ivytech exploration page

[linkotan]

i cannot figure out how to set this beast up. i can't tell if i need all of the information or if they're just trying to throw me off.

"frustrated with dealing with the USEPA about air pollution at his plant, Ricky's Reasonalbe Rockers, Inc., Ricky Ray took his cell phone and threw it off the top of his office building. the height h(t) of the cell phone at the time (t) is described by the function h(t)=-16t(squared)+64t+192"

A) when will Ricky's cell phone be at the height of 240 feet?
B) how many seconds will it take before Ricky's cell phone hits the ground?

can someone put this to me in a simple way? (or more simply if it already seems simple) please and thank you!

 

[Deleted member 4993]

i cannot figure out how to set this beast up. i can't tell if i need all of the information or if they're just trying to throw me off.

"frustrated with dealing with the USEPA about air pollution at his plant, Ricky's Reasonalbe Rockers, Inc., Ricky Ray took his cell phone and threw it off the top of his office building. the height h(t) of the cell phone at the time (t) is described by the function h(t)=-16t(squared)+64t+192"

A) when will Ricky's cell phone be at the height of 240 feet?

You know the relationship between time (when) and distance (height)

h = -16t^2 + 64t + 192

so you have:

240 = -16t^2 + 64t + 192

Above is a quadratic equation - solve for 't'

B) how many seconds will it take before Ricky's cell phone hits the ground?

Again you need to use the same relation [h = -16t^2 + 64t + 192]. However, now you get to assign the value of 'h'.

What do you think it should be? Why?

Please show us your work, indicating exactly where you are stuck, so that we know where to begin to help you.

can someone put this to me in a simple way? (or more simply if it already seems simple) please and thank you!

 

[Denis]

"frustrated with dealing with the USEPA about air pollution at his plant, Ricky's Reasonalbe Rockers, Inc., Ricky Ray took his cell phone and threw it off the top of his office building. the height h(t) of the cell phone at the time (t) is described by the function h(t)=-16t(squared)+64t+192"

Why can't teachers "keep it simple", like ONLY this:
"The height h(t) of a falling article at time (t) is described by the function h(t) = -16t^2 + 64t + 192"
The time it takes them to invent cute stories would be better spent TEACHING :shock:
Plus the student would not lose precious time (on a timed test) reading unnecessary garbage...

 

[Deleted member 4993]

Depends on - what was the objective of posing the problem.

If the objective was to find whether the student can plug & chug or not - then ofcourse your "spartan" version is preferable.

However, a "short-story" problem, in addition tests for problem identification.

In homework assignments - I don't have any objection regarding "short story" problems. They have plenty of time to think about - shouldn't get flustered. Will help to spread the curve.

 

[Deleted member 4993]

Depends on - what was the objective of posing the problem.

If the objective was to find whether the student can plug & chug or not - then ofcourse your "spartan" version is preferable.

However, a "short-story" problem, in addition tests for problem identification(diagnosis).

In homework assignments - I don't have any objection regarding "short story" problems. They have plenty of time to think about - shouldn't get flustered. Will help to spread the curve.

 

[chivox]

Depends on - what was the objective of posing the problem.

If the objective was to find whether the student can plug & chug or not - then ofcourse your "spartan" version is preferable.

However, a "short-story" problem, in addition tests for problem identification.

In homework assignments - I don't have any objection regarding "short story" problems. They have plenty of time to think about - shouldn't get flustered. Will help to spread the curve.

On statewide standardized tests, more kids omit problems that do not have a context, even when taking difficulty and position on the test into account, for the record. On the other hand, Ricky Ray's rocks and rockers should not be a story about cellphones and the EPA. I would certainly suggest taking this superfluous context out before giving it to 150,000 students. I don't have anything to say about what individual teachers use in their classrooms.