Arthur drops a ball from a height of 81 feet above the ground. its height, h, is given by the equation h = –16t^2 + 81, where t is the time in seconds. for which interval of time is the height of the ball less than 17 feet?

Step-by-step explanation:

Arthur drops a ball from a height of 81 feet above the ground. Its height as a function of time is given by :

...........(1)

Where

t is in seconds

We need to find the time interval when the height of the ball is less than 17 feets. Equation (1) becomes :

When the time is more than 2 seconds, the height of the ball is less than 17 feet. Hence, this is the required solution.

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.