Aball is thrown in the air from a ledge. its height in feet is represented by f16(2-5x - 6), where x is the number of seconds since the ball has been thrown. the height of the ball is 0 feet when it hits the ground. how many şeconds does it take the ball to reach the ground?

Height in feet is represented by

The height of the ball is 0 feet when it hits the ground.

So we replace height f(x) by 0 and solve for x  to find the time taken to reach the ground

( divide by -16 on both sides)

Now factor it

(x-6)(x+1) =0

x-6 =0  and x+1=0

x=6 and x=-1

Time cannot be negative so we ignore -1

x = 6 seconds

It will take 6 seconds for the ball to reach the ground.

b.an increase in a causes b to decrease

answer: i believe the answer is e

step-by-step explanation: