Abaseball is thrown a distance of 20 meters . what is its speed if it takes 0.5 seconds to cover the distance?

40 m/sec

Step-by-step explanation:

Speed = 20/0.5 = 20/(5/10)= 40

To find the speed, you need to divide distance by time.

So: 20/0.5 and that will equals to 40.

It takes 40 seconds.

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.

-4

step-by-step explanation:

do 6-10=

if u need it to be negative.