect the chances of choosing a student from classroom b.   this makes these independent events.

when one card is chosen from a standard deck and then set aside before a second card is chosen, the probability of the second card being chosen changes.   this makes them dependent events.

when one student is chosen from classroom a and then a second student is chosen from classroom a, the probability of choosing the second student changes.   this makes them dependent events.

when a letter is chosen from the alphabet and then a second letter is chosen, the probability of choosing the second letter changes.   this makes them dependent events.

the correct answer is d

hope this

what graph

step-by-step explanation: