As elevation increases, temperature decreases. At which elevation will sound travel fastest?

500 meters
1,000 meters
1,500 meters
2,000 meters

Sound travels faster at higher elevations because there is less interferences.

The answer would be 2000 meters

75 tickets have been sold so far.

step-by-step explanation:

in this question it is clearly mentioned that 45 children's tickets have been sold and this number is 60% of the total tickets sold.

now let's assume the total number of tickets sold be x.

then 60% of x = 45

⇒

⇒ x(.6) = 45

by dividing with .6 on both the sides of the equation

⇒ x = 75

therefore 75 tickets have been sold so far.