The function f(x) = –10(x)(x – 4) represents the approximate height of a projectile launched from the ground into the air as a function of time in seconds, x. how long, from launch to landing, does the projectile stay in the air?

For 4 seconds the projectile will be in the air.

Step-by-step explanation:

The function f(x) = –10(x)(x – 4) represents the approximate height of a projectile launched from the ground into the air as a function of time in seconds, x.

Now, if the projectile stays for x seconds in the air then after x seconds its height will be zero.

Hence, 0 = - 10x(x - 4)

⇒ x = 0 or x = 4

Now, x cannot be 0 as at time = 0 the projectile starts its motion.

So, for 4 seconds the projectile will be in the air. (Answer)

x > 1.3

step by step:

8.5−0.9x> 9.8−1.9x

step 1: simplify both sides of the inequality.

−0.9x+8.5> −1.9x+9.8

step 2: add 1.9x to both sides.

−0.9x+8.5+1.9x> −1.9x+9.8+1.9x

1x+8.5> 9.8

step 3: subtract 8.5 from both sides.

1x+8.5−8.5> 9.8−8.5

1x> 1.3

step 4: divide both sides by 1.

1x/1 > 1.3/1

honesty mood

step-by-step explanation: