A ball is thrown downward from the top of a 240-foot building with an initial velocity of 12 feet per second. The height of the ball h in feet after t seconds is given by the equation h=-16t^2 - 12t + 240. How long after the ball is thrown will it strike the ground?

And we can use the quadratic formula given by:

Where . And replacing we got:

And after solve we got:

Since the time cannot be negative our final solution would be  

Step-by-step explanation:

We have the following function given:

And we want to find how long after the ball is thrown will it strike the ground, so we want to find the value of t that makes the equation of h equal to 0

And we can rewrite the expression like this:

And we can use the quadratic formula given by:

Where . And replacing we got:

And after solve we got:

Since the time cannot be negative our final solution would be  

part d

step-by-step explanation:

theresa talked her parents into getting sd cards for her phone and her brother’s phone. inserting an sd card into a phone gives it more storage. they both get 8-gigabyte sd cards. how many bits of storage come with each sd card? type your answer in both scientific and standard notation.

answer: you need to organize this better it does not make sense.

step-by-step explanation: ?