Sarah threw a ball with a initial velocity of 22 meters per second. the quadratic function h(t)=4.9t^2+22t+5.5 represents the height of the ball above the ground, in meters, with respect of time t, in seconds. determine h(3) and explain what it represents

h(3) means that t = 3 seconds.

Replace t in the equation and solve:

h(t) = 4.9t^2+22t+5.5

h(3) = 4.9(3)^2+22(3) +5.5

h(3) = 4.9(9) + 66+5.5

h(3) = 44.1 + 71.5

h(3) = 115.6

This means the ball was 115.6 meters above the ground at 3 seconds.

answer: a and c are correct

step-by-step explanation:

the +5 is the vertical translation

the added negative symbol in front is the reflection over the y-axis

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.