HEL. Suppose a bird is 500 feet above the ground. It descends at a steady rate. After 10 seconds, it is 250 feet above the ground.
a) Write an equation that gives the height of the bird as a function of time. Be sure to define your variables!
b) After how many seconds will the bird land on the ground?

a)

b)

Step-by-step explanation:

a)

Let = height above ground

Let = time

Because the bird descended down to 250 feet in 10 seconds with a steady rate, that means it descends 25 feet per second.

∴  

b)

To find the time it takes until the bird reaches the ground, must equal :

∴ It takes 20 seconds for the bird to reach the ground.

its the fourth option