a rectangular pen for a [et is 7 feet longer than it is wide. Given the possible values for the width of the pen if its area must be between 170 and 800 square feet.

Question

chaise · Answer

You could just guess some values and see if it is between the area restrictions. Although there is an actual process to achieving the desired result - using derivatives. Is this what you're after?

anonymous · Answer

yes i need to know the exact ones

chaise · Answer

Best off looking up maximising/minimising equations on youtube. It's a very length process. PatrickJMT has some nice videos.

anonymous · Answer

Solve the following equations for w respectively:
{w (w + 7) = 170,  w (w + 7) = 800} -> {w = 10, w=25}
10 < w < 25