problem on apti

[softy]

In Madras , temperature at noon varies according to t^2/2 + 4t + 12
(Read is as: tsquare /2 + 4t +12), where t is elapsed time. Find how
much percentage of temperature is increased (or decreased) between 5pm
and 8pm. (HINT: substitute&subtact values from 5 to 8)

 

[red floyd]

In Madras , temperature at noon varies according to t^2/2 + 4t + 12
(Read is as: tsquare /2 + 4t +12), where t is elapsed time. Find how
much percentage of temperature is increased (or decreased) between 5pm
and 8pm. (HINT: substitute&subtact values from 5 to 8)

Your answer can be found in FAQ 5.2

http://www.parashift.com/c++-faq-lite/how-to-post.html#faq-5.2

 

[Paul N]

In Madras , temperature at noon varies according to t^2/2 + 4t + 12
(Read is as: tsquare /2 + 4t +12), where t is elapsed time. Find how
much percentage of temperature is increased (or decreased) between 5pm
and 8pm. (HINT: substitute&subtact values from 5 to 8)

This looks a poorly-worded question. For one thing, if the formula is
truly telling you the "temperature at noon" then how can you work out
the temperature at other times? Also, is an increase from 15 degrees C
(59F) to 20C (68F) an increase of 33% or 15%?